model_brush.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #include "quakedef.h"
  22 #include "image.h"
  23 #include "r_shadow.h"
  24 #include "polygon.h"
  25 #include "curves.h"
  26 #include "wad.h"
  27
  28
  29 cvar_t r_trippy = {CF_CLIENT, "r_trippy", "0", "easter egg"};
  30 //cvar_t r_subdivide_size = {CF_CLIENT | CF_ARCHIVE, "r_subdivide_size", "128", "how large water polygons should be (smaller values produce more polygons which give better warping effects)"};
  31 cvar_t r_novis = {CF_CLIENT, "r_novis", "0", "draws whole level, see also sv_cullentities_pvs 0"};
  32 cvar_t r_nosurftextures = {CF_CLIENT, "r_nosurftextures", "0", "pretends there was no texture lump found in the q1bsp/hlbsp loading (useful for debugging this rare case)"};
  33
  34 cvar_t r_subdivisions_tolerance = {CF_CLIENT, "r_subdivisions_tolerance", "4", "maximum error tolerance on curve subdivision for rendering purposes (in other words, the curves will be given as many polygons as necessary to represent curves at this quality)"};
  35 cvar_t r_subdivisions_mintess = {CF_CLIENT, "r_subdivisions_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
  36 cvar_t r_subdivisions_maxtess = {CF_CLIENT, "r_subdivisions_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
  37 cvar_t r_subdivisions_maxvertices = {CF_CLIENT, "r_subdivisions_maxvertices", "65536", "maximum vertices allowed per subdivided curve"};
  38 cvar_t mod_q3bsp_curves_subdivisions_tolerance = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_subdivisions_tolerance", "15", "maximum error tolerance on curve subdivision for collision purposes (usually a larger error tolerance than for rendering)"};
  39 cvar_t mod_q3bsp_curves_subdivisions_mintess = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_subdivisions_mintess", "0", "minimum number of subdivisions for collision purposes (values above 0 will smooth curves that don't need it)"};
  40 cvar_t mod_q3bsp_curves_subdivisions_maxtess = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_subdivisions_maxtess", "1024", "maximum number of subdivisions for collision purposes (prevents curves beyond a certain detail level, limits smoothing)"};
  41 cvar_t mod_q3bsp_curves_subdivisions_maxvertices = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_subdivisions_maxvertices", "4225", "maximum vertices allowed per subdivided curve for collision purposes"};
  42 cvar_t mod_q3bsp_curves_collisions = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_collisions", "1", "enables collisions with curves (SLOW)"};
  43 cvar_t mod_q3bsp_optimizedtraceline = {CF_CLIENT | CF_SERVER, "mod_q3bsp_optimizedtraceline", "1", "whether to use optimized traceline code for line traces (as opposed to tracebox code)"};
  44 cvar_t mod_q3bsp_lightmapmergepower = {CF_CLIENT | CF_ARCHIVE, "mod_q3bsp_lightmapmergepower", "4", "merges the quake3 128x128 lightmap textures into larger lightmap group textures to speed up rendering, 1 = 256x256, 2 = 512x512, 3 = 1024x1024, 4 = 2048x2048, 5 = 4096x4096, ..."};
  45 cvar_t mod_q3bsp_nolightmaps = {CF_CLIENT | CF_ARCHIVE, "mod_q3bsp_nolightmaps", "0", "do not load lightmaps in Q3BSP maps (to save video RAM, but be warned: it looks ugly)"};
  46 cvar_t mod_q3bsp_tracelineofsight_brushes = {CF_CLIENT | CF_SERVER, "mod_q3bsp_tracelineofsight_brushes", "0", "enables culling of entities behind detail brushes, curves, etc"};
  47 cvar_t mod_q3bsp_sRGBlightmaps = {CF_CLIENT, "mod_q3bsp_sRGBlightmaps", "0", "treat lightmaps from Q3 maps as sRGB when vid_sRGB is active"};
  48 cvar_t mod_q3bsp_lightgrid_texture = {CF_CLIENT, "mod_q3bsp_lightgrid_texture", "1", "directly apply the lightgrid as a global texture rather than only reading it at the entity origin"};
  49 cvar_t mod_q3bsp_lightgrid_world_surfaces = {CF_CLIENT, "mod_q3bsp_lightgrid_world_surfaces", "0", "apply lightgrid lighting to the world bsp geometry rather than using lightmaps (experimental/debug tool)"};
  50 cvar_t mod_q3bsp_lightgrid_bsp_surfaces = {CF_CLIENT, "mod_q3bsp_lightgrid_bsp_surfaces", "0", "apply lightgrid lighting to bsp models other than the world rather than using their lightmaps (experimental/debug tool)"};
  51 cvar_t mod_noshader_default_offsetmapping = {CF_CLIENT | CF_ARCHIVE, "mod_noshader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are not using q3 shader files"};
  52 cvar_t mod_q3shader_default_offsetmapping = {CF_CLIENT | CF_ARCHIVE, "mod_q3shader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are using q3 shader files"};
  53 cvar_t mod_q3shader_default_offsetmapping_scale = {CF_CLIENT | CF_ARCHIVE, "mod_q3shader_default_offsetmapping_scale", "1", "default scale used for offsetmapping"};
  54 cvar_t mod_q3shader_default_offsetmapping_bias = {CF_CLIENT | CF_ARCHIVE, "mod_q3shader_default_offsetmapping_bias", "0", "default bias used for offsetmapping"};
  55 cvar_t mod_q3shader_default_polygonfactor = {CF_CLIENT, "mod_q3shader_default_polygonfactor", "0", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  56 cvar_t mod_q3shader_default_polygonoffset = {CF_CLIENT, "mod_q3shader_default_polygonoffset", "-2", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  57 cvar_t mod_q3shader_default_refractive_index = {CF_CLIENT, "mod_q3shader_default_refractive_index", "1.33", "angle of refraction specified as n to apply when a photon is refracted, example values are: 1.0003 = air, water = 1.333, crown glass = 1.517, flint glass = 1.655, diamond = 2.417"};
  58 cvar_t mod_q3shader_force_addalpha = {CF_CLIENT, "mod_q3shader_force_addalpha", "0", "treat GL_ONE GL_ONE (or add) blendfunc as GL_SRC_ALPHA GL_ONE for compatibility with older DarkPlaces releases"};
  59 cvar_t mod_q3shader_force_terrain_alphaflag = {CF_CLIENT, "mod_q3shader_force_terrain_alphaflag", "0", "for multilayered terrain shaders force TEXF_ALPHA flag on both layers"};
  60
  61 cvar_t mod_q2bsp_littransparentsurfaces = {CF_CLIENT, "mod_q2bsp_littransparentsurfaces", "0", "allows lighting on rain in 3v3gloom3 and other cases of transparent surfaces that have lightmaps that were ignored by quake2"};
  62
  63 cvar_t mod_q1bsp_polygoncollisions = {CF_CLIENT | CF_SERVER, "mod_q1bsp_polygoncollisions", "0", "disables use of precomputed cliphulls and instead collides with polygons (uses Bounding Interval Hierarchy optimizations)"};
  64 cvar_t mod_q1bsp_traceoutofsolid = {CF_SHARED, "mod_q1bsp_traceoutofsolid", "1", "enables tracebox to move an entity that's stuck in solid brushwork out to empty space, 1 matches FTEQW and QSS and is required by many community maps (items/monsters will be missing otherwise), 0 matches old versions of DP and the original Quake engine (if your map or QC needs 0 it's buggy)"};
  65 cvar_t mod_q1bsp_zero_hullsize_cutoff = {CF_CLIENT | CF_SERVER, "mod_q1bsp_zero_hullsize_cutoff", "3", "bboxes with an X dimension smaller than this will use the smallest cliphull (0x0x0) instead of being rounded up to the player cliphull (32x32x56) in Q1BSP, or crouching player (32x32x36) in HLBSP"};
  66
  67 cvar_t mod_bsp_portalize = {CF_CLIENT, "mod_bsp_portalize", "0", "enables portal generation from BSP tree (takes a minute or more and GBs of memory when loading a complex map), used by r_drawportals, r_useportalculling, r_shadow_realtime_dlight_portalculling, r_shadow_realtime_world_compileportalculling"};
  68 cvar_t mod_recalculatenodeboxes = {CF_CLIENT | CF_SERVER, "mod_recalculatenodeboxes", "1", "enables use of generated node bounding boxes based on BSP tree portal reconstruction, rather than the node boxes supplied by the map compiler"};
  69
  70 cvar_t mod_obj_orientation = {CF_CLIENT | CF_SERVER, "mod_obj_orientation", "1", "fix orientation of OBJ models to the usual conventions (if zero, use coordinates as is)"};
  71
  72 static texture_t mod_q1bsp_texture_solid;
  73 static texture_t mod_q1bsp_texture_sky;
  74 static texture_t mod_q1bsp_texture_lava;
  75 static texture_t mod_q1bsp_texture_slime;
  76 static texture_t mod_q1bsp_texture_water;
  77
  78 static qbool Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs);
  79
  80 void Mod_BrushInit(void)
  81 {
  82 //      Cvar_RegisterVariable(&r_subdivide_size);
  83         Cvar_RegisterVariable(&mod_bsp_portalize);
  84         Cvar_RegisterVariable(&r_novis);
  85         Cvar_RegisterVariable(&r_nosurftextures);
  86         Cvar_RegisterVariable(&r_subdivisions_tolerance);
  87         Cvar_RegisterVariable(&r_subdivisions_mintess);
  88         Cvar_RegisterVariable(&r_subdivisions_maxtess);
  89         Cvar_RegisterVariable(&r_subdivisions_maxvertices);
  90         Cvar_RegisterVariable(&mod_q3bsp_curves_subdivisions_tolerance);
  91         Cvar_RegisterVariable(&mod_q3bsp_curves_subdivisions_mintess);
  92         Cvar_RegisterVariable(&mod_q3bsp_curves_subdivisions_maxtess);
  93         Cvar_RegisterVariable(&mod_q3bsp_curves_subdivisions_maxvertices);
  94         Cvar_RegisterVariable(&r_trippy);
  95         Cvar_RegisterVariable(&mod_noshader_default_offsetmapping);
  96         Cvar_RegisterVariable(&mod_obj_orientation);
  97         Cvar_RegisterVariable(&mod_q2bsp_littransparentsurfaces);
  98         Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
  99         Cvar_RegisterVariable(&mod_q3bsp_optimizedtraceline);
 100         Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
 101         Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
 102         Cvar_RegisterVariable(&mod_q3bsp_sRGBlightmaps);
 103         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_texture);
 104         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_world_surfaces);
 105         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_bsp_surfaces);
 106         Cvar_RegisterVariable(&mod_q3bsp_tracelineofsight_brushes);
 107         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping);
 108         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_scale);
 109         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_bias);
 110         Cvar_RegisterVariable(&mod_q3shader_default_polygonfactor);
 111         Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
 112         Cvar_RegisterVariable(&mod_q3shader_default_refractive_index);
 113         Cvar_RegisterVariable(&mod_q3shader_force_addalpha);
 114         Cvar_RegisterVariable(&mod_q3shader_force_terrain_alphaflag);
 115         Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
 116         Cvar_RegisterVariable(&mod_q1bsp_traceoutofsolid);
 117         Cvar_RegisterVariable(&mod_q1bsp_zero_hullsize_cutoff);
 118         Cvar_RegisterVariable(&mod_recalculatenodeboxes);
 119
 120         // these games were made for older DP engines and are no longer
 121         // maintained; use this hack to show their textures properly
 122         if(gamemode == GAME_NEXUIZ)
 123                 Cvar_SetQuick(&mod_q3shader_force_addalpha, "1");
 124
 125         memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
 126         dp_strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
 127         mod_q1bsp_texture_solid.surfaceflags = 0;
 128         mod_q1bsp_texture_solid.supercontents = SUPERCONTENTS_SOLID;
 129
 130         mod_q1bsp_texture_sky = mod_q1bsp_texture_solid;
 131         dp_strlcpy(mod_q1bsp_texture_sky.name, "sky", sizeof(mod_q1bsp_texture_sky.name));
 132         mod_q1bsp_texture_sky.surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
 133         mod_q1bsp_texture_sky.supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP;
 134
 135         mod_q1bsp_texture_lava = mod_q1bsp_texture_solid;
 136         dp_strlcpy(mod_q1bsp_texture_lava.name, "*lava", sizeof(mod_q1bsp_texture_lava.name));
 137         mod_q1bsp_texture_lava.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 138         mod_q1bsp_texture_lava.supercontents = SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 139
 140         mod_q1bsp_texture_slime = mod_q1bsp_texture_solid;
 141         dp_strlcpy(mod_q1bsp_texture_slime.name, "*slime", sizeof(mod_q1bsp_texture_slime.name));
 142         mod_q1bsp_texture_slime.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 143         mod_q1bsp_texture_slime.supercontents = SUPERCONTENTS_SLIME;
 144
 145         mod_q1bsp_texture_water = mod_q1bsp_texture_solid;
 146         dp_strlcpy(mod_q1bsp_texture_water.name, "*water", sizeof(mod_q1bsp_texture_water.name));
 147         mod_q1bsp_texture_water.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 148         mod_q1bsp_texture_water.supercontents = SUPERCONTENTS_WATER;
 149 }
 150
 151 static mleaf_t *Mod_BSP_PointInLeaf(model_t *model, const vec3_t p)
 152 {
 153         mnode_t *node;
 154
 155         if (model == NULL)
 156                 return NULL;
 157
 158         // LadyHavoc: modified to start at first clip node,
 159         // in other words: first node of the (sub)model
 160         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 161         while (node->plane)
 162                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
 163
 164         return (mleaf_t *)node;
 165 }
 166
 167 static void Mod_Q1BSP_AmbientSoundLevelsForPoint(model_t *model, const vec3_t p, unsigned char *out, int outsize)
 168 {
 169         int i;
 170         mleaf_t *leaf;
 171         leaf = Mod_BSP_PointInLeaf(model, p);
 172         if (leaf)
 173         {
 174                 i = min(outsize, (int)sizeof(leaf->ambient_sound_level));
 175                 if (i)
 176                 {
 177                         memcpy(out, leaf->ambient_sound_level, i);
 178                         out += i;
 179                         outsize -= i;
 180                 }
 181         }
 182         if (outsize)
 183                 memset(out, 0, outsize);
 184 }
 185
 186 static int Mod_BSP_FindBoxClusters(model_t *model, const vec3_t mins, const vec3_t maxs, int maxclusters, int *clusterlist)
 187 {
 188         int numclusters = 0;
 189         int nodestackindex = 0;
 190         mnode_t *node, *nodestack[1024];
 191         if (!model->brush.num_pvsclusters)
 192                 return -1;
 193         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 194         for (;;)
 195         {
 196 #if 1
 197                 if (node->plane)
 198                 {
 199                         // node - recurse down the BSP tree
 200                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 201                         if (sides < 3)
 202                         {
 203                                 if (sides == 0)
 204                                         return -1; // ERROR: NAN bounding box!
 205                                 // box is on one side of plane, take that path
 206                                 node = node->children[sides-1];
 207                         }
 208                         else
 209                         {
 210                                 // box crosses plane, take one path and remember the other
 211                                 if (nodestackindex < 1024)
 212                                         nodestack[nodestackindex++] = node->children[0];
 213                                 node = node->children[1];
 214                         }
 215                         continue;
 216                 }
 217                 else
 218                 {
 219                         // leaf - add clusterindex to list
 220                         if (numclusters < maxclusters)
 221                                 clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 222                         numclusters++;
 223                 }
 224 #else
 225                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 226                 {
 227                         if (node->plane)
 228                         {
 229                                 if (nodestackindex < 1024)
 230                                         nodestack[nodestackindex++] = node->children[0];
 231                                 node = node->children[1];
 232                                 continue;
 233                         }
 234                         else
 235                         {
 236                                 // leaf - add clusterindex to list
 237                                 if (numclusters < maxclusters)
 238                                         clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 239                                 numclusters++;
 240                         }
 241                 }
 242 #endif
 243                 // try another path we didn't take earlier
 244                 if (nodestackindex == 0)
 245                         break;
 246                 node = nodestack[--nodestackindex];
 247         }
 248         // return number of clusters found (even if more than the maxclusters)
 249         return numclusters;
 250 }
 251
 252 static int Mod_BSP_BoxTouchingPVS(model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 253 {
 254         int nodestackindex = 0;
 255         mnode_t *node, *nodestack[1024];
 256         if (!model->brush.num_pvsclusters)
 257                 return true;
 258         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 259         for (;;)
 260         {
 261 #if 1
 262                 if (node->plane)
 263                 {
 264                         // node - recurse down the BSP tree
 265                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 266                         if (sides < 3)
 267                         {
 268                                 if (sides == 0)
 269                                         return -1; // ERROR: NAN bounding box!
 270                                 // box is on one side of plane, take that path
 271                                 node = node->children[sides-1];
 272                         }
 273                         else
 274                         {
 275                                 // box crosses plane, take one path and remember the other
 276                                 if (nodestackindex < 1024)
 277                                         nodestack[nodestackindex++] = node->children[0];
 278                                 node = node->children[1];
 279                         }
 280                         continue;
 281                 }
 282                 else
 283                 {
 284                         // leaf - check cluster bit
 285                         int clusterindex = ((mleaf_t *)node)->clusterindex;
 286                         if (CHECKPVSBIT(pvs, clusterindex))
 287                         {
 288                                 // it is visible, return immediately with the news
 289                                 return true;
 290                         }
 291                 }
 292 #else
 293                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 294                 {
 295                         if (node->plane)
 296                         {
 297                                 if (nodestackindex < 1024)
 298                                         nodestack[nodestackindex++] = node->children[0];
 299                                 node = node->children[1];
 300                                 continue;
 301                         }
 302                         else
 303                         {
 304                                 // leaf - check cluster bit
 305                                 int clusterindex = ((mleaf_t *)node)->clusterindex;
 306                                 if (CHECKPVSBIT(pvs, clusterindex))
 307                                 {
 308                                         // it is visible, return immediately with the news
 309                                         return true;
 310                                 }
 311                         }
 312                 }
 313 #endif
 314                 // nothing to see here, try another path we didn't take earlier
 315                 if (nodestackindex == 0)
 316                         break;
 317                 node = nodestack[--nodestackindex];
 318         }
 319         // it is not visible
 320         return false;
 321 }
 322
 323 static int Mod_BSP_BoxTouchingLeafPVS(model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 324 {
 325         int nodestackindex = 0;
 326         mnode_t *node, *nodestack[1024];
 327         if (!model->brush.num_leafs)
 328                 return true;
 329         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 330         for (;;)
 331         {
 332 #if 1
 333                 if (node->plane)
 334                 {
 335                         // node - recurse down the BSP tree
 336                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 337                         if (sides < 3)
 338                         {
 339                                 if (sides == 0)
 340                                         return -1; // ERROR: NAN bounding box!
 341                                 // box is on one side of plane, take that path
 342                                 node = node->children[sides-1];
 343                         }
 344                         else
 345                         {
 346                                 // box crosses plane, take one path and remember the other
 347                                 if (nodestackindex < 1024)
 348                                         nodestack[nodestackindex++] = node->children[0];
 349                                 node = node->children[1];
 350                         }
 351                         continue;
 352                 }
 353                 else
 354                 {
 355                         // leaf - check cluster bit
 356                         int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 357                         if (CHECKPVSBIT(pvs, clusterindex))
 358                         {
 359                                 // it is visible, return immediately with the news
 360                                 return true;
 361                         }
 362                 }
 363 #else
 364                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 365                 {
 366                         if (node->plane)
 367                         {
 368                                 if (nodestackindex < 1024)
 369                                         nodestack[nodestackindex++] = node->children[0];
 370                                 node = node->children[1];
 371                                 continue;
 372                         }
 373                         else
 374                         {
 375                                 // leaf - check cluster bit
 376                                 int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 377                                 if (CHECKPVSBIT(pvs, clusterindex))
 378                                 {
 379                                         // it is visible, return immediately with the news
 380                                         return true;
 381                                 }
 382                         }
 383                 }
 384 #endif
 385                 // nothing to see here, try another path we didn't take earlier
 386                 if (nodestackindex == 0)
 387                         break;
 388                 node = nodestack[--nodestackindex];
 389         }
 390         // it is not visible
 391         return false;
 392 }
 393
 394 static int Mod_BSP_BoxTouchingVisibleLeafs(model_t *model, const unsigned char *visibleleafs, const vec3_t mins, const vec3_t maxs)
 395 {
 396         int nodestackindex = 0;
 397         mnode_t *node, *nodestack[1024];
 398         if (!model->brush.num_leafs)
 399                 return true;
 400         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 401         for (;;)
 402         {
 403 #if 1
 404                 if (node->plane)
 405                 {
 406                         // node - recurse down the BSP tree
 407                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 408                         if (sides < 3)
 409                         {
 410                                 if (sides == 0)
 411                                         return -1; // ERROR: NAN bounding box!
 412                                 // box is on one side of plane, take that path
 413                                 node = node->children[sides-1];
 414                         }
 415                         else
 416                         {
 417                                 // box crosses plane, take one path and remember the other
 418                                 if (nodestackindex < 1024)
 419                                         nodestack[nodestackindex++] = node->children[0];
 420                                 node = node->children[1];
 421                         }
 422                         continue;
 423                 }
 424                 else
 425                 {
 426                         // leaf - check if it is visible
 427                         if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 428                         {
 429                                 // it is visible, return immediately with the news
 430                                 return true;
 431                         }
 432                 }
 433 #else
 434                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 435                 {
 436                         if (node->plane)
 437                         {
 438                                 if (nodestackindex < 1024)
 439                                         nodestack[nodestackindex++] = node->children[0];
 440                                 node = node->children[1];
 441                                 continue;
 442                         }
 443                         else
 444                         {
 445                                 // leaf - check if it is visible
 446                                 if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 447                                 {
 448                                         // it is visible, return immediately with the news
 449                                         return true;
 450                                 }
 451                         }
 452                 }
 453 #endif
 454                 // nothing to see here, try another path we didn't take earlier
 455                 if (nodestackindex == 0)
 456                         break;
 457                 node = nodestack[--nodestackindex];
 458         }
 459         // it is not visible
 460         return false;
 461 }
 462
 463 typedef struct findnonsolidlocationinfo_s
 464 {
 465         vec3_t center;
 466         vec3_t absmin, absmax;
 467         vec_t radius;
 468         vec3_t nudge;
 469         vec_t bestdist;
 470         model_t *model;
 471 }
 472 findnonsolidlocationinfo_t;
 473
 474 static void Mod_BSP_FindNonSolidLocation_r_Triangle(findnonsolidlocationinfo_t *info, msurface_t *surface, int k)
 475 {
 476         int i, *tri;
 477         float dist, f, vert[3][3], edge[3][3], facenormal[3], edgenormal[3][3], point[3];
 478
 479         tri = (info->model->surfmesh.data_element3i + 3 * surface->num_firsttriangle) + k * 3;
 480         VectorCopy((info->model->surfmesh.data_vertex3f + tri[0] * 3), vert[0]);
 481         VectorCopy((info->model->surfmesh.data_vertex3f + tri[1] * 3), vert[1]);
 482         VectorCopy((info->model->surfmesh.data_vertex3f + tri[2] * 3), vert[2]);
 483         VectorSubtract(vert[1], vert[0], edge[0]);
 484         VectorSubtract(vert[2], vert[1], edge[1]);
 485         CrossProduct(edge[1], edge[0], facenormal);
 486         if (facenormal[0] || facenormal[1] || facenormal[2])
 487         {
 488                 VectorNormalize(facenormal);
 489                 f = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 490                 if (f <= info->bestdist && f >= -info->bestdist)
 491                 {
 492                         VectorSubtract(vert[0], vert[2], edge[2]);
 493                         VectorNormalize(edge[0]);
 494                         VectorNormalize(edge[1]);
 495                         VectorNormalize(edge[2]);
 496                         CrossProduct(facenormal, edge[0], edgenormal[0]);
 497                         CrossProduct(facenormal, edge[1], edgenormal[1]);
 498                         CrossProduct(facenormal, edge[2], edgenormal[2]);
 499                         // face distance
 500                         if (DotProduct(info->center, edgenormal[0]) < DotProduct(vert[0], edgenormal[0])
 501                                         && DotProduct(info->center, edgenormal[1]) < DotProduct(vert[1], edgenormal[1])
 502                                         && DotProduct(info->center, edgenormal[2]) < DotProduct(vert[2], edgenormal[2]))
 503                         {
 504                                 // we got lucky, the center is within the face
 505                                 dist = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 506                                 if (dist < 0)
 507                                 {
 508                                         dist = -dist;
 509                                         if (info->bestdist > dist)
 510                                         {
 511                                                 info->bestdist = dist;
 512                                                 VectorScale(facenormal, (info->radius - -dist), info->nudge);
 513                                         }
 514                                 }
 515                                 else
 516                                 {
 517                                         if (info->bestdist > dist)
 518                                         {
 519                                                 info->bestdist = dist;
 520                                                 VectorScale(facenormal, (info->radius - dist), info->nudge);
 521                                         }
 522                                 }
 523                         }
 524                         else
 525                         {
 526                                 // check which edge or vertex the center is nearest
 527                                 for (i = 0;i < 3;i++)
 528                                 {
 529                                         f = DotProduct(info->center, edge[i]);
 530                                         if (f >= DotProduct(vert[0], edge[i])
 531                                                         && f <= DotProduct(vert[1], edge[i]))
 532                                         {
 533                                                 // on edge
 534                                                 VectorMA(info->center, -f, edge[i], point);
 535                                                 dist = sqrt(DotProduct(point, point));
 536                                                 if (info->bestdist > dist)
 537                                                 {
 538                                                         info->bestdist = dist;
 539                                                         VectorScale(point, (info->radius / dist), info->nudge);
 540                                                 }
 541                                                 // skip both vertex checks
 542                                                 // (both are further away than this edge)
 543                                                 i++;
 544                                         }
 545                                         else
 546                                         {
 547                                                 // not on edge, check first vertex of edge
 548                                                 VectorSubtract(info->center, vert[i], point);
 549                                                 dist = sqrt(DotProduct(point, point));
 550                                                 if (info->bestdist > dist)
 551                                                 {
 552                                                         info->bestdist = dist;
 553                                                         VectorScale(point, (info->radius / dist), info->nudge);
 554                                                 }
 555                                         }
 556                                 }
 557                         }
 558                 }
 559         }
 560 }
 561
 562 static void Mod_BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *info, mleaf_t *leaf)
 563 {
 564         int surfacenum, k, *mark;
 565         msurface_t *surface;
 566         for (surfacenum = 0, mark = leaf->firstleafsurface;surfacenum < leaf->numleafsurfaces;surfacenum++, mark++)
 567         {
 568                 surface = info->model->data_surfaces + *mark;
 569                 if(!surface->texture)
 570                         continue;
 571                 if (surface->texture->supercontents & SUPERCONTENTS_SOLID)
 572                 {
 573                         for (k = 0;k < surface->num_triangles;k++)
 574                         {
 575                                 Mod_BSP_FindNonSolidLocation_r_Triangle(info, surface, k);
 576                         }
 577                 }
 578         }
 579 }
 580
 581 static void Mod_BSP_FindNonSolidLocation_r(findnonsolidlocationinfo_t *info, mnode_t *node)
 582 {
 583         if (node->plane)
 584         {
 585                 float f = PlaneDiff(info->center, node->plane);
 586                 if (f >= -info->bestdist)
 587                         Mod_BSP_FindNonSolidLocation_r(info, node->children[0]);
 588                 if (f <= info->bestdist)
 589                         Mod_BSP_FindNonSolidLocation_r(info, node->children[1]);
 590         }
 591         else
 592         {
 593                 if (((mleaf_t *)node)->numleafsurfaces)
 594                         Mod_BSP_FindNonSolidLocation_r_Leaf(info, (mleaf_t *)node);
 595         }
 596 }
 597
 598 static void Mod_BSP_FindNonSolidLocation(model_t *model, const vec3_t in, vec3_t out, float radius)
 599 {
 600         int i;
 601         findnonsolidlocationinfo_t info;
 602         if (model == NULL)
 603         {
 604                 VectorCopy(in, out);
 605                 return;
 606         }
 607         VectorCopy(in, info.center);
 608         info.radius = radius;
 609         info.model = model;
 610         i = 0;
 611         do
 612         {
 613                 VectorClear(info.nudge);
 614                 info.bestdist = radius;
 615                 VectorCopy(info.center, info.absmin);
 616                 VectorCopy(info.center, info.absmax);
 617                 info.absmin[0] -= info.radius + 1;
 618                 info.absmin[1] -= info.radius + 1;
 619                 info.absmin[2] -= info.radius + 1;
 620                 info.absmax[0] += info.radius + 1;
 621                 info.absmax[1] += info.radius + 1;
 622                 info.absmax[2] += info.radius + 1;
 623                 Mod_BSP_FindNonSolidLocation_r(&info, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
 624                 VectorAdd(info.center, info.nudge, info.center);
 625         }
 626         while (info.bestdist < radius && ++i < 10);
 627         VectorCopy(info.center, out);
 628 }
 629
 630 int Mod_Q1BSP_SuperContentsFromNativeContents(int nativecontents)
 631 {
 632         switch(nativecontents)
 633         {
 634                 case CONTENTS_EMPTY:
 635                         return 0;
 636                 case CONTENTS_SOLID:
 637                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
 638                 case CONTENTS_WATER:
 639                         return SUPERCONTENTS_WATER;
 640                 case CONTENTS_SLIME:
 641                         return SUPERCONTENTS_SLIME;
 642                 case CONTENTS_LAVA:
 643                         return SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 644                 case CONTENTS_SKY:
 645                         return SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE; // to match behaviour of Q3 maps, let sky count as opaque
 646         }
 647         return 0;
 648 }
 649
 650 int Mod_Q1BSP_NativeContentsFromSuperContents(int supercontents)
 651 {
 652         if (supercontents & (SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY))
 653                 return CONTENTS_SOLID;
 654         if (supercontents & SUPERCONTENTS_SKY)
 655                 return CONTENTS_SKY;
 656         if (supercontents & SUPERCONTENTS_LAVA)
 657                 return CONTENTS_LAVA;
 658         if (supercontents & SUPERCONTENTS_SLIME)
 659                 return CONTENTS_SLIME;
 660         if (supercontents & SUPERCONTENTS_WATER)
 661                 return CONTENTS_WATER;
 662         return CONTENTS_EMPTY;
 663 }
 664
 665 typedef struct RecursiveHullCheckTraceInfo_s
 666 {
 667         // the hull we're tracing through
 668         const hull_t *hull;
 669
 670         // the trace structure to fill in
 671         trace_t *trace;
 672
 673         // start, end, and end - start (in model space)
 674         double start[3];
 675         double end[3];
 676         double dist[3];
 677 }
 678 RecursiveHullCheckTraceInfo_t;
 679
 680 // 1/32 epsilon to keep floating point happy
 681 #define DIST_EPSILON (0.03125)
 682
 683 #define HULLCHECKSTATE_EMPTY 0
 684 #define HULLCHECKSTATE_SOLID 1
 685 #define HULLCHECKSTATE_DONE 2
 686
 687 static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int num, double p1f, double p2f, double p1[3], double p2[3])
 688 {
 689         // status variables, these don't need to be saved on the stack when
 690         // recursing...  but are because this should be thread-safe
 691         // (note: tracing against a bbox is not thread-safe, yet)
 692         int ret;
 693         mplane_t *plane;
 694         double t1, t2;
 695
 696         // variables that need to be stored on the stack when recursing
 697         mclipnode_t *node;
 698         int p1side, p2side;
 699         double midf, mid[3];
 700
 701         // keep looping until we hit a leaf
 702         while (num >= 0)
 703         {
 704                 // find the point distances
 705                 node = t->hull->clipnodes + num;
 706                 plane = t->hull->planes + node->planenum;
 707
 708                 // axial planes can be calculated more quickly without the DotProduct
 709                 if (plane->type < 3)
 710                 {
 711                         t1 = p1[plane->type] - plane->dist;
 712                         t2 = p2[plane->type] - plane->dist;
 713                 }
 714                 else
 715                 {
 716                         t1 = DotProduct (plane->normal, p1) - plane->dist;
 717                         t2 = DotProduct (plane->normal, p2) - plane->dist;
 718                 }
 719
 720                 // negative plane distances indicate children[1] (behind plane)
 721                 p1side = t1 < 0;
 722                 p2side = t2 < 0;
 723
 724                 // if the line starts and ends on the same side of the plane, recurse
 725                 // into that child instantly
 726                 if (p1side == p2side)
 727                 {
 728 #if COLLISIONPARANOID >= 3
 729                         if (p1side)
 730                                 Con_Print("<");
 731                         else
 732                                 Con_Print(">");
 733 #endif
 734                         // loop back and process the start child
 735                         num = node->children[p1side];
 736                 }
 737                 else
 738                 {
 739                         // find the midpoint where the line crosses the plane, use the
 740                         // original line for best accuracy
 741 #if COLLISIONPARANOID >= 3
 742                         Con_Print("M");
 743 #endif
 744                         if (plane->type < 3)
 745                         {
 746                                 t1 = t->start[plane->type] - plane->dist;
 747                                 t2 = t->end[plane->type] - plane->dist;
 748                         }
 749                         else
 750                         {
 751                                 t1 = DotProduct (plane->normal, t->start) - plane->dist;
 752                                 t2 = DotProduct (plane->normal, t->end) - plane->dist;
 753                         }
 754                         midf = t1 / (t1 - t2);
 755                         midf = bound(p1f, midf, p2f);
 756                         VectorMA(t->start, midf, t->dist, mid);
 757
 758                         // we now have a mid point, essentially splitting the line into
 759                         // the segments in the near child and the far child, we can now
 760                         // recurse those in order and get their results
 761
 762                         // recurse both sides, front side first
 763                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p1side], p1f, midf, p1, mid);
 764                         // if this side is not empty, return what it is (solid or done)
 765                         if (ret != HULLCHECKSTATE_EMPTY && (!t->trace->allsolid || !mod_q1bsp_traceoutofsolid.integer))
 766                                 return ret;
 767
 768                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p2side], midf, p2f, mid, p2);
 769                         // if other side is not solid, return what it is (empty or done)
 770                         if (ret != HULLCHECKSTATE_SOLID)
 771                                 return ret;
 772
 773                         // front is air and back is solid, this is the impact point...
 774
 775                         // copy the plane information, flipping it if needed
 776                         if (p1side)
 777                         {
 778                                 t->trace->plane.dist = -plane->dist;
 779                                 VectorNegate (plane->normal, t->trace->plane.normal);
 780                         }
 781                         else
 782                         {
 783                                 t->trace->plane.dist = plane->dist;
 784                                 VectorCopy (plane->normal, t->trace->plane.normal);
 785                         }
 786
 787                         // calculate the return fraction which is nudged off the surface a bit
 788                         t1 = DotProduct(t->trace->plane.normal, t->start) - t->trace->plane.dist;
 789                         t2 = DotProduct(t->trace->plane.normal, t->end) - t->trace->plane.dist;
 790                         midf = (t1 - collision_impactnudge.value) / (t1 - t2);
 791                         t->trace->fraction = bound(0, midf, 1);
 792
 793 #if COLLISIONPARANOID >= 3
 794                         Con_Print("D");
 795 #endif
 796                         return HULLCHECKSTATE_DONE;
 797                 }
 798         }
 799
 800         // we reached a leaf contents
 801
 802         // check for empty
 803         num = Mod_Q1BSP_SuperContentsFromNativeContents(num);
 804         if (!t->trace->startfound)
 805         {
 806                 t->trace->startfound = true;
 807                 t->trace->startsupercontents |= num;
 808         }
 809         if (num & SUPERCONTENTS_LIQUIDSMASK)
 810                 t->trace->inwater = true;
 811         if (num == 0)
 812                 t->trace->inopen = true;
 813         if (num & SUPERCONTENTS_SOLID)
 814                 t->trace->hittexture = &mod_q1bsp_texture_solid;
 815         else if (num & SUPERCONTENTS_SKY)
 816                 t->trace->hittexture = &mod_q1bsp_texture_sky;
 817         else if (num & SUPERCONTENTS_LAVA)
 818                 t->trace->hittexture = &mod_q1bsp_texture_lava;
 819         else if (num & SUPERCONTENTS_SLIME)
 820                 t->trace->hittexture = &mod_q1bsp_texture_slime;
 821         else
 822                 t->trace->hittexture = &mod_q1bsp_texture_water;
 823         t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
 824         t->trace->hitsupercontents = num;
 825         if (num & t->trace->hitsupercontentsmask)
 826         {
 827                 // if the first leaf is solid, set startsolid
 828                 if (t->trace->allsolid)
 829                         t->trace->startsolid = true;
 830 #if COLLISIONPARANOID >= 3
 831                 Con_Print("S");
 832 #endif
 833                 return HULLCHECKSTATE_SOLID;
 834         }
 835         else
 836         {
 837                 t->trace->allsolid = false;
 838 #if COLLISIONPARANOID >= 3
 839                 Con_Print("E");
 840 #endif
 841                 return HULLCHECKSTATE_EMPTY;
 842         }
 843 }
 844
 845 //#if COLLISIONPARANOID < 2
 846 static int Mod_Q1BSP_RecursiveHullCheckPoint(RecursiveHullCheckTraceInfo_t *t, int num)
 847 {
 848         mplane_t *plane;
 849         mclipnode_t *nodes = t->hull->clipnodes;
 850         mplane_t *planes = t->hull->planes;
 851         vec3_t point;
 852         VectorCopy(t->start, point);
 853         while (num >= 0)
 854         {
 855                 plane = planes + nodes[num].planenum;
 856                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
 857         }
 858         num = Mod_Q1BSP_SuperContentsFromNativeContents(num);
 859         t->trace->startsupercontents |= num;
 860         if (num & SUPERCONTENTS_LIQUIDSMASK)
 861                 t->trace->inwater = true;
 862         if (num == 0)
 863                 t->trace->inopen = true;
 864         if (num & t->trace->hitsupercontentsmask)
 865         {
 866                 t->trace->allsolid = t->trace->startsolid = true;
 867                 return HULLCHECKSTATE_SOLID;
 868         }
 869         else
 870         {
 871                 t->trace->allsolid = t->trace->startsolid = false;
 872                 return HULLCHECKSTATE_EMPTY;
 873         }
 874 }
 875 //#endif
 876
 877 static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 878 {
 879         RecursiveHullCheckTraceInfo_t rhc;
 880
 881         memset(&rhc, 0, sizeof(rhc));
 882         memset(trace, 0, sizeof(trace_t));
 883         rhc.trace = trace;
 884         rhc.trace->fraction = 1;
 885         rhc.trace->allsolid = true;
 886         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 887         VectorCopy(start, rhc.start);
 888         VectorCopy(start, rhc.end);
 889         Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 890 }
 891
 892 static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
 893
 894 static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 895 {
 896         RecursiveHullCheckTraceInfo_t rhc;
 897
 898         if (VectorCompare(start, end))
 899         {
 900                 Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 901                 return;
 902         }
 903
 904         // sometimes we want to traceline against polygons so we can report the texture that was hit rather than merely a contents, but using this method breaks one of negke's maps so it must be a cvar check...
 905         if (sv_gameplayfix_q1bsptracelinereportstexture.integer)
 906         {
 907                 Mod_Q1BSP_TraceLineAgainstSurfaces(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 908                 return;
 909         }
 910
 911         memset(&rhc, 0, sizeof(rhc));
 912         memset(trace, 0, sizeof(trace_t));
 913         rhc.trace = trace;
 914         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 915         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 916         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 917         rhc.trace->fraction = 1;
 918         rhc.trace->allsolid = true;
 919         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 920         VectorCopy(start, rhc.start);
 921         VectorCopy(end, rhc.end);
 922         VectorSubtract(rhc.end, rhc.start, rhc.dist);
 923 #if COLLISIONPARANOID >= 2
 924         Con_Printf("t(%f %f %f,%f %f %f)", rhc.start[0], rhc.start[1], rhc.start[2], rhc.end[0], rhc.end[1], rhc.end[2]);
 925         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 926         {
 927
 928                 double test[3];
 929                 trace_t testtrace;
 930                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
 931                 memset(&testtrace, 0, sizeof(trace_t));
 932                 rhc.trace = &testtrace;
 933                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 934                 rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 935                 rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 936                 rhc.trace->fraction = 1;
 937                 rhc.trace->allsolid = true;
 938                 VectorCopy(test, rhc.start);
 939                 VectorCopy(test, rhc.end);
 940                 VectorClear(rhc.dist);
 941                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 942                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
 943                 if (!trace->startsolid && testtrace.startsolid)
 944                         Con_Printf(" - ended in solid!\n");
 945         }
 946         Con_Print("\n");
 947 #else
 948         if (VectorLength2(rhc.dist))
 949                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 950         else
 951                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 952 #endif
 953 }
 954
 955 static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 956 {
 957         // this function currently only supports same size start and end
 958         double boxsize[3];
 959         RecursiveHullCheckTraceInfo_t rhc;
 960
 961         if (VectorCompare(boxmins, boxmaxs))
 962         {
 963                 if (VectorCompare(start, end))
 964                         Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 965                 else
 966                         Mod_Q1BSP_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 967                 return;
 968         }
 969
 970         memset(&rhc, 0, sizeof(rhc));
 971         memset(trace, 0, sizeof(trace_t));
 972         rhc.trace = trace;
 973         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 974         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 975         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 976         rhc.trace->fraction = 1;
 977         rhc.trace->allsolid = true;
 978         VectorSubtract(boxmaxs, boxmins, boxsize);
 979         if (boxsize[0] < mod_q1bsp_zero_hullsize_cutoff.value)
 980                 rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 981         else if (model->brush.ishlbsp)
 982         {
 983                 // LadyHavoc: this has to have a minor tolerance (the .1) because of
 984                 // minor float precision errors from the box being transformed around
 985                 if (boxsize[0] < 32.1)
 986                 {
 987                         if (boxsize[2] < 54) // pick the nearest of 36 or 72
 988                                 rhc.hull = &model->brushq1.hulls[3]; // 32x32x36
 989                         else
 990                                 rhc.hull = &model->brushq1.hulls[1]; // 32x32x72
 991                 }
 992                 else
 993                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x64
 994         }
 995         else
 996         {
 997                 // LadyHavoc: this has to have a minor tolerance (the .1) because of
 998                 // minor float precision errors from the box being transformed around
 999                 if (boxsize[0] < 32.1)
1000                         rhc.hull = &model->brushq1.hulls[1]; // 32x32x56
1001                 else
1002                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x88
1003         }
1004         VectorMAMAM(1, start, 1, boxmins, -1, rhc.hull->clip_mins, rhc.start);
1005         VectorMAMAM(1, end, 1, boxmins, -1, rhc.hull->clip_mins, rhc.end);
1006         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1007 #if COLLISIONPARANOID >= 2
1008         Con_Printf("t(%f %f %f,%f %f %f,%li %f %f %f)", rhc.start[0], rhc.start[1], rhc.start[2], rhc.end[0], rhc.end[1], rhc.end[2], rhc.hull - model->brushq1.hulls, rhc.hull->clip_mins[0], rhc.hull->clip_mins[1], rhc.hull->clip_mins[2]);
1009         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1010         {
1011
1012                 double test[3];
1013                 trace_t testtrace;
1014                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
1015                 memset(&testtrace, 0, sizeof(trace_t));
1016                 rhc.trace = &testtrace;
1017                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1018                 rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1019                 rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1020                 rhc.trace->fraction = 1;
1021                 rhc.trace->allsolid = true;
1022                 VectorCopy(test, rhc.start);
1023                 VectorCopy(test, rhc.end);
1024                 VectorClear(rhc.dist);
1025                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1026                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
1027                 if (!trace->startsolid && testtrace.startsolid)
1028                         Con_Printf(" - ended in solid!\n");
1029         }
1030         Con_Print("\n");
1031 #else
1032         if (VectorLength2(rhc.dist))
1033                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1034         else
1035                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1036 #endif
1037 }
1038
1039 static int Mod_Q1BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
1040 {
1041         int num = model->brushq1.hulls[0].firstclipnode;
1042         mplane_t *plane;
1043         mclipnode_t *nodes = model->brushq1.hulls[0].clipnodes;
1044         mplane_t *planes = model->brushq1.hulls[0].planes;
1045         while (num >= 0)
1046         {
1047                 plane = planes + nodes[num].planenum;
1048                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
1049         }
1050         return Mod_Q1BSP_SuperContentsFromNativeContents(num);
1051 }
1052
1053 void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
1054 {
1055 #if 1
1056         colbrushf_t cbox;
1057         colplanef_t cbox_planes[6];
1058         cbox.isaabb = true;
1059         cbox.hasaabbplanes = true;
1060         cbox.supercontents = boxsupercontents;
1061         cbox.numplanes = 6;
1062         cbox.numpoints = 0;
1063         cbox.numtriangles = 0;
1064         cbox.planes = cbox_planes;
1065         cbox.points = NULL;
1066         cbox.elements = NULL;
1067         cbox.markframe = 0;
1068         cbox.mins[0] = 0;
1069         cbox.mins[1] = 0;
1070         cbox.mins[2] = 0;
1071         cbox.maxs[0] = 0;
1072         cbox.maxs[1] = 0;
1073         cbox.maxs[2] = 0;
1074         cbox_planes[0].normal[0] =  1;cbox_planes[0].normal[1] =  0;cbox_planes[0].normal[2] =  0;cbox_planes[0].dist = cmaxs[0] - mins[0];
1075         cbox_planes[1].normal[0] = -1;cbox_planes[1].normal[1] =  0;cbox_planes[1].normal[2] =  0;cbox_planes[1].dist = maxs[0] - cmins[0];
1076         cbox_planes[2].normal[0] =  0;cbox_planes[2].normal[1] =  1;cbox_planes[2].normal[2] =  0;cbox_planes[2].dist = cmaxs[1] - mins[1];
1077         cbox_planes[3].normal[0] =  0;cbox_planes[3].normal[1] = -1;cbox_planes[3].normal[2] =  0;cbox_planes[3].dist = maxs[1] - cmins[1];
1078         cbox_planes[4].normal[0] =  0;cbox_planes[4].normal[1] =  0;cbox_planes[4].normal[2] =  1;cbox_planes[4].dist = cmaxs[2] - mins[2];
1079         cbox_planes[5].normal[0] =  0;cbox_planes[5].normal[1] =  0;cbox_planes[5].normal[2] = -1;cbox_planes[5].dist = maxs[2] - cmins[2];
1080         cbox_planes[0].q3surfaceflags = boxq3surfaceflags;cbox_planes[0].texture = boxtexture;
1081         cbox_planes[1].q3surfaceflags = boxq3surfaceflags;cbox_planes[1].texture = boxtexture;
1082         cbox_planes[2].q3surfaceflags = boxq3surfaceflags;cbox_planes[2].texture = boxtexture;
1083         cbox_planes[3].q3surfaceflags = boxq3surfaceflags;cbox_planes[3].texture = boxtexture;
1084         cbox_planes[4].q3surfaceflags = boxq3surfaceflags;cbox_planes[4].texture = boxtexture;
1085         cbox_planes[5].q3surfaceflags = boxq3surfaceflags;cbox_planes[5].texture = boxtexture;
1086         memset(trace, 0, sizeof(trace_t));
1087         trace->hitsupercontentsmask = hitsupercontentsmask;
1088         trace->skipsupercontentsmask = skipsupercontentsmask;
1089         trace->skipmaterialflagsmask = skipmaterialflagsmask;
1090         trace->fraction = 1;
1091         Collision_TraceLineBrushFloat(trace, start, end, &cbox, &cbox);
1092 #else
1093         RecursiveHullCheckTraceInfo_t rhc;
1094         static hull_t box_hull;
1095         static mclipnode_t box_clipnodes[6];
1096         static mplane_t box_planes[6];
1097         // fill in a default trace
1098         memset(&rhc, 0, sizeof(rhc));
1099         memset(trace, 0, sizeof(trace_t));
1100         //To keep everything totally uniform, bounding boxes are turned into small
1101         //BSP trees instead of being compared directly.
