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 int Mod_BSP_FatPVS(model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbufferlength, qbool merge)
3826 {
3827         int bytes = model->brush.num_pvsclusterbytes;
3828         bytes = min(bytes, pvsbufferlength);
3829         if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_BSP_GetPVS(model, org))
3830         {
3831                 memset(pvsbuffer, 0xFF, bytes);
3832                 return bytes;
3833         }
3834         if (!merge)
3835                 memset(pvsbuffer, 0, bytes);
3836         Mod_BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, bytes, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
3837         return bytes;
3838 }
3839
3840 static void Mod_Q1BSP_RoundUpToHullSize(model_t *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs)
3841 {
3842         vec3_t size;
3843         const hull_t *hull;
3844
3845         VectorSubtract(inmaxs, inmins, size);
3846         if (size[0] < mod_q1bsp_zero_hullsize_cutoff.value)
3847                 hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3848         else if (cmodel->brush.ishlbsp)
3849         {
3850                 if (size[0] <= 32)
3851                 {
3852                         if (size[2] < 54) // pick the nearest of 36 or 72
3853                                 hull = &cmodel->brushq1.hulls[3]; // 32x32x36
3854                         else
3855                                 hull = &cmodel->brushq1.hulls[1]; // 32x32x72
3856                 }
3857                 else
3858                         hull = &cmodel->brushq1.hulls[2]; // 64x64x64
3859         }
3860         else
3861         {
3862                 if (size[0] <= 32)
3863                         hull = &cmodel->brushq1.hulls[1]; // 32x32x56
3864                 else
3865                         hull = &cmodel->brushq1.hulls[2]; // 64x64x88
3866         }
3867         VectorCopy(inmins, outmins);
3868         VectorAdd(inmins, hull->clip_size, outmaxs);
3869 }
3870
3871 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);
3872
3873 void Mod_2PSB_Load(model_t *mod, void *buffer, void *bufferend)
3874 {
3875         mod->brush.isbsp2 = true;
3876         mod->brush.isbsp2rmqe = true; // like bsp2 except leaf/node bounds are 16bit (unexpanded)
3877         mod->modeldatatypestring = "Q1BSP2rmqe";
3878         Mod_Q1BSP_Load(mod, buffer, bufferend);
3879 }
3880
3881 void Mod_BSP2_Load(model_t *mod, void *buffer, void *bufferend)
3882 {
3883         mod->brush.isbsp2 = true;
3884         mod->modeldatatypestring = "Q1BSP2";
3885         Mod_Q1BSP_Load(mod, buffer, bufferend);
3886 }
3887
3888 void Mod_HLBSP_Load(model_t *mod, void *buffer, void *bufferend)
3889 {
3890         mod->brush.ishlbsp = true;
3891         mod->modeldatatypestring = "HLBSP";
3892         Mod_Q1BSP_Load(mod, buffer, bufferend);
3893 }
3894
3895 void Mod_Q1BSP_Load(model_t *mod, void *buffer, void *bufferend)
3896 {
3897         int i, j, k;
3898         sizebuf_t lumpsb[HEADER_LUMPS];
3899         mmodel_t *bm;
3900         float dist, modelyawradius, modelradius;
3901         msurface_t *surface;
3902         hullinfo_t hullinfo;
3903         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
3904         model_brush_lightstyleinfo_t styleinfo[256];
3905         int *datapointer;
3906         model_brush_lightstyleinfo_t *lsidatapointer;
3907         sizebuf_t sb;
3908
3909         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
3910
3911         mod->type = mod_brushq1;
3912
3913         mod->brush.skymasking = true;
3914         i = MSG_ReadLittleLong(&sb);
3915
3916         if(!mod->modeldatatypestring)
3917                 mod->modeldatatypestring = "Q1BSP";
3918
3919 // fill in hull info
3920         VectorClear (hullinfo.hullsizes[0][0]);
3921         VectorClear (hullinfo.hullsizes[0][1]);
3922         if (mod->brush.ishlbsp)
3923         {
3924                 hullinfo.filehulls = 4;
3925                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -36);
3926                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 36);
3927                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -32);
3928                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 32);
3929                 VectorSet (hullinfo.hullsizes[3][0], -16, -16, -18);
3930                 VectorSet (hullinfo.hullsizes[3][1], 16, 16, 18);
3931         }
3932         else
3933         {
3934                 hullinfo.filehulls = 4;
3935                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -24);
3936                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 32);
3937                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -24);
3938                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 64);
3939         }
3940
3941 // read lumps
3942         for (i = 0; i < HEADER_LUMPS; i++)
3943         {
3944                 int offset = MSG_ReadLittleLong(&sb);
3945                 int size = MSG_ReadLittleLong(&sb);
3946                 if (offset < 0 || offset + size > sb.cursize)
3947                         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);
3948                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
3949         }
3950
3951         mod->soundfromcenter = true;
3952         mod->TraceBox = Mod_Q1BSP_TraceBox;
3953         mod->TraceLine = Mod_Q1BSP_TraceLine;
3954         mod->TracePoint = Mod_Q1BSP_TracePoint;
3955         mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
3956         mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
3957         mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
3958         mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
3959         mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
3960         mod->brush.GetPVS = Mod_BSP_GetPVS;
3961         mod->brush.FatPVS = Mod_BSP_FatPVS;
3962         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
3963         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
3964         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
3965         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
3966         mod->brush.LightPoint = Mod_BSP_LightPoint;
3967         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
3968         mod->brush.AmbientSoundLevelsForPoint = Mod_Q1BSP_AmbientSoundLevelsForPoint;
3969         mod->brush.RoundUpToHullSize = Mod_Q1BSP_RoundUpToHullSize;
3970         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
3971         mod->Draw = R_Mod_Draw;
3972         mod->DrawDepth = R_Mod_DrawDepth;
3973         mod->DrawDebug = R_Mod_DrawDebug;
3974         mod->DrawPrepass = R_Mod_DrawPrepass;
3975         mod->GetLightInfo = R_Mod_GetLightInfo;
3976         mod->CompileShadowMap = R_Mod_CompileShadowMap;
3977         mod->DrawShadowMap = R_Mod_DrawShadowMap;
3978         mod->DrawLight = R_Mod_DrawLight;
3979
3980 // load into heap
3981
3982         mod->brush.qw_md4sum = 0;
3983         mod->brush.qw_md4sum2 = 0;
3984         for (i = 0;i < HEADER_LUMPS;i++)
3985         {
3986                 int temp;
3987                 if (i == LUMP_ENTITIES)
3988                         continue;
3989                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
3990                 mod->brush.qw_md4sum ^= LittleLong(temp);
3991                 if (i == LUMP_VISIBILITY || i == LUMP_LEAFS || i == LUMP_NODES)
3992                         continue;
3993                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
3994         }
3995
3996         Mod_Q1BSP_LoadEntities(&lumpsb[LUMP_ENTITIES]);
3997         Mod_Q1BSP_LoadVertexes(&lumpsb[LUMP_VERTEXES]);
3998         Mod_Q1BSP_LoadEdges(&lumpsb[LUMP_EDGES]);
3999         Mod_Q1BSP_LoadSurfedges(&lumpsb[LUMP_SURFEDGES]);
4000         Mod_Q1BSP_LoadTextures(&lumpsb[LUMP_TEXTURES]);
4001         Mod_Q1BSP_LoadLighting(&lumpsb[LUMP_LIGHTING]);
4002         Mod_Q1BSP_LoadPlanes(&lumpsb[LUMP_PLANES]);
4003         Mod_Q1BSP_LoadTexinfo(&lumpsb[LUMP_TEXINFO]);
4004         Mod_Q1BSP_LoadFaces(&lumpsb[LUMP_FACES]);
4005         Mod_Q1BSP_LoadLeaffaces(&lumpsb[LUMP_MARKSURFACES]);
4006         Mod_Q1BSP_LoadVisibility(&lumpsb[LUMP_VISIBILITY]);
4007         // load submodels before leafs because they contain the number of vis leafs
4008         Mod_BSP_LoadSubmodels(&lumpsb[LUMP_MODELS], &hullinfo);
4009         Mod_Q1BSP_LoadLeafs(&lumpsb[LUMP_LEAFS]);
4010         Mod_Q1BSP_LoadNodes(&lumpsb[LUMP_NODES]);
4011         Mod_Q1BSP_LoadClipnodes(&lumpsb[LUMP_CLIPNODES], &hullinfo);
4012
4013         for (i = 0; i < HEADER_LUMPS; i++)
4014                 if (lumpsb[i].readcount != lumpsb[i].cursize && i != LUMP_TEXTURES && i != LUMP_LIGHTING)
4015                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4016
4017         // check if the map supports transparent water rendering
4018         loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
4019
4020         // we don't need the compressed pvs data anymore
4021         if (mod->brushq1.data_compressedpvs)
4022                 Mem_Free(mod->brushq1.data_compressedpvs);
4023         mod->brushq1.data_compressedpvs = NULL;
4024         mod->brushq1.num_compressedpvs = 0;
4025
4026         Mod_Q1BSP_MakeHull0();
4027         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
4028                 Mod_BSP_MakePortals();
4029
4030         mod->numframes = 2;             // regular and alternate animation
4031         mod->numskins = 1;
4032
4033         if (loadmodel->brush.numsubmodels)
4034                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4035
4036         // LadyHavoc: to clear the fog around the original quake submodel code, I
4037         // will explain:
4038         // first of all, some background info on the submodels:
4039         // model 0 is the map model (the world, named maps/e1m1.bsp for example)
4040         // model 1 and higher are submodels (doors and the like, named *1, *2, etc)
4041         // now the weird for loop itself:
4042         // the loop functions in an odd way, on each iteration it sets up the
4043         // current 'mod' model (which despite the confusing code IS the model of
4044         // the number i), at the end of the loop it duplicates the model to become
4045         // the next submodel, and loops back to set up the new submodel.
4046
4047         // LadyHavoc: now the explanation of my sane way (which works identically):
4048         // set up the world model, then on each submodel copy from the world model
4049         // and set up the submodel with the respective model info.
4050         totalstylesurfaces = 0;
4051         totalstyles = 0;
4052         for (i = 0;i < mod->brush.numsubmodels;i++)
4053         {
4054                 memset(stylecounts, 0, sizeof(stylecounts));
4055                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4056                 {
4057                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4058                         for (j = 0;j < MAXLIGHTMAPS;j++)
4059                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4060                 }
4061                 for (k = 0;k < 255;k++)
4062                 {
4063                         totalstyles++;
4064                         if (stylecounts[k])
4065                                 totalstylesurfaces += stylecounts[k];
4066                 }
4067         }
4068         // bones_was_here: using a separate allocation for model_brush_lightstyleinfo_t
4069         // because on a 64-bit machine it no longer has the same alignment requirement as int.
4070         lsidatapointer = Mem_AllocType(mod->mempool, model_brush_lightstyleinfo_t, totalstyles * sizeof(model_brush_lightstyleinfo_t));
4071         datapointer = Mem_AllocType(mod->mempool, int, mod->num_surfaces * sizeof(int) + totalstylesurfaces * sizeof(int));
4072         mod->modelsurfaces_sorted = datapointer;datapointer += mod->num_surfaces;
4073         for (i = 0;i < mod->brush.numsubmodels;i++)
4074         {
4075                 // LadyHavoc: this code was originally at the end of this loop, but
4076                 // has been transformed to something more readable at the start here.
4077
4078                 if (i > 0)
4079                 {
4080                         char name[10];
4081                         // duplicate the basic information
4082                         dpsnprintf(name, sizeof(name), "*%i", i);
4083                         mod = Mod_FindName(name, loadmodel->name);
4084                         // copy the base model to this one
4085                         *mod = *loadmodel;
4086                         // rename the clone back to its proper name
4087                         dp_strlcpy(mod->name, name, sizeof(mod->name));
4088                         mod->brush.parentmodel = loadmodel;
4089                         // textures and memory belong to the main model
4090                         mod->texturepool = NULL;
4091                         mod->mempool = NULL;
4092                         mod->brush.GetPVS = NULL;
4093                         mod->brush.FatPVS = NULL;
4094                         mod->brush.BoxTouchingPVS = NULL;
4095                         mod->brush.BoxTouchingLeafPVS = NULL;
4096                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4097                         mod->brush.FindBoxClusters = NULL;
4098                         mod->brush.LightPoint = NULL;
4099                         mod->brush.AmbientSoundLevelsForPoint = NULL;
4100                 }
4101
4102                 mod->brush.submodel = i;
4103
4104                 if (loadmodel->brush.submodels)
4105                         loadmodel->brush.submodels[i] = mod;
4106
4107                 bm = &mod->brushq1.submodels[i];
4108
4109                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
4110                 for (j=1 ; j<MAX_MAP_HULLS ; j++)
4111                 {
4112                         mod->brushq1.hulls[j].firstclipnode = bm->headnode[j];
4113                         mod->brushq1.hulls[j].lastclipnode = mod->brushq1.numclipnodes - 1;
4114                 }
4115
4116                 mod->submodelsurfaces_start = bm->firstface;
4117                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
4118
4119                 // set node/leaf parents for this submodel
4120                 Mod_BSP_LoadNodes_RecursiveSetParent(mod->brush.data_nodes + mod->brushq1.hulls[0].firstclipnode, NULL);
4121
4122                 // this has to occur after hull info has been set, as it uses Mod_Q1BSP_PointSuperContents
4123                 Mod_Q1BSP_AssignNoShadowSkySurfaces(mod);
4124
4125                 // copy the submodel bounds, then enlarge the yaw and rotated bounds according to radius
4126                 // (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)
4127                 VectorCopy(bm->mins, mod->normalmins);
4128                 VectorCopy(bm->maxs, mod->normalmaxs);
4129                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
4130                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
4131                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
4132                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
4133                 modelradius = modelyawradius + modelradius * modelradius;
4134                 modelyawradius = sqrt(modelyawradius);
4135                 modelradius = sqrt(modelradius);
4136                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
4137                 mod->yawmins[2] = mod->normalmins[2];
4138                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
4139                 mod->yawmaxs[2] = mod->normalmaxs[2];
4140                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
4141                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
4142                 mod->radius = modelradius;
4143                 mod->radius2 = modelradius * modelradius;
4144
4145                 Mod_SetDrawSkyAndWater(mod);
4146
4147                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
4148                 {
4149                         // build lightstyle update chains
4150                         // (used to rapidly mark lightmapupdateflags on many surfaces
4151                         // when d_lightstylevalue changes)
4152                         memset(stylecounts, 0, sizeof(stylecounts));
4153                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4154                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4155                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
4156                         mod->brushq1.num_lightstyles = 0;
4157                         for (k = 0;k < 255;k++)
4158                         {
4159                                 if (stylecounts[k])
4160                                 {
4161                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
4162                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
4163                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
4164                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = datapointer;datapointer += stylecounts[k];
4165                                         remapstyles[k] = mod->brushq1.num_lightstyles;
4166                                         mod->brushq1.num_lightstyles++;
4167                                 }
4168                         }
4169                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4170                         {
4171                                 surface = mod->data_surfaces + k;
4172                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4173                                 {
4174                                         if (surface->lightmapinfo->styles[j] != 255)
4175                                         {
4176                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
4177                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
4178                                         }
4179                                 }
4180                         }
4181                         mod->brushq1.data_lightstyleinfo = lsidatapointer;lsidatapointer += mod->brushq1.num_lightstyles;
4182                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
4183                 }
4184                 else
4185                 {
4186                         // LadyHavoc: empty submodel(lacrima.bsp has such a glitch)
4187                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
4188                 }
4189                 //mod->brushq1.num_visleafs = bm->visleafs;
4190
4191                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
4192                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
4193
4194                 if (mod_q1bsp_polygoncollisions.integer)
4195                 {
4196                         mod->collision_bih = mod->render_bih;
4197                         // point traces and contents checks still use the bsp tree
4198                         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4199                         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4200                         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4201                         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
4202                 }
4203
4204                 // generate VBOs and other shared data before cloning submodels
4205                 if (i == 0)
4206                 {
4207                         Mod_BuildVBOs();
4208                         Mod_Q1BSP_LoadMapBrushes();
4209                         //Mod_Q1BSP_ProcessLightList();
4210                 }
4211         }
4212         mod = loadmodel;
4213
4214         // make the model surface list (used by shadowing/lighting)
4215         Mod_MakeSortedSurfaces(loadmodel);
4216
4217         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);
4218 }
4219
4220 int Mod_Q2BSP_SuperContentsFromNativeContents(int nativecontents)
4221 {
4222         int supercontents = 0;
4223         if (nativecontents & CONTENTSQ2_SOLID)
4224                 supercontents |= SUPERCONTENTS_SOLID;
4225         if (nativecontents & CONTENTSQ2_WATER)
4226                 supercontents |= SUPERCONTENTS_WATER;
4227         if (nativecontents & CONTENTSQ2_SLIME)
4228                 supercontents |= SUPERCONTENTS_SLIME;
4229         if (nativecontents & CONTENTSQ2_LAVA)
4230                 supercontents |= SUPERCONTENTS_LAVA;
4231         if (nativecontents & CONTENTSQ2_MONSTER)
4232                 supercontents |= SUPERCONTENTS_BODY;
4233         if (nativecontents & CONTENTSQ2_DEADMONSTER)
4234                 supercontents |= SUPERCONTENTS_CORPSE;
4235         if (nativecontents & CONTENTSQ2_PLAYERCLIP)
4236                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
4237         if (nativecontents & CONTENTSQ2_MONSTERCLIP)
4238                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
4239         if (!(nativecontents & CONTENTSQ2_TRANSLUCENT))
4240                 supercontents |= SUPERCONTENTS_OPAQUE;
4241         return supercontents;
4242 }
4243
4244 int Mod_Q2BSP_NativeContentsFromSuperContents(int supercontents)
4245 {
4246         int nativecontents = 0;
4247         if (supercontents & SUPERCONTENTS_SOLID)
4248                 nativecontents |= CONTENTSQ2_SOLID;
4249         if (supercontents & SUPERCONTENTS_WATER)
4250                 nativecontents |= CONTENTSQ2_WATER;
4251         if (supercontents & SUPERCONTENTS_SLIME)
4252                 nativecontents |= CONTENTSQ2_SLIME;
4253         if (supercontents & SUPERCONTENTS_LAVA)
4254                 nativecontents |= CONTENTSQ2_LAVA;
4255         if (supercontents & SUPERCONTENTS_BODY)
4256                 nativecontents |= CONTENTSQ2_MONSTER;
4257         if (supercontents & SUPERCONTENTS_CORPSE)
4258                 nativecontents |= CONTENTSQ2_DEADMONSTER;
4259         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
4260                 nativecontents |= CONTENTSQ2_PLAYERCLIP;
4261         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
4262                 nativecontents |= CONTENTSQ2_MONSTERCLIP;
4263         if (!(supercontents & SUPERCONTENTS_OPAQUE))
4264                 nativecontents |= CONTENTSQ2_TRANSLUCENT;
4265         return nativecontents;
4266 }
4267
4268 static void Mod_Q2BSP_LoadVisibility(sizebuf_t *sb)
4269 {
4270         int i, count;
4271         loadmodel->brushq1.num_compressedpvs = 0;
4272         loadmodel->brushq1.data_compressedpvs = NULL;
4273         loadmodel->brush.num_pvsclusters = 0;
4274         loadmodel->brush.num_pvsclusterbytes = 0;
4275         loadmodel->brush.data_pvsclusters = NULL;
4276
4277         if (!sb->cursize)
4278                 return;
4279
4280         count = MSG_ReadLittleLong(sb);
4281         loadmodel->brush.num_pvsclusters = count;
4282         loadmodel->brush.num_pvsclusterbytes = (count+7)>>3;
4283         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*loadmodel->brush.num_pvsclusterbytes);
4284         for (i = 0;i < count;i++)
4285         {
4286                 int pvsofs = MSG_ReadLittleLong(sb);
4287                 /*int phsofs = */MSG_ReadLittleLong(sb);
4288                 // decompress the vis data for this cluster
4289                 // (note this accesses the underlying data store of sb, which is kind of evil)
4290                 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);
4291         }
4292         // hush the loading error check later - we had to do random access on this lump, so we didn't read to the end
4293         sb->readcount = sb->cursize;
4294 }
4295
4296 static void Mod_Q2BSP_LoadNodes(sizebuf_t *sb)
4297 {
4298         int                     i, j, count, p, child[2];
4299         mnode_t         *out;
4300         int structsize = 28;
4301
4302         if (sb->cursize % structsize)
4303                 Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
4304         count = sb->cursize / structsize;
4305         if (count == 0)
4306                 Host_Error("Mod_Q2BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
4307         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4308
4309         loadmodel->brush.data_nodes = out;
4310         loadmodel->brush.num_nodes = count;
4311
4312         for ( i=0 ; i<count ; i++, out++)
4313         {
4314                 p = MSG_ReadLittleLong(sb);
4315                 out->plane = loadmodel->brush.data_planes + p;
4316                 child[0] = MSG_ReadLittleLong(sb);
4317                 child[1] = MSG_ReadLittleLong(sb);
4318                 out->mins[0] = MSG_ReadLittleShort(sb);
4319                 out->mins[1] = MSG_ReadLittleShort(sb);
4320                 out->mins[2] = MSG_ReadLittleShort(sb);
4321                 out->maxs[0] = MSG_ReadLittleShort(sb);
4322                 out->maxs[1] = MSG_ReadLittleShort(sb);
4323                 out->maxs[2] = MSG_ReadLittleShort(sb);
4324                 out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
4325                 out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
4326                 if (out->firstsurface + out->numsurfaces > (unsigned int)loadmodel->num_surfaces)
4327                 {
4328                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid surface index range %i+%i (file has only %i surfaces)\n", out->firstsurface, out->numsurfaces, loadmodel->num_surfaces);
4329                         out->firstsurface = 0;
4330                         out->numsurfaces = 0;
4331                 }
4332                 for (j=0 ; j<2 ; j++)
4333                 {
4334                         p = child[j];
4335                         if (p >= 0)
4336                         {
4337                                 if (p < loadmodel->brush.num_nodes)
4338                                         out->children[j] = loadmodel->brush.data_nodes + p;
4339                                 else
4340                                 {
4341                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
4342                                         // map it to the solid leaf
4343                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4344                                 }
4345                         }
4346                         else
4347                         {
4348                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
4349                                 p = -(p+1);
4350                                 if (p < loadmodel->brush.num_leafs)
4351                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
4352                                 else
4353                                 {
4354                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
4355                                         // map it to the solid leaf
4356                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4357                                 }
4358                         }
4359                 }
4360         }
4361
4362         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);        // sets nodes and leafs
4363 }
4364
4365 static void Mod_Q2BSP_LoadTexinfo(sizebuf_t *sb)
4366 {
4367         mtexinfo_t *out;
4368         int i, l, count;
4369         int structsize = 76;
4370         int maxtextures = 1024; // hardcoded limit of quake2 engine, so we may as well use it as an upper bound
4371         char filename[MAX_QPATH];
4372
4373         if (sb->cursize % structsize)
4374                 Host_Error("Mod_Q2BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
4375         count = sb->cursize / structsize;
4376         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4377         loadmodel->brushq1.texinfo = out;
4378         loadmodel->brushq1.numtexinfo = count;
4379         loadmodel->num_texturesperskin = 0;
4380         loadmodel->data_textures = (texture_t*)Mem_Alloc(loadmodel->mempool, maxtextures * sizeof(texture_t));
4381
4382         for (i = 0;i < count;i++, out++)
4383         {
4384                 int j, k;
4385                 for (k = 0;k < 2;k++)
4386                         for (j = 0;j < 4;j++)
4387                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
4388
4389                 out->q2flags = MSG_ReadLittleLong(sb);
4390                 out->q2value = MSG_ReadLittleLong(sb);
4391                 MSG_ReadBytes(sb, 32, (unsigned char*)out->q2texture);
4392                 out->q2texture[31] = 0; // make absolutely sure it is terminated
4393                 out->q2nexttexinfo = MSG_ReadLittleLong(sb);
4394
4395                 // find an existing match for the texture if possible
4396                 dpsnprintf(filename, sizeof(filename), "textures/%s.wal", out->q2texture);
4397                 for (j = 0;j < loadmodel->num_texturesperskin;j++)
4398                         if (!strcmp(filename, loadmodel->data_textures[j].name)
4399                          && out->q2flags == loadmodel->data_textures[j].q2flags
4400                          && out->q2value == loadmodel->data_textures[j].q2value)
4401                                 break;
4402                 // if we don't find the texture, store the new texture
4403                 if (j == loadmodel->num_texturesperskin)
4404                 {
4405                         if (loadmodel->num_texturesperskin < maxtextures)
4406                         {
4407                                 texture_t *tx = loadmodel->data_textures + j;
4408                                 int q2flags = out->q2flags;
4409                                 unsigned char *walfile = NULL;
4410                                 fs_offset_t walfilesize = 0;
4411                                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, tx, filename, true, true, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
4412                                 // now read the .wal file to get metadata (even if a .tga was overriding it, we still need the wal data)
4413                                 walfile = FS_LoadFile(filename, tempmempool, true, &walfilesize);
4414                                 if (walfile)
4415                                 {
4416                                         int w, h;
4417                                         LoadWAL_GetMetadata(walfile, (int)walfilesize, &w, &h, NULL, NULL, &tx->q2contents, NULL);
4418                                         tx->width = w;
4419                                         tx->height = h;
4420                                         Mem_Free(walfile);
4421                                 }
4422                                 else
4423                                 {
4424                                         tx->width = 16;
4425                                         tx->height = 16;
4426                                 }
4427                                 tx->q2flags = out->q2flags;
4428                                 tx->q2value = out->q2value;
4429                                 // also modify the texture to have the correct contents and such based on flags
4430                                 // note that we create multiple texture_t structures if q2flags differs
4431                                 if (q2flags & Q2SURF_LIGHT)
4432                                 {
4433                                         // doesn't mean anything to us
4434                                 }
4435                                 if (q2flags & Q2SURF_SLICK)
4436                                 {
4437                                         // would be nice to support...
