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_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)"};
  30 cvar_t mod_bsp_portalize = {CF_CLIENT, "mod_bsp_portalize", "1", "enables portal generation from BSP tree (may take several seconds per map), used by r_drawportals, r_useportalculling, r_shadow_realtime_dlight_portalculling, r_shadow_realtime_world_compileportalculling"};
  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 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)"};
  34 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)"};
  35 cvar_t r_subdivisions_maxtess = {CF_CLIENT, "r_subdivisions_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
  36 cvar_t r_subdivisions_maxvertices = {CF_CLIENT, "r_subdivisions_maxvertices", "65536", "maximum vertices allowed per subdivided curve"};
  37 cvar_t r_subdivisions_collision_tolerance = {CF_CLIENT, "r_subdivisions_collision_tolerance", "15", "maximum error tolerance on curve subdivision for collision purposes (usually a larger error tolerance than for rendering)"};
  38 cvar_t r_subdivisions_collision_mintess = {CF_CLIENT, "r_subdivisions_collision_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
  39 cvar_t r_subdivisions_collision_maxtess = {CF_CLIENT, "r_subdivisions_collision_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
  40 cvar_t r_subdivisions_collision_maxvertices = {CF_CLIENT, "r_subdivisions_collision_maxvertices", "4225", "maximum vertices allowed per subdivided curve"};
  41 cvar_t r_trippy = {CF_CLIENT, "r_trippy", "0", "easter egg"};
  42 cvar_t r_fxaa = {CF_CLIENT | CF_ARCHIVE, "r_fxaa", "0", "fast approximate anti aliasing"};
  43 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"};
  44 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)"};
  45 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"};
  46 cvar_t mod_q3bsp_curves_collisions = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_collisions", "1", "enables collisions with curves (SLOW)"};
  47 cvar_t mod_q3bsp_curves_collisions_stride = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_collisions_stride", "16", "collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
  48 cvar_t mod_q3bsp_curves_stride = {CF_CLIENT | CF_SERVER, "mod_q3bsp_curves_stride", "16", "particle effect collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
  49 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)"};
  50 cvar_t mod_q3bsp_debugtracebrush = {CF_CLIENT | CF_SERVER, "mod_q3bsp_debugtracebrush", "0", "selects different tracebrush bsp recursion algorithms (for debugging purposes only)"};
  51 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, ..."};
  52 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)"};
  53 cvar_t mod_q3bsp_tracelineofsight_brushes = {CF_CLIENT | CF_SERVER, "mod_q3bsp_tracelineofsight_brushes", "0", "enables culling of entities behind detail brushes, curves, etc"};
  54 cvar_t mod_q3bsp_sRGBlightmaps = {CF_CLIENT, "mod_q3bsp_sRGBlightmaps", "0", "treat lightmaps from Q3 maps as sRGB when vid_sRGB is active"};
  55 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"};
  56 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)"};
  57 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)"};
  58 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"};
  59 cvar_t mod_q3shader_default_offsetmapping_scale = {CF_CLIENT | CF_ARCHIVE, "mod_q3shader_default_offsetmapping_scale", "1", "default scale used for offsetmapping"};
  60 cvar_t mod_q3shader_default_offsetmapping_bias = {CF_CLIENT | CF_ARCHIVE, "mod_q3shader_default_offsetmapping_bias", "0", "default bias used for offsetmapping"};
  61 cvar_t mod_q3shader_default_polygonfactor = {CF_CLIENT, "mod_q3shader_default_polygonfactor", "0", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  62 cvar_t mod_q3shader_default_polygonoffset = {CF_CLIENT, "mod_q3shader_default_polygonoffset", "-2", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
  63 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"};
  64 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"};
  65 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"};
  66
  67 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)"};
  68 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's cliphull (32x32x56)"};
  69 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"};
  70
  71 static texture_t mod_q1bsp_texture_solid;
  72 static texture_t mod_q1bsp_texture_sky;
  73 static texture_t mod_q1bsp_texture_lava;
  74 static texture_t mod_q1bsp_texture_slime;
  75 static texture_t mod_q1bsp_texture_water;
  76
  77 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);
  78
  79 void Mod_BrushInit(void)
  80 {
  81 //      Cvar_RegisterVariable(&r_subdivide_size);
  82         Cvar_RegisterVariable(&mod_bsp_portalize);
  83         Cvar_RegisterVariable(&r_novis);
  84         Cvar_RegisterVariable(&r_nosurftextures);
  85         Cvar_RegisterVariable(&r_subdivisions_tolerance);
  86         Cvar_RegisterVariable(&r_subdivisions_mintess);
  87         Cvar_RegisterVariable(&r_subdivisions_maxtess);
  88         Cvar_RegisterVariable(&r_subdivisions_maxvertices);
  89         Cvar_RegisterVariable(&r_subdivisions_collision_tolerance);
  90         Cvar_RegisterVariable(&r_subdivisions_collision_mintess);
  91         Cvar_RegisterVariable(&r_subdivisions_collision_maxtess);
  92         Cvar_RegisterVariable(&r_subdivisions_collision_maxvertices);
  93         Cvar_RegisterVariable(&r_trippy);
  94         Cvar_RegisterVariable(&r_fxaa);
  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_curves_collisions_stride);
 100         Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
 101         Cvar_RegisterVariable(&mod_q3bsp_optimizedtraceline);
 102         Cvar_RegisterVariable(&mod_q3bsp_debugtracebrush);
 103         Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
 104         Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
 105         Cvar_RegisterVariable(&mod_q3bsp_sRGBlightmaps);
 106         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_texture);
 107         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_world_surfaces);
 108         Cvar_RegisterVariable(&mod_q3bsp_lightgrid_bsp_surfaces);
 109         Cvar_RegisterVariable(&mod_q3bsp_tracelineofsight_brushes);
 110         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping);
 111         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_scale);
 112         Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_bias);
 113         Cvar_RegisterVariable(&mod_q3shader_default_polygonfactor);
 114         Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
 115         Cvar_RegisterVariable(&mod_q3shader_default_refractive_index);
 116         Cvar_RegisterVariable(&mod_q3shader_force_addalpha);
 117         Cvar_RegisterVariable(&mod_q3shader_force_terrain_alphaflag);
 118         Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
 119         Cvar_RegisterVariable(&mod_q1bsp_zero_hullsize_cutoff);
 120         Cvar_RegisterVariable(&mod_recalculatenodeboxes);
 121
 122         // these games were made for older DP engines and are no longer
 123         // maintained; use this hack to show their textures properly
 124         if(gamemode == GAME_NEXUIZ)
 125                 Cvar_SetQuick(&mod_q3shader_force_addalpha, "1");
 126
 127         memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
 128         strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
 129         mod_q1bsp_texture_solid.surfaceflags = 0;
 130         mod_q1bsp_texture_solid.supercontents = SUPERCONTENTS_SOLID;
 131
 132         mod_q1bsp_texture_sky = mod_q1bsp_texture_solid;
 133         strlcpy(mod_q1bsp_texture_sky.name, "sky", sizeof(mod_q1bsp_texture_sky.name));
 134         mod_q1bsp_texture_sky.surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
 135         mod_q1bsp_texture_sky.supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP;
 136
 137         mod_q1bsp_texture_lava = mod_q1bsp_texture_solid;
 138         strlcpy(mod_q1bsp_texture_lava.name, "*lava", sizeof(mod_q1bsp_texture_lava.name));
 139         mod_q1bsp_texture_lava.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 140         mod_q1bsp_texture_lava.supercontents = SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 141
 142         mod_q1bsp_texture_slime = mod_q1bsp_texture_solid;
 143         strlcpy(mod_q1bsp_texture_slime.name, "*slime", sizeof(mod_q1bsp_texture_slime.name));
 144         mod_q1bsp_texture_slime.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 145         mod_q1bsp_texture_slime.supercontents = SUPERCONTENTS_SLIME;
 146
 147         mod_q1bsp_texture_water = mod_q1bsp_texture_solid;
 148         strlcpy(mod_q1bsp_texture_water.name, "*water", sizeof(mod_q1bsp_texture_water.name));
 149         mod_q1bsp_texture_water.surfaceflags = Q3SURFACEFLAG_NOMARKS;
 150         mod_q1bsp_texture_water.supercontents = SUPERCONTENTS_WATER;
 151 }
 152
 153 static mleaf_t *Mod_BSP_PointInLeaf(model_t *model, const vec3_t p)
 154 {
 155         mnode_t *node;
 156
 157         if (model == NULL)
 158                 return NULL;
 159
 160         // LadyHavoc: modified to start at first clip node,
 161         // in other words: first node of the (sub)model
 162         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 163         while (node->plane)
 164                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
 165
 166         return (mleaf_t *)node;
 167 }
 168
 169 static void Mod_Q1BSP_AmbientSoundLevelsForPoint(model_t *model, const vec3_t p, unsigned char *out, int outsize)
 170 {
 171         int i;
 172         mleaf_t *leaf;
 173         leaf = Mod_BSP_PointInLeaf(model, p);
 174         if (leaf)
 175         {
 176                 i = min(outsize, (int)sizeof(leaf->ambient_sound_level));
 177                 if (i)
 178                 {
 179                         memcpy(out, leaf->ambient_sound_level, i);
 180                         out += i;
 181                         outsize -= i;
 182                 }
 183         }
 184         if (outsize)
 185                 memset(out, 0, outsize);
 186 }
 187
 188 static int Mod_BSP_FindBoxClusters(model_t *model, const vec3_t mins, const vec3_t maxs, int maxclusters, int *clusterlist)
 189 {
 190         int numclusters = 0;
 191         int nodestackindex = 0;
 192         mnode_t *node, *nodestack[1024];
 193         if (!model->brush.num_pvsclusters)
 194                 return -1;
 195         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 196         for (;;)
 197         {
 198 #if 1
 199                 if (node->plane)
 200                 {
 201                         // node - recurse down the BSP tree
 202                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 203                         if (sides < 3)
 204                         {
 205                                 if (sides == 0)
 206                                         return -1; // ERROR: NAN bounding box!
 207                                 // box is on one side of plane, take that path
 208                                 node = node->children[sides-1];
 209                         }
 210                         else
 211                         {
 212                                 // box crosses plane, take one path and remember the other
 213                                 if (nodestackindex < 1024)
 214                                         nodestack[nodestackindex++] = node->children[0];
 215                                 node = node->children[1];
 216                         }
 217                         continue;
 218                 }
 219                 else
 220                 {
 221                         // leaf - add clusterindex to list
 222                         if (numclusters < maxclusters)
 223                                 clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 224                         numclusters++;
 225                 }
 226 #else
 227                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 228                 {
 229                         if (node->plane)
 230                         {
 231                                 if (nodestackindex < 1024)
 232                                         nodestack[nodestackindex++] = node->children[0];
 233                                 node = node->children[1];
 234                                 continue;
 235                         }
 236                         else
 237                         {
 238                                 // leaf - add clusterindex to list
 239                                 if (numclusters < maxclusters)
 240                                         clusterlist[numclusters] = ((mleaf_t *)node)->clusterindex;
 241                                 numclusters++;
 242                         }
 243                 }
 244 #endif
 245                 // try another path we didn't take earlier
 246                 if (nodestackindex == 0)
 247                         break;
 248                 node = nodestack[--nodestackindex];
 249         }
 250         // return number of clusters found (even if more than the maxclusters)
 251         return numclusters;
 252 }
 253
 254 static int Mod_BSP_BoxTouchingPVS(model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 255 {
 256         int nodestackindex = 0;
 257         mnode_t *node, *nodestack[1024];
 258         if (!model->brush.num_pvsclusters)
 259                 return true;
 260         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 261         for (;;)
 262         {
 263 #if 1
 264                 if (node->plane)
 265                 {
 266                         // node - recurse down the BSP tree
 267                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 268                         if (sides < 3)
 269                         {
 270                                 if (sides == 0)
 271                                         return -1; // ERROR: NAN bounding box!
 272                                 // box is on one side of plane, take that path
 273                                 node = node->children[sides-1];
 274                         }
 275                         else
 276                         {
 277                                 // box crosses plane, take one path and remember the other
 278                                 if (nodestackindex < 1024)
 279                                         nodestack[nodestackindex++] = node->children[0];
 280                                 node = node->children[1];
 281                         }
 282                         continue;
 283                 }
 284                 else
 285                 {
 286                         // leaf - check cluster bit
 287                         int clusterindex = ((mleaf_t *)node)->clusterindex;
 288                         if (CHECKPVSBIT(pvs, clusterindex))
 289                         {
 290                                 // it is visible, return immediately with the news
 291                                 return true;
 292                         }
 293                 }
 294 #else
 295                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 296                 {
 297                         if (node->plane)
 298                         {
 299                                 if (nodestackindex < 1024)
 300                                         nodestack[nodestackindex++] = node->children[0];
 301                                 node = node->children[1];
 302                                 continue;
 303                         }
 304                         else
 305                         {
 306                                 // leaf - check cluster bit
 307                                 int clusterindex = ((mleaf_t *)node)->clusterindex;
 308                                 if (CHECKPVSBIT(pvs, clusterindex))
 309                                 {
 310                                         // it is visible, return immediately with the news
 311                                         return true;
 312                                 }
 313                         }
 314                 }
 315 #endif
 316                 // nothing to see here, try another path we didn't take earlier
 317                 if (nodestackindex == 0)
 318                         break;
 319                 node = nodestack[--nodestackindex];
 320         }
 321         // it is not visible
 322         return false;
 323 }
 324
 325 static int Mod_BSP_BoxTouchingLeafPVS(model_t *model, const unsigned char *pvs, const vec3_t mins, const vec3_t maxs)
 326 {
 327         int nodestackindex = 0;
 328         mnode_t *node, *nodestack[1024];
 329         if (!model->brush.num_leafs)
 330                 return true;
 331         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 332         for (;;)
 333         {
 334 #if 1
 335                 if (node->plane)
 336                 {
 337                         // node - recurse down the BSP tree
 338                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 339                         if (sides < 3)
 340                         {
 341                                 if (sides == 0)
 342                                         return -1; // ERROR: NAN bounding box!
 343                                 // box is on one side of plane, take that path
 344                                 node = node->children[sides-1];
 345                         }
 346                         else
 347                         {
 348                                 // box crosses plane, take one path and remember the other
 349                                 if (nodestackindex < 1024)
 350                                         nodestack[nodestackindex++] = node->children[0];
 351                                 node = node->children[1];
 352                         }
 353                         continue;
 354                 }
 355                 else
 356                 {
 357                         // leaf - check cluster bit
 358                         int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 359                         if (CHECKPVSBIT(pvs, clusterindex))
 360                         {
 361                                 // it is visible, return immediately with the news
 362                                 return true;
 363                         }
 364                 }
 365 #else
 366                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 367                 {
 368                         if (node->plane)
 369                         {
 370                                 if (nodestackindex < 1024)
 371                                         nodestack[nodestackindex++] = node->children[0];
 372                                 node = node->children[1];
 373                                 continue;
 374                         }
 375                         else
 376                         {
 377                                 // leaf - check cluster bit
 378                                 int clusterindex = ((mleaf_t *)node) - model->brush.data_leafs;
 379                                 if (CHECKPVSBIT(pvs, clusterindex))
 380                                 {
 381                                         // it is visible, return immediately with the news
 382                                         return true;
 383                                 }
 384                         }
 385                 }
 386 #endif
 387                 // nothing to see here, try another path we didn't take earlier
 388                 if (nodestackindex == 0)
 389                         break;
 390                 node = nodestack[--nodestackindex];
 391         }
 392         // it is not visible
 393         return false;
 394 }
 395
 396 static int Mod_BSP_BoxTouchingVisibleLeafs(model_t *model, const unsigned char *visibleleafs, const vec3_t mins, const vec3_t maxs)
 397 {
 398         int nodestackindex = 0;
 399         mnode_t *node, *nodestack[1024];
 400         if (!model->brush.num_leafs)
 401                 return true;
 402         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
 403         for (;;)
 404         {
 405 #if 1
 406                 if (node->plane)
 407                 {
 408                         // node - recurse down the BSP tree
 409                         int sides = BoxOnPlaneSide(mins, maxs, node->plane);
 410                         if (sides < 3)
 411                         {
 412                                 if (sides == 0)
 413                                         return -1; // ERROR: NAN bounding box!