1102         // create a temp hull from bounding box sizes
1103         box_planes[0].dist = cmaxs[0] - mins[0];
1104         box_planes[1].dist = cmins[0] - maxs[0];
1105         box_planes[2].dist = cmaxs[1] - mins[1];
1106         box_planes[3].dist = cmins[1] - maxs[1];
1107         box_planes[4].dist = cmaxs[2] - mins[2];
1108         box_planes[5].dist = cmins[2] - maxs[2];
1109 #if COLLISIONPARANOID >= 3
1110         Con_Printf("box_planes %f:%f %f:%f %f:%f\ncbox %f %f %f:%f %f %f\nbox %f %f %f:%f %f %f\n", box_planes[0].dist, box_planes[1].dist, box_planes[2].dist, box_planes[3].dist, box_planes[4].dist, box_planes[5].dist, cmins[0], cmins[1], cmins[2], cmaxs[0], cmaxs[1], cmaxs[2], mins[0], mins[1], mins[2], maxs[0], maxs[1], maxs[2]);
1111 #endif
1112
1113         if (box_hull.clipnodes == NULL)
1114         {
1115                 int i, side;
1116
1117                 //Set up the planes and clipnodes so that the six floats of a bounding box
1118                 //can just be stored out and get a proper hull_t structure.
1119
1120                 box_hull.clipnodes = box_clipnodes;
1121                 box_hull.planes = box_planes;
1122                 box_hull.firstclipnode = 0;
1123                 box_hull.lastclipnode = 5;
1124
1125                 for (i = 0;i < 6;i++)
1126                 {
1127                         box_clipnodes[i].planenum = i;
1128
1129                         side = i&1;
1130
1131                         box_clipnodes[i].children[side] = CONTENTS_EMPTY;
1132                         if (i != 5)
1133                                 box_clipnodes[i].children[side^1] = i + 1;
1134                         else
1135                                 box_clipnodes[i].children[side^1] = CONTENTS_SOLID;
1136
1137                         box_planes[i].type = i>>1;
1138                         box_planes[i].normal[i>>1] = 1;
1139                 }
1140         }
1141
1142         // trace a line through the generated clipping hull
1143         //rhc.boxsupercontents = boxsupercontents;
1144         rhc.hull = &box_hull;
1145         rhc.trace = trace;
1146         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1147         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1148         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1149         rhc.trace->fraction = 1;
1150         rhc.trace->allsolid = true;
1151         VectorCopy(start, rhc.start);
1152         VectorCopy(end, rhc.end);
1153         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1154         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1155         //VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1156         if (rhc.trace->startsupercontents)
1157                 rhc.trace->startsupercontents = boxsupercontents;
1158 #endif
1159 }
1160
1161 void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
1162 {
1163         memset(trace, 0, sizeof(trace_t));
1164         trace->fraction = 1;
1165         trace->hitsupercontentsmask = hitsupercontentsmask;
1166         trace->skipsupercontentsmask = skipsupercontentsmask;
1167         trace->skipmaterialflagsmask = skipmaterialflagsmask;
1168         if (BoxesOverlap(start, start, cmins, cmaxs))
1169         {
1170                 trace->startsupercontents |= boxsupercontents;
1171                 if ((hitsupercontentsmask & boxsupercontents) && !(skipsupercontentsmask & boxsupercontents))
1172                 {
1173                         trace->startsolid = true;
1174                         trace->allsolid = true;
1175                 }
1176         }
1177 }
1178
1179 static qbool Mod_Q1BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
1180 {
1181         trace_t trace;
1182         Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
1183         return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
1184 }
1185
1186 static int Mod_BSP_LightPoint_RecursiveBSPNode(model_t *model, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal, const mnode_t *node, float x, float y, float startz, float endz)
1187 {
1188         int side;
1189         float front, back;
1190         float mid, distz = endz - startz;
1191
1192         while (node->plane)
1193         {
1194                 switch (node->plane->type)
1195                 {
1196                 case PLANE_X:
1197                         node = node->children[x < node->plane->dist];
1198                         continue; // loop back and process the new node
1199                 case PLANE_Y:
1200                         node = node->children[y < node->plane->dist];
1201                         continue; // loop back and process the new node
1202                 case PLANE_Z:
1203                         side = startz < node->plane->dist;
1204                         if ((endz < node->plane->dist) == side)
1205                         {
1206                                 node = node->children[side];
1207                                 continue; // loop back and process the new node
1208                         }
1209                         // found an intersection
1210                         mid = node->plane->dist;
1211                         break;
1212                 default:
1213                         back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
1214                         front += startz * node->plane->normal[2];
1215                         back += endz * node->plane->normal[2];
1216                         side = front < node->plane->dist;
1217                         if ((back < node->plane->dist) == side)
1218                         {
1219                                 node = node->children[side];
1220                                 continue; // loop back and process the new node
1221                         }
1222                         // found an intersection
1223                         mid = startz + distz * (front - node->plane->dist) / (front - back);
1224                         break;
1225                 }
1226
1227                 // go down front side
1228                 if (node->children[side]->plane && Mod_BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, node->children[side], x, y, startz, mid))
1229                         return true;    // hit something
1230
1231                 // check for impact on this node
1232                 if (node->numsurfaces)
1233                 {
1234                         unsigned int i;
1235                         int dsi, dti, lmwidth, lmheight;
1236                         float ds, dt;
1237                         msurface_t *surface;
1238                         unsigned char *lightmap;
1239                         int maps, line3, size3;
1240                         float dsfrac;
1241                         float dtfrac;
1242                         float scale, w, w00, w01, w10, w11;
1243
1244                         surface = model->data_surfaces + node->firstsurface;
1245                         for (i = 0;i < node->numsurfaces;i++, surface++)
1246                         {
1247                                 if(!surface->texture)
1248                                         continue;
1249                                 if (!(surface->texture->basematerialflags & MATERIALFLAG_WALL) || !surface->lightmapinfo || !surface->lightmapinfo->samples)
1250                                         continue;       // no lightmaps
1251
1252                                 // location we want to sample in the lightmap
1253                                 ds = ((x * surface->lightmapinfo->texinfo->vecs[0][0] + y * surface->lightmapinfo->texinfo->vecs[0][1] + mid * surface->lightmapinfo->texinfo->vecs[0][2] + surface->lightmapinfo->texinfo->vecs[0][3]) - surface->lightmapinfo->texturemins[0]) * 0.0625f;
1254                                 dt = ((x * surface->lightmapinfo->texinfo->vecs[1][0] + y * surface->lightmapinfo->texinfo->vecs[1][1] + mid * surface->lightmapinfo->texinfo->vecs[1][2] + surface->lightmapinfo->texinfo->vecs[1][3]) - surface->lightmapinfo->texturemins[1]) * 0.0625f;
1255
1256                                 // check the bounds
1257                                 // thanks to jitspoe for pointing out that this int cast was
1258                                 // rounding toward zero, so we floor it
1259                                 dsi = (int)floor(ds);
1260                                 dti = (int)floor(dt);
1261                                 lmwidth = ((surface->lightmapinfo->extents[0]>>4)+1);
1262                                 lmheight = ((surface->lightmapinfo->extents[1]>>4)+1);
1263
1264                                 // is it in bounds?
1265                                 // we have to tolerate a position of lmwidth-1 for some rare
1266                                 // cases - in which case the sampling position still gets
1267                                 // clamped but the color gets interpolated to that edge.
1268                                 if (dsi >= 0 && dsi < lmwidth && dti >= 0 && dti < lmheight)
1269                                 {
1270                                         // in the rare cases where we're sampling slightly off
1271                                         // the polygon, clamp the sampling position (we can still
1272                                         // interpolate outside it, where it becomes extrapolation)
1273                                         if (dsi < 0)
1274                                                 dsi = 0;
1275                                         if (dti < 0)
1276                                                 dti = 0;
1277                                         if (dsi > lmwidth-2)
1278                                                 dsi = lmwidth-2;
1279                                         if (dti > lmheight-2)
1280                                                 dti = lmheight-2;
1281
1282                                         // calculate bilinear interpolation factors
1283                                         // and also multiply by fixedpoint conversion factors to
1284                                         // compensate for lightmaps being 0-255 (as 0-2), we use
1285                                         // r_refdef.scene.rtlightstylevalue here which is already
1286                                         // 0.000-2.148 range
1287                                         // (if we used r_refdef.scene.lightstylevalue this
1288                                         //  divisor would be 32768 rather than 128)
1289                                         dsfrac = ds - dsi;
1290                                         dtfrac = dt - dti;
1291                                         w00 = (1 - dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1292                                         w01 = (    dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1293                                         w10 = (1 - dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1294                                         w11 = (    dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1295
1296                                         // values for pointer math
1297                                         line3 = lmwidth * 3; // LadyHavoc: *3 for colored lighting
1298                                         size3 = lmwidth * lmheight * 3; // LadyHavoc: *3 for colored lighting
1299
1300                                         // look up the pixel
1301                                         lightmap = surface->lightmapinfo->samples + dti * line3 + dsi*3; // LadyHavoc: *3 for colored lighting
1302
1303                                         // bilinear filter each lightmap style, and sum them
1304                                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++)
1305                                         {
1306                                                 scale = r_refdef.scene.rtlightstylevalue[surface->lightmapinfo->styles[maps]];
1307                                                 w = w00 * scale;VectorMA(ambientcolor, w, lightmap            , ambientcolor);
1308                                                 w = w01 * scale;VectorMA(ambientcolor, w, lightmap + 3        , ambientcolor);
1309                                                 w = w10 * scale;VectorMA(ambientcolor, w, lightmap + line3    , ambientcolor);
1310                                                 w = w11 * scale;VectorMA(ambientcolor, w, lightmap + line3 + 3, ambientcolor);
1311                                                 lightmap += size3;
1312                                         }
1313
1314                                         return true; // success
1315                                 }
1316                         }
1317                 }
1318
1319                 // go down back side
1320                 node = node->children[side ^ 1];
1321                 startz = mid;
1322                 distz = endz - startz;
1323                 // loop back and process the new node
1324         }
1325
1326         // did not hit anything
1327         return false;
1328 }
1329
1330 static void Mod_BSP_LightPoint(model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
1331 {
1332         // pretend lighting is coming down from above (due to lack of a lightgrid to know primary lighting direction)
1333         VectorSet(diffusenormal, 0, 0, 1);
1334
1335         if (!model->brushq1.lightdata)
1336         {
1337                 VectorSet(ambientcolor, 1, 1, 1);
1338                 VectorSet(diffusecolor, 0, 0, 0);
1339                 return;
1340         }
1341
1342         Mod_BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, p[0], p[1], p[2] + 0.125, p[2] - 65536);
1343 }
1344
1345 static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const model_t *model, const mnode_t *node, double mid[3])
1346 {
1347         unsigned int i;
1348         int j;
1349         int k;
1350         const msurface_t *surface;
1351         float normal[3];
1352         float v0[3];
1353         float v1[3];
1354         float edgedir[3];
1355         float edgenormal[3];
1356         float p[4];
1357         float midf;
1358         float t1;
1359         float t2;
1360         VectorCopy(mid, p);
1361         p[3] = 1;
1362         surface = model->data_surfaces + node->firstsurface;
1363         for (i = 0;i < node->numsurfaces;i++, surface++)
1364         {
1365                 if(!surface->texture)
1366                         continue;
1367                 // skip surfaces whose bounding box does not include the point
1368 //              if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
1369 //                      continue;
1370                 // skip faces with contents we don't care about
1371                 if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
1372                         continue;
1373                 // ignore surfaces matching the skipsupercontentsmask (this is rare)
1374                 if (t->trace->skipsupercontentsmask & surface->texture->supercontents)
1375                         continue;
1376                 // skip surfaces matching the skipmaterialflagsmask (e.g. MATERIALFLAG_NOSHADOW)
1377                 if (t->trace->skipmaterialflagsmask & surface->texture->currentmaterialflags)
1378                         continue;
1379                 // get the surface normal - since it is flat we know any vertex normal will suffice
1380                 VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
1381                 // skip backfaces
1382                 if (DotProduct(t->dist, normal) > 0)
1383                         continue;
1384                 // iterate edges and see if the point is outside one of them
1385                 for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
1386                 {
1387                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
1388                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
1389                         VectorSubtract(v0, v1, edgedir);
1390                         CrossProduct(edgedir, normal, edgenormal);
1391                         if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
1392                                 break;
1393                 }
1394                 // if the point is outside one of the edges, it is not within the surface
1395                 if (j < surface->num_vertices)
1396                         continue;
1397
1398                 // we hit a surface, this is the impact point...
1399                 VectorCopy(normal, t->trace->plane.normal);
1400                 t->trace->plane.dist = DotProduct(normal, p);
1401
1402                 // calculate the return fraction which is nudged off the surface a bit
1403                 t1 = DotProduct(t->start, t->trace->plane.normal) - t->trace->plane.dist;
1404                 t2 = DotProduct(t->end, t->trace->plane.normal) - t->trace->plane.dist;
1405                 midf = (t1 - collision_impactnudge.value) / (t1 - t2);
1406                 t->trace->fraction = bound(0, midf, 1);
1407
1408                 t->trace->hittexture = surface->texture->currentframe;
1409                 t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
1410                 t->trace->hitsupercontents = t->trace->hittexture->supercontents;
1411                 return surface->texture->currentframe;
1412         }
1413         return NULL;
1414 }
1415
1416 static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
1417 {
1418         const mplane_t *plane;
1419         double t1, t2;
1420         int side;
1421         double midf, mid[3];
1422         const mleaf_t *leaf;
1423
1424         while (node->plane)
1425         {
1426                 plane = node->plane;
1427                 if (plane->type < 3)
1428                 {
1429                         t1 = p1[plane->type] - plane->dist;
1430                         t2 = p2[plane->type] - plane->dist;
1431                 }
1432                 else
1433                 {
1434                         t1 = DotProduct (plane->normal, p1) - plane->dist;
1435                         t2 = DotProduct (plane->normal, p2) - plane->dist;
1436                 }
1437                 if (t1 < 0)
1438                 {
1439                         if (t2 < 0)
1440                         {
1441                                 node = node->children[1];
1442                                 continue;
1443                         }
1444                         side = 1;
1445                 }
1446                 else
1447                 {
1448                         if (t2 >= 0)
1449                         {
1450                                 node = node->children[0];
1451                                 continue;
1452                         }
1453                         side = 0;
1454                 }
1455
1456                 // the line intersects, find intersection point
1457                 // LadyHavoc: this uses the original trace for maximum accuracy
1458                 if (plane->type < 3)
1459                 {
1460                         t1 = t->start[plane->type] - plane->dist;
1461                         t2 = t->end[plane->type] - plane->dist;
1462                 }
1463                 else
1464                 {
1465                         t1 = DotProduct (plane->normal, t->start) - plane->dist;
1466                         t2 = DotProduct (plane->normal, t->end) - plane->dist;
1467                 }
1468
1469                 midf = t1 / (t1 - t2);
1470                 VectorMA(t->start, midf, t->dist, mid);
1471
1472                 // recurse both sides, front side first, return if we hit a surface
1473                 if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
1474                         return HULLCHECKSTATE_DONE;
1475
1476                 // test each surface on the node
1477                 Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
1478                 if (t->trace->hittexture)
1479                         return HULLCHECKSTATE_DONE;
1480
1481                 // recurse back side
1482                 return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
1483         }
1484         leaf = (const mleaf_t *)node;
1485         side = Mod_Q1BSP_SuperContentsFromNativeContents(leaf->contents);
1486         if (!t->trace->startfound)
1487         {
1488                 t->trace->startfound = true;
1489                 t->trace->startsupercontents |= side;
1490         }
1491         if (side & SUPERCONTENTS_LIQUIDSMASK)
1492                 t->trace->inwater = true;
1493         if (side == 0)
1494                 t->trace->inopen = true;
1495         if (side & t->trace->hitsupercontentsmask)
1496         {
1497                 // if the first leaf is solid, set startsolid
1498                 if (t->trace->allsolid)
1499                         t->trace->startsolid = true;
1500                 return HULLCHECKSTATE_SOLID;
1501         }
1502         else
1503         {
1504                 t->trace->allsolid = false;
1505                 return HULLCHECKSTATE_EMPTY;
1506         }
1507 }
1508
1509 static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
1510 {
1511         RecursiveHullCheckTraceInfo_t rhc;
1512
1513         memset(&rhc, 0, sizeof(rhc));
1514         memset(trace, 0, sizeof(trace_t));
1515         rhc.trace = trace;
1516         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1517         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1518         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1519         rhc.trace->fraction = 1;
1520         rhc.trace->allsolid = true;
1521         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
1522         VectorCopy(start, rhc.start);
1523         VectorCopy(end, rhc.end);
1524         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1525         Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
1526         VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1527 }
1528
1529 static void Mod_BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
1530 {
1531         int c;
1532         unsigned char *outstart = out;
1533         while (out < outend)
1534         {
1535                 if (in == inend)
1536                 {
1537                         Con_Printf("Mod_BSP_DecompressVis: input underrun on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1538                         return;
1539                 }
1540                 c = *in++;
1541                 if (c)
1542                         *out++ = c;
1543                 else
1544                 {
1545                         if (in == inend)
1546                         {
1547                                 Con_Printf("Mod_BSP_DecompressVis: input underrun (during zero-run) on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1548                                 return;
1549                         }
1550                         for (c = *in++;c > 0;c--)
1551                         {
1552                                 if (out == outend)
1553                                 {
1554                                         Con_Printf("Mod_BSP_DecompressVis: output overrun on model \"%s\" (decompressed %i of %i output bytes)\n", loadmodel->name, (int)(out - outstart), (int)(outend - outstart));
1555                                         return;
1556                                 }
1557                                 *out++ = 0;
1558                         }
1559                 }
1560         }
1561 }
1562
1563 /*
1564 =============
1565 Mod_Q1BSP_LoadSplitSky
1566
1567 A sky texture is 256*128, with the right side being a masked overlay
1568 ==============
1569 */
1570 static void Mod_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesperpixel)
1571 {
1572         int x, y;
1573         int w = width/2;
1574         int h = height;
1575         unsigned int *solidpixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1576         unsigned int *alphapixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1577
1578         // allocate a texture pool if we need it
1579         if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
1580                 loadmodel->texturepool = R_AllocTexturePool();
1581
1582         if (bytesperpixel == 4)
1583         {
1584                 for (y = 0;y < h;y++)
1585                 {
1586                         for (x = 0;x < w;x++)
1587                         {
1588                                 solidpixels[y*w+x] = ((unsigned *)src)[y*width+x+w];
1589                                 alphapixels[y*w+x] = ((unsigned *)src)[y*width+x];
1590                         }
1591                 }
1592         }
1593         else
1594         {
1595                 // make an average value for the back to avoid
1596                 // a fringe on the top level
1597                 int p, r, g, b;
1598                 union
1599                 {
1600                         unsigned int i;
1601                         unsigned char b[4];
1602                 }
1603                 bgra;
1604                 r = g = b = 0;
1605                 for (y = 0;y < h;y++)
1606                 {
1607                         for (x = 0;x < w;x++)
1608                         {
1609                                 p = src[x*width+y+w];
1610                                 r += palette_rgb[p][0];
1611                                 g += palette_rgb[p][1];
1612                                 b += palette_rgb[p][2];
1613                         }
1614                 }
1615                 bgra.b[2] = r/(w*h);
1616                 bgra.b[1] = g/(w*h);
1617                 bgra.b[0] = b/(w*h);
1618                 bgra.b[3] = 0;
1619                 for (y = 0;y < h;y++)
1620                 {
1621                         for (x = 0;x < w;x++)
1622                         {
1623                                 solidpixels[y*w+x] = palette_bgra_complete[src[y*width+x+w]];
1624                                 p = src[y*width+x];
1625                                 alphapixels[y*w+x] = p ? palette_bgra_complete[p] : bgra.i;
1626                         }
1627                 }
1628         }
1629
1630         // Load the solid and alpha parts of the sky texture as separate textures
1631         loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA(
1632                 "sky_solidtexture",
1633                 0,
1634                 (unsigned char *) solidpixels,
1635                 w, h, w, h,
1636                 CRC_Block((unsigned char *) solidpixels, w*h*4),
1637                 vid.sRGB3D);
1638         loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA(
1639                 "sky_alphatexture",
1640                 TEXF_ALPHA,
1641                 (unsigned char *) alphapixels,
1642                 w, h, w, h,
1643                 CRC_Block((unsigned char *) alphapixels, w*h*4),
1644                 vid.sRGB3D);
1645         Mem_Free(solidpixels);
1646         Mem_Free(alphapixels);
1647 }
1648
1649 static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
1650 {
1651         int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0, firstskynoshadowtexture = 0;
1652         skinframe_t *skinframemissing;
1653         texture_t *tx, *tx2, *anims[10], *altanims[10], *currentskynoshadowtexture;
1654         texture_t backuptex;
1655         unsigned char *data, *mtdata;
1656         const char *s;
1657         char mapname[MAX_QPATH], name[MAX_QPATH];
1658         unsigned char zeroopaque[4], zerotrans[4];
1659         sizebuf_t miptexsb;
1660         char vabuf[1024];
1661         Vector4Set(zeroopaque, 0, 0, 0, 255);
1662         Vector4Set(zerotrans, 0, 0, 0, 128);
1663
1664         loadmodel->data_textures = NULL;
1665
1666         // add two slots for notexture walls and notexture liquids, and duplicate
1667         // all sky textures; sky surfaces can be shadow-casting or not, the surface
1668         // loading will choose according to the contents behind the surface
1669         // (necessary to support e1m5 logo shadow which has a SKY contents brush,
1670         // while correctly treating sky textures as occluders in other situations).
1671         if (sb->cursize)
1672         {
1673                 int numsky = 0;
1674                 size_t watermark;
1675                 nummiptex = MSG_ReadLittleLong(sb);
1676                 loadmodel->num_textures = nummiptex + 2;
1677                 // save the position so we can go back to it
1678                 watermark = sb->readcount;
1679                 for (i = 0; i < nummiptex; i++)
1680                 {
1681                         doffset = MSG_ReadLittleLong(sb);
1682                         if (r_nosurftextures.integer)
1683                                 continue;
1684                         if (doffset == -1)
1685                         {
1686                                 Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
1687                                 continue;
1688                         }
1689
1690                         MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
1691
1692                         // copy name, but only up to 16 characters
1693                         // (the output buffer can hold more than this, but the input buffer is
1694                         //  only 16)
1695                         for (j = 0; j < 16; j++)
1696                                 name[j] = MSG_ReadByte(&miptexsb);
1697                         name[j] = 0;
1698                         // pretty up the buffer (replacing any trailing garbage with 0)
1699                         for (j = (int)strlen(name); j < 16; j++)
1700                                 name[j] = 0;
1701                         // bones_was_here: force all names to lowercase (matching code below) so we don't crash on e2m9
1702                         for (j = 0;name[j];j++)
1703                                 if (name[j] >= 'A' && name[j] <= 'Z')
1704                                         name[j] += 'a' - 'A';
1705
1706                         if (!strncmp(name, "sky", 3))
1707                                 numsky++;
1708                 }
1709
1710                 // bump it back to where we started parsing
1711                 sb->readcount = (int)watermark;
1712
1713                 firstskynoshadowtexture = loadmodel->num_textures;
1714                 loadmodel->num_textures += numsky;
1715         }
1716         else
1717         {
1718                 loadmodel->num_textures = 2;
1719                 firstskynoshadowtexture = loadmodel->num_textures;
1720         }
1721         loadmodel->num_texturesperskin = loadmodel->num_textures;
1722
1723         loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
1724
1725         // we'll be writing to these in parallel for sky textures
1726         currentskynoshadowtexture = loadmodel->data_textures + firstskynoshadowtexture;
1727
1728         // fill out all slots with notexture
1729         skinframemissing = R_SkinFrame_LoadMissing();
1730         for (i = 0, tx = loadmodel->data_textures;i < loadmodel->num_textures;i++, tx++)
1731         {
1732                 dp_strlcpy(tx->name, "NO TEXTURE FOUND", sizeof(tx->name));
1733                 tx->width = 16;
1734                 tx->height = 16;
1735                 tx->basealpha = 1.0f;
1736                 tx->materialshaderpass = tx->shaderpasses[0] = Mod_CreateShaderPass(loadmodel->mempool, skinframemissing);
1737                 tx->materialshaderpass->skinframes[0] = skinframemissing;
1738                 tx->currentskinframe = skinframemissing;
1739                 tx->basematerialflags = MATERIALFLAG_WALL;
1740                 if (i == loadmodel->num_textures - 1)
1741                 {
1742                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1743                         tx->supercontents = mod_q1bsp_texture_water.supercontents;
1744                         tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1745                 }
1746                 else
1747                 {
1748                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1749                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1750                 }
1751                 tx->currentframe = tx;
1752
1753                 // clear water settings
1754                 tx->reflectmin = 0;
1755                 tx->reflectmax = 1;
1756                 tx->refractive_index = mod_q3shader_default_refractive_index.value;
1757                 tx->refractfactor = 1;
1758                 Vector4Set(tx->refractcolor4f, 1, 1, 1, 1);
1759                 tx->reflectfactor = 1;
1760                 Vector4Set(tx->reflectcolor4f, 1, 1, 1, 1);
1761                 tx->r_water_wateralpha = 1;
1762                 tx->offsetmapping = OFFSETMAPPING_DEFAULT;
1763                 tx->offsetscale = 1;
1764                 tx->offsetbias = 0;
1765                 tx->specularscalemod = 1;
1766                 tx->specularpowermod = 1;
1767                 tx->transparentsort = TRANSPARENTSORT_DISTANCE;
1768                 // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
1769                 // JUST GREP FOR "specularscalemod = 1".
1770         }
1771
1772         if (!sb->cursize)
1773         {
1774                 Con_Printf("%s: no miptex lump to load textures from\n", loadmodel->name);
1775                 return;
1776         }
1777
1778         s = loadmodel->name;
1779         if (!strncasecmp(s, "maps/", 5))
1780                 s += 5;
1781         FS_StripExtension(s, mapname, sizeof(mapname));
1782
1783         // LadyHavoc: mostly rewritten map texture loader
1784         for (i = 0;i < nummiptex;i++)
1785         {
1786                 doffset = MSG_ReadLittleLong(sb);
1787                 if (r_nosurftextures.integer)
1788                         continue;
1789                 if (doffset == -1)
1790                 {
1791                         Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
1792                         continue;
1793                 }
1794
1795                 MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
1796
1797                 // copy name, but only up to 16 characters
1798                 // (the output buffer can hold more than this, but the input buffer is
1799                 //  only 16)
1800                 for (j = 0;j < 16;j++)
1801                         name[j] = MSG_ReadByte(&miptexsb);
1802                 name[j] = 0;
1803                 // pretty up the buffer (replacing any trailing garbage with 0)
1804                 for (j = (int)strlen(name);j < 16;j++)
1805                         name[j] = 0;
1806
1807                 if (!name[0])
1808                 {
1809                         dpsnprintf(name, sizeof(name), "unnamed%i", i);
1810                         Con_DPrintf("%s: warning: renaming unnamed texture to %s\n", loadmodel->name, name);
1811                 }
1812
1813                 mtwidth = MSG_ReadLittleLong(&miptexsb);
1814                 mtheight = MSG_ReadLittleLong(&miptexsb);
1815                 mtdata = NULL;
1816                 j = MSG_ReadLittleLong(&miptexsb);
1817                 if (j)
1818                 {
1819                         // texture included
1820                         if (j < 40 || j + mtwidth * mtheight > miptexsb.cursize)
1821                         {
1822                                 Con_Printf("%s: Texture \"%s\" is corrupt or incomplete\n", loadmodel->name, name);
1823                                 continue;
1824                         }
1825                         mtdata = miptexsb.data + j;
1826                 }
1827
1828                 if ((mtwidth & 15) || (mtheight & 15))
1829                         Con_DPrintf("%s: warning: texture \"%s\" is not 16 aligned\n", loadmodel->name, name);
1830
1831                 // LadyHavoc: force all names to lowercase
1832                 for (j = 0;name[j];j++)
1833                         if (name[j] >= 'A' && name[j] <= 'Z')
1834                                 name[j] += 'a' - 'A';
1835
1836                 tx = loadmodel->data_textures + i;
1837                 // try to load shader or external textures, but first we have to backup the texture_t because shader loading overwrites it even if it fails
1838                 backuptex = loadmodel->data_textures[i];
1839                 if (name[0] && /* HACK */ strncmp(name, "sky", 3) /* END HACK */ && (Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, loadmodel->data_textures + i, va(vabuf, sizeof(vabuf), "%s/%s", mapname, name), false, false, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL) ||
1840                                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, loadmodel->data_textures + i, va(vabuf, sizeof(vabuf), "%s"   , name), false, false, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL)))
1841                 {
1842                         // set the width/height fields which are used for parsing texcoords in this bsp format
1843                         tx->width = mtwidth;
1844                         tx->height = mtheight;
1845                         continue;
1846                 }
1847                 // no luck with loading shaders or external textures - restore the in-progress texture loading
1848                 loadmodel->data_textures[i] = backuptex;
1849
1850                 dp_strlcpy(tx->name, name, sizeof(tx->name));
1851                 tx->width = mtwidth;
1852                 tx->height = mtheight;
1853                 tx->basealpha = 1.0f;
1854
1855                 // start out with no animation
1856                 tx->currentframe = tx;
1857                 tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
1858
1859                 if (tx->name[0] == '*')
1860                 {
1861                         if (!strncmp(tx->name, "*lava", 5))
1862                         {
1863                                 tx->supercontents = mod_q1bsp_texture_lava.supercontents;
1864                                 tx->surfaceflags = mod_q1bsp_texture_lava.surfaceflags;
1865                         }
1866                         else if (!strncmp(tx->name, "*slime", 6))
1867                         {
1868                                 tx->supercontents = mod_q1bsp_texture_slime.supercontents;
1869                                 tx->surfaceflags = mod_q1bsp_texture_slime.surfaceflags;
1870                         }
1871                         else
1872                         {
1873                                 tx->supercontents = mod_q1bsp_texture_water.supercontents;
1874                                 tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1875                         }
1876                 }
1877                 else if (!strncmp(tx->name, "sky", 3))
1878                 {
1879                         tx->supercontents = mod_q1bsp_texture_sky.supercontents;
1880                         tx->surfaceflags = mod_q1bsp_texture_sky.surfaceflags;
1881                         // for the surface traceline we need to hit this surface as a solid...
1882                         tx->supercontents |= SUPERCONTENTS_SOLID;
1883                 }
1884                 else
1885                 {
1886                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1887                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1888                 }
1889
1890                 if (cls.state != ca_dedicated)
1891                 {
1892                         skinframe_t *skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false, false);
1893                         if ((!skinframe &&
1894                             !(skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false, false)))
1895                                 // HACK: It loads custom skybox textures as a wall if loaded as a skinframe.
1896                                 || !strncmp(tx->name, "sky", 3))
1897                         {
1898                                 // did not find external texture via shader loading, load it from the bsp or wad3
1899                                 if (loadmodel->brush.ishlbsp)
1900                                 {
1901                                         // internal texture overrides wad
1902                                         unsigned char* pixels, * freepixels;
1903                                         pixels = freepixels = NULL;
1904                                         if (mtdata)
1905                                                 pixels = W_ConvertWAD3TextureBGRA(&miptexsb);
1906                                         if (pixels == NULL)
1907                                                 pixels = freepixels = W_GetTextureBGRA(tx->name);
1908                                         if (pixels != NULL)
1909                                         {
1910                                                 tx->width = image_width;
1911                                                 tx->height = image_height;
1912                                                 tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, pixels, image_width, image_height, image_width, image_height, CRC_Block(pixels, image_width * image_height * 4), true);
1913                                         }
1914                                         if (freepixels)
1915                                                 Mem_Free(freepixels);
1916                                 }
1917                                 else if (!strncmp(tx->name, "sky", 3) && mtwidth == mtheight * 2)
1918                                 {
1919                                         data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), false, false, false, NULL);
1920                                         if (!data)
1921                                                 data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), false, false, false, NULL);
1922                                         if (data && image_width == image_height * 2)
1923                                         {
1924                                                 Mod_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
1925                                                 Mem_Free(data);
1926                                         }
1927                                         else if (mtdata != NULL)
1928                                                 Mod_Q1BSP_LoadSplitSky(mtdata, mtwidth, mtheight, 1);
1929                                 }
1930                                 else if (mtdata) // texture included
1931                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, false, r_fullbrights.integer, mtdata, tx->width, tx->height);
1932                                 // if mtdata is NULL, the "missing" texture has already been assigned to this
1933                                 // LadyHavoc: some Tenebrae textures get replaced by black
1934                                 if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1935                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, 0, 0, 0, false);
1936                                 else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1937                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, 0, 0, 0, false);
1938                         }
1939                         else
1940                                 tx->materialshaderpass->skinframes[0] = skinframe;
1941                         tx->currentskinframe = tx->materialshaderpass->skinframes[0];
1942                 }
1943
1944                 tx->basematerialflags = MATERIALFLAG_WALL;
1945                 if (tx->name[0] == '*')
1946                 {
1947                         // LadyHavoc: some turbulent textures should not be affected by wateralpha
1948                         if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1949                                 tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
1950                         else if (!strncmp(tx->name,"*lava",5)
1951                          || !strncmp(tx->name,"*teleport",9)
1952                          || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
1953                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1954                         else
1955                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
1956                         if (tx->currentskinframe != NULL && tx->currentskinframe->hasalpha)
1957                                 tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1958                 }
1959                 else if (tx->name[0] == '{') // fence textures
1960                 {
1961                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
1962                 }
1963                 else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1964                 {
1965                         // replace the texture with black
1966                         tx->basematerialflags |= MATERIALFLAG_REFLECTION;
1967                 }
1968                 else if (!strncmp(tx->name, "sky", 3))
1969                         tx->basematerialflags = MATERIALFLAG_SKY;
1970                 else if (!strcmp(tx->name, "caulk"))
1971                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
1972                 else if (tx->currentskinframe != NULL && tx->currentskinframe->hasalpha)
1973                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1974                 tx->currentmaterialflags = tx->basematerialflags;
1975
1976                 // duplicate of sky with NOSHADOW
1977                 if (tx->basematerialflags & MATERIALFLAG_SKY)
1978                 {
1979                         *currentskynoshadowtexture = *tx;
1980                         currentskynoshadowtexture->basematerialflags |= MATERIALFLAG_NOSHADOW;
1981                         tx->skynoshadowtexture = currentskynoshadowtexture;
1982                         currentskynoshadowtexture++;
1983                 }
1984         }
1985
1986         // sequence the animations
1987         for (i = 0;i < nummiptex;i++)
1988         {
1989                 tx = loadmodel->data_textures + i;
1990                 if (!tx || tx->name[0] != '+' || tx->name[1] == 0 || tx->name[2] == 0)
1991                         continue;
1992                 num = tx->name[1];
1993                 if ((num < '0' || num > '9') && (num < 'a' || num > 'j'))
1994                 {
1995                         Con_Printf("Bad animating texture %s\n", tx->name);
1996                         continue;
1997                 }
1998                 if (tx->anim_total[0] || tx->anim_total[1])
1999                         continue;       // already sequenced
2000
2001                 // find the number of frames in the animation
2002                 memset(anims, 0, sizeof(anims));
2003                 memset(altanims, 0, sizeof(altanims));
2004
2005                 for (j = i;j < nummiptex;j++)
2006                 {
2007                         tx2 = loadmodel->data_textures + j;
2008                         if (!tx2 || tx2->name[0] != '+' || strcmp(tx2->name+2, tx->name+2))
2009                                 continue;
2010
2011                         num = tx2->name[1];
2012                         if (num >= '0' && num <= '9')
2013                                 anims[num - '0'] = tx2;
2014                         else if (num >= 'a' && num <= 'j')
2015                                 altanims[num - 'a'] = tx2;
2016                         // No need to warn otherwise - we already did above.
2017                 }
2018
2019                 max = altmax = 0;
2020                 for (j = 0;j < 10;j++)
2021                 {
2022                         if (anims[j])
2023                                 max = j + 1;
2024                         if (altanims[j])
2025                                 altmax = j + 1;
2026                 }
2027                 //Con_Printf("linking animation %s (%i:%i frames)\n\n", tx->name, max, altmax);
2028
2029                 incomplete = false;
2030                 for (j = 0;j < max;j++)
2031                 {
2032                         if (!anims[j])
2033                         {
2034                                 Con_Printf("Missing frame %i of %s\n", j, tx->name);
2035                                 incomplete = true;
2036                         }
2037                 }
2038                 for (j = 0;j < altmax;j++)
2039                 {
2040                         if (!altanims[j])
2041                         {
2042                                 Con_Printf("Missing altframe %i of %s\n", j, tx->name);
2043                                 incomplete = true;
2044                         }
2045                 }
2046                 if (incomplete)
2047                         continue;
2048
2049                 // If we have exactly one frame, something's wrong.
2050                 if (max + altmax <= 1)
2051                 {
2052                         Con_Printf("Texture %s is animated (leading +) but has only one frame\n", tx->name);
2053                 }
2054
2055                 if (altmax < 1)
2056                 {
2057                         // if there is no alternate animation, duplicate the primary
2058                         // animation into the alternate
2059                         altmax = max;
2060                         for (k = 0;k < 10;k++)
2061                                 altanims[k] = anims[k];
2062                 }
2063
2064                 if (max < 1)
2065                 {
2066                         // Warn.
2067                         Con_Printf("Missing frame 0 of %s\n", tx->name);
2068
2069                         // however, we can handle this by duplicating the alternate animation into the primary
2070                         max = altmax;
2071                         for (k = 0;k < 10;k++)
2072                                 anims[k] = altanims[k];
2073                 }
2074
2075
2076                 // link together the primary animation
2077                 for (j = 0;j < max;j++)
2078                 {
2079                         tx2 = anims[j];
2080                         tx2->animated = 1; // q1bsp
2081                         tx2->anim_total[0] = max;
2082                         tx2->anim_total[1] = altmax;
2083                         for (k = 0;k < 10;k++)
2084                         {
2085                                 tx2->anim_frames[0][k] = anims[k];
2086                                 tx2->anim_frames[1][k] = altanims[k];
2087                         }
2088                 }
2089
2090                 // if there really is an alternate anim...
2091                 if (anims[0] != altanims[0])
2092                 {
2093                         // link together the alternate animation
2094                         for (j = 0;j < altmax;j++)
2095                         {
2096                                 tx2 = altanims[j];
2097                                 tx2->animated = 1; // q1bsp
2098                                 // the primary/alternate are reversed here
2099                                 tx2->anim_total[0] = altmax;
2100                                 tx2->anim_total[1] = max;
2101                                 for (k = 0;k < 10;k++)
2102                                 {
2103                                         tx2->anim_frames[0][k] = altanims[k];
2104                                         tx2->anim_frames[1][k] = anims[k];
2105                                 }
2106                         }
2107                 }
2108         }
2109 }
2110
2111 static void Mod_Q1BSP_LoadLighting(sizebuf_t *sb)
2112 {
2113         int i;
2114         unsigned char *in, *out, *data, d;
2115         char litfilename[MAX_QPATH];
2116         char dlitfilename[MAX_QPATH];
2117         fs_offset_t filesize;
2118         if (loadmodel->brush.ishlbsp) // LadyHavoc: load the colored lighting data straight
2119         {
2120                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2121                 for (i = 0;i < sb->cursize;i++)
2122                         loadmodel->brushq1.lightdata[i] = sb->data[i] >>= 1;
2123         }
2124         else // LadyHavoc: bsp version 29 (normal white lighting)
2125         {
2126                 // LadyHavoc: hope is not lost yet, check for a .lit file to load
2127                 dp_strlcpy (litfilename, loadmodel->name, sizeof (litfilename));
2128                 FS_StripExtension (litfilename, litfilename, sizeof (litfilename));
2129                 dp_strlcpy (dlitfilename, litfilename, sizeof (dlitfilename));
2130                 dp_strlcat (litfilename, ".lit", sizeof (litfilename));
2131                 dp_strlcat (dlitfilename, ".dlit", sizeof (dlitfilename));
2132                 data = (unsigned char*) FS_LoadFile(litfilename, tempmempool, false, &filesize);
2133                 if (data)
2134                 {
2135                         if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2136                         {
2137                                 i = LittleLong(((int *)data)[1]);
2138                                 if (i == 1)
2139                                 {
2140                                         if (developer_loading.integer)
2141                                                 Con_Printf("loaded %s\n", litfilename);
2142                                         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2143                                         memcpy(loadmodel->brushq1.lightdata, data + 8, filesize - 8);
2144                                         Mem_Free(data);
2145                                         data = (unsigned char*) FS_LoadFile(dlitfilename, tempmempool, false, &filesize);
2146                                         if (data)
2147                                         {
2148                                                 if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2149                                                 {
2150                                                         i = LittleLong(((int *)data)[1]);
2151                                                         if (i == 1)
2152                                                         {
2153                                                                 if (developer_loading.integer)
2154                                                                         Con_Printf("loaded %s\n", dlitfilename);
2155                                                                 loadmodel->brushq1.nmaplightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2156                                                                 memcpy(loadmodel->brushq1.nmaplightdata, data + 8, filesize - 8);
2157                                                                 loadmodel->brushq3.deluxemapping_modelspace = false;
2158                                                                 loadmodel->brushq3.deluxemapping = true;
2159                                                         }
2160                                                 }
2161                                                 Mem_Free(data);
2162                                                 data = NULL;
2163                                         }
2164                                         return;
2165                                 }
2166                                 else
2167                                         Con_Printf("Unknown .lit file version (%d)\n", i);
2168                         }
2169                         else if (filesize == 8)
2170                                 Con_Print("Empty .lit file, ignoring\n");
2171                         else
2172                                 Con_Printf("Corrupt .lit file (file size %i bytes, should be %i bytes), ignoring\n", (int) filesize, (int) (8 + sb->cursize * 3));
2173                         if (data)
2174                         {
2175                                 Mem_Free(data);
2176                                 data = NULL;
2177                         }
2178                 }
2179                 // LadyHavoc: oh well, expand the white lighting data
2180                 if (!sb->cursize)
2181                         return;
2182                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize*3);
2183                 in = sb->data;
2184                 out = loadmodel->brushq1.lightdata;
2185                 for (i = 0;i < sb->cursize;i++)
2186                 {
2187                         d = *in++;
2188                         *out++ = d;
2189                         *out++ = d;
2190                         *out++ = d;
2191                 }
2192         }
2193 }
2194
2195 static void Mod_Q1BSP_LoadVisibility(sizebuf_t *sb)
2196 {
2197         loadmodel->brushq1.num_compressedpvs = 0;
2198         loadmodel->brushq1.data_compressedpvs = NULL;
2199         if (!sb->cursize)
2200                 return;
2201         loadmodel->brushq1.num_compressedpvs = sb->cursize;
2202         loadmodel->brushq1.data_compressedpvs = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2203         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.data_compressedpvs);
2204 }
2205
2206 // used only for HalfLife maps
2207 static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
2208 {
2209         char key[128], value[4096];
2210         int i, j, k;
2211         if (!data)
2212                 return;
2213         if (!COM_ParseToken_Simple(&data, false, false, true))
2214                 return; // error
2215         if (com_token[0] != '{')
2216                 return; // error
2217         while (1)
2218         {
2219                 if (!COM_ParseToken_Simple(&data, false, false, true))
2220                         return; // error
2221                 if (com_token[0] == '}')
2222                         break; // end of worldspawn
2223                 if (com_token[0] == '_')
2224                         dp_strlcpy(key, com_token + 1, sizeof(key));
2225                 else
2226                         dp_strlcpy(key, com_token, sizeof(key));
2227                 while (key[strlen(key)-1] == ' ') // remove trailing spaces
2228                         key[strlen(key)-1] = 0;
2229                 if (!COM_ParseToken_Simple(&data, false, false, true))
2230                         return; // error
2231                 dpsnprintf(value, sizeof(value), "%s", com_token);
2232                 if (!strcmp("wad", key)) // for HalfLife maps
2233                 {
2234                         if (loadmodel->brush.ishlbsp)
2235                         {
2236                                 j = 0;
2237                                 for (i = 0;i < (int)sizeof(value);i++)
2238                                         if (value[i] != ';' && value[i] != '\\' && value[i] != '/' && value[i] != ':')
2239                                                 break;
2240                                 if (i < (int)sizeof(value) && value[i])
2241                                 {
2242                                         for (;i < (int)sizeof(value);i++)
2243                                         {
2244                                                 // ignore path - the \\ check is for HalfLife... stupid windoze 'programmers'...