4438                                 }
4439                                 if (q2flags & Q2SURF_SKY)
4440                                 {
4441                                         // sky is a rather specific thing
4442                                         q2flags &= ~Q2SURF_NODRAW; // quake2 had a slightly different meaning than we have in mind here...
4443                                         tx->basematerialflags = MATERIALFLAG_SKY;
4444                                         tx->supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE;
4445                                         tx->surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
4446                                 }
4447                                 if (q2flags & Q2SURF_WARP)
4448                                 {
4449                                         // we use a scroll instead of a warp
4450                                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_FULLBRIGHT;
4451                                         // if it's also transparent, we can enable the WATERSHADER
4452                                         // but we do not set the WATERALPHA flag because we don't
4453                                         // want to honor r_wateralpha in q2bsp
4454                                         // (it would go against the artistic intent)
4455                                         if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66))
4456                                                 tx->basematerialflags |= MATERIALFLAG_WATERSHADER;
4457                                 }
4458                                 if (q2flags & Q2SURF_TRANS33)
4459                                 {
4460                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4461                                         tx->basealpha = 1.0f / 3.0f;
4462                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4463                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4464                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4465                                 }
4466                                 if (q2flags & Q2SURF_TRANS66)
4467                                 {
4468                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4469                                         tx->basealpha = 2.0f / 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_FLOWING) && tx->materialshaderpass != NULL)
4475                                 {
4476                                         tx->materialshaderpass->tcmods[0].tcmod = Q3TCMOD_SCROLL;
4477                                         if (q2flags & Q2SURF_WARP)
4478                                                 tx->materialshaderpass->tcmods[0].parms[0] = -0.5f;
4479                                         else
4480                                                 tx->materialshaderpass->tcmods[0].parms[0] = -1.6f;
4481                                         tx->materialshaderpass->tcmods[0].parms[1] = 0.0f;
4482                                 }
4483                                 if (q2flags & Q2SURF_ALPHATEST)
4484                                 {
4485                                         // KMQUAKE2 and other modded engines added this flag for lit alpha tested surfaces
4486                                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
4487                                 }
4488                                 else if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66 | Q2SURF_WARP))
4489                                 {
4490                                         if (!mod_q2bsp_littransparentsurfaces.integer)
4491                                                 tx->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
4492                                 }
4493                                 if (q2flags & Q2SURF_NODRAW)
4494                                 {
4495                                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
4496                                 }
4497                                 if (tx->q2contents & (Q2CONTENTS_TRANSLUCENT | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_PLAYERCLIP))
4498                                         tx->q2contents |= Q2CONTENTS_DETAIL;
4499                                 if (!(tx->q2contents & (Q2CONTENTS_SOLID | Q2CONTENTS_WINDOW | Q2CONTENTS_AUX | Q2CONTENTS_LAVA | Q2CONTENTS_SLIME | Q2CONTENTS_WATER | Q2CONTENTS_MIST | Q2CONTENTS_PLAYERCLIP | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_MIST)))
4500                                         tx->q2contents |= Q2CONTENTS_SOLID;
4501                                 if (tx->q2flags & (Q2SURF_HINT | Q2SURF_SKIP))
4502                                         tx->q2contents = 0;
4503                                 tx->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(tx->q2contents);
4504                                 // set the current values to the base values
4505                                 tx->currentframe = tx;
4506                                 tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
4507                                 tx->currentmaterialflags = tx->basematerialflags;
4508                                 loadmodel->num_texturesperskin++;
4509                                 loadmodel->num_textures = loadmodel->num_texturesperskin;
4510                         }
4511                         else
4512                         {
4513                                 Con_Printf("Mod_Q2BSP_LoadTexinfo: max textures reached (%i)\n", maxtextures);
4514                                 j = 0; // use first texture and give up
4515                         }
4516                 }
4517                 // store the index we found for this texture
4518                 out->textureindex = j;
4519         }
4520
4521         // realloc the textures array now that we know how many we actually need
4522         loadmodel->data_textures = (texture_t*)Mem_Realloc(loadmodel->mempool, loadmodel->data_textures, loadmodel->num_texturesperskin * sizeof(texture_t));
4523
4524         // now assemble the texture chains
4525         // if we encounter the textures out of order, the later ones won't mark the earlier ones in a sequence, so the earlier
4526         for (i = 0, out = loadmodel->brushq1.texinfo;i < count;i++, out++)
4527         {
4528                 int j, k;
4529                 texture_t *t = loadmodel->data_textures + out->textureindex;
4530                 t->currentframe = t; // fix the reallocated pointer
4531
4532                 // if this is not animated, skip it
4533                 // if this is already processed, skip it (part of an existing sequence)
4534                 if (out->q2nexttexinfo == 0 || t->animated)
4535                         continue;
4536
4537                 // store the array of frames to use
4538                 t->animated = 2; // q2bsp animation
4539                 t->anim_total[0] = 0;
4540                 t->anim_total[1] = 0;
4541                 // gather up to 10 frames (we don't support more)
4542                 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)
4543                 {
4544                         // detect looping and stop there
4545                         if (t->anim_total[0] && loadmodel->brushq1.texinfo[j].textureindex == out->textureindex)
4546                                 break;
4547                         t->anim_frames[0][t->anim_total[0]++] = &loadmodel->data_textures[loadmodel->brushq1.texinfo[j].textureindex];
4548                 }
4549                 // we could look for the +a sequence here if this is the +0 sequence,
4550                 // but it seems that quake2 did not implement that (even though the
4551                 // files exist in the baseq2 content)
4552
4553                 // write the frame sequence to all the textures involved (just like
4554                 // in the q1bsp loader)
4555                 //
4556                 // note that this can overwrite the rest of the sequence - so if the
4557                 // start of a sequence is found later than the other parts of the
4558                 // sequence, it will go back and rewrite them correctly.
4559                 for (k = 0;k < t->anim_total[0];k++)
4560                 {
4561                         texture_t *txk = t->anim_frames[0][k];
4562                         txk->animated = t->animated;
4563                         txk->anim_total[0] = t->anim_total[0];
4564                         for (l = 0;l < t->anim_total[0];l++)
4565                                 txk->anim_frames[0][l] = t->anim_frames[0][l];
4566                 }
4567         }
4568 }
4569
4570 static void Mod_Q2BSP_LoadLighting(sizebuf_t *sb)
4571 {
4572         // LadyHavoc: this fits exactly the same format that we use in .lit files
4573         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
4574         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.lightdata);
4575 }
4576
4577 static void Mod_Q2BSP_LoadLeafs(sizebuf_t *sb)
4578 {
4579         mleaf_t *out;
4580         int i, j, count, firstmarksurface, nummarksurfaces, firstmarkbrush, nummarkbrushes;
4581         int structsize = 28;
4582
4583         if (sb->cursize % structsize)
4584                 Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
4585         count = sb->cursize / structsize;
4586         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4587
4588         loadmodel->brush.data_leafs = out;
4589         loadmodel->brush.num_leafs = count;
4590
4591         // FIXME: this function could really benefit from some error checking
4592         for ( i=0 ; i<count ; i++, out++)
4593         {
4594                 out->contents = MSG_ReadLittleLong(sb);
4595                 out->clusterindex = MSG_ReadLittleShort(sb);
4596                 out->areaindex = MSG_ReadLittleShort(sb);
4597                 out->mins[0] = MSG_ReadLittleShort(sb);
4598                 out->mins[1] = MSG_ReadLittleShort(sb);
4599                 out->mins[2] = MSG_ReadLittleShort(sb);
4600                 out->maxs[0] = MSG_ReadLittleShort(sb);
4601                 out->maxs[1] = MSG_ReadLittleShort(sb);
4602                 out->maxs[2] = MSG_ReadLittleShort(sb);
4603
4604                 firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
4605                 nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
4606                 firstmarkbrush = (unsigned short)MSG_ReadLittleShort(sb);
4607                 nummarkbrushes  = (unsigned short)MSG_ReadLittleShort(sb);
4608
4609                 for (j = 0;j < 4;j++)
4610                         out->ambient_sound_level[j] = 0;
4611
4612                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
4613                 {
4614                         Con_Print("Mod_Q2BSP_LoadLeafs: invalid clusterindex\n");
4615                         out->clusterindex = -1;
4616                 }
4617
4618                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
4619                 {
4620                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
4621                         out->numleafsurfaces = nummarksurfaces;
4622                 }
4623                 else
4624                 {
4625                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
4626                         out->firstleafsurface = NULL;
4627                         out->numleafsurfaces = 0;
4628                 }
4629
4630                 if (firstmarkbrush >= 0 && firstmarkbrush + nummarkbrushes <= loadmodel->brush.num_leafbrushes)
4631                 {
4632                         out->firstleafbrush = loadmodel->brush.data_leafbrushes + firstmarkbrush;
4633                         out->numleafbrushes = nummarkbrushes;
4634                 }
4635                 else
4636                 {
4637                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafbrush range %i:%i outside range %i:%i\n", firstmarkbrush, firstmarkbrush+nummarkbrushes, 0, loadmodel->brush.num_leafbrushes);
4638                         out->firstleafbrush = NULL;
4639                         out->numleafbrushes = 0;
4640                 }
4641         }
4642 }
4643
4644 static void Mod_Q2BSP_LoadLeafBrushes(sizebuf_t *sb)
4645 {
4646         int i, j;
4647         int structsize = 2;
4648
4649         if (sb->cursize % structsize)
4650                 Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
4651         loadmodel->brush.num_leafbrushes = sb->cursize / structsize;
4652         loadmodel->brush.data_leafbrushes = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafbrushes * sizeof(int));
4653
4654         for (i = 0;i < loadmodel->brush.num_leafbrushes;i++)
4655         {
4656                 j = (unsigned short) MSG_ReadLittleShort(sb);
4657                 if (j >= loadmodel->brush.num_brushes)
4658                         Host_Error("Mod_Q1BSP_LoadLeafBrushes: bad brush number");
4659                 loadmodel->brush.data_leafbrushes[i] = j;
4660         }
4661 }
4662
4663 static void Mod_Q2BSP_LoadBrushSides(sizebuf_t *sb)
4664 {
4665         q3mbrushside_t *out;
4666         int i, n, count;
4667         int structsize = 4;
4668
4669         if (sb->cursize % structsize)
4670                 Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
4671         count = sb->cursize / structsize;
4672         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4673
4674         loadmodel->brush.data_brushsides = out;
4675         loadmodel->brush.num_brushsides = count;
4676
4677         for (i = 0;i < count;i++, out++)
4678         {
4679                 n = (unsigned short)MSG_ReadLittleShort(sb);
4680                 if (n < 0 || n >= loadmodel->brush.num_planes)
4681                         Host_Error("Mod_Q2BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
4682                 out->plane = loadmodel->brush.data_planes + n;
4683                 n = MSG_ReadLittleShort(sb);
4684                 if (n >= 0)
4685                 {
4686                         if (n >= loadmodel->brushq1.numtexinfo)
4687                                 Host_Error("Mod_Q2BSP_LoadBrushSides: invalid texinfo index %i (%i texinfos)", n, loadmodel->brushq1.numtexinfo);
4688                         out->texture = loadmodel->data_textures + loadmodel->brushq1.texinfo[n].textureindex;
4689                 }
4690                 else
4691                 {
4692                         //Con_Printf("Mod_Q2BSP_LoadBrushSides: brushside %i has texinfo index %i < 0, changing to generic texture!\n", i, n);
4693                         out->texture = &mod_q1bsp_texture_solid;
4694                 }
4695         }
4696 }
4697
4698 static void Mod_Q2BSP_LoadBrushes(sizebuf_t *sb)
4699 {
4700         q3mbrush_t *out;
4701         int i, j, firstside, numsides, contents, count, maxplanes, q3surfaceflags, supercontents;
4702         colplanef_t *planes;
4703         int structsize = 12;
4704         qbool brushmissingtextures;
4705         int numbrushesmissingtextures = 0;
4706         int numcreatedtextures = 0;
4707
4708         if (sb->cursize % structsize)
4709                 Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
4710         count = sb->cursize / structsize;
4711         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4712
4713         loadmodel->brush.data_brushes = out;
4714         loadmodel->brush.num_brushes = count;
4715
4716         maxplanes = 0;
4717         planes = NULL;
4718
4719         for (i = 0; i < count; i++, out++)
4720         {
4721                 firstside = MSG_ReadLittleLong(sb);
4722                 numsides = MSG_ReadLittleLong(sb);
4723                 contents = MSG_ReadLittleLong(sb);
4724                 if (firstside < 0 || firstside + numsides > loadmodel->brush.num_brushsides)
4725                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", firstside, firstside + numsides, loadmodel->brush.num_brushsides);
4726
4727                 out->firstbrushside = loadmodel->brush.data_brushsides + firstside;
4728                 out->numbrushsides = numsides;
4729                 // convert the contents to our values
4730                 supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(contents);
4731
4732                 // problem: q2bsp brushes have contents but not a texture
4733                 // problem: q2bsp brushsides *may* have a texture or may not
4734                 // problem: all brushsides and brushes must have a texture for trace_hittexture functionality to work, and the collision code is engineered around this assumption
4735                 // solution: nasty hacks
4736                 brushmissingtextures = false;
4737                 out->texture = NULL;
4738                 for (j = 0; j < out->numbrushsides; j++)
4739                 {
4740                         if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4741                                 brushmissingtextures = true;
4742                         else
4743                         {
4744                                 // if we can find a matching texture on a brush side we can use it instead of creating one
4745                                 if (out->firstbrushside[j].texture->supercontents == supercontents)
4746                                         out->texture = out->firstbrushside[j].texture;
4747                         }
4748                 }
4749                 if (brushmissingtextures || out->texture == NULL)
4750                 {
4751                         numbrushesmissingtextures++;
4752                         // if we didn't find any appropriate texture (matching contents), we'll have to create one
4753                         // we could search earlier ones for a matching one but that can be slow
4754                         if (out->texture == NULL)
4755                         {
4756                                 texture_t *validtexture;
4757                                 validtexture = (texture_t *)Mem_Alloc(loadmodel->mempool, sizeof(texture_t));
4758                                 dpsnprintf(validtexture->name, sizeof(validtexture->name), "brushcollision%i", numcreatedtextures);
4759                                 validtexture->surfaceflags = 0;
4760                                 validtexture->supercontents = supercontents;
4761                                 numcreatedtextures++;
4762                                 out->texture = validtexture;
4763                         }
4764                         // out->texture now contains a texture with appropriate contents, copy onto any missing sides
4765                         for (j = 0; j < out->numbrushsides; j++)
4766                                 if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4767                                         out->firstbrushside[j].texture = out->texture;
4768                 }
4769
4770                 // make a colbrush from the brush
4771                 q3surfaceflags = 0;
4772                 // make a list of mplane_t structs to construct a colbrush from
4773                 if (maxplanes < out->numbrushsides)
4774                 {
4775                         maxplanes = out->numbrushsides;
4776                         if (planes)
4777                                 Mem_Free(planes);
4778                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
4779                 }
4780                 for (j = 0;j < out->numbrushsides;j++)
4781                 {
4782                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
4783                         planes[j].dist = out->firstbrushside[j].plane->dist;
4784                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
4785                         planes[j].texture = out->firstbrushside[j].texture;
4786                         q3surfaceflags |= planes[j].q3surfaceflags;
4787                 }
4788                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
4789
4790                 // this whole loop can take a while (e.g. on redstarrepublic4)
4791                 CL_KeepaliveMessage(false);
4792         }
4793         if (planes)
4794                 Mem_Free(planes);
4795         if (numcreatedtextures)
4796                 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);
4797 }
4798
4799 static void Mod_Q2BSP_LoadPOP(sizebuf_t *sb)
4800 {
4801         // 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)
4802         sb->readcount = sb->cursize;
4803 }
4804
4805 static void Mod_Q2BSP_LoadAreas(sizebuf_t *sb)
4806 {
4807         // we currently don't use areas, they represent closable doors as vis blockers
4808         sb->readcount = sb->cursize;
4809 }
4810
4811 static void Mod_Q2BSP_LoadAreaPortals(sizebuf_t *sb)
4812 {
4813         // we currently don't use areas, they represent closable doors as vis blockers
4814         sb->readcount = sb->cursize;
4815 }
4816
4817 static void Mod_Q2BSP_FindSubmodelBrushRange_r(model_t *mod, mnode_t *node, int *first, int *last)
4818 {
4819         int i;
4820         mleaf_t *leaf;
4821         while (node->plane)
4822         {
4823                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, node->children[0], first, last);
4824                 node = node->children[1];
4825         }
4826         leaf = (mleaf_t*)node;
4827         for (i = 0;i < leaf->numleafbrushes;i++)
4828         {
4829                 int brushnum = leaf->firstleafbrush[i];
4830                 if (*first > brushnum)
4831                         *first = brushnum;
4832                 if (*last < brushnum)
4833                         *last = brushnum;
4834         }
4835 }
4836
4837 static void Mod_Q2BSP_Load(model_t *mod, void *buffer, void *bufferend)
4838 {
4839         int i, j, k;
4840         sizebuf_t lumpsb[Q2HEADER_LUMPS];
4841         mmodel_t *bm;
4842         float dist, modelyawradius, modelradius;
4843         msurface_t *surface;
4844         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
4845         model_brush_lightstyleinfo_t styleinfo[256];
4846         int *datapointer;
4847         model_brush_lightstyleinfo_t *lsidatapointer;
4848         sizebuf_t sb;
4849
4850         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
4851
4852         mod->type = mod_brushq2;
4853
4854         mod->brush.ishlbsp = false;
4855         mod->brush.isbsp2rmqe = false;
4856         mod->brush.isbsp2 = false;
4857         mod->brush.isq2bsp = true; // q1bsp loaders mostly work but we need a few tweaks
4858         mod->brush.isq3bsp = false;
4859         mod->brush.skymasking = true;
4860         mod->modeldatatypestring = "Q2BSP";
4861
4862         i = MSG_ReadLittleLong(&sb);
4863         if (i != Q2BSPMAGIC)
4864                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4865
4866         i = MSG_ReadLittleLong(&sb);
4867         if (i != Q2BSPVERSION)
4868                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4869
4870 // read lumps
4871         for (i = 0; i < Q2HEADER_LUMPS; i++)
4872         {
4873                 int offset = MSG_ReadLittleLong(&sb);
4874                 int size = MSG_ReadLittleLong(&sb);
4875                 if (offset < 0 || offset + size > sb.cursize)
4876                         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);
4877                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
4878         }
4879
4880         mod->soundfromcenter = true;
4881         mod->TracePoint = Mod_CollisionBIH_TracePoint;
4882         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4883         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4884         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4885         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
4886         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
4887         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
4888         mod->brush.SuperContentsFromNativeContents = Mod_Q2BSP_SuperContentsFromNativeContents;
4889         mod->brush.NativeContentsFromSuperContents = Mod_Q2BSP_NativeContentsFromSuperContents;
4890         mod->brush.GetPVS = Mod_BSP_GetPVS;
4891         mod->brush.FatPVS = Mod_BSP_FatPVS;
4892         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
4893         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
4894         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
4895         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
4896         mod->brush.LightPoint = Mod_BSP_LightPoint;
4897         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
4898         mod->brush.AmbientSoundLevelsForPoint = NULL;
4899         mod->brush.RoundUpToHullSize = NULL;
4900         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
4901         mod->Draw = R_Mod_Draw;
4902         mod->DrawDepth = R_Mod_DrawDepth;
4903         mod->DrawDebug = R_Mod_DrawDebug;
4904         mod->DrawPrepass = R_Mod_DrawPrepass;
4905         mod->GetLightInfo = R_Mod_GetLightInfo;
4906         mod->CompileShadowMap = R_Mod_CompileShadowMap;
4907         mod->DrawShadowMap = R_Mod_DrawShadowMap;
4908         mod->DrawLight = R_Mod_DrawLight;
4909
4910 // load into heap
4911
4912         mod->brush.qw_md4sum = 0;
4913         mod->brush.qw_md4sum2 = 0;
4914         for (i = 0;i < Q2HEADER_LUMPS;i++)
4915         {
4916                 int temp;
4917                 if (i == Q2LUMP_ENTITIES)
4918                         continue;
4919                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
4920                 mod->brush.qw_md4sum ^= LittleLong(temp);
4921                 if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
4922                         continue;
4923                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
4924         }
4925
4926         // many of these functions are identical to Q1 loaders, so we use those where possible
4927         Mod_Q1BSP_LoadEntities(&lumpsb[Q2LUMP_ENTITIES]);
4928         Mod_Q1BSP_LoadVertexes(&lumpsb[Q2LUMP_VERTEXES]);
4929         Mod_Q1BSP_LoadEdges(&lumpsb[Q2LUMP_EDGES]);
4930         Mod_Q1BSP_LoadSurfedges(&lumpsb[Q2LUMP_SURFEDGES]);
4931         Mod_Q2BSP_LoadLighting(&lumpsb[Q2LUMP_LIGHTING]);
4932         Mod_Q1BSP_LoadPlanes(&lumpsb[Q2LUMP_PLANES]);
4933         Mod_Q2BSP_LoadTexinfo(&lumpsb[Q2LUMP_TEXINFO]);
4934         Mod_Q2BSP_LoadBrushSides(&lumpsb[Q2LUMP_BRUSHSIDES]);
4935         Mod_Q2BSP_LoadBrushes(&lumpsb[Q2LUMP_BRUSHES]);
4936         Mod_Q1BSP_LoadFaces(&lumpsb[Q2LUMP_FACES]);
4937         Mod_Q1BSP_LoadLeaffaces(&lumpsb[Q2LUMP_LEAFFACES]);
4938         Mod_Q2BSP_LoadLeafBrushes(&lumpsb[Q2LUMP_LEAFBRUSHES]);
4939         Mod_Q2BSP_LoadVisibility(&lumpsb[Q2LUMP_VISIBILITY]);
4940         Mod_Q2BSP_LoadPOP(&lumpsb[Q2LUMP_POP]);
4941         Mod_Q2BSP_LoadAreas(&lumpsb[Q2LUMP_AREAS]);
4942         Mod_Q2BSP_LoadAreaPortals(&lumpsb[Q2LUMP_AREAPORTALS]);
4943         Mod_Q2BSP_LoadLeafs(&lumpsb[Q2LUMP_LEAFS]);
4944         Mod_Q2BSP_LoadNodes(&lumpsb[Q2LUMP_NODES]);
4945         Mod_BSP_LoadSubmodels(&lumpsb[Q2LUMP_MODELS], NULL);
4946
4947         for (i = 0; i < Q2HEADER_LUMPS; i++)
4948                 if (lumpsb[i].readcount != lumpsb[i].cursize)
4949                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4950
4951         // we don't actually set MATERIALFLAG_WATERALPHA on anything, so this
4952         // doesn't enable the cvar, just indicates that transparent water is OK
4953         loadmodel->brush.supportwateralpha = true;
4954
4955         // we don't need the compressed pvs data anymore
4956         if (mod->brushq1.data_compressedpvs)
4957                 Mem_Free(mod->brushq1.data_compressedpvs);
4958         mod->brushq1.data_compressedpvs = NULL;
4959         mod->brushq1.num_compressedpvs = 0;
4960
4961         // the MakePortals code works fine on the q2bsp data as well
4962         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
4963                 Mod_BSP_MakePortals();
4964
4965         mod->numframes = 0;             // q2bsp animations are kind of special, frame is unbounded...
4966         mod->numskins = 1;
4967
4968         if (loadmodel->brush.numsubmodels)
4969                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4970
4971         totalstylesurfaces = 0;
4972         totalstyles = 0;
4973         for (i = 0;i < mod->brush.numsubmodels;i++)
4974         {
4975                 memset(stylecounts, 0, sizeof(stylecounts));
4976                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4977                 {
4978                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4979                         for (j = 0;j < MAXLIGHTMAPS;j++)
4980                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4981                 }
4982                 for (k = 0;k < 255;k++)
4983                 {
4984                         totalstyles++;
4985                         if (stylecounts[k])
4986                                 totalstylesurfaces += stylecounts[k];
4987                 }
4988         }
4989         // bones_was_here: using a separate allocation for model_brush_lightstyleinfo_t
4990         // because on a 64-bit machine it no longer has the same alignment requirement as int.
4991         lsidatapointer = Mem_AllocType(mod->mempool, model_brush_lightstyleinfo_t, totalstyles * sizeof(model_brush_lightstyleinfo_t));
4992         datapointer = Mem_AllocType(mod->mempool, int, mod->num_surfaces * sizeof(int) + totalstylesurfaces * sizeof(int));
4993         mod->modelsurfaces_sorted = datapointer; datapointer += mod->num_surfaces;
4994         // set up the world model, then on each submodel copy from the world model
4995         // and set up the submodel with the respective model info.