 414                                 // box is on one side of plane, take that path
 415                                 node = node->children[sides-1];
 416                         }
 417                         else
 418                         {
 419                                 // box crosses plane, take one path and remember the other
 420                                 if (nodestackindex < 1024)
 421                                         nodestack[nodestackindex++] = node->children[0];
 422                                 node = node->children[1];
 423                         }
 424                         continue;
 425                 }
 426                 else
 427                 {
 428                         // leaf - check if it is visible
 429                         if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 430                         {
 431                                 // it is visible, return immediately with the news
 432                                 return true;
 433                         }
 434                 }
 435 #else
 436                 if (BoxesOverlap(mins, maxs, node->mins, node->maxs))
 437                 {
 438                         if (node->plane)
 439                         {
 440                                 if (nodestackindex < 1024)
 441                                         nodestack[nodestackindex++] = node->children[0];
 442                                 node = node->children[1];
 443                                 continue;
 444                         }
 445                         else
 446                         {
 447                                 // leaf - check if it is visible
 448                                 if (visibleleafs[(mleaf_t *)node - model->brush.data_leafs])
 449                                 {
 450                                         // it is visible, return immediately with the news
 451                                         return true;
 452                                 }
 453                         }
 454                 }
 455 #endif
 456                 // nothing to see here, try another path we didn't take earlier
 457                 if (nodestackindex == 0)
 458                         break;
 459                 node = nodestack[--nodestackindex];
 460         }
 461         // it is not visible
 462         return false;
 463 }
 464
 465 typedef struct findnonsolidlocationinfo_s
 466 {
 467         vec3_t center;
 468         vec3_t absmin, absmax;
 469         vec_t radius;
 470         vec3_t nudge;
 471         vec_t bestdist;
 472         model_t *model;
 473 }
 474 findnonsolidlocationinfo_t;
 475
 476 static void Mod_BSP_FindNonSolidLocation_r_Triangle(findnonsolidlocationinfo_t *info, msurface_t *surface, int k)
 477 {
 478         int i, *tri;
 479         float dist, f, vert[3][3], edge[3][3], facenormal[3], edgenormal[3][3], point[3];
 480
 481         tri = (info->model->surfmesh.data_element3i + 3 * surface->num_firsttriangle) + k * 3;
 482         VectorCopy((info->model->surfmesh.data_vertex3f + tri[0] * 3), vert[0]);
 483         VectorCopy((info->model->surfmesh.data_vertex3f + tri[1] * 3), vert[1]);
 484         VectorCopy((info->model->surfmesh.data_vertex3f + tri[2] * 3), vert[2]);
 485         VectorSubtract(vert[1], vert[0], edge[0]);
 486         VectorSubtract(vert[2], vert[1], edge[1]);
 487         CrossProduct(edge[1], edge[0], facenormal);
 488         if (facenormal[0] || facenormal[1] || facenormal[2])
 489         {
 490                 VectorNormalize(facenormal);
 491                 f = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 492                 if (f <= info->bestdist && f >= -info->bestdist)
 493                 {
 494                         VectorSubtract(vert[0], vert[2], edge[2]);
 495                         VectorNormalize(edge[0]);
 496                         VectorNormalize(edge[1]);
 497                         VectorNormalize(edge[2]);
 498                         CrossProduct(facenormal, edge[0], edgenormal[0]);
 499                         CrossProduct(facenormal, edge[1], edgenormal[1]);
 500                         CrossProduct(facenormal, edge[2], edgenormal[2]);
 501                         // face distance
 502                         if (DotProduct(info->center, edgenormal[0]) < DotProduct(vert[0], edgenormal[0])
 503                                         && DotProduct(info->center, edgenormal[1]) < DotProduct(vert[1], edgenormal[1])
 504                                         && DotProduct(info->center, edgenormal[2]) < DotProduct(vert[2], edgenormal[2]))
 505                         {
 506                                 // we got lucky, the center is within the face
 507                                 dist = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
 508                                 if (dist < 0)
 509                                 {
 510                                         dist = -dist;
 511                                         if (info->bestdist > dist)
 512                                         {
 513                                                 info->bestdist = dist;
 514                                                 VectorScale(facenormal, (info->radius - -dist), info->nudge);
 515                                         }
 516                                 }
 517                                 else
 518                                 {
 519                                         if (info->bestdist > dist)
 520                                         {
 521                                                 info->bestdist = dist;
 522                                                 VectorScale(facenormal, (info->radius - dist), info->nudge);
 523                                         }
 524                                 }
 525                         }
 526                         else
 527                         {
 528                                 // check which edge or vertex the center is nearest
 529                                 for (i = 0;i < 3;i++)
 530                                 {
 531                                         f = DotProduct(info->center, edge[i]);
 532                                         if (f >= DotProduct(vert[0], edge[i])
 533                                                         && f <= DotProduct(vert[1], edge[i]))
 534                                         {
 535                                                 // on edge
 536                                                 VectorMA(info->center, -f, edge[i], point);
 537                                                 dist = sqrt(DotProduct(point, point));
 538                                                 if (info->bestdist > dist)
 539                                                 {
 540                                                         info->bestdist = dist;
 541                                                         VectorScale(point, (info->radius / dist), info->nudge);
 542                                                 }
 543                                                 // skip both vertex checks
 544                                                 // (both are further away than this edge)
 545                                                 i++;
 546                                         }
 547                                         else
 548                                         {
 549                                                 // not on edge, check first vertex of edge
 550                                                 VectorSubtract(info->center, vert[i], point);
 551                                                 dist = sqrt(DotProduct(point, point));
 552                                                 if (info->bestdist > dist)
 553                                                 {
 554                                                         info->bestdist = dist;
 555                                                         VectorScale(point, (info->radius / dist), info->nudge);
 556                                                 }
 557                                         }
 558                                 }
 559                         }
 560                 }
 561         }
 562 }
 563
 564 static void Mod_BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *info, mleaf_t *leaf)
 565 {
 566         int surfacenum, k, *mark;
 567         msurface_t *surface;
 568         for (surfacenum = 0, mark = leaf->firstleafsurface;surfacenum < leaf->numleafsurfaces;surfacenum++, mark++)
 569         {
 570                 surface = info->model->data_surfaces + *mark;
 571                 if(!surface->texture)
 572                         continue;
 573                 if (surface->texture->supercontents & SUPERCONTENTS_SOLID)
 574                 {
 575                         for (k = 0;k < surface->num_triangles;k++)
 576                         {
 577                                 Mod_BSP_FindNonSolidLocation_r_Triangle(info, surface, k);
 578                         }
 579                 }
 580         }
 581 }
 582
 583 static void Mod_BSP_FindNonSolidLocation_r(findnonsolidlocationinfo_t *info, mnode_t *node)
 584 {
 585         if (node->plane)
 586         {
 587                 float f = PlaneDiff(info->center, node->plane);
 588                 if (f >= -info->bestdist)
 589                         Mod_BSP_FindNonSolidLocation_r(info, node->children[0]);
 590                 if (f <= info->bestdist)
 591                         Mod_BSP_FindNonSolidLocation_r(info, node->children[1]);
 592         }
 593         else
 594         {
 595                 if (((mleaf_t *)node)->numleafsurfaces)
 596                         Mod_BSP_FindNonSolidLocation_r_Leaf(info, (mleaf_t *)node);
 597         }
 598 }
 599
 600 static void Mod_BSP_FindNonSolidLocation(model_t *model, const vec3_t in, vec3_t out, float radius)
 601 {
 602         int i;
 603         findnonsolidlocationinfo_t info;
 604         if (model == NULL)
 605         {
 606                 VectorCopy(in, out);
 607                 return;
 608         }
 609         VectorCopy(in, info.center);
 610         info.radius = radius;
 611         info.model = model;
 612         i = 0;
 613         do
 614         {
 615                 VectorClear(info.nudge);
 616                 info.bestdist = radius;
 617                 VectorCopy(info.center, info.absmin);
 618                 VectorCopy(info.center, info.absmax);
 619                 info.absmin[0] -= info.radius + 1;
 620                 info.absmin[1] -= info.radius + 1;
 621                 info.absmin[2] -= info.radius + 1;
 622                 info.absmax[0] += info.radius + 1;
 623                 info.absmax[1] += info.radius + 1;
 624                 info.absmax[2] += info.radius + 1;
 625                 Mod_BSP_FindNonSolidLocation_r(&info, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
 626                 VectorAdd(info.center, info.nudge, info.center);
 627         }
 628         while (info.bestdist < radius && ++i < 10);
 629         VectorCopy(info.center, out);
 630 }
 631
 632 int Mod_Q1BSP_SuperContentsFromNativeContents(int nativecontents)
 633 {
 634         switch(nativecontents)
 635         {
 636                 case CONTENTS_EMPTY:
 637                         return 0;
 638                 case CONTENTS_SOLID:
 639                         return SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
 640                 case CONTENTS_WATER:
 641                         return SUPERCONTENTS_WATER;
 642                 case CONTENTS_SLIME:
 643                         return SUPERCONTENTS_SLIME;
 644                 case CONTENTS_LAVA:
 645                         return SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
 646                 case CONTENTS_SKY:
 647                         return SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE; // to match behaviour of Q3 maps, let sky count as opaque
 648         }
 649         return 0;
 650 }
 651
 652 int Mod_Q1BSP_NativeContentsFromSuperContents(int supercontents)
 653 {
 654         if (supercontents & (SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY))
 655                 return CONTENTS_SOLID;
 656         if (supercontents & SUPERCONTENTS_SKY)
 657                 return CONTENTS_SKY;
 658         if (supercontents & SUPERCONTENTS_LAVA)
 659                 return CONTENTS_LAVA;
 660         if (supercontents & SUPERCONTENTS_SLIME)
 661                 return CONTENTS_SLIME;
 662         if (supercontents & SUPERCONTENTS_WATER)
 663                 return CONTENTS_WATER;
 664         return CONTENTS_EMPTY;
 665 }
 666
 667 typedef struct RecursiveHullCheckTraceInfo_s
 668 {
 669         // the hull we're tracing through
 670         const hull_t *hull;
 671
 672         // the trace structure to fill in
 673         trace_t *trace;
 674
 675         // start, end, and end - start (in model space)
 676         double start[3];
 677         double end[3];
 678         double dist[3];
 679 }
 680 RecursiveHullCheckTraceInfo_t;
 681
 682 // 1/32 epsilon to keep floating point happy
 683 #define DIST_EPSILON (0.03125)
 684
 685 #define HULLCHECKSTATE_EMPTY 0
 686 #define HULLCHECKSTATE_SOLID 1
 687 #define HULLCHECKSTATE_DONE 2
 688
 689 static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int num, double p1f, double p2f, double p1[3], double p2[3])
 690 {
 691         // status variables, these don't need to be saved on the stack when
 692         // recursing...  but are because this should be thread-safe
 693         // (note: tracing against a bbox is not thread-safe, yet)
 694         int ret;
 695         mplane_t *plane;
 696         double t1, t2;
 697
 698         // variables that need to be stored on the stack when recursing
 699         mclipnode_t *node;
 700         int p1side, p2side;
 701         double midf, mid[3];
 702
 703         // keep looping until we hit a leaf
 704         while (num >= 0)
 705         {
 706                 // find the point distances
 707                 node = t->hull->clipnodes + num;
 708                 plane = t->hull->planes + node->planenum;
 709
 710                 // axial planes can be calculated more quickly without the DotProduct
 711                 if (plane->type < 3)
 712                 {
 713                         t1 = p1[plane->type] - plane->dist;
 714                         t2 = p2[plane->type] - plane->dist;
 715                 }
 716                 else
 717                 {
 718                         t1 = DotProduct (plane->normal, p1) - plane->dist;
 719                         t2 = DotProduct (plane->normal, p2) - plane->dist;
 720                 }
 721
 722                 // negative plane distances indicate children[1] (behind plane)
 723                 p1side = t1 < 0;
 724                 p2side = t2 < 0;
 725
 726                 // if the line starts and ends on the same side of the plane, recurse
 727                 // into that child instantly
 728                 if (p1side == p2side)
 729                 {
 730 #if COLLISIONPARANOID >= 3
 731                         if (p1side)
 732                                 Con_Print("<");
 733                         else
 734                                 Con_Print(">");
 735 #endif
 736                         // loop back and process the start child
 737                         num = node->children[p1side];
 738                 }
 739                 else
 740                 {
 741                         // find the midpoint where the line crosses the plane, use the
 742                         // original line for best accuracy
 743 #if COLLISIONPARANOID >= 3
 744                         Con_Print("M");
 745 #endif
 746                         if (plane->type < 3)
 747                         {
 748                                 t1 = t->start[plane->type] - plane->dist;
 749                                 t2 = t->end[plane->type] - plane->dist;
 750                         }
 751                         else
 752                         {
 753                                 t1 = DotProduct (plane->normal, t->start) - plane->dist;
 754                                 t2 = DotProduct (plane->normal, t->end) - plane->dist;
 755                         }
 756                         midf = t1 / (t1 - t2);
 757                         midf = bound(p1f, midf, p2f);
 758                         VectorMA(t->start, midf, t->dist, mid);
 759
 760                         // we now have a mid point, essentially splitting the line into
 761                         // the segments in the near child and the far child, we can now
 762                         // recurse those in order and get their results
 763
 764                         // recurse both sides, front side first
 765                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p1side], p1f, midf, p1, mid);
 766                         // if this side is not empty, return what it is (solid or done)
 767                         if (ret != HULLCHECKSTATE_EMPTY && !t->trace->allsolid)
 768                                 return ret;
 769
 770                         ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p2side], midf, p2f, mid, p2);
 771                         // if other side is not solid, return what it is (empty or done)
 772                         if (ret != HULLCHECKSTATE_SOLID)
 773                                 return ret;
 774
 775                         // front is air and back is solid, this is the impact point...
 776
 777                         // copy the plane information, flipping it if needed
 778                         if (p1side)
 779                         {
 780                                 t->trace->plane.dist = -plane->dist;
 781                                 VectorNegate (plane->normal, t->trace->plane.normal);
 782                         }
 783                         else
 784                         {
 785                                 t->trace->plane.dist = plane->dist;
 786                                 VectorCopy (plane->normal, t->trace->plane.normal);
 787                         }
 788
 789                         // calculate the return fraction which is nudged off the surface a bit
 790                         t1 = DotProduct(t->trace->plane.normal, t->start) - t->trace->plane.dist;
 791                         t2 = DotProduct(t->trace->plane.normal, t->end) - t->trace->plane.dist;
 792                         midf = (t1 - collision_impactnudge.value) / (t1 - t2);
 793                         t->trace->fraction = bound(0, midf, 1);
 794
 795 #if COLLISIONPARANOID >= 3
 796                         Con_Print("D");
 797 #endif
 798                         return HULLCHECKSTATE_DONE;
 799                 }
 800         }
 801
 802         // we reached a leaf contents
 803
 804         // check for empty
 805         num = Mod_Q1BSP_SuperContentsFromNativeContents(num);
 806         if (!t->trace->startfound)
 807         {
 808                 t->trace->startfound = true;
 809                 t->trace->startsupercontents |= num;
 810         }
 811         if (num & SUPERCONTENTS_LIQUIDSMASK)
 812                 t->trace->inwater = true;
 813         if (num == 0)
 814                 t->trace->inopen = true;
 815         if (num & SUPERCONTENTS_SOLID)
 816                 t->trace->hittexture = &mod_q1bsp_texture_solid;
 817         else if (num & SUPERCONTENTS_SKY)
 818                 t->trace->hittexture = &mod_q1bsp_texture_sky;
 819         else if (num & SUPERCONTENTS_LAVA)
 820                 t->trace->hittexture = &mod_q1bsp_texture_lava;
 821         else if (num & SUPERCONTENTS_SLIME)
 822                 t->trace->hittexture = &mod_q1bsp_texture_slime;
 823         else
 824                 t->trace->hittexture = &mod_q1bsp_texture_water;
 825         t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
 826         t->trace->hitsupercontents = num;
 827         if (num & t->trace->hitsupercontentsmask)
 828         {
 829                 // if the first leaf is solid, set startsolid
 830                 if (t->trace->allsolid)
 831                         t->trace->startsolid = true;
 832 #if COLLISIONPARANOID >= 3
 833                 Con_Print("S");
 834 #endif
 835                 return HULLCHECKSTATE_SOLID;
 836         }
 837         else
 838         {
 839                 t->trace->allsolid = false;
 840 #if COLLISIONPARANOID >= 3
 841                 Con_Print("E");
 842 #endif
 843                 return HULLCHECKSTATE_EMPTY;
 844         }
 845 }
 846
 847 //#if COLLISIONPARANOID < 2
 848 static int Mod_Q1BSP_RecursiveHullCheckPoint(RecursiveHullCheckTraceInfo_t *t, int num)
 849 {
 850         mplane_t *plane;
 851         mclipnode_t *nodes = t->hull->clipnodes;
 852         mplane_t *planes = t->hull->planes;
 853         vec3_t point;
 854         VectorCopy(t->start, point);
 855         while (num >= 0)
 856         {
 857                 plane = planes + nodes[num].planenum;
 858                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
 859         }
 860         num = Mod_Q1BSP_SuperContentsFromNativeContents(num);
 861         t->trace->startsupercontents |= num;
 862         if (num & SUPERCONTENTS_LIQUIDSMASK)
 863                 t->trace->inwater = true;
 864         if (num == 0)
 865                 t->trace->inopen = true;
 866         if (num & t->trace->hitsupercontentsmask)
 867         {
 868                 t->trace->allsolid = t->trace->startsolid = true;
 869                 return HULLCHECKSTATE_SOLID;
 870         }
 871         else
 872         {
 873                 t->trace->allsolid = t->trace->startsolid = false;
 874                 return HULLCHECKSTATE_EMPTY;
 875         }
 876 }
 877 //#endif
 878
 879 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)
 880 {
 881         RecursiveHullCheckTraceInfo_t rhc;
 882
 883         memset(&rhc, 0, sizeof(rhc));
 884         memset(trace, 0, sizeof(trace_t));
 885         rhc.trace = trace;
 886         rhc.trace->fraction = 1;
 887         rhc.trace->allsolid = true;
 888         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 889         VectorCopy(start, rhc.start);
 890         VectorCopy(start, rhc.end);
 891         Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 892 }
 893
 894 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);
 895
 896 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)
 897 {
 898         RecursiveHullCheckTraceInfo_t rhc;
 899
 900         if (VectorCompare(start, end))
 901         {
 902                 Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 903                 return;
 904         }
 905
 906         // 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...