2245                                                 if (value[i] == '\\' || value[i] == '/' || value[i] == ':')
2246                                                         j = i+1;
2247                                                 else if (value[i] == ';' || value[i] == 0)
2248                                                 {
2249                                                         k = value[i];
2250                                                         value[i] = 0;
2251                                                         W_LoadTextureWadFile(&value[j], false);
2252                                                         j = i+1;
2253                                                         if (!k)
2254                                                                 break;
2255                                                 }
2256                                         }
2257                                 }
2258                         }
2259                 }
2260         }
2261 }
2262
2263 static void Mod_Q1BSP_LoadEntities(sizebuf_t *sb)
2264 {
2265         loadmodel->brush.entities = NULL;
2266         if (!sb->cursize)
2267                 return;
2268         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
2269         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
2270         loadmodel->brush.entities[sb->cursize] = 0;
2271         if (loadmodel->brush.ishlbsp)
2272                 Mod_Q1BSP_ParseWadsFromEntityLump(loadmodel->brush.entities);
2273 }
2274
2275
2276 static void Mod_Q1BSP_LoadVertexes(sizebuf_t *sb)
2277 {
2278         mvertex_t       *out;
2279         int                     i, count;
2280         int                     structsize = 12;
2281
2282         if (sb->cursize % structsize)
2283                 Host_Error("Mod_Q1BSP_LoadVertexes: funny lump size in %s",loadmodel->name);
2284         count = sb->cursize / structsize;
2285         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2286
2287         loadmodel->brushq1.vertexes = out;
2288         loadmodel->brushq1.numvertexes = count;
2289
2290         for ( i=0 ; i<count ; i++, out++)
2291         {
2292                 out->position[0] = MSG_ReadLittleFloat(sb);
2293                 out->position[1] = MSG_ReadLittleFloat(sb);
2294                 out->position[2] = MSG_ReadLittleFloat(sb);
2295         }
2296 }
2297
2298 static void Mod_BSP_LoadSubmodels(sizebuf_t *sb, hullinfo_t *hullinfo)
2299 {
2300         mmodel_t        *out;
2301         int                     i, j, count;
2302         int                     structsize = hullinfo ? (48+4*hullinfo->filehulls) : 48;
2303
2304         if (sb->cursize % structsize)
2305                 Host_Error ("Mod_BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
2306
2307         count = sb->cursize / structsize;
2308         out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
2309
2310         loadmodel->brushq1.submodels = out;
2311         loadmodel->brush.numsubmodels = count;
2312
2313         for (i = 0; i < count; i++, out++)
2314         {
2315         // spread out the mins / maxs by a pixel
2316                 out->mins[0] = MSG_ReadLittleFloat(sb) - 1;
2317                 out->mins[1] = MSG_ReadLittleFloat(sb) - 1;
2318                 out->mins[2] = MSG_ReadLittleFloat(sb) - 1;
2319                 out->maxs[0] = MSG_ReadLittleFloat(sb) + 1;
2320                 out->maxs[1] = MSG_ReadLittleFloat(sb) + 1;
2321                 out->maxs[2] = MSG_ReadLittleFloat(sb) + 1;
2322                 out->origin[0] = MSG_ReadLittleFloat(sb);
2323                 out->origin[1] = MSG_ReadLittleFloat(sb);
2324                 out->origin[2] = MSG_ReadLittleFloat(sb);
2325                 if(hullinfo)
2326                 {
2327                         for (j = 0; j < hullinfo->filehulls; j++)
2328                                 out->headnode[j] = MSG_ReadLittleLong(sb);
2329                         out->visleafs  = MSG_ReadLittleLong(sb);
2330                 }
2331                 else // Quake 2 has only one hull
2332                         out->headnode[0] = MSG_ReadLittleLong(sb);
2333
2334                 out->firstface = MSG_ReadLittleLong(sb);
2335                 out->numfaces  = MSG_ReadLittleLong(sb);
2336         }
2337 }
2338
2339 static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
2340 {
2341         medge_t *out;
2342         int     i, count;
2343         int             structsize = loadmodel->brush.isbsp2 ? 8 : 4;
2344
2345         if (sb->cursize % structsize)
2346                 Host_Error("Mod_Q1BSP_LoadEdges: funny lump size in %s",loadmodel->name);
2347         count = sb->cursize / structsize;
2348         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2349
2350         loadmodel->brushq1.edges = out;
2351         loadmodel->brushq1.numedges = count;
2352
2353         for ( i=0 ; i<count ; i++, out++)
2354         {
2355                 if (loadmodel->brush.isbsp2)
2356                 {
2357                         out->v[0] = (unsigned int)MSG_ReadLittleLong(sb);
2358                         out->v[1] = (unsigned int)MSG_ReadLittleLong(sb);
2359                 }
2360                 else
2361                 {
2362                         out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
2363                         out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
2364                 }
2365                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
2366                 {
2367                         Con_Printf("Mod_Q1BSP_LoadEdges: %s has invalid vertex indices in edge %i (vertices %i %i >= numvertices %i)\n", loadmodel->name, i, out->v[0], out->v[1], loadmodel->brushq1.numvertexes);
2368                         if(!loadmodel->brushq1.numvertexes)
2369                                 Host_Error("Mod_Q1BSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
2370
2371                         out->v[0] = 0;
2372                         out->v[1] = 0;
2373                 }
2374         }
2375 }
2376
2377 static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
2378 {
2379         mtexinfo_t *out;
2380         int i, j, k, count, miptex;
2381         int structsize = 40;
2382
2383         if (sb->cursize % structsize)
2384                 Host_Error("Mod_Q1BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
2385         count = sb->cursize / structsize;
2386         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2387
2388         loadmodel->brushq1.texinfo = out;
2389         loadmodel->brushq1.numtexinfo = count;
2390
2391         for (i = 0;i < count;i++, out++)
2392         {
2393                 for (k = 0;k < 2;k++)
2394                         for (j = 0;j < 4;j++)
2395                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
2396
2397                 miptex = MSG_ReadLittleLong(sb);
2398                 out->q1flags = MSG_ReadLittleLong(sb);
2399
2400                 if (out->q1flags & TEX_SPECIAL)
2401                 {
2402                         // if texture chosen is NULL or the shader needs a lightmap,
2403                         // force to notexture water shader
2404                         out->textureindex = loadmodel->num_textures - 1;
2405                 }
2406                 else
2407                 {
2408                         // if texture chosen is NULL, force to notexture
2409                         out->textureindex = loadmodel->num_textures - 2;
2410                 }
2411                 // see if the specified miptex is valid and try to use it instead
2412                 if (loadmodel->data_textures)
2413                 {
2414                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
2415                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
2416                         else
2417                                 out->textureindex = miptex;
2418                 }
2419         }
2420 }
2421
2422 #if 0
2423 void BoundPoly(int numverts, float *verts, vec3_t mins, vec3_t maxs)
2424 {
2425         int             i, j;
2426         float   *v;
2427
2428         mins[0] = mins[1] = mins[2] = 9999;
2429         maxs[0] = maxs[1] = maxs[2] = -9999;
2430         v = verts;
2431         for (i = 0;i < numverts;i++)
2432         {
2433                 for (j = 0;j < 3;j++, v++)
2434                 {
2435                         if (*v < mins[j])
2436                                 mins[j] = *v;
2437                         if (*v > maxs[j])
2438                                 maxs[j] = *v;
2439                 }
2440         }
2441 }
2442
2443 #define MAX_SUBDIVPOLYTRIANGLES 4096
2444 #define MAX_SUBDIVPOLYVERTS(MAX_SUBDIVPOLYTRIANGLES * 3)
2445
2446 static int subdivpolyverts, subdivpolytriangles;
2447 static int subdivpolyindex[MAX_SUBDIVPOLYTRIANGLES][3];
2448 static float subdivpolyvert[MAX_SUBDIVPOLYVERTS][3];
2449
2450 static int subdivpolylookupvert(vec3_t v)
2451 {
2452         int i;
2453         for (i = 0;i < subdivpolyverts;i++)
2454                 if (subdivpolyvert[i][0] == v[0]
2455                  && subdivpolyvert[i][1] == v[1]
2456                  && subdivpolyvert[i][2] == v[2])
2457                         return i;
2458         if (subdivpolyverts >= MAX_SUBDIVPOLYVERTS)
2459                 Host_Error("SubDividePolygon: ran out of vertices in buffer, please increase your r_subdivide_size");
2460         VectorCopy(v, subdivpolyvert[subdivpolyverts]);
2461         return subdivpolyverts++;
2462 }
2463
2464 static void SubdividePolygon(int numverts, float *verts)
2465 {
2466         int             i, i1, i2, i3, f, b, c, p;
2467         vec3_t  mins, maxs, front[256], back[256];
2468         float   m, *pv, *cv, dist[256], frac;
2469
2470         if (numverts > 250)
2471                 Host_Error("SubdividePolygon: ran out of verts in buffer");
2472
2473         BoundPoly(numverts, verts, mins, maxs);
2474
2475         for (i = 0;i < 3;i++)
2476         {
2477                 m = (mins[i] + maxs[i]) * 0.5;
2478                 m = r_subdivide_size.value * floor(m/r_subdivide_size.value + 0.5);
2479                 if (maxs[i] - m < 8)
2480                         continue;
2481                 if (m - mins[i] < 8)
2482                         continue;
2483
2484                 // cut it
2485                 for (cv = verts, c = 0;c < numverts;c++, cv += 3)
2486                         dist[c] = cv[i] - m;
2487
2488                 f = b = 0;
2489                 for (p = numverts - 1, c = 0, pv = verts + p * 3, cv = verts;c < numverts;p = c, c++, pv = cv, cv += 3)
2490                 {
2491                         if (dist[p] >= 0)
2492                         {
2493                                 VectorCopy(pv, front[f]);
2494                                 f++;
2495                         }
2496                         if (dist[p] <= 0)
2497                         {
2498                                 VectorCopy(pv, back[b]);
2499                                 b++;
2500                         }
2501                         if (dist[p] == 0 || dist[c] == 0)
2502                                 continue;
2503                         if ((dist[p] > 0) != (dist[c] > 0) )
2504                         {
2505                                 // clip point
2506                                 frac = dist[p] / (dist[p] - dist[c]);
2507                                 front[f][0] = back[b][0] = pv[0] + frac * (cv[0] - pv[0]);
2508                                 front[f][1] = back[b][1] = pv[1] + frac * (cv[1] - pv[1]);
2509                                 front[f][2] = back[b][2] = pv[2] + frac * (cv[2] - pv[2]);
2510                                 f++;
2511                                 b++;
2512                         }
2513                 }
2514
2515                 SubdividePolygon(f, front[0]);
2516                 SubdividePolygon(b, back[0]);
2517                 return;
2518         }
2519
2520         i1 = subdivpolylookupvert(verts);
2521         i2 = subdivpolylookupvert(verts + 3);
2522         for (i = 2;i < numverts;i++)
2523         {
2524                 if (subdivpolytriangles >= MAX_SUBDIVPOLYTRIANGLES)
2525                 {
2526                         Con_Print("SubdividePolygon: ran out of triangles in buffer, please increase your r_subdivide_size\n");
2527                         return;
2528                 }
2529
2530                 i3 = subdivpolylookupvert(verts + i * 3);
2531                 subdivpolyindex[subdivpolytriangles][0] = i1;
2532                 subdivpolyindex[subdivpolytriangles][1] = i2;
2533                 subdivpolyindex[subdivpolytriangles][2] = i3;
2534                 i2 = i3;
2535                 subdivpolytriangles++;
2536         }
2537 }
2538
2539 //Breaks a polygon up along axial 64 unit
2540 //boundaries so that turbulent and sky warps
2541 //can be done reasonably.
2542 static void Mod_Q1BSP_GenerateWarpMesh(msurface_t *surface)
2543 {
2544         int i, j;
2545         surfvertex_t *v;
2546         surfmesh_t *mesh;
2547
2548         subdivpolytriangles = 0;
2549         subdivpolyverts = 0;
2550         SubdividePolygon(surface->num_vertices, (surface->mesh->data_vertex3f + 3 * surface->num_firstvertex));
2551         if (subdivpolytriangles < 1)
2552                 Host_Error("Mod_Q1BSP_GenerateWarpMesh: no triangles?");
2553
2554         surface->mesh = mesh = Mem_Alloc(loadmodel->mempool, sizeof(surfmesh_t) + subdivpolytriangles * sizeof(int[3]) + subdivpolyverts * sizeof(surfvertex_t));
2555         mesh->num_vertices = subdivpolyverts;
2556         mesh->num_triangles = subdivpolytriangles;
2557         mesh->vertex = (surfvertex_t *)(mesh + 1);
2558         mesh->index = (int *)(mesh->vertex + mesh->num_vertices);
2559         memset(mesh->vertex, 0, mesh->num_vertices * sizeof(surfvertex_t));
2560
2561         for (i = 0;i < mesh->num_triangles;i++)
2562                 for (j = 0;j < 3;j++)
2563                         mesh->index[i*3+j] = subdivpolyindex[i][j];
2564
2565         for (i = 0, v = mesh->vertex;i < subdivpolyverts;i++, v++)
2566         {
2567                 VectorCopy(subdivpolyvert[i], v->v);
2568                 v->st[0] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[0]);
2569                 v->st[1] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[1]);
2570         }
2571 }
2572 #endif
2573
2574 extern cvar_t gl_max_lightmapsize;
2575 static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
2576 {
2577         msurface_t *surface;
2578         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
2579         float texmins[2], texmaxs[2], val;
2580         rtexture_t *lightmaptexture, *deluxemaptexture;
2581         char vabuf[1024];
2582         int structsize = loadmodel->brush.isbsp2 ? 28 : 20;
2583
2584         if (sb->cursize % structsize)
2585                 Host_Error("Mod_Q1BSP_LoadFaces: funny lump size in %s",loadmodel->name);
2586         count = sb->cursize / structsize;
2587         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
2588         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
2589
2590         loadmodel->num_surfaces = count;
2591
2592         loadmodel->brushq1.firstrender = true;
2593         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
2594
2595         totalverts = 0;
2596         totaltris = 0;
2597         for (surfacenum = 0;surfacenum < count;surfacenum++)
2598         {
2599                 if (loadmodel->brush.isbsp2)
2600                         numedges = BuffLittleLong(sb->data + structsize * surfacenum + 12);
2601                 else
2602                         numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
2603                 totalverts += numedges;
2604                 totaltris += numedges - 2;
2605         }
2606
2607         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false);
2608
2609         lightmaptexture = NULL;
2610         deluxemaptexture = r_texture_blanknormalmap;
2611         lightmapnumber = 0;
2612         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
2613         totallightmapsamples = 0;
2614
2615         totalverts = 0;
2616         totaltris = 0;
2617         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2618         {
2619                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
2620                 // the struct on disk is the same in BSP29 (Q1), BSP30 (HL1), and IBSP38 (Q2)
2621                 planenum = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2622                 /*side = */loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2623                 firstedge = MSG_ReadLittleLong(sb);
2624                 numedges = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2625                 texinfoindex = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2626                 for (i = 0;i < MAXLIGHTMAPS;i++)
2627                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
2628                 lightmapoffset = MSG_ReadLittleLong(sb);
2629
2630                 // FIXME: validate edges, texinfo, etc?
2631                 if ((unsigned int) firstedge > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) firstedge + (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges)
2632                         Host_Error("Mod_Q1BSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
2633                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
2634                         Host_Error("Mod_Q1BSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
2635                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
2636                         Host_Error("Mod_Q1BSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
2637
2638                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
2639                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
2640
2641                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
2642                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
2643                         lightmapoffset = -1;
2644
2645                 //surface->flags = surface->texture->flags;
2646                 //if (LittleShort(in->side))
2647                 //      surface->flags |= SURF_PLANEBACK;
2648                 //surface->plane = loadmodel->brush.data_planes + planenum;
2649
2650                 surface->num_firstvertex = totalverts;
2651                 surface->num_vertices = numedges;
2652                 surface->num_firsttriangle = totaltris;
2653                 surface->num_triangles = numedges - 2;
2654                 totalverts += numedges;
2655                 totaltris += numedges - 2;
2656
2657                 // convert edges back to a normal polygon
2658                 for (i = 0;i < surface->num_vertices;i++)
2659                 {
2660                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
2661                         float s, t;
2662                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
2663                         if (lindex >= 0)
2664                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2665                         else
2666                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2667                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2668                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2669                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
2670                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
2671                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
2672                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
2673                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
2674                 }
2675
2676                 for (i = 0;i < surface->num_triangles;i++)
2677                 {
2678                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
2679                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
2680                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
2681                 }
2682
2683                 // compile additional data about the surface geometry
2684                 Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
2685                 Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
2686                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
2687
2688                 // generate surface extents information
2689                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2690                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2691                 for (i = 1;i < surface->num_vertices;i++)
2692                 {
2693                         for (j = 0;j < 2;j++)
2694                         {
2695                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
2696                                 texmins[j] = min(texmins[j], val);
2697                                 texmaxs[j] = max(texmaxs[j], val);
2698                         }
2699                 }
2700                 for (i = 0;i < 2;i++)
2701                 {
2702                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
2703                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
2704                 }
2705
2706                 smax = surface->lightmapinfo->extents[0] >> 4;
2707                 tmax = surface->lightmapinfo->extents[1] >> 4;
2708                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2709                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2710
2711                 // lighting info
2712                 surface->lightmaptexture = NULL;
2713                 surface->deluxemaptexture = r_texture_blanknormalmap;
2714                 if (lightmapoffset == -1)
2715                 {
2716                         surface->lightmapinfo->samples = NULL;
2717 #if 1
2718                         // give non-lightmapped water a 1x white lightmap
2719                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
2720                         {
2721                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
2722                                 surface->lightmapinfo->styles[0] = 0;
2723                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
2724                         }
2725 #endif
2726                 }
2727                 else if (loadmodel->brush.ishlbsp || loadmodel->brush.isq2bsp) // LadyHavoc: HalfLife map (bsp version 30)
2728                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
2729                 else // LadyHavoc: white lighting (bsp version 29)
2730                 {
2731                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + (lightmapoffset * 3);
2732                         if (loadmodel->brushq1.nmaplightdata)
2733                                 surface->lightmapinfo->nmapsamples = loadmodel->brushq1.nmaplightdata + (lightmapoffset * 3);
2734                 }
2735
2736                 // check if we should apply a lightmap to this
2737                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
2738                 {
2739                         if (ssize > 256 || tsize > 256)
2740                                 Host_Error("Bad surface extents");
2741
2742                         if (lightmapsize < ssize)
2743                                 lightmapsize = ssize;
2744                         if (lightmapsize < tsize)
2745                                 lightmapsize = tsize;
2746
2747                         totallightmapsamples += ssize*tsize;
2748
2749                         // force lightmap upload on first time seeing the surface
2750                         //
2751                         // additionally this is used by the later code to see if a
2752                         // lightmap is needed on this surface (rather than duplicating the
2753                         // logic above)
2754                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
2755                         loadmodel->lit = true;
2756                 }
2757         }
2758
2759         // small maps (such as ammo boxes especially) don't need big lightmap
2760         // textures, so this code tries to guess a good size based on
2761         // totallightmapsamples (size of the lightmaps lump basically), as well as
2762         // trying to max out the size if there is a lot of lightmap data to store
2763         // additionally, never choose a lightmapsize that is smaller than the
2764         // largest surface encountered (as it would fail)
2765         i = lightmapsize;
2766         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
2767                 ;
2768
2769         // now that we've decided the lightmap texture size, we can do the rest
2770         if (cls.state != ca_dedicated)
2771         {
2772                 int stainmapsize = 0;
2773                 mod_alloclightmap_state_t allocState;
2774
2775                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
2776                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2777                 {
2778                         int iu, iv, lightmapx = 0, lightmapy = 0;
2779                         float u, v, ubase, vbase, uscale, vscale;
2780
2781                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2782                                 continue;
2783
2784                         smax = surface->lightmapinfo->extents[0] >> 4;
2785                         tmax = surface->lightmapinfo->extents[1] >> 4;
2786                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2787                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2788                         stainmapsize += ssize * tsize * 3;
2789
2790                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
2791                         {
2792                                 // allocate a texture pool if we need it
2793                                 if (loadmodel->texturepool == NULL)
2794                                         loadmodel->texturepool = R_AllocTexturePool();
2795                                 // could not find room, make a new lightmap
2796                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
2797                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
2798                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
2799                                 loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
2800                                 if (loadmodel->brushq1.nmaplightdata)
2801                                         loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
2802                                 lightmapnumber++;
2803                                 Mod_AllocLightmap_Reset(&allocState);
2804                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
2805                         }
2806                         surface->lightmaptexture = lightmaptexture;
2807                         surface->deluxemaptexture = deluxemaptexture;
2808                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
2809                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
2810
2811                         uscale = 1.0f / (float)lightmapsize;
2812                         vscale = 1.0f / (float)lightmapsize;
2813                         ubase = lightmapx * uscale;
2814                         vbase = lightmapy * vscale;
2815
2816                         for (i = 0;i < surface->num_vertices;i++)
2817                         {
2818                                 u = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3]) + 8 - surface->lightmapinfo->texturemins[0]) * (1.0 / 16.0);
2819                                 v = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3]) + 8 - surface->lightmapinfo->texturemins[1]) * (1.0 / 16.0);
2820                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
2821                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
2822                                 // LadyHavoc: calc lightmap data offset for vertex lighting to use
2823                                 iu = (int) u;
2824                                 iv = (int) v;
2825                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
2826                         }
2827                 }
2828
2829                 if (cl_stainmaps.integer)
2830                 {
2831                         // allocate stainmaps for permanent marks on walls and clear white
2832                         unsigned char *stainsamples = NULL;
2833                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
2834                         memset(stainsamples, 255, stainmapsize);
2835                         // assign pointers
2836                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2837                         {
2838                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2839                                         continue;
2840                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2841                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2842                                 surface->lightmapinfo->stainsamples = stainsamples;
2843                                 stainsamples += ssize * tsize * 3;
2844                         }
2845                 }
2846         }
2847
2848         // generate ushort elements array if possible
2849         if (loadmodel->surfmesh.data_element3s)
2850                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
2851                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
2852 }
2853
2854 static void Mod_BSP_LoadNodes_RecursiveSetParent(mnode_t *node, mnode_t *parent)
2855 {
2856         //if (node->parent)
2857         //      Host_Error("Mod_BSP_LoadNodes_RecursiveSetParent: runaway recursion");
2858         node->parent = parent;
2859         if (node->plane)
2860         {
2861                 // this is a node, recurse to children
2862                 Mod_BSP_LoadNodes_RecursiveSetParent(node->children[0], node);
2863                 Mod_BSP_LoadNodes_RecursiveSetParent(node->children[1], node);
2864                 // combine supercontents of children
2865                 node->combinedsupercontents = node->children[0]->combinedsupercontents | node->children[1]->combinedsupercontents;
2866         }
2867         else
2868         {
2869                 int j;
2870                 mleaf_t *leaf = (mleaf_t *)node;
2871                 // if this is a leaf, calculate supercontents mask from all collidable
2872                 // primitives in the leaf (brushes and collision surfaces)
2873                 // also flag if the leaf contains any collision surfaces
2874                 leaf->combinedsupercontents = 0;
2875                 // combine the supercontents values of all brushes in this leaf
2876                 for (j = 0;j < leaf->numleafbrushes;j++)
2877                         leaf->combinedsupercontents |= loadmodel->brush.data_brushes[leaf->firstleafbrush[j]].texture->supercontents;
2878                 // check if this leaf contains any collision surfaces (q3 patches)
2879                 for (j = 0;j < leaf->numleafsurfaces;j++)
2880                 {
2881                         msurface_t *surface = loadmodel->data_surfaces + leaf->firstleafsurface[j];
2882                         if (surface->num_collisiontriangles)
2883                         {
2884                                 leaf->containscollisionsurfaces = true;
2885                                 leaf->combinedsupercontents |= surface->texture->supercontents;
2886                         }
2887                 }
2888         }
2889 }
2890
2891 static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
2892 {
2893         int                     i, j, count, p, child[2];
2894         mnode_t         *out;
2895         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 24);
2896
2897         if (sb->cursize % structsize)
2898                 Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
2899         count = sb->cursize / structsize;
2900         if (count == 0)
2901                 Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
2902         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2903
2904         loadmodel->brush.data_nodes = out;
2905         loadmodel->brush.num_nodes = count;
2906
2907         for ( i=0 ; i<count ; i++, out++)
2908         {
2909                 p = MSG_ReadLittleLong(sb);
2910                 out->plane = loadmodel->brush.data_planes + p;
2911
2912                 if (loadmodel->brush.isbsp2rmqe)
2913                 {
2914                         child[0] = MSG_ReadLittleLong(sb);
2915                         child[1] = MSG_ReadLittleLong(sb);
2916                         out->mins[0] = MSG_ReadLittleShort(sb);
2917                         out->mins[1] = MSG_ReadLittleShort(sb);
2918                         out->mins[2] = MSG_ReadLittleShort(sb);
2919                         out->maxs[0] = MSG_ReadLittleShort(sb);
2920                         out->maxs[1] = MSG_ReadLittleShort(sb);
2921                         out->maxs[2] = MSG_ReadLittleShort(sb);
2922                         out->firstsurface = MSG_ReadLittleLong(sb);
2923                         out->numsurfaces = MSG_ReadLittleLong(sb);
2924                 }
2925                 else if (loadmodel->brush.isbsp2)
2926                 {
2927                         child[0] = MSG_ReadLittleLong(sb);
2928                         child[1] = MSG_ReadLittleLong(sb);
2929                         out->mins[0] = MSG_ReadLittleFloat(sb);
2930                         out->mins[1] = MSG_ReadLittleFloat(sb);
2931                         out->mins[2] = MSG_ReadLittleFloat(sb);
2932                         out->maxs[0] = MSG_ReadLittleFloat(sb);
2933                         out->maxs[1] = MSG_ReadLittleFloat(sb);
2934                         out->maxs[2] = MSG_ReadLittleFloat(sb);
2935                         out->firstsurface = MSG_ReadLittleLong(sb);
2936                         out->numsurfaces = MSG_ReadLittleLong(sb);
2937                 }
2938                 else
2939                 {
2940                         child[0] = (unsigned short)MSG_ReadLittleShort(sb);
2941                         child[1] = (unsigned short)MSG_ReadLittleShort(sb);
2942                         if (child[0] >= count)
2943                                 child[0] -= 65536;
2944                         if (child[1] >= count)
2945                                 child[1] -= 65536;
2946
2947                         out->mins[0] = MSG_ReadLittleShort(sb);
2948                         out->mins[1] = MSG_ReadLittleShort(sb);
2949                         out->mins[2] = MSG_ReadLittleShort(sb);
2950                         out->maxs[0] = MSG_ReadLittleShort(sb);
2951                         out->maxs[1] = MSG_ReadLittleShort(sb);
2952                         out->maxs[2] = MSG_ReadLittleShort(sb);
2953
2954                         out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
2955                         out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
2956                 }
2957
2958                 for (j=0 ; j<2 ; j++)
2959                 {
2960                         // LadyHavoc: this code supports broken bsp files produced by
2961                         // arguire qbsp which can produce more than 32768 nodes, any value
2962                         // below count is assumed to be a node number, any other value is
2963                         // assumed to be a leaf number
2964                         p = child[j];
2965                         if (p >= 0)
2966                         {
2967                                 if (p < loadmodel->brush.num_nodes)
2968                                         out->children[j] = loadmodel->brush.data_nodes + p;
2969                                 else
2970                                 {
2971                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
2972                                         // map it to the solid leaf
2973                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2974                                 }
2975                         }
2976                         else
2977                         {
2978                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
2979                                 p = -(p+1);
2980                                 if (p < loadmodel->brush.num_leafs)
2981                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
2982                                 else
2983                                 {
2984                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
2985                                         // map it to the solid leaf
2986                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2987                                 }
2988                         }
2989                 }
2990         }
2991
2992         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);        // sets nodes and leafs
2993 }
2994
2995 static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
2996 {
2997         mleaf_t *out;
2998         int i, j, count, p, firstmarksurface, nummarksurfaces;
2999         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 28);
3000
3001         if (sb->cursize % structsize)
3002                 Host_Error("Mod_Q1BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
3003         count = sb->cursize / structsize;
3004         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
3005
3006         loadmodel->brush.data_leafs = out;
3007         loadmodel->brush.num_leafs = count;
3008         // get visleafs from the submodel data
3009         loadmodel->brush.num_pvsclusters = loadmodel->brushq1.submodels[0].visleafs;
3010         loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters+7)>>3;
3011         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
3012         memset(loadmodel->brush.data_pvsclusters, 0xFF, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
3013
3014         // FIXME: this function could really benefit from some error checking
3015         for ( i=0 ; i<count ; i++, out++)
3016         {
3017                 out->contents = MSG_ReadLittleLong(sb);
3018
3019                 out->clusterindex = i - 1;
3020                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
3021                         out->clusterindex = -1;
3022
3023                 p = MSG_ReadLittleLong(sb);
3024                 // ignore visofs errors on leaf 0 (solid)
3025                 if (p >= 0 && out->clusterindex >= 0)
3026                 {
3027                         if (p >= loadmodel->brushq1.num_compressedpvs)
3028                                 Con_Print("Mod_Q1BSP_LoadLeafs: invalid visofs\n");
3029                         else
3030                                 Mod_BSP_DecompressVis(loadmodel->brushq1.data_compressedpvs + p, loadmodel->brushq1.data_compressedpvs + loadmodel->brushq1.num_compressedpvs, loadmodel->brush.data_pvsclusters + out->clusterindex * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (out->clusterindex + 1) * loadmodel->brush.num_pvsclusterbytes);
3031                 }
3032
3033                 if (loadmodel->brush.isbsp2rmqe)
3034                 {
3035                         out->mins[0] = MSG_ReadLittleShort(sb);
3036                         out->mins[1] = MSG_ReadLittleShort(sb);
3037                         out->mins[2] = MSG_ReadLittleShort(sb);
3038                         out->maxs[0] = MSG_ReadLittleShort(sb);
3039                         out->maxs[1] = MSG_ReadLittleShort(sb);
3040                         out->maxs[2] = MSG_ReadLittleShort(sb);
3041
3042                         firstmarksurface = MSG_ReadLittleLong(sb);
3043                         nummarksurfaces = MSG_ReadLittleLong(sb);
3044                 }
3045                 else if (loadmodel->brush.isbsp2)
3046                 {
3047                         out->mins[0] = MSG_ReadLittleFloat(sb);
3048                         out->mins[1] = MSG_ReadLittleFloat(sb);
3049                         out->mins[2] = MSG_ReadLittleFloat(sb);
3050                         out->maxs[0] = MSG_ReadLittleFloat(sb);
3051                         out->maxs[1] = MSG_ReadLittleFloat(sb);
3052                         out->maxs[2] = MSG_ReadLittleFloat(sb);
3053
3054                         firstmarksurface = MSG_ReadLittleLong(sb);
3055                         nummarksurfaces = MSG_ReadLittleLong(sb);
3056                 }
3057                 else
3058                 {
3059                         out->mins[0] = MSG_ReadLittleShort(sb);
3060                         out->mins[1] = MSG_ReadLittleShort(sb);
3061                         out->mins[2] = MSG_ReadLittleShort(sb);
3062                         out->maxs[0] = MSG_ReadLittleShort(sb);
3063                         out->maxs[1] = MSG_ReadLittleShort(sb);
3064                         out->maxs[2] = MSG_ReadLittleShort(sb);
3065
3066                         firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
3067                         nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
3068                 }
3069
3070                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
3071                 {
3072                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
3073                         out->numleafsurfaces = nummarksurfaces;
3074                 }
3075                 else
3076                 {
3077                         Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
3078                         out->firstleafsurface = NULL;
3079                         out->numleafsurfaces = 0;
3080                 }
3081
3082                 for (j = 0;j < 4;j++)
3083                         out->ambient_sound_level[j] = MSG_ReadByte(sb);
3084         }
3085 }
3086
3087 static qbool Mod_Q1BSP_CheckWaterAlphaSupport(void)
3088 {
3089         int i, j;
3090         mleaf_t *leaf;
3091         const unsigned char *pvs;
3092         // if there's no vis data, assume supported (because everything is visible all the time)
3093         if (!loadmodel->brush.data_pvsclusters)
3094                 return true;
3095         // check all liquid leafs to see if they can see into empty leafs, if any
3096         // can we can assume this map supports r_wateralpha
3097         for (i = 0, leaf = loadmodel->brush.data_leafs;i < loadmodel->brush.num_leafs;i++, leaf++)
3098         {
3099                 if ((leaf->contents == CONTENTS_WATER || leaf->contents == CONTENTS_SLIME) && leaf->clusterindex >= 0)
3100                 {
3101                         pvs = loadmodel->brush.data_pvsclusters + leaf->clusterindex * loadmodel->brush.num_pvsclusterbytes;
3102                         for (j = 0;j < loadmodel->brush.num_leafs;j++)
3103                                 if (CHECKPVSBIT(pvs, loadmodel->brush.data_leafs[j].clusterindex) && loadmodel->brush.data_leafs[j].contents == CONTENTS_EMPTY)
3104                                         return true;
3105                 }
3106         }
3107         return false;
3108 }
3109
3110 static void Mod_Q1BSP_LoadClipnodes(sizebuf_t *sb, hullinfo_t *hullinfo)
3111 {
3112         mclipnode_t *out;
3113         int                     i, count;
3114         hull_t          *hull;
3115         int structsize = loadmodel->brush.isbsp2 ? 12 : 8;
3116
3117         if (sb->cursize % structsize)
3118                 Host_Error("Mod_Q1BSP_LoadClipnodes: funny lump size in %s",loadmodel->name);
3119         count = sb->cursize / structsize;
3120         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
3121
3122         loadmodel->brushq1.clipnodes = out;
3123         loadmodel->brushq1.numclipnodes = count;
3124
3125         for (i = 1; i < MAX_MAP_HULLS; i++)
3126         {
3127                 hull = &loadmodel->brushq1.hulls[i];
3128                 hull->clipnodes = out;
3129                 hull->firstclipnode = 0;
3130                 hull->lastclipnode = count-1;
3131                 hull->planes = loadmodel->brush.data_planes;
3132                 hull->clip_mins[0] = hullinfo->hullsizes[i][0][0];
3133                 hull->clip_mins[1] = hullinfo->hullsizes[i][0][1];
3134                 hull->clip_mins[2] = hullinfo->hullsizes[i][0][2];
3135                 hull->clip_maxs[0] = hullinfo->hullsizes[i][1][0];
3136                 hull->clip_maxs[1] = hullinfo->hullsizes[i][1][1];
3137                 hull->clip_maxs[2] = hullinfo->hullsizes[i][1][2];
3138                 VectorSubtract(hull->clip_maxs, hull->clip_mins, hull->clip_size);
3139         }
3140
3141         for (i=0 ; i<count ; i++, out++)
3142         {
3143                 out->planenum = MSG_ReadLittleLong(sb);
3144                 if (out->planenum < 0 || out->planenum >= loadmodel->brush.num_planes)
3145                         Host_Error("%s: Corrupt clipping hull(out of range planenum)", loadmodel->name);
3146                 if (loadmodel->brush.isbsp2)
3147                 {
3148                         out->children[0] = MSG_ReadLittleLong(sb);
3149                         out->children[1] = MSG_ReadLittleLong(sb);
3150                         if (out->children[0] >= count)
3151                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3152                         if (out->children[1] >= count)
3153                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3154                 }
3155                 else
3156                 {
3157                         // LadyHavoc: this code supports arguire qbsp's broken clipnodes indices (more than 32768 clipnodes), values above count are assumed to be contents values
3158                         out->children[0] = (unsigned short)MSG_ReadLittleShort(sb);
3159                         out->children[1] = (unsigned short)MSG_ReadLittleShort(sb);
3160                         if (out->children[0] >= count)
3161                                 out->children[0] -= 65536;
3162                         if (out->children[1] >= count)
3163                                 out->children[1] -= 65536;
3164                 }
3165         }
3166 }
3167
3168 //Duplicate the drawing hull structure as a clipping hull
3169 static void Mod_Q1BSP_MakeHull0(void)
3170 {
3171         mnode_t         *in;
3172         mclipnode_t *out;
3173         int                     i;
3174         hull_t          *hull;
3175
3176         hull = &loadmodel->brushq1.hulls[0];
3177
3178         in = loadmodel->brush.data_nodes;
3179         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(*out));
3180
3181         hull->clipnodes = out;
3182         hull->firstclipnode = 0;
3183         hull->lastclipnode = loadmodel->brush.num_nodes - 1;
3184         hull->planes = loadmodel->brush.data_planes;
3185
3186         for (i = 0;i < loadmodel->brush.num_nodes;i++, out++, in++)
3187         {
3188                 out->planenum = in->plane - loadmodel->brush.data_planes;
3189                 out->children[0] = in->children[0]->plane ? in->children[0] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[0])->contents;
3190                 out->children[1] = in->children[1]->plane ? in->children[1] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[1])->contents;
3191         }
3192 }
3193
3194 static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
3195 {
3196         int i, j;
3197         int structsize = loadmodel->brush.isbsp2 ? 4 : 2;
3198
3199         if (sb->cursize % structsize)
3200                 Host_Error("Mod_Q1BSP_LoadLeaffaces: funny lump size in %s",loadmodel->name);
3201         loadmodel->brush.num_leafsurfaces = sb->cursize / structsize;
3202         loadmodel->brush.data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafsurfaces * sizeof(int));
3203
3204         if (loadmodel->brush.isbsp2)
3205         {
3206                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3207                 {
3208                         j = MSG_ReadLittleLong(sb);
3209                         if (j < 0 || j >= loadmodel->num_surfaces)
3210                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3211                         loadmodel->brush.data_leafsurfaces[i] = j;
3212                 }
3213         }
3214         else
3215         {
3216                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3217                 {
3218                         j = (unsigned short) MSG_ReadLittleShort(sb);
3219                         if (j >= loadmodel->num_surfaces)
3220                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3221                         loadmodel->brush.data_leafsurfaces[i] = j;
3222                 }
3223         }
3224 }
3225
3226 static void Mod_Q1BSP_LoadSurfedges(sizebuf_t *sb)
3227 {
3228         int             i;
3229         int structsize = 4;
3230
3231         if (sb->cursize % structsize)
3232                 Host_Error("Mod_Q1BSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
3233         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
3234         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
3235
3236         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
3237                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
3238 }
3239
3240
3241 static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
3242 {
3243         int                     i;
3244         mplane_t        *out;
3245         int structsize = 20;
3246
3247         if (sb->cursize % structsize)
3248                 Host_Error("Mod_Q1BSP_LoadPlanes: funny lump size in %s", loadmodel->name);
3249         loadmodel->brush.num_planes = sb->cursize / structsize;
3250         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
3251
3252         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
3253         {
3254                 out->normal[0] = MSG_ReadLittleFloat(sb);
3255                 out->normal[1] = MSG_ReadLittleFloat(sb);
3256                 out->normal[2] = MSG_ReadLittleFloat(sb);
3257                 out->dist = MSG_ReadLittleFloat(sb);
3258                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
3259                 PlaneClassify(out);
3260         }
3261 }
3262
3263 // fixes up sky surfaces that have SKY contents behind them, so that they do not cast shadows (e1m5 logo shadow trick).