4996         mod = loadmodel;
4997         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
4998         {
4999                 mnode_t *rootnode = NULL;
5000                 int firstbrush = loadmodel->brush.num_brushes, lastbrush = 0;
5001                 if (i > 0)
5002                 {
5003                         char name[10];
5004                         // duplicate the basic information
5005                         dpsnprintf(name, sizeof(name), "*%i", i);
5006                         mod = Mod_FindName(name, loadmodel->name);
5007                         // copy the base model to this one
5008                         *mod = *loadmodel;
5009                         // rename the clone back to its proper name
5010                         dp_strlcpy(mod->name, name, sizeof(mod->name));
5011                         mod->brush.parentmodel = loadmodel;
5012                         // textures and memory belong to the main model
5013                         mod->texturepool = NULL;
5014                         mod->mempool = NULL;
5015                         mod->brush.GetPVS = NULL;
5016                         mod->brush.FatPVS = NULL;
5017                         mod->brush.BoxTouchingPVS = NULL;
5018                         mod->brush.BoxTouchingLeafPVS = NULL;
5019                         mod->brush.BoxTouchingVisibleLeafs = NULL;
5020                         mod->brush.FindBoxClusters = NULL;
5021                         mod->brush.LightPoint = NULL;
5022                         mod->brush.AmbientSoundLevelsForPoint = NULL;
5023                 }
5024                 mod->brush.submodel = i;
5025                 if (loadmodel->brush.submodels)
5026                         loadmodel->brush.submodels[i] = mod;
5027
5028                 bm = &mod->brushq1.submodels[i];
5029
5030                 // we store the headnode (there's only one in Q2BSP) as if it were the first hull
5031                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
5032
5033                 mod->submodelsurfaces_start = bm->firstface;
5034                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
5035
5036                 // set node/leaf parents for this submodel
5037                 // note: if the root of this submodel is a leaf (headnode[0] < 0) then there is nothing to do...
5038                 // (this happens in base3.bsp)
5039                 if (bm->headnode[0] >= 0)
5040                         rootnode = mod->brush.data_nodes + bm->headnode[0];
5041                 else
5042                         rootnode = (mnode_t*)(mod->brush.data_leafs + -1 - bm->headnode[0]);
5043                 Mod_BSP_LoadNodes_RecursiveSetParent(rootnode, NULL);
5044
5045                 // make the model surface list (used by shadowing/lighting)
5046                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, rootnode, &firstbrush, &lastbrush);
5047                 if (firstbrush <= lastbrush)
5048                 {
5049                         mod->firstmodelbrush = firstbrush;
5050                         mod->nummodelbrushes = lastbrush + 1 - firstbrush;
5051                 }
5052                 else
5053                 {
5054                         mod->firstmodelbrush = 0;
5055                         mod->nummodelbrushes = 0;
5056                 }
5057
5058                 VectorCopy(bm->mins, mod->normalmins);
5059                 VectorCopy(bm->maxs, mod->normalmaxs);
5060                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
5061                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
5062                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
5063                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
5064                 modelradius = modelyawradius + modelradius * modelradius;
5065                 modelyawradius = sqrt(modelyawradius);
5066                 modelradius = sqrt(modelradius);
5067                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
5068                 mod->yawmins[2] = mod->normalmins[2];
5069                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
5070                 mod->yawmaxs[2] = mod->normalmaxs[2];
5071                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
5072                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
5073                 mod->radius = modelradius;
5074                 mod->radius2 = modelradius * modelradius;
5075
5076                 Mod_SetDrawSkyAndWater(mod);
5077
5078                 // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
5079                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
5080                 {
5081                         // build lightstyle update chains
5082                         // (used to rapidly mark lightmapupdateflags on many surfaces
5083                         // when d_lightstylevalue changes)
5084                         memset(stylecounts, 0, sizeof(stylecounts));
5085                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5086                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5087                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
5088                         mod->brushq1.num_lightstyles = 0;
5089                         for (k = 0;k < 255;k++)
5090                         {
5091                                 if (stylecounts[k])
5092                                 {
5093                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
5094                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
5095                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
5096                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = datapointer;datapointer += stylecounts[k];
5097                                         remapstyles[k] = mod->brushq1.num_lightstyles;
5098                                         mod->brushq1.num_lightstyles++;
5099                                 }
5100                         }
5101                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5102                         {
5103                                 surface = mod->data_surfaces + k;
5104                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5105                                 {
5106                                         if (surface->lightmapinfo->styles[j] != 255)
5107                                         {
5108                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
5109                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
5110                                         }
5111                                 }
5112                         }
5113                         mod->brushq1.data_lightstyleinfo = lsidatapointer;lsidatapointer += mod->brushq1.num_lightstyles;
5114                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
5115                 }
5116                 else
5117                 {
5118                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
5119                 }
5120                 //mod->brushq1.num_visleafs = bm->visleafs;
5121
5122                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
5123                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
5124
5125                 // build a Bounding Interval Hierarchy for culling brushes in collision detection
5126                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
5127
5128                 // generate VBOs and other shared data before cloning submodels
5129                 if (i == 0)
5130                         Mod_BuildVBOs();
5131         }
5132         mod = loadmodel;
5133
5134         // make the model surface list (used by shadowing/lighting)
5135         Mod_MakeSortedSurfaces(loadmodel);
5136
5137         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);
5138 }
5139
5140 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents);
5141 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents);
5142
5143 static void Mod_Q3BSP_LoadEntities(lump_t *l)
5144 {
5145         const char *data;
5146         char key[128], value[MAX_INPUTLINE];
5147         float v[3];
5148         loadmodel->brushq3.num_lightgrid_cellsize[0] = 64;
5149         loadmodel->brushq3.num_lightgrid_cellsize[1] = 64;
5150         loadmodel->brushq3.num_lightgrid_cellsize[2] = 128;
5151         if (!l->filelen)
5152                 return;
5153         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
5154         memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
5155         loadmodel->brush.entities[l->filelen] = 0;
5156         data = loadmodel->brush.entities;
5157         // some Q3 maps override the lightgrid_cellsize with a worldspawn key
5158         // VorteX: q3map2 FS-R generates tangentspace deluxemaps for q3bsp and sets 'deluxeMaps' key
5159         loadmodel->brushq3.deluxemapping = false;
5160         if (data && COM_ParseToken_Simple(&data, false, false, true) && com_token[0] == '{')
5161         {
5162                 while (1)
5163                 {
5164                         if (!COM_ParseToken_Simple(&data, false, false, true))
5165                                 break; // error
5166                         if (com_token[0] == '}')
5167                                 break; // end of worldspawn
5168                         if (com_token[0] == '_')
5169                                 dp_strlcpy(key, com_token + 1, sizeof(key));
5170                         else
5171                                 dp_strlcpy(key, com_token, sizeof(key));
5172                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
5173                                 key[strlen(key)-1] = 0;
5174                         if (!COM_ParseToken_Simple(&data, false, false, true))
5175                                 break; // error
5176                         dp_strlcpy(value, com_token, sizeof(value));
5177                         if (!strcasecmp("gridsize", key)) // this one is case insensitive to 100% match q3map2
5178                         {
5179 #if _MSC_VER >= 1400
5180 #define sscanf sscanf_s
5181 #endif
5182 #if 0
5183                                 if (sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) == 3 && v[0] != 0 && v[1] != 0 && v[2] != 0)
5184                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5185 #else
5186                                 VectorSet(v, 64, 64, 128);
5187                                 if(sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) != 3)
5188                                         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]);
5189                                 if (v[0] != 0 && v[1] != 0 && v[2] != 0)
5190                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5191 #endif
5192                         }
5193                         else if (!strcmp("deluxeMaps", key))
5194                         {
5195                                 if (!strcmp(com_token, "1"))
5196                                 {
5197                                         loadmodel->brushq3.deluxemapping = true;
5198                                         loadmodel->brushq3.deluxemapping_modelspace = true;
5199                                 }
5200                                 else if (!strcmp(com_token, "2"))
5201                                 {
5202                                         loadmodel->brushq3.deluxemapping = true;
5203                                         loadmodel->brushq3.deluxemapping_modelspace = false;
5204                                 }
5205                         }
5206                 }
5207         }
5208 }
5209
5210 static void Mod_Q3BSP_LoadTextures(lump_t *l)
5211 {
5212         q3dtexture_t *in;
5213         texture_t *out;
5214         int i, count;
5215
5216         in = (q3dtexture_t *)(mod_base + l->fileofs);
5217         if (l->filelen % sizeof(*in))
5218                 Host_Error("Mod_Q3BSP_LoadTextures: funny lump size in %s",loadmodel->name);
5219         count = l->filelen / sizeof(*in);
5220         out = (texture_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5221
5222         loadmodel->data_textures = out;
5223         loadmodel->num_textures = count;
5224         loadmodel->num_texturesperskin = loadmodel->num_textures;
5225
5226         for (i = 0;i < count;i++)
5227         {
5228                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5229                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5230                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, out + i, in[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
5231                 // restore the surfaceflags and supercontents
5232                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5233                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5234         }
5235 }
5236
5237 static void Mod_Q3BSP_LoadPlanes(lump_t *l)
5238 {
5239         q3dplane_t *in;
5240         mplane_t *out;
5241         int i, count;
5242
5243         in = (q3dplane_t *)(mod_base + l->fileofs);
5244         if (l->filelen % sizeof(*in))
5245                 Host_Error("Mod_Q3BSP_LoadPlanes: funny lump size in %s",loadmodel->name);
5246         count = l->filelen / sizeof(*in);
5247         out = (mplane_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5248
5249         loadmodel->brush.data_planes = out;
5250         loadmodel->brush.num_planes = count;
5251
5252         for (i = 0;i < count;i++, in++, out++)
5253         {
5254                 out->normal[0] = LittleFloat(in->normal[0]);
5255                 out->normal[1] = LittleFloat(in->normal[1]);
5256                 out->normal[2] = LittleFloat(in->normal[2]);
5257                 out->dist = LittleFloat(in->dist);
5258                 PlaneClassify(out);
5259         }
5260 }
5261
5262 static void Mod_Q3BSP_LoadBrushSides(lump_t *l)
5263 {
5264         q3dbrushside_t *in;
5265         q3mbrushside_t *out;
5266         int i, n, count;
5267
5268         in = (q3dbrushside_t *)(mod_base + l->fileofs);
5269         if (l->filelen % sizeof(*in))
5270                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5271         count = l->filelen / sizeof(*in);
5272         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5273
5274         loadmodel->brush.data_brushsides = out;
5275         loadmodel->brush.num_brushsides = count;
5276
5277         for (i = 0;i < count;i++, in++, out++)
5278         {
5279                 n = LittleLong(in->planeindex);
5280                 if (n < 0 || n >= loadmodel->brush.num_planes)
5281                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5282                 out->plane = loadmodel->brush.data_planes + n;
5283                 n = LittleLong(in->textureindex);
5284                 if (n < 0 || n >= loadmodel->num_textures)
5285                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5286                 out->texture = loadmodel->data_textures + n;
5287         }
5288 }
5289
5290 static void Mod_Q3BSP_LoadBrushSides_IG(lump_t *l)
5291 {
5292         q3dbrushside_ig_t *in;
5293         q3mbrushside_t *out;
5294         int i, n, count;
5295
5296         in = (q3dbrushside_ig_t *)(mod_base + l->fileofs);
5297         if (l->filelen % sizeof(*in))
5298                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5299         count = l->filelen / sizeof(*in);
5300         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5301
5302         loadmodel->brush.data_brushsides = out;
5303         loadmodel->brush.num_brushsides = count;
5304
5305         for (i = 0;i < count;i++, in++, out++)
5306         {
5307                 n = LittleLong(in->planeindex);
5308                 if (n < 0 || n >= loadmodel->brush.num_planes)
5309                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5310                 out->plane = loadmodel->brush.data_planes + n;
5311                 n = LittleLong(in->textureindex);
5312                 if (n < 0 || n >= loadmodel->num_textures)
5313                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5314                 out->texture = loadmodel->data_textures + n;
5315         }
5316 }
5317
5318 static void Mod_Q3BSP_LoadBrushes(lump_t *l)
5319 {
5320         q3dbrush_t *in;
5321         q3mbrush_t *out;
5322         int i, j, n, c, count, maxplanes, q3surfaceflags;
5323         colplanef_t *planes;
5324
5325         in = (q3dbrush_t *)(mod_base + l->fileofs);
5326         if (l->filelen % sizeof(*in))
5327                 Host_Error("Mod_Q3BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
5328         count = l->filelen / sizeof(*in);
5329         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5330
5331         loadmodel->brush.data_brushes = out;
5332         loadmodel->brush.num_brushes = count;
5333
5334         maxplanes = 0;
5335         planes = NULL;
5336
5337         for (i = 0;i < count;i++, in++, out++)
5338         {
5339                 n = LittleLong(in->firstbrushside);
5340                 c = LittleLong(in->numbrushsides);
5341                 if (n < 0 || n + c > loadmodel->brush.num_brushsides)
5342                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", n, n + c, loadmodel->brush.num_brushsides);
5343                 out->firstbrushside = loadmodel->brush.data_brushsides + n;
5344                 out->numbrushsides = c;
5345                 n = LittleLong(in->textureindex);
5346                 if (n < 0 || n >= loadmodel->num_textures)
5347                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5348                 out->texture = loadmodel->data_textures + n;
5349
5350                 // make a list of mplane_t structs to construct a colbrush from
5351                 if (maxplanes < out->numbrushsides)
5352                 {
5353                         maxplanes = out->numbrushsides;
5354                         if (planes)
5355                                 Mem_Free(planes);
5356                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
5357                 }
5358                 q3surfaceflags = 0;
5359                 for (j = 0;j < out->numbrushsides;j++)
5360                 {
5361                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
5362                         planes[j].dist = out->firstbrushside[j].plane->dist;
5363                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
5364                         planes[j].texture = out->firstbrushside[j].texture;
5365                         q3surfaceflags |= planes[j].q3surfaceflags;
5366                 }
5367                 // make the colbrush from the planes
5368                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
5369
5370                 // this whole loop can take a while (e.g. on redstarrepublic4)
5371                 CL_KeepaliveMessage(false);
5372         }
5373         if (planes)
5374                 Mem_Free(planes);
5375 }
5376
5377 static void Mod_Q3BSP_LoadEffects(lump_t *l)
5378 {
5379         q3deffect_t *in;
5380         q3deffect_t *out;
5381         int i, n, count;
5382
5383         in = (q3deffect_t *)(mod_base + l->fileofs);
5384         if (l->filelen % sizeof(*in))
5385                 Host_Error("Mod_Q3BSP_LoadEffects: funny lump size in %s",loadmodel->name);
5386         count = l->filelen / sizeof(*in);
5387         out = (q3deffect_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5388
5389         loadmodel->brushq3.data_effects = out;
5390         loadmodel->brushq3.num_effects = count;
5391
5392         for (i = 0;i < count;i++, in++, out++)
5393         {
5394                 dp_strlcpy (out->shadername, in->shadername, sizeof (out->shadername));
5395                 n = LittleLong(in->brushindex);
5396                 if (n >= loadmodel->brush.num_brushes)
5397                 {
5398                         Con_Printf("Mod_Q3BSP_LoadEffects: invalid brushindex %i (%i brushes), setting to -1\n", n, loadmodel->brush.num_brushes);
5399                         n = -1;
5400                 }
5401                 out->brushindex = n;
5402                 out->unknown = LittleLong(in->unknown);
5403         }
5404 }
5405
5406 static void Mod_Q3BSP_LoadVertices(lump_t *l)
5407 {
5408         q3dvertex_t *in;
5409         int i, count;
5410
5411         in = (q3dvertex_t *)(mod_base + l->fileofs);
5412         if (l->filelen % sizeof(*in))
5413                 Host_Error("Mod_Q3BSP_LoadVertices: funny lump size in %s",loadmodel->name);
5414         loadmodel->brushq3.num_vertices = count = l->filelen / sizeof(*in);
5415         loadmodel->brushq3.data_vertex3f = (float *)Mem_Alloc(loadmodel->mempool, count * (sizeof(float) * (3 + 3 + 2 + 2 + 4)));
5416         loadmodel->brushq3.data_normal3f = loadmodel->brushq3.data_vertex3f + count * 3;
5417         loadmodel->brushq3.data_texcoordtexture2f = loadmodel->brushq3.data_normal3f + count * 3;
5418         loadmodel->brushq3.data_texcoordlightmap2f = loadmodel->brushq3.data_texcoordtexture2f + count * 2;
5419         loadmodel->brushq3.data_color4f = loadmodel->brushq3.data_texcoordlightmap2f + count * 2;
5420
5421         for (i = 0;i < count;i++, in++)
5422         {
5423                 loadmodel->brushq3.data_vertex3f[i * 3 + 0] = LittleFloat(in->origin3f[0]);
5424                 loadmodel->brushq3.data_vertex3f[i * 3 + 1] = LittleFloat(in->origin3f[1]);
5425                 loadmodel->brushq3.data_vertex3f[i * 3 + 2] = LittleFloat(in->origin3f[2]);
5426                 loadmodel->brushq3.data_normal3f[i * 3 + 0] = LittleFloat(in->normal3f[0]);
5427                 loadmodel->brushq3.data_normal3f[i * 3 + 1] = LittleFloat(in->normal3f[1]);
5428                 loadmodel->brushq3.data_normal3f[i * 3 + 2] = LittleFloat(in->normal3f[2]);
5429                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 0] = LittleFloat(in->texcoord2f[0]);
5430                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 1] = LittleFloat(in->texcoord2f[1]);
5431                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 0] = LittleFloat(in->lightmap2f[0]);
5432                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 1] = LittleFloat(in->lightmap2f[1]);
5433                 // svector/tvector are calculated later in face loading
5434                 if(mod_q3bsp_sRGBlightmaps.integer)
5435                 {
5436                         // if lightmaps are sRGB, vertex colors are sRGB too, so we need to linearize them
5437                         // note: when this is in use, lightmap color 128 is no longer neutral, but "sRGB half power" is
5438                         // working like this may be odd, but matches q3map2 -gamma 2.2
5439                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5440                         {
5441                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5442                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5443                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5444                                 // we fix the brightness consistently via lightmapscale
5445                         }
5446                         else
5447                         {
5448                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_LinearFloatFromsRGB(in->color4ub[0]);
5449                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_LinearFloatFromsRGB(in->color4ub[1]);
5450                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_LinearFloatFromsRGB(in->color4ub[2]);
5451                         }
5452                 }
5453                 else
5454                 {
5455                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5456                         {
5457                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[0]);
5458                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[1]);
5459                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[2]);
5460                         }
5461                         else
5462                         {
5463                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5464                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5465                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5466                         }
5467                 }
5468                 loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
5469                 if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
5470                         loadmodel->lit = true;
5471         }
5472 }
5473
5474 static void Mod_Q3BSP_LoadTriangles(lump_t *l)
5475 {
5476         int *in;
5477         int *out;
5478         int i, count;
5479
5480         in = (int *)(mod_base + l->fileofs);
5481         if (l->filelen % sizeof(int[3]))
5482                 Host_Error("Mod_Q3BSP_LoadTriangles: funny lump size in %s",loadmodel->name);
5483         count = l->filelen / sizeof(*in);
5484
5485         if(!loadmodel->brushq3.num_vertices)
5486         {
5487                 if (count)
5488                         Con_Printf("Mod_Q3BSP_LoadTriangles: %s has triangles but no vertexes, broken compiler, ignoring problem\n", loadmodel->name);
5489                 loadmodel->brushq3.num_triangles = 0;
5490                 return;
5491         }
5492
5493         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5494         loadmodel->brushq3.num_triangles = count / 3;
5495         loadmodel->brushq3.data_element3i = out;
5496
5497         for (i = 0;i < count;i++, in++, out++)
5498         {
5499                 *out = LittleLong(*in);
5500                 if (*out < 0 || *out >= loadmodel->brushq3.num_vertices)
5501                 {
5502                         Con_Printf("Mod_Q3BSP_LoadTriangles: invalid vertexindex %i (%i vertices), setting to 0\n", *out, loadmodel->brushq3.num_vertices);
5503                         *out = 0;
5504                 }
5505         }
5506 }
5507
5508 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
5509 {
5510         q3dlightmap_t *input_pointer;
5511         int i;
5512         int j;
5513         int k;
5514         int count;
5515         int powerx;
5516         int powery;
5517         int powerxy;
5518         int powerdxy;
5519         int endlightmap;
5520         int mergegoal;
5521         int lightmapindex;
5522         int realcount;
5523         int realindex;
5524         int mergedwidth;
5525         int mergedheight;
5526         int mergedcolumns;
5527         int mergedrows;
5528         int mergedrowsxcolumns;
5529         int size;
5530         int bytesperpixel;
5531         int rgbmap[3];
5532         unsigned char *c;
5533         unsigned char *mergedpixels;
5534         unsigned char *mergeddeluxepixels;
5535         unsigned char *mergebuf;
5536         char mapname[MAX_QPATH];
5537         qbool external;
5538         unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
5539         char vabuf[1024];
5540
5541         // defaults for q3bsp
5542         size = 128;
5543         bytesperpixel = 3;
5544         rgbmap[0] = 2;
5545         rgbmap[1] = 1;
5546         rgbmap[2] = 0;
5547         external = false;
5548         loadmodel->brushq3.lightmapsize = 128;
5549
5550         if (cls.state == ca_dedicated)
5551                 return;
5552
5553         if(mod_q3bsp_nolightmaps.integer)
5554         {
5555                 return;
5556         }
5557         else if(l->filelen)
5558         {
5559                 // prefer internal LMs for compatibility (a BSP contains no info on whether external LMs exist)
5560                 if (developer_loading.integer)
5561                         Con_Printf("Using internal lightmaps\n");
5562                 input_pointer = (q3dlightmap_t *)(mod_base + l->fileofs);
5563                 if (l->filelen % sizeof(*input_pointer))
5564                         Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
5565                 count = l->filelen / sizeof(*input_pointer);
5566                 for(i = 0; i < count; ++i)
5567                         inpixels[i] = input_pointer[i].rgb;
5568         }
5569         else
5570         {
5571                 // no internal lightmaps
5572                 // try external lightmaps
5573                 FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
5574                 inpixels[0] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, 0), false, false, false, NULL);
5575                 if(!inpixels[0])
5576                         return;
5577                 else
5578                         Con_Printf("Using external lightmaps\n");
5579
5580                 // using EXTERNAL lightmaps instead
5581                 if(image_width != (int) CeilPowerOf2(image_width) || image_width != image_height)
5582                         Con_Printf("Mod_Q3BSP_LoadLightmaps: irregularly sized external lightmap in %s",loadmodel->name);
5583
5584                 size = image_width;
5585                 bytesperpixel = 4;
5586                 rgbmap[0] = 0;
5587                 rgbmap[1] = 1;
5588                 rgbmap[2] = 2;
5589                 external = true;
5590
5591                 for(count = 1; ; ++count)
5592                 {
5593                         inpixels[count] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, count), false, false, false, NULL);
5594                         if(!inpixels[count])
5595                                 break; // we got all of them
5596                         if(image_width != size || image_height != size)
5597                         {
5598                                 Mem_Free(inpixels[count]);
5599                                 inpixels[count] = NULL;
5600                                 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);
5601                                 break;
5602                         }
5603                 }
5604         }
5605
5606         loadmodel->brushq3.lightmapsize = size;
5607         loadmodel->brushq3.num_originallightmaps = count;
5608
5609         // now check the surfaces to see if any of them index an odd numbered
5610         // lightmap, if so this is not a deluxemapped bsp file
5611         //
5612         // also check what lightmaps are actually used, because q3map2 sometimes
5613         // (always?) makes an unused one at the end, which
5614         // q3map2 sometimes (or always?) makes a second blank lightmap for no
5615         // reason when only one lightmap is used, which can throw off the
5616         // deluxemapping detection method, so check 2-lightmap bsp's specifically
5617         // to see if the second lightmap is blank, if so it is not deluxemapped.
5618         // VorteX: autodetect only if previous attempt to find "deluxeMaps" key
5619         // in Mod_Q3BSP_LoadEntities was failed
5620         if (!loadmodel->brushq3.deluxemapping)
5621         {
5622                 loadmodel->brushq3.deluxemapping = !(count & 1);
5623                 loadmodel->brushq3.deluxemapping_modelspace = true;
5624                 endlightmap = 0;
5625                 if (loadmodel->brushq3.deluxemapping)
5626                 {
5627                         int facecount = faceslump->filelen / sizeof(q3dface_t);
5628                         q3dface_t *faces = (q3dface_t *)(mod_base + faceslump->fileofs);
5629                         for (i = 0;i < facecount;i++)
5630                         {
5631                                 j = LittleLong(faces[i].lightmapindex);
5632                                 if (j >= 0)
5633                                 {
5634                                         endlightmap = max(endlightmap, j + 1);
5635                                         if ((j & 1) || j + 1 >= count)
5636                                         {
5637                                                 loadmodel->brushq3.deluxemapping = false;
5638                                                 break;
5639                                         }
5640                                 }
5641                         }
5642                 }
5643
5644                 // q3map2 sometimes (or always?) makes a second blank lightmap for no
5645                 // reason when only one lightmap is used, which can throw off the
5646                 // deluxemapping detection method, so check 2-lightmap bsp's specifically
5647                 // to see if the second lightmap is blank, if so it is not deluxemapped.