 907         if (sv_gameplayfix_q1bsptracelinereportstexture.integer)
 908         {
 909                 Mod_Q1BSP_TraceLineAgainstSurfaces(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 910                 return;
 911         }
 912
 913         memset(&rhc, 0, sizeof(rhc));
 914         memset(trace, 0, sizeof(trace_t));
 915         rhc.trace = trace;
 916         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 917         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 918         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 919         rhc.trace->fraction = 1;
 920         rhc.trace->allsolid = true;
 921         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 922         VectorCopy(start, rhc.start);
 923         VectorCopy(end, rhc.end);
 924         VectorSubtract(rhc.end, rhc.start, rhc.dist);
 925 #if COLLISIONPARANOID >= 2
 926         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]);
 927         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 928         {
 929
 930                 double test[3];
 931                 trace_t testtrace;
 932                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
 933                 memset(&testtrace, 0, sizeof(trace_t));
 934                 rhc.trace = &testtrace;
 935                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 936                 rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 937                 rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 938                 rhc.trace->fraction = 1;
 939                 rhc.trace->allsolid = true;
 940                 VectorCopy(test, rhc.start);
 941                 VectorCopy(test, rhc.end);
 942                 VectorClear(rhc.dist);
 943                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 944                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
 945                 if (!trace->startsolid && testtrace.startsolid)
 946                         Con_Printf(" - ended in solid!\n");
 947         }
 948         Con_Print("\n");
 949 #else
 950         if (VectorLength2(rhc.dist))
 951                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
 952         else
 953                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 954 #endif
 955 }
 956
 957 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)
 958 {
 959         // this function currently only supports same size start and end
 960         double boxsize[3];
 961         RecursiveHullCheckTraceInfo_t rhc;
 962
 963         if (VectorCompare(boxmins, boxmaxs))
 964         {
 965                 if (VectorCompare(start, end))
 966                         Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 967                 else
 968                         Mod_Q1BSP_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 969                 return;
 970         }
 971
 972         memset(&rhc, 0, sizeof(rhc));
 973         memset(trace, 0, sizeof(trace_t));
 974         rhc.trace = trace;
 975         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
 976         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
 977         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
 978         rhc.trace->fraction = 1;
 979         rhc.trace->allsolid = true;
 980         VectorSubtract(boxmaxs, boxmins, boxsize);
 981         if (boxsize[0] < mod_q1bsp_zero_hullsize_cutoff.value)
 982                 rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
 983         else if (model->brush.ishlbsp)
 984         {
 985                 // LadyHavoc: this has to have a minor tolerance (the .1) because of
 986                 // minor float precision errors from the box being transformed around
 987                 if (boxsize[0] < 32.1)
 988                 {
 989                         if (boxsize[2] < 54) // pick the nearest of 36 or 72
 990                                 rhc.hull = &model->brushq1.hulls[3]; // 32x32x36
 991                         else
 992                                 rhc.hull = &model->brushq1.hulls[1]; // 32x32x72
 993                 }
 994                 else
 995                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x64
 996         }
 997         else
 998         {
 999                 // LadyHavoc: this has to have a minor tolerance (the .1) because of
1000                 // minor float precision errors from the box being transformed around
1001                 if (boxsize[0] < 32.1)
1002                         rhc.hull = &model->brushq1.hulls[1]; // 32x32x56
1003                 else
1004                         rhc.hull = &model->brushq1.hulls[2]; // 64x64x88
1005         }
1006         VectorMAMAM(1, start, 1, boxmins, -1, rhc.hull->clip_mins, rhc.start);
1007         VectorMAMAM(1, end, 1, boxmins, -1, rhc.hull->clip_mins, rhc.end);
1008         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1009 #if COLLISIONPARANOID >= 2
1010         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]);
1011         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1012         {
1013
1014                 double test[3];
1015                 trace_t testtrace;
1016                 VectorLerp(rhc.start, rhc.trace->fraction, rhc.end, test);
1017                 memset(&testtrace, 0, sizeof(trace_t));
1018                 rhc.trace = &testtrace;
1019                 rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1020                 rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1021                 rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1022                 rhc.trace->fraction = 1;
1023                 rhc.trace->allsolid = true;
1024                 VectorCopy(test, rhc.start);
1025                 VectorCopy(test, rhc.end);
1026                 VectorClear(rhc.dist);
1027                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1028                 //Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, test, test);
1029                 if (!trace->startsolid && testtrace.startsolid)
1030                         Con_Printf(" - ended in solid!\n");
1031         }
1032         Con_Print("\n");
1033 #else
1034         if (VectorLength2(rhc.dist))
1035                 Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1036         else
1037                 Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
1038 #endif
1039 }
1040
1041 static int Mod_Q1BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
1042 {
1043         int num = model->brushq1.hulls[0].firstclipnode;
1044         mplane_t *plane;
1045         mclipnode_t *nodes = model->brushq1.hulls[0].clipnodes;
1046         mplane_t *planes = model->brushq1.hulls[0].planes;
1047         while (num >= 0)
1048         {
1049                 plane = planes + nodes[num].planenum;
1050                 num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
1051         }
1052         return Mod_Q1BSP_SuperContentsFromNativeContents(num);
1053 }
1054
1055 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)
1056 {
1057 #if 1
1058         colbrushf_t cbox;
1059         colplanef_t cbox_planes[6];
1060         cbox.isaabb = true;
1061         cbox.hasaabbplanes = true;
1062         cbox.supercontents = boxsupercontents;
1063         cbox.numplanes = 6;
1064         cbox.numpoints = 0;
1065         cbox.numtriangles = 0;
1066         cbox.planes = cbox_planes;
1067         cbox.points = NULL;
1068         cbox.elements = NULL;
1069         cbox.markframe = 0;
1070         cbox.mins[0] = 0;
1071         cbox.mins[1] = 0;
1072         cbox.mins[2] = 0;
1073         cbox.maxs[0] = 0;
1074         cbox.maxs[1] = 0;
1075         cbox.maxs[2] = 0;
1076         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];
1077         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];
1078         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];
1079         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];
1080         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];
1081         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];
1082         cbox_planes[0].q3surfaceflags = boxq3surfaceflags;cbox_planes[0].texture = boxtexture;
1083         cbox_planes[1].q3surfaceflags = boxq3surfaceflags;cbox_planes[1].texture = boxtexture;
1084         cbox_planes[2].q3surfaceflags = boxq3surfaceflags;cbox_planes[2].texture = boxtexture;
1085         cbox_planes[3].q3surfaceflags = boxq3surfaceflags;cbox_planes[3].texture = boxtexture;
1086         cbox_planes[4].q3surfaceflags = boxq3surfaceflags;cbox_planes[4].texture = boxtexture;
1087         cbox_planes[5].q3surfaceflags = boxq3surfaceflags;cbox_planes[5].texture = boxtexture;
1088         memset(trace, 0, sizeof(trace_t));
1089         trace->hitsupercontentsmask = hitsupercontentsmask;
1090         trace->skipsupercontentsmask = skipsupercontentsmask;
1091         trace->skipmaterialflagsmask = skipmaterialflagsmask;
1092         trace->fraction = 1;
1093         Collision_TraceLineBrushFloat(trace, start, end, &cbox, &cbox);
1094 #else
1095         RecursiveHullCheckTraceInfo_t rhc;
1096         static hull_t box_hull;
1097         static mclipnode_t box_clipnodes[6];
1098         static mplane_t box_planes[6];
1099         // fill in a default trace
1100         memset(&rhc, 0, sizeof(rhc));
1101         memset(trace, 0, sizeof(trace_t));
1102         //To keep everything totally uniform, bounding boxes are turned into small
1103         //BSP trees instead of being compared directly.
1104         // create a temp hull from bounding box sizes
1105         box_planes[0].dist = cmaxs[0] - mins[0];
1106         box_planes[1].dist = cmins[0] - maxs[0];
1107         box_planes[2].dist = cmaxs[1] - mins[1];
1108         box_planes[3].dist = cmins[1] - maxs[1];
1109         box_planes[4].dist = cmaxs[2] - mins[2];
1110         box_planes[5].dist = cmins[2] - maxs[2];
1111 #if COLLISIONPARANOID >= 3
1112         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]);
1113 #endif
1114
1115         if (box_hull.clipnodes == NULL)
1116         {
1117                 int i, side;
1118
1119                 //Set up the planes and clipnodes so that the six floats of a bounding box
1120                 //can just be stored out and get a proper hull_t structure.
1121
1122                 box_hull.clipnodes = box_clipnodes;
1123                 box_hull.planes = box_planes;
1124                 box_hull.firstclipnode = 0;
1125                 box_hull.lastclipnode = 5;
1126
1127                 for (i = 0;i < 6;i++)
1128                 {
1129                         box_clipnodes[i].planenum = i;
1130
1131                         side = i&1;
1132
1133                         box_clipnodes[i].children[side] = CONTENTS_EMPTY;
1134                         if (i != 5)
1135                                 box_clipnodes[i].children[side^1] = i + 1;
1136                         else
1137                                 box_clipnodes[i].children[side^1] = CONTENTS_SOLID;
1138
1139                         box_planes[i].type = i>>1;
1140                         box_planes[i].normal[i>>1] = 1;
1141                 }
1142         }
1143
1144         // trace a line through the generated clipping hull
1145         //rhc.boxsupercontents = boxsupercontents;
1146         rhc.hull = &box_hull;
1147         rhc.trace = trace;
1148         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1149         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1150         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1151         rhc.trace->fraction = 1;
1152         rhc.trace->allsolid = true;
1153         VectorCopy(start, rhc.start);
1154         VectorCopy(end, rhc.end);
1155         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1156         Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
1157         //VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1158         if (rhc.trace->startsupercontents)
1159                 rhc.trace->startsupercontents = boxsupercontents;
1160 #endif
1161 }
1162
1163 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)
1164 {
1165         memset(trace, 0, sizeof(trace_t));
1166         trace->fraction = 1;
1167         trace->hitsupercontentsmask = hitsupercontentsmask;
1168         trace->skipsupercontentsmask = skipsupercontentsmask;
1169         trace->skipmaterialflagsmask = skipmaterialflagsmask;
1170         if (BoxesOverlap(start, start, cmins, cmaxs))
1171         {
1172                 trace->startsupercontents |= boxsupercontents;
1173                 if ((hitsupercontentsmask & boxsupercontents) && !(skipsupercontentsmask & boxsupercontents))
1174                 {
1175                         trace->startsolid = true;
1176                         trace->allsolid = true;
1177                 }
1178         }
1179 }
1180
1181 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)
1182 {
1183         trace_t trace;
1184         Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
1185         return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
1186 }
1187
1188 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)
1189 {
1190         int side;
1191         float front, back;
1192         float mid, distz = endz - startz;
1193
1194         while (node->plane)
1195         {
1196                 switch (node->plane->type)
1197                 {
1198                 case PLANE_X:
1199                         node = node->children[x < node->plane->dist];
1200                         continue; // loop back and process the new node
1201                 case PLANE_Y:
1202                         node = node->children[y < node->plane->dist];
1203                         continue; // loop back and process the new node
1204                 case PLANE_Z:
1205                         side = startz < node->plane->dist;
1206                         if ((endz < node->plane->dist) == side)
1207                         {
1208                                 node = node->children[side];
1209                                 continue; // loop back and process the new node
1210                         }
1211                         // found an intersection
1212                         mid = node->plane->dist;
1213                         break;
1214                 default:
1215                         back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
1216                         front += startz * node->plane->normal[2];
1217                         back += endz * node->plane->normal[2];
1218                         side = front < node->plane->dist;
1219                         if ((back < node->plane->dist) == side)
1220                         {
1221                                 node = node->children[side];
1222                                 continue; // loop back and process the new node
1223                         }
1224                         // found an intersection
1225                         mid = startz + distz * (front - node->plane->dist) / (front - back);
1226                         break;
1227                 }
1228
1229                 // go down front side
1230                 if (node->children[side]->plane && Mod_BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, node->children[side], x, y, startz, mid))
1231                         return true;    // hit something
1232
1233                 // check for impact on this node
1234                 if (node->numsurfaces)
1235                 {
1236                         unsigned int i;
1237                         int dsi, dti, lmwidth, lmheight;
1238                         float ds, dt;
1239                         msurface_t *surface;
1240                         unsigned char *lightmap;
1241                         int maps, line3, size3;
1242                         float dsfrac;
1243                         float dtfrac;
1244                         float scale, w, w00, w01, w10, w11;
1245
1246                         surface = model->data_surfaces + node->firstsurface;
1247                         for (i = 0;i < node->numsurfaces;i++, surface++)
1248                         {
1249                                 if(!surface->texture)
1250                                         continue;
1251                                 if (!(surface->texture->basematerialflags & MATERIALFLAG_WALL) || !surface->lightmapinfo || !surface->lightmapinfo->samples)
1252                                         continue;       // no lightmaps
1253
1254                                 // location we want to sample in the lightmap
1255                                 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;
1256                                 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;
1257
1258                                 // check the bounds
1259                                 // thanks to jitspoe for pointing out that this int cast was
1260                                 // rounding toward zero, so we floor it
1261                                 dsi = (int)floor(ds);
1262                                 dti = (int)floor(dt);
1263                                 lmwidth = ((surface->lightmapinfo->extents[0]>>4)+1);
1264                                 lmheight = ((surface->lightmapinfo->extents[1]>>4)+1);
1265
1266                                 // is it in bounds?
1267                                 // we have to tolerate a position of lmwidth-1 for some rare
1268                                 // cases - in which case the sampling position still gets
1269                                 // clamped but the color gets interpolated to that edge.
1270                                 if (dsi >= 0 && dsi < lmwidth && dti >= 0 && dti < lmheight)
1271                                 {
1272                                         // in the rare cases where we're sampling slightly off
1273                                         // the polygon, clamp the sampling position (we can still
1274                                         // interpolate outside it, where it becomes extrapolation)
1275                                         if (dsi < 0)
1276                                                 dsi = 0;
1277                                         if (dti < 0)
1278                                                 dti = 0;
1279                                         if (dsi > lmwidth-2)
1280                                                 dsi = lmwidth-2;
1281                                         if (dti > lmheight-2)
1282                                                 dti = lmheight-2;
1283
1284                                         // calculate bilinear interpolation factors
1285                                         // and also multiply by fixedpoint conversion factors to
1286                                         // compensate for lightmaps being 0-255 (as 0-2), we use
1287                                         // r_refdef.scene.rtlightstylevalue here which is already
1288                                         // 0.000-2.148 range
1289                                         // (if we used r_refdef.scene.lightstylevalue this
1290                                         //  divisor would be 32768 rather than 128)
1291                                         dsfrac = ds - dsi;
1292                                         dtfrac = dt - dti;
1293                                         w00 = (1 - dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1294                                         w01 = (    dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
1295                                         w10 = (1 - dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1296                                         w11 = (    dsfrac) * (    dtfrac) * (1.0f / 128.0f);
1297
1298                                         // values for pointer math
1299                                         line3 = lmwidth * 3; // LadyHavoc: *3 for colored lighting
1300                                         size3 = lmwidth * lmheight * 3; // LadyHavoc: *3 for colored lighting
1301
1302                                         // look up the pixel
1303                                         lightmap = surface->lightmapinfo->samples + dti * line3 + dsi*3; // LadyHavoc: *3 for colored lighting
1304
1305                                         // bilinear filter each lightmap style, and sum them
1306                                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++)
1307                                         {
1308                                                 scale = r_refdef.scene.rtlightstylevalue[surface->lightmapinfo->styles[maps]];
1309                                                 w = w00 * scale;VectorMA(ambientcolor, w, lightmap            , ambientcolor);
1310                                                 w = w01 * scale;VectorMA(ambientcolor, w, lightmap + 3        , ambientcolor);
1311                                                 w = w10 * scale;VectorMA(ambientcolor, w, lightmap + line3    , ambientcolor);
1312                                                 w = w11 * scale;VectorMA(ambientcolor, w, lightmap + line3 + 3, ambientcolor);
1313                                                 lightmap += size3;
1314                                         }
1315
1316                                         return true; // success
1317                                 }
1318                         }
1319                 }
1320
1321                 // go down back side
1322                 node = node->children[side ^ 1];
1323                 startz = mid;
1324                 distz = endz - startz;
1325                 // loop back and process the new node
1326         }
1327
1328         // did not hit anything
1329         return false;
1330 }
1331
1332 static void Mod_BSP_LightPoint(model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
1333 {
1334         // pretend lighting is coming down from above (due to lack of a lightgrid to know primary lighting direction)
1335         VectorSet(diffusenormal, 0, 0, 1);
1336
1337         if (!model->brushq1.lightdata)
1338         {
1339                 VectorSet(ambientcolor, 1, 1, 1);
1340                 VectorSet(diffusecolor, 0, 0, 0);
1341                 return;
1342         }
1343
1344         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);
1345 }
1346
1347 static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const model_t *model, const mnode_t *node, double mid[3])
1348 {
1349         unsigned int i;
1350         int j;
1351         int k;
1352         const msurface_t *surface;
1353         float normal[3];
1354         float v0[3];
1355         float v1[3];
1356         float edgedir[3];
1357         float edgenormal[3];
1358         float p[4];
1359         float midf;
1360         float t1;
1361         float t2;
1362         VectorCopy(mid, p);
1363         p[3] = 1;
1364         surface = model->data_surfaces + node->firstsurface;
1365         for (i = 0;i < node->numsurfaces;i++, surface++)
1366         {
1367                 if(!surface->texture)
1368                         continue;
1369                 // skip surfaces whose bounding box does not include the point
1370 //              if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
1371 //                      continue;
1372                 // skip faces with contents we don't care about
1373                 if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
1374                         continue;
1375                 // ignore surfaces matching the skipsupercontentsmask (this is rare)
1376                 if (t->trace->skipsupercontentsmask & surface->texture->supercontents)
1377                         continue;
1378                 // skip surfaces matching the skipmaterialflagsmask (e.g. MATERIALFLAG_NOSHADOW)
1379                 if (t->trace->skipmaterialflagsmask & surface->texture->currentmaterialflags)
1380                         continue;
1381                 // get the surface normal - since it is flat we know any vertex normal will suffice
1382                 VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
1383                 // skip backfaces
1384                 if (DotProduct(t->dist, normal) > 0)
1385                         continue;
1386                 // iterate edges and see if the point is outside one of them
1387                 for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
1388                 {
1389                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
1390                         VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
1391                         VectorSubtract(v0, v1, edgedir);
1392                         CrossProduct(edgedir, normal, edgenormal);
1393                         if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
1394                                 break;
1395                 }
1396                 // if the point is outside one of the edges, it is not within the surface
1397                 if (j < surface->num_vertices)
1398                         continue;
1399
1400                 // we hit a surface, this is the impact point...