3264 static void Mod_Q1BSP_AssignNoShadowSkySurfaces(model_t *mod)
3265 {
3266         int surfaceindex;
3267         msurface_t *surface;
3268         vec3_t center;
3269         int contents;
3270         for (surfaceindex = mod->submodelsurfaces_start; surfaceindex < mod->submodelsurfaces_end;surfaceindex++)
3271         {
3272                 surface = mod->data_surfaces + surfaceindex;
3273                 if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
3274                 {
3275                         // check if the point behind the surface polygon is SOLID or SKY contents
3276                         VectorMAMAM(0.5f, surface->mins, 0.5f, surface->maxs, -0.25f, mod->surfmesh.data_normal3f + 3*surface->num_firstvertex, center);
3277                         contents = Mod_Q1BSP_PointSuperContents(mod, 0, center);
3278                         if (!(contents & SUPERCONTENTS_SOLID))
3279                                 surface->texture = surface->texture->skynoshadowtexture;
3280                 }
3281         }
3282 }
3283
3284 static void Mod_Q1BSP_LoadMapBrushes(void)
3285 {
3286 #if 0
3287 // unfinished
3288         int submodel, numbrushes;
3289         qbool firstbrush;
3290         char *text, *maptext;
3291         char mapfilename[MAX_QPATH];
3292         FS_StripExtension (loadmodel->name, mapfilename, sizeof (mapfilename));
3293         strlcat (mapfilename, ".map", sizeof (mapfilename));
3294         maptext = (unsigned char*) FS_LoadFile(mapfilename, tempmempool, false, NULL);
3295         if (!maptext)
3296                 return;
3297         text = maptext;
3298         if (!COM_ParseToken_Simple(&data, false, false, true))
3299                 return; // error
3300         submodel = 0;
3301         for (;;)
3302         {
3303                 if (!COM_ParseToken_Simple(&data, false, false, true))
3304                         break;
3305                 if (com_token[0] != '{')
3306                         return; // error
3307                 // entity
3308                 firstbrush = true;
3309                 numbrushes = 0;
3310                 maxbrushes = 256;
3311                 brushes = Mem_Alloc(loadmodel->mempool, maxbrushes * sizeof(mbrush_t));
3312                 for (;;)
3313                 {
3314                         if (!COM_ParseToken_Simple(&data, false, false, true))
3315                                 return; // error
3316                         if (com_token[0] == '}')
3317                                 break; // end of entity
3318                         if (com_token[0] == '{')
3319                         {
3320                                 // brush
3321                                 if (firstbrush)
3322                                 {
3323                                         if (submodel)
3324                                         {
3325                                                 if (submodel > loadmodel->brush.numsubmodels)
3326                                                 {
3327                                                         Con_Printf("Mod_Q1BSP_LoadMapBrushes: .map has more submodels than .bsp!\n");
3328                                                         model = NULL;
3329                                                 }
3330                                                 else
3331                                                         model = loadmodel->brush.submodels[submodel];
3332                                         }
3333                                         else
3334                                                 model = loadmodel;
3335                                 }
3336                                 for (;;)
3337                                 {
3338                                         if (!COM_ParseToken_Simple(&data, false, false, true))
3339                                                 return; // error
3340                                         if (com_token[0] == '}')
3341                                                 break; // end of brush
3342                                         // each brush face should be this format:
3343                                         // ( x y z ) ( x y z ) ( x y z ) texture scroll_s scroll_t rotateangle scale_s scale_t
3344                                         // FIXME: support hl .map format
3345                                         for (pointnum = 0;pointnum < 3;pointnum++)
3346                                         {
3347                                                 COM_ParseToken_Simple(&data, false, false, true);
3348                                                 for (componentnum = 0;componentnum < 3;componentnum++)
3349                                                 {
3350                                                         COM_ParseToken_Simple(&data, false, false, true);
3351                                                         point[pointnum][componentnum] = atof(com_token);
3352                                                 }
3353                                                 COM_ParseToken_Simple(&data, false, false, true);
3354                                         }
3355                                         COM_ParseToken_Simple(&data, false, false, true);
3356                                         strlcpy(facetexture, com_token, sizeof(facetexture));
3357                                         COM_ParseToken_Simple(&data, false, false, true);
3358                                         //scroll_s = atof(com_token);
3359                                         COM_ParseToken_Simple(&data, false, false, true);
3360                                         //scroll_t = atof(com_token);
3361                                         COM_ParseToken_Simple(&data, false, false, true);
3362                                         //rotate = atof(com_token);
3363                                         COM_ParseToken_Simple(&data, false, false, true);
3364                                         //scale_s = atof(com_token);
3365                                         COM_ParseToken_Simple(&data, false, false, true);
3366                                         //scale_t = atof(com_token);
3367                                         TriangleNormal(point[0], point[1], point[2], planenormal);
3368                                         VectorNormalizeDouble(planenormal);
3369                                         planedist = DotProduct(point[0], planenormal);
3370                                         //ChooseTexturePlane(planenormal, texturevector[0], texturevector[1]);
3371                                 }
3372                                 continue;
3373                         }
3374                 }
3375         }
3376 #endif
3377 }
3378
3379
3380 #define MAX_PORTALPOINTS 64
3381
3382 typedef struct portal_s
3383 {
3384         mplane_t plane;
3385         mnode_t *nodes[2];              // [0] = front side of plane
3386         struct portal_s *next[2];
3387         int numpoints;
3388         double points[3*MAX_PORTALPOINTS];
3389         struct portal_s *chain; // all portals are linked into a list
3390 }
3391 portal_t;
3392
3393 static memexpandablearray_t portalarray;
3394
3395 static void Mod_BSP_RecursiveRecalcNodeBBox(mnode_t *node)
3396 {
3397         // process only nodes (leafs already had their box calculated)
3398         if (!node->plane)
3399                 return;
3400
3401         // calculate children first
3402         Mod_BSP_RecursiveRecalcNodeBBox(node->children[0]);
3403         Mod_BSP_RecursiveRecalcNodeBBox(node->children[1]);
3404
3405         // make combined bounding box from children
3406         node->mins[0] = min(node->children[0]->mins[0], node->children[1]->mins[0]);
3407         node->mins[1] = min(node->children[0]->mins[1], node->children[1]->mins[1]);
3408         node->mins[2] = min(node->children[0]->mins[2], node->children[1]->mins[2]);
3409         node->maxs[0] = max(node->children[0]->maxs[0], node->children[1]->maxs[0]);
3410         node->maxs[1] = max(node->children[0]->maxs[1], node->children[1]->maxs[1]);
3411         node->maxs[2] = max(node->children[0]->maxs[2], node->children[1]->maxs[2]);
3412 }
3413
3414 static void Mod_BSP_FinalizePortals(void)
3415 {
3416         int i, j, numportals, numpoints, portalindex, portalrange = (int)Mem_ExpandableArray_IndexRange(&portalarray);
3417         portal_t *p;
3418         mportal_t *portal;
3419         mvertex_t *point;
3420         mleaf_t *leaf, *endleaf;
3421
3422         // tally up portal and point counts and recalculate bounding boxes for all
3423         // leafs (because qbsp is very sloppy)
3424         leaf = loadmodel->brush.data_leafs;
3425         endleaf = leaf + loadmodel->brush.num_leafs;
3426         if (mod_recalculatenodeboxes.integer)
3427         {
3428                 for (;leaf < endleaf;leaf++)
3429                 {
3430                         VectorSet(leaf->mins,  2000000000,  2000000000,  2000000000);
3431                         VectorSet(leaf->maxs, -2000000000, -2000000000, -2000000000);
3432                 }
3433         }
3434         numportals = 0;
3435         numpoints = 0;
3436         for (portalindex = 0;portalindex < portalrange;portalindex++)
3437         {
3438                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3439                 if (!p)
3440                         continue;
3441                 // note: this check must match the one below or it will usually corrupt memory
3442                 // the nodes[0] != nodes[1] check is because leaf 0 is the shared solid leaf, it can have many portals inside with leaf 0 on both sides
3443                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1] && ((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3444                 {
3445                         numportals += 2;
3446                         numpoints += p->numpoints * 2;
3447                 }
3448         }
3449         loadmodel->brush.data_portals = (mportal_t *)Mem_Alloc(loadmodel->mempool, numportals * sizeof(mportal_t) + numpoints * sizeof(mvertex_t));
3450         loadmodel->brush.num_portals = numportals;
3451         loadmodel->brush.data_portalpoints = (mvertex_t *)((unsigned char *) loadmodel->brush.data_portals + numportals * sizeof(mportal_t));
3452         loadmodel->brush.num_portalpoints = numpoints;
3453         // clear all leaf portal chains
3454         for (i = 0;i < loadmodel->brush.num_leafs;i++)
3455                 loadmodel->brush.data_leafs[i].portals = NULL;
3456         // process all portals in the global portal chain, while freeing them
3457         portal = loadmodel->brush.data_portals;
3458         point = loadmodel->brush.data_portalpoints;
3459         for (portalindex = 0;portalindex < portalrange;portalindex++)
3460         {
3461                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3462                 if (!p)
3463                         continue;
3464                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1])
3465                 {
3466                         // note: this check must match the one above or it will usually corrupt memory
3467                         // the nodes[0] != nodes[1] check is because leaf 0 is the shared solid leaf, it can have many portals inside with leaf 0 on both sides
3468                         if (((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3469                         {
3470                                 // first make the back to front portal(forward portal)
3471                                 portal->points = point;
3472                                 portal->numpoints = p->numpoints;
3473                                 portal->plane.dist = p->plane.dist;
3474                                 VectorCopy(p->plane.normal, portal->plane.normal);
3475                                 portal->here = (mleaf_t *)p->nodes[1];
3476                                 portal->past = (mleaf_t *)p->nodes[0];
3477                                 // copy points
3478                                 for (j = 0;j < portal->numpoints;j++)
3479                                 {
3480                                         VectorCopy(p->points + j*3, point->position);
3481                                         point++;
3482                                 }
3483                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3484                                 PlaneClassify(&portal->plane);
3485
3486                                 // link into leaf's portal chain
3487                                 portal->next = portal->here->portals;
3488                                 portal->here->portals = portal;
3489
3490                                 // advance to next portal
3491                                 portal++;
3492
3493                                 // then make the front to back portal(backward portal)
3494                                 portal->points = point;
3495                                 portal->numpoints = p->numpoints;
3496                                 portal->plane.dist = -p->plane.dist;
3497                                 VectorNegate(p->plane.normal, portal->plane.normal);
3498                                 portal->here = (mleaf_t *)p->nodes[0];
3499                                 portal->past = (mleaf_t *)p->nodes[1];
3500                                 // copy points
3501                                 for (j = portal->numpoints - 1;j >= 0;j--)
3502                                 {
3503                                         VectorCopy(p->points + j*3, point->position);
3504                                         point++;
3505                                 }
3506                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3507                                 PlaneClassify(&portal->plane);
3508
3509                                 // link into leaf's portal chain
3510                                 portal->next = portal->here->portals;
3511                                 portal->here->portals = portal;
3512
3513                                 // advance to next portal
3514                                 portal++;
3515                         }
3516                         // add the portal's polygon points to the leaf bounding boxes
3517                         if (mod_recalculatenodeboxes.integer)
3518                         {
3519                                 for (i = 0;i < 2;i++)
3520                                 {
3521                                         leaf = (mleaf_t *)p->nodes[i];
3522                                         for (j = 0;j < p->numpoints;j++)
3523                                         {
3524                                                 if (leaf->mins[0] > p->points[j*3+0]) leaf->mins[0] = p->points[j*3+0];
3525                                                 if (leaf->mins[1] > p->points[j*3+1]) leaf->mins[1] = p->points[j*3+1];
3526                                                 if (leaf->mins[2] > p->points[j*3+2]) leaf->mins[2] = p->points[j*3+2];
3527                                                 if (leaf->maxs[0] < p->points[j*3+0]) leaf->maxs[0] = p->points[j*3+0];
3528                                                 if (leaf->maxs[1] < p->points[j*3+1]) leaf->maxs[1] = p->points[j*3+1];
3529                                                 if (leaf->maxs[2] < p->points[j*3+2]) leaf->maxs[2] = p->points[j*3+2];
3530                                         }
3531                                 }
3532                         }
3533                 }
3534         }
3535         // now recalculate the node bounding boxes from the leafs
3536         if (mod_recalculatenodeboxes.integer)
3537                 Mod_BSP_RecursiveRecalcNodeBBox(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3538 }
3539
3540 /*
3541 =============
3542 AddPortalToNodes
3543 =============
3544 */
3545 static void AddPortalToNodes(portal_t *p, mnode_t *front, mnode_t *back)
3546 {
3547         if (!front)
3548                 Host_Error("AddPortalToNodes: NULL front node");
3549         if (!back)
3550                 Host_Error("AddPortalToNodes: NULL back node");
3551         if (p->nodes[0] || p->nodes[1])
3552                 Host_Error("AddPortalToNodes: already included");
3553         // note: front == back is handled gracefully, because leaf 0 is the shared solid leaf, it can often have portals with the same leaf on both sides
3554
3555         p->nodes[0] = front;
3556         p->next[0] = (portal_t *)front->portals;
3557         front->portals = (mportal_t *)p;
3558
3559         p->nodes[1] = back;
3560         p->next[1] = (portal_t *)back->portals;
3561         back->portals = (mportal_t *)p;
3562 }
3563
3564 /*
3565 =============
3566 RemovePortalFromNode
3567 =============
3568 */
3569 static void RemovePortalFromNodes(portal_t *portal)
3570 {
3571         int i;
3572         mnode_t *node;
3573         void **portalpointer;
3574         portal_t *t;
3575         for (i = 0;i < 2;i++)
3576         {
3577                 node = portal->nodes[i];
3578
3579                 portalpointer = (void **) &node->portals;
3580                 while (1)
3581                 {
3582                         t = (portal_t *)*portalpointer;
3583                         if (!t)
3584                                 Host_Error("RemovePortalFromNodes: portal not in leaf");
3585
3586                         if (t == portal)
3587                         {
3588                                 if (portal->nodes[0] == node)
3589                                 {
3590                                         *portalpointer = portal->next[0];
3591                                         portal->nodes[0] = NULL;
3592                                 }
3593                                 else if (portal->nodes[1] == node)
3594                                 {
3595                                         *portalpointer = portal->next[1];
3596                                         portal->nodes[1] = NULL;
3597                                 }
3598                                 else
3599                                         Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3600                                 break;
3601                         }
3602
3603                         if (t->nodes[0] == node)
3604                                 portalpointer = (void **) &t->next[0];
3605                         else if (t->nodes[1] == node)
3606                                 portalpointer = (void **) &t->next[1];
3607                         else
3608                                 Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3609                 }
3610         }
3611 }
3612
3613 #define PORTAL_DIST_EPSILON (1.0 / 32.0)
3614 static double *portalpointsbuffer;
3615 static int portalpointsbufferoffset;
3616 static int portalpointsbuffersize;
3617 static void Mod_BSP_RecursiveNodePortals(mnode_t *node)
3618 {
3619         int i, side;
3620         mnode_t *front, *back, *other_node;
3621         mplane_t clipplane, *plane;
3622         portal_t *portal, *nextportal, *nodeportal, *splitportal, *temp;
3623         int numfrontpoints, numbackpoints;
3624         double *frontpoints, *backpoints;
3625
3626         // if a leaf, we're done
3627         if (!node->plane)
3628                 return;
3629
3630         // get some space for our clipping operations to use
3631         if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
3632         {
3633                 portalpointsbuffersize = portalpointsbufferoffset * 2;
3634                 portalpointsbuffer = (double *)Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3635         }
3636         frontpoints = portalpointsbuffer + portalpointsbufferoffset;
3637         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3638         backpoints = portalpointsbuffer + portalpointsbufferoffset;
3639         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3640
3641         plane = node->plane;
3642
3643         front = node->children[0];
3644         back = node->children[1];
3645         if (front == back)
3646                 Host_Error("Mod_BSP_RecursiveNodePortals: corrupt node hierarchy");
3647
3648         // create the new portal by generating a polygon for the node plane,
3649         // and clipping it by all of the other portals(which came from nodes above this one)
3650         nodeportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3651         nodeportal->plane = *plane;
3652
3653         // TODO: calculate node bounding boxes during recursion and calculate a maximum plane size accordingly to improve precision (as most maps do not need 1 billion unit plane polygons)
3654         PolygonD_QuadForPlane(nodeportal->points, nodeportal->plane.normal[0], nodeportal->plane.normal[1], nodeportal->plane.normal[2], nodeportal->plane.dist, 1024.0*1024.0*1024.0);
3655         nodeportal->numpoints = 4;
3656
3657         for (portal = (portal_t *)node->portals;portal;portal = portal->next[side])
3658         {
3659                 clipplane = portal->plane;
3660                 if (portal->nodes[0] == portal->nodes[1])
3661                         Host_Error("Mod_BSP_RecursiveNodePortals: portal has same node on both sides(1)");
3662                 if (portal->nodes[0] == node)
3663                         side = 0;
3664                 else if (portal->nodes[1] == node)
3665                 {
3666                         clipplane.dist = -clipplane.dist;
3667                         VectorNegate(clipplane.normal, clipplane.normal);
3668                         side = 1;
3669                 }
3670                 else
3671                 {
3672                         Host_Error("Mod_BSP_RecursiveNodePortals: mislinked portal");
3673                         side = 0; // hush warning
3674                 }
3675
3676                 for (i = 0;i < nodeportal->numpoints*3;i++)
3677                         frontpoints[i] = nodeportal->points[i];
3678                 PolygonD_Divide(nodeportal->numpoints, frontpoints, clipplane.normal[0], clipplane.normal[1], clipplane.normal[2], clipplane.dist, PORTAL_DIST_EPSILON, MAX_PORTALPOINTS, nodeportal->points, &nodeportal->numpoints, 0, NULL, NULL, NULL);
3679                 if (nodeportal->numpoints <= 0 || nodeportal->numpoints >= MAX_PORTALPOINTS)
3680                         break;
3681         }
3682
3683         if (nodeportal->numpoints < 3)
3684         {
3685                 Con_Print(CON_WARN "Mod_BSP_RecursiveNodePortals: WARNING: new portal was clipped away\n");
3686                 nodeportal->numpoints = 0;
3687         }
3688         else if (nodeportal->numpoints >= MAX_PORTALPOINTS)
3689         {
3690                 Con_Print(CON_WARN "Mod_BSP_RecursiveNodePortals: WARNING: new portal has too many points\n");
3691                 nodeportal->numpoints = 0;
3692         }
3693
3694         AddPortalToNodes(nodeportal, front, back);
3695
3696         // split the portals of this node along this node's plane and assign them to the children of this node
3697         // (migrating the portals downward through the tree)
3698         for (portal = (portal_t *)node->portals;portal;portal = nextportal)
3699         {
3700                 if (portal->nodes[0] == portal->nodes[1])
3701                         Host_Error("Mod_BSP_RecursiveNodePortals: portal has same node on both sides(2)");
3702                 if (portal->nodes[0] == node)
3703                         side = 0;
3704                 else if (portal->nodes[1] == node)
3705                         side = 1;
3706                 else
3707                 {
3708                         Host_Error("Mod_BSP_RecursiveNodePortals: mislinked portal");
3709                         side = 0; // hush warning
3710                 }
3711                 nextportal = portal->next[side];
3712                 if (!portal->numpoints)
3713                         continue;
3714
3715                 other_node = portal->nodes[!side];
3716                 RemovePortalFromNodes(portal);
3717
3718                 // cut the portal into two portals, one on each side of the node plane
3719                 PolygonD_Divide(portal->numpoints, portal->points, plane->normal[0], plane->normal[1], plane->normal[2], plane->dist, PORTAL_DIST_EPSILON, MAX_PORTALPOINTS, frontpoints, &numfrontpoints, MAX_PORTALPOINTS, backpoints, &numbackpoints, NULL);
3720
3721                 if (!numfrontpoints)
3722                 {
3723                         if (side == 0)
3724                                 AddPortalToNodes(portal, back, other_node);
3725                         else
3726                                 AddPortalToNodes(portal, other_node, back);
3727                         continue;
3728                 }
3729                 if (!numbackpoints)
3730                 {
3731                         if (side == 0)
3732                                 AddPortalToNodes(portal, front, other_node);
3733                         else
3734                                 AddPortalToNodes(portal, other_node, front);
3735                         continue;
3736                 }
3737
3738                 // the portal is split
3739                 splitportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3740                 temp = splitportal->chain;
3741                 *splitportal = *portal;
3742                 splitportal->chain = temp;
3743                 for (i = 0;i < numbackpoints*3;i++)
3744                         splitportal->points[i] = backpoints[i];
3745                 splitportal->numpoints = numbackpoints;
3746                 for (i = 0;i < numfrontpoints*3;i++)
3747                         portal->points[i] = frontpoints[i];
3748                 portal->numpoints = numfrontpoints;
3749
3750                 if (side == 0)
3751                 {
3752                         AddPortalToNodes(portal, front, other_node);
3753                         AddPortalToNodes(splitportal, back, other_node);
3754                 }
3755                 else
3756                 {
3757                         AddPortalToNodes(portal, other_node, front);
3758                         AddPortalToNodes(splitportal, other_node, back);
3759                 }
3760         }
3761
3762         Mod_BSP_RecursiveNodePortals(front);
3763         Mod_BSP_RecursiveNodePortals(back);
3764
3765         portalpointsbufferoffset -= 6*MAX_PORTALPOINTS;
3766 }
3767
3768 static void Mod_BSP_MakePortals(void)
3769 {
3770         Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
3771         portalpointsbufferoffset = 0;
3772         portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
3773         portalpointsbuffer = (double *)Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3774         Mod_BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3775         Mem_Free(portalpointsbuffer);
3776         portalpointsbuffer = NULL;
3777         portalpointsbufferoffset = 0;
3778         portalpointsbuffersize = 0;
3779         Mod_BSP_FinalizePortals();
3780         Mem_ExpandableArray_FreeArray(&portalarray);
3781 }
3782
3783 //Returns PVS data for a given point
3784 //(note: can return NULL)
3785 static unsigned char *Mod_BSP_GetPVS(model_t *model, const vec3_t p)
3786 {
3787         mnode_t *node;
3788         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
3789         while (node->plane)
3790                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
3791         if (((mleaf_t *)node)->clusterindex >= 0)
3792                 return model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3793         else
3794                 return NULL;
3795 }
3796
3797 static void Mod_BSP_FatPVS_RecursiveBSPNode(model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbytes, mnode_t *node)
3798 {
3799         while (node->plane)
3800         {
3801                 float d = PlaneDiff(org, node->plane);
3802                 if (d > radius)
3803                         node = node->children[0];
3804                 else if (d < -radius)
3805                         node = node->children[1];
3806                 else
3807                 {
3808                         // go down both sides
3809                         Mod_BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, pvsbytes, node->children[0]);
3810                         node = node->children[1];
3811                 }
3812         }
3813         // if this leaf is in a cluster, accumulate the pvs bits
3814         if (((mleaf_t *)node)->clusterindex >= 0)
3815         {
3816                 int i;
3817                 unsigned char *pvs = model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3818                 for (i = 0;i < pvsbytes;i++)
3819                         pvsbuffer[i] |= pvs[i];
3820         }
3821 }
3822
3823 //Calculates a PVS that is the inclusive or of all leafs within radius pixels
3824 //of the given point.
3825 static size_t Mod_BSP_FatPVS(model_t *model, const vec3_t org, vec_t radius, unsigned char **pvsbuffer, mempool_t *pool, qbool merge)
3826 {
3827         size_t bytes = model->brush.num_pvsclusterbytes;
3828
3829         if (!*pvsbuffer || bytes != Mem_Size(*pvsbuffer))
3830         {
3831 //              Con_Printf("^4FatPVS: allocating a%s ^4buffer in pool %s, old size %zu new size %zu\n", *pvsbuffer == NULL ? " ^5NEW" : "", pool->name, *pvsbuffer != NULL ? Mem_Size(*pvsbuffer) : 0, bytes);
3832                 if (*pvsbuffer)
3833                         Mem_Free(*pvsbuffer); // don't reuse stale data when the worldmodel changes
3834                 *pvsbuffer = Mem_AllocType(pool, unsigned char, bytes);
3835         }
3836
3837         if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_BSP_GetPVS(model, org))
3838         {
3839                 memset(*pvsbuffer, 0xFF, bytes);
3840                 return bytes;
3841         }
3842         if (!merge)
3843                 memset(*pvsbuffer, 0, bytes);
3844         Mod_BSP_FatPVS_RecursiveBSPNode(model, org, radius, *pvsbuffer, bytes, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
3845         return bytes;
3846 }
3847
3848 static void Mod_Q1BSP_RoundUpToHullSize(model_t *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs)
3849 {
3850         vec3_t size;
3851         const hull_t *hull;
3852
3853         VectorSubtract(inmaxs, inmins, size);
3854         if (size[0] < mod_q1bsp_zero_hullsize_cutoff.value)
3855                 hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3856         else if (cmodel->brush.ishlbsp)
3857         {
3858                 if (size[0] <= 32)
3859                 {
3860                         if (size[2] < 54) // pick the nearest of 36 or 72
3861                                 hull = &cmodel->brushq1.hulls[3]; // 32x32x36
3862                         else
3863                                 hull = &cmodel->brushq1.hulls[1]; // 32x32x72
3864                 }
3865                 else
3866                         hull = &cmodel->brushq1.hulls[2]; // 64x64x64
3867         }
3868         else
3869         {
3870                 if (size[0] <= 32)
3871                         hull = &cmodel->brushq1.hulls[1]; // 32x32x56
3872                 else
3873                         hull = &cmodel->brushq1.hulls[2]; // 64x64x88
3874         }
3875         VectorCopy(inmins, outmins);
3876         VectorAdd(inmins, hull->clip_size, outmaxs);
3877 }
3878
3879 void Mod_CollisionBIH_TraceLineAgainstSurfaces(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask);
3880
3881 void Mod_2PSB_Load(model_t *mod, void *buffer, void *bufferend)
3882 {
3883         mod->brush.isbsp2 = true;
3884         mod->brush.isbsp2rmqe = true; // like bsp2 except leaf/node bounds are 16bit (unexpanded)
3885         mod->modeldatatypestring = "Q1BSP2rmqe";
3886         Mod_Q1BSP_Load(mod, buffer, bufferend);
3887 }
3888
3889 void Mod_BSP2_Load(model_t *mod, void *buffer, void *bufferend)
3890 {
3891         mod->brush.isbsp2 = true;
3892         mod->modeldatatypestring = "Q1BSP2";
3893         Mod_Q1BSP_Load(mod, buffer, bufferend);
3894 }
3895
3896 void Mod_HLBSP_Load(model_t *mod, void *buffer, void *bufferend)
3897 {
3898         mod->brush.ishlbsp = true;
3899         mod->modeldatatypestring = "HLBSP";
3900         Mod_Q1BSP_Load(mod, buffer, bufferend);
3901 }
3902
3903 void Mod_Q1BSP_Load(model_t *mod, void *buffer, void *bufferend)
3904 {
3905         int i, j, k;
3906         sizebuf_t lumpsb[HEADER_LUMPS];
3907         mmodel_t *bm;
3908         float dist, modelyawradius, modelradius;
3909         msurface_t *surface;
3910         hullinfo_t hullinfo;
3911         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
3912         model_brush_lightstyleinfo_t styleinfo[256];
3913         int *datapointer;
3914         model_brush_lightstyleinfo_t *lsidatapointer;
3915         sizebuf_t sb;
3916
3917         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
3918
3919         mod->type = mod_brushq1;
3920
3921         mod->brush.skymasking = true;
3922         i = MSG_ReadLittleLong(&sb);
3923
3924         if(!mod->modeldatatypestring)
3925                 mod->modeldatatypestring = "Q1BSP";
3926
3927 // fill in hull info
3928         VectorClear (hullinfo.hullsizes[0][0]);
3929         VectorClear (hullinfo.hullsizes[0][1]);
3930         if (mod->brush.ishlbsp)
3931         {
3932                 hullinfo.filehulls = 4;
3933                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -36);
3934                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 36);
3935                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -32);
3936                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 32);
3937                 VectorSet (hullinfo.hullsizes[3][0], -16, -16, -18);
3938                 VectorSet (hullinfo.hullsizes[3][1], 16, 16, 18);
3939         }
3940         else
3941         {
3942                 hullinfo.filehulls = 4;
3943                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -24);
3944                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 32);
3945                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -24);
3946                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 64);
3947         }
3948
3949 // read lumps
3950         for (i = 0; i < HEADER_LUMPS; i++)
3951         {
3952                 int offset = MSG_ReadLittleLong(&sb);
3953                 int size = MSG_ReadLittleLong(&sb);
3954                 if (offset < 0 || offset + size > sb.cursize)
3955                         Host_Error("Mod_Q1BSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
3956                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
3957         }
3958
3959         mod->soundfromcenter = true;
3960         mod->TraceBox = Mod_Q1BSP_TraceBox;
3961         mod->TraceLine = Mod_Q1BSP_TraceLine;
3962         mod->TracePoint = Mod_Q1BSP_TracePoint;
3963         mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
3964         mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
3965         mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
3966         mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
3967         mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
3968         mod->brush.GetPVS = Mod_BSP_GetPVS;
3969         mod->brush.FatPVS = Mod_BSP_FatPVS;
3970         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
3971         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
3972         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
3973         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
3974         mod->brush.LightPoint = Mod_BSP_LightPoint;
3975         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
3976         mod->brush.AmbientSoundLevelsForPoint = Mod_Q1BSP_AmbientSoundLevelsForPoint;
3977         mod->brush.RoundUpToHullSize = Mod_Q1BSP_RoundUpToHullSize;
3978         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
3979         mod->Draw = R_Mod_Draw;
3980         mod->DrawDepth = R_Mod_DrawDepth;
3981         mod->DrawDebug = R_Mod_DrawDebug;
3982         mod->DrawPrepass = R_Mod_DrawPrepass;
3983         mod->GetLightInfo = R_Mod_GetLightInfo;
3984         mod->CompileShadowMap = R_Mod_CompileShadowMap;
3985         mod->DrawShadowMap = R_Mod_DrawShadowMap;
3986         mod->DrawLight = R_Mod_DrawLight;
3987
3988 // load into heap
3989
3990         mod->brush.qw_md4sum = 0;
3991         mod->brush.qw_md4sum2 = 0;
3992         for (i = 0;i < HEADER_LUMPS;i++)
3993         {
3994                 int temp;
3995                 if (i == LUMP_ENTITIES)
3996                         continue;
3997                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
3998                 mod->brush.qw_md4sum ^= LittleLong(temp);
3999                 if (i == LUMP_VISIBILITY || i == LUMP_LEAFS || i == LUMP_NODES)
4000                         continue;
4001                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
4002         }
4003
4004         Mod_Q1BSP_LoadEntities(&lumpsb[LUMP_ENTITIES]);
4005         Mod_Q1BSP_LoadVertexes(&lumpsb[LUMP_VERTEXES]);
4006         Mod_Q1BSP_LoadEdges(&lumpsb[LUMP_EDGES]);
4007         Mod_Q1BSP_LoadSurfedges(&lumpsb[LUMP_SURFEDGES]);
4008         Mod_Q1BSP_LoadTextures(&lumpsb[LUMP_TEXTURES]);
4009         Mod_Q1BSP_LoadLighting(&lumpsb[LUMP_LIGHTING]);
4010         Mod_Q1BSP_LoadPlanes(&lumpsb[LUMP_PLANES]);
4011         Mod_Q1BSP_LoadTexinfo(&lumpsb[LUMP_TEXINFO]);
4012         Mod_Q1BSP_LoadFaces(&lumpsb[LUMP_FACES]);
4013         Mod_Q1BSP_LoadLeaffaces(&lumpsb[LUMP_MARKSURFACES]);
4014         Mod_Q1BSP_LoadVisibility(&lumpsb[LUMP_VISIBILITY]);
4015         // load submodels before leafs because they contain the number of vis leafs
4016         Mod_BSP_LoadSubmodels(&lumpsb[LUMP_MODELS], &hullinfo);
4017         Mod_Q1BSP_LoadLeafs(&lumpsb[LUMP_LEAFS]);
4018         Mod_Q1BSP_LoadNodes(&lumpsb[LUMP_NODES]);
4019         Mod_Q1BSP_LoadClipnodes(&lumpsb[LUMP_CLIPNODES], &hullinfo);
4020
4021         for (i = 0; i < HEADER_LUMPS; i++)
4022                 if (lumpsb[i].readcount != lumpsb[i].cursize && i != LUMP_TEXTURES && i != LUMP_LIGHTING)
4023                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4024
4025         // check if the map supports transparent water rendering
4026         loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
4027
4028         // we don't need the compressed pvs data anymore
4029         if (mod->brushq1.data_compressedpvs)
4030                 Mem_Free(mod->brushq1.data_compressedpvs);
4031         mod->brushq1.data_compressedpvs = NULL;
4032         mod->brushq1.num_compressedpvs = 0;
4033
4034         Mod_Q1BSP_MakeHull0();
4035         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
4036                 Mod_BSP_MakePortals();
4037
4038         mod->numframes = 2;             // regular and alternate animation
4039         mod->numskins = 1;
4040
4041         if (loadmodel->brush.numsubmodels)
4042                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4043
4044         // LadyHavoc: to clear the fog around the original quake submodel code, I
4045         // will explain:
4046         // first of all, some background info on the submodels:
4047         // model 0 is the map model (the world, named maps/e1m1.bsp for example)
4048         // model 1 and higher are submodels (doors and the like, named *1, *2, etc)
4049         // now the weird for loop itself:
4050         // the loop functions in an odd way, on each iteration it sets up the
4051         // current 'mod' model (which despite the confusing code IS the model of
4052         // the number i), at the end of the loop it duplicates the model to become
4053         // the next submodel, and loops back to set up the new submodel.
4054
4055         // LadyHavoc: now the explanation of my sane way (which works identically):
4056         // set up the world model, then on each submodel copy from the world model
4057         // and set up the submodel with the respective model info.
4058         totalstylesurfaces = 0;
4059         totalstyles = 0;
4060         for (i = 0;i < mod->brush.numsubmodels;i++)
4061         {
4062                 memset(stylecounts, 0, sizeof(stylecounts));
4063                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4064                 {
4065                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4066                         for (j = 0;j < MAXLIGHTMAPS;j++)
4067                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4068                 }
4069                 for (k = 0;k < 255;k++)
4070                 {
4071                         totalstyles++;
4072                         if (stylecounts[k])
4073                                 totalstylesurfaces += stylecounts[k];
4074                 }
4075         }
4076         // bones_was_here: using a separate allocation for model_brush_lightstyleinfo_t
4077         // because on a 64-bit machine it no longer has the same alignment requirement as int.
4078         lsidatapointer = Mem_AllocType(mod->mempool, model_brush_lightstyleinfo_t, totalstyles * sizeof(model_brush_lightstyleinfo_t));
4079         datapointer = Mem_AllocType(mod->mempool, int, mod->num_surfaces * sizeof(int) + totalstylesurfaces * sizeof(int));
4080         mod->modelsurfaces_sorted = datapointer;datapointer += mod->num_surfaces;
4081         for (i = 0;i < mod->brush.numsubmodels;i++)
4082         {
4083                 // LadyHavoc: this code was originally at the end of this loop, but
4084                 // has been transformed to something more readable at the start here.
4085
4086                 if (i > 0)
4087                 {
4088                         char name[10];
4089                         // duplicate the basic information
4090                         dpsnprintf(name, sizeof(name), "*%i", i);
4091                         mod = Mod_FindName(name, loadmodel->name);
4092                         // copy the base model to this one
4093                         *mod = *loadmodel;
4094                         // rename the clone back to its proper name
4095                         dp_strlcpy(mod->name, name, sizeof(mod->name));
4096                         mod->brush.parentmodel = loadmodel;
4097                         // textures and memory belong to the main model
4098                         mod->texturepool = NULL;
4099                         mod->mempool = NULL;
4100                         mod->brush.GetPVS = NULL;
4101                         mod->brush.FatPVS = NULL;
4102                         mod->brush.BoxTouchingPVS = NULL;
4103                         mod->brush.BoxTouchingLeafPVS = NULL;
4104                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4105                         mod->brush.FindBoxClusters = NULL;
4106                         mod->brush.LightPoint = NULL;
4107                         mod->brush.AmbientSoundLevelsForPoint = NULL;
4108                 }
4109
4110                 mod->brush.submodel = i;
4111
4112                 if (loadmodel->brush.submodels)
4113                         loadmodel->brush.submodels[i] = mod;
4114
4115                 bm = &mod->brushq1.submodels[i];
4116
4117                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
4118                 for (j=1 ; j<MAX_MAP_HULLS ; j++)
4119                 {
4120                         mod->brushq1.hulls[j].firstclipnode = bm->headnode[j];
4121                         mod->brushq1.hulls[j].lastclipnode = mod->brushq1.numclipnodes - 1;
4122                 }
4123
4124                 mod->submodelsurfaces_start = bm->firstface;
4125                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
4126
4127                 // set node/leaf parents for this submodel
4128                 Mod_BSP_LoadNodes_RecursiveSetParent(mod->brush.data_nodes + mod->brushq1.hulls[0].firstclipnode, NULL);
4129
4130                 // this has to occur after hull info has been set, as it uses Mod_Q1BSP_PointSuperContents
4131                 Mod_Q1BSP_AssignNoShadowSkySurfaces(mod);
4132
4133                 // copy the submodel bounds, then enlarge the yaw and rotated bounds according to radius
4134                 // (previously this code measured the radius of the vertices of surfaces in the submodel, but that broke submodels that contain only CLIP brushes, which do not produce surfaces)
4135                 VectorCopy(bm->mins, mod->normalmins);
4136                 VectorCopy(bm->maxs, mod->normalmaxs);
4137                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
4138                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
4139                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
4140                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
4141                 modelradius = modelyawradius + modelradius * modelradius;
4142                 modelyawradius = sqrt(modelyawradius);
4143                 modelradius = sqrt(modelradius);
4144                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
4145                 mod->yawmins[2] = mod->normalmins[2];
4146                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
4147                 mod->yawmaxs[2] = mod->normalmaxs[2];
4148                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
4149                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
4150                 mod->radius = modelradius;
4151                 mod->radius2 = modelradius * modelradius;
4152
4153                 Mod_SetDrawSkyAndWater(mod);
4154
4155                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
4156                 {
4157                         // build lightstyle update chains
4158                         // (used to rapidly mark lightmapupdateflags on many surfaces
4159                         // when d_lightstylevalue changes)
4160                         memset(stylecounts, 0, sizeof(stylecounts));
4161                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4162                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4163                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
4164                         mod->brushq1.num_lightstyles = 0;
4165                         for (k = 0;k < 255;k++)
4166                         {
4167                                 if (stylecounts[k])
4168                                 {
4169                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
4170                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
4171                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
4172                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = datapointer;datapointer += stylecounts[k];
4173                                         remapstyles[k] = mod->brushq1.num_lightstyles;
4174                                         mod->brushq1.num_lightstyles++;
4175                                 }
4176                         }
4177                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4178                         {
4179                                 surface = mod->data_surfaces + k;
4180                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4181                                 {
4182                                         if (surface->lightmapinfo->styles[j] != 255)
4183                                         {
4184                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
4185                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
4186                                         }
4187                                 }
4188                         }
4189                         mod->brushq1.data_lightstyleinfo = lsidatapointer;lsidatapointer += mod->brushq1.num_lightstyles;
4190                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
4191                 }
4192                 else
4193                 {
4194                         // LadyHavoc: empty submodel(lacrima.bsp has such a glitch)
4195                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
4196                 }
4197                 //mod->brushq1.num_visleafs = bm->visleafs;
4198
4199                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
4200                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
4201
4202                 if (mod_q1bsp_polygoncollisions.integer)
4203                 {
4204                         mod->collision_bih = mod->render_bih;
4205                         // point traces and contents checks still use the bsp tree
4206                         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4207                         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4208                         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4209                         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
4210                 }
4211
4212                 // generate VBOs and other shared data before cloning submodels
4213                 if (i == 0)
4214                 {
4215                         Mod_BuildVBOs();
4216                         Mod_Q1BSP_LoadMapBrushes();
4217                         //Mod_Q1BSP_ProcessLightList();
4218                 }
4219         }
4220         mod = loadmodel;
4221
4222         // make the model surface list (used by shadowing/lighting)
4223         Mod_MakeSortedSurfaces(loadmodel);
4224
4225         Con_DPrintf("Stats for q1bsp model \"%s\": %i faces, %i nodes, %i leafs, %i visleafs, %i visleafportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
4226 }
4227
4228 int Mod_Q2BSP_SuperContentsFromNativeContents(int nativecontents)
4229 {
4230         int supercontents = 0;
4231         if (nativecontents & CONTENTSQ2_SOLID)
4232                 supercontents |= SUPERCONTENTS_SOLID;
4233         if (nativecontents & CONTENTSQ2_WATER)
4234                 supercontents |= SUPERCONTENTS_WATER;
4235         if (nativecontents & CONTENTSQ2_SLIME)
4236                 supercontents |= SUPERCONTENTS_SLIME;
4237         if (nativecontents & CONTENTSQ2_LAVA)
4238                 supercontents |= SUPERCONTENTS_LAVA;
4239         if (nativecontents & CONTENTSQ2_MONSTER)
4240                 supercontents |= SUPERCONTENTS_BODY;
4241         if (nativecontents & CONTENTSQ2_DEADMONSTER)
4242                 supercontents |= SUPERCONTENTS_CORPSE;
4243         if (nativecontents & CONTENTSQ2_PLAYERCLIP)
4244                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
4245         if (nativecontents & CONTENTSQ2_MONSTERCLIP)
4246                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
4247         if (!(nativecontents & CONTENTSQ2_TRANSLUCENT))
4248                 supercontents |= SUPERCONTENTS_OPAQUE;
4249         return supercontents;
4250 }
4251
4252 int Mod_Q2BSP_NativeContentsFromSuperContents(int supercontents)
4253 {
4254         int nativecontents = 0;
4255         if (supercontents & SUPERCONTENTS_SOLID)
4256                 nativecontents |= CONTENTSQ2_SOLID;
4257         if (supercontents & SUPERCONTENTS_WATER)
4258                 nativecontents |= CONTENTSQ2_WATER;
4259         if (supercontents & SUPERCONTENTS_SLIME)
4260                 nativecontents |= CONTENTSQ2_SLIME;
4261         if (supercontents & SUPERCONTENTS_LAVA)
4262                 nativecontents |= CONTENTSQ2_LAVA;
4263         if (supercontents & SUPERCONTENTS_BODY)
4264                 nativecontents |= CONTENTSQ2_MONSTER;
4265         if (supercontents & SUPERCONTENTS_CORPSE)
4266                 nativecontents |= CONTENTSQ2_DEADMONSTER;
4267         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
4268                 nativecontents |= CONTENTSQ2_PLAYERCLIP;
4269         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
4270                 nativecontents |= CONTENTSQ2_MONSTERCLIP;
4271         if (!(supercontents & SUPERCONTENTS_OPAQUE))
4272                 nativecontents |= CONTENTSQ2_TRANSLUCENT;
4273         return nativecontents;
4274 }
4275
4276 static void Mod_Q2BSP_LoadVisibility(sizebuf_t *sb)
4277 {
4278         int i, count;
4279         loadmodel->brushq1.num_compressedpvs = 0;
4280         loadmodel->brushq1.data_compressedpvs = NULL;
4281         loadmodel->brush.num_pvsclusters = 0;
4282         loadmodel->brush.num_pvsclusterbytes = 0;
4283         loadmodel->brush.data_pvsclusters = NULL;
4284
4285         if (!sb->cursize)
4286                 return;
4287
4288         count = MSG_ReadLittleLong(sb);
4289         loadmodel->brush.num_pvsclusters = count;
4290         loadmodel->brush.num_pvsclusterbytes = (count+7)>>3;
4291         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*loadmodel->brush.num_pvsclusterbytes);
4292         for (i = 0;i < count;i++)
4293         {
4294                 int pvsofs = MSG_ReadLittleLong(sb);
4295                 /*int phsofs = */MSG_ReadLittleLong(sb);
4296                 // decompress the vis data for this cluster
4297                 // (note this accesses the underlying data store of sb, which is kind of evil)
4298                 Mod_BSP_DecompressVis(sb->data + pvsofs, sb->data + sb->cursize, loadmodel->brush.data_pvsclusters + i * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (i+1) * loadmodel->brush.num_pvsclusterbytes);
4299         }
4300         // hush the loading error check later - we had to do random access on this lump, so we didn't read to the end
4301         sb->readcount = sb->cursize;
4302 }
4303
4304 static void Mod_Q2BSP_LoadNodes(sizebuf_t *sb)
4305 {
4306         int                     i, j, count, p, child[2];
4307         mnode_t         *out;
4308         int structsize = 28;
4309
4310         if (sb->cursize % structsize)
4311                 Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
4312         count = sb->cursize / structsize;
4313         if (count == 0)
4314                 Host_Error("Mod_Q2BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
4315         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4316
4317         loadmodel->brush.data_nodes = out;
4318         loadmodel->brush.num_nodes = count;
4319
4320         for ( i=0 ; i<count ; i++, out++)
4321         {
4322                 p = MSG_ReadLittleLong(sb);
4323                 out->plane = loadmodel->brush.data_planes + p;
4324                 child[0] = MSG_ReadLittleLong(sb);
4325                 child[1] = MSG_ReadLittleLong(sb);
4326                 out->mins[0] = MSG_ReadLittleShort(sb);
4327                 out->mins[1] = MSG_ReadLittleShort(sb);
4328                 out->mins[2] = MSG_ReadLittleShort(sb);
4329                 out->maxs[0] = MSG_ReadLittleShort(sb);
4330                 out->maxs[1] = MSG_ReadLittleShort(sb);
4331                 out->maxs[2] = MSG_ReadLittleShort(sb);
4332                 out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
4333                 out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
4334                 if (out->firstsurface + out->numsurfaces > (unsigned int)loadmodel->num_surfaces)
4335                 {
4336                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid surface index range %i+%i (file has only %i surfaces)\n", out->firstsurface, out->numsurfaces, loadmodel->num_surfaces);
4337                         out->firstsurface = 0;
4338                         out->numsurfaces = 0;
4339                 }
4340                 for (j=0 ; j<2 ; j++)
4341                 {
4342                         p = child[j];
4343                         if (p >= 0)
4344                         {
4345                                 if (p < loadmodel->brush.num_nodes)
4346                                         out->children[j] = loadmodel->brush.data_nodes + p;
4347                                 else
4348                                 {
4349                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
4350                                         // map it to the solid leaf
4351                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4352                                 }
4353                         }
4354                         else
4355                         {
4356                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
4357                                 p = -(p+1);
4358                                 if (p < loadmodel->brush.num_leafs)
4359                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
4360                                 else
4361                                 {
4362                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
4363                                         // map it to the solid leaf
4364                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4365                                 }
4366                         }
4367                 }
4368         }
4369
4370         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);        // sets nodes and leafs
4371 }
4372
4373 static void Mod_Q2BSP_LoadTexinfo(sizebuf_t *sb)
4374 {
4375         mtexinfo_t *out;
4376         int i, l, count;
4377         int structsize = 76;
4378         int maxtextures = 1024; // hardcoded limit of quake2 engine, so we may as well use it as an upper bound
4379         char filename[MAX_QPATH];
4380
4381         if (sb->cursize % structsize)
4382                 Host_Error("Mod_Q2BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
4383         count = sb->cursize / structsize;
4384         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4385         loadmodel->brushq1.texinfo = out;
4386         loadmodel->brushq1.numtexinfo = count;
4387         loadmodel->num_texturesperskin = 0;
4388         loadmodel->data_textures = (texture_t*)Mem_Alloc(loadmodel->mempool, maxtextures * sizeof(texture_t));
4389
4390         for (i = 0;i < count;i++, out++)
4391         {
4392                 int j, k;
4393                 for (k = 0;k < 2;k++)
4394                         for (j = 0;j < 4;j++)
4395                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
4396
4397                 out->q2flags = MSG_ReadLittleLong(sb);
4398                 out->q2value = MSG_ReadLittleLong(sb);
4399                 MSG_ReadBytes(sb, 32, (unsigned char*)out->q2texture);
4400                 out->q2texture[31] = 0; // make absolutely sure it is terminated
4401                 out->q2nexttexinfo = MSG_ReadLittleLong(sb);
4402
4403                 // find an existing match for the texture if possible
4404                 dpsnprintf(filename, sizeof(filename), "textures/%s.wal", out->q2texture);
4405                 for (j = 0;j < loadmodel->num_texturesperskin;j++)
4406                         if (!strcmp(filename, loadmodel->data_textures[j].name)
4407                          && out->q2flags == loadmodel->data_textures[j].q2flags
4408                          && out->q2value == loadmodel->data_textures[j].q2value)
4409                                 break;
4410                 // if we don't find the texture, store the new texture
4411                 if (j == loadmodel->num_texturesperskin)
4412                 {
4413                         if (loadmodel->num_texturesperskin < maxtextures)
4414                         {
4415                                 texture_t *tx = loadmodel->data_textures + j;
4416                                 int q2flags = out->q2flags;
4417                                 unsigned char *walfile = NULL;
4418                                 fs_offset_t walfilesize = 0;
4419                                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, tx, filename, true, true, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
4420                                 // now read the .wal file to get metadata (even if a .tga was overriding it, we still need the wal data)
4421                                 walfile = FS_LoadFile(filename, tempmempool, true, &walfilesize);
4422                                 if (walfile)
4423                                 {
4424                                         int w, h;
4425                                         LoadWAL_GetMetadata(walfile, (int)walfilesize, &w, &h, NULL, NULL, &tx->q2contents, NULL);
4426                                         tx->width = w;
4427                                         tx->height = h;
4428                                         Mem_Free(walfile);
4429                                 }
4430                                 else
4431                                 {
4432                                         tx->width = 16;
4433                                         tx->height = 16;
4434                                 }
4435                                 tx->q2flags = out->q2flags;
4436                                 tx->q2value = out->q2value;
4437                                 // also modify the texture to have the correct contents and such based on flags
4438                                 // note that we create multiple texture_t structures if q2flags differs
4439                                 if (q2flags & Q2SURF_LIGHT)
4440                                 {
4441                                         // doesn't mean anything to us
4442                                 }
4443                                 if (q2flags & Q2SURF_SLICK)
4444                                 {
4445                                         // would be nice to support...
4446                                 }
4447                                 if (q2flags & Q2SURF_SKY)
4448                                 {
4449                                         // sky is a rather specific thing
4450                                         q2flags &= ~Q2SURF_NODRAW; // quake2 had a slightly different meaning than we have in mind here...