5648                 //
5649                 // further research has shown q3map2 sometimes creates a deluxemap and two
5650                 // blank lightmaps, which must be handled properly as well
5651                 if (endlightmap == 1 && count > 1)
5652                 {
5653                         c = inpixels[1];
5654                         for (i = 0;i < size*size;i++)
5655                         {
5656                                 if (c[bytesperpixel*i + rgbmap[0]])
5657                                         break;
5658                                 if (c[bytesperpixel*i + rgbmap[1]])
5659                                         break;
5660                                 if (c[bytesperpixel*i + rgbmap[2]])
5661                                         break;
5662                         }
5663                         if (i == size*size)
5664                         {
5665                                 // all pixels in the unused lightmap were black...
5666                                 loadmodel->brushq3.deluxemapping = false;
5667                         }
5668                 }
5669         }
5670
5671         Con_Printf("%s is %sdeluxemapped\n", loadmodel->name, loadmodel->brushq3.deluxemapping ? "" : "not ");
5672
5673         // figure out what the most reasonable merge power is within limits
5674
5675         // find the appropriate NxN dimensions to merge to, to avoid wasted space
5676         realcount = count >> (int)loadmodel->brushq3.deluxemapping;
5677
5678         // figure out how big the merged texture has to be
5679         mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
5680         mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
5681         while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
5682                 mergegoal /= 2;
5683         mergedwidth = mergegoal;
5684         mergedheight = mergegoal;
5685         // choose non-square size (2x1 aspect) if only half the space is used;
5686         // this really only happens when the entire set fits in one texture, if
5687         // there are multiple textures, we don't worry about shrinking the last
5688         // one to fit, because the driver prefers the same texture size on
5689         // consecutive draw calls...
5690         if (mergedwidth * mergedheight / 2 >= size*size*realcount)
5691                 mergedheight /= 2;
5692
5693         loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
5694         loadmodel->brushq3.num_lightmapmergedheightpower = 0;
5695         while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
5696                 loadmodel->brushq3.num_lightmapmergedwidthpower++;
5697         while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
5698                 loadmodel->brushq3.num_lightmapmergedheightpower++;
5699         loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
5700
5701         powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
5702         powery = loadmodel->brushq3.num_lightmapmergedheightpower;
5703         powerxy = powerx+powery;
5704         powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
5705
5706         mergedcolumns = 1 << powerx;
5707         mergedrows = 1 << powery;
5708         mergedrowsxcolumns = 1 << powerxy;
5709
5710         loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
5711         loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5712         if (loadmodel->brushq3.deluxemapping)
5713                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5714
5715         mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
5716         mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
5717         for (i = 0;i < count;i++)
5718         {
5719                 // figure out which merged lightmap texture this fits into
5720                 realindex = i >> (int)loadmodel->brushq3.deluxemapping;
5721                 lightmapindex = i >> powerdxy;
5722
5723                 // choose the destination address
5724                 mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
5725                 mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
5726                 if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
5727                         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);
5728
5729                 // convert pixels from RGB or BGRA while copying them into the destination rectangle
5730                 for (j = 0;j < size;j++)
5731                 for (k = 0;k < size;k++)
5732                 {
5733                         mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
5734                         mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
5735                         mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
5736                         mergebuf[(j*mergedwidth+k)*4+3] = 255;
5737                 }
5738
5739                 // upload texture if this was the last tile being written to the texture
5740                 if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
5741                 {
5742                         if (loadmodel->brushq3.deluxemapping && (i & 1))
5743                                 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);
5744                         else
5745                         {
5746                                 if(mod_q3bsp_sRGBlightmaps.integer)
5747                                 {
5748                                         textype_t t;
5749                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5750                                         {
5751                                                 t = TEXTYPE_BGRA; // in stupid fallback mode, we upload lightmaps in sRGB form and just fix their brightness
5752                                                 // we fix the brightness consistently via lightmapscale
5753                                         }
5754                                         else
5755                                                 t = TEXTYPE_SRGB_BGRA; // normally, we upload lightmaps in sRGB form (possibly downconverted to linear)
5756                                         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);
5757                                 }
5758                                 else
5759                                 {
5760                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5761                                                 Image_MakesRGBColorsFromLinear_Lightmap(mergedpixels, mergedpixels, mergedwidth * mergedheight);
5762                                         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);
5763                                 }
5764                         }
5765                 }
5766         }
5767
5768         if (mergeddeluxepixels)
5769                 Mem_Free(mergeddeluxepixels);
5770         Mem_Free(mergedpixels);
5771         if(external)
5772         {
5773                 for(i = 0; i < count; ++i)
5774                         Mem_Free(inpixels[i]);
5775         }
5776 }
5777
5778 typedef struct patchtess_s
5779 {
5780         patchinfo_t info;
5781
5782         // Auxiliary data used only by patch loading code in Mod_Q3BSP_LoadFaces
5783         int surface_id;
5784         float lodgroup[6];
5785         float *originalvertex3f;
5786 } patchtess_t;
5787
5788 #define PATCHTESS_SAME_LODGROUP(a,b) \
5789         ( \
5790                 (a).lodgroup[0] == (b).lodgroup[0] && \
5791                 (a).lodgroup[1] == (b).lodgroup[1] && \
5792                 (a).lodgroup[2] == (b).lodgroup[2] && \
5793                 (a).lodgroup[3] == (b).lodgroup[3] && \
5794                 (a).lodgroup[4] == (b).lodgroup[4] && \
5795                 (a).lodgroup[5] == (b).lodgroup[5] \
5796         )
5797
5798 static void Mod_Q3BSP_LoadFaces(lump_t *l)
5799 {
5800         q3dface_t *in, *oldin;
5801         msurface_t *out, *oldout;
5802         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;
5803         float lightmaptcbase[2], lightmaptcscale[2];
5804         //int *originalelement3i;
5805         float *originalvertex3f;
5806         //float *originalsvector3f;
5807         //float *originaltvector3f;
5808         float *originalnormal3f;
5809         float *originalcolor4f;
5810         float *originaltexcoordtexture2f;
5811         float *originaltexcoordlightmap2f;
5812         float *surfacecollisionvertex3f;
5813         int *surfacecollisionelement3i;
5814         float *v;
5815         patchtess_t *patchtess = NULL;
5816         int patchtesscount = 0;
5817         qbool again;
5818
5819         in = (q3dface_t *)(mod_base + l->fileofs);
5820         if (l->filelen % sizeof(*in))
5821                 Host_Error("Mod_Q3BSP_LoadFaces: funny lump size in %s",loadmodel->name);
5822         count = l->filelen / sizeof(*in);
5823         out = (msurface_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5824
5825         loadmodel->data_surfaces = out;
5826         loadmodel->num_surfaces = count;
5827
5828         if(count > 0)
5829                 patchtess = (patchtess_t*) Mem_Alloc(tempmempool, count * sizeof(*patchtess));
5830
5831         i = 0;
5832         oldi = i;
5833         oldin = in;
5834         oldout = out;
5835         meshvertices = 0;
5836         meshtriangles = 0;
5837         for (;i < count;i++, in++, out++)
5838         {
5839                 // check face type first
5840                 type = LittleLong(in->type);
5841                 if (type != Q3FACETYPE_FLAT
5842                  && type != Q3FACETYPE_PATCH
5843                  && type != Q3FACETYPE_MESH
5844                  && type != Q3FACETYPE_FLARE)
5845                 {
5846                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: unknown face type %i\n", i, type);
5847                         continue;
5848                 }
5849
5850                 n = LittleLong(in->textureindex);
5851                 if (n < 0 || n >= loadmodel->num_textures)
5852                 {
5853                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: invalid textureindex %i (%i textures)\n", i, n, loadmodel->num_textures);
5854                         continue;
5855                 }
5856                 out->texture = loadmodel->data_textures + n;
5857                 n = LittleLong(in->effectindex);
5858                 if (n < -1 || n >= loadmodel->brushq3.num_effects)
5859                 {
5860                         if (developer_extra.integer)
5861                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid effectindex %i (%i effects)\n", i, out->texture->name, n, loadmodel->brushq3.num_effects);
5862                         n = -1;
5863                 }
5864                 if (n == -1)
5865                         out->effect = NULL;
5866                 else
5867                         out->effect = loadmodel->brushq3.data_effects + n;
5868
5869                 if (cls.state != ca_dedicated)
5870                 {
5871                         out->lightmaptexture = NULL;
5872                         out->deluxemaptexture = r_texture_blanknormalmap;
5873                         n = LittleLong(in->lightmapindex);
5874                         if (n < 0)
5875                                 n = -1;
5876                         else if (n >= loadmodel->brushq3.num_originallightmaps)
5877                         {
5878                                 if(loadmodel->brushq3.num_originallightmaps != 0)
5879                                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
5880                                 n = -1;
5881                         }
5882                         else
5883                         {
5884                                 out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5885                                 if (loadmodel->brushq3.deluxemapping)
5886                                         out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5887                                 loadmodel->lit = true;
5888                         }
5889                 }
5890
5891                 firstvertex = LittleLong(in->firstvertex);
5892                 numvertices = LittleLong(in->numvertices);
5893                 firstelement = LittleLong(in->firstelement);
5894                 numtriangles = LittleLong(in->numelements) / 3;
5895                 if (numtriangles * 3 != LittleLong(in->numelements))
5896                 {
5897                         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));
5898                         continue;
5899                 }
5900                 if (firstvertex < 0 || firstvertex + numvertices > loadmodel->brushq3.num_vertices)
5901                 {
5902                         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);
5903                         continue;
5904                 }
5905                 if (firstelement < 0 || firstelement + numtriangles * 3 > loadmodel->brushq3.num_triangles * 3)
5906                 {
5907                         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);
5908                         continue;
5909                 }
5910                 switch(type)
5911                 {
5912                 case Q3FACETYPE_FLAT:
5913                 case Q3FACETYPE_MESH:
5914                         // no processing necessary
5915                         break;
5916                 case Q3FACETYPE_PATCH:
5917                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
5918                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
5919                         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)))
5920                         {
5921                                 Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid patchsize %ix%i\n", i, out->texture->name, patchsize[0], patchsize[1]);
5922                                 continue;
5923                         }
5924                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
5925
5926                         // convert patch to Q3FACETYPE_MESH
5927                         xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5928                         ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5929                         // bound to user settings
5930                         xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
5931                         ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
5932                         // bound to sanity settings
5933                         xtess = bound(0, xtess, 1024);
5934                         ytess = bound(0, ytess, 1024);
5935
5936                         // lower quality collision patches! Same procedure as before, but different cvars
5937                         // convert patch to Q3FACETYPE_MESH
5938                         cxtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, mod_q3bsp_curves_subdivisions_tolerance.value);
5939                         cytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, mod_q3bsp_curves_subdivisions_tolerance.value);
5940                         // bound to user settings
5941                         cxtess = bound(mod_q3bsp_curves_subdivisions_mintess.integer, cxtess, mod_q3bsp_curves_subdivisions_maxtess.integer);
5942                         cytess = bound(mod_q3bsp_curves_subdivisions_mintess.integer, cytess, mod_q3bsp_curves_subdivisions_maxtess.integer);
5943                         // bound to sanity settings
5944                         cxtess = bound(0, cxtess, 1024);
5945                         cytess = bound(0, cytess, 1024);
5946
5947                         // store it for the LOD grouping step
5948                         patchtess[patchtesscount].info.xsize = patchsize[0];
5949                         patchtess[patchtesscount].info.ysize = patchsize[1];
5950                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].xtess = xtess;
5951                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].ytess = ytess;
5952                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].xtess = cxtess;
5953                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].ytess = cytess;
5954
5955                         patchtess[patchtesscount].surface_id = i;
5956                         patchtess[patchtesscount].lodgroup[0] = LittleFloat(in->specific.patch.mins[0]);
5957                         patchtess[patchtesscount].lodgroup[1] = LittleFloat(in->specific.patch.mins[1]);
5958                         patchtess[patchtesscount].lodgroup[2] = LittleFloat(in->specific.patch.mins[2]);
5959                         patchtess[patchtesscount].lodgroup[3] = LittleFloat(in->specific.patch.maxs[0]);
5960                         patchtess[patchtesscount].lodgroup[4] = LittleFloat(in->specific.patch.maxs[1]);
5961                         patchtess[patchtesscount].lodgroup[5] = LittleFloat(in->specific.patch.maxs[2]);
5962                         patchtess[patchtesscount].originalvertex3f = originalvertex3f;
5963                         ++patchtesscount;
5964                         break;
5965                 case Q3FACETYPE_FLARE:
5966                         if (developer_extra.integer)
5967                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): Q3FACETYPE_FLARE not supported (yet)\n", i, out->texture->name);
5968                         // don't render it
5969                         continue;
5970                 }
5971                 out->num_vertices = numvertices;
5972                 out->num_triangles = numtriangles;
5973                 meshvertices += out->num_vertices;
5974                 meshtriangles += out->num_triangles;
5975         }
5976
5977         // Fix patches tesselations so that they make no seams
5978         do
5979         {
5980                 again = false;
5981                 for(i = 0; i < patchtesscount; ++i)
5982                 {
5983                         for(j = i+1; j < patchtesscount; ++j)
5984                         {
5985                                 if (!PATCHTESS_SAME_LODGROUP(patchtess[i], patchtess[j]))
5986                                         continue;
5987
5988                                 if (Q3PatchAdjustTesselation(3, &patchtess[i].info, patchtess[i].originalvertex3f, &patchtess[j].info, patchtess[j].originalvertex3f) )
5989                                         again = true;
5990                         }
5991                 }
5992         }
5993         while (again);
5994
5995         // Calculate resulting number of triangles
5996         collisionvertices = 0;
5997         collisiontriangles = 0;
5998         for(i = 0; i < patchtesscount; ++i)
5999         {
6000                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
6001                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_VISUAL].ytess);
6002                 numvertices = finalwidth * finalheight;
6003                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6004
6005                 oldout[patchtess[i].surface_id].num_vertices = numvertices;
6006                 oldout[patchtess[i].surface_id].num_triangles = numtriangles;
6007                 meshvertices += oldout[patchtess[i].surface_id].num_vertices;
6008                 meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
6009
6010                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_COLLISION].xtess);
6011                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_COLLISION].ytess);
6012                 numvertices = finalwidth * finalheight;
6013                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6014
6015                 oldout[patchtess[i].surface_id].num_collisionvertices = numvertices;
6016                 oldout[patchtess[i].surface_id].num_collisiontriangles = numtriangles;
6017                 collisionvertices += oldout[patchtess[i].surface_id].num_collisionvertices;
6018                 collisiontriangles += oldout[patchtess[i].surface_id].num_collisiontriangles;
6019         }
6020
6021         i = oldi;
6022         in = oldin;
6023         out = oldout;
6024         Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true);
6025         if (collisiontriangles)
6026         {
6027                 loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
6028                 loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
6029         }
6030         meshvertices = 0;
6031         meshtriangles = 0;
6032         collisionvertices = 0;
6033         collisiontriangles = 0;
6034         for (;i < count && meshvertices + out->num_vertices <= loadmodel->surfmesh.num_vertices;i++, in++, out++)
6035         {
6036                 if (out->num_vertices < 3 || out->num_triangles < 1)
6037                         continue;
6038
6039                 type = LittleLong(in->type);
6040                 firstvertex = LittleLong(in->firstvertex);
6041                 firstelement = LittleLong(in->firstelement);
6042                 out->num_firstvertex = meshvertices;
6043                 out->num_firsttriangle = meshtriangles;
6044                 out->num_firstcollisiontriangle = collisiontriangles;
6045                 switch(type)
6046                 {
6047                 case Q3FACETYPE_FLAT:
6048                 case Q3FACETYPE_MESH:
6049                         // no processing necessary, except for lightmap merging
6050                         for (j = 0;j < out->num_vertices;j++)
6051                         {
6052                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 0];
6053                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 1];
6054                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 2];
6055                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 0];
6056                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 1];
6057                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 2];
6058                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 0];
6059                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 1];
6060                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 0];
6061                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 1];
6062                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 0] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 0];
6063                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 1] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 1];
6064                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 2] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 2];
6065                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 3] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 3];
6066                         }
6067                         for (j = 0;j < out->num_triangles*3;j++)
6068                                 (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = loadmodel->brushq3.data_element3i[firstelement + j] + out->num_firstvertex;
6069                         break;
6070                 case Q3FACETYPE_PATCH:
6071                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
6072                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
6073                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
6074                         originalnormal3f = loadmodel->brushq3.data_normal3f + firstvertex * 3;
6075                         originaltexcoordtexture2f = loadmodel->brushq3.data_texcoordtexture2f + firstvertex * 2;
6076                         originaltexcoordlightmap2f = loadmodel->brushq3.data_texcoordlightmap2f + firstvertex * 2;
6077                         originalcolor4f = loadmodel->brushq3.data_color4f + firstvertex * 4;
6078
6079                         xtess = ytess = cxtess = cytess = -1;
6080                         for(j = 0; j < patchtesscount; ++j)
6081                                 if(patchtess[j].surface_id == i)
6082                                 {
6083                                         xtess = patchtess[j].info.lods[PATCH_LOD_VISUAL].xtess;
6084                                         ytess = patchtess[j].info.lods[PATCH_LOD_VISUAL].ytess;
6085                                         cxtess = patchtess[j].info.lods[PATCH_LOD_COLLISION].xtess;
6086                                         cytess = patchtess[j].info.lods[PATCH_LOD_COLLISION].ytess;
6087                                         break;
6088                                 }
6089                         if(xtess == -1)
6090                         {
6091                                 Con_Printf(CON_ERROR "ERROR: patch %d isn't preprocessed?!?\n", i);
6092                                 xtess = ytess = cxtess = cytess = 0;
6093                         }
6094
6095                         finalwidth = Q3PatchDimForTess(patchsize[0],xtess); //((patchsize[0] - 1) * xtess) + 1;
6096                         finalheight = Q3PatchDimForTess(patchsize[1],ytess); //((patchsize[1] - 1) * ytess) + 1;
6097                         finalvertices = finalwidth * finalheight;
6098                         oldnumtriangles = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6099                         type = Q3FACETYPE_MESH;
6100                         // generate geometry
6101                         // (note: normals are skipped because they get recalculated)
6102                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, xtess, ytess);
6103                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalnormal3f, xtess, ytess);
6104                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordtexture2f, xtess, ytess);
6105                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordlightmap2f, xtess, ytess);
6106                         Q3PatchTesselateFloat(4, sizeof(float[4]), (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[4]), originalcolor4f, xtess, ytess);
6107                         Q3PatchTriangleElements((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), finalwidth, finalheight, out->num_firstvertex);
6108
6109                         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);
6110
6111                         if (developer_extra.integer)
6112                         {
6113                                 if (out->num_triangles < finaltriangles)
6114                                         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);
6115                                 else
6116                                         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);
6117                         }
6118                         // q3map does not put in collision brushes for curves... ugh
6119                         // build the lower quality collision geometry
6120                         finalwidth = Q3PatchDimForTess(patchsize[0],cxtess); //((patchsize[0] - 1) * cxtess) + 1;
6121                         finalheight = Q3PatchDimForTess(patchsize[1],cytess); //((patchsize[1] - 1) * cytess) + 1;
6122                         finalvertices = finalwidth * finalheight;
6123                         oldnumtriangles2 = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6124
6125                         // store collision geometry for BIH collision tree
6126                         out->num_collisionvertices = finalvertices;
6127                         out->num_collisiontriangles = finaltriangles;
6128                         surfacecollisionvertex3f = loadmodel->brush.data_collisionvertex3f + collisionvertices * 3;
6129                         surfacecollisionelement3i = loadmodel->brush.data_collisionelement3i + collisiontriangles * 3;
6130                         Q3PatchTesselateFloat(3, sizeof(float[3]), surfacecollisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
6131                         Q3PatchTriangleElements(surfacecollisionelement3i, finalwidth, finalheight, collisionvertices);
6132                         Mod_SnapVertices(3, finalvertices, surfacecollisionvertex3f, 1);
6133                         out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, surfacecollisionelement3i, surfacecollisionelement3i, loadmodel->brush.data_collisionvertex3f);
6134
6135                         if (developer_extra.integer)
6136                                 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);
6137
6138                         collisionvertices += finalvertices;
6139                         collisiontriangles += out->num_collisiontriangles;
6140                         break;
6141                 default:
6142                         break;
6143                 }
6144                 meshvertices += out->num_vertices;
6145                 meshtriangles += out->num_triangles;
6146                 for (j = 0, invalidelements = 0;j < out->num_triangles * 3;j++)
6147                         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)
6148                                 invalidelements++;
6149                 if (invalidelements)
6150                 {
6151                         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);
6152                         for (j = 0;j < out->num_triangles * 3;j++)
6153                         {
6154                                 Con_Printf(" %i", (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] - out->num_firstvertex);
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                                         (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = out->num_firstvertex;
6157                         }
6158                         Con_Print("\n");
6159                 }
6160                 // calculate a bounding box
6161                 VectorClear(out->mins);
6162                 VectorClear(out->maxs);
6163                 if (out->num_vertices)
6164                 {
6165                         if (cls.state != ca_dedicated && out->lightmaptexture)
6166                         {
6167                                 // figure out which part of the merged lightmap this fits into
6168                                 int lightmapindex = LittleLong(in->lightmapindex) >> (loadmodel->brushq3.deluxemapping ? 1 : 0);
6169                                 int mergewidth = R_TextureWidth(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6170                                 int mergeheight = R_TextureHeight(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6171                                 lightmapindex &= mergewidth * mergeheight - 1;
6172                                 lightmaptcscale[0] = 1.0f / mergewidth;
6173                                 lightmaptcscale[1] = 1.0f / mergeheight;
6174                                 lightmaptcbase[0] = (lightmapindex % mergewidth) * lightmaptcscale[0];
6175                                 lightmaptcbase[1] = (lightmapindex / mergewidth) * lightmaptcscale[1];
6176                                 // modify the lightmap texcoords to match this region of the merged lightmap
6177                                 for (j = 0, v = loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex;j < out->num_vertices;j++, v += 2)
6178                                 {
6179                                         v[0] = v[0] * lightmaptcscale[0] + lightmaptcbase[0];
6180                                         v[1] = v[1] * lightmaptcscale[1] + lightmaptcbase[1];
6181                                 }
6182                         }
6183                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->mins);
6184                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->maxs);
6185                         for (j = 1, v = (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex) + 3;j < out->num_vertices;j++, v += 3)
6186                         {
6187                                 out->mins[0] = min(out->mins[0], v[0]);
6188                                 out->maxs[0] = max(out->maxs[0], v[0]);
6189                                 out->mins[1] = min(out->mins[1], v[1]);
6190                                 out->maxs[1] = max(out->maxs[1], v[1]);
6191                                 out->mins[2] = min(out->mins[2], v[2]);
6192                                 out->maxs[2] = max(out->maxs[2], v[2]);
6193                         }
6194                         out->mins[0] -= 1.0f;
6195                         out->mins[1] -= 1.0f;
6196                         out->mins[2] -= 1.0f;
6197                         out->maxs[0] += 1.0f;
6198                         out->maxs[1] += 1.0f;
6199                         out->maxs[2] += 1.0f;
6200                 }
6201                 // set lightmap styles for consistency with q1bsp
6202                 //out->lightmapinfo->styles[0] = 0;
6203                 //out->lightmapinfo->styles[1] = 255;
6204                 //out->lightmapinfo->styles[2] = 255;
6205                 //out->lightmapinfo->styles[3] = 255;
6206         }
6207
6208         i = oldi;
6209         out = oldout;
6210         for (;i < count;i++, out++)
6211         {
6212                 if(out->num_vertices && out->num_triangles)
6213                         continue;
6214                 if(out->num_vertices == 0)
6215                 {
6216                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6217                         if(out->num_triangles == 0)
6218                                 Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6219                 }
6220                 else if(out->num_triangles == 0)
6221                         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)",
6222                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
6223                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
6224                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
6225         }
6226
6227         // for per pixel lighting
6228         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);
6229
6230         // generate ushort elements array if possible
6231         if (loadmodel->surfmesh.data_element3s)
6232                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
6233                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
6234
6235         // free the no longer needed vertex data
6236         loadmodel->brushq3.num_vertices = 0;
6237         if (loadmodel->brushq3.data_vertex3f)
6238                 Mem_Free(loadmodel->brushq3.data_vertex3f);
6239         loadmodel->brushq3.data_vertex3f = NULL;
6240         loadmodel->brushq3.data_normal3f = NULL;
6241         loadmodel->brushq3.data_texcoordtexture2f = NULL;
6242         loadmodel->brushq3.data_texcoordlightmap2f = NULL;
6243         loadmodel->brushq3.data_color4f = NULL;
6244         // free the no longer needed triangle data
6245         loadmodel->brushq3.num_triangles = 0;
6246         if (loadmodel->brushq3.data_element3i)
6247                 Mem_Free(loadmodel->brushq3.data_element3i);
6248         loadmodel->brushq3.data_element3i = NULL;
6249
6250         if(patchtess)
6251                 Mem_Free(patchtess);
6252 }
6253
6254 static void Mod_Q3BSP_LoadModels(lump_t *l)
6255 {
6256         q3dmodel_t *in;
6257         q3dmodel_t *out;
6258         int i, j, n, c, count;
6259
6260         in = (q3dmodel_t *)(mod_base + l->fileofs);
6261         if (l->filelen % sizeof(*in))
6262                 Host_Error("Mod_Q3BSP_LoadModels: funny lump size in %s",loadmodel->name);
6263         count = l->filelen / sizeof(*in);
6264         out = (q3dmodel_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6265
6266         loadmodel->brushq3.data_models = out;
6267         loadmodel->brushq3.num_models = count;
6268
6269         for (i = 0;i < count;i++, in++, out++)
6270         {
6271                 for (j = 0;j < 3;j++)
6272                 {
6273                         out->mins[j] = LittleFloat(in->mins[j]);
6274                         out->maxs[j] = LittleFloat(in->maxs[j]);
6275                 }
6276                 n = LittleLong(in->firstface);
6277                 c = LittleLong(in->numfaces);
6278                 if (n < 0 || n + c > loadmodel->num_surfaces)
6279                         Host_Error("Mod_Q3BSP_LoadModels: invalid face range %i : %i (%i faces)", n, n + c, loadmodel->num_surfaces);
6280                 out->firstface = n;
6281                 out->numfaces = c;
6282                 n = LittleLong(in->firstbrush);
6283                 c = LittleLong(in->numbrushes);
6284                 if (n < 0 || n + c > loadmodel->brush.num_brushes)
6285                         Host_Error("Mod_Q3BSP_LoadModels: invalid brush range %i : %i (%i brushes)", n, n + c, loadmodel->brush.num_brushes);
6286                 out->firstbrush = n;
6287                 out->numbrushes = c;
6288         }
6289 }
6290
6291 static void Mod_Q3BSP_LoadLeafBrushes(lump_t *l)
6292 {
6293         int *in;
6294         int *out;
6295         int i, n, count;
6296
6297         in = (int *)(mod_base + l->fileofs);
6298         if (l->filelen % sizeof(*in))