1401                 VectorCopy(normal, t->trace->plane.normal);
1402                 t->trace->plane.dist = DotProduct(normal, p);
1403
1404                 // calculate the return fraction which is nudged off the surface a bit
1405                 t1 = DotProduct(t->start, t->trace->plane.normal) - t->trace->plane.dist;
1406                 t2 = DotProduct(t->end, t->trace->plane.normal) - t->trace->plane.dist;
1407                 midf = (t1 - collision_impactnudge.value) / (t1 - t2);
1408                 t->trace->fraction = bound(0, midf, 1);
1409
1410                 t->trace->hittexture = surface->texture->currentframe;
1411                 t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
1412                 t->trace->hitsupercontents = t->trace->hittexture->supercontents;
1413                 return surface->texture->currentframe;
1414         }
1415         return NULL;
1416 }
1417
1418 static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
1419 {
1420         const mplane_t *plane;
1421         double t1, t2;
1422         int side;
1423         double midf, mid[3];
1424         const mleaf_t *leaf;
1425
1426         while (node->plane)
1427         {
1428                 plane = node->plane;
1429                 if (plane->type < 3)
1430                 {
1431                         t1 = p1[plane->type] - plane->dist;
1432                         t2 = p2[plane->type] - plane->dist;
1433                 }
1434                 else
1435                 {
1436                         t1 = DotProduct (plane->normal, p1) - plane->dist;
1437                         t2 = DotProduct (plane->normal, p2) - plane->dist;
1438                 }
1439                 if (t1 < 0)
1440                 {
1441                         if (t2 < 0)
1442                         {
1443                                 node = node->children[1];
1444                                 continue;
1445                         }
1446                         side = 1;
1447                 }
1448                 else
1449                 {
1450                         if (t2 >= 0)
1451                         {
1452                                 node = node->children[0];
1453                                 continue;
1454                         }
1455                         side = 0;
1456                 }
1457
1458                 // the line intersects, find intersection point
1459                 // LadyHavoc: this uses the original trace for maximum accuracy
1460                 if (plane->type < 3)
1461                 {
1462                         t1 = t->start[plane->type] - plane->dist;
1463                         t2 = t->end[plane->type] - plane->dist;
1464                 }
1465                 else
1466                 {
1467                         t1 = DotProduct (plane->normal, t->start) - plane->dist;
1468                         t2 = DotProduct (plane->normal, t->end) - plane->dist;
1469                 }
1470
1471                 midf = t1 / (t1 - t2);
1472                 VectorMA(t->start, midf, t->dist, mid);
1473
1474                 // recurse both sides, front side first, return if we hit a surface
1475                 if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
1476                         return HULLCHECKSTATE_DONE;
1477
1478                 // test each surface on the node
1479                 Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
1480                 if (t->trace->hittexture)
1481                         return HULLCHECKSTATE_DONE;
1482
1483                 // recurse back side
1484                 return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
1485         }
1486         leaf = (const mleaf_t *)node;
1487         side = Mod_Q1BSP_SuperContentsFromNativeContents(leaf->contents);
1488         if (!t->trace->startfound)
1489         {
1490                 t->trace->startfound = true;
1491                 t->trace->startsupercontents |= side;
1492         }
1493         if (side & SUPERCONTENTS_LIQUIDSMASK)
1494                 t->trace->inwater = true;
1495         if (side == 0)
1496                 t->trace->inopen = true;
1497         if (side & t->trace->hitsupercontentsmask)
1498         {
1499                 // if the first leaf is solid, set startsolid
1500                 if (t->trace->allsolid)
1501                         t->trace->startsolid = true;
1502                 return HULLCHECKSTATE_SOLID;
1503         }
1504         else
1505         {
1506                 t->trace->allsolid = false;
1507                 return HULLCHECKSTATE_EMPTY;
1508         }
1509 }
1510
1511 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)
1512 {
1513         RecursiveHullCheckTraceInfo_t rhc;
1514
1515         memset(&rhc, 0, sizeof(rhc));
1516         memset(trace, 0, sizeof(trace_t));
1517         rhc.trace = trace;
1518         rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
1519         rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
1520         rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
1521         rhc.trace->fraction = 1;
1522         rhc.trace->allsolid = true;
1523         rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
1524         VectorCopy(start, rhc.start);
1525         VectorCopy(end, rhc.end);
1526         VectorSubtract(rhc.end, rhc.start, rhc.dist);
1527         Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
1528         VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
1529 }
1530
1531 static void Mod_BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
1532 {
1533         int c;
1534         unsigned char *outstart = out;
1535         while (out < outend)
1536         {
1537                 if (in == inend)
1538                 {
1539                         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));
1540                         return;
1541                 }
1542                 c = *in++;
1543                 if (c)
1544                         *out++ = c;
1545                 else
1546                 {
1547                         if (in == inend)
1548                         {
1549                                 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));
1550                                 return;
1551                         }
1552                         for (c = *in++;c > 0;c--)
1553                         {
1554                                 if (out == outend)
1555                                 {
1556                                         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));
1557                                         return;
1558                                 }
1559                                 *out++ = 0;
1560                         }
1561                 }
1562         }
1563 }
1564
1565 /*
1566 =============
1567 Mod_Q1BSP_LoadSplitSky
1568
1569 A sky texture is 256*128, with the right side being a masked overlay
1570 ==============
1571 */
1572 static void Mod_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesperpixel)
1573 {
1574         int x, y;
1575         int w = width/2;
1576         int h = height;
1577         unsigned int *solidpixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1578         unsigned int *alphapixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
1579
1580         // allocate a texture pool if we need it
1581         if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
1582                 loadmodel->texturepool = R_AllocTexturePool();
1583
1584         if (bytesperpixel == 4)
1585         {
1586                 for (y = 0;y < h;y++)
1587                 {
1588                         for (x = 0;x < w;x++)
1589                         {
1590                                 solidpixels[y*w+x] = ((unsigned *)src)[y*width+x+w];
1591                                 alphapixels[y*w+x] = ((unsigned *)src)[y*width+x];
1592                         }
1593                 }
1594         }
1595         else
1596         {
1597                 // make an average value for the back to avoid
1598                 // a fringe on the top level
1599                 int p, r, g, b;
1600                 union
1601                 {
1602                         unsigned int i;
1603                         unsigned char b[4];
1604                 }
1605                 bgra;
1606                 r = g = b = 0;
1607                 for (y = 0;y < h;y++)
1608                 {
1609                         for (x = 0;x < w;x++)
1610                         {
1611                                 p = src[x*width+y+w];
1612                                 r += palette_rgb[p][0];
1613                                 g += palette_rgb[p][1];
1614                                 b += palette_rgb[p][2];
1615                         }
1616                 }
1617                 bgra.b[2] = r/(w*h);
1618                 bgra.b[1] = g/(w*h);
1619                 bgra.b[0] = b/(w*h);
1620                 bgra.b[3] = 0;
1621                 for (y = 0;y < h;y++)
1622                 {
1623                         for (x = 0;x < w;x++)
1624                         {
1625                                 solidpixels[y*w+x] = palette_bgra_complete[src[y*width+x+w]];
1626                                 p = src[y*width+x];
1627                                 alphapixels[y*w+x] = p ? palette_bgra_complete[p] : bgra.i;
1628                         }
1629                 }
1630         }
1631
1632         loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h, 0, 0, 0, vid.sRGB3D);
1633         loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h, 0, 0, 0, vid.sRGB3D);
1634         Mem_Free(solidpixels);
1635         Mem_Free(alphapixels);
1636 }
1637
1638 static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
1639 {
1640         int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0, firstskynoshadowtexture = 0;
1641         skinframe_t *skinframemissing;
1642         texture_t *tx, *tx2, *anims[10], *altanims[10], *currentskynoshadowtexture;
1643         texture_t backuptex;
1644         unsigned char *data, *mtdata;
1645         const char *s;
1646         char mapname[MAX_QPATH], name[MAX_QPATH];
1647         unsigned char zeroopaque[4], zerotrans[4];
1648         sizebuf_t miptexsb;
1649         char vabuf[1024];
1650         Vector4Set(zeroopaque, 0, 0, 0, 255);
1651         Vector4Set(zerotrans, 0, 0, 0, 128);
1652
1653         loadmodel->data_textures = NULL;
1654
1655         // add two slots for notexture walls and notexture liquids, and duplicate
1656         // all sky textures; sky surfaces can be shadow-casting or not, the surface
1657         // loading will choose according to the contents behind the surface
1658         // (necessary to support e1m5 logo shadow which has a SKY contents brush,
1659         // while correctly treating sky textures as occluders in other situations).
1660         if (sb->cursize)
1661         {
1662                 int numsky = 0;
1663                 size_t watermark;
1664                 nummiptex = MSG_ReadLittleLong(sb);
1665                 loadmodel->num_textures = nummiptex + 2;
1666                 // save the position so we can go back to it
1667                 watermark = sb->readcount;
1668                 for (i = 0; i < nummiptex; i++)
1669                 {
1670                         doffset = MSG_ReadLittleLong(sb);
1671                         if (r_nosurftextures.integer)
1672                                 continue;
1673                         if (doffset == -1)
1674                         {
1675                                 Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
1676                                 continue;
1677                         }
1678
1679                         MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
1680
1681                         // copy name, but only up to 16 characters
1682                         // (the output buffer can hold more than this, but the input buffer is
1683                         //  only 16)
1684                         for (j = 0; j < 16; j++)
1685                                 name[j] = MSG_ReadByte(&miptexsb);
1686                         name[j] = 0;
1687                         // pretty up the buffer (replacing any trailing garbage with 0)
1688                         for (j = (int)strlen(name); j < 16; j++)
1689                                 name[j] = 0;
1690
1691                         if (!strncmp(name, "sky", 3))
1692                                 numsky++;
1693                 }
1694
1695                 // bump it back to where we started parsing
1696                 sb->readcount = (int)watermark;
1697
1698                 firstskynoshadowtexture = loadmodel->num_textures;
1699                 loadmodel->num_textures += numsky;
1700         }
1701         else
1702         {
1703                 loadmodel->num_textures = 2;
1704                 firstskynoshadowtexture = loadmodel->num_textures;
1705         }
1706         loadmodel->num_texturesperskin = loadmodel->num_textures;
1707
1708         loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
1709
1710         // we'll be writing to these in parallel for sky textures
1711         currentskynoshadowtexture = loadmodel->data_textures + firstskynoshadowtexture;
1712
1713         // fill out all slots with notexture
1714         skinframemissing = R_SkinFrame_LoadMissing();
1715         for (i = 0, tx = loadmodel->data_textures;i < loadmodel->num_textures;i++, tx++)
1716         {
1717                 strlcpy(tx->name, "NO TEXTURE FOUND", sizeof(tx->name));
1718                 tx->width = 16;
1719                 tx->height = 16;
1720                 tx->basealpha = 1.0f;
1721                 tx->materialshaderpass = tx->shaderpasses[0] = Mod_CreateShaderPass(loadmodel->mempool, skinframemissing);
1722                 tx->materialshaderpass->skinframes[0] = skinframemissing;
1723                 tx->currentskinframe = skinframemissing;
1724                 tx->basematerialflags = MATERIALFLAG_WALL;
1725                 if (i == loadmodel->num_textures - 1)
1726                 {
1727                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1728                         tx->supercontents = mod_q1bsp_texture_water.supercontents;
1729                         tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1730                 }
1731                 else
1732                 {
1733                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1734                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1735                 }
1736                 tx->currentframe = tx;
1737
1738                 // clear water settings
1739                 tx->reflectmin = 0;
1740                 tx->reflectmax = 1;
1741                 tx->refractive_index = mod_q3shader_default_refractive_index.value;
1742                 tx->refractfactor = 1;
1743                 Vector4Set(tx->refractcolor4f, 1, 1, 1, 1);
1744                 tx->reflectfactor = 1;
1745                 Vector4Set(tx->reflectcolor4f, 1, 1, 1, 1);
1746                 tx->r_water_wateralpha = 1;
1747                 tx->offsetmapping = OFFSETMAPPING_DEFAULT;
1748                 tx->offsetscale = 1;
1749                 tx->offsetbias = 0;
1750                 tx->specularscalemod = 1;
1751                 tx->specularpowermod = 1;
1752                 tx->transparentsort = TRANSPARENTSORT_DISTANCE;
1753                 // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
1754                 // JUST GREP FOR "specularscalemod = 1".
1755         }
1756
1757         if (!sb->cursize)
1758         {
1759                 Con_Printf("%s: no miptex lump to load textures from\n", loadmodel->name);
1760                 return;
1761         }
1762
1763         s = loadmodel->name;
1764         if (!strncasecmp(s, "maps/", 5))
1765                 s += 5;
1766         FS_StripExtension(s, mapname, sizeof(mapname));
1767
1768         // LadyHavoc: mostly rewritten map texture loader
1769         for (i = 0;i < nummiptex;i++)
1770         {
1771                 doffset = MSG_ReadLittleLong(sb);
1772                 if (r_nosurftextures.integer)
1773                         continue;
1774                 if (doffset == -1)
1775                 {
1776                         Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
1777                         continue;
1778                 }
1779
1780                 MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
1781
1782                 // copy name, but only up to 16 characters
1783                 // (the output buffer can hold more than this, but the input buffer is
1784                 //  only 16)
1785                 for (j = 0;j < 16;j++)
1786                         name[j] = MSG_ReadByte(&miptexsb);
1787                 name[j] = 0;
1788                 // pretty up the buffer (replacing any trailing garbage with 0)
1789                 for (j = (int)strlen(name);j < 16;j++)
1790                         name[j] = 0;
1791
1792                 if (!name[0])
1793                 {
1794                         dpsnprintf(name, sizeof(name), "unnamed%i", i);
1795                         Con_DPrintf("%s: warning: renaming unnamed texture to %s\n", loadmodel->name, name);
1796                 }
1797
1798                 mtwidth = MSG_ReadLittleLong(&miptexsb);
1799                 mtheight = MSG_ReadLittleLong(&miptexsb);
1800                 mtdata = NULL;
1801                 j = MSG_ReadLittleLong(&miptexsb);
1802                 if (j)
1803                 {
1804                         // texture included
1805                         if (j < 40 || j + mtwidth * mtheight > miptexsb.cursize)
1806                         {
1807                                 Con_Printf("%s: Texture \"%s\" is corrupt or incomplete\n", loadmodel->name, name);
1808                                 continue;
1809                         }
1810                         mtdata = miptexsb.data + j;
1811                 }
1812
1813                 if ((mtwidth & 15) || (mtheight & 15))
1814                         Con_DPrintf("%s: warning: texture \"%s\" is not 16 aligned\n", loadmodel->name, name);
1815
1816                 // LadyHavoc: force all names to lowercase
1817                 for (j = 0;name[j];j++)
1818                         if (name[j] >= 'A' && name[j] <= 'Z')
1819                                 name[j] += 'a' - 'A';
1820
1821                 tx = loadmodel->data_textures + i;
1822                 // 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
1823                 backuptex = loadmodel->data_textures[i];
1824                 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) ||
1825                                 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)))
1826                 {
1827                         // set the width/height fields which are used for parsing texcoords in this bsp format
1828                         tx->width = mtwidth;
1829                         tx->height = mtheight;
1830                         continue;
1831                 }
1832                 // no luck with loading shaders or external textures - restore the in-progress texture loading
1833                 loadmodel->data_textures[i] = backuptex;
1834
1835                 strlcpy(tx->name, name, sizeof(tx->name));
1836                 tx->width = mtwidth;
1837                 tx->height = mtheight;
1838                 tx->basealpha = 1.0f;
1839
1840                 // start out with no animation
1841                 tx->currentframe = tx;
1842                 tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
1843
1844                 if (tx->name[0] == '*')
1845                 {
1846                         if (!strncmp(tx->name, "*lava", 5))
1847                         {
1848                                 tx->supercontents = mod_q1bsp_texture_lava.supercontents;
1849                                 tx->surfaceflags = mod_q1bsp_texture_lava.surfaceflags;
1850                         }
1851                         else if (!strncmp(tx->name, "*slime", 6))
1852                         {
1853                                 tx->supercontents = mod_q1bsp_texture_slime.supercontents;
1854                                 tx->surfaceflags = mod_q1bsp_texture_slime.surfaceflags;
1855                         }
1856                         else
1857                         {
1858                                 tx->supercontents = mod_q1bsp_texture_water.supercontents;
1859                                 tx->surfaceflags = mod_q1bsp_texture_water.surfaceflags;
1860                         }
1861                 }
1862                 else if (!strncmp(tx->name, "sky", 3))
1863                 {
1864                         tx->supercontents = mod_q1bsp_texture_sky.supercontents;
1865                         tx->surfaceflags = mod_q1bsp_texture_sky.surfaceflags;
1866                         // for the surface traceline we need to hit this surface as a solid...
1867                         tx->supercontents |= SUPERCONTENTS_SOLID;
1868                 }
1869                 else
1870                 {
1871                         tx->supercontents = mod_q1bsp_texture_solid.supercontents;
1872                         tx->surfaceflags = mod_q1bsp_texture_solid.surfaceflags;
1873                 }
1874
1875                 if (cls.state != ca_dedicated)
1876                 {
1877                         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);
1878                         if ((!skinframe &&
1879                             !(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)))
1880                                 // HACK: It loads custom skybox textures as a wall if loaded as a skinframe.
1881                                 || !strncmp(tx->name, "sky", 3))
1882                         {
1883                                 // did not find external texture via shader loading, load it from the bsp or wad3
1884                                 if (loadmodel->brush.ishlbsp)
1885                                 {
1886                                         // internal texture overrides wad
1887                                         unsigned char* pixels, * freepixels;
1888                                         pixels = freepixels = NULL;
1889                                         if (mtdata)
1890                                                 pixels = W_ConvertWAD3TextureBGRA(&miptexsb);
1891                                         if (pixels == NULL)
1892                                                 pixels = freepixels = W_GetTextureBGRA(tx->name);
1893                                         if (pixels != NULL)
1894                                         {
1895                                                 tx->width = image_width;
1896                                                 tx->height = image_height;
1897                                                 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);
1898                                         }
1899                                         if (freepixels)
1900                                                 Mem_Free(freepixels);
1901                                 }
1902                                 else if (!strncmp(tx->name, "sky", 3) && mtwidth == mtheight * 2)
1903                                 {
1904                                         data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), false, false, false, NULL);
1905                                         if (!data)
1906                                                 data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), false, false, false, NULL);
1907                                         if (data && image_width == image_height * 2)
1908                                         {
1909                                                 Mod_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
1910                                                 Mem_Free(data);
1911                                         }
1912                                         else if (mtdata != NULL)
1913                                                 Mod_Q1BSP_LoadSplitSky(mtdata, mtwidth, mtheight, 1);
1914                                 }
1915                                 else if (mtdata) // texture included
1916                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, false, r_fullbrights.integer, mtdata, tx->width, tx->height);
1917                                 // if mtdata is NULL, the "missing" texture has already been assigned to this
1918                                 // LadyHavoc: some Tenebrae textures get replaced by black
1919                                 if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1920                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, 0, 0, 0, false);
1921                                 else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1922                                         tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, 0, 0, 0, false);
1923                         }
1924                         else
1925                                 tx->materialshaderpass->skinframes[0] = skinframe;
1926                         tx->currentskinframe = tx->materialshaderpass->skinframes[0];
1927                 }
1928
1929                 tx->basematerialflags = MATERIALFLAG_WALL;
1930                 if (tx->name[0] == '*')
1931                 {
1932                         // LadyHavoc: some turbulent textures should not be affected by wateralpha
1933                         if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
1934                                 tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
1935                         else if (!strncmp(tx->name,"*lava",5)
1936                          || !strncmp(tx->name,"*teleport",9)
1937                          || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
1938                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
1939                         else
1940                                 tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
1941                         if (tx->currentskinframe != NULL && tx->currentskinframe->hasalpha)
1942                                 tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1943                 }
1944                 else if (tx->name[0] == '{') // fence textures
1945                 {
1946                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
1947                 }
1948                 else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
1949                 {
1950                         // replace the texture with black
1951                         tx->basematerialflags |= MATERIALFLAG_REFLECTION;
1952                 }
1953                 else if (!strncmp(tx->name, "sky", 3))
1954                         tx->basematerialflags = MATERIALFLAG_SKY;
1955                 else if (!strcmp(tx->name, "caulk"))
1956                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
1957                 else if (tx->currentskinframe != NULL && tx->currentskinframe->hasalpha)
1958                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1959                 tx->currentmaterialflags = tx->basematerialflags;
1960
1961                 // duplicate of sky with NOSHADOW
1962                 if (tx->basematerialflags & MATERIALFLAG_SKY)
1963                 {
1964                         *currentskynoshadowtexture = *tx;
1965                         currentskynoshadowtexture->basematerialflags |= MATERIALFLAG_NOSHADOW;
1966                         tx->skynoshadowtexture = currentskynoshadowtexture;
1967                         currentskynoshadowtexture++;
1968                 }
1969         }
1970
1971         // sequence the animations
1972         for (i = 0;i < nummiptex;i++)
1973         {
1974                 tx = loadmodel->data_textures + i;
1975                 if (!tx || tx->name[0] != '+' || tx->name[1] == 0 || tx->name[2] == 0)
1976                         continue;
1977                 num = tx->name[1];
1978                 if ((num < '0' || num > '9') && (num < 'a' || num > 'j'))
1979                 {
1980                         Con_Printf("Bad animating texture %s\n", tx->name);
1981                         continue;
1982                 }
1983                 if (tx->anim_total[0] || tx->anim_total[1])
1984                         continue;       // already sequenced
1985
1986                 // find the number of frames in the animation
1987                 memset(anims, 0, sizeof(anims));
1988                 memset(altanims, 0, sizeof(altanims));
1989
1990                 for (j = i;j < nummiptex;j++)
1991                 {
1992                         tx2 = loadmodel->data_textures + j;
1993                         if (!tx2 || tx2->name[0] != '+' || strcmp(tx2->name+2, tx->name+2))
1994                                 continue;
1995
1996                         num = tx2->name[1];
1997                         if (num >= '0' && num <= '9')
1998                                 anims[num - '0'] = tx2;
1999                         else if (num >= 'a' && num <= 'j')
2000                                 altanims[num - 'a'] = tx2;
2001                         // No need to warn otherwise - we already did above.