4451                                         tx->basematerialflags = MATERIALFLAG_SKY;
4452                                         tx->supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE;
4453                                         tx->surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
4454                                 }
4455                                 if (q2flags & Q2SURF_WARP)
4456                                 {
4457                                         // we use a scroll instead of a warp
4458                                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_FULLBRIGHT;
4459                                         // if it's also transparent, we can enable the WATERSHADER
4460                                         // but we do not set the WATERALPHA flag because we don't
4461                                         // want to honor r_wateralpha in q2bsp
4462                                         // (it would go against the artistic intent)
4463                                         if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66))
4464                                                 tx->basematerialflags |= MATERIALFLAG_WATERSHADER;
4465                                 }
4466                                 if (q2flags & Q2SURF_TRANS33)
4467                                 {
4468                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4469                                         tx->basealpha = 1.0f / 3.0f;
4470                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4471                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4472                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4473                                 }
4474                                 if (q2flags & Q2SURF_TRANS66)
4475                                 {
4476                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4477                                         tx->basealpha = 2.0f / 3.0f;
4478                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4479                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4480                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4481                                 }
4482                                 if ((q2flags & Q2SURF_FLOWING) && tx->materialshaderpass != NULL)
4483                                 {
4484                                         tx->materialshaderpass->tcmods[0].tcmod = Q3TCMOD_SCROLL;
4485                                         if (q2flags & Q2SURF_WARP)
4486                                                 tx->materialshaderpass->tcmods[0].parms[0] = -0.5f;
4487                                         else
4488                                                 tx->materialshaderpass->tcmods[0].parms[0] = -1.6f;
4489                                         tx->materialshaderpass->tcmods[0].parms[1] = 0.0f;
4490                                 }
4491                                 if (q2flags & Q2SURF_ALPHATEST)
4492                                 {
4493                                         // KMQUAKE2 and other modded engines added this flag for lit alpha tested surfaces
4494                                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
4495                                 }
4496                                 else if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66 | Q2SURF_WARP))
4497                                 {
4498                                         if (!mod_q2bsp_littransparentsurfaces.integer)
4499                                                 tx->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
4500                                 }
4501                                 if (q2flags & Q2SURF_NODRAW)
4502                                 {
4503                                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
4504                                 }
4505                                 if (tx->q2contents & (Q2CONTENTS_TRANSLUCENT | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_PLAYERCLIP))
4506                                         tx->q2contents |= Q2CONTENTS_DETAIL;
4507                                 if (!(tx->q2contents & (Q2CONTENTS_SOLID | Q2CONTENTS_WINDOW | Q2CONTENTS_AUX | Q2CONTENTS_LAVA | Q2CONTENTS_SLIME | Q2CONTENTS_WATER | Q2CONTENTS_MIST | Q2CONTENTS_PLAYERCLIP | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_MIST)))
4508                                         tx->q2contents |= Q2CONTENTS_SOLID;
4509                                 if (tx->q2flags & (Q2SURF_HINT | Q2SURF_SKIP))
4510                                         tx->q2contents = 0;
4511                                 tx->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(tx->q2contents);
4512                                 // set the current values to the base values
4513                                 tx->currentframe = tx;
4514                                 tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
4515                                 tx->currentmaterialflags = tx->basematerialflags;
4516                                 loadmodel->num_texturesperskin++;
4517                                 loadmodel->num_textures = loadmodel->num_texturesperskin;
4518                         }
4519                         else
4520                         {
4521                                 Con_Printf("Mod_Q2BSP_LoadTexinfo: max textures reached (%i)\n", maxtextures);
4522                                 j = 0; // use first texture and give up
4523                         }
4524                 }
4525                 // store the index we found for this texture
4526                 out->textureindex = j;
4527         }
4528
4529         // realloc the textures array now that we know how many we actually need
4530         loadmodel->data_textures = (texture_t*)Mem_Realloc(loadmodel->mempool, loadmodel->data_textures, loadmodel->num_texturesperskin * sizeof(texture_t));
4531
4532         // now assemble the texture chains
4533         // if we encounter the textures out of order, the later ones won't mark the earlier ones in a sequence, so the earlier
4534         for (i = 0, out = loadmodel->brushq1.texinfo;i < count;i++, out++)
4535         {
4536                 int j, k;
4537                 texture_t *t = loadmodel->data_textures + out->textureindex;
4538                 t->currentframe = t; // fix the reallocated pointer
4539
4540                 // if this is not animated, skip it
4541                 // if this is already processed, skip it (part of an existing sequence)
4542                 if (out->q2nexttexinfo == 0 || t->animated)
4543                         continue;
4544
4545                 // store the array of frames to use
4546                 t->animated = 2; // q2bsp animation
4547                 t->anim_total[0] = 0;
4548                 t->anim_total[1] = 0;
4549                 // gather up to 10 frames (we don't support more)
4550                 for (j = i;j >= 0 && t->anim_total[0] < (int)(sizeof(t->anim_frames[0])/sizeof(t->anim_frames[0][0]));j = loadmodel->brushq1.texinfo[j].q2nexttexinfo)
4551                 {
4552                         // detect looping and stop there
4553                         if (t->anim_total[0] && loadmodel->brushq1.texinfo[j].textureindex == out->textureindex)
4554                                 break;
4555                         t->anim_frames[0][t->anim_total[0]++] = &loadmodel->data_textures[loadmodel->brushq1.texinfo[j].textureindex];
4556                 }
4557                 // we could look for the +a sequence here if this is the +0 sequence,
4558                 // but it seems that quake2 did not implement that (even though the
4559                 // files exist in the baseq2 content)
4560
4561                 // write the frame sequence to all the textures involved (just like
4562                 // in the q1bsp loader)
4563                 //
4564                 // note that this can overwrite the rest of the sequence - so if the
4565                 // start of a sequence is found later than the other parts of the
4566                 // sequence, it will go back and rewrite them correctly.
4567                 for (k = 0;k < t->anim_total[0];k++)
4568                 {
4569                         texture_t *txk = t->anim_frames[0][k];
4570                         txk->animated = t->animated;
4571                         txk->anim_total[0] = t->anim_total[0];
4572                         for (l = 0;l < t->anim_total[0];l++)
4573                                 txk->anim_frames[0][l] = t->anim_frames[0][l];
4574                 }
4575         }
4576 }
4577
4578 static void Mod_Q2BSP_LoadLighting(sizebuf_t *sb)
4579 {
4580         // LadyHavoc: this fits exactly the same format that we use in .lit files
4581         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
4582         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.lightdata);
4583 }
4584
4585 static void Mod_Q2BSP_LoadLeafs(sizebuf_t *sb)
4586 {
4587         mleaf_t *out;
4588         int i, j, count, firstmarksurface, nummarksurfaces, firstmarkbrush, nummarkbrushes;
4589         int structsize = 28;
4590
4591         if (sb->cursize % structsize)
4592                 Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
4593         count = sb->cursize / structsize;
4594         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4595
4596         loadmodel->brush.data_leafs = out;
4597         loadmodel->brush.num_leafs = count;
4598
4599         // FIXME: this function could really benefit from some error checking
4600         for ( i=0 ; i<count ; i++, out++)
4601         {
4602                 out->contents = MSG_ReadLittleLong(sb);
4603                 out->clusterindex = MSG_ReadLittleShort(sb);
4604                 out->areaindex = MSG_ReadLittleShort(sb);
4605                 out->mins[0] = MSG_ReadLittleShort(sb);
4606                 out->mins[1] = MSG_ReadLittleShort(sb);
4607                 out->mins[2] = MSG_ReadLittleShort(sb);
4608                 out->maxs[0] = MSG_ReadLittleShort(sb);
4609                 out->maxs[1] = MSG_ReadLittleShort(sb);
4610                 out->maxs[2] = MSG_ReadLittleShort(sb);
4611
4612                 firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
4613                 nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
4614                 firstmarkbrush = (unsigned short)MSG_ReadLittleShort(sb);
4615                 nummarkbrushes  = (unsigned short)MSG_ReadLittleShort(sb);
4616
4617                 for (j = 0;j < 4;j++)
4618                         out->ambient_sound_level[j] = 0;
4619
4620                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
4621                 {
4622                         Con_Print("Mod_Q2BSP_LoadLeafs: invalid clusterindex\n");
4623                         out->clusterindex = -1;
4624                 }
4625
4626                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
4627                 {
4628                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
4629                         out->numleafsurfaces = nummarksurfaces;
4630                 }
4631                 else
4632                 {
4633                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
4634                         out->firstleafsurface = NULL;
4635                         out->numleafsurfaces = 0;
4636                 }
4637
4638                 if (firstmarkbrush >= 0 && firstmarkbrush + nummarkbrushes <= loadmodel->brush.num_leafbrushes)
4639                 {
4640                         out->firstleafbrush = loadmodel->brush.data_leafbrushes + firstmarkbrush;
4641                         out->numleafbrushes = nummarkbrushes;
4642                 }
4643                 else
4644                 {
4645                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafbrush range %i:%i outside range %i:%i\n", firstmarkbrush, firstmarkbrush+nummarkbrushes, 0, loadmodel->brush.num_leafbrushes);
4646                         out->firstleafbrush = NULL;
4647                         out->numleafbrushes = 0;
4648                 }
4649         }
4650 }
4651
4652 static void Mod_Q2BSP_LoadLeafBrushes(sizebuf_t *sb)
4653 {
4654         int i, j;
4655         int structsize = 2;
4656
4657         if (sb->cursize % structsize)
4658                 Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
4659         loadmodel->brush.num_leafbrushes = sb->cursize / structsize;
4660         loadmodel->brush.data_leafbrushes = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafbrushes * sizeof(int));
4661
4662         for (i = 0;i < loadmodel->brush.num_leafbrushes;i++)
4663         {
4664                 j = (unsigned short) MSG_ReadLittleShort(sb);
4665                 if (j >= loadmodel->brush.num_brushes)
4666                         Host_Error("Mod_Q1BSP_LoadLeafBrushes: bad brush number");
4667                 loadmodel->brush.data_leafbrushes[i] = j;
4668         }
4669 }
4670
4671 static void Mod_Q2BSP_LoadBrushSides(sizebuf_t *sb)
4672 {
4673         q3mbrushside_t *out;
4674         int i, n, count;
4675         int structsize = 4;
4676
4677         if (sb->cursize % structsize)
4678                 Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
4679         count = sb->cursize / structsize;
4680         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4681
4682         loadmodel->brush.data_brushsides = out;
4683         loadmodel->brush.num_brushsides = count;
4684
4685         for (i = 0;i < count;i++, out++)
4686         {
4687                 n = (unsigned short)MSG_ReadLittleShort(sb);
4688                 if (n < 0 || n >= loadmodel->brush.num_planes)
4689                         Host_Error("Mod_Q2BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
4690                 out->plane = loadmodel->brush.data_planes + n;
4691                 n = MSG_ReadLittleShort(sb);
4692                 if (n >= 0)
4693                 {
4694                         if (n >= loadmodel->brushq1.numtexinfo)
4695                                 Host_Error("Mod_Q2BSP_LoadBrushSides: invalid texinfo index %i (%i texinfos)", n, loadmodel->brushq1.numtexinfo);
4696                         out->texture = loadmodel->data_textures + loadmodel->brushq1.texinfo[n].textureindex;
4697                 }
4698                 else
4699                 {
4700                         //Con_Printf("Mod_Q2BSP_LoadBrushSides: brushside %i has texinfo index %i < 0, changing to generic texture!\n", i, n);
4701                         out->texture = &mod_q1bsp_texture_solid;
4702                 }
4703         }
4704 }
4705
4706 static void Mod_Q2BSP_LoadBrushes(sizebuf_t *sb)
4707 {
4708         q3mbrush_t *out;
4709         int i, j, firstside, numsides, contents, count, maxplanes, q3surfaceflags, supercontents;
4710         colplanef_t *planes;
4711         int structsize = 12;
4712         qbool brushmissingtextures;
4713         int numbrushesmissingtextures = 0;
4714         int numcreatedtextures = 0;
4715
4716         if (sb->cursize % structsize)
4717                 Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
4718         count = sb->cursize / structsize;
4719         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4720
4721         loadmodel->brush.data_brushes = out;
4722         loadmodel->brush.num_brushes = count;
4723
4724         maxplanes = 0;
4725         planes = NULL;
4726
4727         for (i = 0; i < count; i++, out++)
4728         {
4729                 firstside = MSG_ReadLittleLong(sb);
4730                 numsides = MSG_ReadLittleLong(sb);
4731                 contents = MSG_ReadLittleLong(sb);
4732                 if (firstside < 0 || firstside + numsides > loadmodel->brush.num_brushsides)
4733                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", firstside, firstside + numsides, loadmodel->brush.num_brushsides);
4734
4735                 out->firstbrushside = loadmodel->brush.data_brushsides + firstside;
4736                 out->numbrushsides = numsides;
4737                 // convert the contents to our values
4738                 supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(contents);
4739
4740                 // problem: q2bsp brushes have contents but not a texture
4741                 // problem: q2bsp brushsides *may* have a texture or may not
4742                 // problem: all brushsides and brushes must have a texture for trace_hittexture functionality to work, and the collision code is engineered around this assumption
4743                 // solution: nasty hacks
4744                 brushmissingtextures = false;
4745                 out->texture = NULL;
4746                 for (j = 0; j < out->numbrushsides; j++)
4747                 {
4748                         if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4749                                 brushmissingtextures = true;
4750                         else
4751                         {
4752                                 // if we can find a matching texture on a brush side we can use it instead of creating one
4753                                 if (out->firstbrushside[j].texture->supercontents == supercontents)
4754                                         out->texture = out->firstbrushside[j].texture;
4755                         }
4756                 }
4757                 if (brushmissingtextures || out->texture == NULL)
4758                 {
4759                         numbrushesmissingtextures++;
4760                         // if we didn't find any appropriate texture (matching contents), we'll have to create one
4761                         // we could search earlier ones for a matching one but that can be slow
4762                         if (out->texture == NULL)
4763                         {
4764                                 texture_t *validtexture;
4765                                 validtexture = (texture_t *)Mem_Alloc(loadmodel->mempool, sizeof(texture_t));
4766                                 dpsnprintf(validtexture->name, sizeof(validtexture->name), "brushcollision%i", numcreatedtextures);
4767                                 validtexture->surfaceflags = 0;
4768                                 validtexture->supercontents = supercontents;
4769                                 numcreatedtextures++;
4770                                 out->texture = validtexture;
4771                         }
4772                         // out->texture now contains a texture with appropriate contents, copy onto any missing sides
4773                         for (j = 0; j < out->numbrushsides; j++)
4774                                 if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4775                                         out->firstbrushside[j].texture = out->texture;
4776                 }
4777
4778                 // make a colbrush from the brush
4779                 q3surfaceflags = 0;
4780                 // make a list of mplane_t structs to construct a colbrush from
4781                 if (maxplanes < out->numbrushsides)
4782                 {
4783                         maxplanes = out->numbrushsides;
4784                         if (planes)
4785                                 Mem_Free(planes);
4786                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
4787                 }
4788                 for (j = 0;j < out->numbrushsides;j++)
4789                 {
4790                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
4791                         planes[j].dist = out->firstbrushside[j].plane->dist;
4792                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
4793                         planes[j].texture = out->firstbrushside[j].texture;
4794                         q3surfaceflags |= planes[j].q3surfaceflags;
4795                 }
4796                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
4797
4798                 // this whole loop can take a while (e.g. on redstarrepublic4)
4799                 CL_KeepaliveMessage(false);
4800         }
4801         if (planes)
4802                 Mem_Free(planes);
4803         if (numcreatedtextures)
4804                 Con_DPrintf("Mod_Q2BSP_LoadBrushes: %i brushes own sides that lack textures or have differing contents from the brush, %i textures have been created to describe these contents.\n", numbrushesmissingtextures, numcreatedtextures);
4805 }
4806
4807 static void Mod_Q2BSP_LoadPOP(sizebuf_t *sb)
4808 {
4809         // this is probably a "proof of purchase" lump of some sort, it seems to be 0 size in most bsp files (but not q2dm1.bsp for instance)
4810         sb->readcount = sb->cursize;
4811 }
4812
4813 static void Mod_Q2BSP_LoadAreas(sizebuf_t *sb)
4814 {
4815         // we currently don't use areas, they represent closable doors as vis blockers
4816         sb->readcount = sb->cursize;
4817 }
4818
4819 static void Mod_Q2BSP_LoadAreaPortals(sizebuf_t *sb)
4820 {
4821         // we currently don't use areas, they represent closable doors as vis blockers
4822         sb->readcount = sb->cursize;
4823 }
4824
4825 static void Mod_Q2BSP_FindSubmodelBrushRange_r(model_t *mod, mnode_t *node, int *first, int *last)
4826 {
4827         int i;
4828         mleaf_t *leaf;
4829         while (node->plane)
4830         {
4831                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, node->children[0], first, last);
4832                 node = node->children[1];
4833         }
4834         leaf = (mleaf_t*)node;
4835         for (i = 0;i < leaf->numleafbrushes;i++)
4836         {
4837                 int brushnum = leaf->firstleafbrush[i];
4838                 if (*first > brushnum)
4839                         *first = brushnum;
4840                 if (*last < brushnum)
4841                         *last = brushnum;
4842         }
4843 }
4844
4845 static void Mod_Q2BSP_Load(model_t *mod, void *buffer, void *bufferend)
4846 {
4847         int i, j, k;
4848         sizebuf_t lumpsb[Q2HEADER_LUMPS];
4849         mmodel_t *bm;
4850         float dist, modelyawradius, modelradius;
4851         msurface_t *surface;
4852         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
4853         model_brush_lightstyleinfo_t styleinfo[256];
4854         int *datapointer;
4855         model_brush_lightstyleinfo_t *lsidatapointer;
4856         sizebuf_t sb;
4857
4858         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
4859
4860         mod->type = mod_brushq2;
4861
4862         mod->brush.ishlbsp = false;
4863         mod->brush.isbsp2rmqe = false;
4864         mod->brush.isbsp2 = false;
4865         mod->brush.isq2bsp = true; // q1bsp loaders mostly work but we need a few tweaks
4866         mod->brush.isq3bsp = false;
4867         mod->brush.skymasking = true;
4868         mod->modeldatatypestring = "Q2BSP";
4869
4870         i = MSG_ReadLittleLong(&sb);
4871         if (i != Q2BSPMAGIC)
4872                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4873
4874         i = MSG_ReadLittleLong(&sb);
4875         if (i != Q2BSPVERSION)
4876                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4877
4878 // read lumps
4879         for (i = 0; i < Q2HEADER_LUMPS; i++)
4880         {
4881                 int offset = MSG_ReadLittleLong(&sb);
4882                 int size = MSG_ReadLittleLong(&sb);
4883                 if (offset < 0 || offset + size > sb.cursize)
4884                         Host_Error("Mod_Q2BSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
4885                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
4886         }
4887
4888         mod->soundfromcenter = true;
4889         mod->TracePoint = Mod_CollisionBIH_TracePoint;
4890         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4891         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4892         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4893         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
4894         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
4895         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
4896         mod->brush.SuperContentsFromNativeContents = Mod_Q2BSP_SuperContentsFromNativeContents;
4897         mod->brush.NativeContentsFromSuperContents = Mod_Q2BSP_NativeContentsFromSuperContents;
4898         mod->brush.GetPVS = Mod_BSP_GetPVS;
4899         mod->brush.FatPVS = Mod_BSP_FatPVS;
4900         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
4901         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
4902         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
4903         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
4904         mod->brush.LightPoint = Mod_BSP_LightPoint;
4905         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
4906         mod->brush.AmbientSoundLevelsForPoint = NULL;
4907         mod->brush.RoundUpToHullSize = NULL;
4908         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
4909         mod->Draw = R_Mod_Draw;
4910         mod->DrawDepth = R_Mod_DrawDepth;
4911         mod->DrawDebug = R_Mod_DrawDebug;
4912         mod->DrawPrepass = R_Mod_DrawPrepass;
4913         mod->GetLightInfo = R_Mod_GetLightInfo;
4914         mod->CompileShadowMap = R_Mod_CompileShadowMap;
4915         mod->DrawShadowMap = R_Mod_DrawShadowMap;
4916         mod->DrawLight = R_Mod_DrawLight;
4917
4918 // load into heap
4919
4920         mod->brush.qw_md4sum = 0;
4921         mod->brush.qw_md4sum2 = 0;
4922         for (i = 0;i < Q2HEADER_LUMPS;i++)
4923         {
4924                 int temp;
4925                 if (i == Q2LUMP_ENTITIES)
4926                         continue;
4927                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
4928                 mod->brush.qw_md4sum ^= LittleLong(temp);
4929                 if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
4930                         continue;
4931                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
4932         }
4933
4934         // many of these functions are identical to Q1 loaders, so we use those where possible
4935         Mod_Q1BSP_LoadEntities(&lumpsb[Q2LUMP_ENTITIES]);
4936         Mod_Q1BSP_LoadVertexes(&lumpsb[Q2LUMP_VERTEXES]);
4937         Mod_Q1BSP_LoadEdges(&lumpsb[Q2LUMP_EDGES]);
4938         Mod_Q1BSP_LoadSurfedges(&lumpsb[Q2LUMP_SURFEDGES]);
4939         Mod_Q2BSP_LoadLighting(&lumpsb[Q2LUMP_LIGHTING]);
4940         Mod_Q1BSP_LoadPlanes(&lumpsb[Q2LUMP_PLANES]);
4941         Mod_Q2BSP_LoadTexinfo(&lumpsb[Q2LUMP_TEXINFO]);
4942         Mod_Q2BSP_LoadBrushSides(&lumpsb[Q2LUMP_BRUSHSIDES]);
4943         Mod_Q2BSP_LoadBrushes(&lumpsb[Q2LUMP_BRUSHES]);
4944         Mod_Q1BSP_LoadFaces(&lumpsb[Q2LUMP_FACES]);
4945         Mod_Q1BSP_LoadLeaffaces(&lumpsb[Q2LUMP_LEAFFACES]);
4946         Mod_Q2BSP_LoadLeafBrushes(&lumpsb[Q2LUMP_LEAFBRUSHES]);
4947         Mod_Q2BSP_LoadVisibility(&lumpsb[Q2LUMP_VISIBILITY]);
4948         Mod_Q2BSP_LoadPOP(&lumpsb[Q2LUMP_POP]);
4949         Mod_Q2BSP_LoadAreas(&lumpsb[Q2LUMP_AREAS]);
4950         Mod_Q2BSP_LoadAreaPortals(&lumpsb[Q2LUMP_AREAPORTALS]);
4951         Mod_Q2BSP_LoadLeafs(&lumpsb[Q2LUMP_LEAFS]);
4952         Mod_Q2BSP_LoadNodes(&lumpsb[Q2LUMP_NODES]);
4953         Mod_BSP_LoadSubmodels(&lumpsb[Q2LUMP_MODELS], NULL);
4954
4955         for (i = 0; i < Q2HEADER_LUMPS; i++)
4956                 if (lumpsb[i].readcount != lumpsb[i].cursize)
4957                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4958
4959         // we don't actually set MATERIALFLAG_WATERALPHA on anything, so this
4960         // doesn't enable the cvar, just indicates that transparent water is OK
4961         loadmodel->brush.supportwateralpha = true;
4962
4963         // we don't need the compressed pvs data anymore
4964         if (mod->brushq1.data_compressedpvs)
4965                 Mem_Free(mod->brushq1.data_compressedpvs);
4966         mod->brushq1.data_compressedpvs = NULL;
4967         mod->brushq1.num_compressedpvs = 0;
4968
4969         // the MakePortals code works fine on the q2bsp data as well
4970         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
4971                 Mod_BSP_MakePortals();
4972
4973         mod->numframes = 0;             // q2bsp animations are kind of special, frame is unbounded...
4974         mod->numskins = 1;
4975
4976         if (loadmodel->brush.numsubmodels)
4977                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4978
4979         totalstylesurfaces = 0;
4980         totalstyles = 0;
4981         for (i = 0;i < mod->brush.numsubmodels;i++)
4982         {
4983                 memset(stylecounts, 0, sizeof(stylecounts));
4984                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4985                 {
4986                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4987                         for (j = 0;j < MAXLIGHTMAPS;j++)
4988                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4989                 }
4990                 for (k = 0;k < 255;k++)
4991                 {
4992                         totalstyles++;
4993                         if (stylecounts[k])
4994                                 totalstylesurfaces += stylecounts[k];
4995                 }
4996         }
4997         // bones_was_here: using a separate allocation for model_brush_lightstyleinfo_t
4998         // because on a 64-bit machine it no longer has the same alignment requirement as int.
4999         lsidatapointer = Mem_AllocType(mod->mempool, model_brush_lightstyleinfo_t, totalstyles * sizeof(model_brush_lightstyleinfo_t));
5000         datapointer = Mem_AllocType(mod->mempool, int, mod->num_surfaces * sizeof(int) + totalstylesurfaces * sizeof(int));
5001         mod->modelsurfaces_sorted = datapointer; datapointer += mod->num_surfaces;
5002         // set up the world model, then on each submodel copy from the world model
5003         // and set up the submodel with the respective model info.
5004         mod = loadmodel;
5005         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
5006         {
5007                 mnode_t *rootnode = NULL;
5008                 int firstbrush = loadmodel->brush.num_brushes, lastbrush = 0;
5009                 if (i > 0)
5010                 {
5011                         char name[10];
5012                         // duplicate the basic information
5013                         dpsnprintf(name, sizeof(name), "*%i", i);
5014                         mod = Mod_FindName(name, loadmodel->name);
5015                         // copy the base model to this one
5016                         *mod = *loadmodel;
5017                         // rename the clone back to its proper name
5018                         dp_strlcpy(mod->name, name, sizeof(mod->name));
5019                         mod->brush.parentmodel = loadmodel;
5020                         // textures and memory belong to the main model
5021                         mod->texturepool = NULL;
5022                         mod->mempool = NULL;
5023                         mod->brush.GetPVS = NULL;
5024                         mod->brush.FatPVS = NULL;
5025                         mod->brush.BoxTouchingPVS = NULL;
5026                         mod->brush.BoxTouchingLeafPVS = NULL;
5027                         mod->brush.BoxTouchingVisibleLeafs = NULL;
5028                         mod->brush.FindBoxClusters = NULL;
5029                         mod->brush.LightPoint = NULL;
5030                         mod->brush.AmbientSoundLevelsForPoint = NULL;
5031                 }
5032                 mod->brush.submodel = i;
5033                 if (loadmodel->brush.submodels)
5034                         loadmodel->brush.submodels[i] = mod;
5035
5036                 bm = &mod->brushq1.submodels[i];
5037
5038                 // we store the headnode (there's only one in Q2BSP) as if it were the first hull
5039                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
5040
5041                 mod->submodelsurfaces_start = bm->firstface;
5042                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
5043
5044                 // set node/leaf parents for this submodel
5045                 // note: if the root of this submodel is a leaf (headnode[0] < 0) then there is nothing to do...
5046                 // (this happens in base3.bsp)
5047                 if (bm->headnode[0] >= 0)
5048                         rootnode = mod->brush.data_nodes + bm->headnode[0];
5049                 else
5050                         rootnode = (mnode_t*)(mod->brush.data_leafs + -1 - bm->headnode[0]);
5051                 Mod_BSP_LoadNodes_RecursiveSetParent(rootnode, NULL);
5052
5053                 // make the model surface list (used by shadowing/lighting)
5054                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, rootnode, &firstbrush, &lastbrush);
5055                 if (firstbrush <= lastbrush)
5056                 {
5057                         mod->firstmodelbrush = firstbrush;
5058                         mod->nummodelbrushes = lastbrush + 1 - firstbrush;
5059                 }
5060                 else
5061                 {
5062                         mod->firstmodelbrush = 0;
5063                         mod->nummodelbrushes = 0;
5064                 }
5065
5066                 VectorCopy(bm->mins, mod->normalmins);
5067                 VectorCopy(bm->maxs, mod->normalmaxs);
5068                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
5069                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
5070                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
5071                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
5072                 modelradius = modelyawradius + modelradius * modelradius;
5073                 modelyawradius = sqrt(modelyawradius);
5074                 modelradius = sqrt(modelradius);
5075                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
5076                 mod->yawmins[2] = mod->normalmins[2];
5077                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
5078                 mod->yawmaxs[2] = mod->normalmaxs[2];
5079                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
5080                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
5081                 mod->radius = modelradius;
5082                 mod->radius2 = modelradius * modelradius;
5083
5084                 Mod_SetDrawSkyAndWater(mod);
5085
5086                 // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
5087                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
5088                 {
5089                         // build lightstyle update chains
5090                         // (used to rapidly mark lightmapupdateflags on many surfaces
5091                         // when d_lightstylevalue changes)
5092                         memset(stylecounts, 0, sizeof(stylecounts));
5093                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5094                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5095                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
5096                         mod->brushq1.num_lightstyles = 0;
5097                         for (k = 0;k < 255;k++)
5098                         {
5099                                 if (stylecounts[k])
5100                                 {
5101                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
5102                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
5103                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
5104                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = datapointer;datapointer += stylecounts[k];
5105                                         remapstyles[k] = mod->brushq1.num_lightstyles;
5106                                         mod->brushq1.num_lightstyles++;
5107                                 }
5108                         }
5109                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5110                         {
5111                                 surface = mod->data_surfaces + k;
5112                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5113                                 {
5114                                         if (surface->lightmapinfo->styles[j] != 255)
5115                                         {
5116                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
5117                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
5118                                         }
5119                                 }
5120                         }
5121                         mod->brushq1.data_lightstyleinfo = lsidatapointer;lsidatapointer += mod->brushq1.num_lightstyles;
5122                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
5123                 }
5124                 else
5125                 {
5126                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
5127                 }
5128                 //mod->brushq1.num_visleafs = bm->visleafs;
5129
5130                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
5131                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
5132
5133                 // build a Bounding Interval Hierarchy for culling brushes in collision detection
5134                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
5135
5136                 // generate VBOs and other shared data before cloning submodels
5137                 if (i == 0)
5138                         Mod_BuildVBOs();
5139         }
5140         mod = loadmodel;
5141
5142         // make the model surface list (used by shadowing/lighting)
5143         Mod_MakeSortedSurfaces(loadmodel);
5144
5145         Con_DPrintf("Stats for q2bsp model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
5146 }
5147
5148 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents);
5149 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents);
5150
5151 static void Mod_Q3BSP_LoadEntities(lump_t *l)
5152 {
5153         const char *data;
5154         char key[128], value[MAX_INPUTLINE];
5155         float v[3];
5156         loadmodel->brushq3.num_lightgrid_cellsize[0] = 64;
5157         loadmodel->brushq3.num_lightgrid_cellsize[1] = 64;
5158         loadmodel->brushq3.num_lightgrid_cellsize[2] = 128;
5159         if (!l->filelen)
5160                 return;
5161         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
5162         memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
5163         loadmodel->brush.entities[l->filelen] = 0;
5164         data = loadmodel->brush.entities;
5165         // some Q3 maps override the lightgrid_cellsize with a worldspawn key
5166         // VorteX: q3map2 FS-R generates tangentspace deluxemaps for q3bsp and sets 'deluxeMaps' key
5167         loadmodel->brushq3.deluxemapping = false;
5168         if (data && COM_ParseToken_Simple(&data, false, false, true) && com_token[0] == '{')
5169         {
5170                 while (1)
5171                 {
5172                         if (!COM_ParseToken_Simple(&data, false, false, true))
5173                                 break; // error
5174                         if (com_token[0] == '}')
5175                                 break; // end of worldspawn
5176                         if (com_token[0] == '_')
5177                                 dp_strlcpy(key, com_token + 1, sizeof(key));
5178                         else
5179                                 dp_strlcpy(key, com_token, sizeof(key));
5180                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
5181                                 key[strlen(key)-1] = 0;
5182                         if (!COM_ParseToken_Simple(&data, false, false, true))
5183                                 break; // error
5184                         dp_strlcpy(value, com_token, sizeof(value));
5185                         if (!strcasecmp("gridsize", key)) // this one is case insensitive to 100% match q3map2
5186                         {
5187 #if _MSC_VER >= 1400
5188 #define sscanf sscanf_s
5189 #endif
5190 #if 0
5191                                 if (sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) == 3 && v[0] != 0 && v[1] != 0 && v[2] != 0)
5192                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5193 #else
5194                                 VectorSet(v, 64, 64, 128);
5195                                 if(sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) != 3)
5196                                         Con_Printf("Mod_Q3BSP_LoadEntities: funny gridsize \"%s\" in %s, interpreting as \"%f %f %f\" to match q3map2's parsing\n", value, loadmodel->name, v[0], v[1], v[2]);
5197                                 if (v[0] != 0 && v[1] != 0 && v[2] != 0)
5198                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5199 #endif
5200                         }
5201                         else if (!strcmp("deluxeMaps", key))
5202                         {
5203                                 if (!strcmp(com_token, "1"))
5204                                 {
5205                                         loadmodel->brushq3.deluxemapping = true;
5206                                         loadmodel->brushq3.deluxemapping_modelspace = true;
5207                                 }
5208                                 else if (!strcmp(com_token, "2"))
5209                                 {
5210                                         loadmodel->brushq3.deluxemapping = true;
5211                                         loadmodel->brushq3.deluxemapping_modelspace = false;
5212                                 }
5213                         }
5214                 }
5215         }
5216 }
5217
5218 static void Mod_Q3BSP_LoadTextures(lump_t *l)
5219 {
5220         q3dtexture_t *in;
5221         texture_t *out;
5222         int i, count;
5223
5224         in = (q3dtexture_t *)(mod_base + l->fileofs);
5225         if (l->filelen % sizeof(*in))
5226                 Host_Error("Mod_Q3BSP_LoadTextures: funny lump size in %s",loadmodel->name);
5227         count = l->filelen / sizeof(*in);
5228         out = (texture_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5229
5230         loadmodel->data_textures = out;
5231         loadmodel->num_textures = count;
5232         loadmodel->num_texturesperskin = loadmodel->num_textures;
5233
5234         for (i = 0;i < count;i++)
5235         {
5236                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5237                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5238                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, out + i, in[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
5239                 // restore the surfaceflags and supercontents
5240                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5241                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5242         }
5243 }
5244
5245 static void Mod_Q3BSP_LoadPlanes(lump_t *l)
5246 {
5247         q3dplane_t *in;
5248         mplane_t *out;
5249         int i, count;
5250
5251         in = (q3dplane_t *)(mod_base + l->fileofs);
5252         if (l->filelen % sizeof(*in))
5253                 Host_Error("Mod_Q3BSP_LoadPlanes: funny lump size in %s",loadmodel->name);
5254         count = l->filelen / sizeof(*in);
5255         out = (mplane_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5256
5257         loadmodel->brush.data_planes = out;
5258         loadmodel->brush.num_planes = count;
5259
5260         for (i = 0;i < count;i++, in++, out++)
5261         {
5262                 out->normal[0] = LittleFloat(in->normal[0]);
5263                 out->normal[1] = LittleFloat(in->normal[1]);
5264                 out->normal[2] = LittleFloat(in->normal[2]);
5265                 out->dist = LittleFloat(in->dist);
5266                 PlaneClassify(out);
5267         }
5268 }
5269
5270 static void Mod_Q3BSP_LoadBrushSides(lump_t *l)
5271 {
5272         q3dbrushside_t *in;
5273         q3mbrushside_t *out;
5274         int i, n, count;
5275
5276         in = (q3dbrushside_t *)(mod_base + l->fileofs);
5277         if (l->filelen % sizeof(*in))
5278                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5279         count = l->filelen / sizeof(*in);
5280         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5281
5282         loadmodel->brush.data_brushsides = out;
5283         loadmodel->brush.num_brushsides = count;
5284
5285         for (i = 0;i < count;i++, in++, out++)
5286         {
5287                 n = LittleLong(in->planeindex);
5288                 if (n < 0 || n >= loadmodel->brush.num_planes)
5289                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5290                 out->plane = loadmodel->brush.data_planes + n;
5291                 n = LittleLong(in->textureindex);
5292                 if (n < 0 || n >= loadmodel->num_textures)
5293                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5294                 out->texture = loadmodel->data_textures + n;
5295         }
5296 }
5297
5298 static void Mod_Q3BSP_LoadBrushSides_IG(lump_t *l)
5299 {
5300         q3dbrushside_ig_t *in;
5301         q3mbrushside_t *out;
5302         int i, n, count;
5303
5304         in = (q3dbrushside_ig_t *)(mod_base + l->fileofs);
5305         if (l->filelen % sizeof(*in))
5306                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5307         count = l->filelen / sizeof(*in);
5308         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5309
5310         loadmodel->brush.data_brushsides = out;
5311         loadmodel->brush.num_brushsides = count;
5312
5313         for (i = 0;i < count;i++, in++, out++)
5314         {
5315                 n = LittleLong(in->planeindex);
5316                 if (n < 0 || n >= loadmodel->brush.num_planes)
5317                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5318                 out->plane = loadmodel->brush.data_planes + n;
5319                 n = LittleLong(in->textureindex);
5320                 if (n < 0 || n >= loadmodel->num_textures)
5321                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5322                 out->texture = loadmodel->data_textures + n;
5323         }
5324 }
5325
5326 static void Mod_Q3BSP_LoadBrushes(lump_t *l)
5327 {
5328         q3dbrush_t *in;
5329         q3mbrush_t *out;
5330         int i, j, n, c, count, maxplanes, q3surfaceflags;
5331         colplanef_t *planes;
5332
5333         in = (q3dbrush_t *)(mod_base + l->fileofs);
5334         if (l->filelen % sizeof(*in))
5335                 Host_Error("Mod_Q3BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
5336         count = l->filelen / sizeof(*in);
5337         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5338
5339         loadmodel->brush.data_brushes = out;
5340         loadmodel->brush.num_brushes = count;
5341
5342         maxplanes = 0;
5343         planes = NULL;
5344
5345         for (i = 0;i < count;i++, in++, out++)
5346         {
5347                 n = LittleLong(in->firstbrushside);
5348                 c = LittleLong(in->numbrushsides);
5349                 if (n < 0 || n + c > loadmodel->brush.num_brushsides)
5350                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", n, n + c, loadmodel->brush.num_brushsides);
5351                 out->firstbrushside = loadmodel->brush.data_brushsides + n;
5352                 out->numbrushsides = c;
5353                 n = LittleLong(in->textureindex);
5354                 if (n < 0 || n >= loadmodel->num_textures)
5355                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5356                 out->texture = loadmodel->data_textures + n;
5357
5358                 // make a list of mplane_t structs to construct a colbrush from
5359                 if (maxplanes < out->numbrushsides)
5360                 {
5361                         maxplanes = out->numbrushsides;
5362                         if (planes)
5363                                 Mem_Free(planes);
5364                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
5365                 }
5366                 q3surfaceflags = 0;
5367                 for (j = 0;j < out->numbrushsides;j++)
5368                 {
5369                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
5370                         planes[j].dist = out->firstbrushside[j].plane->dist;
5371                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
5372                         planes[j].texture = out->firstbrushside[j].texture;
5373                         q3surfaceflags |= planes[j].q3surfaceflags;
5374                 }
5375                 // make the colbrush from the planes
5376                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
5377
5378                 // this whole loop can take a while (e.g. on redstarrepublic4)
5379                 CL_KeepaliveMessage(false);
5380         }
5381         if (planes)
5382                 Mem_Free(planes);
5383 }
5384
5385 static void Mod_Q3BSP_LoadEffects(lump_t *l)
5386 {
5387         q3deffect_t *in;
5388         q3deffect_t *out;
5389         int i, n, count;
5390
5391         in = (q3deffect_t *)(mod_base + l->fileofs);
5392         if (l->filelen % sizeof(*in))
5393                 Host_Error("Mod_Q3BSP_LoadEffects: funny lump size in %s",loadmodel->name);
5394         count = l->filelen / sizeof(*in);
5395         out = (q3deffect_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5396
5397         loadmodel->brushq3.data_effects = out;
5398         loadmodel->brushq3.num_effects = count;
5399
5400         for (i = 0;i < count;i++, in++, out++)
5401         {
5402                 dp_strlcpy (out->shadername, in->shadername, sizeof (out->shadername));
5403                 n = LittleLong(in->brushindex);
5404                 if (n >= loadmodel->brush.num_brushes)
5405                 {
5406                         Con_Printf("Mod_Q3BSP_LoadEffects: invalid brushindex %i (%i brushes), setting to -1\n", n, loadmodel->brush.num_brushes);
5407                         n = -1;
5408                 }
5409                 out->brushindex = n;
5410                 out->unknown = LittleLong(in->unknown);
5411         }
5412 }
5413
5414 static void Mod_Q3BSP_LoadVertices(lump_t *l)
5415 {
5416         q3dvertex_t *in;
5417         int i, count;
5418
5419         in = (q3dvertex_t *)(mod_base + l->fileofs);
5420         if (l->filelen % sizeof(*in))
5421                 Host_Error("Mod_Q3BSP_LoadVertices: funny lump size in %s",loadmodel->name);
5422         loadmodel->brushq3.num_vertices = count = l->filelen / sizeof(*in);
5423         loadmodel->brushq3.data_vertex3f = (float *)Mem_Alloc(loadmodel->mempool, count * (sizeof(float) * (3 + 3 + 2 + 2 + 4)));
5424         loadmodel->brushq3.data_normal3f = loadmodel->brushq3.data_vertex3f + count * 3;
5425         loadmodel->brushq3.data_texcoordtexture2f = loadmodel->brushq3.data_normal3f + count * 3;
5426         loadmodel->brushq3.data_texcoordlightmap2f = loadmodel->brushq3.data_texcoordtexture2f + count * 2;
5427         loadmodel->brushq3.data_color4f = loadmodel->brushq3.data_texcoordlightmap2f + count * 2;
5428
5429         for (i = 0;i < count;i++, in++)
5430         {
5431                 loadmodel->brushq3.data_vertex3f[i * 3 + 0] = LittleFloat(in->origin3f[0]);
5432                 loadmodel->brushq3.data_vertex3f[i * 3 + 1] = LittleFloat(in->origin3f[1]);
5433                 loadmodel->brushq3.data_vertex3f[i * 3 + 2] = LittleFloat(in->origin3f[2]);
5434                 loadmodel->brushq3.data_normal3f[i * 3 + 0] = LittleFloat(in->normal3f[0]);
5435                 loadmodel->brushq3.data_normal3f[i * 3 + 1] = LittleFloat(in->normal3f[1]);
5436                 loadmodel->brushq3.data_normal3f[i * 3 + 2] = LittleFloat(in->normal3f[2]);
5437                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 0] = LittleFloat(in->texcoord2f[0]);
5438                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 1] = LittleFloat(in->texcoord2f[1]);
5439                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 0] = LittleFloat(in->lightmap2f[0]);
5440                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 1] = LittleFloat(in->lightmap2f[1]);
5441                 // svector/tvector are calculated later in face loading
5442                 if(mod_q3bsp_sRGBlightmaps.integer)
5443                 {
5444                         // if lightmaps are sRGB, vertex colors are sRGB too, so we need to linearize them
5445                         // note: when this is in use, lightmap color 128 is no longer neutral, but "sRGB half power" is
5446                         // working like this may be odd, but matches q3map2 -gamma 2.2
5447                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5448                         {
5449                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5450                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5451                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5452                                 // we fix the brightness consistently via lightmapscale
5453                         }
5454                         else
5455                         {
5456                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_LinearFloatFromsRGB(in->color4ub[0]);
5457                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_LinearFloatFromsRGB(in->color4ub[1]);
5458                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_LinearFloatFromsRGB(in->color4ub[2]);
5459                         }
5460                 }
5461                 else
5462                 {
5463                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5464                         {
5465                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[0]);
5466                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[1]);
5467                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[2]);
5468                         }
5469                         else
5470                         {
5471                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5472                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5473                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5474                         }
5475                 }
5476                 loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
5477                 if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
5478                         loadmodel->lit = true;
5479         }
5480 }
5481
5482 static void Mod_Q3BSP_LoadTriangles(lump_t *l)
5483 {
5484         int *in;
5485         int *out;
5486         int i, count;
5487
5488         in = (int *)(mod_base + l->fileofs);
5489         if (l->filelen % sizeof(int[3]))
5490                 Host_Error("Mod_Q3BSP_LoadTriangles: funny lump size in %s",loadmodel->name);
5491         count = l->filelen / sizeof(*in);
5492
5493         if(!loadmodel->brushq3.num_vertices)
5494         {
5495                 if (count)
5496                         Con_Printf("Mod_Q3BSP_LoadTriangles: %s has triangles but no vertexes, broken compiler, ignoring problem\n", loadmodel->name);
5497                 loadmodel->brushq3.num_triangles = 0;
5498                 return;
5499         }
5500
5501         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5502         loadmodel->brushq3.num_triangles = count / 3;
5503         loadmodel->brushq3.data_element3i = out;
5504
5505         for (i = 0;i < count;i++, in++, out++)
5506         {
5507                 *out = LittleLong(*in);
5508                 if (*out < 0 || *out >= loadmodel->brushq3.num_vertices)
5509                 {
5510                         Con_Printf("Mod_Q3BSP_LoadTriangles: invalid vertexindex %i (%i vertices), setting to 0\n", *out, loadmodel->brushq3.num_vertices);
5511                         *out = 0;
5512                 }
5513         }
5514 }
5515
5516 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
5517 {
5518         q3dlightmap_t *input_pointer;
5519         int i;
5520         int j;
5521         int k;
5522         int count;
5523         int powerx;
5524         int powery;
5525         int powerxy;
5526         int powerdxy;
5527         int endlightmap;
5528         int mergegoal;
5529         int lightmapindex;
5530         int realcount;
5531         int realindex;
5532         int mergedwidth;
5533         int mergedheight;
5534         int mergedcolumns;
5535         int mergedrows;
5536         int mergedrowsxcolumns;
5537         int size;
5538         int bytesperpixel;
5539         int rgbmap[3];
5540         unsigned char *c;
5541         unsigned char *mergedpixels;
5542         unsigned char *mergeddeluxepixels;
5543         unsigned char *mergebuf;
5544         char mapname[MAX_QPATH];
5545         qbool external;
5546         unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
5547         char vabuf[1024];
5548
5549         // defaults for q3bsp
5550         size = 128;
5551         bytesperpixel = 3;
5552         rgbmap[0] = 2;
5553         rgbmap[1] = 1;
5554         rgbmap[2] = 0;
5555         external = false;
5556         loadmodel->brushq3.lightmapsize = 128;
5557
5558         if (cls.state == ca_dedicated)
5559                 return;
5560
5561         if(mod_q3bsp_nolightmaps.integer)
5562         {
5563                 return;
5564         }
5565         else if(l->filelen)
5566         {
5567                 // prefer internal LMs for compatibility (a BSP contains no info on whether external LMs exist)
5568                 if (developer_loading.integer)
5569                         Con_Printf("Using internal lightmaps\n");
5570                 input_pointer = (q3dlightmap_t *)(mod_base + l->fileofs);
5571                 if (l->filelen % sizeof(*input_pointer))
5572                         Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
5573                 count = l->filelen / sizeof(*input_pointer);
5574                 for(i = 0; i < count; ++i)
5575                         inpixels[i] = input_pointer[i].rgb;
5576         }
5577         else
5578         {
5579                 // no internal lightmaps
5580                 // try external lightmaps
5581                 FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
5582                 inpixels[0] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, 0), false, false, false, NULL);
5583                 if(!inpixels[0])
5584                         return;
5585                 else
5586                         Con_Printf("Using external lightmaps\n");
5587
5588                 // using EXTERNAL lightmaps instead
5589                 if(image_width != (int) CeilPowerOf2(image_width) || image_width != image_height)
5590                         Con_Printf("Mod_Q3BSP_LoadLightmaps: irregularly sized external lightmap in %s",loadmodel->name);
5591
5592                 size = image_width;
5593                 bytesperpixel = 4;
5594                 rgbmap[0] = 0;
5595                 rgbmap[1] = 1;
5596                 rgbmap[2] = 2;
5597                 external = true;
5598
5599                 for(count = 1; ; ++count)
5600                 {
5601                         inpixels[count] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, count), false, false, false, NULL);
5602                         if(!inpixels[count])
5603                                 break; // we got all of them
5604                         if(image_width != size || image_height != size)
5605                         {
5606                                 Mem_Free(inpixels[count]);
5607                                 inpixels[count] = NULL;
5608                                 Con_Printf("Mod_Q3BSP_LoadLightmaps: mismatched lightmap size in %s - external lightmap %s/lm_%04d does not match earlier ones\n", loadmodel->name, mapname, count);
5609                                 break;
5610                         }
5611                 }
5612         }
5613
5614         loadmodel->brushq3.lightmapsize = size;
5615         loadmodel->brushq3.num_originallightmaps = count;
5616
5617         // now check the surfaces to see if any of them index an odd numbered
5618         // lightmap, if so this is not a deluxemapped bsp file
5619         //
5620         // also check what lightmaps are actually used, because q3map2 sometimes
5621         // (always?) makes an unused one at the end, which
5622         // q3map2 sometimes (or always?) makes a second blank lightmap for no
5623         // reason when only one lightmap is used, which can throw off the
5624         // deluxemapping detection method, so check 2-lightmap bsp's specifically
5625         // to see if the second lightmap is blank, if so it is not deluxemapped.