6299                 Host_Error("Mod_Q3BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
6300         count = l->filelen / sizeof(*in);
6301         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6302
6303         loadmodel->brush.data_leafbrushes = out;
6304         loadmodel->brush.num_leafbrushes = count;
6305
6306         for (i = 0;i < count;i++, in++, out++)
6307         {
6308                 n = LittleLong(*in);
6309                 if (n < 0 || n >= loadmodel->brush.num_brushes)
6310                         Host_Error("Mod_Q3BSP_LoadLeafBrushes: invalid brush index %i (%i brushes)", n, loadmodel->brush.num_brushes);
6311                 *out = n;
6312         }
6313 }
6314
6315 static void Mod_Q3BSP_LoadLeafFaces(lump_t *l)
6316 {
6317         int *in;
6318         int *out;
6319         int i, n, count;
6320
6321         in = (int *)(mod_base + l->fileofs);
6322         if (l->filelen % sizeof(*in))
6323                 Host_Error("Mod_Q3BSP_LoadLeafFaces: funny lump size in %s",loadmodel->name);
6324         count = l->filelen / sizeof(*in);
6325         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6326
6327         loadmodel->brush.data_leafsurfaces = out;
6328         loadmodel->brush.num_leafsurfaces = count;
6329
6330         for (i = 0;i < count;i++, in++, out++)
6331         {
6332                 n = LittleLong(*in);
6333                 if (n < 0 || n >= loadmodel->num_surfaces)
6334                         Host_Error("Mod_Q3BSP_LoadLeafFaces: invalid face index %i (%i faces)", n, loadmodel->num_surfaces);
6335                 *out = n;
6336         }
6337 }
6338
6339 static void Mod_Q3BSP_LoadLeafs(lump_t *l)
6340 {
6341         q3dleaf_t *in;
6342         mleaf_t *out;
6343         int i, j, n, c, count;
6344
6345         in = (q3dleaf_t *)(mod_base + l->fileofs);
6346         if (l->filelen % sizeof(*in))
6347                 Host_Error("Mod_Q3BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
6348         count = l->filelen / sizeof(*in);
6349         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6350
6351         loadmodel->brush.data_leafs = out;
6352         loadmodel->brush.num_leafs = count;
6353
6354         for (i = 0;i < count;i++, in++, out++)
6355         {
6356                 out->parent = NULL;
6357                 out->plane = NULL;
6358                 out->clusterindex = LittleLong(in->clusterindex);
6359                 out->areaindex = LittleLong(in->areaindex);
6360                 for (j = 0;j < 3;j++)
6361                 {
6362                         // yes the mins/maxs are ints
6363                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6364                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6365                 }
6366                 n = LittleLong(in->firstleafface);
6367                 c = LittleLong(in->numleaffaces);
6368                 if (n < 0 || n + c > loadmodel->brush.num_leafsurfaces)
6369                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafsurface range %i : %i (%i leafsurfaces)", n, n + c, loadmodel->brush.num_leafsurfaces);
6370                 out->firstleafsurface = loadmodel->brush.data_leafsurfaces + n;
6371                 out->numleafsurfaces = c;
6372                 n = LittleLong(in->firstleafbrush);
6373                 c = LittleLong(in->numleafbrushes);
6374                 if (n < 0 || n + c > loadmodel->brush.num_leafbrushes)
6375                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafbrush range %i : %i (%i leafbrushes)", n, n + c, loadmodel->brush.num_leafbrushes);
6376                 out->firstleafbrush = loadmodel->brush.data_leafbrushes + n;
6377                 out->numleafbrushes = c;
6378         }
6379 }
6380
6381 static void Mod_Q3BSP_LoadNodes(lump_t *l)
6382 {
6383         q3dnode_t *in;
6384         mnode_t *out;
6385         int i, j, n, count;
6386
6387         in = (q3dnode_t *)(mod_base + l->fileofs);
6388         if (l->filelen % sizeof(*in))
6389                 Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
6390         count = l->filelen / sizeof(*in);
6391         if (count == 0)
6392                 Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
6393         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6394
6395         loadmodel->brush.data_nodes = out;
6396         loadmodel->brush.num_nodes = count;
6397
6398         for (i = 0;i < count;i++, in++, out++)
6399         {
6400                 out->parent = NULL;
6401                 n = LittleLong(in->planeindex);
6402                 if (n < 0 || n >= loadmodel->brush.num_planes)
6403                         Host_Error("Mod_Q3BSP_LoadNodes: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
6404                 out->plane = loadmodel->brush.data_planes + n;
6405                 for (j = 0;j < 2;j++)
6406                 {
6407                         n = LittleLong(in->childrenindex[j]);
6408                         if (n >= 0)
6409                         {
6410                                 if (n >= loadmodel->brush.num_nodes)
6411                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child node index %i (%i nodes)", n, loadmodel->brush.num_nodes);
6412                                 out->children[j] = loadmodel->brush.data_nodes + n;
6413                         }
6414                         else
6415                         {
6416                                 n = -1 - n;
6417                                 if (n >= loadmodel->brush.num_leafs)
6418                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child leaf index %i (%i leafs)", n, loadmodel->brush.num_leafs);
6419                                 out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + n);
6420                         }
6421                 }
6422                 for (j = 0;j < 3;j++)
6423                 {
6424                         // yes the mins/maxs are ints
6425                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6426                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6427                 }
6428         }
6429
6430         // set the parent pointers
6431         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);
6432 }
6433
6434 static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
6435 {
6436         q3dlightgrid_t *in;
6437         q3dlightgrid_t *out;
6438         int count;
6439         int i;
6440         int texturesize[3];
6441         unsigned char *texturergba, *texturelayer[3], *texturepadding[2];
6442         double lightgridmatrix[4][4];
6443
6444         in = (q3dlightgrid_t *)(mod_base + l->fileofs);
6445         if (l->filelen % sizeof(*in))
6446                 Host_Error("Mod_Q3BSP_LoadLightGrid: funny lump size in %s",loadmodel->name);
6447         loadmodel->brushq3.num_lightgrid_scale[0] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[0];
6448         loadmodel->brushq3.num_lightgrid_scale[1] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[1];
6449         loadmodel->brushq3.num_lightgrid_scale[2] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[2];
6450         loadmodel->brushq3.num_lightgrid_imins[0] = (int)ceil(loadmodel->brushq3.data_models->mins[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6451         loadmodel->brushq3.num_lightgrid_imins[1] = (int)ceil(loadmodel->brushq3.data_models->mins[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6452         loadmodel->brushq3.num_lightgrid_imins[2] = (int)ceil(loadmodel->brushq3.data_models->mins[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6453         loadmodel->brushq3.num_lightgrid_imaxs[0] = (int)floor(loadmodel->brushq3.data_models->maxs[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6454         loadmodel->brushq3.num_lightgrid_imaxs[1] = (int)floor(loadmodel->brushq3.data_models->maxs[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6455         loadmodel->brushq3.num_lightgrid_imaxs[2] = (int)floor(loadmodel->brushq3.data_models->maxs[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6456         loadmodel->brushq3.num_lightgrid_isize[0] = loadmodel->brushq3.num_lightgrid_imaxs[0] - loadmodel->brushq3.num_lightgrid_imins[0] + 1;
6457         loadmodel->brushq3.num_lightgrid_isize[1] = loadmodel->brushq3.num_lightgrid_imaxs[1] - loadmodel->brushq3.num_lightgrid_imins[1] + 1;
6458         loadmodel->brushq3.num_lightgrid_isize[2] = loadmodel->brushq3.num_lightgrid_imaxs[2] - loadmodel->brushq3.num_lightgrid_imins[2] + 1;
6459         count = loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2];
6460         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]);
6461         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]);
6462
6463         // if lump is empty there is nothing to load, we can deal with that in the LightPoint code
6464         if (l->filelen)
6465         {
6466                 if (l->filelen < count * (int)sizeof(*in))
6467                 {
6468                         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]);
6469                         return; // ignore the grid if we cannot understand it
6470                 }
6471                 if (l->filelen != count * (int)sizeof(*in))
6472                         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);
6473                 out = (q3dlightgrid_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6474                 loadmodel->brushq3.data_lightgrid = out;
6475                 loadmodel->brushq3.num_lightgrid = count;
6476                 // no swapping or validation necessary
6477                 memcpy(out, in, count * (int)sizeof(*out));
6478
6479                 if(mod_q3bsp_sRGBlightmaps.integer)
6480                 {
6481                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6482                         {
6483                                 // we fix the brightness consistently via lightmapscale
6484                         }
6485                         else
6486                         {
6487                                 for(i = 0; i < count; ++i)
6488                                 {
6489                                         out[i].ambientrgb[0] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6490                                         out[i].ambientrgb[1] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6491                                         out[i].ambientrgb[2] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6492                                         out[i].diffusergb[0] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[0]) * 255.0f + 0.5f);
6493                                         out[i].diffusergb[1] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[1]) * 255.0f + 0.5f);
6494                                         out[i].diffusergb[2] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[2]) * 255.0f + 0.5f);
6495                                 }
6496                         }
6497                 }
6498                 else
6499                 {
6500                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6501                         {
6502                                 for(i = 0; i < count; ++i)
6503                                 {
6504                                         out[i].ambientrgb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6505                                         out[i].ambientrgb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6506                                         out[i].ambientrgb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6507                                         out[i].diffusergb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[0]) * 255.0f + 0.5f);
6508                                         out[i].diffusergb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[1]) * 255.0f + 0.5f);
6509                                         out[i].diffusergb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[2]) * 255.0f + 0.5f);
6510                                 }
6511                         }
6512                         else
6513                         {
6514                                 // all is good
6515                         }
6516                 }
6517
6518                 if (mod_q3bsp_lightgrid_texture.integer)
6519                 {
6520                         // build a texture to hold the data for per-pixel sampling
6521                         // this has 3 different kinds of data stacked in it:
6522                         // ambient color
6523                         // bent-normal light color
6524                         // bent-normal light dir
6525
6526                         texturesize[0] = loadmodel->brushq3.num_lightgrid_isize[0];
6527                         texturesize[1] = loadmodel->brushq3.num_lightgrid_isize[1];
6528                         texturesize[2] = (loadmodel->brushq3.num_lightgrid_isize[2] + 2) * 3;
6529                         texturergba = (unsigned char*)Mem_Alloc(loadmodel->mempool, texturesize[0] * texturesize[1] * texturesize[2] * sizeof(char[4]));
6530                         texturelayer[0] = texturergba + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6531                         texturelayer[1] = texturelayer[0] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6532                         texturelayer[2] = texturelayer[1] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6533                         // the light dir layer needs padding above/below it that is a neutral unsigned normal (127,127,127,255)
6534                         texturepadding[0] = texturelayer[2] - loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6535                         texturepadding[1] = texturelayer[2] + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2] * 4;
6536                         for (i = 0; i < texturesize[0] * texturesize[1]; i++)
6537                         {
6538                                 texturepadding[0][i * 4] = texturepadding[1][i * 4] = 127;
6539                                 texturepadding[0][i * 4 + 1] = texturepadding[1][i * 4 + 1] = 127;
6540                                 texturepadding[0][i * 4 + 2] = texturepadding[1][i * 4 + 2] = 127;
6541                                 texturepadding[0][i * 4 + 3] = texturepadding[1][i * 4 + 3] = 255;
6542                         }
6543                         for (i = 0; i < count; i++)
6544                         {
6545                                 texturelayer[0][i * 4 + 0] = out[i].ambientrgb[0];
6546                                 texturelayer[0][i * 4 + 1] = out[i].ambientrgb[1];
6547                                 texturelayer[0][i * 4 + 2] = out[i].ambientrgb[2];
6548                                 texturelayer[0][i * 4 + 3] = 255;
6549                                 texturelayer[1][i * 4 + 0] = out[i].diffusergb[0];
6550                                 texturelayer[1][i * 4 + 1] = out[i].diffusergb[1];
6551                                 texturelayer[1][i * 4 + 2] = out[i].diffusergb[2];
6552                                 texturelayer[1][i * 4 + 3] = 255;
6553                                 // this uses the mod_md3_sin table because the values are
6554                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6555                                 // instead of a sine value
6556                                 texturelayer[2][i * 4 + 0] = (char)((mod_md3_sin[64 + out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6557                                 texturelayer[2][i * 4 + 1] = (char)((mod_md3_sin[out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6558                                 texturelayer[2][i * 4 + 2] = (char)((mod_md3_sin[64 + out[i].diffusepitch]) * 127 + 127);
6559                                 texturelayer[2][i * 4 + 3] = 255;
6560                         }
6561 #if 0
6562                         // debugging hack
6563                         int x, y, z;
6564                         for (z = 0; z < loadmodel->brushq3.num_lightgrid_isize[2]; z++)
6565                         {
6566                                 for (y = 0; y < loadmodel->brushq3.num_lightgrid_isize[1]; y++)
6567                                 {
6568                                         for (x = 0; x < loadmodel->brushq3.num_lightgrid_isize[0]; x++)
6569                                         {
6570                                                 i = (z * texturesize[1] + y) * texturesize[0] + x;
6571                                                 texturelayer[0][i * 4 + 0] = x * 256 / loadmodel->brushq3.num_lightgrid_isize[0];
6572                                                 texturelayer[0][i * 4 + 1] = y * 256 / loadmodel->brushq3.num_lightgrid_isize[1];
6573                                                 texturelayer[0][i * 4 + 2] = z * 256 / loadmodel->brushq3.num_lightgrid_isize[2];
6574                                         }
6575                                 }
6576                         }
6577 #endif
6578                         loadmodel->brushq3.lightgridtexturesize[0] = texturesize[0];
6579                         loadmodel->brushq3.lightgridtexturesize[1] = texturesize[1];
6580                         loadmodel->brushq3.lightgridtexturesize[2] = texturesize[2];
6581                         memset(lightgridmatrix[0], 0, sizeof(lightgridmatrix));
6582                         lightgridmatrix[0][0] = loadmodel->brushq3.num_lightgrid_scale[0] / texturesize[0];
6583                         lightgridmatrix[1][1] = loadmodel->brushq3.num_lightgrid_scale[1] / texturesize[1];
6584                         lightgridmatrix[2][2] = loadmodel->brushq3.num_lightgrid_scale[2] / texturesize[2];
6585                         lightgridmatrix[0][3] = -(loadmodel->brushq3.num_lightgrid_imins[0] - 0.5f) / texturesize[0];
6586                         lightgridmatrix[1][3] = -(loadmodel->brushq3.num_lightgrid_imins[1] - 0.5f) / texturesize[1];
6587                         lightgridmatrix[2][3] = -(loadmodel->brushq3.num_lightgrid_imins[2] - 1.5f) / texturesize[2];
6588                         lightgridmatrix[3][3] = 1;
6589                         Matrix4x4_FromArrayDoubleD3D(&loadmodel->brushq3.lightgridworldtotexturematrix, lightgridmatrix);
6590                         loadmodel->brushq3.lightgridtexture = R_LoadTexture3D(loadmodel->texturepool, "lightgrid", texturesize[0], texturesize[1], texturesize[2], texturergba, TEXTYPE_RGBA, TEXF_CLAMP, 0, NULL);
6591                         Mem_Free(texturergba);
6592                 }
6593         }
6594 }
6595
6596 static void Mod_Q3BSP_LoadPVS(lump_t *l)
6597 {
6598         q3dpvs_t *in;
6599         int totalchains;
6600
6601         if (l->filelen == 0)
6602         {
6603                 int i;
6604                 // unvised maps often have cluster indices even without pvs, so check
6605                 // leafs to find real number of clusters
6606                 loadmodel->brush.num_pvsclusters = 1;
6607                 for (i = 0;i < loadmodel->brush.num_leafs;i++)
6608                         loadmodel->brush.num_pvsclusters = max(loadmodel->brush.num_pvsclusters, loadmodel->brush.data_leafs[i].clusterindex + 1);
6609
6610                 // create clusters
6611                 loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters + 7) / 8;
6612                 totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6613                 loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6614                 memset(loadmodel->brush.data_pvsclusters, 0xFF, totalchains);
6615                 return;
6616         }
6617
6618         in = (q3dpvs_t *)(mod_base + l->fileofs);
6619         if (l->filelen < 9)
6620                 Host_Error("Mod_Q3BSP_LoadPVS: funny lump size in %s",loadmodel->name);
6621
6622         loadmodel->brush.num_pvsclusters = LittleLong(in->numclusters);
6623         loadmodel->brush.num_pvsclusterbytes = LittleLong(in->chainlength);
6624         if (loadmodel->brush.num_pvsclusterbytes < ((loadmodel->brush.num_pvsclusters + 7) / 8))
6625                 Host_Error("Mod_Q3BSP_LoadPVS: (chainlength = %i) < ((numclusters = %i) + 7) / 8", loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.num_pvsclusters);
6626         totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6627         if (l->filelen < totalchains + (int)sizeof(*in))
6628                 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);
6629
6630         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6631         memcpy(loadmodel->brush.data_pvsclusters, (unsigned char *)(in + 1), totalchains);
6632 }
6633
6634 static void Mod_Q3BSP_LightPoint(model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
6635 {
6636         int i, j, k, index[3];
6637         float transformed[3], blend1, blend2, blend, stylescale = 1;
6638         q3dlightgrid_t *a, *s;
6639
6640         // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
6641         // LadyHavoc: FIXME: is this true?
6642         stylescale = 1; // added while render
6643         //stylescale = r_refdef.scene.rtlightstylevalue[0];
6644
6645         if (!model->brushq3.num_lightgrid)
6646         {
6647                 ambientcolor[0] = stylescale;
6648                 ambientcolor[1] = stylescale;
6649                 ambientcolor[2] = stylescale;
6650                 return;
6651         }
6652
6653         Matrix4x4_Transform(&model->brushq3.num_lightgrid_indexfromworld, p, transformed);
6654         //Matrix4x4_Print(&model->brushq3.num_lightgrid_indexfromworld);
6655         //Con_Printf("%f %f %f transformed %f %f %f clamped ", p[0], p[1], p[2], transformed[0], transformed[1], transformed[2]);
6656         transformed[0] = bound(0, transformed[0], model->brushq3.num_lightgrid_isize[0] - 1);
6657         transformed[1] = bound(0, transformed[1], model->brushq3.num_lightgrid_isize[1] - 1);
6658         transformed[2] = bound(0, transformed[2], model->brushq3.num_lightgrid_isize[2] - 1);
6659         index[0] = (int)floor(transformed[0]);
6660         index[1] = (int)floor(transformed[1]);
6661         index[2] = (int)floor(transformed[2]);
6662         //Con_Printf("%f %f %f index %i %i %i:\n", transformed[0], transformed[1], transformed[2], index[0], index[1], index[2]);
6663
6664         // now lerp the values
6665         VectorClear(diffusenormal);
6666         a = &model->brushq3.data_lightgrid[(index[2] * model->brushq3.num_lightgrid_isize[1] + index[1]) * model->brushq3.num_lightgrid_isize[0] + index[0]];
6667         for (k = 0;k < 2;k++)
6668         {
6669                 blend1 = (k ? (transformed[2] - index[2]) : (1 - (transformed[2] - index[2])));
6670                 if (blend1 < 0.001f || index[2] + k >= model->brushq3.num_lightgrid_isize[2])
6671                         continue;
6672                 for (j = 0;j < 2;j++)
6673                 {
6674                         blend2 = blend1 * (j ? (transformed[1] - index[1]) : (1 - (transformed[1] - index[1])));
6675                         if (blend2 < 0.001f || index[1] + j >= model->brushq3.num_lightgrid_isize[1])
6676                                 continue;
6677                         for (i = 0;i < 2;i++)
6678                         {
6679                                 blend = blend2 * (i ? (transformed[0] - index[0]) : (1 - (transformed[0] - index[0]))) * stylescale;
6680                                 if (blend < 0.001f || index[0] + i >= model->brushq3.num_lightgrid_isize[0])
6681                                         continue;
6682                                 s = a + (k * model->brushq3.num_lightgrid_isize[1] + j) * model->brushq3.num_lightgrid_isize[0] + i;
6683                                 VectorMA(ambientcolor, blend * (1.0f / 128.0f), s->ambientrgb, ambientcolor);
6684                                 VectorMA(diffusecolor, blend * (1.0f / 128.0f), s->diffusergb, diffusecolor);
6685                                 // this uses the mod_md3_sin table because the values are
6686                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6687                                 // instead of a sine value
6688                                 diffusenormal[0] += blend * (mod_md3_sin[64 + s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6689                                 diffusenormal[1] += blend * (mod_md3_sin[     s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6690                                 diffusenormal[2] += blend * (mod_md3_sin[64 + s->diffusepitch]);
6691                                 //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)));
6692                         }
6693                 }
6694         }
6695
6696         // normalize the light direction before turning
6697         VectorNormalize(diffusenormal);
6698         //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]);
6699 }
6700
6701 static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3], double endpos[3])
6702 {
6703         double t1, t2;
6704         double midf, mid[3];
6705         int ret, side;
6706
6707         // check for empty
6708         while (node->plane)
6709         {
6710                 // find the point distances
6711                 mplane_t *plane = node->plane;
6712                 if (plane->type < 3)
6713                 {
6714                         t1 = p1[plane->type] - plane->dist;
6715                         t2 = p2[plane->type] - plane->dist;
6716                 }
6717                 else
6718                 {
6719                         t1 = DotProduct (plane->normal, p1) - plane->dist;
6720                         t2 = DotProduct (plane->normal, p2) - plane->dist;
6721                 }
6722
6723                 if (t1 < 0)
6724                 {
6725                         if (t2 < 0)
6726                         {
6727                                 node = node->children[1];
6728                                 continue;
6729                         }
6730                         side = 1;
6731                 }
6732                 else
6733                 {
6734                         if (t2 >= 0)
6735                         {
6736                                 node = node->children[0];
6737                                 continue;
6738                         }
6739                         side = 0;
6740                 }
6741
6742                 midf = t1 / (t1 - t2);
6743                 VectorLerp(p1, midf, p2, mid);
6744
6745                 // recurse both sides, front side first
6746                 // return 2 if empty is followed by solid (hit something)
6747                 // do not return 2 if both are solid or both empty,
6748                 // or if start is solid and end is empty
6749                 // as these degenerate cases usually indicate the eye is in solid and
6750                 // should see the target point anyway
6751                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid, endpos);
6752                 if (ret != 0)
6753                         return ret;
6754                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2, endpos);
6755                 if (ret != 1)
6756                         return ret;
6757                 VectorCopy(mid, endpos);
6758                 return 2;
6759         }
6760         return ((mleaf_t *)node)->clusterindex < 0;
6761 }
6762
6763 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)
6764 {
6765         if (model->brush.submodel || mod_q3bsp_tracelineofsight_brushes.integer)
6766         {
6767                 trace_t trace;
6768                 model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
6769                 return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
6770         }
6771         else
6772         {
6773                 double tracestart[3], traceend[3], traceendpos[3];
6774                 VectorCopy(start, tracestart);
6775                 VectorCopy(end, traceend);
6776                 VectorCopy(end, traceendpos);
6777                 Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend, traceendpos);
6778                 return BoxesOverlap(traceendpos, traceendpos, acceptmins, acceptmaxs);
6779         }
6780 }
6781
6782 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)
6783 {
6784         const bih_t *bih;
6785         const bih_leaf_t *leaf;
6786         const bih_node_t *node;
6787         const colbrushf_t *brush;
6788         int axis;
6789         int nodenum;
6790         int nodestackpos = 0;
6791         int nodestack[1024];
6792
6793         memset(trace, 0, sizeof(*trace));
6794         trace->fraction = 1;
6795         trace->hitsupercontentsmask = hitsupercontentsmask;
6796         trace->skipsupercontentsmask = skipsupercontentsmask;
6797         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6798
6799         bih = &model->collision_bih;
6800         if(!bih->nodes)
6801                 return;
6802
6803         nodenum = bih->rootnode;
6804         nodestack[nodestackpos++] = nodenum;
6805         while (nodestackpos)
6806         {
6807                 nodenum = nodestack[--nodestackpos];
6808                 node = bih->nodes + nodenum;
6809 #if 1
6810                 if (!BoxesOverlap(start, start, node->mins, node->maxs))
6811                         continue;
6812 #endif
6813                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6814                 {
6815                         axis = node->type - BIH_SPLITX;
6816                         if (start[axis] >= node->frontmin)
6817                                 nodestack[nodestackpos++] = node->front;
6818                         if (start[axis] <= node->backmax)
6819                                 nodestack[nodestackpos++] = node->back;
6820                 }
6821                 else if (node->type == BIH_UNORDERED)
6822                 {
6823                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6824                         {
6825                                 leaf = bih->leafs + node->children[axis];
6826 #if 1
6827                                 if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
6828                                         continue;
6829 #endif
6830                                 switch(leaf->type)
6831                                 {
6832                                 case BIH_BRUSH:
6833                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6834                                         Collision_TracePointBrushFloat(trace, start, brush);
6835                                         break;
6836                                 case BIH_COLLISIONTRIANGLE:
6837                                         // collision triangle - skipped because they have no volume
6838                                         break;
6839                                 case BIH_RENDERTRIANGLE:
6840                                         // render triangle - skipped because they have no volume
6841                                         break;
6842                                 }
6843                         }
6844                 }
6845         }
6846 }
6847
6848 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)
6849 {
6850         const bih_leaf_t *leaf;
6851         const bih_node_t *node;
6852         const colbrushf_t *brush;
6853         const int *e;
6854         const texture_t *texture;
6855         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6856         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6857         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6858
6859         if(!bih->nodes)
6860                 return;
6861
6862         if (VectorCompare(start, end))
6863         {
6864                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6865                 return;
6866         }
6867
6868         nodenum = bih->rootnode;
6869
6870         memset(trace, 0, sizeof(*trace));
6871         trace->fraction = 1;
6872         trace->hitsupercontentsmask = hitsupercontentsmask;
6873         trace->skipsupercontentsmask = skipsupercontentsmask;
6874         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6875
6876         // push first node
6877         nodestackline[nodestackpos][0] = start[0];
6878         nodestackline[nodestackpos][1] = start[1];
6879         nodestackline[nodestackpos][2] = start[2];
6880         nodestackline[nodestackpos][3] = end[0];
6881         nodestackline[nodestackpos][4] = end[1];
6882         nodestackline[nodestackpos][5] = end[2];
6883         nodestack[nodestackpos++] = nodenum;
6884         while (nodestackpos)
6885         {
6886                 nodenum = nodestack[--nodestackpos];
6887                 node = bih->nodes + nodenum;
6888                 VectorCopy(nodestackline[nodestackpos], nodestart);
6889                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
6890                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6891                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6892                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6893                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6894                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6895                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6896                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs) && !collision_bih_fullrecursion.integer)
6897                         continue;
6898                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6899                 {
6900                         // recurse children of the split
6901                         axis = node->type - BIH_SPLITX;
6902                         d1 = node->backmax - nodestart[axis];
6903                         d2 = node->backmax - nodeend[axis];
6904                         d3 = nodestart[axis] - node->frontmin;
6905                         d4 = nodeend[axis] - node->frontmin;
6906                         if (collision_bih_fullrecursion.integer)
6907                                 d1 = d2 = d3 = d4 = 1; // force full recursion
6908                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
6909                         {
6910                         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;
6911                         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;
6912                         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;
6913                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6914                         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;
6915                         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;
6916                         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;
6917                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6918                         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;
6919                         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;
6920                         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;
6921                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6922                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6923                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6924                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6925                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
6926                         }
6927                 }
6928                 else if (node->type == BIH_UNORDERED)
6929                 {
6930                         // calculate sweep bounds for this node
6931                         // copy node bounds into local variables
6932                         VectorCopy(node->mins, nodebigmins);
6933                         VectorCopy(node->maxs, nodebigmaxs);
6934                         // clip line to this node bounds
6935                         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); }
6936                         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); }
6937                         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); }
6938                         // some of the line intersected the enlarged node box
6939                         // calculate sweep bounds for this node
6940                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6941                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6942                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6943                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6944                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6945                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6946                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6947                         {
6948                                 leaf = bih->leafs + node->children[axis];
6949                                 // TODO: This is very expensive in Steel Storm. Framerate halved during even light combat.