2002                 }
2003
2004                 max = altmax = 0;
2005                 for (j = 0;j < 10;j++)
2006                 {
2007                         if (anims[j])
2008                                 max = j + 1;
2009                         if (altanims[j])
2010                                 altmax = j + 1;
2011                 }
2012                 //Con_Printf("linking animation %s (%i:%i frames)\n\n", tx->name, max, altmax);
2013
2014                 incomplete = false;
2015                 for (j = 0;j < max;j++)
2016                 {
2017                         if (!anims[j])
2018                         {
2019                                 Con_Printf("Missing frame %i of %s\n", j, tx->name);
2020                                 incomplete = true;
2021                         }
2022                 }
2023                 for (j = 0;j < altmax;j++)
2024                 {
2025                         if (!altanims[j])
2026                         {
2027                                 Con_Printf("Missing altframe %i of %s\n", j, tx->name);
2028                                 incomplete = true;
2029                         }
2030                 }
2031                 if (incomplete)
2032                         continue;
2033
2034                 // If we have exactly one frame, something's wrong.
2035                 if (max + altmax <= 1)
2036                 {
2037                         Con_Printf("Texture %s is animated (leading +) but has only one frame\n", tx->name);
2038                 }
2039
2040                 if (altmax < 1)
2041                 {
2042                         // if there is no alternate animation, duplicate the primary
2043                         // animation into the alternate
2044                         altmax = max;
2045                         for (k = 0;k < 10;k++)
2046                                 altanims[k] = anims[k];
2047                 }
2048
2049                 if (max < 1)
2050                 {
2051                         // Warn.
2052                         Con_Printf("Missing frame 0 of %s\n", tx->name);
2053
2054                         // however, we can handle this by duplicating the alternate animation into the primary
2055                         max = altmax;
2056                         for (k = 0;k < 10;k++)
2057                                 anims[k] = altanims[k];
2058                 }
2059
2060
2061                 // link together the primary animation
2062                 for (j = 0;j < max;j++)
2063                 {
2064                         tx2 = anims[j];
2065                         tx2->animated = 1; // q1bsp
2066                         tx2->anim_total[0] = max;
2067                         tx2->anim_total[1] = altmax;
2068                         for (k = 0;k < 10;k++)
2069                         {
2070                                 tx2->anim_frames[0][k] = anims[k];
2071                                 tx2->anim_frames[1][k] = altanims[k];
2072                         }
2073                 }
2074
2075                 // if there really is an alternate anim...
2076                 if (anims[0] != altanims[0])
2077                 {
2078                         // link together the alternate animation
2079                         for (j = 0;j < altmax;j++)
2080                         {
2081                                 tx2 = altanims[j];
2082                                 tx2->animated = 1; // q1bsp
2083                                 // the primary/alternate are reversed here
2084                                 tx2->anim_total[0] = altmax;
2085                                 tx2->anim_total[1] = max;
2086                                 for (k = 0;k < 10;k++)
2087                                 {
2088                                         tx2->anim_frames[0][k] = altanims[k];
2089                                         tx2->anim_frames[1][k] = anims[k];
2090                                 }
2091                         }
2092                 }
2093         }
2094 }
2095
2096 static void Mod_Q1BSP_LoadLighting(sizebuf_t *sb)
2097 {
2098         int i;
2099         unsigned char *in, *out, *data, d;
2100         char litfilename[MAX_QPATH];
2101         char dlitfilename[MAX_QPATH];
2102         fs_offset_t filesize;
2103         if (loadmodel->brush.ishlbsp) // LadyHavoc: load the colored lighting data straight
2104         {
2105                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2106                 for (i = 0;i < sb->cursize;i++)
2107                         loadmodel->brushq1.lightdata[i] = sb->data[i] >>= 1;
2108         }
2109         else // LadyHavoc: bsp version 29 (normal white lighting)
2110         {
2111                 // LadyHavoc: hope is not lost yet, check for a .lit file to load
2112                 strlcpy (litfilename, loadmodel->name, sizeof (litfilename));
2113                 FS_StripExtension (litfilename, litfilename, sizeof (litfilename));
2114                 strlcpy (dlitfilename, litfilename, sizeof (dlitfilename));
2115                 strlcat (litfilename, ".lit", sizeof (litfilename));
2116                 strlcat (dlitfilename, ".dlit", sizeof (dlitfilename));
2117                 data = (unsigned char*) FS_LoadFile(litfilename, tempmempool, false, &filesize);
2118                 if (data)
2119                 {
2120                         if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2121                         {
2122                                 i = LittleLong(((int *)data)[1]);
2123                                 if (i == 1)
2124                                 {
2125                                         if (developer_loading.integer)
2126                                                 Con_Printf("loaded %s\n", litfilename);
2127                                         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2128                                         memcpy(loadmodel->brushq1.lightdata, data + 8, filesize - 8);
2129                                         Mem_Free(data);
2130                                         data = (unsigned char*) FS_LoadFile(dlitfilename, tempmempool, false, &filesize);
2131                                         if (data)
2132                                         {
2133                                                 if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
2134                                                 {
2135                                                         i = LittleLong(((int *)data)[1]);
2136                                                         if (i == 1)
2137                                                         {
2138                                                                 if (developer_loading.integer)
2139                                                                         Con_Printf("loaded %s\n", dlitfilename);
2140                                                                 loadmodel->brushq1.nmaplightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, filesize - 8);
2141                                                                 memcpy(loadmodel->brushq1.nmaplightdata, data + 8, filesize - 8);
2142                                                                 loadmodel->brushq3.deluxemapping_modelspace = false;
2143                                                                 loadmodel->brushq3.deluxemapping = true;
2144                                                         }
2145                                                 }
2146                                                 Mem_Free(data);
2147                                                 data = NULL;
2148                                         }
2149                                         return;
2150                                 }
2151                                 else
2152                                         Con_Printf("Unknown .lit file version (%d)\n", i);
2153                         }
2154                         else if (filesize == 8)
2155                                 Con_Print("Empty .lit file, ignoring\n");
2156                         else
2157                                 Con_Printf("Corrupt .lit file (file size %i bytes, should be %i bytes), ignoring\n", (int) filesize, (int) (8 + sb->cursize * 3));
2158                         if (data)
2159                         {
2160                                 Mem_Free(data);
2161                                 data = NULL;
2162                         }
2163                 }
2164                 // LadyHavoc: oh well, expand the white lighting data
2165                 if (!sb->cursize)
2166                         return;
2167                 loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize*3);
2168                 in = sb->data;
2169                 out = loadmodel->brushq1.lightdata;
2170                 for (i = 0;i < sb->cursize;i++)
2171                 {
2172                         d = *in++;
2173                         *out++ = d;
2174                         *out++ = d;
2175                         *out++ = d;
2176                 }
2177         }
2178 }
2179
2180 static void Mod_Q1BSP_LoadVisibility(sizebuf_t *sb)
2181 {
2182         loadmodel->brushq1.num_compressedpvs = 0;
2183         loadmodel->brushq1.data_compressedpvs = NULL;
2184         if (!sb->cursize)
2185                 return;
2186         loadmodel->brushq1.num_compressedpvs = sb->cursize;
2187         loadmodel->brushq1.data_compressedpvs = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
2188         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.data_compressedpvs);
2189 }
2190
2191 // used only for HalfLife maps
2192 static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
2193 {
2194         char key[128], value[4096];
2195         int i, j, k;
2196         if (!data)
2197                 return;
2198         if (!COM_ParseToken_Simple(&data, false, false, true))
2199                 return; // error
2200         if (com_token[0] != '{')
2201                 return; // error
2202         while (1)
2203         {
2204                 if (!COM_ParseToken_Simple(&data, false, false, true))
2205                         return; // error
2206                 if (com_token[0] == '}')
2207                         break; // end of worldspawn
2208                 if (com_token[0] == '_')
2209                         strlcpy(key, com_token + 1, sizeof(key));
2210                 else
2211                         strlcpy(key, com_token, sizeof(key));
2212                 while (key[strlen(key)-1] == ' ') // remove trailing spaces
2213                         key[strlen(key)-1] = 0;
2214                 if (!COM_ParseToken_Simple(&data, false, false, true))
2215                         return; // error
2216                 dpsnprintf(value, sizeof(value), "%s", com_token);
2217                 if (!strcmp("wad", key)) // for HalfLife maps
2218                 {
2219                         if (loadmodel->brush.ishlbsp)
2220                         {
2221                                 j = 0;
2222                                 for (i = 0;i < (int)sizeof(value);i++)
2223                                         if (value[i] != ';' && value[i] != '\\' && value[i] != '/' && value[i] != ':')
2224                                                 break;
2225                                 if (i < (int)sizeof(value) && value[i])
2226                                 {
2227                                         for (;i < (int)sizeof(value);i++)
2228                                         {
2229                                                 // ignore path - the \\ check is for HalfLife... stupid windoze 'programmers'...
2230                                                 if (value[i] == '\\' || value[i] == '/' || value[i] == ':')
2231                                                         j = i+1;
2232                                                 else if (value[i] == ';' || value[i] == 0)
2233                                                 {
2234                                                         k = value[i];
2235                                                         value[i] = 0;
2236                                                         W_LoadTextureWadFile(&value[j], false);
2237                                                         j = i+1;
2238                                                         if (!k)
2239                                                                 break;
2240                                                 }
2241                                         }
2242                                 }
2243                         }
2244                 }
2245         }
2246 }
2247
2248 static void Mod_Q1BSP_LoadEntities(sizebuf_t *sb)
2249 {
2250         loadmodel->brush.entities = NULL;
2251         if (!sb->cursize)
2252                 return;
2253         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
2254         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
2255         loadmodel->brush.entities[sb->cursize] = 0;
2256         if (loadmodel->brush.ishlbsp)
2257                 Mod_Q1BSP_ParseWadsFromEntityLump(loadmodel->brush.entities);
2258 }
2259
2260
2261 static void Mod_Q1BSP_LoadVertexes(sizebuf_t *sb)
2262 {
2263         mvertex_t       *out;
2264         int                     i, count;
2265         int                     structsize = 12;
2266
2267         if (sb->cursize % structsize)
2268                 Host_Error("Mod_Q1BSP_LoadVertexes: funny lump size in %s",loadmodel->name);
2269         count = sb->cursize / structsize;
2270         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2271
2272         loadmodel->brushq1.vertexes = out;
2273         loadmodel->brushq1.numvertexes = count;
2274
2275         for ( i=0 ; i<count ; i++, out++)
2276         {
2277                 out->position[0] = MSG_ReadLittleFloat(sb);
2278                 out->position[1] = MSG_ReadLittleFloat(sb);
2279                 out->position[2] = MSG_ReadLittleFloat(sb);
2280         }
2281 }
2282
2283 static void Mod_BSP_LoadSubmodels(sizebuf_t *sb, hullinfo_t *hullinfo)
2284 {
2285         mmodel_t        *out;
2286         int                     i, j, count;
2287         int                     structsize = hullinfo ? (48+4*hullinfo->filehulls) : 48;
2288
2289         if (sb->cursize % structsize)
2290                 Host_Error ("Mod_BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
2291
2292         count = sb->cursize / structsize;
2293         out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
2294
2295         loadmodel->brushq1.submodels = out;
2296         loadmodel->brush.numsubmodels = count;
2297
2298         for (i = 0; i < count; i++, out++)
2299         {
2300         // spread out the mins / maxs by a pixel
2301                 out->mins[0] = MSG_ReadLittleFloat(sb) - 1;
2302                 out->mins[1] = MSG_ReadLittleFloat(sb) - 1;
2303                 out->mins[2] = MSG_ReadLittleFloat(sb) - 1;
2304                 out->maxs[0] = MSG_ReadLittleFloat(sb) + 1;
2305                 out->maxs[1] = MSG_ReadLittleFloat(sb) + 1;
2306                 out->maxs[2] = MSG_ReadLittleFloat(sb) + 1;
2307                 out->origin[0] = MSG_ReadLittleFloat(sb);
2308                 out->origin[1] = MSG_ReadLittleFloat(sb);
2309                 out->origin[2] = MSG_ReadLittleFloat(sb);
2310                 if(hullinfo)
2311                 {
2312                         for (j = 0; j < hullinfo->filehulls; j++)
2313                                 out->headnode[j] = MSG_ReadLittleLong(sb);
2314                         out->visleafs  = MSG_ReadLittleLong(sb);
2315                 }
2316                 else // Quake 2 has only one hull
2317                         out->headnode[0] = MSG_ReadLittleLong(sb);
2318
2319                 out->firstface = MSG_ReadLittleLong(sb);
2320                 out->numfaces  = MSG_ReadLittleLong(sb);
2321         }
2322 }
2323
2324 static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
2325 {
2326         medge_t *out;
2327         int     i, count;
2328         int             structsize = loadmodel->brush.isbsp2 ? 8 : 4;
2329
2330         if (sb->cursize % structsize)
2331                 Host_Error("Mod_Q1BSP_LoadEdges: funny lump size in %s",loadmodel->name);
2332         count = sb->cursize / structsize;
2333         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2334
2335         loadmodel->brushq1.edges = out;
2336         loadmodel->brushq1.numedges = count;
2337
2338         for ( i=0 ; i<count ; i++, out++)
2339         {
2340                 if (loadmodel->brush.isbsp2)
2341                 {
2342                         out->v[0] = (unsigned int)MSG_ReadLittleLong(sb);
2343                         out->v[1] = (unsigned int)MSG_ReadLittleLong(sb);
2344                 }
2345                 else
2346                 {
2347                         out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
2348                         out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
2349                 }
2350                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
2351                 {
2352                         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);
2353                         if(!loadmodel->brushq1.numvertexes)
2354                                 Host_Error("Mod_Q1BSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
2355
2356                         out->v[0] = 0;
2357                         out->v[1] = 0;
2358                 }
2359         }
2360 }
2361
2362 static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
2363 {
2364         mtexinfo_t *out;
2365         int i, j, k, count, miptex;
2366         int structsize = 40;
2367
2368         if (sb->cursize % structsize)
2369                 Host_Error("Mod_Q1BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
2370         count = sb->cursize / structsize;
2371         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
2372
2373         loadmodel->brushq1.texinfo = out;
2374         loadmodel->brushq1.numtexinfo = count;
2375
2376         for (i = 0;i < count;i++, out++)
2377         {
2378                 for (k = 0;k < 2;k++)
2379                         for (j = 0;j < 4;j++)
2380                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
2381
2382                 miptex = MSG_ReadLittleLong(sb);
2383                 out->q1flags = MSG_ReadLittleLong(sb);
2384
2385                 if (out->q1flags & TEX_SPECIAL)
2386                 {
2387                         // if texture chosen is NULL or the shader needs a lightmap,
2388                         // force to notexture water shader
2389                         out->textureindex = loadmodel->num_textures - 1;
2390                 }
2391                 else
2392                 {
2393                         // if texture chosen is NULL, force to notexture
2394                         out->textureindex = loadmodel->num_textures - 2;
2395                 }
2396                 // see if the specified miptex is valid and try to use it instead
2397                 if (loadmodel->data_textures)
2398                 {
2399                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
2400                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
2401                         else
2402                                 out->textureindex = miptex;
2403                 }
2404         }
2405 }
2406
2407 #if 0
2408 void BoundPoly(int numverts, float *verts, vec3_t mins, vec3_t maxs)
2409 {
2410         int             i, j;
2411         float   *v;
2412
2413         mins[0] = mins[1] = mins[2] = 9999;
2414         maxs[0] = maxs[1] = maxs[2] = -9999;
2415         v = verts;
2416         for (i = 0;i < numverts;i++)
2417         {
2418                 for (j = 0;j < 3;j++, v++)
2419                 {
2420                         if (*v < mins[j])
2421                                 mins[j] = *v;
2422                         if (*v > maxs[j])
2423                                 maxs[j] = *v;
2424                 }
2425         }
2426 }
2427
2428 #define MAX_SUBDIVPOLYTRIANGLES 4096
2429 #define MAX_SUBDIVPOLYVERTS(MAX_SUBDIVPOLYTRIANGLES * 3)
2430
2431 static int subdivpolyverts, subdivpolytriangles;
2432 static int subdivpolyindex[MAX_SUBDIVPOLYTRIANGLES][3];
2433 static float subdivpolyvert[MAX_SUBDIVPOLYVERTS][3];
2434
2435 static int subdivpolylookupvert(vec3_t v)
2436 {
2437         int i;
2438         for (i = 0;i < subdivpolyverts;i++)
2439                 if (subdivpolyvert[i][0] == v[0]
2440                  && subdivpolyvert[i][1] == v[1]
2441                  && subdivpolyvert[i][2] == v[2])
2442                         return i;
2443         if (subdivpolyverts >= MAX_SUBDIVPOLYVERTS)
2444                 Host_Error("SubDividePolygon: ran out of vertices in buffer, please increase your r_subdivide_size");
2445         VectorCopy(v, subdivpolyvert[subdivpolyverts]);
2446         return subdivpolyverts++;
2447 }
2448
2449 static void SubdividePolygon(int numverts, float *verts)
2450 {
2451         int             i, i1, i2, i3, f, b, c, p;
2452         vec3_t  mins, maxs, front[256], back[256];
2453         float   m, *pv, *cv, dist[256], frac;
2454
2455         if (numverts > 250)
2456                 Host_Error("SubdividePolygon: ran out of verts in buffer");
2457
2458         BoundPoly(numverts, verts, mins, maxs);
2459
2460         for (i = 0;i < 3;i++)
2461         {
2462                 m = (mins[i] + maxs[i]) * 0.5;
2463                 m = r_subdivide_size.value * floor(m/r_subdivide_size.value + 0.5);
2464                 if (maxs[i] - m < 8)
2465                         continue;
2466                 if (m - mins[i] < 8)
2467                         continue;
2468
2469                 // cut it
2470                 for (cv = verts, c = 0;c < numverts;c++, cv += 3)
2471                         dist[c] = cv[i] - m;
2472
2473                 f = b = 0;
2474                 for (p = numverts - 1, c = 0, pv = verts + p * 3, cv = verts;c < numverts;p = c, c++, pv = cv, cv += 3)
2475                 {
2476                         if (dist[p] >= 0)
2477                         {
2478                                 VectorCopy(pv, front[f]);
2479                                 f++;
2480                         }
2481                         if (dist[p] <= 0)
2482                         {
2483                                 VectorCopy(pv, back[b]);
2484                                 b++;
2485                         }
2486                         if (dist[p] == 0 || dist[c] == 0)
2487                                 continue;
2488                         if ((dist[p] > 0) != (dist[c] > 0) )
2489                         {
2490                                 // clip point
2491                                 frac = dist[p] / (dist[p] - dist[c]);
2492                                 front[f][0] = back[b][0] = pv[0] + frac * (cv[0] - pv[0]);
2493                                 front[f][1] = back[b][1] = pv[1] + frac * (cv[1] - pv[1]);
2494                                 front[f][2] = back[b][2] = pv[2] + frac * (cv[2] - pv[2]);
2495                                 f++;
2496                                 b++;
2497                         }
2498                 }
2499
2500                 SubdividePolygon(f, front[0]);
2501                 SubdividePolygon(b, back[0]);
2502                 return;
2503         }
2504
2505         i1 = subdivpolylookupvert(verts);
2506         i2 = subdivpolylookupvert(verts + 3);
2507         for (i = 2;i < numverts;i++)
2508         {
2509                 if (subdivpolytriangles >= MAX_SUBDIVPOLYTRIANGLES)
2510                 {
2511                         Con_Print("SubdividePolygon: ran out of triangles in buffer, please increase your r_subdivide_size\n");
2512                         return;
2513                 }
2514
2515                 i3 = subdivpolylookupvert(verts + i * 3);
2516                 subdivpolyindex[subdivpolytriangles][0] = i1;
2517                 subdivpolyindex[subdivpolytriangles][1] = i2;
2518                 subdivpolyindex[subdivpolytriangles][2] = i3;
2519                 i2 = i3;
2520                 subdivpolytriangles++;
2521         }
2522 }
2523
2524 //Breaks a polygon up along axial 64 unit
2525 //boundaries so that turbulent and sky warps
2526 //can be done reasonably.