5626         // VorteX: autodetect only if previous attempt to find "deluxeMaps" key
5627         // in Mod_Q3BSP_LoadEntities was failed
5628         if (!loadmodel->brushq3.deluxemapping)
5629         {
5630                 loadmodel->brushq3.deluxemapping = !(count & 1);
5631                 loadmodel->brushq3.deluxemapping_modelspace = true;
5632                 endlightmap = 0;
5633                 if (loadmodel->brushq3.deluxemapping)
5634                 {
5635                         int facecount = faceslump->filelen / sizeof(q3dface_t);
5636                         q3dface_t *faces = (q3dface_t *)(mod_base + faceslump->fileofs);
5637                         for (i = 0;i < facecount;i++)
5638                         {
5639                                 j = LittleLong(faces[i].lightmapindex);
5640                                 if (j >= 0)
5641                                 {
5642                                         endlightmap = max(endlightmap, j + 1);
5643                                         if ((j & 1) || j + 1 >= count)
5644                                         {
5645                                                 loadmodel->brushq3.deluxemapping = false;
5646                                                 break;
5647                                         }
5648                                 }
5649                         }
5650                 }
5651
5652                 // q3map2 sometimes (or always?) makes a second blank lightmap for no
5653                 // reason when only one lightmap is used, which can throw off the
5654                 // deluxemapping detection method, so check 2-lightmap bsp's specifically
5655                 // to see if the second lightmap is blank, if so it is not deluxemapped.
5656                 //
5657                 // further research has shown q3map2 sometimes creates a deluxemap and two
5658                 // blank lightmaps, which must be handled properly as well
5659                 if (endlightmap == 1 && count > 1)
5660                 {
5661                         c = inpixels[1];
5662                         for (i = 0;i < size*size;i++)
5663                         {
5664                                 if (c[bytesperpixel*i + rgbmap[0]])
5665                                         break;
5666                                 if (c[bytesperpixel*i + rgbmap[1]])
5667                                         break;
5668                                 if (c[bytesperpixel*i + rgbmap[2]])
5669                                         break;
5670                         }
5671                         if (i == size*size)
5672                         {
5673                                 // all pixels in the unused lightmap were black...
5674                                 loadmodel->brushq3.deluxemapping = false;
5675                         }
5676                 }
5677         }
5678
5679         Con_Printf("%s is %sdeluxemapped\n", loadmodel->name, loadmodel->brushq3.deluxemapping ? "" : "not ");
5680
5681         // figure out what the most reasonable merge power is within limits
5682
5683         // find the appropriate NxN dimensions to merge to, to avoid wasted space
5684         realcount = count >> (int)loadmodel->brushq3.deluxemapping;
5685
5686         // figure out how big the merged texture has to be
5687         mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
5688         mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
5689         while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
5690                 mergegoal /= 2;
5691         mergedwidth = mergegoal;
5692         mergedheight = mergegoal;
5693         // choose non-square size (2x1 aspect) if only half the space is used;
5694         // this really only happens when the entire set fits in one texture, if
5695         // there are multiple textures, we don't worry about shrinking the last
5696         // one to fit, because the driver prefers the same texture size on
5697         // consecutive draw calls...
5698         if (mergedwidth * mergedheight / 2 >= size*size*realcount)
5699                 mergedheight /= 2;
5700
5701         loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
5702         loadmodel->brushq3.num_lightmapmergedheightpower = 0;
5703         while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
5704                 loadmodel->brushq3.num_lightmapmergedwidthpower++;
5705         while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
5706                 loadmodel->brushq3.num_lightmapmergedheightpower++;
5707         loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
5708
5709         powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
5710         powery = loadmodel->brushq3.num_lightmapmergedheightpower;
5711         powerxy = powerx+powery;
5712         powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
5713
5714         mergedcolumns = 1 << powerx;
5715         mergedrows = 1 << powery;
5716         mergedrowsxcolumns = 1 << powerxy;
5717
5718         loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
5719         loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5720         if (loadmodel->brushq3.deluxemapping)
5721                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5722
5723         mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
5724         mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
5725         for (i = 0;i < count;i++)
5726         {
5727                 // figure out which merged lightmap texture this fits into
5728                 realindex = i >> (int)loadmodel->brushq3.deluxemapping;
5729                 lightmapindex = i >> powerdxy;
5730
5731                 // choose the destination address
5732                 mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
5733                 mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
5734                 if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
5735                         Con_DPrintf("copying original lightmap %i (%ix%i) to %i (at %i,%i)\n", i, size, size, lightmapindex, (realindex & (mergedcolumns-1))*size, ((realindex >> powerx) & (mergedrows-1))*size);
5736
5737                 // convert pixels from RGB or BGRA while copying them into the destination rectangle
5738                 for (j = 0;j < size;j++)
5739                 for (k = 0;k < size;k++)
5740                 {
5741                         mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
5742                         mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
5743                         mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
5744                         mergebuf[(j*mergedwidth+k)*4+3] = 255;
5745                 }
5746
5747                 // upload texture if this was the last tile being written to the texture
5748                 if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
5749                 {
5750                         if (loadmodel->brushq3.deluxemapping && (i & 1))
5751                                 loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%04i", lightmapindex), mergedwidth, mergedheight, mergeddeluxepixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5752                         else
5753                         {
5754                                 if(mod_q3bsp_sRGBlightmaps.integer)
5755                                 {
5756                                         textype_t t;
5757                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5758                                         {
5759                                                 t = TEXTYPE_BGRA; // in stupid fallback mode, we upload lightmaps in sRGB form and just fix their brightness
5760                                                 // we fix the brightness consistently via lightmapscale
5761                                         }
5762                                         else
5763                                                 t = TEXTYPE_SRGB_BGRA; // normally, we upload lightmaps in sRGB form (possibly downconverted to linear)
5764                                         loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, t, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5765                                 }
5766                                 else
5767                                 {
5768                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5769                                                 Image_MakesRGBColorsFromLinear_Lightmap(mergedpixels, mergedpixels, mergedwidth * mergedheight);
5770                                         loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
5771                                 }
5772                         }
5773                 }
5774         }
5775
5776         if (mergeddeluxepixels)
5777                 Mem_Free(mergeddeluxepixels);
5778         Mem_Free(mergedpixels);
5779         if(external)
5780         {
5781                 for(i = 0; i < count; ++i)
5782                         Mem_Free(inpixels[i]);
5783         }
5784 }
5785
5786 typedef struct patchtess_s
5787 {
5788         patchinfo_t info;
5789
5790         // Auxiliary data used only by patch loading code in Mod_Q3BSP_LoadFaces
5791         int surface_id;
5792         float lodgroup[6];
5793         float *originalvertex3f;
5794 } patchtess_t;
5795
5796 #define PATCHTESS_SAME_LODGROUP(a,b) \
5797         ( \
5798                 (a).lodgroup[0] == (b).lodgroup[0] && \
5799                 (a).lodgroup[1] == (b).lodgroup[1] && \
5800                 (a).lodgroup[2] == (b).lodgroup[2] && \
5801                 (a).lodgroup[3] == (b).lodgroup[3] && \
5802                 (a).lodgroup[4] == (b).lodgroup[4] && \
5803                 (a).lodgroup[5] == (b).lodgroup[5] \
5804         )
5805
5806 static void Mod_Q3BSP_LoadFaces(lump_t *l)
5807 {
5808         q3dface_t *in, *oldin;
5809         msurface_t *out, *oldout;
5810         int i, oldi, j, n, count, invalidelements, patchsize[2], finalwidth, finalheight, xtess, ytess, finalvertices, finaltriangles, firstvertex, firstelement, type, oldnumtriangles, oldnumtriangles2, meshvertices, meshtriangles, collisionvertices, collisiontriangles, numvertices, numtriangles, cxtess, cytess;
5811         float lightmaptcbase[2], lightmaptcscale[2];
5812         //int *originalelement3i;
5813         float *originalvertex3f;
5814         //float *originalsvector3f;
5815         //float *originaltvector3f;
5816         float *originalnormal3f;
5817         float *originalcolor4f;
5818         float *originaltexcoordtexture2f;
5819         float *originaltexcoordlightmap2f;
5820         float *surfacecollisionvertex3f;
5821         int *surfacecollisionelement3i;
5822         float *v;
5823         patchtess_t *patchtess = NULL;
5824         int patchtesscount = 0;
5825         qbool again;
5826
5827         in = (q3dface_t *)(mod_base + l->fileofs);
5828         if (l->filelen % sizeof(*in))
5829                 Host_Error("Mod_Q3BSP_LoadFaces: funny lump size in %s",loadmodel->name);
5830         count = l->filelen / sizeof(*in);
5831         out = (msurface_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5832
5833         loadmodel->data_surfaces = out;
5834         loadmodel->num_surfaces = count;
5835
5836         if(count > 0)
5837                 patchtess = (patchtess_t*) Mem_Alloc(tempmempool, count * sizeof(*patchtess));
5838
5839         i = 0;
5840         oldi = i;
5841         oldin = in;
5842         oldout = out;
5843         meshvertices = 0;
5844         meshtriangles = 0;
5845         for (;i < count;i++, in++, out++)
5846         {
5847                 // check face type first
5848                 type = LittleLong(in->type);
5849                 if (type != Q3FACETYPE_FLAT
5850                  && type != Q3FACETYPE_PATCH
5851                  && type != Q3FACETYPE_MESH
5852                  && type != Q3FACETYPE_FLARE)
5853                 {
5854                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: unknown face type %i\n", i, type);
5855                         continue;
5856                 }
5857
5858                 n = LittleLong(in->textureindex);
5859                 if (n < 0 || n >= loadmodel->num_textures)
5860                 {
5861                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: invalid textureindex %i (%i textures)\n", i, n, loadmodel->num_textures);
5862                         continue;
5863                 }
5864                 out->texture = loadmodel->data_textures + n;
5865                 n = LittleLong(in->effectindex);
5866                 if (n < -1 || n >= loadmodel->brushq3.num_effects)
5867                 {
5868                         if (developer_extra.integer)
5869                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid effectindex %i (%i effects)\n", i, out->texture->name, n, loadmodel->brushq3.num_effects);
5870                         n = -1;
5871                 }
5872                 if (n == -1)
5873                         out->effect = NULL;
5874                 else
5875                         out->effect = loadmodel->brushq3.data_effects + n;
5876
5877                 if (cls.state != ca_dedicated)
5878                 {
5879                         out->lightmaptexture = NULL;
5880                         out->deluxemaptexture = r_texture_blanknormalmap;
5881                         n = LittleLong(in->lightmapindex);
5882                         if (n < 0)
5883                                 n = -1;
5884                         else if (n >= loadmodel->brushq3.num_originallightmaps)
5885                         {
5886                                 if(loadmodel->brushq3.num_originallightmaps != 0)
5887                                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
5888                                 n = -1;
5889                         }
5890                         else
5891                         {
5892                                 out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5893                                 if (loadmodel->brushq3.deluxemapping)
5894                                         out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5895                                 loadmodel->lit = true;
5896                         }
5897                 }
5898
5899                 firstvertex = LittleLong(in->firstvertex);
5900                 numvertices = LittleLong(in->numvertices);
5901                 firstelement = LittleLong(in->firstelement);
5902                 numtriangles = LittleLong(in->numelements) / 3;
5903                 if (numtriangles * 3 != LittleLong(in->numelements))
5904                 {
5905                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): numelements %i is not a multiple of 3\n", i, out->texture->name, LittleLong(in->numelements));
5906                         continue;
5907                 }
5908                 if (firstvertex < 0 || firstvertex + numvertices > loadmodel->brushq3.num_vertices)
5909                 {
5910                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid vertex range %i : %i (%i vertices)\n", i, out->texture->name, firstvertex, firstvertex + numvertices, loadmodel->brushq3.num_vertices);
5911                         continue;
5912                 }
5913                 if (firstelement < 0 || firstelement + numtriangles * 3 > loadmodel->brushq3.num_triangles * 3)
5914                 {
5915                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid element range %i : %i (%i elements)\n", i, out->texture->name, firstelement, firstelement + numtriangles * 3, loadmodel->brushq3.num_triangles * 3);
5916                         continue;
5917                 }
5918                 switch(type)
5919                 {
5920                 case Q3FACETYPE_FLAT:
5921                 case Q3FACETYPE_MESH:
5922                         // no processing necessary
5923                         break;
5924                 case Q3FACETYPE_PATCH:
5925                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
5926                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
5927                         if (numvertices != (patchsize[0] * patchsize[1]) || patchsize[0] < 3 || patchsize[1] < 3 || !(patchsize[0] & 1) || !(patchsize[1] & 1) || patchsize[0] * patchsize[1] >= (cls.state == ca_dedicated ? mod_q3bsp_curves_subdivisions_maxvertices.integer : min(r_subdivisions_maxvertices.integer, mod_q3bsp_curves_subdivisions_maxvertices.integer)))
5928                         {
5929                                 Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid patchsize %ix%i\n", i, out->texture->name, patchsize[0], patchsize[1]);
5930                                 continue;
5931                         }
5932                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
5933
5934                         // convert patch to Q3FACETYPE_MESH
5935                         xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5936                         ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5937                         // bound to user settings
5938                         xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
5939                         ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
5940                         // bound to sanity settings
5941                         xtess = bound(0, xtess, 1024);
5942                         ytess = bound(0, ytess, 1024);
5943
5944                         // lower quality collision patches! Same procedure as before, but different cvars
5945                         // convert patch to Q3FACETYPE_MESH
5946                         cxtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, mod_q3bsp_curves_subdivisions_tolerance.value);
5947                         cytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, mod_q3bsp_curves_subdivisions_tolerance.value);
5948                         // bound to user settings
5949                         cxtess = bound(mod_q3bsp_curves_subdivisions_mintess.integer, cxtess, mod_q3bsp_curves_subdivisions_maxtess.integer);
5950                         cytess = bound(mod_q3bsp_curves_subdivisions_mintess.integer, cytess, mod_q3bsp_curves_subdivisions_maxtess.integer);
5951                         // bound to sanity settings
5952                         cxtess = bound(0, cxtess, 1024);
5953                         cytess = bound(0, cytess, 1024);
5954
5955                         // store it for the LOD grouping step
5956                         patchtess[patchtesscount].info.xsize = patchsize[0];
5957                         patchtess[patchtesscount].info.ysize = patchsize[1];
5958                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].xtess = xtess;
5959                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].ytess = ytess;
5960                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].xtess = cxtess;
5961                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].ytess = cytess;
5962
5963                         patchtess[patchtesscount].surface_id = i;
5964                         patchtess[patchtesscount].lodgroup[0] = LittleFloat(in->specific.patch.mins[0]);
5965                         patchtess[patchtesscount].lodgroup[1] = LittleFloat(in->specific.patch.mins[1]);
5966                         patchtess[patchtesscount].lodgroup[2] = LittleFloat(in->specific.patch.mins[2]);
5967                         patchtess[patchtesscount].lodgroup[3] = LittleFloat(in->specific.patch.maxs[0]);
5968                         patchtess[patchtesscount].lodgroup[4] = LittleFloat(in->specific.patch.maxs[1]);
5969                         patchtess[patchtesscount].lodgroup[5] = LittleFloat(in->specific.patch.maxs[2]);
5970                         patchtess[patchtesscount].originalvertex3f = originalvertex3f;
5971                         ++patchtesscount;
5972                         break;
5973                 case Q3FACETYPE_FLARE:
5974                         if (developer_extra.integer)
5975                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): Q3FACETYPE_FLARE not supported (yet)\n", i, out->texture->name);
5976                         // don't render it
5977                         continue;
5978                 }
5979                 out->num_vertices = numvertices;
5980                 out->num_triangles = numtriangles;
5981                 meshvertices += out->num_vertices;
5982                 meshtriangles += out->num_triangles;
5983         }
5984
5985         // Fix patches tesselations so that they make no seams
5986         do
5987         {
5988                 again = false;
5989                 for(i = 0; i < patchtesscount; ++i)
5990                 {
5991                         for(j = i+1; j < patchtesscount; ++j)
5992                         {
5993                                 if (!PATCHTESS_SAME_LODGROUP(patchtess[i], patchtess[j]))
5994                                         continue;
5995
5996                                 if (Q3PatchAdjustTesselation(3, &patchtess[i].info, patchtess[i].originalvertex3f, &patchtess[j].info, patchtess[j].originalvertex3f) )
5997                                         again = true;
5998                         }
5999                 }
6000         }
6001         while (again);
6002
6003         // Calculate resulting number of triangles
6004         collisionvertices = 0;
6005         collisiontriangles = 0;
6006         for(i = 0; i < patchtesscount; ++i)
6007         {
6008                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
6009                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_VISUAL].ytess);
6010                 numvertices = finalwidth * finalheight;
6011                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6012
6013                 oldout[patchtess[i].surface_id].num_vertices = numvertices;
6014                 oldout[patchtess[i].surface_id].num_triangles = numtriangles;
6015                 meshvertices += oldout[patchtess[i].surface_id].num_vertices;
6016                 meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
6017
6018                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_COLLISION].xtess);
6019                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_COLLISION].ytess);
6020                 numvertices = finalwidth * finalheight;
6021                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6022
6023                 oldout[patchtess[i].surface_id].num_collisionvertices = numvertices;
6024                 oldout[patchtess[i].surface_id].num_collisiontriangles = numtriangles;
6025                 collisionvertices += oldout[patchtess[i].surface_id].num_collisionvertices;
6026                 collisiontriangles += oldout[patchtess[i].surface_id].num_collisiontriangles;
6027         }
6028
6029         i = oldi;
6030         in = oldin;
6031         out = oldout;
6032         Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true);
6033         if (collisiontriangles)
6034         {
6035                 loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
6036                 loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
6037         }
6038         meshvertices = 0;
6039         meshtriangles = 0;
6040         collisionvertices = 0;
6041         collisiontriangles = 0;
6042         for (;i < count && meshvertices + out->num_vertices <= loadmodel->surfmesh.num_vertices;i++, in++, out++)
6043         {
6044                 if (out->num_vertices < 3 || out->num_triangles < 1)
6045                         continue;
6046
6047                 type = LittleLong(in->type);
6048                 firstvertex = LittleLong(in->firstvertex);
6049                 firstelement = LittleLong(in->firstelement);
6050                 out->num_firstvertex = meshvertices;
6051                 out->num_firsttriangle = meshtriangles;
6052                 out->num_firstcollisiontriangle = collisiontriangles;
6053                 switch(type)
6054                 {
6055                 case Q3FACETYPE_FLAT:
6056                 case Q3FACETYPE_MESH:
6057                         // no processing necessary, except for lightmap merging
6058                         for (j = 0;j < out->num_vertices;j++)
6059                         {
6060                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 0];
6061                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 1];
6062                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 2];
6063                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 0];
6064                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 1];
6065                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 2];
6066                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 0];
6067                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 1];
6068                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 0];
6069                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 1];
6070                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 0] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 0];
6071                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 1] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 1];
6072                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 2] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 2];
6073                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 3] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 3];
6074                         }
6075                         for (j = 0;j < out->num_triangles*3;j++)
6076                                 (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = loadmodel->brushq3.data_element3i[firstelement + j] + out->num_firstvertex;
6077                         break;
6078                 case Q3FACETYPE_PATCH:
6079                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
6080                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
6081                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
6082                         originalnormal3f = loadmodel->brushq3.data_normal3f + firstvertex * 3;
6083                         originaltexcoordtexture2f = loadmodel->brushq3.data_texcoordtexture2f + firstvertex * 2;
6084                         originaltexcoordlightmap2f = loadmodel->brushq3.data_texcoordlightmap2f + firstvertex * 2;
6085                         originalcolor4f = loadmodel->brushq3.data_color4f + firstvertex * 4;
6086
6087                         xtess = ytess = cxtess = cytess = -1;
6088                         for(j = 0; j < patchtesscount; ++j)
6089                                 if(patchtess[j].surface_id == i)
6090                                 {
6091                                         xtess = patchtess[j].info.lods[PATCH_LOD_VISUAL].xtess;
6092                                         ytess = patchtess[j].info.lods[PATCH_LOD_VISUAL].ytess;
6093                                         cxtess = patchtess[j].info.lods[PATCH_LOD_COLLISION].xtess;
6094                                         cytess = patchtess[j].info.lods[PATCH_LOD_COLLISION].ytess;
6095                                         break;
6096                                 }
6097                         if(xtess == -1)
6098                         {
6099                                 Con_Printf(CON_ERROR "ERROR: patch %d isn't preprocessed?!?\n", i);
6100                                 xtess = ytess = cxtess = cytess = 0;
6101                         }
6102
6103                         finalwidth = Q3PatchDimForTess(patchsize[0],xtess); //((patchsize[0] - 1) * xtess) + 1;
6104                         finalheight = Q3PatchDimForTess(patchsize[1],ytess); //((patchsize[1] - 1) * ytess) + 1;
6105                         finalvertices = finalwidth * finalheight;
6106                         oldnumtriangles = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6107                         type = Q3FACETYPE_MESH;
6108                         // generate geometry
6109                         // (note: normals are skipped because they get recalculated)
6110                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, xtess, ytess);
6111                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalnormal3f, xtess, ytess);
6112                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordtexture2f, xtess, ytess);
6113                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordlightmap2f, xtess, ytess);
6114                         Q3PatchTesselateFloat(4, sizeof(float[4]), (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[4]), originalcolor4f, xtess, ytess);
6115                         Q3PatchTriangleElements((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), finalwidth, finalheight, out->num_firstvertex);
6116
6117                         out->num_triangles = Mod_RemoveDegenerateTriangles(out->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), loadmodel->surfmesh.data_vertex3f);
6118
6119                         if (developer_extra.integer)
6120                         {
6121                                 if (out->num_triangles < finaltriangles)
6122                                         Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve subdivided to %i vertices / %i triangles, %i degenerate triangles removed (leaving %i)\n", patchsize[0], patchsize[1], out->num_vertices, finaltriangles, finaltriangles - out->num_triangles, out->num_triangles);
6123                                 else
6124                                         Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve subdivided to %i vertices / %i triangles\n", patchsize[0], patchsize[1], out->num_vertices, out->num_triangles);
6125                         }
6126                         // q3map does not put in collision brushes for curves... ugh
6127                         // build the lower quality collision geometry
6128                         finalwidth = Q3PatchDimForTess(patchsize[0],cxtess); //((patchsize[0] - 1) * cxtess) + 1;
6129                         finalheight = Q3PatchDimForTess(patchsize[1],cytess); //((patchsize[1] - 1) * cytess) + 1;
6130                         finalvertices = finalwidth * finalheight;
6131                         oldnumtriangles2 = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6132
6133                         // store collision geometry for BIH collision tree
6134                         out->num_collisionvertices = finalvertices;
6135                         out->num_collisiontriangles = finaltriangles;
6136                         surfacecollisionvertex3f = loadmodel->brush.data_collisionvertex3f + collisionvertices * 3;
6137                         surfacecollisionelement3i = loadmodel->brush.data_collisionelement3i + collisiontriangles * 3;
6138                         Q3PatchTesselateFloat(3, sizeof(float[3]), surfacecollisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
6139                         Q3PatchTriangleElements(surfacecollisionelement3i, finalwidth, finalheight, collisionvertices);
6140                         Mod_SnapVertices(3, finalvertices, surfacecollisionvertex3f, 1);
6141                         out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, surfacecollisionelement3i, surfacecollisionelement3i, loadmodel->brush.data_collisionvertex3f);
6142
6143                         if (developer_extra.integer)
6144                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve became %i:%i vertices / %i:%i triangles (%i:%i degenerate)\n", patchsize[0], patchsize[1], out->num_vertices, out->num_collisionvertices, oldnumtriangles, oldnumtriangles2, oldnumtriangles - out->num_triangles, oldnumtriangles2 - out->num_collisiontriangles);
6145
6146                         collisionvertices += finalvertices;
6147                         collisiontriangles += out->num_collisiontriangles;
6148                         break;
6149                 default:
6150                         break;
6151                 }
6152                 meshvertices += out->num_vertices;
6153                 meshtriangles += out->num_triangles;
6154                 for (j = 0, invalidelements = 0;j < out->num_triangles * 3;j++)
6155                         if ((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] < out->num_firstvertex || (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] >= out->num_firstvertex + out->num_vertices)
6156                                 invalidelements++;
6157                 if (invalidelements)
6158                 {
6159                         Con_Printf(CON_WARN "Mod_Q3BSP_LoadFaces: Warning: face #%i has %i invalid elements, type = %i, texture->name = \"%s\", texture->surfaceflags = %i, firstvertex = %i, numvertices = %i, firstelement = %i, numelements = %i, elements list:\n", i, invalidelements, type, out->texture->name, out->texture->surfaceflags, firstvertex, out->num_vertices, firstelement, out->num_triangles * 3);
6160                         for (j = 0;j < out->num_triangles * 3;j++)
6161                         {
6162                                 Con_Printf(" %i", (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] - out->num_firstvertex);
6163                                 if ((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] < out->num_firstvertex || (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] >= out->num_firstvertex + out->num_vertices)
6164                                         (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = out->num_firstvertex;
6165                         }
6166                         Con_Print("\n");
6167                 }
6168                 // calculate a bounding box
6169                 VectorClear(out->mins);
6170                 VectorClear(out->maxs);
6171                 if (out->num_vertices)
6172                 {
6173                         if (cls.state != ca_dedicated && out->lightmaptexture)
6174                         {
6175                                 // figure out which part of the merged lightmap this fits into
6176                                 int lightmapindex = LittleLong(in->lightmapindex) >> (loadmodel->brushq3.deluxemapping ? 1 : 0);
6177                                 int mergewidth = R_TextureWidth(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6178                                 int mergeheight = R_TextureHeight(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6179                                 lightmapindex &= mergewidth * mergeheight - 1;
6180                                 lightmaptcscale[0] = 1.0f / mergewidth;
6181                                 lightmaptcscale[1] = 1.0f / mergeheight;
6182                                 lightmaptcbase[0] = (lightmapindex % mergewidth) * lightmaptcscale[0];
6183                                 lightmaptcbase[1] = (lightmapindex / mergewidth) * lightmaptcscale[1];
6184                                 // modify the lightmap texcoords to match this region of the merged lightmap
6185                                 for (j = 0, v = loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex;j < out->num_vertices;j++, v += 2)
6186                                 {
6187                                         v[0] = v[0] * lightmaptcscale[0] + lightmaptcbase[0];
6188                                         v[1] = v[1] * lightmaptcscale[1] + lightmaptcbase[1];
6189                                 }
6190                         }
6191                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->mins);
6192                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->maxs);
6193                         for (j = 1, v = (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex) + 3;j < out->num_vertices;j++, v += 3)
6194                         {
6195                                 out->mins[0] = min(out->mins[0], v[0]);
6196                                 out->maxs[0] = max(out->maxs[0], v[0]);
6197                                 out->mins[1] = min(out->mins[1], v[1]);
6198                                 out->maxs[1] = max(out->maxs[1], v[1]);
6199                                 out->mins[2] = min(out->mins[2], v[2]);
6200                                 out->maxs[2] = max(out->maxs[2], v[2]);
6201                         }
6202                         out->mins[0] -= 1.0f;
6203                         out->mins[1] -= 1.0f;
6204                         out->mins[2] -= 1.0f;
6205                         out->maxs[0] += 1.0f;
6206                         out->maxs[1] += 1.0f;
6207                         out->maxs[2] += 1.0f;
6208                 }
6209                 // set lightmap styles for consistency with q1bsp
6210                 //out->lightmapinfo->styles[0] = 0;
6211                 //out->lightmapinfo->styles[1] = 255;
6212                 //out->lightmapinfo->styles[2] = 255;
6213                 //out->lightmapinfo->styles[3] = 255;
6214         }
6215
6216         i = oldi;
6217         out = oldout;
6218         for (;i < count;i++, out++)
6219         {
6220                 if(out->num_vertices && out->num_triangles)
6221                         continue;
6222                 if(out->num_vertices == 0)
6223                 {
6224                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6225                         if(out->num_triangles == 0)
6226                                 Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6227                 }
6228                 else if(out->num_triangles == 0)
6229                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s, near %f %f %f) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)",
6230                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
6231                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
6232                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
6233         }
6234
6235         // for per pixel lighting
6236         Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
6237
6238         // generate ushort elements array if possible
6239         if (loadmodel->surfmesh.data_element3s)
6240                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
6241                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
6242
6243         // free the no longer needed vertex data
6244         loadmodel->brushq3.num_vertices = 0;
6245         if (loadmodel->brushq3.data_vertex3f)
6246                 Mem_Free(loadmodel->brushq3.data_vertex3f);
6247         loadmodel->brushq3.data_vertex3f = NULL;
6248         loadmodel->brushq3.data_normal3f = NULL;
6249         loadmodel->brushq3.data_texcoordtexture2f = NULL;
6250         loadmodel->brushq3.data_texcoordlightmap2f = NULL;
6251         loadmodel->brushq3.data_color4f = NULL;
6252         // free the no longer needed triangle data
6253         loadmodel->brushq3.num_triangles = 0;
6254         if (loadmodel->brushq3.data_element3i)
6255                 Mem_Free(loadmodel->brushq3.data_element3i);
6256         loadmodel->brushq3.data_element3i = NULL;
6257
6258         if(patchtess)
6259                 Mem_Free(patchtess);
6260 }
6261
6262 static void Mod_Q3BSP_LoadModels(lump_t *l)
6263 {
6264         q3dmodel_t *in;
6265         q3dmodel_t *out;
6266         int i, j, n, c, count;
6267
6268         in = (q3dmodel_t *)(mod_base + l->fileofs);
6269         if (l->filelen % sizeof(*in))
6270                 Host_Error("Mod_Q3BSP_LoadModels: funny lump size in %s",loadmodel->name);
6271         count = l->filelen / sizeof(*in);
6272         out = (q3dmodel_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6273
6274         loadmodel->brushq3.data_models = out;
6275         loadmodel->brushq3.num_models = count;
6276
6277         for (i = 0;i < count;i++, in++, out++)
6278         {
6279                 for (j = 0;j < 3;j++)
6280                 {
6281                         out->mins[j] = LittleFloat(in->mins[j]);
6282                         out->maxs[j] = LittleFloat(in->maxs[j]);
6283                 }
6284                 n = LittleLong(in->firstface);
6285                 c = LittleLong(in->numfaces);
6286                 if (n < 0 || n + c > loadmodel->num_surfaces)
6287                         Host_Error("Mod_Q3BSP_LoadModels: invalid face range %i : %i (%i faces)", n, n + c, loadmodel->num_surfaces);
6288                 out->firstface = n;
6289                 out->numfaces = c;
6290                 n = LittleLong(in->firstbrush);
6291                 c = LittleLong(in->numbrushes);
6292                 if (n < 0 || n + c > loadmodel->brush.num_brushes)
6293                         Host_Error("Mod_Q3BSP_LoadModels: invalid brush range %i : %i (%i brushes)", n, n + c, loadmodel->brush.num_brushes);
6294                 out->firstbrush = n;
6295                 out->numbrushes = c;
6296         }
6297 }
6298
6299 static void Mod_Q3BSP_LoadLeafBrushes(lump_t *l)
6300 {
6301         int *in;
6302         int *out;
6303         int i, n, count;
6304
6305         in = (int *)(mod_base + l->fileofs);
6306         if (l->filelen % sizeof(*in))
6307                 Host_Error("Mod_Q3BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
6308         count = l->filelen / sizeof(*in);
6309         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6310
6311         loadmodel->brush.data_leafbrushes = out;
6312         loadmodel->brush.num_leafbrushes = count;
6313
6314         for (i = 0;i < count;i++, in++, out++)
6315         {
6316                 n = LittleLong(*in);
6317                 if (n < 0 || n >= loadmodel->brush.num_brushes)
6318                         Host_Error("Mod_Q3BSP_LoadLeafBrushes: invalid brush index %i (%i brushes)", n, loadmodel->brush.num_brushes);
6319                 *out = n;
6320         }
6321 }
6322
6323 static void Mod_Q3BSP_LoadLeafFaces(lump_t *l)
6324 {
6325         int *in;
6326         int *out;
6327         int i, n, count;
6328
6329         in = (int *)(mod_base + l->fileofs);
6330         if (l->filelen % sizeof(*in))
6331                 Host_Error("Mod_Q3BSP_LoadLeafFaces: funny lump size in %s",loadmodel->name);
6332         count = l->filelen / sizeof(*in);
6333         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6334
6335         loadmodel->brush.data_leafsurfaces = out;
6336         loadmodel->brush.num_leafsurfaces = count;
6337
6338         for (i = 0;i < count;i++, in++, out++)
6339         {
6340                 n = LittleLong(*in);
6341                 if (n < 0 || n >= loadmodel->num_surfaces)
6342                         Host_Error("Mod_Q3BSP_LoadLeafFaces: invalid face index %i (%i faces)", n, loadmodel->num_surfaces);
6343                 *out = n;
6344         }
6345 }
6346
6347 static void Mod_Q3BSP_LoadLeafs(lump_t *l)
6348 {
6349         q3dleaf_t *in;
6350         mleaf_t *out;
6351         int i, j, n, c, count;
6352
6353         in = (q3dleaf_t *)(mod_base + l->fileofs);
6354         if (l->filelen % sizeof(*in))
6355                 Host_Error("Mod_Q3BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
6356         count = l->filelen / sizeof(*in);
6357         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6358
6359         loadmodel->brush.data_leafs = out;
6360         loadmodel->brush.num_leafs = count;
6361
6362         for (i = 0;i < count;i++, in++, out++)
6363         {
6364                 out->parent = NULL;
6365                 out->plane = NULL;
6366                 out->clusterindex = LittleLong(in->clusterindex);
6367                 out->areaindex = LittleLong(in->areaindex);
6368                 for (j = 0;j < 3;j++)
6369                 {
6370                         // yes the mins/maxs are ints
6371                         // bones_was_here: the cast prevents signed underflow with poon-wood.bsp
6372                         out->mins[j] = (vec_t)LittleLong(in->mins[j]) - 1;
6373                         out->maxs[j] = (vec_t)LittleLong(in->maxs[j]) + 1;
6374                 }
6375                 n = LittleLong(in->firstleafface);
6376                 c = LittleLong(in->numleaffaces);
6377                 if (n < 0 || n + c > loadmodel->brush.num_leafsurfaces)
6378                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafsurface range %i : %i (%i leafsurfaces)", n, n + c, loadmodel->brush.num_leafsurfaces);
6379                 out->firstleafsurface = loadmodel->brush.data_leafsurfaces + n;
6380                 out->numleafsurfaces = c;
6381                 n = LittleLong(in->firstleafbrush);
6382                 c = LittleLong(in->numleafbrushes);
6383                 if (n < 0 || n + c > loadmodel->brush.num_leafbrushes)
6384                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafbrush range %i : %i (%i leafbrushes)", n, n + c, loadmodel->brush.num_leafbrushes);
6385                 out->firstleafbrush = loadmodel->brush.data_leafbrushes + n;
6386                 out->numleafbrushes = c;
6387         }
6388 }
6389
6390 static void Mod_Q3BSP_LoadNodes(lump_t *l)
6391 {
6392         q3dnode_t *in;
6393         mnode_t *out;
6394         int i, j, n, count;
6395
6396         in = (q3dnode_t *)(mod_base + l->fileofs);
6397         if (l->filelen % sizeof(*in))
6398                 Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
6399         count = l->filelen / sizeof(*in);
6400         if (count == 0)
6401                 Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
6402         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6403
6404         loadmodel->brush.data_nodes = out;
6405         loadmodel->brush.num_nodes = count;
6406
6407         for (i = 0;i < count;i++, in++, out++)
6408         {
6409                 out->parent = NULL;
6410                 n = LittleLong(in->planeindex);
6411                 if (n < 0 || n >= loadmodel->brush.num_planes)
6412                         Host_Error("Mod_Q3BSP_LoadNodes: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
6413                 out->plane = loadmodel->brush.data_planes + n;
6414                 for (j = 0;j < 2;j++)
6415                 {
6416                         n = LittleLong(in->childrenindex[j]);
6417                         if (n >= 0)
6418                         {
6419                                 if (n >= loadmodel->brush.num_nodes)
6420                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child node index %i (%i nodes)", n, loadmodel->brush.num_nodes);
6421                                 out->children[j] = loadmodel->brush.data_nodes + n;
6422                         }
6423                         else
6424                         {
6425                                 n = -1 - n;
6426                                 if (n >= loadmodel->brush.num_leafs)
6427                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child leaf index %i (%i leafs)", n, loadmodel->brush.num_leafs);
6428                                 out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + n);
6429                         }
6430                 }
6431                 for (j = 0;j < 3;j++)
6432                 {
6433                         // yes the mins/maxs are ints
6434                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6435                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6436                 }
6437         }
6438
6439         // set the parent pointers
6440         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);
6441 }
6442
6443 static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
6444 {
6445         q3dlightgrid_t *in;
6446         q3dlightgrid_t *out;
6447         int count;
6448         int i;
6449         int texturesize[3];
6450         unsigned char *texturergba, *texturelayer[3], *texturepadding[2];
6451         double lightgridmatrix[4][4];
6452
6453         in = (q3dlightgrid_t *)(mod_base + l->fileofs);
6454         if (l->filelen % sizeof(*in))
6455                 Host_Error("Mod_Q3BSP_LoadLightGrid: funny lump size in %s",loadmodel->name);
6456         loadmodel->brushq3.num_lightgrid_scale[0] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[0];
6457         loadmodel->brushq3.num_lightgrid_scale[1] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[1];
6458         loadmodel->brushq3.num_lightgrid_scale[2] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[2];
6459         loadmodel->brushq3.num_lightgrid_imins[0] = (int)ceil(loadmodel->brushq3.data_models->mins[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6460         loadmodel->brushq3.num_lightgrid_imins[1] = (int)ceil(loadmodel->brushq3.data_models->mins[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6461         loadmodel->brushq3.num_lightgrid_imins[2] = (int)ceil(loadmodel->brushq3.data_models->mins[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6462         loadmodel->brushq3.num_lightgrid_imaxs[0] = (int)floor(loadmodel->brushq3.data_models->maxs[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6463         loadmodel->brushq3.num_lightgrid_imaxs[1] = (int)floor(loadmodel->brushq3.data_models->maxs[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6464         loadmodel->brushq3.num_lightgrid_imaxs[2] = (int)floor(loadmodel->brushq3.data_models->maxs[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6465         loadmodel->brushq3.num_lightgrid_isize[0] = loadmodel->brushq3.num_lightgrid_imaxs[0] - loadmodel->brushq3.num_lightgrid_imins[0] + 1;
6466         loadmodel->brushq3.num_lightgrid_isize[1] = loadmodel->brushq3.num_lightgrid_imaxs[1] - loadmodel->brushq3.num_lightgrid_imins[1] + 1;
6467         loadmodel->brushq3.num_lightgrid_isize[2] = loadmodel->brushq3.num_lightgrid_imaxs[2] - loadmodel->brushq3.num_lightgrid_imins[2] + 1;
6468         count = loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2];
6469         Matrix4x4_CreateScale3(&loadmodel->brushq3.num_lightgrid_indexfromworld, loadmodel->brushq3.num_lightgrid_scale[0], loadmodel->brushq3.num_lightgrid_scale[1], loadmodel->brushq3.num_lightgrid_scale[2]);
6470         Matrix4x4_ConcatTranslate(&loadmodel->brushq3.num_lightgrid_indexfromworld, -loadmodel->brushq3.num_lightgrid_imins[0] * loadmodel->brushq3.num_lightgrid_cellsize[0], -loadmodel->brushq3.num_lightgrid_imins[1] * loadmodel->brushq3.num_lightgrid_cellsize[1], -loadmodel->brushq3.num_lightgrid_imins[2] * loadmodel->brushq3.num_lightgrid_cellsize[2]);
6471
6472         // if lump is empty there is nothing to load, we can deal with that in the LightPoint code
6473         if (l->filelen)
6474         {
6475                 if (l->filelen < count * (int)sizeof(*in))
6476                 {
6477                         Con_Printf(CON_ERROR "Mod_Q3BSP_LoadLightGrid: invalid lightgrid lump size %i bytes, should be %i bytes (%ix%ix%i)", l->filelen, (int)(count * sizeof(*in)), loadmodel->brushq3.num_lightgrid_isize[0], loadmodel->brushq3.num_lightgrid_isize[1], loadmodel->brushq3.num_lightgrid_isize[2]);
6478                         return; // ignore the grid if we cannot understand it
6479                 }
6480                 if (l->filelen != count * (int)sizeof(*in))
6481                         Con_Printf(CON_WARN "Mod_Q3BSP_LoadLightGrid: Warning: calculated lightgrid size %i bytes does not match lump size %i\n", (int)(count * sizeof(*in)), l->filelen);
6482                 out = (q3dlightgrid_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6483                 loadmodel->brushq3.data_lightgrid = out;
6484                 loadmodel->brushq3.num_lightgrid = count;
6485                 // no swapping or validation necessary
6486                 memcpy(out, in, count * (int)sizeof(*out));
6487
6488                 if(mod_q3bsp_sRGBlightmaps.integer)
6489                 {
6490                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6491                         {
6492                                 // we fix the brightness consistently via lightmapscale
6493                         }
6494                         else
6495                         {
6496                                 for(i = 0; i < count; ++i)
6497                                 {
6498                                         out[i].ambientrgb[0] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6499                                         out[i].ambientrgb[1] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6500                                         out[i].ambientrgb[2] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6501                                         out[i].diffusergb[0] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[0]) * 255.0f + 0.5f);
6502                                         out[i].diffusergb[1] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[1]) * 255.0f + 0.5f);
6503                                         out[i].diffusergb[2] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[2]) * 255.0f + 0.5f);
6504                                 }
6505                         }
6506                 }
6507                 else
6508                 {
6509                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6510                         {
6511                                 for(i = 0; i < count; ++i)
6512                                 {
6513                                         out[i].ambientrgb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6514                                         out[i].ambientrgb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6515                                         out[i].ambientrgb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6516                                         out[i].diffusergb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[0]) * 255.0f + 0.5f);
6517                                         out[i].diffusergb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[1]) * 255.0f + 0.5f);
6518                                         out[i].diffusergb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[2]) * 255.0f + 0.5f);
6519                                 }
6520                         }
6521                         else
6522                         {
6523                                 // all is good
6524                         }
6525                 }
6526
6527                 if (mod_q3bsp_lightgrid_texture.integer)
6528                 {
6529                         // build a texture to hold the data for per-pixel sampling
6530                         // this has 3 different kinds of data stacked in it:
6531                         // ambient color
6532                         // bent-normal light color
6533                         // bent-normal light dir
6534
6535                         texturesize[0] = loadmodel->brushq3.num_lightgrid_isize[0];
6536                         texturesize[1] = loadmodel->brushq3.num_lightgrid_isize[1];
6537                         texturesize[2] = (loadmodel->brushq3.num_lightgrid_isize[2] + 2) * 3;
6538                         texturergba = (unsigned char*)Mem_Alloc(loadmodel->mempool, texturesize[0] * texturesize[1] * texturesize[2] * sizeof(char[4]));
6539                         texturelayer[0] = texturergba + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6540                         texturelayer[1] = texturelayer[0] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6541                         texturelayer[2] = texturelayer[1] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6542                         // the light dir layer needs padding above/below it that is a neutral unsigned normal (127,127,127,255)
6543                         texturepadding[0] = texturelayer[2] - loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6544                         texturepadding[1] = texturelayer[2] + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2] * 4;
6545                         for (i = 0; i < texturesize[0] * texturesize[1]; i++)
6546                         {
6547                                 texturepadding[0][i * 4] = texturepadding[1][i * 4] = 127;
6548                                 texturepadding[0][i * 4 + 1] = texturepadding[1][i * 4 + 1] = 127;
6549                                 texturepadding[0][i * 4 + 2] = texturepadding[1][i * 4 + 2] = 127;
6550                                 texturepadding[0][i * 4 + 3] = texturepadding[1][i * 4 + 3] = 255;
6551                         }
6552                         for (i = 0; i < count; i++)
6553                         {
6554                                 texturelayer[0][i * 4 + 0] = out[i].ambientrgb[0];
6555                                 texturelayer[0][i * 4 + 1] = out[i].ambientrgb[1];
6556                                 texturelayer[0][i * 4 + 2] = out[i].ambientrgb[2];
6557                                 texturelayer[0][i * 4 + 3] = 255;
6558                                 texturelayer[1][i * 4 + 0] = out[i].diffusergb[0];
6559                                 texturelayer[1][i * 4 + 1] = out[i].diffusergb[1];
6560                                 texturelayer[1][i * 4 + 2] = out[i].diffusergb[2];
6561                                 texturelayer[1][i * 4 + 3] = 255;
6562                                 // this uses the mod_md3_sin table because the values are
6563                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6564                                 // instead of a sine value
6565                                 texturelayer[2][i * 4 + 0] = (char)((mod_md3_sin[64 + out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6566                                 texturelayer[2][i * 4 + 1] = (char)((mod_md3_sin[out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6567                                 texturelayer[2][i * 4 + 2] = (char)((mod_md3_sin[64 + out[i].diffusepitch]) * 127 + 127);
6568                                 texturelayer[2][i * 4 + 3] = 255;
6569                         }
6570 #if 0
6571                         // debugging hack
6572                         int x, y, z;
6573                         for (z = 0; z < loadmodel->brushq3.num_lightgrid_isize[2]; z++)
6574                         {
6575                                 for (y = 0; y < loadmodel->brushq3.num_lightgrid_isize[1]; y++)
6576                                 {
6577                                         for (x = 0; x < loadmodel->brushq3.num_lightgrid_isize[0]; x++)
6578                                         {
6579                                                 i = (z * texturesize[1] + y) * texturesize[0] + x;
6580                                                 texturelayer[0][i * 4 + 0] = x * 256 / loadmodel->brushq3.num_lightgrid_isize[0];
6581                                                 texturelayer[0][i * 4 + 1] = y * 256 / loadmodel->brushq3.num_lightgrid_isize[1];
6582                                                 texturelayer[0][i * 4 + 2] = z * 256 / loadmodel->brushq3.num_lightgrid_isize[2];
6583                                         }
6584                                 }
6585                         }
6586 #endif
6587                         loadmodel->brushq3.lightgridtexturesize[0] = texturesize[0];
6588                         loadmodel->brushq3.lightgridtexturesize[1] = texturesize[1];
6589                         loadmodel->brushq3.lightgridtexturesize[2] = texturesize[2];
6590                         memset(lightgridmatrix[0], 0, sizeof(lightgridmatrix));
6591                         lightgridmatrix[0][0] = loadmodel->brushq3.num_lightgrid_scale[0] / texturesize[0];
6592                         lightgridmatrix[1][1] = loadmodel->brushq3.num_lightgrid_scale[1] / texturesize[1];
6593                         lightgridmatrix[2][2] = loadmodel->brushq3.num_lightgrid_scale[2] / texturesize[2];
6594                         lightgridmatrix[0][3] = -(loadmodel->brushq3.num_lightgrid_imins[0] - 0.5f) / texturesize[0];
6595                         lightgridmatrix[1][3] = -(loadmodel->brushq3.num_lightgrid_imins[1] - 0.5f) / texturesize[1];
6596                         lightgridmatrix[2][3] = -(loadmodel->brushq3.num_lightgrid_imins[2] - 1.5f) / texturesize[2];
6597                         lightgridmatrix[3][3] = 1;
6598                         Matrix4x4_FromArrayDoubleD3D(&loadmodel->brushq3.lightgridworldtotexturematrix, lightgridmatrix);
6599                         loadmodel->brushq3.lightgridtexture = R_LoadTexture3D(loadmodel->texturepool, "lightgrid", texturesize[0], texturesize[1], texturesize[2], texturergba, TEXTYPE_RGBA, TEXF_CLAMP, 0, NULL);
6600                         Mem_Free(texturergba);
6601                 }
6602         }
6603 }
6604
6605 static void Mod_Q3BSP_LoadPVS(lump_t *l)
6606 {
6607         q3dpvs_t *in;
6608         int totalchains;
6609
6610         if (l->filelen == 0)
6611         {
6612                 int i;
6613                 // unvised maps often have cluster indices even without pvs, so check
6614                 // leafs to find real number of clusters
6615                 loadmodel->brush.num_pvsclusters = 1;
6616                 for (i = 0;i < loadmodel->brush.num_leafs;i++)
6617                         loadmodel->brush.num_pvsclusters = max(loadmodel->brush.num_pvsclusters, loadmodel->brush.data_leafs[i].clusterindex + 1);
6618
6619                 // create clusters
6620                 loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters + 7) / 8;
6621                 totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6622                 loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6623                 memset(loadmodel->brush.data_pvsclusters, 0xFF, totalchains);
6624                 return;
6625         }
6626
6627         in = (q3dpvs_t *)(mod_base + l->fileofs);
6628         if (l->filelen < 9)
6629                 Host_Error("Mod_Q3BSP_LoadPVS: funny lump size in %s",loadmodel->name);
6630
6631         loadmodel->brush.num_pvsclusters = LittleLong(in->numclusters);
6632         loadmodel->brush.num_pvsclusterbytes = LittleLong(in->chainlength);
6633         if (loadmodel->brush.num_pvsclusterbytes < ((loadmodel->brush.num_pvsclusters + 7) / 8))
6634                 Host_Error("Mod_Q3BSP_LoadPVS: (chainlength = %i) < ((numclusters = %i) + 7) / 8", loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.num_pvsclusters);
6635         totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6636         if (l->filelen < totalchains + (int)sizeof(*in))
6637                 Host_Error("Mod_Q3BSP_LoadPVS: lump too small ((numclusters = %i) * (chainlength = %i) + sizeof(q3dpvs_t) == %i bytes, lump is %i bytes)", loadmodel->brush.num_pvsclusters, loadmodel->brush.num_pvsclusterbytes, (int)(totalchains + sizeof(*in)), l->filelen);
6638
6639         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6640         memcpy(loadmodel->brush.data_pvsclusters, (unsigned char *)(in + 1), totalchains);
6641 }
6642
6643 static void Mod_Q3BSP_LightPoint(model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
6644 {
6645         int i, j, k, index[3];
6646         float transformed[3], blend1, blend2, blend, stylescale = 1;
6647         q3dlightgrid_t *a, *s;
6648
6649         // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
6650         // LadyHavoc: FIXME: is this true?