6950                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
6951                                         continue;
6952                                 switch(leaf->type)
6953                                 {
6954                                 case BIH_BRUSH:
6955                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6956                                         Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
6957                                         break;
6958                                 case BIH_COLLISIONTRIANGLE:
6959                                         if (!mod_q3bsp_curves_collisions.integer)
6960                                                 continue;
6961                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
6962                                         texture = model->data_textures + leaf->textureindex;
6963                                         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);
6964                                         break;
6965                                 case BIH_RENDERTRIANGLE:
6966                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
6967                                         texture = model->data_textures + leaf->textureindex;
6968                                         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);
6969                                         break;
6970                                 }
6971                         }
6972                 }
6973         }
6974 }
6975
6976 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)
6977 {
6978         if (VectorCompare(start, end))
6979         {
6980                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6981                 return;
6982         }
6983         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->collision_bih);
6984 }
6985
6986 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)
6987 {
6988         const bih_t *bih;
6989         const bih_leaf_t *leaf;
6990         const bih_node_t *node;
6991         const colbrushf_t *brush;
6992         const int *e;
6993         const texture_t *texture;
6994         vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
6995         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6996         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6997         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6998
6999         if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
7000         {
7001                 if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
7002                         Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7003                 else
7004                         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7005                 return;
7006         }
7007
7008         bih = &model->collision_bih;
7009         if(!bih->nodes)
7010                 return;
7011         nodenum = bih->rootnode;
7012
7013         // box trace, performed as brush trace
7014         memset(trace, 0, sizeof(*trace));
7015         trace->fraction = 1;
7016         trace->hitsupercontentsmask = hitsupercontentsmask;
7017         trace->skipsupercontentsmask = skipsupercontentsmask;
7018         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7019
7020         // calculate tracebox-like parameters for efficient culling
7021         VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
7022         VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
7023         VectorSubtract(thisbrush_start->mins, start, startmins);
7024         VectorSubtract(thisbrush_start->maxs, start, startmaxs);
7025         VectorSubtract(thisbrush_end->mins, end, endmins);
7026         VectorSubtract(thisbrush_end->maxs, end, endmaxs);
7027         mins[0] = min(startmins[0], endmins[0]);
7028         mins[1] = min(startmins[1], endmins[1]);
7029         mins[2] = min(startmins[2], endmins[2]);
7030         maxs[0] = max(startmaxs[0], endmaxs[0]);
7031         maxs[1] = max(startmaxs[1], endmaxs[1]);
7032         maxs[2] = max(startmaxs[2], endmaxs[2]);
7033
7034         // push first node
7035         nodestackline[nodestackpos][0] = start[0];
7036         nodestackline[nodestackpos][1] = start[1];
7037         nodestackline[nodestackpos][2] = start[2];
7038         nodestackline[nodestackpos][3] = end[0];
7039         nodestackline[nodestackpos][4] = end[1];
7040         nodestackline[nodestackpos][5] = end[2];
7041         nodestack[nodestackpos++] = nodenum;
7042         while (nodestackpos)
7043         {
7044                 nodenum = nodestack[--nodestackpos];
7045                 node = bih->nodes + nodenum;
7046                 VectorCopy(nodestackline[nodestackpos], nodestart);
7047                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
7048                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7049                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7050                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7051                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7052                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7053                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7054                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
7055                         continue;
7056                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
7057                 {
7058                         // recurse children of the split
7059                         axis = node->type - BIH_SPLITX;
7060                         d1 = node->backmax - nodestart[axis] - mins[axis];
7061                         d2 = node->backmax - nodeend[axis] - mins[axis];
7062                         d3 = nodestart[axis] - node->frontmin + maxs[axis];
7063                         d4 = nodeend[axis] - node->frontmin + maxs[axis];
7064                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
7065                         {
7066                         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;
7067                         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;
7068                         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;
7069                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7070                         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;
7071                         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;
7072                         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;
7073                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7074                         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;
7075                         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;
7076                         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;
7077                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7078                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7079                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7080                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7081                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
7082                         }
7083                 }
7084                 else if (node->type == BIH_UNORDERED)
7085                 {
7086                         // calculate sweep bounds for this node
7087                         // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
7088                         VectorSubtract(node->mins, maxs, nodebigmins);
7089                         VectorSubtract(node->maxs, mins, nodebigmaxs);
7090                         // clip line to this node bounds
7091                         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); }
7092                         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); }
7093                         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); }
7094                         // some of the line intersected the enlarged node box
7095                         // calculate sweep bounds for this node
7096                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7097                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7098                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7099                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7100                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7101                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7102                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
7103                         {
7104                                 leaf = bih->leafs + node->children[axis];
7105                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
7106                                         continue;
7107                                 switch(leaf->type)
7108                                 {
7109                                 case BIH_BRUSH:
7110                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
7111                                         Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
7112                                         break;
7113                                 case BIH_COLLISIONTRIANGLE:
7114                                         if (!mod_q3bsp_curves_collisions.integer)
7115                                                 continue;
7116                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
7117                                         texture = model->data_textures + leaf->textureindex;
7118                                         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);
7119                                         break;
7120                                 case BIH_RENDERTRIANGLE:
7121                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
7122                                         texture = model->data_textures + leaf->textureindex;
7123                                         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);
7124                                         break;
7125                                 }
7126                         }
7127                 }
7128         }
7129 }
7130
7131 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)
7132 {
7133         colboxbrushf_t thisbrush_start, thisbrush_end;
7134         vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
7135
7136         // box trace, performed as brush trace
7137         VectorAdd(start, boxmins, boxstartmins);
7138         VectorAdd(start, boxmaxs, boxstartmaxs);
7139         VectorAdd(end, boxmins, boxendmins);
7140         VectorAdd(end, boxmaxs, boxendmaxs);
7141         Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
7142         Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
7143         Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7144 }
7145
7146
7147 int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
7148 {
7149         trace_t trace;
7150         Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0, 0, 0);
7151         return trace.startsupercontents;
7152 }
7153
7154 qbool Mod_CollisionBIH_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
7155 {
7156         trace_t trace;
7157         Mod_CollisionBIH_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
7158         return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
7159 }
7160
7161 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)
7162 {
7163 #if 0
7164         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7165         vec3_t end;
7166         int hitsupercontents;
7167         VectorSet(end, start[0], start[1], model->normalmins[2]);
7168 #endif
7169         memset(trace, 0, sizeof(*trace));
7170         trace->fraction = 1;
7171         trace->hitsupercontentsmask = hitsupercontentsmask;
7172         trace->skipsupercontentsmask = skipsupercontentsmask;
7173         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7174 #if 0
7175         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7176         hitsupercontents = trace->hitsupercontents;
7177         memset(trace, 0, sizeof(*trace));
7178         trace->fraction = 1;
7179         trace->hitsupercontentsmask = hitsupercontentsmask;
7180         trace->skipsupercontentsmask = skipsupercontentsmask;
7181         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7182         trace->startsupercontents = hitsupercontents;
7183 #endif
7184 }
7185
7186 int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, const vec3_t start)
7187 {
7188 #if 0
7189         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7190         trace_t trace;
7191         vec3_t end;
7192         VectorSet(end, start[0], start[1], model->normalmins[2]);
7193         memset(&trace, 0, sizeof(trace));
7194         trace.fraction = 1;
7195         trace.hitsupercontentsmask = hitsupercontentsmask;
7196         trace.skipsupercontentsmask = skipsupercontentsmask;
7197         trace.skipmaterialflagsmask = skipmaterialflagsmask;
7198         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7199         return trace.hitsupercontents;
7200 #else
7201         return 0;
7202 #endif
7203 }
7204
7205 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)
7206 {
7207         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->render_bih);
7208 }
7209
7210
7211 bih_t *Mod_MakeCollisionBIH(model_t *model, qbool userendersurfaces, bih_t *out)
7212 {
7213         int j;
7214         int bihnumleafs;
7215         int bihmaxnodes;
7216         int brushindex;
7217         int triangleindex;
7218         int bihleafindex;
7219         int nummodelbrushes = model->nummodelbrushes;
7220         const int *e;
7221         const int *collisionelement3i;
7222         const float *collisionvertex3f;
7223         const int *renderelement3i;
7224         const float *rendervertex3f;
7225         bih_leaf_t *bihleafs;
7226         bih_node_t *bihnodes;
7227         int *temp_leafsort;
7228         int *temp_leafsortscratch;
7229         const msurface_t *surface;
7230         const q3mbrush_t *brush;
7231
7232         // find out how many BIH leaf nodes we need
7233         bihnumleafs = 0;
7234         if (userendersurfaces)
7235         {
7236                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7237                         bihnumleafs += model->data_surfaces[j].num_triangles;
7238         }
7239         else
7240         {
7241                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7242                         if (brush->colbrushf)
7243                                 bihnumleafs++;
7244                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7245                 {
7246                         if (model->data_surfaces[j].texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
7247                                 bihnumleafs += model->data_surfaces[j].num_triangles + model->data_surfaces[j].num_collisiontriangles;
7248                         else
7249                                 bihnumleafs += model->data_surfaces[j].num_collisiontriangles;
7250                 }
7251         }
7252
7253         if (!bihnumleafs)
7254                 return NULL;
7255
7256         // allocate the memory for the BIH leaf nodes
7257         bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
7258
7259         // now populate the BIH leaf nodes
7260         bihleafindex = 0;
7261
7262         // add render surfaces
7263         renderelement3i = model->surfmesh.data_element3i;
7264         rendervertex3f = model->surfmesh.data_vertex3f;
7265         for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7266         {
7267                 surface = model->data_surfaces + j;
7268                 for (triangleindex = 0, e = renderelement3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
7269                 {
7270                         if (!userendersurfaces && !(surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS))
7271                                 continue;
7272                         bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
7273                         bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7274                         bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7275                         bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
7276                         bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
7277                         bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
7278                         bihleafs[bihleafindex].mins[2] = min(rendervertex3f[3*e[0]+2], min(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) - 1;
7279                         bihleafs[bihleafindex].maxs[0] = max(rendervertex3f[3*e[0]+0], max(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) + 1;
7280                         bihleafs[bihleafindex].maxs[1] = max(rendervertex3f[3*e[0]+1], max(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) + 1;
7281                         bihleafs[bihleafindex].maxs[2] = max(rendervertex3f[3*e[0]+2], max(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) + 1;
7282                         bihleafindex++;
7283                 }
7284         }
7285
7286         if (!userendersurfaces)
7287         {
7288                 // add collision brushes
7289                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7290                 {
7291                         if (!brush->colbrushf)
7292                                 continue;
7293                         bihleafs[bihleafindex].type = BIH_BRUSH;
7294                         bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
7295                         bihleafs[bihleafindex].surfaceindex = -1;
7296                         bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
7297                         VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
7298                         VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
7299                         bihleafindex++;
7300                 }
7301
7302                 // add collision surfaces
7303                 collisionelement3i = model->brush.data_collisionelement3i;
7304                 collisionvertex3f = model->brush.data_collisionvertex3f;
7305                 for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7306                 {
7307                         surface = model->data_surfaces + j;
7308                         for (triangleindex = 0, e = collisionelement3i + 3*surface->num_firstcollisiontriangle;triangleindex < surface->num_collisiontriangles;triangleindex++, e += 3)
7309                         {
7310                                 bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
7311                                 bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7312                                 bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7313                                 bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
7314                                 bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
7315                                 bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
7316                                 bihleafs[bihleafindex].mins[2] = min(collisionvertex3f[3*e[0]+2], min(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) - 1;
7317                                 bihleafs[bihleafindex].maxs[0] = max(collisionvertex3f[3*e[0]+0], max(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) + 1;
7318                                 bihleafs[bihleafindex].maxs[1] = max(collisionvertex3f[3*e[0]+1], max(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) + 1;
7319                                 bihleafs[bihleafindex].maxs[2] = max(collisionvertex3f[3*e[0]+2], max(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) + 1;
7320                                 bihleafindex++;
7321                         }
7322                 }
7323         }
7324
7325         // allocate buffers for the produced and temporary data
7326         bihmaxnodes = bihnumleafs + 1;
7327         bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
7328         temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
7329         temp_leafsortscratch = temp_leafsort + bihnumleafs;
7330
7331         // now build it
7332         BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
7333
7334         // we're done with the temporary data
7335         Mem_Free(temp_leafsort);
7336
7337         // resize the BIH nodes array if it over-allocated
7338         if (out->maxnodes > out->numnodes)
7339         {
7340                 out->maxnodes = out->numnodes;
7341                 out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
7342         }
7343
7344         return out;
7345 }
7346
7347 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents)
7348 {
7349         int supercontents = 0;
7350         if (nativecontents & CONTENTSQ3_SOLID)
7351                 supercontents |= SUPERCONTENTS_SOLID;
7352         if (nativecontents & CONTENTSQ3_WATER)
7353                 supercontents |= SUPERCONTENTS_WATER;
7354         if (nativecontents & CONTENTSQ3_SLIME)
7355                 supercontents |= SUPERCONTENTS_SLIME;
7356         if (nativecontents & CONTENTSQ3_LAVA)
7357                 supercontents |= SUPERCONTENTS_LAVA;
7358         if (nativecontents & CONTENTSQ3_BODY)
7359                 supercontents |= SUPERCONTENTS_BODY;
7360         if (nativecontents & CONTENTSQ3_CORPSE)
7361                 supercontents |= SUPERCONTENTS_CORPSE;
7362         if (nativecontents & CONTENTSQ3_NODROP)
7363                 supercontents |= SUPERCONTENTS_NODROP;
7364         if (nativecontents & CONTENTSQ3_PLAYERCLIP)
7365                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
7366         if (nativecontents & CONTENTSQ3_MONSTERCLIP)
7367                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
7368         if (nativecontents & CONTENTSQ3_DONOTENTER)
7369                 supercontents |= SUPERCONTENTS_DONOTENTER;
7370         if (nativecontents & CONTENTSQ3_BOTCLIP)
7371                 supercontents |= SUPERCONTENTS_BOTCLIP;
7372         if (!(nativecontents & CONTENTSQ3_TRANSLUCENT))
7373                 supercontents |= SUPERCONTENTS_OPAQUE;
7374         return supercontents;
7375 }
7376
7377 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents)
7378 {
7379         int nativecontents = 0;
7380         if (supercontents & SUPERCONTENTS_SOLID)
7381                 nativecontents |= CONTENTSQ3_SOLID;
7382         if (supercontents & SUPERCONTENTS_WATER)
7383                 nativecontents |= CONTENTSQ3_WATER;
7384         if (supercontents & SUPERCONTENTS_SLIME)
7385                 nativecontents |= CONTENTSQ3_SLIME;
7386         if (supercontents & SUPERCONTENTS_LAVA)
7387                 nativecontents |= CONTENTSQ3_LAVA;
7388         if (supercontents & SUPERCONTENTS_BODY)
7389                 nativecontents |= CONTENTSQ3_BODY;
7390         if (supercontents & SUPERCONTENTS_CORPSE)
7391                 nativecontents |= CONTENTSQ3_CORPSE;
7392         if (supercontents & SUPERCONTENTS_NODROP)
7393                 nativecontents |= CONTENTSQ3_NODROP;
7394         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
7395                 nativecontents |= CONTENTSQ3_PLAYERCLIP;
7396         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
7397                 nativecontents |= CONTENTSQ3_MONSTERCLIP;
7398         if (supercontents & SUPERCONTENTS_DONOTENTER)
7399                 nativecontents |= CONTENTSQ3_DONOTENTER;
7400         if (supercontents & SUPERCONTENTS_BOTCLIP)
7401                 nativecontents |= CONTENTSQ3_BOTCLIP;
7402         if (!(supercontents & SUPERCONTENTS_OPAQUE))
7403                 nativecontents |= CONTENTSQ3_TRANSLUCENT;
7404         return nativecontents;
7405 }
7406
7407 static void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
7408 {
7409         int numleafs;
7410         while (node->plane)
7411         {
7412                 Mod_Q3BSP_RecursiveFindNumLeafs(node->children[0]);
7413                 node = node->children[1];
7414         }
7415         numleafs = ((mleaf_t *)node - loadmodel->brush.data_leafs) + 1;
7416         if (loadmodel->brush.num_leafs < numleafs)
7417                 loadmodel->brush.num_leafs = numleafs;
7418 }
7419
7420 static void Mod_Q3BSP_Load(model_t *mod, void *buffer, void *bufferend)
7421 {
7422         int i, j, lumps;
7423         q3dheader_t *header;
7424         float corner[3], yawradius, modelradius;
7425
7426         mod->modeldatatypestring = "Q3BSP";
7427
7428         mod->type = mod_brushq3;
7429         mod->brush.ishlbsp = false;
7430         mod->brush.isbsp2rmqe = false;
7431         mod->brush.isbsp2 = false;
7432         mod->brush.isq2bsp = false;
7433         mod->brush.isq3bsp = true;
7434         mod->brush.skymasking = true;
7435         mod->numframes = 2; // although alternate textures are not supported it is annoying to complain about no such frame 1
7436         mod->numskins = 1;
7437
7438         header = (q3dheader_t *)buffer;
7439         if((char *) bufferend < (char *) buffer + sizeof(q3dheader_t))
7440                 Host_Error("Mod_Q3BSP_Load: %s is smaller than its header", mod->name);
7441
7442         i = LittleLong(header->version);
7443         if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG && i != Q3BSPVERSION_LIVE)
7444                 Host_Error("Mod_Q3BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q3BSPVERSION);
7445
7446         mod->soundfromcenter = true;
7447         mod->TraceBox = Mod_CollisionBIH_TraceBox;
7448         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
7449         mod->TraceLine = Mod_CollisionBIH_TraceLine;
7450         mod->TracePoint = Mod_CollisionBIH_TracePoint;
7451         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
7452         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
7453         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
7454         mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
7455         mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
7456         mod->brush.GetPVS = Mod_BSP_GetPVS;
7457         mod->brush.FatPVS = Mod_BSP_FatPVS;
7458         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
7459         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
7460         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
7461         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
7462         mod->brush.LightPoint = Mod_Q3BSP_LightPoint;
7463         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
7464         mod->brush.AmbientSoundLevelsForPoint = NULL;
7465         mod->brush.RoundUpToHullSize = NULL;
7466         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
7467         mod->Draw = R_Mod_Draw;
7468         mod->DrawDepth = R_Mod_DrawDepth;
7469         mod->DrawDebug = R_Mod_DrawDebug;
7470         mod->DrawPrepass = R_Mod_DrawPrepass;
7471         mod->GetLightInfo = R_Mod_GetLightInfo;
7472         mod->CompileShadowMap = R_Mod_CompileShadowMap;
7473         mod->DrawShadowMap = R_Mod_DrawShadowMap;
7474         mod->DrawLight = R_Mod_DrawLight;
7475
7476         mod_base = (unsigned char *)header;
7477
7478         // swap all the lumps
7479         header->ident = LittleLong(header->ident);
7480         header->version = LittleLong(header->version);
7481         lumps = (header->version == Q3BSPVERSION_LIVE) ? Q3HEADER_LUMPS_LIVE : Q3HEADER_LUMPS;
7482         for (i = 0;i < lumps;i++)
7483         {
7484                 j = (header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs));
7485                 if((char *) bufferend < (char *) buffer + j)
7486                         Host_Error("Mod_Q3BSP_Load: %s has a lump that starts outside the file!", mod->name);
7487                 j += (header->lumps[i].filelen = LittleLong(header->lumps[i].filelen));
7488                 if((char *) bufferend < (char *) buffer + j)
7489                         Host_Error("Mod_Q3BSP_Load: %s has a lump that ends outside the file!", mod->name);
7490         }
7491         /*
7492          * NO, do NOT clear them!
7493          * they contain actual data referenced by other stuff.
7494          * Instead, before using the advertisements lump, check header->versio
7495          * again!
7496          * Sorry, but otherwise it breaks memory of the first lump.