2527 static void Mod_Q1BSP_GenerateWarpMesh(msurface_t *surface)
2528 {
2529         int i, j;
2530         surfvertex_t *v;
2531         surfmesh_t *mesh;
2532
2533         subdivpolytriangles = 0;
2534         subdivpolyverts = 0;
2535         SubdividePolygon(surface->num_vertices, (surface->mesh->data_vertex3f + 3 * surface->num_firstvertex));
2536         if (subdivpolytriangles < 1)
2537                 Host_Error("Mod_Q1BSP_GenerateWarpMesh: no triangles?");
2538
2539         surface->mesh = mesh = Mem_Alloc(loadmodel->mempool, sizeof(surfmesh_t) + subdivpolytriangles * sizeof(int[3]) + subdivpolyverts * sizeof(surfvertex_t));
2540         mesh->num_vertices = subdivpolyverts;
2541         mesh->num_triangles = subdivpolytriangles;
2542         mesh->vertex = (surfvertex_t *)(mesh + 1);
2543         mesh->index = (int *)(mesh->vertex + mesh->num_vertices);
2544         memset(mesh->vertex, 0, mesh->num_vertices * sizeof(surfvertex_t));
2545
2546         for (i = 0;i < mesh->num_triangles;i++)
2547                 for (j = 0;j < 3;j++)
2548                         mesh->index[i*3+j] = subdivpolyindex[i][j];
2549
2550         for (i = 0, v = mesh->vertex;i < subdivpolyverts;i++, v++)
2551         {
2552                 VectorCopy(subdivpolyvert[i], v->v);
2553                 v->st[0] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[0]);
2554                 v->st[1] = DotProduct(v->v, surface->lightmapinfo->texinfo->vecs[1]);
2555         }
2556 }
2557 #endif
2558
2559 extern cvar_t gl_max_lightmapsize;
2560 static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
2561 {
2562         msurface_t *surface;
2563         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
2564         float texmins[2], texmaxs[2], val;
2565         rtexture_t *lightmaptexture, *deluxemaptexture;
2566         char vabuf[1024];
2567         int structsize = loadmodel->brush.isbsp2 ? 28 : 20;
2568
2569         if (sb->cursize % structsize)
2570                 Host_Error("Mod_Q1BSP_LoadFaces: funny lump size in %s",loadmodel->name);
2571         count = sb->cursize / structsize;
2572         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
2573         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
2574
2575         loadmodel->num_surfaces = count;
2576
2577         loadmodel->brushq1.firstrender = true;
2578         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
2579
2580         totalverts = 0;
2581         totaltris = 0;
2582         for (surfacenum = 0;surfacenum < count;surfacenum++)
2583         {
2584                 if (loadmodel->brush.isbsp2)
2585                         numedges = BuffLittleLong(sb->data + structsize * surfacenum + 12);
2586                 else
2587                         numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
2588                 totalverts += numedges;
2589                 totaltris += numedges - 2;
2590         }
2591
2592         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false);
2593
2594         lightmaptexture = NULL;
2595         deluxemaptexture = r_texture_blanknormalmap;
2596         lightmapnumber = 0;
2597         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
2598         totallightmapsamples = 0;
2599
2600         totalverts = 0;
2601         totaltris = 0;
2602         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2603         {
2604                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
2605                 // the struct on disk is the same in BSP29 (Q1), BSP30 (HL1), and IBSP38 (Q2)
2606                 planenum = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2607                 /*side = */loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2608                 firstedge = MSG_ReadLittleLong(sb);
2609                 numedges = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2610                 texinfoindex = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
2611                 for (i = 0;i < MAXLIGHTMAPS;i++)
2612                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
2613                 lightmapoffset = MSG_ReadLittleLong(sb);
2614
2615                 // FIXME: validate edges, texinfo, etc?
2616                 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)
2617                         Host_Error("Mod_Q1BSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
2618                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
2619                         Host_Error("Mod_Q1BSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
2620                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
2621                         Host_Error("Mod_Q1BSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
2622
2623                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
2624                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
2625
2626                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
2627                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
2628                         lightmapoffset = -1;
2629
2630                 //surface->flags = surface->texture->flags;
2631                 //if (LittleShort(in->side))
2632                 //      surface->flags |= SURF_PLANEBACK;
2633                 //surface->plane = loadmodel->brush.data_planes + planenum;
2634
2635                 surface->num_firstvertex = totalverts;
2636                 surface->num_vertices = numedges;
2637                 surface->num_firsttriangle = totaltris;
2638                 surface->num_triangles = numedges - 2;
2639                 totalverts += numedges;
2640                 totaltris += numedges - 2;
2641
2642                 // convert edges back to a normal polygon
2643                 for (i = 0;i < surface->num_vertices;i++)
2644                 {
2645                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
2646                         float s, t;
2647                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
2648                         if (lindex >= 0)
2649                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2650                         else
2651                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
2652                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2653                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2654                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
2655                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
2656                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
2657                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
2658                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
2659                 }
2660
2661                 for (i = 0;i < surface->num_triangles;i++)
2662                 {
2663                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
2664                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
2665                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
2666                 }
2667
2668                 // compile additional data about the surface geometry
2669                 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);
2670                 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);
2671                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
2672
2673                 // generate surface extents information
2674                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
2675                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
2676                 for (i = 1;i < surface->num_vertices;i++)
2677                 {
2678                         for (j = 0;j < 2;j++)
2679                         {
2680                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
2681                                 texmins[j] = min(texmins[j], val);
2682                                 texmaxs[j] = max(texmaxs[j], val);
2683                         }
2684                 }
2685                 for (i = 0;i < 2;i++)
2686                 {
2687                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
2688                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
2689                 }
2690
2691                 smax = surface->lightmapinfo->extents[0] >> 4;
2692                 tmax = surface->lightmapinfo->extents[1] >> 4;
2693                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2694                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2695
2696                 // lighting info
2697                 surface->lightmaptexture = NULL;
2698                 surface->deluxemaptexture = r_texture_blanknormalmap;
2699                 if (lightmapoffset == -1)
2700                 {
2701                         surface->lightmapinfo->samples = NULL;
2702 #if 1
2703                         // give non-lightmapped water a 1x white lightmap
2704                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
2705                         {
2706                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
2707                                 surface->lightmapinfo->styles[0] = 0;
2708                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
2709                         }
2710 #endif
2711                 }
2712                 else if (loadmodel->brush.ishlbsp || loadmodel->brush.isq2bsp) // LadyHavoc: HalfLife map (bsp version 30)
2713                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
2714                 else // LadyHavoc: white lighting (bsp version 29)
2715                 {
2716                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + (lightmapoffset * 3);
2717                         if (loadmodel->brushq1.nmaplightdata)
2718                                 surface->lightmapinfo->nmapsamples = loadmodel->brushq1.nmaplightdata + (lightmapoffset * 3);
2719                 }
2720
2721                 // check if we should apply a lightmap to this
2722                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
2723                 {
2724                         if (ssize > 256 || tsize > 256)
2725                                 Host_Error("Bad surface extents");
2726
2727                         if (lightmapsize < ssize)
2728                                 lightmapsize = ssize;
2729                         if (lightmapsize < tsize)
2730                                 lightmapsize = tsize;
2731
2732                         totallightmapsamples += ssize*tsize;
2733
2734                         // force lightmap upload on first time seeing the surface
2735                         //
2736                         // additionally this is used by the later code to see if a
2737                         // lightmap is needed on this surface (rather than duplicating the
2738                         // logic above)
2739                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
2740                         loadmodel->lit = true;
2741                 }
2742         }
2743
2744         // small maps (such as ammo boxes especially) don't need big lightmap
2745         // textures, so this code tries to guess a good size based on
2746         // totallightmapsamples (size of the lightmaps lump basically), as well as
2747         // trying to max out the size if there is a lot of lightmap data to store
2748         // additionally, never choose a lightmapsize that is smaller than the
2749         // largest surface encountered (as it would fail)
2750         i = lightmapsize;
2751         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
2752                 ;
2753
2754         // now that we've decided the lightmap texture size, we can do the rest
2755         if (cls.state != ca_dedicated)
2756         {
2757                 int stainmapsize = 0;
2758                 mod_alloclightmap_state_t allocState;
2759
2760                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
2761                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2762                 {
2763                         int iu, iv, lightmapx = 0, lightmapy = 0;
2764                         float u, v, ubase, vbase, uscale, vscale;
2765
2766                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2767                                 continue;
2768
2769                         smax = surface->lightmapinfo->extents[0] >> 4;
2770                         tmax = surface->lightmapinfo->extents[1] >> 4;
2771                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2772                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2773                         stainmapsize += ssize * tsize * 3;
2774
2775                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
2776                         {
2777                                 // allocate a texture pool if we need it
2778                                 if (loadmodel->texturepool == NULL)
2779                                         loadmodel->texturepool = R_AllocTexturePool();
2780                                 // could not find room, make a new lightmap
2781                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
2782                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
2783                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
2784                                 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);
2785                                 if (loadmodel->brushq1.nmaplightdata)
2786                                         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);
2787                                 lightmapnumber++;
2788                                 Mod_AllocLightmap_Reset(&allocState);
2789                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
2790                         }
2791                         surface->lightmaptexture = lightmaptexture;
2792                         surface->deluxemaptexture = deluxemaptexture;
2793                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
2794                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
2795
2796                         uscale = 1.0f / (float)lightmapsize;
2797                         vscale = 1.0f / (float)lightmapsize;
2798                         ubase = lightmapx * uscale;
2799                         vbase = lightmapy * vscale;
2800
2801                         for (i = 0;i < surface->num_vertices;i++)
2802                         {
2803                                 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);
2804                                 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);
2805                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
2806                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
2807                                 // LadyHavoc: calc lightmap data offset for vertex lighting to use
2808                                 iu = (int) u;
2809                                 iv = (int) v;
2810                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
2811                         }
2812                 }
2813
2814                 if (cl_stainmaps.integer)
2815                 {
2816                         // allocate stainmaps for permanent marks on walls and clear white
2817                         unsigned char *stainsamples = NULL;
2818                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
2819                         memset(stainsamples, 255, stainmapsize);
2820                         // assign pointers
2821                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
2822                         {
2823                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
2824                                         continue;
2825                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
2826                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
2827                                 surface->lightmapinfo->stainsamples = stainsamples;
2828                                 stainsamples += ssize * tsize * 3;
2829                         }
2830                 }
2831         }
2832
2833         // generate ushort elements array if possible
2834         if (loadmodel->surfmesh.data_element3s)
2835                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
2836                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
2837 }
2838
2839 static void Mod_BSP_LoadNodes_RecursiveSetParent(mnode_t *node, mnode_t *parent)
2840 {
2841         //if (node->parent)
2842         //      Host_Error("Mod_BSP_LoadNodes_RecursiveSetParent: runaway recursion");
2843         node->parent = parent;
2844         if (node->plane)
2845         {
2846                 // this is a node, recurse to children
2847                 Mod_BSP_LoadNodes_RecursiveSetParent(node->children[0], node);
2848                 Mod_BSP_LoadNodes_RecursiveSetParent(node->children[1], node);
2849                 // combine supercontents of children
2850                 node->combinedsupercontents = node->children[0]->combinedsupercontents | node->children[1]->combinedsupercontents;
2851         }
2852         else
2853         {
2854                 int j;
2855                 mleaf_t *leaf = (mleaf_t *)node;
2856                 // if this is a leaf, calculate supercontents mask from all collidable
2857                 // primitives in the leaf (brushes and collision surfaces)
2858                 // also flag if the leaf contains any collision surfaces
2859                 leaf->combinedsupercontents = 0;
2860                 // combine the supercontents values of all brushes in this leaf
2861                 for (j = 0;j < leaf->numleafbrushes;j++)
2862                         leaf->combinedsupercontents |= loadmodel->brush.data_brushes[leaf->firstleafbrush[j]].texture->supercontents;
2863                 // check if this leaf contains any collision surfaces (q3 patches)
2864                 for (j = 0;j < leaf->numleafsurfaces;j++)
2865                 {
2866                         msurface_t *surface = loadmodel->data_surfaces + leaf->firstleafsurface[j];
2867                         if (surface->num_collisiontriangles)
2868                         {
2869                                 leaf->containscollisionsurfaces = true;
2870                                 leaf->combinedsupercontents |= surface->texture->supercontents;
2871                         }
2872                 }
2873         }
2874 }
2875
2876 static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
2877 {
2878         int                     i, j, count, p, child[2];
2879         mnode_t         *out;
2880         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 24);
2881
2882         if (sb->cursize % structsize)
2883                 Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
2884         count = sb->cursize / structsize;
2885         if (count == 0)
2886                 Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
2887         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2888
2889         loadmodel->brush.data_nodes = out;
2890         loadmodel->brush.num_nodes = count;
2891
2892         for ( i=0 ; i<count ; i++, out++)
2893         {
2894                 p = MSG_ReadLittleLong(sb);
2895                 out->plane = loadmodel->brush.data_planes + p;
2896
2897                 if (loadmodel->brush.isbsp2rmqe)
2898                 {
2899                         child[0] = MSG_ReadLittleLong(sb);
2900                         child[1] = MSG_ReadLittleLong(sb);
2901                         out->mins[0] = MSG_ReadLittleShort(sb);
2902                         out->mins[1] = MSG_ReadLittleShort(sb);
2903                         out->mins[2] = MSG_ReadLittleShort(sb);
2904                         out->maxs[0] = MSG_ReadLittleShort(sb);
2905                         out->maxs[1] = MSG_ReadLittleShort(sb);
2906                         out->maxs[2] = MSG_ReadLittleShort(sb);
2907                         out->firstsurface = MSG_ReadLittleLong(sb);
2908                         out->numsurfaces = MSG_ReadLittleLong(sb);
2909                 }
2910                 else if (loadmodel->brush.isbsp2)
2911                 {
2912                         child[0] = MSG_ReadLittleLong(sb);
2913                         child[1] = MSG_ReadLittleLong(sb);
2914                         out->mins[0] = MSG_ReadLittleFloat(sb);
2915                         out->mins[1] = MSG_ReadLittleFloat(sb);
2916                         out->mins[2] = MSG_ReadLittleFloat(sb);
2917                         out->maxs[0] = MSG_ReadLittleFloat(sb);
2918                         out->maxs[1] = MSG_ReadLittleFloat(sb);
2919                         out->maxs[2] = MSG_ReadLittleFloat(sb);
2920                         out->firstsurface = MSG_ReadLittleLong(sb);
2921                         out->numsurfaces = MSG_ReadLittleLong(sb);
2922                 }
2923                 else
2924                 {
2925                         child[0] = (unsigned short)MSG_ReadLittleShort(sb);
2926                         child[1] = (unsigned short)MSG_ReadLittleShort(sb);
2927                         if (child[0] >= count)
2928                                 child[0] -= 65536;
2929                         if (child[1] >= count)
2930                                 child[1] -= 65536;
2931
2932                         out->mins[0] = MSG_ReadLittleShort(sb);
2933                         out->mins[1] = MSG_ReadLittleShort(sb);
2934                         out->mins[2] = MSG_ReadLittleShort(sb);
2935                         out->maxs[0] = MSG_ReadLittleShort(sb);
2936                         out->maxs[1] = MSG_ReadLittleShort(sb);
2937                         out->maxs[2] = MSG_ReadLittleShort(sb);
2938
2939                         out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
2940                         out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
2941                 }
2942
2943                 for (j=0 ; j<2 ; j++)
2944                 {
2945                         // LadyHavoc: this code supports broken bsp files produced by
2946                         // arguire qbsp which can produce more than 32768 nodes, any value
2947                         // below count is assumed to be a node number, any other value is
2948                         // assumed to be a leaf number