6651         stylescale = 1; // added while render
6652         //stylescale = r_refdef.scene.rtlightstylevalue[0];
6653
6654         if (!model->brushq3.num_lightgrid)
6655         {
6656                 ambientcolor[0] = stylescale;
6657                 ambientcolor[1] = stylescale;
6658                 ambientcolor[2] = stylescale;
6659                 return;
6660         }
6661
6662         Matrix4x4_Transform(&model->brushq3.num_lightgrid_indexfromworld, p, transformed);
6663         //Matrix4x4_Print(&model->brushq3.num_lightgrid_indexfromworld);
6664         //Con_Printf("%f %f %f transformed %f %f %f clamped ", p[0], p[1], p[2], transformed[0], transformed[1], transformed[2]);
6665         transformed[0] = bound(0, transformed[0], model->brushq3.num_lightgrid_isize[0] - 1);
6666         transformed[1] = bound(0, transformed[1], model->brushq3.num_lightgrid_isize[1] - 1);
6667         transformed[2] = bound(0, transformed[2], model->brushq3.num_lightgrid_isize[2] - 1);
6668         index[0] = (int)floor(transformed[0]);
6669         index[1] = (int)floor(transformed[1]);
6670         index[2] = (int)floor(transformed[2]);
6671         //Con_Printf("%f %f %f index %i %i %i:\n", transformed[0], transformed[1], transformed[2], index[0], index[1], index[2]);
6672
6673         // now lerp the values
6674         VectorClear(diffusenormal);
6675         a = &model->brushq3.data_lightgrid[(index[2] * model->brushq3.num_lightgrid_isize[1] + index[1]) * model->brushq3.num_lightgrid_isize[0] + index[0]];
6676         for (k = 0;k < 2;k++)
6677         {
6678                 blend1 = (k ? (transformed[2] - index[2]) : (1 - (transformed[2] - index[2])));
6679                 if (blend1 < 0.001f || index[2] + k >= model->brushq3.num_lightgrid_isize[2])
6680                         continue;
6681                 for (j = 0;j < 2;j++)
6682                 {
6683                         blend2 = blend1 * (j ? (transformed[1] - index[1]) : (1 - (transformed[1] - index[1])));
6684                         if (blend2 < 0.001f || index[1] + j >= model->brushq3.num_lightgrid_isize[1])
6685                                 continue;
6686                         for (i = 0;i < 2;i++)
6687                         {
6688                                 blend = blend2 * (i ? (transformed[0] - index[0]) : (1 - (transformed[0] - index[0]))) * stylescale;
6689                                 if (blend < 0.001f || index[0] + i >= model->brushq3.num_lightgrid_isize[0])
6690                                         continue;
6691                                 s = a + (k * model->brushq3.num_lightgrid_isize[1] + j) * model->brushq3.num_lightgrid_isize[0] + i;
6692                                 VectorMA(ambientcolor, blend * (1.0f / 128.0f), s->ambientrgb, ambientcolor);
6693                                 VectorMA(diffusecolor, blend * (1.0f / 128.0f), s->diffusergb, diffusecolor);
6694                                 // this uses the mod_md3_sin table because the values are
6695                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6696                                 // instead of a sine value
6697                                 diffusenormal[0] += blend * (mod_md3_sin[64 + s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6698                                 diffusenormal[1] += blend * (mod_md3_sin[     s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6699                                 diffusenormal[2] += blend * (mod_md3_sin[64 + s->diffusepitch]);
6700                                 //Con_Printf("blend %f: ambient %i %i %i, diffuse %i %i %i, diffusepitch %i diffuseyaw %i (%f %f, normal %f %f %f)\n", blend, s->ambientrgb[0], s->ambientrgb[1], s->ambientrgb[2], s->diffusergb[0], s->diffusergb[1], s->diffusergb[2], s->diffusepitch, s->diffuseyaw, pitch, yaw, (cos(yaw) * cospitch), (sin(yaw) * cospitch), (-sin(pitch)));
6701                         }
6702                 }
6703         }
6704
6705         // normalize the light direction before turning
6706         VectorNormalize(diffusenormal);
6707         //Con_Printf("result: ambient %f %f %f diffuse %f %f %f diffusenormal %f %f %f\n", ambientcolor[0], ambientcolor[1], ambientcolor[2], diffusecolor[0], diffusecolor[1], diffusecolor[2], diffusenormal[0], diffusenormal[1], diffusenormal[2]);
6708 }
6709
6710 static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3], double endpos[3])
6711 {
6712         double t1, t2;
6713         double midf, mid[3];
6714         int ret, side;
6715
6716         // check for empty
6717         while (node->plane)
6718         {
6719                 // find the point distances
6720                 mplane_t *plane = node->plane;
6721                 if (plane->type < 3)
6722                 {
6723                         t1 = p1[plane->type] - plane->dist;
6724                         t2 = p2[plane->type] - plane->dist;
6725                 }
6726                 else
6727                 {
6728                         t1 = DotProduct (plane->normal, p1) - plane->dist;
6729                         t2 = DotProduct (plane->normal, p2) - plane->dist;
6730                 }
6731
6732                 if (t1 < 0)
6733                 {
6734                         if (t2 < 0)
6735                         {
6736                                 node = node->children[1];
6737                                 continue;
6738                         }
6739                         side = 1;
6740                 }
6741                 else
6742                 {
6743                         if (t2 >= 0)
6744                         {
6745                                 node = node->children[0];
6746                                 continue;
6747                         }
6748                         side = 0;
6749                 }
6750
6751                 midf = t1 / (t1 - t2);
6752                 VectorLerp(p1, midf, p2, mid);
6753
6754                 // recurse both sides, front side first
6755                 // return 2 if empty is followed by solid (hit something)
6756                 // do not return 2 if both are solid or both empty,
6757                 // or if start is solid and end is empty
6758                 // as these degenerate cases usually indicate the eye is in solid and
6759                 // should see the target point anyway
6760                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid, endpos);
6761                 if (ret != 0)
6762                         return ret;
6763                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2, endpos);
6764                 if (ret != 1)
6765                         return ret;
6766                 VectorCopy(mid, endpos);
6767                 return 2;
6768         }
6769         return ((mleaf_t *)node)->clusterindex < 0;
6770 }
6771
6772 static qbool Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
6773 {
6774         if (model->brush.submodel || mod_q3bsp_tracelineofsight_brushes.integer)
6775         {
6776                 trace_t trace;
6777                 model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
6778                 return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
6779         }
6780         else
6781         {
6782                 double tracestart[3], traceend[3], traceendpos[3];
6783                 VectorCopy(start, tracestart);
6784                 VectorCopy(end, traceend);
6785                 VectorCopy(end, traceendpos);
6786                 Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend, traceendpos);
6787                 return BoxesOverlap(traceendpos, traceendpos, acceptmins, acceptmaxs);
6788         }
6789 }
6790
6791 void Mod_CollisionBIH_TracePoint(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
6792 {
6793         const bih_t *bih;
6794         const bih_leaf_t *leaf;
6795         const bih_node_t *node;
6796         const colbrushf_t *brush;
6797         int axis;
6798         int nodenum;
6799         int nodestackpos = 0;
6800         int nodestack[1024];
6801
6802         memset(trace, 0, sizeof(*trace));
6803         trace->fraction = 1;
6804         trace->hitsupercontentsmask = hitsupercontentsmask;
6805         trace->skipsupercontentsmask = skipsupercontentsmask;
6806         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6807
6808         bih = &model->collision_bih;
6809         if(!bih->nodes)
6810                 return;
6811
6812         nodenum = bih->rootnode;
6813         nodestack[nodestackpos++] = nodenum;
6814         while (nodestackpos)
6815         {
6816                 nodenum = nodestack[--nodestackpos];
6817                 node = bih->nodes + nodenum;
6818 #if 1
6819                 if (!BoxesOverlap(start, start, node->mins, node->maxs))
6820                         continue;
6821 #endif
6822                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6823                 {
6824                         axis = node->type - BIH_SPLITX;
6825                         if (start[axis] >= node->frontmin)
6826                                 nodestack[nodestackpos++] = node->front;
6827                         if (start[axis] <= node->backmax)
6828                                 nodestack[nodestackpos++] = node->back;
6829                 }
6830                 else if (node->type == BIH_UNORDERED)
6831                 {
6832                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6833                         {
6834                                 leaf = bih->leafs + node->children[axis];
6835 #if 1
6836                                 if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
6837                                         continue;
6838 #endif
6839                                 switch(leaf->type)
6840                                 {
6841                                 case BIH_BRUSH:
6842                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6843                                         Collision_TracePointBrushFloat(trace, start, brush);
6844                                         break;
6845                                 case BIH_COLLISIONTRIANGLE:
6846                                         // collision triangle - skipped because they have no volume
6847                                         break;
6848                                 case BIH_RENDERTRIANGLE:
6849                                         // render triangle - skipped because they have no volume
6850                                         break;
6851                                 }
6852                         }
6853                 }
6854         }
6855 }
6856
6857 static void Mod_CollisionBIH_TraceLineShared(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, const bih_t *bih)
6858 {
6859         const bih_leaf_t *leaf;
6860         const bih_node_t *node;
6861         const colbrushf_t *brush;
6862         const int *e;
6863         const texture_t *texture;
6864         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6865         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6866         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6867
6868         if(!bih->nodes)
6869                 return;
6870
6871         if (VectorCompare(start, end))
6872         {
6873                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6874                 return;
6875         }
6876
6877         nodenum = bih->rootnode;
6878
6879         memset(trace, 0, sizeof(*trace));
6880         trace->fraction = 1;
6881         trace->hitsupercontentsmask = hitsupercontentsmask;
6882         trace->skipsupercontentsmask = skipsupercontentsmask;
6883         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6884
6885         // push first node
6886         nodestackline[nodestackpos][0] = start[0];
6887         nodestackline[nodestackpos][1] = start[1];
6888         nodestackline[nodestackpos][2] = start[2];
6889         nodestackline[nodestackpos][3] = end[0];
6890         nodestackline[nodestackpos][4] = end[1];
6891         nodestackline[nodestackpos][5] = end[2];
6892         nodestack[nodestackpos++] = nodenum;
6893         while (nodestackpos)
6894         {
6895                 nodenum = nodestack[--nodestackpos];
6896                 node = bih->nodes + nodenum;
6897                 VectorCopy(nodestackline[nodestackpos], nodestart);
6898                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
6899                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6900                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6901                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6902                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6903                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6904                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6905                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs) && !collision_bih_fullrecursion.integer)
6906                         continue;
6907                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6908                 {
6909                         // recurse children of the split
6910                         axis = node->type - BIH_SPLITX;
6911                         d1 = node->backmax - nodestart[axis];
6912                         d2 = node->backmax - nodeend[axis];
6913                         d3 = nodestart[axis] - node->frontmin;
6914                         d4 = nodeend[axis] - node->frontmin;
6915                         if (collision_bih_fullrecursion.integer)
6916                                 d1 = d2 = d3 = d4 = 1; // force full recursion
6917                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
6918                         {
6919                         case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6920                         case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6921                         case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6922                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6923                         case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6924                         case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6925                         case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6926                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6927                         case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6928                         case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6929                         case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6930                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6931                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6932                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6933                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6934                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
6935                         }
6936                 }
6937                 else if (node->type == BIH_UNORDERED)
6938                 {
6939                         // calculate sweep bounds for this node
6940                         // copy node bounds into local variables
6941                         VectorCopy(node->mins, nodebigmins);
6942                         VectorCopy(node->maxs, nodebigmaxs);
6943                         // clip line to this node bounds
6944                         axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6945                         axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6946                         axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
6947                         // some of the line intersected the enlarged node box
6948                         // calculate sweep bounds for this node
6949                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6950                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6951                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6952                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6953                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6954                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6955                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6956                         {
6957                                 leaf = bih->leafs + node->children[axis];
6958                                 // TODO: This is very expensive in Steel Storm. Framerate halved during even light combat.
6959                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
6960                                         continue;
6961                                 switch(leaf->type)
6962                                 {
6963                                 case BIH_BRUSH:
6964                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6965                                         Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
6966                                         break;
6967                                 case BIH_COLLISIONTRIANGLE:
6968                                         if (!mod_q3bsp_curves_collisions.integer)
6969                                                 continue;
6970                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
6971                                         texture = model->data_textures + leaf->textureindex;
6972                                         Collision_TraceLineTriangleFloat(trace, start, end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
6973                                         break;
6974                                 case BIH_RENDERTRIANGLE:
6975                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
6976                                         texture = model->data_textures + leaf->textureindex;
6977                                         Collision_TraceLineTriangleFloat(trace, start, end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
6978                                         break;
6979                                 }
6980                         }
6981                 }
6982         }
6983 }
6984
6985 void Mod_CollisionBIH_TraceLine(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
6986 {
6987         if (VectorCompare(start, end))
6988         {
6989                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6990                 return;
6991         }
6992         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->collision_bih);
6993 }
6994
6995 void Mod_CollisionBIH_TraceBrush(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *thisbrush_start, colbrushf_t *thisbrush_end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
6996 {
6997         const bih_t *bih;
6998         const bih_leaf_t *leaf;
6999         const bih_node_t *node;
7000         const colbrushf_t *brush;
7001         const int *e;
7002         const texture_t *texture;
7003         vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
7004         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
7005         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
7006         int axis, nodenum, nodestackpos = 0, nodestack[1024];
7007
7008         if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
7009         {
7010                 if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
7011                         Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7012                 else
7013                         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7014                 return;
7015         }
7016
7017         bih = &model->collision_bih;
7018         if(!bih->nodes)
7019                 return;
7020         nodenum = bih->rootnode;
7021
7022         // box trace, performed as brush trace
7023         memset(trace, 0, sizeof(*trace));
7024         trace->fraction = 1;
7025         trace->hitsupercontentsmask = hitsupercontentsmask;
7026         trace->skipsupercontentsmask = skipsupercontentsmask;
7027         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7028
7029         // calculate tracebox-like parameters for efficient culling
7030         VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
7031         VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
7032         VectorSubtract(thisbrush_start->mins, start, startmins);
7033         VectorSubtract(thisbrush_start->maxs, start, startmaxs);
7034         VectorSubtract(thisbrush_end->mins, end, endmins);
7035         VectorSubtract(thisbrush_end->maxs, end, endmaxs);
7036         mins[0] = min(startmins[0], endmins[0]);
7037         mins[1] = min(startmins[1], endmins[1]);
7038         mins[2] = min(startmins[2], endmins[2]);
7039         maxs[0] = max(startmaxs[0], endmaxs[0]);
7040         maxs[1] = max(startmaxs[1], endmaxs[1]);
7041         maxs[2] = max(startmaxs[2], endmaxs[2]);
7042
7043         // push first node
7044         nodestackline[nodestackpos][0] = start[0];
7045         nodestackline[nodestackpos][1] = start[1];
7046         nodestackline[nodestackpos][2] = start[2];
7047         nodestackline[nodestackpos][3] = end[0];
7048         nodestackline[nodestackpos][4] = end[1];
7049         nodestackline[nodestackpos][5] = end[2];
7050         nodestack[nodestackpos++] = nodenum;
7051         while (nodestackpos)
7052         {
7053                 nodenum = nodestack[--nodestackpos];
7054                 node = bih->nodes + nodenum;
7055                 VectorCopy(nodestackline[nodestackpos], nodestart);
7056                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
7057                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7058                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7059                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7060                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7061                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7062                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7063                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
7064                         continue;
7065                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
7066                 {
7067                         // recurse children of the split
7068                         axis = node->type - BIH_SPLITX;
7069                         d1 = node->backmax - nodestart[axis] - mins[axis];
7070                         d2 = node->backmax - nodeend[axis] - mins[axis];
7071                         d3 = nodestart[axis] - node->frontmin + maxs[axis];
7072                         d4 = nodeend[axis] - node->frontmin + maxs[axis];
7073                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
7074                         {
7075                         case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7076                         case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7077                         case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7078                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7079                         case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7080                         case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7081                         case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7082                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7083                         case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7084                         case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7085                         case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7086                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7087                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7088                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7089                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7090                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
7091                         }
7092                 }
7093                 else if (node->type == BIH_UNORDERED)
7094                 {
7095                         // calculate sweep bounds for this node
7096                         // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
7097                         VectorSubtract(node->mins, maxs, nodebigmins);
7098                         VectorSubtract(node->maxs, mins, nodebigmaxs);
7099                         // clip line to this node bounds
7100                         axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7101                         axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7102                         axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
7103                         // some of the line intersected the enlarged node box
7104                         // calculate sweep bounds for this node
7105                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7106                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7107                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7108                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7109                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7110                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7111                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
7112                         {
7113                                 leaf = bih->leafs + node->children[axis];
7114                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
7115                                         continue;
7116                                 switch(leaf->type)
7117                                 {
7118                                 case BIH_BRUSH:
7119                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
7120                                         Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
7121                                         break;
7122                                 case BIH_COLLISIONTRIANGLE:
7123                                         if (!mod_q3bsp_curves_collisions.integer)
7124                                                 continue;
7125                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
7126                                         texture = model->data_textures + leaf->textureindex;
7127                                         Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
7128                                         break;
7129                                 case BIH_RENDERTRIANGLE:
7130                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
7131                                         texture = model->data_textures + leaf->textureindex;
7132                                         Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
7133                                         break;
7134                                 }
7135                         }
7136                 }
7137         }
7138 }
7139
7140 void Mod_CollisionBIH_TraceBox(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
7141 {
7142         colboxbrushf_t thisbrush_start, thisbrush_end;
7143         vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
7144
7145         // box trace, performed as brush trace
7146         VectorAdd(start, boxmins, boxstartmins);
7147         VectorAdd(start, boxmaxs, boxstartmaxs);
7148         VectorAdd(end, boxmins, boxendmins);
7149         VectorAdd(end, boxmaxs, boxendmaxs);
7150         Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
7151         Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
7152         Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7153 }
7154
7155
7156 int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
7157 {
7158         trace_t trace;
7159         Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0, 0, 0);
7160         return trace.startsupercontents;
7161 }
7162
7163 qbool Mod_CollisionBIH_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
7164 {
7165         trace_t trace;
7166         Mod_CollisionBIH_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
7167         return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
7168 }
7169
7170 void Mod_CollisionBIH_TracePoint_Mesh(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
7171 {
7172 #if 0
7173         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7174         vec3_t end;
7175         int hitsupercontents;
7176         VectorSet(end, start[0], start[1], model->normalmins[2]);
7177 #endif
7178         memset(trace, 0, sizeof(*trace));
7179         trace->fraction = 1;
7180         trace->hitsupercontentsmask = hitsupercontentsmask;
7181         trace->skipsupercontentsmask = skipsupercontentsmask;
7182         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7183 #if 0
7184         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7185         hitsupercontents = trace->hitsupercontents;
7186         memset(trace, 0, sizeof(*trace));
7187         trace->fraction = 1;
7188         trace->hitsupercontentsmask = hitsupercontentsmask;
7189         trace->skipsupercontentsmask = skipsupercontentsmask;
7190         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7191         trace->startsupercontents = hitsupercontents;
7192 #endif
7193 }
7194
7195 int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, const vec3_t start)
7196 {
7197 #if 0
7198         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7199         trace_t trace;
7200         vec3_t end;
7201         VectorSet(end, start[0], start[1], model->normalmins[2]);
7202         memset(&trace, 0, sizeof(trace));
7203         trace.fraction = 1;
7204         trace.hitsupercontentsmask = hitsupercontentsmask;
7205         trace.skipsupercontentsmask = skipsupercontentsmask;
7206         trace.skipmaterialflagsmask = skipmaterialflagsmask;
7207         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7208         return trace.hitsupercontents;
7209 #else
7210         return 0;
7211 #endif
7212 }
7213
7214 void Mod_CollisionBIH_TraceLineAgainstSurfaces(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
7215 {
7216         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->render_bih);
7217 }
7218
7219
7220 bih_t *Mod_MakeCollisionBIH(model_t *model, qbool userendersurfaces, bih_t *out)
7221 {
7222         int j;
7223         int bihnumleafs;
7224         int bihmaxnodes;
7225         int brushindex;
7226         int triangleindex;
7227         int bihleafindex;
7228         int nummodelbrushes = model->nummodelbrushes;
7229         const int *e;
7230         const int *collisionelement3i;
7231         const float *collisionvertex3f;
7232         const int *renderelement3i;
7233         const float *rendervertex3f;
7234         bih_leaf_t *bihleafs;
7235         bih_node_t *bihnodes;
7236         int *temp_leafsort;
7237         int *temp_leafsortscratch;
7238         const msurface_t *surface;
7239         const q3mbrush_t *brush;
7240
7241         // find out how many BIH leaf nodes we need
7242         bihnumleafs = 0;
7243         if (userendersurfaces)
7244         {
7245                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7246                         bihnumleafs += model->data_surfaces[j].num_triangles;
7247         }
7248         else
7249         {
7250                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7251                         if (brush->colbrushf)
7252                                 bihnumleafs++;
7253                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7254                 {
7255                         if (model->data_surfaces[j].texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
7256                                 bihnumleafs += model->data_surfaces[j].num_triangles + model->data_surfaces[j].num_collisiontriangles;
7257                         else
7258                                 bihnumleafs += model->data_surfaces[j].num_collisiontriangles;
7259                 }
7260         }
7261
7262         if (!bihnumleafs)
7263                 return NULL;
7264
7265         // allocate the memory for the BIH leaf nodes
7266         bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
7267
7268         // now populate the BIH leaf nodes
7269         bihleafindex = 0;
7270
7271         // add render surfaces
7272         renderelement3i = model->surfmesh.data_element3i;
7273         rendervertex3f = model->surfmesh.data_vertex3f;
7274         for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7275         {
7276                 surface = model->data_surfaces + j;
7277                 for (triangleindex = 0, e = renderelement3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
7278                 {
7279                         if (!userendersurfaces && !(surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS))
7280                                 continue;
7281                         bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
7282                         bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7283                         bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7284                         bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
7285                         bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
7286                         bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
7287                         bihleafs[bihleafindex].mins[2] = min(rendervertex3f[3*e[0]+2], min(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) - 1;
7288                         bihleafs[bihleafindex].maxs[0] = max(rendervertex3f[3*e[0]+0], max(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) + 1;
7289                         bihleafs[bihleafindex].maxs[1] = max(rendervertex3f[3*e[0]+1], max(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) + 1;
7290                         bihleafs[bihleafindex].maxs[2] = max(rendervertex3f[3*e[0]+2], max(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) + 1;
7291                         bihleafindex++;
7292                 }
7293         }
7294
7295         if (!userendersurfaces)
7296         {
7297                 // add collision brushes
7298                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7299                 {
7300                         if (!brush->colbrushf)
7301                                 continue;
7302                         bihleafs[bihleafindex].type = BIH_BRUSH;
7303                         bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
7304                         bihleafs[bihleafindex].surfaceindex = -1;
7305                         bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
7306                         VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
7307                         VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
7308                         bihleafindex++;
7309                 }
7310
7311                 // add collision surfaces
7312                 collisionelement3i = model->brush.data_collisionelement3i;
7313                 collisionvertex3f = model->brush.data_collisionvertex3f;
7314                 for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7315                 {
7316                         surface = model->data_surfaces + j;
7317                         for (triangleindex = 0, e = collisionelement3i + 3*surface->num_firstcollisiontriangle;triangleindex < surface->num_collisiontriangles;triangleindex++, e += 3)
7318                         {
7319                                 bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
7320                                 bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7321                                 bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7322                                 bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
7323                                 bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
7324                                 bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
7325                                 bihleafs[bihleafindex].mins[2] = min(collisionvertex3f[3*e[0]+2], min(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) - 1;
7326                                 bihleafs[bihleafindex].maxs[0] = max(collisionvertex3f[3*e[0]+0], max(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) + 1;
7327                                 bihleafs[bihleafindex].maxs[1] = max(collisionvertex3f[3*e[0]+1], max(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) + 1;
7328                                 bihleafs[bihleafindex].maxs[2] = max(collisionvertex3f[3*e[0]+2], max(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) + 1;
7329                                 bihleafindex++;
7330                         }
7331                 }
7332         }
7333
7334         // allocate buffers for the produced and temporary data
7335         bihmaxnodes = bihnumleafs + 1;
7336         bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
7337         temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
7338         temp_leafsortscratch = temp_leafsort + bihnumleafs;
7339
7340         // now build it
7341         BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
7342
7343         // we're done with the temporary data
7344         Mem_Free(temp_leafsort);
7345
7346         // resize the BIH nodes array if it over-allocated
7347         if (out->maxnodes > out->numnodes)
7348         {
7349                 out->maxnodes = out->numnodes;
7350                 out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
7351         }
7352
7353         return out;
7354 }
7355
7356 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents)
7357 {
7358         int supercontents = 0;
7359         if (nativecontents & CONTENTSQ3_SOLID)
7360                 supercontents |= SUPERCONTENTS_SOLID;
7361         if (nativecontents & CONTENTSQ3_WATER)
7362                 supercontents |= SUPERCONTENTS_WATER;
7363         if (nativecontents & CONTENTSQ3_SLIME)
7364                 supercontents |= SUPERCONTENTS_SLIME;
7365         if (nativecontents & CONTENTSQ3_LAVA)
7366                 supercontents |= SUPERCONTENTS_LAVA;
7367         if (nativecontents & CONTENTSQ3_BODY)
7368                 supercontents |= SUPERCONTENTS_BODY;
7369         if (nativecontents & CONTENTSQ3_CORPSE)
7370                 supercontents |= SUPERCONTENTS_CORPSE;
7371         if (nativecontents & CONTENTSQ3_NODROP)
7372                 supercontents |= SUPERCONTENTS_NODROP;
7373         if (nativecontents & CONTENTSQ3_PLAYERCLIP)
7374                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
7375         if (nativecontents & CONTENTSQ3_MONSTERCLIP)
7376                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
7377         if (nativecontents & CONTENTSQ3_DONOTENTER)
7378                 supercontents |= SUPERCONTENTS_DONOTENTER;
7379         if (nativecontents & CONTENTSQ3_BOTCLIP)
7380                 supercontents |= SUPERCONTENTS_BOTCLIP;
7381         if (!(nativecontents & CONTENTSQ3_TRANSLUCENT))
7382                 supercontents |= SUPERCONTENTS_OPAQUE;
7383         return supercontents;
7384 }
7385
7386 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents)
7387 {
7388         int nativecontents = 0;
7389         if (supercontents & SUPERCONTENTS_SOLID)
7390                 nativecontents |= CONTENTSQ3_SOLID;
7391         if (supercontents & SUPERCONTENTS_WATER)
7392                 nativecontents |= CONTENTSQ3_WATER;
7393         if (supercontents & SUPERCONTENTS_SLIME)
7394                 nativecontents |= CONTENTSQ3_SLIME;
7395         if (supercontents & SUPERCONTENTS_LAVA)
7396                 nativecontents |= CONTENTSQ3_LAVA;
7397         if (supercontents & SUPERCONTENTS_BODY)
7398                 nativecontents |= CONTENTSQ3_BODY;
7399         if (supercontents & SUPERCONTENTS_CORPSE)
7400                 nativecontents |= CONTENTSQ3_CORPSE;
7401         if (supercontents & SUPERCONTENTS_NODROP)
7402                 nativecontents |= CONTENTSQ3_NODROP;
7403         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
7404                 nativecontents |= CONTENTSQ3_PLAYERCLIP;
7405         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
7406                 nativecontents |= CONTENTSQ3_MONSTERCLIP;
7407         if (supercontents & SUPERCONTENTS_DONOTENTER)
7408                 nativecontents |= CONTENTSQ3_DONOTENTER;
7409         if (supercontents & SUPERCONTENTS_BOTCLIP)
7410                 nativecontents |= CONTENTSQ3_BOTCLIP;
7411         if (!(supercontents & SUPERCONTENTS_OPAQUE))
7412                 nativecontents |= CONTENTSQ3_TRANSLUCENT;
7413         return nativecontents;
7414 }
7415
7416 static void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
7417 {
7418         int numleafs;
7419         while (node->plane)
7420         {
7421                 Mod_Q3BSP_RecursiveFindNumLeafs(node->children[0]);
7422                 node = node->children[1];
7423         }
7424         numleafs = ((mleaf_t *)node - loadmodel->brush.data_leafs) + 1;
7425         if (loadmodel->brush.num_leafs < numleafs)
7426                 loadmodel->brush.num_leafs = numleafs;
7427 }
7428
7429 static void Mod_Q3BSP_Load(model_t *mod, void *buffer, void *bufferend)
7430 {
7431         int i, j, lumps;
7432         q3dheader_t *header;
7433         float corner[3], yawradius, modelradius;
7434
7435         mod->modeldatatypestring = "Q3BSP";
7436
7437         mod->type = mod_brushq3;
7438         mod->brush.ishlbsp = false;
7439         mod->brush.isbsp2rmqe = false;
7440         mod->brush.isbsp2 = false;
7441         mod->brush.isq2bsp = false;
7442         mod->brush.isq3bsp = true;
7443         mod->brush.skymasking = true;
7444         mod->numframes = 2; // although alternate textures are not supported it is annoying to complain about no such frame 1
7445         mod->numskins = 1;
7446
7447         header = (q3dheader_t *)buffer;
7448         if((char *) bufferend < (char *) buffer + sizeof(q3dheader_t))
7449                 Host_Error("Mod_Q3BSP_Load: %s is smaller than its header", mod->name);
7450
7451         i = LittleLong(header->version);
7452         if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG && i != Q3BSPVERSION_LIVE)
7453                 Host_Error("Mod_Q3BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q3BSPVERSION);
7454
7455         mod->soundfromcenter = true;
7456         mod->TraceBox = Mod_CollisionBIH_TraceBox;
7457         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
7458         mod->TraceLine = Mod_CollisionBIH_TraceLine;
7459         mod->TracePoint = Mod_CollisionBIH_TracePoint;
7460         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
7461         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
7462         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
7463         mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
7464         mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
7465         mod->brush.GetPVS = Mod_BSP_GetPVS;
7466         mod->brush.FatPVS = Mod_BSP_FatPVS;
7467         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
7468         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
7469         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
7470         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
7471         mod->brush.LightPoint = Mod_Q3BSP_LightPoint;
7472         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
7473         mod->brush.AmbientSoundLevelsForPoint = NULL;
7474         mod->brush.RoundUpToHullSize = NULL;
7475         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
7476         mod->Draw = R_Mod_Draw;
7477         mod->DrawDepth = R_Mod_DrawDepth;
7478         mod->DrawDebug = R_Mod_DrawDebug;
7479         mod->DrawPrepass = R_Mod_DrawPrepass;
7480         mod->GetLightInfo = R_Mod_GetLightInfo;
7481         mod->CompileShadowMap = R_Mod_CompileShadowMap;
7482         mod->DrawShadowMap = R_Mod_DrawShadowMap;
7483         mod->DrawLight = R_Mod_DrawLight;
7484
7485         mod_base = (unsigned char *)header;
7486
7487         // swap all the lumps
7488         header->ident = LittleLong(header->ident);
7489         header->version = LittleLong(header->version);
7490         lumps = (header->version == Q3BSPVERSION_LIVE) ? Q3HEADER_LUMPS_LIVE : Q3HEADER_LUMPS;
7491         for (i = 0;i < lumps;i++)
7492         {
7493                 j = (header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs));
7494                 if((char *) bufferend < (char *) buffer + j)
7495                         Host_Error("Mod_Q3BSP_Load: %s has a lump that starts outside the file!", mod->name);
7496                 j += (header->lumps[i].filelen = LittleLong(header->lumps[i].filelen));
7497                 if((char *) bufferend < (char *) buffer + j)
7498                         Host_Error("Mod_Q3BSP_Load: %s has a lump that ends outside the file!", mod->name);
7499         }
7500         /*
7501          * NO, do NOT clear them!
7502          * they contain actual data referenced by other stuff.
7503          * Instead, before using the advertisements lump, check header->versio
7504          * again!
7505          * Sorry, but otherwise it breaks memory of the first lump.