7497         for (i = lumps;i < Q3HEADER_LUMPS_MAX;i++)
7498         {
7499                 header->lumps[i].fileofs = 0;
7500                 header->lumps[i].filelen = 0;
7501         }
7502         */
7503
7504         mod->brush.qw_md4sum = 0;
7505         mod->brush.qw_md4sum2 = 0;
7506         for (i = 0;i < lumps;i++)
7507         {
7508                 if (i == Q3LUMP_ENTITIES)
7509                         continue;
7510                 mod->brush.qw_md4sum ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7511                 if (i == Q3LUMP_PVS || i == Q3LUMP_LEAFS || i == Q3LUMP_NODES)
7512                         continue;
7513                 mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7514
7515                 // all this checksumming can take a while, so let's send keepalives here too
7516                 CL_KeepaliveMessage(false);
7517         }
7518
7519         // allocate a texture pool if we need it
7520         if (mod->texturepool == NULL)
7521                 mod->texturepool = R_AllocTexturePool();
7522
7523         Mod_Q3BSP_LoadEntities(&header->lumps[Q3LUMP_ENTITIES]);
7524         Mod_Q3BSP_LoadTextures(&header->lumps[Q3LUMP_TEXTURES]);
7525         Mod_Q3BSP_LoadPlanes(&header->lumps[Q3LUMP_PLANES]);
7526         if (header->version == Q3BSPVERSION_IG)
7527                 Mod_Q3BSP_LoadBrushSides_IG(&header->lumps[Q3LUMP_BRUSHSIDES]);
7528         else
7529                 Mod_Q3BSP_LoadBrushSides(&header->lumps[Q3LUMP_BRUSHSIDES]);
7530         Mod_Q3BSP_LoadBrushes(&header->lumps[Q3LUMP_BRUSHES]);
7531         Mod_Q3BSP_LoadEffects(&header->lumps[Q3LUMP_EFFECTS]);
7532         Mod_Q3BSP_LoadVertices(&header->lumps[Q3LUMP_VERTICES]);
7533         Mod_Q3BSP_LoadTriangles(&header->lumps[Q3LUMP_TRIANGLES]);
7534         Mod_Q3BSP_LoadLightmaps(&header->lumps[Q3LUMP_LIGHTMAPS], &header->lumps[Q3LUMP_FACES]);
7535         Mod_Q3BSP_LoadFaces(&header->lumps[Q3LUMP_FACES]);
7536         Mod_Q3BSP_LoadModels(&header->lumps[Q3LUMP_MODELS]);
7537         Mod_Q3BSP_LoadLeafBrushes(&header->lumps[Q3LUMP_LEAFBRUSHES]);
7538         Mod_Q3BSP_LoadLeafFaces(&header->lumps[Q3LUMP_LEAFFACES]);
7539         Mod_Q3BSP_LoadLeafs(&header->lumps[Q3LUMP_LEAFS]);
7540         Mod_Q3BSP_LoadNodes(&header->lumps[Q3LUMP_NODES]);
7541         Mod_Q3BSP_LoadLightGrid(&header->lumps[Q3LUMP_LIGHTGRID]);
7542         Mod_Q3BSP_LoadPVS(&header->lumps[Q3LUMP_PVS]);
7543         loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
7544
7545         // the MakePortals code works fine on the q3bsp data as well
7546         if (mod_bsp_portalize.integer && cls.state != ca_dedicated)
7547                 Mod_BSP_MakePortals();
7548
7549         // FIXME: shader alpha should replace r_wateralpha support in q3bsp
7550         loadmodel->brush.supportwateralpha = true;
7551
7552         loadmodel->brush.num_leafs = 0;
7553         Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
7554
7555         if (loadmodel->brush.numsubmodels)
7556                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
7557
7558         mod = loadmodel;
7559         mod->modelsurfaces_sorted = (int*)Mem_Alloc(loadmodel->mempool, mod->num_surfaces * sizeof(*mod->modelsurfaces_sorted));
7560         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
7561         {
7562                 if (i > 0)
7563                 {
7564                         char name[10];
7565                         // duplicate the basic information
7566                         dpsnprintf(name, sizeof(name), "*%i", i);
7567                         mod = Mod_FindName(name, loadmodel->name);
7568                         // copy the base model to this one
7569                         *mod = *loadmodel;
7570                         // rename the clone back to its proper name
7571                         dp_strlcpy(mod->name, name, sizeof(mod->name));
7572                         mod->brush.parentmodel = loadmodel;
7573                         // textures and memory belong to the main model
7574                         mod->texturepool = NULL;
7575                         mod->mempool = NULL;
7576                         mod->brush.GetPVS = NULL;
7577                         mod->brush.FatPVS = NULL;
7578                         mod->brush.BoxTouchingPVS = NULL;
7579                         mod->brush.BoxTouchingLeafPVS = NULL;
7580                         mod->brush.BoxTouchingVisibleLeafs = NULL;
7581                         mod->brush.FindBoxClusters = NULL;
7582                         mod->brush.LightPoint = NULL;
7583                         mod->brush.AmbientSoundLevelsForPoint = NULL;
7584                 }
7585                 mod->brush.submodel = i;
7586                 if (loadmodel->brush.submodels)
7587                         loadmodel->brush.submodels[i] = mod;
7588
7589                 // make the model surface list (used by shadowing/lighting)
7590                 mod->submodelsurfaces_start = mod->brushq3.data_models[i].firstface;
7591                 mod->submodelsurfaces_end = mod->brushq3.data_models[i].firstface + mod->brushq3.data_models[i].numfaces;
7592                 mod->firstmodelbrush = mod->brushq3.data_models[i].firstbrush;
7593                 mod->nummodelbrushes = mod->brushq3.data_models[i].numbrushes;
7594
7595                 VectorCopy(mod->brushq3.data_models[i].mins, mod->normalmins);
7596                 VectorCopy(mod->brushq3.data_models[i].maxs, mod->normalmaxs);
7597                 // enlarge the bounding box to enclose all geometry of this model,
7598                 // because q3map2 sometimes lies (mostly to affect the lightgrid),
7599                 // which can in turn mess up the farclip (as well as culling when
7600                 // outside the level - an unimportant concern)
7601
7602                 //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]);
7603                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
7604                 {
7605                         const msurface_t *surface = mod->data_surfaces + j;
7606                         const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
7607                         int k;
7608                         if (!surface->num_vertices)
7609                                 continue;
7610                         for (k = 0;k < surface->num_vertices;k++, v += 3)
7611                         {
7612                                 mod->normalmins[0] = min(mod->normalmins[0], v[0]);
7613                                 mod->normalmins[1] = min(mod->normalmins[1], v[1]);
7614                                 mod->normalmins[2] = min(mod->normalmins[2], v[2]);
7615                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
7616                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
7617                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
7618                         }
7619                 }
7620                 //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]);
7621                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
7622                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
7623                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
7624                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
7625                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
7626                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
7627                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
7628                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
7629                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
7630                 mod->yawmins[2] = mod->normalmins[2];
7631                 mod->yawmaxs[2] = mod->normalmaxs[2];
7632                 mod->radius = modelradius;
7633                 mod->radius2 = modelradius * modelradius;
7634
7635                 Mod_SetDrawSkyAndWater(mod);
7636                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
7637                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
7638
7639                 // generate VBOs and other shared data before cloning submodels
7640                 if (i == 0)
7641                         Mod_BuildVBOs();
7642         }
7643         mod = loadmodel;
7644
7645         // make the model surface list (used by shadowing/lighting)
7646         Mod_MakeSortedSurfaces(loadmodel);
7647
7648         if (mod_q3bsp_sRGBlightmaps.integer)
7649         {
7650                 if (vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
7651                 {
7652                         // actually we do in sRGB fallback with sRGB lightmaps: Image_sRGBFloatFromLinear_Lightmap(Image_LinearFloatFromsRGBFloat(x))
7653                         // neutral point is at Image_sRGBFloatFromLinearFloat(0.5)
7654                         // so we need to map Image_sRGBFloatFromLinearFloat(0.5) to 0.5
7655                         // factor is 0.5 / Image_sRGBFloatFromLinearFloat(0.5)
7656                         //loadmodel->lightmapscale *= 0.679942f; // fixes neutral level
7657                 }
7658                 else // if this is NOT set, regular rendering looks right by this requirement anyway
7659                 {
7660                         /*
7661                         // we want color 1 to do the same as without sRGB
7662                         // so, we want to map 1 to Image_LinearFloatFromsRGBFloat(2) instead of to 2
7663                         loadmodel->lightmapscale *= 2.476923f; // fixes max level
7664                         */
7665
7666                         // neutral level 0.5 gets uploaded as sRGB and becomes Image_LinearFloatFromsRGBFloat(0.5)
7667                         // we need to undo that
7668                         loadmodel->lightmapscale *= 2.336f; // fixes neutral level
7669                 }
7670         }
7671
7672         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);
7673 }
7674
7675 void Mod_IBSP_Load(model_t *mod, void *buffer, void *bufferend)
7676 {
7677         int i = LittleLong(((int *)buffer)[1]);
7678         if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG || i == Q3BSPVERSION_LIVE)
7679                 Mod_Q3BSP_Load(mod,buffer, bufferend);
7680         else if (i == Q2BSPVERSION)
7681                 Mod_Q2BSP_Load(mod,buffer, bufferend);
7682         else
7683                 Host_Error("Mod_IBSP_Load: unknown/unsupported version %i", i);
7684 }
7685
7686 static void Mod_VBSP_LoadEntities(sizebuf_t *sb)
7687 {
7688         loadmodel->brush.entities = NULL;
7689         if (!sb->cursize)
7690                 return;
7691         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
7692         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
7693         loadmodel->brush.entities[sb->cursize] = 0;
7694 }
7695
7696 static void Mod_VBSP_LoadVertexes(sizebuf_t *sb)
7697 {
7698         mvertex_t       *out;
7699         int                     i, count;
7700         int                     structsize = 12;
7701
7702         if (sb->cursize % structsize)
7703                 Host_Error("Mod_VBSP_LoadVertexes: funny lump size in %s",loadmodel->name);
7704         count = sb->cursize / structsize;
7705         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
7706
7707         loadmodel->brushq1.vertexes = out;
7708         loadmodel->brushq1.numvertexes = count;
7709
7710         for ( i=0 ; i<count ; i++, out++)
7711         {
7712                 out->position[0] = MSG_ReadLittleFloat(sb);
7713                 out->position[1] = MSG_ReadLittleFloat(sb);
7714                 out->position[2] = MSG_ReadLittleFloat(sb);
7715         }
7716 }
7717
7718 static void Mod_VBSP_LoadEdges(sizebuf_t *sb)
7719 {
7720         medge_t *out;
7721         int     i, count;
7722         int             structsize = 4;
7723
7724         if (sb->cursize % structsize)
7725                 Host_Error("Mod_VBSP_LoadEdges: funny lump size in %s",loadmodel->name);
7726         count = sb->cursize / structsize;
7727         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7728
7729         loadmodel->brushq1.edges = out;
7730         loadmodel->brushq1.numedges = count;
7731
7732         for ( i=0 ; i<count ; i++, out++)
7733         {
7734                 out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
7735                 out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
7736
7737                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
7738                 {
7739                         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);
7740                         if(!loadmodel->brushq1.numvertexes)
7741                                 Host_Error("Mod_VBSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
7742
7743                         out->v[0] = 0;
7744                         out->v[1] = 0;
7745                 }
7746         }
7747 }
7748
7749 static void Mod_VBSP_LoadSurfedges(sizebuf_t *sb)
7750 {
7751         int             i;
7752         int structsize = 4;
7753
7754         if (sb->cursize % structsize)
7755                 Host_Error("Mod_VBSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
7756         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
7757         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
7758
7759         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
7760                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
7761 }
7762
7763 static void Mod_VBSP_LoadTextures(sizebuf_t *sb)
7764 {
7765         Con_Printf(CON_WARN "Mod_VBSP_LoadTextures: Don't know how to do this yet\n");
7766 }
7767
7768 static void Mod_VBSP_LoadPlanes(sizebuf_t *sb)
7769 {
7770         int                     i;
7771         mplane_t        *out;
7772         int structsize = 20;
7773
7774         if (sb->cursize % structsize)
7775                 Host_Error("Mod_VBSP_LoadPlanes: funny lump size in %s", loadmodel->name);
7776         loadmodel->brush.num_planes = sb->cursize / structsize;
7777         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
7778
7779         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
7780         {
7781                 out->normal[0] = MSG_ReadLittleFloat(sb);
7782                 out->normal[1] = MSG_ReadLittleFloat(sb);
7783                 out->normal[2] = MSG_ReadLittleFloat(sb);
7784                 out->dist = MSG_ReadLittleFloat(sb);
7785                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
7786                 PlaneClassify(out);
7787         }
7788 }
7789
7790 static void Mod_VBSP_LoadTexinfo(sizebuf_t *sb)
7791 {
7792         mtexinfo_t *out;
7793         int i, j, k, count, miptex;
7794         int structsize = 72;
7795
7796         if (sb->cursize % structsize)
7797                 Host_Error("Mod_VBSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
7798         count = sb->cursize / structsize;
7799         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7800
7801         loadmodel->brushq1.texinfo = out;
7802         loadmodel->brushq1.numtexinfo = count;
7803
7804         for (i = 0;i < count;i++, out++)
7805         {
7806                 for (k = 0;k < 2;k++)
7807                         for (j = 0;j < 4;j++)
7808                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
7809
7810                 for (k = 0;k < 2;k++)
7811                         for (j = 0;j < 4;j++)
7812                                 MSG_ReadLittleFloat(sb); // TODO lightmapVecs
7813
7814                 out->q1flags = MSG_ReadLittleLong(sb);
7815                 miptex = MSG_ReadLittleLong(sb);
7816
7817                 if (out->q1flags & TEX_SPECIAL)
7818                 {
7819                         // if texture chosen is NULL or the shader needs a lightmap,
7820                         // force to notexture water shader
7821                         out->textureindex = loadmodel->num_textures - 1;
7822                 }
7823                 else
7824                 {
7825                         // if texture chosen is NULL, force to notexture
7826                         out->textureindex = loadmodel->num_textures - 2;
7827                 }
7828                 // see if the specified miptex is valid and try to use it instead
7829                 if (loadmodel->data_textures)
7830                 {
7831                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
7832                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
7833                         else
7834                                 out->textureindex = miptex;
7835                 }
7836         }
7837 }
7838
7839 static void Mod_VBSP_LoadFaces(sizebuf_t *sb)
7840 {
7841         msurface_t *surface;
7842         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
7843         float texmins[2], texmaxs[2], val;
7844         rtexture_t *lightmaptexture, *deluxemaptexture;
7845         char vabuf[1024];
7846         int structsize =  56;
7847
7848         if (sb->cursize % structsize)
7849                 Host_Error("Mod_VBSP_LoadFaces: funny lump size in %s",loadmodel->name);
7850         count = sb->cursize / structsize;
7851         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
7852         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
7853
7854         loadmodel->num_surfaces = count;
7855
7856         loadmodel->brushq1.firstrender = true;
7857         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
7858
7859         totalverts = 0;
7860         totaltris = 0;
7861         for (surfacenum = 0;surfacenum < count;surfacenum++)
7862         {
7863                 numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
7864                 totalverts += numedges;
7865                 totaltris += numedges - 2;
7866         }
7867
7868         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false);
7869
7870         lightmaptexture = NULL;
7871         deluxemaptexture = r_texture_blanknormalmap;
7872         lightmapnumber = 0;
7873         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
7874         totallightmapsamples = 0;
7875
7876         totalverts = 0;
7877         totaltris = 0;
7878         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
7879         {
7880                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
7881                 planenum = (unsigned short)MSG_ReadLittleShort(sb);
7882                 /*side = */MSG_ReadLittleShort(sb); // TODO support onNode?
7883                 firstedge = MSG_ReadLittleLong(sb);
7884                 numedges = (unsigned short)MSG_ReadLittleShort(sb);
7885                 texinfoindex = (unsigned short)MSG_ReadLittleShort(sb);
7886                 MSG_ReadLittleLong(sb); // skipping over dispinfo and surfaceFogVolumeID, both short
7887                 for (i = 0;i < MAXLIGHTMAPS;i++)
7888                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
7889                 lightmapoffset = MSG_ReadLittleLong(sb);
7890
7891                 // FIXME: validate edges, texinfo, etc?
7892                 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)
7893                         Host_Error("Mod_VBSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
7894                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
7895                         Host_Error("Mod_VBSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
7896                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
7897                         Host_Error("Mod_VBSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
7898
7899                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
7900                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
7901
7902                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
7903                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
7904                         lightmapoffset = -1;
7905
7906                 //surface->flags = surface->texture->flags;
7907                 //if (LittleShort(in->side))
7908                 //      surface->flags |= SURF_PLANEBACK;
7909                 //surface->plane = loadmodel->brush.data_planes + planenum;
7910
7911                 surface->num_firstvertex = totalverts;
7912                 surface->num_vertices = numedges;
7913                 surface->num_firsttriangle = totaltris;
7914                 surface->num_triangles = numedges - 2;
7915                 totalverts += numedges;
7916                 totaltris += numedges - 2;
7917
7918                 // convert edges back to a normal polygon
7919                 for (i = 0;i < surface->num_vertices;i++)
7920                 {
7921                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
7922                         float s, t;
7923                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
7924                         if (lindex >= 0)
7925                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7926                         else
7927                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7928                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7929                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7930                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
7931                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
7932                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
7933                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
7934                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
7935                 }
7936
7937                 for (i = 0;i < surface->num_triangles;i++)
7938                 {
7939                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
7940                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
7941                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
7942                 }
7943
7944                 // compile additional data about the surface geometry
7945                 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);
7946                 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);
7947                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
7948
7949                 // generate surface extents information
7950                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7951                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7952                 for (i = 1;i < surface->num_vertices;i++)
7953                 {
7954                         for (j = 0;j < 2;j++)
7955                         {
7956                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
7957                                 texmins[j] = min(texmins[j], val);
7958                                 texmaxs[j] = max(texmaxs[j], val);
7959                         }
7960                 }
7961                 for (i = 0;i < 2;i++)
7962                 {
7963                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
7964                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
7965                 }
7966
7967                 smax = surface->lightmapinfo->extents[0] >> 4;
7968                 tmax = surface->lightmapinfo->extents[1] >> 4;
7969                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
7970                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
7971
7972                 // lighting info
7973                 surface->lightmaptexture = NULL;
7974                 surface->deluxemaptexture = r_texture_blanknormalmap;
7975                 if (lightmapoffset == -1)
7976                 {
7977                         surface->lightmapinfo->samples = NULL;
7978 #if 1
7979                         // give non-lightmapped water a 1x white lightmap
7980                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
7981                         {
7982                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
7983                                 surface->lightmapinfo->styles[0] = 0;
7984                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
7985                         }
7986 #endif
7987                 }
7988                 else
7989                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
7990
7991                 // check if we should apply a lightmap to this
7992                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
7993                 {
7994                         if (ssize > 256 || tsize > 256)
7995                                 Host_Error("Bad surface extents");
7996
7997                         if (lightmapsize < ssize)
7998                                 lightmapsize = ssize;
7999                         if (lightmapsize < tsize)
8000                                 lightmapsize = tsize;
8001
8002                         totallightmapsamples += ssize*tsize;
8003
8004                         // force lightmap upload on first time seeing the surface
8005                         //
8006                         // additionally this is used by the later code to see if a
8007                         // lightmap is needed on this surface (rather than duplicating the
8008                         // logic above)
8009                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
8010                         loadmodel->lit = true;
8011                 }
8012         }
8013
8014         // small maps (such as ammo boxes especially) don't need big lightmap
8015         // textures, so this code tries to guess a good size based on
8016         // totallightmapsamples (size of the lightmaps lump basically), as well as
8017         // trying to max out the size if there is a lot of lightmap data to store
8018         // additionally, never choose a lightmapsize that is smaller than the
8019         // largest surface encountered (as it would fail)
8020         i = lightmapsize;
8021         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
8022                 ;
8023
8024         // now that we've decided the lightmap texture size, we can do the rest
8025         if (cls.state != ca_dedicated)
8026         {
8027                 int stainmapsize = 0;
8028                 mod_alloclightmap_state_t allocState;
8029
8030                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
8031                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8032                 {
8033                         int iu, iv, lightmapx = 0, lightmapy = 0;
8034                         float u, v, ubase, vbase, uscale, vscale;
8035
8036                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8037                                 continue;
8038
8039                         smax = surface->lightmapinfo->extents[0] >> 4;
8040                         tmax = surface->lightmapinfo->extents[1] >> 4;
8041                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8042                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8043                         stainmapsize += ssize * tsize * 3;
8044
8045                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
8046                         {
8047                                 // allocate a texture pool if we need it
8048                                 if (loadmodel->texturepool == NULL)
8049                                         loadmodel->texturepool = R_AllocTexturePool();
8050                                 // could not find room, make a new lightmap
8051                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
8052                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
8053                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
8054                                 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);
8055                                 if (loadmodel->brushq1.nmaplightdata)
8056                                         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);
8057                                 lightmapnumber++;
8058                                 Mod_AllocLightmap_Reset(&allocState);
8059                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
8060                         }
8061                         surface->lightmaptexture = lightmaptexture;
8062                         surface->deluxemaptexture = deluxemaptexture;
8063                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
8064                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
8065
8066                         uscale = 1.0f / (float)lightmapsize;
8067                         vscale = 1.0f / (float)lightmapsize;
8068                         ubase = lightmapx * uscale;
8069                         vbase = lightmapy * vscale;
8070
8071                         for (i = 0;i < surface->num_vertices;i++)
8072                         {
8073                                 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);
8074                                 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);
8075                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
8076                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
8077                                 // LadyHavoc: calc lightmap data offset for vertex lighting to use
8078                                 iu = (int) u;
8079                                 iv = (int) v;
8080                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
8081                         }
8082                 }
8083
8084                 if (cl_stainmaps.integer)
8085                 {
8086                         // allocate stainmaps for permanent marks on walls and clear white
8087                         unsigned char *stainsamples = NULL;
8088                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
8089                         memset(stainsamples, 255, stainmapsize);
8090                         // assign pointers
8091                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8092                         {
8093                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8094                                         continue;
8095                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8096                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8097                                 surface->lightmapinfo->stainsamples = stainsamples;
8098                                 stainsamples += ssize * tsize * 3;
8099                         }
8100                 }
8101         }
8102
8103         // generate ushort elements array if possible
8104         if (loadmodel->surfmesh.data_element3s)
8105                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8106                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8107 }
8108
8109 // Valve BSP loader
8110 // Cloudwalk: Wasn't sober when I wrote this. I screamed and ran away at the face loader
8111 void Mod_VBSP_Load(model_t *mod, void *buffer, void *bufferend)
8112 {
8113         static cvar_t *testing = NULL; // TEMPORARY
8114         int i;
8115         sizebuf_t sb;
8116         sizebuf_t lumpsb[HL2HEADER_LUMPS];
8117
8118         if(!testing || !testing->integer)
8119         {
8120                 if(!testing)
8121                         testing = Cvar_Get(&cvars_all, "mod_bsp_vbsptest", "0", CF_CLIENT | CF_SERVER, "uhhh");
8122                 Host_Error("Mod_VBSP_Load: not yet fully implemented. Change the now-generated \"mod_bsp_vbsptest\" to 1 if you wish to test this");
8123         }
8124         else
8125         {
8126
8127                 MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
8128
8129                 mod->type = mod_brushhl2;
8130
8131                 MSG_ReadLittleLong(&sb);
8132                 MSG_ReadLittleLong(&sb); // TODO version check
8133
8134                 mod->modeldatatypestring = "VBSP";
8135
8136                 // read lumps
8137                 for (i = 0; i < HL2HEADER_LUMPS; i++)
8138                 {
8139                         int offset = MSG_ReadLittleLong(&sb);
8140                         int size = MSG_ReadLittleLong(&sb);
8141                         MSG_ReadLittleLong(&sb); // TODO support version
8142                         MSG_ReadLittleLong(&sb); // TODO support ident
8143                         if (offset < 0 || offset + size > sb.cursize)
8144                                 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);
8145                         MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
8146                 }
8147
8148                 MSG_ReadLittleLong(&sb); // TODO support revision field
8149
8150                 mod->soundfromcenter = true;
8151                 mod->TraceBox = Mod_CollisionBIH_TraceBox;
8152                 mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
8153                 mod->TraceLine = Mod_CollisionBIH_TraceLine;
8154                 mod->TracePoint = Mod_CollisionBIH_TracePoint;
8155                 mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
8156                 mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8157                 mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight; // probably not correct
8158                 mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents; // probably not correct
8159                 mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents; // probably not correct
8160                 mod->brush.GetPVS = Mod_BSP_GetPVS;
8161                 mod->brush.FatPVS = Mod_BSP_FatPVS;
8162                 mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
8163                 mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
8164                 mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
8165                 mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