2949                         p = child[j];
2950                         if (p >= 0)
2951                         {
2952                                 if (p < loadmodel->brush.num_nodes)
2953                                         out->children[j] = loadmodel->brush.data_nodes + p;
2954                                 else
2955                                 {
2956                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
2957                                         // map it to the solid leaf
2958                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2959                                 }
2960                         }
2961                         else
2962                         {
2963                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
2964                                 p = -(p+1);
2965                                 if (p < loadmodel->brush.num_leafs)
2966                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
2967                                 else
2968                                 {
2969                                         Con_Printf("Mod_Q1BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
2970                                         // map it to the solid leaf
2971                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
2972                                 }
2973                         }
2974                 }
2975         }
2976
2977         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);        // sets nodes and leafs
2978 }
2979
2980 static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
2981 {
2982         mleaf_t *out;
2983         int i, j, count, p, firstmarksurface, nummarksurfaces;
2984         int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 28);
2985
2986         if (sb->cursize % structsize)
2987                 Host_Error("Mod_Q1BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
2988         count = sb->cursize / structsize;
2989         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
2990
2991         loadmodel->brush.data_leafs = out;
2992         loadmodel->brush.num_leafs = count;
2993         // get visleafs from the submodel data
2994         loadmodel->brush.num_pvsclusters = loadmodel->brushq1.submodels[0].visleafs;
2995         loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters+7)>>3;
2996         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
2997         memset(loadmodel->brush.data_pvsclusters, 0xFF, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
2998
2999         // FIXME: this function could really benefit from some error checking
3000         for ( i=0 ; i<count ; i++, out++)
3001         {
3002                 out->contents = MSG_ReadLittleLong(sb);
3003
3004                 out->clusterindex = i - 1;
3005                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
3006                         out->clusterindex = -1;
3007
3008                 p = MSG_ReadLittleLong(sb);
3009                 // ignore visofs errors on leaf 0 (solid)
3010                 if (p >= 0 && out->clusterindex >= 0)
3011                 {
3012                         if (p >= loadmodel->brushq1.num_compressedpvs)
3013                                 Con_Print("Mod_Q1BSP_LoadLeafs: invalid visofs\n");
3014                         else
3015                                 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);
3016                 }
3017
3018                 if (loadmodel->brush.isbsp2rmqe)
3019                 {
3020                         out->mins[0] = MSG_ReadLittleShort(sb);
3021                         out->mins[1] = MSG_ReadLittleShort(sb);
3022                         out->mins[2] = MSG_ReadLittleShort(sb);
3023                         out->maxs[0] = MSG_ReadLittleShort(sb);
3024                         out->maxs[1] = MSG_ReadLittleShort(sb);
3025                         out->maxs[2] = MSG_ReadLittleShort(sb);
3026
3027                         firstmarksurface = MSG_ReadLittleLong(sb);
3028                         nummarksurfaces = MSG_ReadLittleLong(sb);
3029                 }
3030                 else if (loadmodel->brush.isbsp2)
3031                 {
3032                         out->mins[0] = MSG_ReadLittleFloat(sb);
3033                         out->mins[1] = MSG_ReadLittleFloat(sb);
3034                         out->mins[2] = MSG_ReadLittleFloat(sb);
3035                         out->maxs[0] = MSG_ReadLittleFloat(sb);
3036                         out->maxs[1] = MSG_ReadLittleFloat(sb);
3037                         out->maxs[2] = MSG_ReadLittleFloat(sb);
3038
3039                         firstmarksurface = MSG_ReadLittleLong(sb);
3040                         nummarksurfaces = MSG_ReadLittleLong(sb);
3041                 }
3042                 else
3043                 {
3044                         out->mins[0] = MSG_ReadLittleShort(sb);
3045                         out->mins[1] = MSG_ReadLittleShort(sb);
3046                         out->mins[2] = MSG_ReadLittleShort(sb);
3047                         out->maxs[0] = MSG_ReadLittleShort(sb);
3048                         out->maxs[1] = MSG_ReadLittleShort(sb);
3049                         out->maxs[2] = MSG_ReadLittleShort(sb);
3050
3051                         firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
3052                         nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
3053                 }
3054
3055                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
3056                 {
3057                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
3058                         out->numleafsurfaces = nummarksurfaces;
3059                 }
3060                 else
3061                 {
3062                         Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
3063                         out->firstleafsurface = NULL;
3064                         out->numleafsurfaces = 0;
3065                 }
3066
3067                 for (j = 0;j < 4;j++)
3068                         out->ambient_sound_level[j] = MSG_ReadByte(sb);
3069         }
3070 }
3071
3072 static qbool Mod_Q1BSP_CheckWaterAlphaSupport(void)
3073 {
3074         int i, j;
3075         mleaf_t *leaf;
3076         const unsigned char *pvs;
3077         // if there's no vis data, assume supported (because everything is visible all the time)
3078         if (!loadmodel->brush.data_pvsclusters)
3079                 return true;
3080         // check all liquid leafs to see if they can see into empty leafs, if any
3081         // can we can assume this map supports r_wateralpha
3082         for (i = 0, leaf = loadmodel->brush.data_leafs;i < loadmodel->brush.num_leafs;i++, leaf++)
3083         {
3084                 if ((leaf->contents == CONTENTS_WATER || leaf->contents == CONTENTS_SLIME) && leaf->clusterindex >= 0)
3085                 {
3086                         pvs = loadmodel->brush.data_pvsclusters + leaf->clusterindex * loadmodel->brush.num_pvsclusterbytes;
3087                         for (j = 0;j < loadmodel->brush.num_leafs;j++)
3088                                 if (CHECKPVSBIT(pvs, loadmodel->brush.data_leafs[j].clusterindex) && loadmodel->brush.data_leafs[j].contents == CONTENTS_EMPTY)
3089                                         return true;
3090                 }
3091         }
3092         return false;
3093 }
3094
3095 static void Mod_Q1BSP_LoadClipnodes(sizebuf_t *sb, hullinfo_t *hullinfo)
3096 {
3097         mclipnode_t *out;
3098         int                     i, count;
3099         hull_t          *hull;
3100         int structsize = loadmodel->brush.isbsp2 ? 12 : 8;
3101
3102         if (sb->cursize % structsize)
3103                 Host_Error("Mod_Q1BSP_LoadClipnodes: funny lump size in %s",loadmodel->name);
3104         count = sb->cursize / structsize;
3105         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
3106
3107         loadmodel->brushq1.clipnodes = out;
3108         loadmodel->brushq1.numclipnodes = count;
3109
3110         for (i = 1; i < MAX_MAP_HULLS; i++)
3111         {
3112                 hull = &loadmodel->brushq1.hulls[i];
3113                 hull->clipnodes = out;
3114                 hull->firstclipnode = 0;
3115                 hull->lastclipnode = count-1;
3116                 hull->planes = loadmodel->brush.data_planes;
3117                 hull->clip_mins[0] = hullinfo->hullsizes[i][0][0];
3118                 hull->clip_mins[1] = hullinfo->hullsizes[i][0][1];
3119                 hull->clip_mins[2] = hullinfo->hullsizes[i][0][2];
3120                 hull->clip_maxs[0] = hullinfo->hullsizes[i][1][0];
3121                 hull->clip_maxs[1] = hullinfo->hullsizes[i][1][1];
3122                 hull->clip_maxs[2] = hullinfo->hullsizes[i][1][2];
3123                 VectorSubtract(hull->clip_maxs, hull->clip_mins, hull->clip_size);
3124         }
3125
3126         for (i=0 ; i<count ; i++, out++)
3127         {
3128                 out->planenum = MSG_ReadLittleLong(sb);
3129                 if (out->planenum < 0 || out->planenum >= loadmodel->brush.num_planes)
3130                         Host_Error("%s: Corrupt clipping hull(out of range planenum)", loadmodel->name);
3131                 if (loadmodel->brush.isbsp2)
3132                 {
3133                         out->children[0] = MSG_ReadLittleLong(sb);
3134                         out->children[1] = MSG_ReadLittleLong(sb);
3135                         if (out->children[0] >= count)
3136                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3137                         if (out->children[1] >= count)
3138                                 Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
3139                 }
3140                 else
3141                 {
3142                         // LadyHavoc: this code supports arguire qbsp's broken clipnodes indices (more than 32768 clipnodes), values above count are assumed to be contents values
3143                         out->children[0] = (unsigned short)MSG_ReadLittleShort(sb);
3144                         out->children[1] = (unsigned short)MSG_ReadLittleShort(sb);
3145                         if (out->children[0] >= count)
3146                                 out->children[0] -= 65536;
3147                         if (out->children[1] >= count)
3148                                 out->children[1] -= 65536;
3149                 }
3150         }
3151 }
3152
3153 //Duplicate the drawing hull structure as a clipping hull
3154 static void Mod_Q1BSP_MakeHull0(void)
3155 {
3156         mnode_t         *in;
3157         mclipnode_t *out;
3158         int                     i;
3159         hull_t          *hull;
3160
3161         hull = &loadmodel->brushq1.hulls[0];
3162
3163         in = loadmodel->brush.data_nodes;
3164         out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(*out));
3165
3166         hull->clipnodes = out;
3167         hull->firstclipnode = 0;
3168         hull->lastclipnode = loadmodel->brush.num_nodes - 1;
3169         hull->planes = loadmodel->brush.data_planes;
3170
3171         for (i = 0;i < loadmodel->brush.num_nodes;i++, out++, in++)
3172         {
3173                 out->planenum = in->plane - loadmodel->brush.data_planes;
3174                 out->children[0] = in->children[0]->plane ? in->children[0] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[0])->contents;
3175                 out->children[1] = in->children[1]->plane ? in->children[1] - loadmodel->brush.data_nodes : ((mleaf_t *)in->children[1])->contents;
3176         }
3177 }
3178
3179 static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
3180 {
3181         int i, j;
3182         int structsize = loadmodel->brush.isbsp2 ? 4 : 2;
3183
3184         if (sb->cursize % structsize)
3185                 Host_Error("Mod_Q1BSP_LoadLeaffaces: funny lump size in %s",loadmodel->name);
3186         loadmodel->brush.num_leafsurfaces = sb->cursize / structsize;
3187         loadmodel->brush.data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafsurfaces * sizeof(int));
3188
3189         if (loadmodel->brush.isbsp2)
3190         {
3191                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3192                 {
3193                         j = MSG_ReadLittleLong(sb);
3194                         if (j < 0 || j >= loadmodel->num_surfaces)
3195                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3196                         loadmodel->brush.data_leafsurfaces[i] = j;
3197                 }
3198         }
3199         else
3200         {
3201                 for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
3202                 {
3203                         j = (unsigned short) MSG_ReadLittleShort(sb);
3204                         if (j >= loadmodel->num_surfaces)
3205                                 Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
3206                         loadmodel->brush.data_leafsurfaces[i] = j;
3207                 }
3208         }
3209 }
3210
3211 static void Mod_Q1BSP_LoadSurfedges(sizebuf_t *sb)
3212 {
3213         int             i;
3214         int structsize = 4;
3215
3216         if (sb->cursize % structsize)
3217                 Host_Error("Mod_Q1BSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
3218         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
3219         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
3220
3221         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
3222                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
3223 }
3224
3225
3226 static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
3227 {
3228         int                     i;
3229         mplane_t        *out;
3230         int structsize = 20;
3231
3232         if (sb->cursize % structsize)
3233                 Host_Error("Mod_Q1BSP_LoadPlanes: funny lump size in %s", loadmodel->name);
3234         loadmodel->brush.num_planes = sb->cursize / structsize;
3235         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
3236
3237         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
3238         {
3239                 out->normal[0] = MSG_ReadLittleFloat(sb);
3240                 out->normal[1] = MSG_ReadLittleFloat(sb);
3241                 out->normal[2] = MSG_ReadLittleFloat(sb);
3242                 out->dist = MSG_ReadLittleFloat(sb);
3243                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
3244                 PlaneClassify(out);
3245         }
3246 }
3247
3248 // fixes up sky surfaces that have SKY contents behind them, so that they do not cast shadows (e1m5 logo shadow trick).
3249 static void Mod_Q1BSP_AssignNoShadowSkySurfaces(model_t *mod)
3250 {
3251         int surfaceindex;
3252         msurface_t *surface;
3253         vec3_t center;
3254         int contents;
3255         for (surfaceindex = mod->submodelsurfaces_start; surfaceindex < mod->submodelsurfaces_end;surfaceindex++)
3256         {
3257                 surface = mod->data_surfaces + surfaceindex;
3258                 if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
3259                 {
3260                         // check if the point behind the surface polygon is SOLID or SKY contents
3261                         VectorMAMAM(0.5f, surface->mins, 0.5f, surface->maxs, -0.25f, mod->surfmesh.data_normal3f + 3*surface->num_firstvertex, center);
3262                         contents = Mod_Q1BSP_PointSuperContents(mod, 0, center);
3263                         if (!(contents & SUPERCONTENTS_SOLID))
3264                                 surface->texture = surface->texture->skynoshadowtexture;
3265                 }
3266         }
3267 }
3268
3269 static void Mod_Q1BSP_LoadMapBrushes(void)
3270 {
3271 #if 0
3272 // unfinished
3273         int submodel, numbrushes;
3274         qbool firstbrush;
3275         char *text, *maptext;
3276         char mapfilename[MAX_QPATH];
3277         FS_StripExtension (loadmodel->name, mapfilename, sizeof (mapfilename));
3278         strlcat (mapfilename, ".map", sizeof (mapfilename));
3279         maptext = (unsigned char*) FS_LoadFile(mapfilename, tempmempool, false, NULL);
3280         if (!maptext)
3281                 return;
3282         text = maptext;
3283         if (!COM_ParseToken_Simple(&data, false, false, true))
3284                 return; // error
3285         submodel = 0;
3286         for (;;)
3287         {
3288                 if (!COM_ParseToken_Simple(&data, false, false, true))
3289                         break;
3290                 if (com_token[0] != '{')
3291                         return; // error
3292                 // entity
3293                 firstbrush = true;
3294                 numbrushes = 0;
3295                 maxbrushes = 256;
3296                 brushes = Mem_Alloc(loadmodel->mempool, maxbrushes * sizeof(mbrush_t));
3297                 for (;;)
3298                 {
3299                         if (!COM_ParseToken_Simple(&data, false, false, true))
3300                                 return; // error
3301                         if (com_token[0] == '}')
3302                                 break; // end of entity
3303                         if (com_token[0] == '{')
3304                         {
3305                                 // brush
3306                                 if (firstbrush)
3307                                 {
3308                                         if (submodel)
3309                                         {
3310                                                 if (submodel > loadmodel->brush.numsubmodels)
3311                                                 {
3312                                                         Con_Printf("Mod_Q1BSP_LoadMapBrushes: .map has more submodels than .bsp!\n");
3313                                                         model = NULL;
3314                                                 }
3315                                                 else
3316                                                         model = loadmodel->brush.submodels[submodel];
3317                                         }
3318                                         else
3319                                                 model = loadmodel;
3320                                 }
3321                                 for (;;)
3322                                 {
3323                                         if (!COM_ParseToken_Simple(&data, false, false, true))
3324                                                 return; // error
3325                                         if (com_token[0] == '}')
3326                                                 break; // end of brush
3327                                         // each brush face should be this format:
3328                                         // ( x y z ) ( x y z ) ( x y z ) texture scroll_s scroll_t rotateangle scale_s scale_t
3329                                         // FIXME: support hl .map format
3330                                         for (pointnum = 0;pointnum < 3;pointnum++)
3331                                         {
3332                                                 COM_ParseToken_Simple(&data, false, false, true);
3333                                                 for (componentnum = 0;componentnum < 3;componentnum++)
3334                                                 {
3335                                                         COM_ParseToken_Simple(&data, false, false, true);
3336                                                         point[pointnum][componentnum] = atof(com_token);
3337                                                 }
3338                                                 COM_ParseToken_Simple(&data, false, false, true);
3339                                         }
3340                                         COM_ParseToken_Simple(&data, false, false, true);
3341                                         strlcpy(facetexture, com_token, sizeof(facetexture));
3342                                         COM_ParseToken_Simple(&data, false, false, true);
3343                                         //scroll_s = atof(com_token);
3344                                         COM_ParseToken_Simple(&data, false, false, true);
3345                                         //scroll_t = atof(com_token);
3346                                         COM_ParseToken_Simple(&data, false, false, true);
3347                                         //rotate = atof(com_token);
3348                                         COM_ParseToken_Simple(&data, false, false, true);
3349                                         //scale_s = atof(com_token);
3350                                         COM_ParseToken_Simple(&data, false, false, true);
3351                                         //scale_t = atof(com_token);
3352                                         TriangleNormal(point[0], point[1], point[2], planenormal);
3353                                         VectorNormalizeDouble(planenormal);
3354                                         planedist = DotProduct(point[0], planenormal);
3355                                         //ChooseTexturePlane(planenormal, texturevector[0], texturevector[1]);
3356                                 }
3357                                 continue;
3358                         }
3359                 }
3360         }
3361 #endif
3362 }
3363
3364
3365 #define MAX_PORTALPOINTS 64
3366
3367 typedef struct portal_s
3368 {
3369         mplane_t plane;
3370         mnode_t *nodes[2];              // [0] = front side of plane
3371         struct portal_s *next[2];
3372         int numpoints;
3373         double points[3*MAX_PORTALPOINTS];
3374         struct portal_s *chain; // all portals are linked into a list
3375 }
3376 portal_t;
3377
3378 static memexpandablearray_t portalarray;
3379
3380 static void Mod_BSP_RecursiveRecalcNodeBBox(mnode_t *node)
3381 {
3382         // process only nodes (leafs already had their box calculated)
3383         if (!node->plane)
3384                 return;
3385
3386         // calculate children first
3387         Mod_BSP_RecursiveRecalcNodeBBox(node->children[0]);
3388         Mod_BSP_RecursiveRecalcNodeBBox(node->children[1]);
3389
3390         // make combined bounding box from children
3391         node->mins[0] = min(node->children[0]->mins[0], node->children[1]->mins[0]);
3392         node->mins[1] = min(node->children[0]->mins[1], node->children[1]->mins[1]);
3393         node->mins[2] = min(node->children[0]->mins[2], node->children[1]->mins[2]);