7506         for (i = lumps;i < Q3HEADER_LUMPS_MAX;i++)
7507         {
7508                 header->lumps[i].fileofs = 0;
7509                 header->lumps[i].filelen = 0;
7510         }
7511         */
7512
7513         mod->brush.qw_md4sum = 0;
7514         mod->brush.qw_md4sum2 = 0;
7515         for (i = 0;i < lumps;i++)
7516         {
7517                 if (i == Q3LUMP_ENTITIES)
7518                         continue;
7519                 mod->brush.qw_md4sum ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7520                 if (i == Q3LUMP_PVS || i == Q3LUMP_LEAFS || i == Q3LUMP_NODES)
7521                         continue;
7522                 mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7523
7524                 // all this checksumming can take a while, so let's send keepalives here too
7525                 CL_KeepaliveMessage(false);
7526         }
7527
7528         // allocate a texture pool if we need it
7529         if (mod->texturepool == NULL)
7530                 mod->texturepool = R_AllocTexturePool();
7531
7532         Mod_Q3BSP_LoadEntities(&header->lumps[Q3LUMP_ENTITIES]);
7533         Mod_Q3BSP_LoadTextures(&header->lumps[Q3LUMP_TEXTURES]);
7534         Mod_Q3BSP_LoadPlanes(&header->lumps[Q3LUMP_PLANES]);
7535         if (header->version == Q3BSPVERSION_IG)
7536                 Mod_Q3BSP_LoadBrushSides_IG(&header->lumps[Q3LUMP_BRUSHSIDES]);
7537         else
7538                 Mod_Q3BSP_LoadBrushSides(&header->lumps[Q3LUMP_BRUSHSIDES]);
7539         Mod_Q3BSP_LoadBrushes(&header->lumps[Q3LUMP_BRUSHES]);
7540         Mod_Q3BSP_LoadEffects(&header->lumps[Q3LUMP_EFFECTS]);
7541         Mod_Q3BSP_LoadVertices(&header->lumps[Q3LUMP_VERTICES]);
7542         Mod_Q3BSP_LoadTriangles(&header->lumps[Q3LUMP_TRIANGLES]);
7543         Mod_Q3BSP_LoadLightmaps(&header->lumps[Q3LUMP_LIGHTMAPS], &header->lumps[Q3LUMP_FACES]);
7544         Mod_Q3BSP_LoadFaces(&header->lumps[Q3LUMP_FACES]);
7545         Mod_Q3BSP_LoadModels(&header->lumps[Q3LUMP_MODELS]);
7546         Mod_Q3BSP_LoadLeafBrushes(&header->lumps[Q3LUMP_LEAFBRUSHES]);
7547         Mod_Q3BSP_LoadLeafFaces(&header->lumps[Q3LUMP_LEAFFACES]);
7548         Mod_Q3BSP_LoadLeafs(&header->lumps[Q3LUMP_LEAFS]);
7549         Mod_Q3BSP_LoadNodes(&header->lumps[Q3LUMP_NODES]);
7550         Mod_Q3BSP_LoadLightGrid(&header->lumps[Q3LUMP_LIGHTGRID]);
7551         Mod_Q3BSP_LoadPVS(&header->lumps[Q3LUMP_PVS]);
7552         loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
7553
7554         // the MakePortals code works fine on the q3bsp data as well
7555         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
7556                 Mod_BSP_MakePortals();
7557
7558         // FIXME: shader alpha should replace r_wateralpha support in q3bsp
7559         loadmodel->brush.supportwateralpha = true;
7560
7561         loadmodel->brush.num_leafs = 0;
7562         Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
7563
7564         if (loadmodel->brush.numsubmodels)
7565                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
7566
7567         mod = loadmodel;
7568         mod->modelsurfaces_sorted = (int*)Mem_Alloc(loadmodel->mempool, mod->num_surfaces * sizeof(*mod->modelsurfaces_sorted));
7569         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
7570         {
7571                 if (i > 0)
7572                 {
7573                         char name[10];
7574                         // duplicate the basic information
7575                         dpsnprintf(name, sizeof(name), "*%i", i);
7576                         mod = Mod_FindName(name, loadmodel->name);
7577                         // copy the base model to this one
7578                         *mod = *loadmodel;
7579                         // rename the clone back to its proper name
7580                         dp_strlcpy(mod->name, name, sizeof(mod->name));
7581                         mod->brush.parentmodel = loadmodel;
7582                         // textures and memory belong to the main model
7583                         mod->texturepool = NULL;
7584                         mod->mempool = NULL;
7585                         mod->brush.GetPVS = NULL;
7586                         mod->brush.FatPVS = NULL;
7587                         mod->brush.BoxTouchingPVS = NULL;
7588                         mod->brush.BoxTouchingLeafPVS = NULL;
7589                         mod->brush.BoxTouchingVisibleLeafs = NULL;
7590                         mod->brush.FindBoxClusters = NULL;
7591                         mod->brush.LightPoint = NULL;
7592                         mod->brush.AmbientSoundLevelsForPoint = NULL;
7593                 }
7594                 mod->brush.submodel = i;
7595                 if (loadmodel->brush.submodels)
7596                         loadmodel->brush.submodels[i] = mod;
7597
7598                 // make the model surface list (used by shadowing/lighting)
7599                 mod->submodelsurfaces_start = mod->brushq3.data_models[i].firstface;
7600                 mod->submodelsurfaces_end = mod->brushq3.data_models[i].firstface + mod->brushq3.data_models[i].numfaces;
7601                 mod->firstmodelbrush = mod->brushq3.data_models[i].firstbrush;
7602                 mod->nummodelbrushes = mod->brushq3.data_models[i].numbrushes;
7603
7604                 VectorCopy(mod->brushq3.data_models[i].mins, mod->normalmins);
7605                 VectorCopy(mod->brushq3.data_models[i].maxs, mod->normalmaxs);
7606                 // enlarge the bounding box to enclose all geometry of this model,
7607                 // because q3map2 sometimes lies (mostly to affect the lightgrid),
7608                 // which can in turn mess up the farclip (as well as culling when
7609                 // outside the level - an unimportant concern)
7610
7611                 //printf("Editing model %d... BEFORE re-bounding: %f %f %f - %f %f %f\n", i, mod->normalmins[0], mod->normalmins[1], mod->normalmins[2], mod->normalmaxs[0], mod->normalmaxs[1], mod->normalmaxs[2]);
7612                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
7613                 {
7614                         const msurface_t *surface = mod->data_surfaces + j;
7615                         const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
7616                         int k;
7617                         if (!surface->num_vertices)
7618                                 continue;
7619                         for (k = 0;k < surface->num_vertices;k++, v += 3)
7620                         {
7621                                 mod->normalmins[0] = min(mod->normalmins[0], v[0]);
7622                                 mod->normalmins[1] = min(mod->normalmins[1], v[1]);
7623                                 mod->normalmins[2] = min(mod->normalmins[2], v[2]);
7624                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
7625                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
7626                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
7627                         }
7628                 }
7629                 //printf("Editing model %d... AFTER re-bounding: %f %f %f - %f %f %f\n", i, mod->normalmins[0], mod->normalmins[1], mod->normalmins[2], mod->normalmaxs[0], mod->normalmaxs[1], mod->normalmaxs[2]);
7630                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
7631                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
7632                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
7633                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
7634                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
7635                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
7636                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
7637                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
7638                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
7639                 mod->yawmins[2] = mod->normalmins[2];
7640                 mod->yawmaxs[2] = mod->normalmaxs[2];
7641                 mod->radius = modelradius;
7642                 mod->radius2 = modelradius * modelradius;
7643
7644                 Mod_SetDrawSkyAndWater(mod);
7645                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
7646                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
7647
7648                 // generate VBOs and other shared data before cloning submodels
7649                 if (i == 0)
7650                         Mod_BuildVBOs();
7651         }
7652         mod = loadmodel;
7653
7654         // make the model surface list (used by shadowing/lighting)
7655         Mod_MakeSortedSurfaces(loadmodel);
7656
7657         if (mod_q3bsp_sRGBlightmaps.integer)
7658         {
7659                 if (vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
7660                 {
7661                         // actually we do in sRGB fallback with sRGB lightmaps: Image_sRGBFloatFromLinear_Lightmap(Image_LinearFloatFromsRGBFloat(x))
7662                         // neutral point is at Image_sRGBFloatFromLinearFloat(0.5)
7663                         // so we need to map Image_sRGBFloatFromLinearFloat(0.5) to 0.5
7664                         // factor is 0.5 / Image_sRGBFloatFromLinearFloat(0.5)
7665                         //loadmodel->lightmapscale *= 0.679942f; // fixes neutral level
7666                 }
7667                 else // if this is NOT set, regular rendering looks right by this requirement anyway
7668                 {
7669                         /*
7670                         // we want color 1 to do the same as without sRGB
7671                         // so, we want to map 1 to Image_LinearFloatFromsRGBFloat(2) instead of to 2
7672                         loadmodel->lightmapscale *= 2.476923f; // fixes max level
7673                         */
7674
7675                         // neutral level 0.5 gets uploaded as sRGB and becomes Image_LinearFloatFromsRGBFloat(0.5)
7676                         // we need to undo that
7677                         loadmodel->lightmapscale *= 2.336f; // fixes neutral level
7678                 }
7679         }
7680
7681         Con_DPrintf("Stats for q3bsp model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
7682 }
7683
7684 void Mod_IBSP_Load(model_t *mod, void *buffer, void *bufferend)
7685 {
7686         int i = LittleLong(((int *)buffer)[1]);
7687         if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG || i == Q3BSPVERSION_LIVE)
7688                 Mod_Q3BSP_Load(mod,buffer, bufferend);
7689         else if (i == Q2BSPVERSION)
7690                 Mod_Q2BSP_Load(mod,buffer, bufferend);
7691         else
7692                 Host_Error("Mod_IBSP_Load: unknown/unsupported version %i", i);
7693 }
7694
7695 static void Mod_VBSP_LoadEntities(sizebuf_t *sb)
7696 {
7697         loadmodel->brush.entities = NULL;
7698         if (!sb->cursize)
7699                 return;
7700         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
7701         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
7702         loadmodel->brush.entities[sb->cursize] = 0;
7703 }
7704
7705 static void Mod_VBSP_LoadVertexes(sizebuf_t *sb)
7706 {
7707         mvertex_t       *out;
7708         int                     i, count;
7709         int                     structsize = 12;
7710
7711         if (sb->cursize % structsize)
7712                 Host_Error("Mod_VBSP_LoadVertexes: funny lump size in %s",loadmodel->name);
7713         count = sb->cursize / structsize;
7714         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
7715
7716         loadmodel->brushq1.vertexes = out;
7717         loadmodel->brushq1.numvertexes = count;
7718
7719         for ( i=0 ; i<count ; i++, out++)
7720         {
7721                 out->position[0] = MSG_ReadLittleFloat(sb);
7722                 out->position[1] = MSG_ReadLittleFloat(sb);
7723                 out->position[2] = MSG_ReadLittleFloat(sb);
7724         }
7725 }
7726
7727 static void Mod_VBSP_LoadEdges(sizebuf_t *sb)
7728 {
7729         medge_t *out;
7730         int     i, count;
7731         int             structsize = 4;
7732
7733         if (sb->cursize % structsize)
7734                 Host_Error("Mod_VBSP_LoadEdges: funny lump size in %s",loadmodel->name);
7735         count = sb->cursize / structsize;
7736         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7737
7738         loadmodel->brushq1.edges = out;
7739         loadmodel->brushq1.numedges = count;
7740
7741         for ( i=0 ; i<count ; i++, out++)
7742         {
7743                 out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
7744                 out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
7745
7746                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
7747                 {
7748                         Con_Printf("Mod_VBSP_LoadEdges: %s has invalid vertex indices in edge %i (vertices %i %i >= numvertices %i)\n", loadmodel->name, i, out->v[0], out->v[1], loadmodel->brushq1.numvertexes);
7749                         if(!loadmodel->brushq1.numvertexes)
7750                                 Host_Error("Mod_VBSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
7751
7752                         out->v[0] = 0;
7753                         out->v[1] = 0;
7754                 }
7755         }
7756 }
7757
7758 static void Mod_VBSP_LoadSurfedges(sizebuf_t *sb)
7759 {
7760         int             i;
7761         int structsize = 4;
7762
7763         if (sb->cursize % structsize)
7764                 Host_Error("Mod_VBSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
7765         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
7766         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
7767
7768         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
7769                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
7770 }
7771
7772 static void Mod_VBSP_LoadTextures(sizebuf_t *sb)
7773 {
7774         Con_Printf(CON_WARN "Mod_VBSP_LoadTextures: Don't know how to do this yet\n");
7775 }
7776
7777 static void Mod_VBSP_LoadPlanes(sizebuf_t *sb)
7778 {
7779         int                     i;
7780         mplane_t        *out;
7781         int structsize = 20;
7782
7783         if (sb->cursize % structsize)
7784                 Host_Error("Mod_VBSP_LoadPlanes: funny lump size in %s", loadmodel->name);
7785         loadmodel->brush.num_planes = sb->cursize / structsize;
7786         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
7787
7788         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
7789         {
7790                 out->normal[0] = MSG_ReadLittleFloat(sb);
7791                 out->normal[1] = MSG_ReadLittleFloat(sb);
7792                 out->normal[2] = MSG_ReadLittleFloat(sb);
7793                 out->dist = MSG_ReadLittleFloat(sb);
7794                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
7795                 PlaneClassify(out);
7796         }
7797 }
7798
7799 static void Mod_VBSP_LoadTexinfo(sizebuf_t *sb)
7800 {
7801         mtexinfo_t *out;
7802         int i, j, k, count, miptex;
7803         int structsize = 72;
7804
7805         if (sb->cursize % structsize)
7806                 Host_Error("Mod_VBSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
7807         count = sb->cursize / structsize;
7808         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7809
7810         loadmodel->brushq1.texinfo = out;
7811         loadmodel->brushq1.numtexinfo = count;
7812
7813         for (i = 0;i < count;i++, out++)
7814         {
7815                 for (k = 0;k < 2;k++)
7816                         for (j = 0;j < 4;j++)
7817                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
7818
7819                 for (k = 0;k < 2;k++)
7820                         for (j = 0;j < 4;j++)
7821                                 MSG_ReadLittleFloat(sb); // TODO lightmapVecs
7822
7823                 out->q1flags = MSG_ReadLittleLong(sb);
7824                 miptex = MSG_ReadLittleLong(sb);
7825
7826                 if (out->q1flags & TEX_SPECIAL)
7827                 {
7828                         // if texture chosen is NULL or the shader needs a lightmap,
7829                         // force to notexture water shader
7830                         out->textureindex = loadmodel->num_textures - 1;
7831                 }
7832                 else
7833                 {
7834                         // if texture chosen is NULL, force to notexture
7835                         out->textureindex = loadmodel->num_textures - 2;
7836                 }
7837                 // see if the specified miptex is valid and try to use it instead
7838                 if (loadmodel->data_textures)
7839                 {
7840                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
7841                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
7842                         else
7843                                 out->textureindex = miptex;
7844                 }
7845         }
7846 }
7847
7848 static void Mod_VBSP_LoadFaces(sizebuf_t *sb)
7849 {
7850         msurface_t *surface;
7851         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
7852         float texmins[2], texmaxs[2], val;
7853         rtexture_t *lightmaptexture, *deluxemaptexture;
7854         char vabuf[1024];
7855         int structsize =  56;
7856
7857         if (sb->cursize % structsize)
7858                 Host_Error("Mod_VBSP_LoadFaces: funny lump size in %s",loadmodel->name);
7859         count = sb->cursize / structsize;
7860         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
7861         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
7862
7863         loadmodel->num_surfaces = count;
7864
7865         loadmodel->brushq1.firstrender = true;
7866         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
7867
7868         totalverts = 0;
7869         totaltris = 0;
7870         for (surfacenum = 0;surfacenum < count;surfacenum++)
7871         {
7872                 numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
7873                 totalverts += numedges;
7874                 totaltris += numedges - 2;
7875         }
7876
7877         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false);
7878
7879         lightmaptexture = NULL;
7880         deluxemaptexture = r_texture_blanknormalmap;
7881         lightmapnumber = 0;
7882         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
7883         totallightmapsamples = 0;
7884
7885         totalverts = 0;
7886         totaltris = 0;
7887         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
7888         {
7889                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
7890                 planenum = (unsigned short)MSG_ReadLittleShort(sb);
7891                 /*side = */MSG_ReadLittleShort(sb); // TODO support onNode?
7892                 firstedge = MSG_ReadLittleLong(sb);
7893                 numedges = (unsigned short)MSG_ReadLittleShort(sb);
7894                 texinfoindex = (unsigned short)MSG_ReadLittleShort(sb);
7895                 MSG_ReadLittleLong(sb); // skipping over dispinfo and surfaceFogVolumeID, both short
7896                 for (i = 0;i < MAXLIGHTMAPS;i++)
7897                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
7898                 lightmapoffset = MSG_ReadLittleLong(sb);
7899
7900                 // FIXME: validate edges, texinfo, etc?
7901                 if ((unsigned int) firstedge > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) firstedge + (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges)
7902                         Host_Error("Mod_VBSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
7903                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
7904                         Host_Error("Mod_VBSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
7905                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
7906                         Host_Error("Mod_VBSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
7907
7908                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
7909                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
7910
7911                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
7912                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
7913                         lightmapoffset = -1;
7914
7915                 //surface->flags = surface->texture->flags;
7916                 //if (LittleShort(in->side))
7917                 //      surface->flags |= SURF_PLANEBACK;
7918                 //surface->plane = loadmodel->brush.data_planes + planenum;
7919
7920                 surface->num_firstvertex = totalverts;
7921                 surface->num_vertices = numedges;
7922                 surface->num_firsttriangle = totaltris;
7923                 surface->num_triangles = numedges - 2;
7924                 totalverts += numedges;
7925                 totaltris += numedges - 2;
7926
7927                 // convert edges back to a normal polygon
7928                 for (i = 0;i < surface->num_vertices;i++)
7929                 {
7930                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
7931                         float s, t;
7932                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
7933                         if (lindex >= 0)
7934                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7935                         else
7936                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7937                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7938                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7939                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
7940                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
7941                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
7942                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
7943                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
7944                 }
7945
7946                 for (i = 0;i < surface->num_triangles;i++)
7947                 {
7948                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
7949                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
7950                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
7951                 }
7952
7953                 // compile additional data about the surface geometry
7954                 Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
7955                 Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
7956                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
7957
7958                 // generate surface extents information
7959                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7960                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7961                 for (i = 1;i < surface->num_vertices;i++)
7962                 {
7963                         for (j = 0;j < 2;j++)
7964                         {
7965                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
7966                                 texmins[j] = min(texmins[j], val);
7967                                 texmaxs[j] = max(texmaxs[j], val);
7968                         }
7969                 }
7970                 for (i = 0;i < 2;i++)
7971                 {
7972                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
7973                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
7974                 }
7975
7976                 smax = surface->lightmapinfo->extents[0] >> 4;
7977                 tmax = surface->lightmapinfo->extents[1] >> 4;
7978                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
7979                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
7980
7981                 // lighting info
7982                 surface->lightmaptexture = NULL;
7983                 surface->deluxemaptexture = r_texture_blanknormalmap;
7984                 if (lightmapoffset == -1)
7985                 {
7986                         surface->lightmapinfo->samples = NULL;
7987 #if 1
7988                         // give non-lightmapped water a 1x white lightmap
7989                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
7990                         {
7991                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
7992                                 surface->lightmapinfo->styles[0] = 0;
7993                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
7994                         }
7995 #endif
7996                 }
7997                 else
7998                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
7999
8000                 // check if we should apply a lightmap to this
8001                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
8002                 {
8003                         if (ssize > 256 || tsize > 256)
8004                                 Host_Error("Bad surface extents");
8005
8006                         if (lightmapsize < ssize)
8007                                 lightmapsize = ssize;
8008                         if (lightmapsize < tsize)
8009                                 lightmapsize = tsize;
8010
8011                         totallightmapsamples += ssize*tsize;
8012
8013                         // force lightmap upload on first time seeing the surface
8014                         //
8015                         // additionally this is used by the later code to see if a
8016                         // lightmap is needed on this surface (rather than duplicating the
8017                         // logic above)
8018                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
8019                         loadmodel->lit = true;
8020                 }
8021         }
8022
8023         // small maps (such as ammo boxes especially) don't need big lightmap
8024         // textures, so this code tries to guess a good size based on
8025         // totallightmapsamples (size of the lightmaps lump basically), as well as
8026         // trying to max out the size if there is a lot of lightmap data to store
8027         // additionally, never choose a lightmapsize that is smaller than the
8028         // largest surface encountered (as it would fail)
8029         i = lightmapsize;
8030         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
8031                 ;
8032
8033         // now that we've decided the lightmap texture size, we can do the rest
8034         if (cls.state != ca_dedicated)
8035         {
8036                 int stainmapsize = 0;
8037                 mod_alloclightmap_state_t allocState;
8038
8039                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
8040                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8041                 {
8042                         int iu, iv, lightmapx = 0, lightmapy = 0;
8043                         float u, v, ubase, vbase, uscale, vscale;
8044
8045                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8046                                 continue;
8047
8048                         smax = surface->lightmapinfo->extents[0] >> 4;
8049                         tmax = surface->lightmapinfo->extents[1] >> 4;
8050                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8051                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8052                         stainmapsize += ssize * tsize * 3;
8053
8054                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
8055                         {
8056                                 // allocate a texture pool if we need it
8057                                 if (loadmodel->texturepool == NULL)
8058                                         loadmodel->texturepool = R_AllocTexturePool();
8059                                 // could not find room, make a new lightmap
8060                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
8061                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
8062                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
8063                                 loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
8064                                 if (loadmodel->brushq1.nmaplightdata)
8065                                         loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
8066                                 lightmapnumber++;
8067                                 Mod_AllocLightmap_Reset(&allocState);
8068                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
8069                         }
8070                         surface->lightmaptexture = lightmaptexture;
8071                         surface->deluxemaptexture = deluxemaptexture;
8072                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
8073                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
8074
8075                         uscale = 1.0f / (float)lightmapsize;
8076                         vscale = 1.0f / (float)lightmapsize;
8077                         ubase = lightmapx * uscale;
8078                         vbase = lightmapy * vscale;
8079
8080                         for (i = 0;i < surface->num_vertices;i++)
8081                         {
8082                                 u = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3]) + 8 - surface->lightmapinfo->texturemins[0]) * (1.0 / 16.0);
8083                                 v = ((DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3]) + 8 - surface->lightmapinfo->texturemins[1]) * (1.0 / 16.0);
8084                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
8085                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
8086                                 // LadyHavoc: calc lightmap data offset for vertex lighting to use
8087                                 iu = (int) u;
8088                                 iv = (int) v;
8089                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
8090                         }
8091                 }
8092
8093                 if (cl_stainmaps.integer)
8094                 {
8095                         // allocate stainmaps for permanent marks on walls and clear white
8096                         unsigned char *stainsamples = NULL;
8097                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
8098                         memset(stainsamples, 255, stainmapsize);
8099                         // assign pointers
8100                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8101                         {
8102                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8103                                         continue;
8104                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8105                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8106                                 surface->lightmapinfo->stainsamples = stainsamples;
8107                                 stainsamples += ssize * tsize * 3;
8108                         }
8109                 }
8110         }
8111
8112         // generate ushort elements array if possible
8113         if (loadmodel->surfmesh.data_element3s)
8114                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8115                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8116 }
8117
8118 // Valve BSP loader
8119 // Cloudwalk: Wasn't sober when I wrote this. I screamed and ran away at the face loader
8120 void Mod_VBSP_Load(model_t *mod, void *buffer, void *bufferend)
8121 {
8122         static cvar_t *testing = NULL; // TEMPORARY
8123         int i;
8124         sizebuf_t sb;
8125         sizebuf_t lumpsb[HL2HEADER_LUMPS];
8126
8127         if(!testing || !testing->integer)
8128         {
8129                 if(!testing)
8130                         testing = Cvar_Get(&cvars_all, "mod_bsp_vbsptest", "0", CF_CLIENT | CF_SERVER, "uhhh");
8131                 Host_Error("Mod_VBSP_Load: not yet fully implemented. Change the now-generated \"mod_bsp_vbsptest\" to 1 if you wish to test this");
8132         }
8133         else
8134         {
8135
8136                 MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
8137
8138                 mod->type = mod_brushhl2;
8139
8140                 MSG_ReadLittleLong(&sb);
8141                 MSG_ReadLittleLong(&sb); // TODO version check
8142
8143                 mod->modeldatatypestring = "VBSP";
8144
8145                 // read lumps
8146                 for (i = 0; i < HL2HEADER_LUMPS; i++)
8147                 {
8148                         int offset = MSG_ReadLittleLong(&sb);
8149                         int size = MSG_ReadLittleLong(&sb);
8150                         MSG_ReadLittleLong(&sb); // TODO support version
8151                         MSG_ReadLittleLong(&sb); // TODO support ident
8152                         if (offset < 0 || offset + size > sb.cursize)
8153                                 Host_Error("Mod_VBSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
8154                         MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
8155                 }
8156
8157                 MSG_ReadLittleLong(&sb); // TODO support revision field
8158
8159                 mod->soundfromcenter = true;
8160                 mod->TraceBox = Mod_CollisionBIH_TraceBox;
8161                 mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
8162                 mod->TraceLine = Mod_CollisionBIH_TraceLine;
8163                 mod->TracePoint = Mod_CollisionBIH_TracePoint;
8164                 mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
8165                 mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8166                 mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight; // probably not correct
8167                 mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents; // probably not correct
8168                 mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents; // probably not correct
8169                 mod->brush.GetPVS = Mod_BSP_GetPVS;
8170                 mod->brush.FatPVS = Mod_BSP_FatPVS;
8171                 mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
8172                 mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
8173                 mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
8174                 mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
8175                 mod->brush.LightPoint = Mod_Q3BSP_LightPoint; // probably not correct
8176                 mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
8177                 mod->brush.AmbientSoundLevelsForPoint = NULL;
8178                 mod->brush.RoundUpToHullSize = NULL;
8179                 mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
8180                 mod->Draw = R_Mod_Draw;
8181                 mod->DrawDepth = R_Mod_DrawDepth;
8182                 mod->DrawDebug = R_Mod_DrawDebug;
8183                 mod->DrawPrepass = R_Mod_DrawPrepass;
8184                 mod->GetLightInfo = R_Mod_GetLightInfo;
8185                 mod->CompileShadowMap = R_Mod_CompileShadowMap;
8186                 mod->DrawShadowMap = R_Mod_DrawShadowMap;
8187                 mod->DrawLight = R_Mod_DrawLight;
8188
8189                 // allocate a texture pool if we need it
8190                 if (mod->texturepool == NULL)
8191                         mod->texturepool = R_AllocTexturePool();
8192
8193                 Mod_VBSP_LoadEntities(&lumpsb[HL2LUMP_ENTITIES]);
8194                 Mod_VBSP_LoadVertexes(&lumpsb[HL2LUMP_VERTEXES]);
8195                 Mod_VBSP_LoadEdges(&lumpsb[HL2LUMP_EDGES]);
8196                 Mod_VBSP_LoadSurfedges(&lumpsb[HL2LUMP_SURFEDGES]);
8197                 Mod_VBSP_LoadTextures(&lumpsb[HL2LUMP_TEXDATA/*?*/]);
8198                 //Mod_VBSP_LoadLighting(&lumpsb[HL2LUMP_LIGHTING]);
8199                 Mod_VBSP_LoadPlanes(&lumpsb[HL2LUMP_PLANES]);
8200                 Mod_VBSP_LoadTexinfo(&lumpsb[HL2LUMP_TEXINFO]);
8201
8202                 // AHHHHHHH
8203                 Mod_VBSP_LoadFaces(&lumpsb[HL2LUMP_FACES]);
8204         }
8205 }
8206
8207 void Mod_MAP_Load(model_t *mod, void *buffer, void *bufferend)
8208 {
8209         Host_Error("Mod_MAP_Load: not yet implemented");
8210 }
8211
8212 typedef struct objvertex_s
8213 {
8214         int nextindex;
8215         int submodelindex;
8216         int textureindex;
8217         float v[3];
8218         float vt[2];
8219         float vn[3];
8220 }
8221 objvertex_t;
8222
8223 static unsigned char nobsp_pvs[1] = {1};
8224
8225 void Mod_OBJ_Load(model_t *mod, void *buffer, void *bufferend)
8226 {
8227         const char *textbase = (char *)buffer, *text = textbase;
8228         char *s;
8229         char *argv[512];
8230         char line[1024];
8231         char materialname[MAX_QPATH];
8232         int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
8233         int index1, index2, index3;
8234         objvertex_t vfirst, vprev, vcurrent;
8235         int argc;
8236         int linelen;
8237         int numtriangles = 0;
8238         int maxtriangles = 0;
8239         objvertex_t *vertices = NULL;
8240         int linenumber = 0;
8241         int maxtextures = 0, numtextures = 0, textureindex = 0;
8242         int maxv = 0, numv = 1;
8243         int maxvt = 0, numvt = 1;
8244         int maxvn = 0, numvn = 1;
8245         char *texturenames = NULL;
8246         float dist, modelradius, modelyawradius, yawradius;
8247         float *obj_v = NULL;
8248         float *obj_vt = NULL;
8249         float *obj_vn = NULL;
8250         float mins[3];
8251         float maxs[3];
8252         float corner[3];
8253         objvertex_t *thisvertex = NULL;
8254         int vertexhashindex;
8255         int *vertexhashtable = NULL;
8256         objvertex_t *vertexhashdata = NULL;
8257         objvertex_t *vdata = NULL;
8258         int vertexhashsize = 0;
8259         int vertexhashcount = 0;
8260         skinfile_t *skinfiles = NULL;
8261         unsigned char *data = NULL;
8262         int *submodelfirstsurface;
8263         msurface_t *tempsurface;
8264         msurface_t *tempsurfaces;
8265
8266         memset(&vfirst, 0, sizeof(vfirst));
8267         memset(&vprev, 0, sizeof(vprev));
8268         memset(&vcurrent, 0, sizeof(vcurrent));
8269
8270         dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
8271
8272         loadmodel->modeldatatypestring = "OBJ";
8273
8274         loadmodel->type = mod_obj;
8275         loadmodel->soundfromcenter = true;
8276         loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
8277         loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
8278         loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
8279         loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
8280         loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8281         loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
8282         loadmodel->brush.TraceLineOfSight = NULL;
8283         loadmodel->brush.SuperContentsFromNativeContents = NULL;
8284         loadmodel->brush.NativeContentsFromSuperContents = NULL;
8285         loadmodel->brush.GetPVS = NULL;
8286         loadmodel->brush.FatPVS = NULL;
8287         loadmodel->brush.BoxTouchingPVS = NULL;
8288         loadmodel->brush.BoxTouchingLeafPVS = NULL;
8289         loadmodel->brush.BoxTouchingVisibleLeafs = NULL;
8290         loadmodel->brush.FindBoxClusters = NULL;
8291         loadmodel->brush.LightPoint = NULL;
8292         loadmodel->brush.FindNonSolidLocation = NULL;
8293         loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
8294         loadmodel->brush.RoundUpToHullSize = NULL;
8295         loadmodel->brush.PointInLeaf = NULL;
8296         loadmodel->Draw = R_Mod_Draw;
8297         loadmodel->DrawDepth = R_Mod_DrawDepth;
8298         loadmodel->DrawDebug = R_Mod_DrawDebug;
8299         loadmodel->DrawPrepass = R_Mod_DrawPrepass;
8300         loadmodel->GetLightInfo = R_Mod_GetLightInfo;
8301         loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
8302         loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
8303         loadmodel->DrawLight = R_Mod_DrawLight;
8304
8305         skinfiles = Mod_LoadSkinFiles();
8306         if (loadmodel->numskins < 1)
8307                 loadmodel->numskins = 1;
8308
8309         // make skinscenes for the skins (no groups)
8310         loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
8311         for (i = 0;i < loadmodel->numskins;i++)
8312         {
8313                 loadmodel->skinscenes[i].firstframe = i;
8314                 loadmodel->skinscenes[i].framecount = 1;
8315                 loadmodel->skinscenes[i].loop = true;
8316                 loadmodel->skinscenes[i].framerate = 10;
8317         }
8318
8319         VectorClear(mins);
8320         VectorClear(maxs);
8321
8322         // we always have model 0, i.e. the first "submodel"
8323         loadmodel->brush.numsubmodels = 1;
8324
8325         // parse the OBJ text now
8326         for(;;)
8327         {
8328                 static char emptyarg[1] = "";
8329                 if (!*text)
8330                         break;
8331                 linenumber++;
8332                 linelen = 0;
8333                 for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
8334                         line[linelen] = text[linelen];
8335                 line[linelen] = 0;
8336                 for (argc = 0;argc < 4;argc++)
8337                         argv[argc] = emptyarg;
8338                 argc = 0;
8339                 s = line;
8340                 while (*s == ' ' || *s == '\t')
8341                         s++;
8342                 while (*s)
8343                 {
8344                         argv[argc++] = s;
8345                         while (*s > ' ')
8346                                 s++;
8347                         if (!*s)
8348                                 break;
8349                         *s++ = 0;
8350                         while (*s == ' ' || *s == '\t')
8351                                 s++;
8352                 }
8353                 text += linelen;
8354                 if (*text == '\r')
8355                         text++;
8356                 if (*text == '\n')
8357                         text++;
8358                 if (!argc)
8359                         continue;
8360                 if (argv[0][0] == '#')
8361                         continue;
8362                 if (!strcmp(argv[0], "v"))
8363                 {
8364                         if (maxv <= numv)
8365                         {
8366                                 maxv = max(maxv * 2, 1024);
8367                                 obj_v = (float *)Mem_Realloc(tempmempool, obj_v, maxv * sizeof(float[3]));
8368                         }
8369                         if(mod_obj_orientation.integer)
8370                         {
8371                                 obj_v[numv*3+0] = atof(argv[1]);
8372                                 obj_v[numv*3+2] = atof(argv[2]);
8373                                 obj_v[numv*3+1] = atof(argv[3]);
8374                         }
8375                         else
8376                         {
8377                                 obj_v[numv*3+0] = atof(argv[1]);
8378                                 obj_v[numv*3+1] = atof(argv[2]);
8379                                 obj_v[numv*3+2] = atof(argv[3]);
8380                         }
8381                         numv++;
8382                 }
8383                 else if (!strcmp(argv[0], "vt"))
8384                 {
8385                         if (maxvt <= numvt)
8386                         {
8387                                 maxvt = max(maxvt * 2, 1024);
8388                                 obj_vt = (float *)Mem_Realloc(tempmempool, obj_vt, maxvt * sizeof(float[2]));
8389                         }
8390                         obj_vt[numvt*2+0] = atof(argv[1]);
8391                         obj_vt[numvt*2+1] = 1-atof(argv[2]);
8392                         numvt++;
8393                 }
8394                 else if (!strcmp(argv[0], "vn"))
8395                 {
8396                         if (maxvn <= numvn)
8397                         {
8398                                 maxvn = max(maxvn * 2, 1024);
8399                                 obj_vn = (float *)Mem_Realloc(tempmempool, obj_vn, maxvn * sizeof(float[3]));
8400                         }
8401                         if(mod_obj_orientation.integer)
8402                         {
8403                                 obj_vn[numvn*3+0] = atof(argv[1]);
8404                                 obj_vn[numvn*3+2] = atof(argv[2]);
8405                                 obj_vn[numvn*3+1] = atof(argv[3]);
8406                         }
8407                         else
8408                         {
8409                                 obj_vn[numvn*3+0] = atof(argv[1]);
8410                                 obj_vn[numvn*3+1] = atof(argv[2]);
8411                                 obj_vn[numvn*3+2] = atof(argv[3]);
8412                         }
8413                         numvn++;
8414                 }
8415                 else if (!strcmp(argv[0], "f"))
8416                 {
8417                         if (!numtextures)
8418                         {
8419                                 if (maxtextures <= numtextures)
8420                                 {
8421                                         maxtextures = max(maxtextures * 2, 256);
8422                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8423                                 }
8424                                 textureindex = numtextures++;
8425                                 dp_strlcpy(texturenames + textureindex*MAX_QPATH, loadmodel->name, MAX_QPATH);
8426                         }
8427                         for (j = 1;j < argc;j++)
8428                         {
8429                                 index1 = atoi(argv[j]);
8430                                 while(argv[j][0] && argv[j][0] != '/')
8431                                         argv[j]++;
8432                                 if (argv[j][0])
8433                                         argv[j]++;
8434                                 index2 = atoi(argv[j]);
8435                                 while(argv[j][0] && argv[j][0] != '/')
8436                                         argv[j]++;
8437                                 if (argv[j][0])
8438                                         argv[j]++;
8439                                 index3 = atoi(argv[j]);
8440                                 // negative refers to a recent vertex
8441                                 // zero means not specified
8442                                 // positive means an absolute vertex index
8443                                 if (index1 < 0)
8444                                         index1 = numv - index1;
8445                                 if (index2 < 0)
8446                                         index2 = numvt - index2;
8447                                 if (index3 < 0)
8448                                         index3 = numvn - index3;
8449                                 vcurrent.nextindex = -1;
8450                                 vcurrent.textureindex = textureindex;
8451                                 vcurrent.submodelindex = submodelindex;
8452                                 if (obj_v && index1 >= 0 && index1 < numv)
8453                                         VectorCopy(obj_v + 3*index1, vcurrent.v);
8454                                 if (obj_vt && index2 >= 0 && index2 < numvt)
8455                                         Vector2Copy(obj_vt + 2*index2, vcurrent.vt);
8456                                 if (obj_vn && index3 >= 0 && index3 < numvn)
8457                                         VectorCopy(obj_vn + 3*index3, vcurrent.vn);
8458                                 if (numtriangles == 0)
8459                                 {
8460                                         VectorCopy(vcurrent.v, mins);
8461                                         VectorCopy(vcurrent.v, maxs);
8462                                 }
8463                                 else
8464                                 {
8465                                         mins[0] = min(mins[0], vcurrent.v[0]);
8466                                         mins[1] = min(mins[1], vcurrent.v[1]);
8467                                         mins[2] = min(mins[2], vcurrent.v[2]);
8468                                         maxs[0] = max(maxs[0], vcurrent.v[0]);
8469                                         maxs[1] = max(maxs[1], vcurrent.v[1]);
8470                                         maxs[2] = max(maxs[2], vcurrent.v[2]);
8471                                 }
8472                                 if (j == 1)
8473                                         vfirst = vcurrent;
8474                                 else if (j >= 3)
8475                                 {
8476                                         if (maxtriangles <= numtriangles)
8477                                         {
8478                                                 maxtriangles = max(maxtriangles * 2, 32768);
8479                                                 vertices = (objvertex_t*)Mem_Realloc(loadmodel->mempool, vertices, maxtriangles * sizeof(objvertex_t[3]));
8480                                         }
8481                                         if(mod_obj_orientation.integer)
8482                                         {
8483                                                 vertices[numtriangles*3+0] = vfirst;
8484                                                 vertices[numtriangles*3+1] = vprev;
8485                                                 vertices[numtriangles*3+2] = vcurrent;
8486                                         }
8487                                         else
8488                                         {
8489                                                 vertices[numtriangles*3+0] = vfirst;
8490                                                 vertices[numtriangles*3+2] = vprev;
8491                                                 vertices[numtriangles*3+1] = vcurrent;
8492                                         }
8493                                         numtriangles++;
8494                                 }
8495                                 vprev = vcurrent;
8496                         }
8497                 }
8498                 else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
8499                 {
8500                         submodelindex = atof(argv[1]);
8501                         loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
8502                 }
8503                 else if (!strcmp(argv[0], "usemtl"))
8504                 {
8505                         for (i = 0;i < numtextures;i++)
8506                                 if (!strcmp(texturenames+i*MAX_QPATH, argv[1]))
8507                                         break;
8508                         if (i < numtextures)
8509                                 textureindex = i;
8510                         else
8511                         {
8512                                 if (maxtextures <= numtextures)
8513                                 {
8514                                         maxtextures = max(maxtextures * 2, 256);
8515                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8516                                 }
8517                                 textureindex = numtextures++;
8518                                 dp_strlcpy(texturenames + textureindex*MAX_QPATH, argv[1], MAX_QPATH);
8519                         }
8520                 }
8521         }
8522
8523         // now that we have the OBJ data loaded as-is, we can convert it
8524
8525         // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
8526         VectorCopy(mins, loadmodel->normalmins);
8527         VectorCopy(maxs, loadmodel->normalmaxs);
8528         dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
8529         modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
8530         modelyawradius = dist*dist+modelyawradius*modelyawradius;
8531         modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
8532         modelradius = modelyawradius + modelradius * modelradius;
8533         modelyawradius = sqrt(modelyawradius);
8534         modelradius = sqrt(modelradius);
8535         loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
8536         loadmodel->yawmins[2] = loadmodel->normalmins[2];
8537         loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
8538         loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
8539         loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
8540         loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
8541         loadmodel->radius = modelradius;
8542         loadmodel->radius2 = modelradius * modelradius;
8543
8544         // allocate storage for triangles
8545         loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
8546         // allocate vertex hash structures to build an optimal vertex subset
8547         vertexhashsize = numtriangles*2;
8548         vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
8549         memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
8550         vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
8551         vertexhashcount = 0;
8552
8553         // gather surface stats for assigning vertex/triangle ranges
8554         firstvertex = 0;
8555         firsttriangle = 0;
8556         elementindex = 0;
8557         loadmodel->num_surfaces = 0;
8558         // allocate storage for the worst case number of surfaces, later we resize
8559         tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
8560         submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
8561         tempsurface = tempsurfaces;
8562         for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
8563         {
8564                 submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8565                 for (textureindex = 0;textureindex < numtextures;textureindex++)
8566                 {
8567                         for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
8568                         {
8569                                 thisvertex = vertices + vertexindex;
8570                                 if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
8571                                         break;
8572                         }
8573                         // skip the surface creation if there are no triangles for it
8574                         if (vertexindex == numtriangles*3)
8575                                 continue;
8576                         // create a surface for these vertices
8577                         surfacevertices = 0;
8578                         surfaceelements = 0;
8579                         // we hack in a texture index in the surface to be fixed up later...
8580                         tempsurface->texture = (texture_t *)((size_t)textureindex);
8581                         // calculate bounds as we go
8582                         VectorCopy(thisvertex->v, tempsurface->mins);
8583                         VectorCopy(thisvertex->v, tempsurface->maxs);
8584                         for (;vertexindex < numtriangles*3;vertexindex++)
8585                         {
8586                                 thisvertex = vertices + vertexindex;
8587                                 if (thisvertex->submodelindex != submodelindex)
8588                                         continue;
8589                                 if (thisvertex->textureindex != textureindex)
8590                                         continue;
8591                                 // add vertex to surface bounds
8592                                 tempsurface->mins[0] = min(tempsurface->mins[0], thisvertex->v[0]);
8593                                 tempsurface->mins[1] = min(tempsurface->mins[1], thisvertex->v[1]);
8594                                 tempsurface->mins[2] = min(tempsurface->mins[2], thisvertex->v[2]);
8595                                 tempsurface->maxs[0] = max(tempsurface->maxs[0], thisvertex->v[0]);
8596                                 tempsurface->maxs[1] = max(tempsurface->maxs[1], thisvertex->v[1]);
8597                                 tempsurface->maxs[2] = max(tempsurface->maxs[2], thisvertex->v[2]);
8598                                 // add the vertex if it is not found in the merged set, and
8599                                 // get its index (triangle element) for the surface
8600                                 vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
8601                                 for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
8602                                 {
8603                                         vdata = vertexhashdata + i;
8604                                         if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
8605                                                 break;
8606                                 }
8607                                 if (i < 0)
8608                                 {
8609                                         i = vertexhashcount++;
8610                                         vdata = vertexhashdata + i;
8611                                         *vdata = *thisvertex;
8612                                         vdata->nextindex = vertexhashtable[vertexhashindex];
8613                                         vertexhashtable[vertexhashindex] = i;
8614                                         surfacevertices++;
8615                                 }
8616                                 loadmodel->surfmesh.data_element3i[elementindex++] = i;
8617                                 surfaceelements++;
8618                         }
8619                         surfacetriangles = surfaceelements / 3;
8620                         tempsurface->num_vertices = surfacevertices;
8621                         tempsurface->num_triangles = surfacetriangles;
8622                         tempsurface->num_firstvertex = firstvertex;
8623                         tempsurface->num_firsttriangle = firsttriangle;
8624                         firstvertex += tempsurface->num_vertices;
8625                         firsttriangle += tempsurface->num_triangles;
8626                         tempsurface++;
8627                         loadmodel->num_surfaces++;
8628                 }
8629         }
8630         submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8631         numvertices = firstvertex;
8632         loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
8633         tempsurfaces = NULL;
8634
8635         // allocate storage for final mesh data
8636         loadmodel->num_textures = numtextures * loadmodel->numskins;
8637         loadmodel->num_texturesperskin = numtextures;
8638         data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(model_t *));
8639         loadmodel->brush.submodels = (model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(model_t *);
8640         loadmodel->modelsurfaces_sorted = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
8641         loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
8642         loadmodel->surfmesh.num_vertices = numvertices;
8643         loadmodel->surfmesh.num_triangles = numtriangles;
8644         loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
8645         loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
8646         loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
8647         loadmodel->surfmesh.data_normal3f = (float *)data;data += numvertices * sizeof(float[3]);
8648         loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += numvertices * sizeof(float[2]);
8649
8650         if (loadmodel->surfmesh.num_vertices <= 65536) {
8651                 loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
8652         }
8653
8654         for (j = 0;j < loadmodel->surfmesh.num_vertices;j++)
8655         {
8656                 VectorCopy(vertexhashdata[j].v, loadmodel->surfmesh.data_vertex3f + 3*j);
8657                 VectorCopy(vertexhashdata[j].vn, loadmodel->surfmesh.data_normal3f + 3*j);
8658                 Vector2Copy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
8659         }
8660
8661         // load the textures
8662         for (textureindex = 0;textureindex < numtextures;textureindex++)
8663                 Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
8664         Mod_FreeSkinFiles(skinfiles);
8665
8666         // set the surface textures to their real values now that we loaded them...
8667         for (i = 0;i < loadmodel->num_surfaces;i++)
8668                 loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
8669
8670         // free data
8671         Mem_Free(vertices);
8672         Mem_Free(texturenames);
8673         Mem_Free(obj_v);
8674         Mem_Free(obj_vt);
8675         Mem_Free(obj_vn);
8676         Mem_Free(vertexhashtable);
8677         Mem_Free(vertexhashdata);
8678
8679         // compute all the mesh information that was not loaded from the file
8680         if (loadmodel->surfmesh.data_element3s)
8681                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8682                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8683         Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
8684         // generate normals if the file did not have them
8685         if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
8686                 Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
8687         Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
8688
8689         // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
8690         loadmodel->brush.num_visleafs = 1;
8691         loadmodel->brush.num_leafs = 1;
8692         loadmodel->brush.num_nodes = 0;
8693         loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
8694         loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
8695         loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
8696         loadmodel->brush.num_pvsclusters = 1;
8697         loadmodel->brush.num_pvsclusterbytes = 1;
8698         loadmodel->brush.data_pvsclusters = nobsp_pvs;
8699         //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
8700         //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
8701         loadmodel->brush.data_leafsurfaces = loadmodel->modelsurfaces_sorted;
8702         VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
8703         VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
8704         loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
8705         loadmodel->brush.data_leafs->clusterindex = 0;
8706         loadmodel->brush.data_leafs->areaindex = 0;
8707         loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
8708         loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
8709         loadmodel->brush.data_leafs->numleafbrushes = 0;
8710         loadmodel->brush.data_leafs->firstleafbrush = NULL;
8711         loadmodel->brush.supportwateralpha = true;
8712
8713         if (loadmodel->brush.numsubmodels)
8714                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
8715
8716         mod = loadmodel;
8717         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
8718         {
8719                 if (i > 0)
8720                 {
8721                         char name[10];
8722                         // duplicate the basic information
8723                         dpsnprintf(name, sizeof(name), "*%i", i);
8724                         mod = Mod_FindName(name, loadmodel->name);
8725                         // copy the base model to this one
8726                         *mod = *loadmodel;
8727                         // rename the clone back to its proper name
8728                         dp_strlcpy(mod->name, name, sizeof(mod->name));
8729                         mod->brush.parentmodel = loadmodel;
8730                         // textures and memory belong to the main model
8731                         mod->texturepool = NULL;
8732                         mod->mempool = NULL;
8733                         mod->brush.GetPVS = NULL;
8734                         mod->brush.FatPVS = NULL;
8735                         mod->brush.BoxTouchingPVS = NULL;
8736                         mod->brush.BoxTouchingLeafPVS = NULL;
8737                         mod->brush.BoxTouchingVisibleLeafs = NULL;
8738                         mod->brush.FindBoxClusters = NULL;
8739                         mod->brush.LightPoint = NULL;
8740                         mod->brush.AmbientSoundLevelsForPoint = NULL;
8741                 }
8742                 mod->brush.submodel = i;
8743                 if (loadmodel->brush.submodels)
8744                         loadmodel->brush.submodels[i] = mod;
8745
8746                 // make the model surface list (used by shadowing/lighting)
8747                 mod->submodelsurfaces_start = submodelfirstsurface[i];
8748                 mod->submodelsurfaces_end = submodelfirstsurface[i+1];
8749                 mod->firstmodelbrush = 0;
8750                 mod->nummodelbrushes = 0;
8751
8752                 VectorClear(mod->normalmins);
8753                 VectorClear(mod->normalmaxs);
8754                 l = false;
8755                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
8756                 {
8757                         const msurface_t *surface = mod->data_surfaces + j;
8758                         const float *v3f = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
8759                         int k;
8760                         if (!surface->num_vertices)
8761                                 continue;
8762                         if (!l)
8763                         {
8764                                 l = true;
8765                                 VectorCopy(v3f, mod->normalmins);
8766                                 VectorCopy(v3f, mod->normalmaxs);
8767                         }
8768                         for (k = 0;k < surface->num_vertices;k++, v3f += 3)
8769                         {
8770                                 mod->normalmins[0] = min(mod->normalmins[0], v3f[0]);
8771                                 mod->normalmins[1] = min(mod->normalmins[1], v3f[1]);
8772                                 mod->normalmins[2] = min(mod->normalmins[2], v3f[2]);
8773                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v3f[0]);
8774                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v3f[1]);
8775                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v3f[2]);
8776                         }
8777                 }
8778                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
8779                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
8780                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
8781                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
8782                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
8783                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
8784                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
8785                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
8786                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
8787                 mod->yawmins[2] = mod->normalmins[2];
8788                 mod->yawmaxs[2] = mod->normalmaxs[2];
8789                 mod->radius = modelradius;
8790                 mod->radius2 = modelradius * modelradius;
8791
8792                 Mod_SetDrawSkyAndWater(mod);
8793
8794                 Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
8795                 mod->render_bih = mod->collision_bih;
8796
8797                 // generate VBOs and other shared data before cloning submodels
8798                 if (i == 0)
8799                         Mod_BuildVBOs();
8800         }
8801         mod = loadmodel;
8802         Mem_Free(submodelfirstsurface);
8803
8804         // make the model surface list (used by shadowing/lighting)
8805         Mod_MakeSortedSurfaces(loadmodel);
8806
8807         Con_DPrintf("Stats for obj model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
8808 }