8166                 mod->brush.LightPoint = Mod_Q3BSP_LightPoint; // probably not correct
8167                 mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
8168                 mod->brush.AmbientSoundLevelsForPoint = NULL;
8169                 mod->brush.RoundUpToHullSize = NULL;
8170                 mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
8171                 mod->Draw = R_Mod_Draw;
8172                 mod->DrawDepth = R_Mod_DrawDepth;
8173                 mod->DrawDebug = R_Mod_DrawDebug;
8174                 mod->DrawPrepass = R_Mod_DrawPrepass;
8175                 mod->GetLightInfo = R_Mod_GetLightInfo;
8176                 mod->CompileShadowMap = R_Mod_CompileShadowMap;
8177                 mod->DrawShadowMap = R_Mod_DrawShadowMap;
8178                 mod->DrawLight = R_Mod_DrawLight;
8179
8180                 // allocate a texture pool if we need it
8181                 if (mod->texturepool == NULL)
8182                         mod->texturepool = R_AllocTexturePool();
8183
8184                 Mod_VBSP_LoadEntities(&lumpsb[HL2LUMP_ENTITIES]);
8185                 Mod_VBSP_LoadVertexes(&lumpsb[HL2LUMP_VERTEXES]);
8186                 Mod_VBSP_LoadEdges(&lumpsb[HL2LUMP_EDGES]);
8187                 Mod_VBSP_LoadSurfedges(&lumpsb[HL2LUMP_SURFEDGES]);
8188                 Mod_VBSP_LoadTextures(&lumpsb[HL2LUMP_TEXDATA/*?*/]);
8189                 //Mod_VBSP_LoadLighting(&lumpsb[HL2LUMP_LIGHTING]);
8190                 Mod_VBSP_LoadPlanes(&lumpsb[HL2LUMP_PLANES]);
8191                 Mod_VBSP_LoadTexinfo(&lumpsb[HL2LUMP_TEXINFO]);
8192
8193                 // AHHHHHHH
8194                 Mod_VBSP_LoadFaces(&lumpsb[HL2LUMP_FACES]);
8195         }
8196 }
8197
8198 void Mod_MAP_Load(model_t *mod, void *buffer, void *bufferend)
8199 {
8200         Host_Error("Mod_MAP_Load: not yet implemented");
8201 }
8202
8203 typedef struct objvertex_s
8204 {
8205         int nextindex;
8206         int submodelindex;
8207         int textureindex;
8208         float v[3];
8209         float vt[2];
8210         float vn[3];
8211 }
8212 objvertex_t;
8213
8214 static unsigned char nobsp_pvs[1] = {1};
8215
8216 void Mod_OBJ_Load(model_t *mod, void *buffer, void *bufferend)
8217 {
8218         const char *textbase = (char *)buffer, *text = textbase;
8219         char *s;
8220         char *argv[512];
8221         char line[1024];
8222         char materialname[MAX_QPATH];
8223         int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
8224         int index1, index2, index3;
8225         objvertex_t vfirst, vprev, vcurrent;
8226         int argc;
8227         int linelen;
8228         int numtriangles = 0;
8229         int maxtriangles = 0;
8230         objvertex_t *vertices = NULL;
8231         int linenumber = 0;
8232         int maxtextures = 0, numtextures = 0, textureindex = 0;
8233         int maxv = 0, numv = 1;
8234         int maxvt = 0, numvt = 1;
8235         int maxvn = 0, numvn = 1;
8236         char *texturenames = NULL;
8237         float dist, modelradius, modelyawradius, yawradius;
8238         float *obj_v = NULL;
8239         float *obj_vt = NULL;
8240         float *obj_vn = NULL;
8241         float mins[3];
8242         float maxs[3];
8243         float corner[3];
8244         objvertex_t *thisvertex = NULL;
8245         int vertexhashindex;
8246         int *vertexhashtable = NULL;
8247         objvertex_t *vertexhashdata = NULL;
8248         objvertex_t *vdata = NULL;
8249         int vertexhashsize = 0;
8250         int vertexhashcount = 0;
8251         skinfile_t *skinfiles = NULL;
8252         unsigned char *data = NULL;
8253         int *submodelfirstsurface;
8254         msurface_t *tempsurface;
8255         msurface_t *tempsurfaces;
8256
8257         memset(&vfirst, 0, sizeof(vfirst));
8258         memset(&vprev, 0, sizeof(vprev));
8259         memset(&vcurrent, 0, sizeof(vcurrent));
8260
8261         dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
8262
8263         loadmodel->modeldatatypestring = "OBJ";
8264
8265         loadmodel->type = mod_obj;
8266         loadmodel->soundfromcenter = true;
8267         loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
8268         loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
8269         loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
8270         loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
8271         loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8272         loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
8273         loadmodel->brush.TraceLineOfSight = NULL;
8274         loadmodel->brush.SuperContentsFromNativeContents = NULL;
8275         loadmodel->brush.NativeContentsFromSuperContents = NULL;
8276         loadmodel->brush.GetPVS = NULL;
8277         loadmodel->brush.FatPVS = NULL;
8278         loadmodel->brush.BoxTouchingPVS = NULL;
8279         loadmodel->brush.BoxTouchingLeafPVS = NULL;
8280         loadmodel->brush.BoxTouchingVisibleLeafs = NULL;
8281         loadmodel->brush.FindBoxClusters = NULL;
8282         loadmodel->brush.LightPoint = NULL;
8283         loadmodel->brush.FindNonSolidLocation = NULL;
8284         loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
8285         loadmodel->brush.RoundUpToHullSize = NULL;
8286         loadmodel->brush.PointInLeaf = NULL;
8287         loadmodel->Draw = R_Mod_Draw;
8288         loadmodel->DrawDepth = R_Mod_DrawDepth;
8289         loadmodel->DrawDebug = R_Mod_DrawDebug;
8290         loadmodel->DrawPrepass = R_Mod_DrawPrepass;
8291         loadmodel->GetLightInfo = R_Mod_GetLightInfo;
8292         loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
8293         loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
8294         loadmodel->DrawLight = R_Mod_DrawLight;
8295
8296         skinfiles = Mod_LoadSkinFiles();
8297         if (loadmodel->numskins < 1)
8298                 loadmodel->numskins = 1;
8299
8300         // make skinscenes for the skins (no groups)
8301         loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
8302         for (i = 0;i < loadmodel->numskins;i++)
8303         {
8304                 loadmodel->skinscenes[i].firstframe = i;
8305                 loadmodel->skinscenes[i].framecount = 1;
8306                 loadmodel->skinscenes[i].loop = true;
8307                 loadmodel->skinscenes[i].framerate = 10;
8308         }
8309
8310         VectorClear(mins);
8311         VectorClear(maxs);
8312
8313         // we always have model 0, i.e. the first "submodel"
8314         loadmodel->brush.numsubmodels = 1;
8315
8316         // parse the OBJ text now
8317         for(;;)
8318         {
8319                 static char emptyarg[1] = "";
8320                 if (!*text)
8321                         break;
8322                 linenumber++;
8323                 linelen = 0;
8324                 for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
8325                         line[linelen] = text[linelen];
8326                 line[linelen] = 0;
8327                 for (argc = 0;argc < 4;argc++)
8328                         argv[argc] = emptyarg;
8329                 argc = 0;
8330                 s = line;
8331                 while (*s == ' ' || *s == '\t')
8332                         s++;
8333                 while (*s)
8334                 {
8335                         argv[argc++] = s;
8336                         while (*s > ' ')
8337                                 s++;
8338                         if (!*s)
8339                                 break;
8340                         *s++ = 0;
8341                         while (*s == ' ' || *s == '\t')
8342                                 s++;
8343                 }
8344                 text += linelen;
8345                 if (*text == '\r')
8346                         text++;
8347                 if (*text == '\n')
8348                         text++;
8349                 if (!argc)
8350                         continue;
8351                 if (argv[0][0] == '#')
8352                         continue;
8353                 if (!strcmp(argv[0], "v"))
8354                 {
8355                         if (maxv <= numv)
8356                         {
8357                                 maxv = max(maxv * 2, 1024);
8358                                 obj_v = (float *)Mem_Realloc(tempmempool, obj_v, maxv * sizeof(float[3]));
8359                         }
8360                         if(mod_obj_orientation.integer)
8361                         {
8362                                 obj_v[numv*3+0] = atof(argv[1]);
8363                                 obj_v[numv*3+2] = atof(argv[2]);
8364                                 obj_v[numv*3+1] = atof(argv[3]);
8365                         }
8366                         else
8367                         {
8368                                 obj_v[numv*3+0] = atof(argv[1]);
8369                                 obj_v[numv*3+1] = atof(argv[2]);
8370                                 obj_v[numv*3+2] = atof(argv[3]);
8371                         }
8372                         numv++;
8373                 }
8374                 else if (!strcmp(argv[0], "vt"))
8375                 {
8376                         if (maxvt <= numvt)
8377                         {
8378                                 maxvt = max(maxvt * 2, 1024);
8379                                 obj_vt = (float *)Mem_Realloc(tempmempool, obj_vt, maxvt * sizeof(float[2]));
8380                         }
8381                         obj_vt[numvt*2+0] = atof(argv[1]);
8382                         obj_vt[numvt*2+1] = 1-atof(argv[2]);
8383                         numvt++;
8384                 }
8385                 else if (!strcmp(argv[0], "vn"))
8386                 {
8387                         if (maxvn <= numvn)
8388                         {
8389                                 maxvn = max(maxvn * 2, 1024);
8390                                 obj_vn = (float *)Mem_Realloc(tempmempool, obj_vn, maxvn * sizeof(float[3]));
8391                         }
8392                         if(mod_obj_orientation.integer)
8393                         {
8394                                 obj_vn[numvn*3+0] = atof(argv[1]);
8395                                 obj_vn[numvn*3+2] = atof(argv[2]);
8396                                 obj_vn[numvn*3+1] = atof(argv[3]);
8397                         }
8398                         else
8399                         {
8400                                 obj_vn[numvn*3+0] = atof(argv[1]);
8401                                 obj_vn[numvn*3+1] = atof(argv[2]);
8402                                 obj_vn[numvn*3+2] = atof(argv[3]);
8403                         }
8404                         numvn++;
8405                 }
8406                 else if (!strcmp(argv[0], "f"))
8407                 {
8408                         if (!numtextures)
8409                         {
8410                                 if (maxtextures <= numtextures)
8411                                 {
8412                                         maxtextures = max(maxtextures * 2, 256);
8413                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8414                                 }
8415                                 textureindex = numtextures++;
8416                                 dp_strlcpy(texturenames + textureindex*MAX_QPATH, loadmodel->name, MAX_QPATH);
8417                         }
8418                         for (j = 1;j < argc;j++)
8419                         {
8420                                 index1 = atoi(argv[j]);
8421                                 while(argv[j][0] && argv[j][0] != '/')
8422                                         argv[j]++;
8423                                 if (argv[j][0])
8424                                         argv[j]++;
8425                                 index2 = atoi(argv[j]);
8426                                 while(argv[j][0] && argv[j][0] != '/')
8427                                         argv[j]++;
8428                                 if (argv[j][0])
8429                                         argv[j]++;
8430                                 index3 = atoi(argv[j]);
8431                                 // negative refers to a recent vertex
8432                                 // zero means not specified
8433                                 // positive means an absolute vertex index
8434                                 if (index1 < 0)
8435                                         index1 = numv - index1;
8436                                 if (index2 < 0)
8437                                         index2 = numvt - index2;
8438                                 if (index3 < 0)
8439                                         index3 = numvn - index3;
8440                                 vcurrent.nextindex = -1;
8441                                 vcurrent.textureindex = textureindex;
8442                                 vcurrent.submodelindex = submodelindex;
8443                                 if (obj_v && index1 >= 0 && index1 < numv)
8444                                         VectorCopy(obj_v + 3*index1, vcurrent.v);
8445                                 if (obj_vt && index2 >= 0 && index2 < numvt)
8446                                         Vector2Copy(obj_vt + 2*index2, vcurrent.vt);
8447                                 if (obj_vn && index3 >= 0 && index3 < numvn)
8448                                         VectorCopy(obj_vn + 3*index3, vcurrent.vn);
8449                                 if (numtriangles == 0)
8450                                 {
8451                                         VectorCopy(vcurrent.v, mins);
8452                                         VectorCopy(vcurrent.v, maxs);
8453                                 }
8454                                 else
8455                                 {
8456                                         mins[0] = min(mins[0], vcurrent.v[0]);
8457                                         mins[1] = min(mins[1], vcurrent.v[1]);
8458                                         mins[2] = min(mins[2], vcurrent.v[2]);
8459                                         maxs[0] = max(maxs[0], vcurrent.v[0]);
8460                                         maxs[1] = max(maxs[1], vcurrent.v[1]);
8461                                         maxs[2] = max(maxs[2], vcurrent.v[2]);
8462                                 }
8463                                 if (j == 1)
8464                                         vfirst = vcurrent;
8465                                 else if (j >= 3)
8466                                 {
8467                                         if (maxtriangles <= numtriangles)
8468                                         {
8469                                                 maxtriangles = max(maxtriangles * 2, 32768);
8470                                                 vertices = (objvertex_t*)Mem_Realloc(loadmodel->mempool, vertices, maxtriangles * sizeof(objvertex_t[3]));
8471                                         }
8472                                         if(mod_obj_orientation.integer)
8473                                         {
8474                                                 vertices[numtriangles*3+0] = vfirst;
8475                                                 vertices[numtriangles*3+1] = vprev;
8476                                                 vertices[numtriangles*3+2] = vcurrent;
8477                                         }
8478                                         else
8479                                         {
8480                                                 vertices[numtriangles*3+0] = vfirst;
8481                                                 vertices[numtriangles*3+2] = vprev;
8482                                                 vertices[numtriangles*3+1] = vcurrent;
8483                                         }
8484                                         numtriangles++;
8485                                 }
8486                                 vprev = vcurrent;
8487                         }
8488                 }
8489                 else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
8490                 {
8491                         submodelindex = atof(argv[1]);
8492                         loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
8493                 }
8494                 else if (!strcmp(argv[0], "usemtl"))
8495                 {
8496                         for (i = 0;i < numtextures;i++)
8497                                 if (!strcmp(texturenames+i*MAX_QPATH, argv[1]))
8498                                         break;
8499                         if (i < numtextures)
8500                                 textureindex = i;
8501                         else
8502                         {
8503                                 if (maxtextures <= numtextures)
8504                                 {
8505                                         maxtextures = max(maxtextures * 2, 256);
8506                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8507                                 }
8508                                 textureindex = numtextures++;
8509                                 dp_strlcpy(texturenames + textureindex*MAX_QPATH, argv[1], MAX_QPATH);
8510                         }
8511                 }
8512         }
8513
8514         // now that we have the OBJ data loaded as-is, we can convert it
8515
8516         // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
8517         VectorCopy(mins, loadmodel->normalmins);
8518         VectorCopy(maxs, loadmodel->normalmaxs);
8519         dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
8520         modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
8521         modelyawradius = dist*dist+modelyawradius*modelyawradius;
8522         modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
8523         modelradius = modelyawradius + modelradius * modelradius;
8524         modelyawradius = sqrt(modelyawradius);
8525         modelradius = sqrt(modelradius);
8526         loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
8527         loadmodel->yawmins[2] = loadmodel->normalmins[2];
8528         loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
8529         loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
8530         loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
8531         loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
8532         loadmodel->radius = modelradius;
8533         loadmodel->radius2 = modelradius * modelradius;
8534
8535         // allocate storage for triangles
8536         loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
8537         // allocate vertex hash structures to build an optimal vertex subset
8538         vertexhashsize = numtriangles*2;
8539         vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
8540         memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
8541         vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
8542         vertexhashcount = 0;
8543
8544         // gather surface stats for assigning vertex/triangle ranges
8545         firstvertex = 0;
8546         firsttriangle = 0;
8547         elementindex = 0;
8548         loadmodel->num_surfaces = 0;
8549         // allocate storage for the worst case number of surfaces, later we resize
8550         tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
8551         submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
8552         tempsurface = tempsurfaces;
8553         for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
8554         {
8555                 submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8556                 for (textureindex = 0;textureindex < numtextures;textureindex++)
8557                 {
8558                         for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
8559                         {
8560                                 thisvertex = vertices + vertexindex;
8561                                 if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
8562                                         break;
8563                         }
8564                         // skip the surface creation if there are no triangles for it
8565                         if (vertexindex == numtriangles*3)
8566                                 continue;
8567                         // create a surface for these vertices
8568                         surfacevertices = 0;
8569                         surfaceelements = 0;
8570                         // we hack in a texture index in the surface to be fixed up later...
8571                         tempsurface->texture = (texture_t *)((size_t)textureindex);
8572                         // calculate bounds as we go
8573                         VectorCopy(thisvertex->v, tempsurface->mins);
8574                         VectorCopy(thisvertex->v, tempsurface->maxs);
8575                         for (;vertexindex < numtriangles*3;vertexindex++)
8576                         {
8577                                 thisvertex = vertices + vertexindex;
8578                                 if (thisvertex->submodelindex != submodelindex)
8579                                         continue;
8580                                 if (thisvertex->textureindex != textureindex)
8581                                         continue;
8582                                 // add vertex to surface bounds
8583                                 tempsurface->mins[0] = min(tempsurface->mins[0], thisvertex->v[0]);
8584                                 tempsurface->mins[1] = min(tempsurface->mins[1], thisvertex->v[1]);
8585                                 tempsurface->mins[2] = min(tempsurface->mins[2], thisvertex->v[2]);
8586                                 tempsurface->maxs[0] = max(tempsurface->maxs[0], thisvertex->v[0]);
8587                                 tempsurface->maxs[1] = max(tempsurface->maxs[1], thisvertex->v[1]);
8588                                 tempsurface->maxs[2] = max(tempsurface->maxs[2], thisvertex->v[2]);
8589                                 // add the vertex if it is not found in the merged set, and
8590                                 // get its index (triangle element) for the surface
8591                                 vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
8592                                 for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
8593                                 {
8594                                         vdata = vertexhashdata + i;
8595                                         if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
8596                                                 break;
8597                                 }
8598                                 if (i < 0)
8599                                 {
8600                                         i = vertexhashcount++;
8601                                         vdata = vertexhashdata + i;
8602                                         *vdata = *thisvertex;
8603                                         vdata->nextindex = vertexhashtable[vertexhashindex];
8604                                         vertexhashtable[vertexhashindex] = i;
8605                                         surfacevertices++;
8606                                 }
8607                                 loadmodel->surfmesh.data_element3i[elementindex++] = i;
8608                                 surfaceelements++;
8609                         }
8610                         surfacetriangles = surfaceelements / 3;
8611                         tempsurface->num_vertices = surfacevertices;
8612                         tempsurface->num_triangles = surfacetriangles;
8613                         tempsurface->num_firstvertex = firstvertex;
8614                         tempsurface->num_firsttriangle = firsttriangle;
8615                         firstvertex += tempsurface->num_vertices;
8616                         firsttriangle += tempsurface->num_triangles;
8617                         tempsurface++;
8618                         loadmodel->num_surfaces++;
8619                 }
8620         }
8621         submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8622         numvertices = firstvertex;
8623         loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
8624         tempsurfaces = NULL;
8625
8626         // allocate storage for final mesh data
8627         loadmodel->num_textures = numtextures * loadmodel->numskins;
8628         loadmodel->num_texturesperskin = numtextures;
8629         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 *));
8630         loadmodel->brush.submodels = (model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(model_t *);
8631         loadmodel->modelsurfaces_sorted = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
8632         loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
8633         loadmodel->surfmesh.num_vertices = numvertices;
8634         loadmodel->surfmesh.num_triangles = numtriangles;
8635         loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
8636         loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
8637         loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
8638         loadmodel->surfmesh.data_normal3f = (float *)data;data += numvertices * sizeof(float[3]);
8639         loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += numvertices * sizeof(float[2]);
8640
8641         if (loadmodel->surfmesh.num_vertices <= 65536) {
8642                 loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
8643         }
8644
8645         for (j = 0;j < loadmodel->surfmesh.num_vertices;j++)
8646         {
8647                 VectorCopy(vertexhashdata[j].v, loadmodel->surfmesh.data_vertex3f + 3*j);
8648                 VectorCopy(vertexhashdata[j].vn, loadmodel->surfmesh.data_normal3f + 3*j);
8649                 Vector2Copy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
8650         }
8651
8652         // load the textures
8653         for (textureindex = 0;textureindex < numtextures;textureindex++)
8654                 Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
8655         Mod_FreeSkinFiles(skinfiles);
8656
8657         // set the surface textures to their real values now that we loaded them...
8658         for (i = 0;i < loadmodel->num_surfaces;i++)
8659                 loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
8660
8661         // free data
8662         Mem_Free(vertices);
8663         Mem_Free(texturenames);
8664         Mem_Free(obj_v);
8665         Mem_Free(obj_vt);
8666         Mem_Free(obj_vn);
8667         Mem_Free(vertexhashtable);
8668         Mem_Free(vertexhashdata);
8669
8670         // compute all the mesh information that was not loaded from the file
8671         if (loadmodel->surfmesh.data_element3s)
8672                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8673                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8674         Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
8675         // generate normals if the file did not have them
8676         if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
8677                 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);
8678         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);
8679
8680         // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
8681         loadmodel->brush.num_visleafs = 1;
8682         loadmodel->brush.num_leafs = 1;
8683         loadmodel->brush.num_nodes = 0;
8684         loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
8685         loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
8686         loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
8687         loadmodel->brush.num_pvsclusters = 1;
8688         loadmodel->brush.num_pvsclusterbytes = 1;
8689         loadmodel->brush.data_pvsclusters = nobsp_pvs;
8690         //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
8691         //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
8692         loadmodel->brush.data_leafsurfaces = loadmodel->modelsurfaces_sorted;
8693         VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
8694         VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
8695         loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
8696         loadmodel->brush.data_leafs->clusterindex = 0;
8697         loadmodel->brush.data_leafs->areaindex = 0;
8698         loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
8699         loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
8700         loadmodel->brush.data_leafs->numleafbrushes = 0;
8701         loadmodel->brush.data_leafs->firstleafbrush = NULL;
8702         loadmodel->brush.supportwateralpha = true;
8703
8704         if (loadmodel->brush.numsubmodels)
8705                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
8706
8707         mod = loadmodel;
8708         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
8709         {
8710                 if (i > 0)
8711                 {
8712                         char name[10];
8713                         // duplicate the basic information
8714                         dpsnprintf(name, sizeof(name), "*%i", i);
8715                         mod = Mod_FindName(name, loadmodel->name);
8716                         // copy the base model to this one
8717                         *mod = *loadmodel;
8718                         // rename the clone back to its proper name
8719                         dp_strlcpy(mod->name, name, sizeof(mod->name));
8720                         mod->brush.parentmodel = loadmodel;
8721                         // textures and memory belong to the main model
8722                         mod->texturepool = NULL;
8723                         mod->mempool = NULL;
8724                         mod->brush.GetPVS = NULL;
8725                         mod->brush.FatPVS = NULL;
8726                         mod->brush.BoxTouchingPVS = NULL;
8727                         mod->brush.BoxTouchingLeafPVS = NULL;
8728                         mod->brush.BoxTouchingVisibleLeafs = NULL;
8729                         mod->brush.FindBoxClusters = NULL;
8730                         mod->brush.LightPoint = NULL;
8731                         mod->brush.AmbientSoundLevelsForPoint = NULL;
8732                 }
8733                 mod->brush.submodel = i;
8734                 if (loadmodel->brush.submodels)
8735                         loadmodel->brush.submodels[i] = mod;
8736
8737                 // make the model surface list (used by shadowing/lighting)
8738                 mod->submodelsurfaces_start = submodelfirstsurface[i];
8739                 mod->submodelsurfaces_end = submodelfirstsurface[i+1];
8740                 mod->firstmodelbrush = 0;
8741                 mod->nummodelbrushes = 0;
8742
8743                 VectorClear(mod->normalmins);
8744                 VectorClear(mod->normalmaxs);
8745                 l = false;
8746                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
8747                 {
8748                         const msurface_t *surface = mod->data_surfaces + j;
8749                         const float *v3f = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
8750                         int k;
8751                         if (!surface->num_vertices)
8752                                 continue;
8753                         if (!l)
8754                         {
8755                                 l = true;
8756                                 VectorCopy(v3f, mod->normalmins);
8757                                 VectorCopy(v3f, mod->normalmaxs);
8758                         }
8759                         for (k = 0;k < surface->num_vertices;k++, v3f += 3)
8760                         {
8761                                 mod->normalmins[0] = min(mod->normalmins[0], v3f[0]);
8762                                 mod->normalmins[1] = min(mod->normalmins[1], v3f[1]);
8763                                 mod->normalmins[2] = min(mod->normalmins[2], v3f[2]);
8764                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v3f[0]);
8765                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v3f[1]);
8766                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v3f[2]);
8767                         }
8768                 }
8769                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
8770                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
8771                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
8772                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
8773                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
8774                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
8775                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
8776                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
8777                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
8778                 mod->yawmins[2] = mod->normalmins[2];
8779                 mod->yawmaxs[2] = mod->normalmaxs[2];
8780                 mod->radius = modelradius;
8781                 mod->radius2 = modelradius * modelradius;
8782
8783                 Mod_SetDrawSkyAndWater(mod);
8784
8785                 Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
8786                 mod->render_bih = mod->collision_bih;
8787
8788                 // generate VBOs and other shared data before cloning submodels
8789                 if (i == 0)
8790                         Mod_BuildVBOs();
8791         }
8792         mod = loadmodel;
8793         Mem_Free(submodelfirstsurface);
8794
8795         // make the model surface list (used by shadowing/lighting)
8796         Mod_MakeSortedSurfaces(loadmodel);
8797
8798         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);
8799 }