3394         node->maxs[0] = max(node->children[0]->maxs[0], node->children[1]->maxs[0]);
3395         node->maxs[1] = max(node->children[0]->maxs[1], node->children[1]->maxs[1]);
3396         node->maxs[2] = max(node->children[0]->maxs[2], node->children[1]->maxs[2]);
3397 }
3398
3399 static void Mod_BSP_FinalizePortals(void)
3400 {
3401         int i, j, numportals, numpoints, portalindex, portalrange = (int)Mem_ExpandableArray_IndexRange(&portalarray);
3402         portal_t *p;
3403         mportal_t *portal;
3404         mvertex_t *point;
3405         mleaf_t *leaf, *endleaf;
3406
3407         // tally up portal and point counts and recalculate bounding boxes for all
3408         // leafs (because qbsp is very sloppy)
3409         leaf = loadmodel->brush.data_leafs;
3410         endleaf = leaf + loadmodel->brush.num_leafs;
3411         if (mod_recalculatenodeboxes.integer)
3412         {
3413                 for (;leaf < endleaf;leaf++)
3414                 {
3415                         VectorSet(leaf->mins,  2000000000,  2000000000,  2000000000);
3416                         VectorSet(leaf->maxs, -2000000000, -2000000000, -2000000000);
3417                 }
3418         }
3419         numportals = 0;
3420         numpoints = 0;
3421         for (portalindex = 0;portalindex < portalrange;portalindex++)
3422         {
3423                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3424                 if (!p)
3425                         continue;
3426                 // note: this check must match the one below or it will usually corrupt memory
3427                 // 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
3428                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1] && ((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3429                 {
3430                         numportals += 2;
3431                         numpoints += p->numpoints * 2;
3432                 }
3433         }
3434         loadmodel->brush.data_portals = (mportal_t *)Mem_Alloc(loadmodel->mempool, numportals * sizeof(mportal_t) + numpoints * sizeof(mvertex_t));
3435         loadmodel->brush.num_portals = numportals;
3436         loadmodel->brush.data_portalpoints = (mvertex_t *)((unsigned char *) loadmodel->brush.data_portals + numportals * sizeof(mportal_t));
3437         loadmodel->brush.num_portalpoints = numpoints;
3438         // clear all leaf portal chains
3439         for (i = 0;i < loadmodel->brush.num_leafs;i++)
3440                 loadmodel->brush.data_leafs[i].portals = NULL;
3441         // process all portals in the global portal chain, while freeing them
3442         portal = loadmodel->brush.data_portals;
3443         point = loadmodel->brush.data_portalpoints;
3444         for (portalindex = 0;portalindex < portalrange;portalindex++)
3445         {
3446                 p = (portal_t*)Mem_ExpandableArray_RecordAtIndex(&portalarray, portalindex);
3447                 if (!p)
3448                         continue;
3449                 if (p->numpoints >= 3 && p->nodes[0] != p->nodes[1])
3450                 {
3451                         // note: this check must match the one above or it will usually corrupt memory
3452                         // 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
3453                         if (((mleaf_t *)p->nodes[0])->clusterindex >= 0 && ((mleaf_t *)p->nodes[1])->clusterindex >= 0)
3454                         {
3455                                 // first make the back to front portal(forward portal)
3456                                 portal->points = point;
3457                                 portal->numpoints = p->numpoints;
3458                                 portal->plane.dist = p->plane.dist;
3459                                 VectorCopy(p->plane.normal, portal->plane.normal);
3460                                 portal->here = (mleaf_t *)p->nodes[1];
3461                                 portal->past = (mleaf_t *)p->nodes[0];
3462                                 // copy points
3463                                 for (j = 0;j < portal->numpoints;j++)
3464                                 {
3465                                         VectorCopy(p->points + j*3, point->position);
3466                                         point++;
3467                                 }
3468                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3469                                 PlaneClassify(&portal->plane);
3470
3471                                 // link into leaf's portal chain
3472                                 portal->next = portal->here->portals;
3473                                 portal->here->portals = portal;
3474
3475                                 // advance to next portal
3476                                 portal++;
3477
3478                                 // then make the front to back portal(backward portal)
3479                                 portal->points = point;
3480                                 portal->numpoints = p->numpoints;
3481                                 portal->plane.dist = -p->plane.dist;
3482                                 VectorNegate(p->plane.normal, portal->plane.normal);
3483                                 portal->here = (mleaf_t *)p->nodes[0];
3484                                 portal->past = (mleaf_t *)p->nodes[1];
3485                                 // copy points
3486                                 for (j = portal->numpoints - 1;j >= 0;j--)
3487                                 {
3488                                         VectorCopy(p->points + j*3, point->position);
3489                                         point++;
3490                                 }
3491                                 BoxFromPoints(portal->mins, portal->maxs, portal->numpoints, portal->points->position);
3492                                 PlaneClassify(&portal->plane);
3493
3494                                 // link into leaf's portal chain
3495                                 portal->next = portal->here->portals;
3496                                 portal->here->portals = portal;
3497
3498                                 // advance to next portal
3499                                 portal++;
3500                         }
3501                         // add the portal's polygon points to the leaf bounding boxes
3502                         if (mod_recalculatenodeboxes.integer)
3503                         {
3504                                 for (i = 0;i < 2;i++)
3505                                 {
3506                                         leaf = (mleaf_t *)p->nodes[i];
3507                                         for (j = 0;j < p->numpoints;j++)
3508                                         {
3509                                                 if (leaf->mins[0] > p->points[j*3+0]) leaf->mins[0] = p->points[j*3+0];
3510                                                 if (leaf->mins[1] > p->points[j*3+1]) leaf->mins[1] = p->points[j*3+1];
3511                                                 if (leaf->mins[2] > p->points[j*3+2]) leaf->mins[2] = p->points[j*3+2];
3512                                                 if (leaf->maxs[0] < p->points[j*3+0]) leaf->maxs[0] = p->points[j*3+0];
3513                                                 if (leaf->maxs[1] < p->points[j*3+1]) leaf->maxs[1] = p->points[j*3+1];
3514                                                 if (leaf->maxs[2] < p->points[j*3+2]) leaf->maxs[2] = p->points[j*3+2];
3515                                         }
3516                                 }
3517                         }
3518                 }
3519         }
3520         // now recalculate the node bounding boxes from the leafs
3521         if (mod_recalculatenodeboxes.integer)
3522                 Mod_BSP_RecursiveRecalcNodeBBox(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3523 }
3524
3525 /*
3526 =============
3527 AddPortalToNodes
3528 =============
3529 */
3530 static void AddPortalToNodes(portal_t *p, mnode_t *front, mnode_t *back)
3531 {
3532         if (!front)
3533                 Host_Error("AddPortalToNodes: NULL front node");
3534         if (!back)
3535                 Host_Error("AddPortalToNodes: NULL back node");
3536         if (p->nodes[0] || p->nodes[1])
3537                 Host_Error("AddPortalToNodes: already included");
3538         // 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
3539
3540         p->nodes[0] = front;
3541         p->next[0] = (portal_t *)front->portals;
3542         front->portals = (mportal_t *)p;
3543
3544         p->nodes[1] = back;
3545         p->next[1] = (portal_t *)back->portals;
3546         back->portals = (mportal_t *)p;
3547 }
3548
3549 /*
3550 =============
3551 RemovePortalFromNode
3552 =============
3553 */
3554 static void RemovePortalFromNodes(portal_t *portal)
3555 {
3556         int i;
3557         mnode_t *node;
3558         void **portalpointer;
3559         portal_t *t;
3560         for (i = 0;i < 2;i++)
3561         {
3562                 node = portal->nodes[i];
3563
3564                 portalpointer = (void **) &node->portals;
3565                 while (1)
3566                 {
3567                         t = (portal_t *)*portalpointer;
3568                         if (!t)
3569                                 Host_Error("RemovePortalFromNodes: portal not in leaf");
3570
3571                         if (t == portal)
3572                         {
3573                                 if (portal->nodes[0] == node)
3574                                 {
3575                                         *portalpointer = portal->next[0];
3576                                         portal->nodes[0] = NULL;
3577                                 }
3578                                 else if (portal->nodes[1] == node)
3579                                 {
3580                                         *portalpointer = portal->next[1];
3581                                         portal->nodes[1] = NULL;
3582                                 }
3583                                 else
3584                                         Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3585                                 break;
3586                         }
3587
3588                         if (t->nodes[0] == node)
3589                                 portalpointer = (void **) &t->next[0];
3590                         else if (t->nodes[1] == node)
3591                                 portalpointer = (void **) &t->next[1];
3592                         else
3593                                 Host_Error("RemovePortalFromNodes: portal not bounding leaf");
3594                 }
3595         }
3596 }
3597
3598 #define PORTAL_DIST_EPSILON (1.0 / 32.0)
3599 static double *portalpointsbuffer;
3600 static int portalpointsbufferoffset;
3601 static int portalpointsbuffersize;
3602 static void Mod_BSP_RecursiveNodePortals(mnode_t *node)
3603 {
3604         int i, side;
3605         mnode_t *front, *back, *other_node;
3606         mplane_t clipplane, *plane;
3607         portal_t *portal, *nextportal, *nodeportal, *splitportal, *temp;
3608         int numfrontpoints, numbackpoints;
3609         double *frontpoints, *backpoints;
3610
3611         // if a leaf, we're done
3612         if (!node->plane)
3613                 return;
3614
3615         // get some space for our clipping operations to use
3616         if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
3617         {
3618                 portalpointsbuffersize = portalpointsbufferoffset * 2;
3619                 portalpointsbuffer = (double *)Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3620         }
3621         frontpoints = portalpointsbuffer + portalpointsbufferoffset;
3622         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3623         backpoints = portalpointsbuffer + portalpointsbufferoffset;
3624         portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
3625
3626         plane = node->plane;
3627
3628         front = node->children[0];
3629         back = node->children[1];
3630         if (front == back)
3631                 Host_Error("Mod_BSP_RecursiveNodePortals: corrupt node hierarchy");
3632
3633         // create the new portal by generating a polygon for the node plane,
3634         // and clipping it by all of the other portals(which came from nodes above this one)
3635         nodeportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3636         nodeportal->plane = *plane;
3637
3638         // 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)
3639         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);
3640         nodeportal->numpoints = 4;
3641
3642         for (portal = (portal_t *)node->portals;portal;portal = portal->next[side])
3643         {
3644                 clipplane = portal->plane;
3645                 if (portal->nodes[0] == portal->nodes[1])
3646                         Host_Error("Mod_BSP_RecursiveNodePortals: portal has same node on both sides(1)");
3647                 if (portal->nodes[0] == node)
3648                         side = 0;
3649                 else if (portal->nodes[1] == node)
3650                 {
3651                         clipplane.dist = -clipplane.dist;
3652                         VectorNegate(clipplane.normal, clipplane.normal);
3653                         side = 1;
3654                 }
3655                 else
3656                 {
3657                         Host_Error("Mod_BSP_RecursiveNodePortals: mislinked portal");
3658                         side = 0; // hush warning
3659                 }
3660
3661                 for (i = 0;i < nodeportal->numpoints*3;i++)
3662                         frontpoints[i] = nodeportal->points[i];
3663                 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);
3664                 if (nodeportal->numpoints <= 0 || nodeportal->numpoints >= MAX_PORTALPOINTS)
3665                         break;
3666         }
3667
3668         if (nodeportal->numpoints < 3)
3669         {
3670                 Con_Print(CON_WARN "Mod_BSP_RecursiveNodePortals: WARNING: new portal was clipped away\n");
3671                 nodeportal->numpoints = 0;
3672         }
3673         else if (nodeportal->numpoints >= MAX_PORTALPOINTS)
3674         {
3675                 Con_Print(CON_WARN "Mod_BSP_RecursiveNodePortals: WARNING: new portal has too many points\n");
3676                 nodeportal->numpoints = 0;
3677         }
3678
3679         AddPortalToNodes(nodeportal, front, back);
3680
3681         // split the portals of this node along this node's plane and assign them to the children of this node
3682         // (migrating the portals downward through the tree)
3683         for (portal = (portal_t *)node->portals;portal;portal = nextportal)
3684         {
3685                 if (portal->nodes[0] == portal->nodes[1])
3686                         Host_Error("Mod_BSP_RecursiveNodePortals: portal has same node on both sides(2)");
3687                 if (portal->nodes[0] == node)
3688                         side = 0;
3689                 else if (portal->nodes[1] == node)
3690                         side = 1;
3691                 else
3692                 {
3693                         Host_Error("Mod_BSP_RecursiveNodePortals: mislinked portal");
3694                         side = 0; // hush warning
3695                 }
3696                 nextportal = portal->next[side];
3697                 if (!portal->numpoints)
3698                         continue;
3699
3700                 other_node = portal->nodes[!side];
3701                 RemovePortalFromNodes(portal);
3702
3703                 // cut the portal into two portals, one on each side of the node plane
3704                 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);
3705
3706                 if (!numfrontpoints)
3707                 {
3708                         if (side == 0)
3709                                 AddPortalToNodes(portal, back, other_node);
3710                         else
3711                                 AddPortalToNodes(portal, other_node, back);
3712                         continue;
3713                 }
3714                 if (!numbackpoints)
3715                 {
3716                         if (side == 0)
3717                                 AddPortalToNodes(portal, front, other_node);
3718                         else
3719                                 AddPortalToNodes(portal, other_node, front);
3720                         continue;
3721                 }
3722
3723                 // the portal is split
3724                 splitportal = (portal_t *)Mem_ExpandableArray_AllocRecord(&portalarray);
3725                 temp = splitportal->chain;
3726                 *splitportal = *portal;
3727                 splitportal->chain = temp;
3728                 for (i = 0;i < numbackpoints*3;i++)
3729                         splitportal->points[i] = backpoints[i];
3730                 splitportal->numpoints = numbackpoints;
3731                 for (i = 0;i < numfrontpoints*3;i++)
3732                         portal->points[i] = frontpoints[i];
3733                 portal->numpoints = numfrontpoints;
3734
3735                 if (side == 0)
3736                 {
3737                         AddPortalToNodes(portal, front, other_node);
3738                         AddPortalToNodes(splitportal, back, other_node);
3739                 }
3740                 else
3741                 {
3742                         AddPortalToNodes(portal, other_node, front);
3743                         AddPortalToNodes(splitportal, other_node, back);
3744                 }
3745         }
3746
3747         Mod_BSP_RecursiveNodePortals(front);
3748         Mod_BSP_RecursiveNodePortals(back);
3749
3750         portalpointsbufferoffset -= 6*MAX_PORTALPOINTS;
3751 }
3752
3753 static void Mod_BSP_MakePortals(void)
3754 {
3755         Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
3756         portalpointsbufferoffset = 0;
3757         portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
3758         portalpointsbuffer = (double *)Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
3759         Mod_BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
3760         Mem_Free(portalpointsbuffer);
3761         portalpointsbuffer = NULL;
3762         portalpointsbufferoffset = 0;
3763         portalpointsbuffersize = 0;
3764         Mod_BSP_FinalizePortals();
3765         Mem_ExpandableArray_FreeArray(&portalarray);
3766 }
3767
3768 //Returns PVS data for a given point
3769 //(note: can return NULL)
3770 static unsigned char *Mod_BSP_GetPVS(model_t *model, const vec3_t p)
3771 {
3772         mnode_t *node;
3773         node = model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode;
3774         while (node->plane)
3775                 node = node->children[(node->plane->type < 3 ? p[node->plane->type] : DotProduct(p,node->plane->normal)) < node->plane->dist];
3776         if (((mleaf_t *)node)->clusterindex >= 0)
3777                 return model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3778         else
3779                 return NULL;
3780 }
3781
3782 static void Mod_BSP_FatPVS_RecursiveBSPNode(model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbytes, mnode_t *node)
3783 {
3784         while (node->plane)
3785         {
3786                 float d = PlaneDiff(org, node->plane);
3787                 if (d > radius)
3788                         node = node->children[0];
3789                 else if (d < -radius)
3790                         node = node->children[1];
3791                 else
3792                 {
3793                         // go down both sides
3794                         Mod_BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, pvsbytes, node->children[0]);
3795                         node = node->children[1];
3796                 }
3797         }
3798         // if this leaf is in a cluster, accumulate the pvs bits
3799         if (((mleaf_t *)node)->clusterindex >= 0)
3800         {
3801                 int i;
3802                 unsigned char *pvs = model->brush.data_pvsclusters + ((mleaf_t *)node)->clusterindex * model->brush.num_pvsclusterbytes;
3803                 for (i = 0;i < pvsbytes;i++)
3804                         pvsbuffer[i] |= pvs[i];
3805         }
3806 }
3807
3808 //Calculates a PVS that is the inclusive or of all leafs within radius pixels
3809 //of the given point.
3810 static int Mod_BSP_FatPVS(model_t *model, const vec3_t org, vec_t radius, unsigned char *pvsbuffer, int pvsbufferlength, qbool merge)
3811 {
3812         int bytes = model->brush.num_pvsclusterbytes;
3813         bytes = min(bytes, pvsbufferlength);
3814         if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_BSP_GetPVS(model, org))
3815         {
3816                 memset(pvsbuffer, 0xFF, bytes);
3817                 return bytes;
3818         }
3819         if (!merge)
3820                 memset(pvsbuffer, 0, bytes);
3821         Mod_BSP_FatPVS_RecursiveBSPNode(model, org, radius, pvsbuffer, bytes, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
3822         return bytes;
3823 }
3824
3825 static void Mod_Q1BSP_RoundUpToHullSize(model_t *cmodel, const vec3_t inmins, const vec3_t inmaxs, vec3_t outmins, vec3_t outmaxs)
3826 {
3827         vec3_t size;
3828         const hull_t *hull;
3829
3830         VectorSubtract(inmaxs, inmins, size);
3831         if (cmodel->brush.ishlbsp)
3832         {
3833                 if (size[0] < mod_q1bsp_zero_hullsize_cutoff.value)
3834                         hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3835                 else if (size[0] <= 32)
3836                 {
3837                         if (size[2] < 54) // pick the nearest of 36 or 72
3838                                 hull = &cmodel->brushq1.hulls[3]; // 32x32x36
3839                         else
3840                                 hull = &cmodel->brushq1.hulls[1]; // 32x32x72
3841                 }
3842                 else
3843                         hull = &cmodel->brushq1.hulls[2]; // 64x64x64
3844         }
3845         else
3846         {
3847                 if (size[0] < 3)
3848                         hull = &cmodel->brushq1.hulls[0]; // 0x0x0
3849                 else if (size[0] <= 32)
3850                         hull = &cmodel->brushq1.hulls[1]; // 32x32x56
3851                 else
3852                         hull = &cmodel->brushq1.hulls[2]; // 64x64x88
3853         }
3854         VectorCopy(inmins, outmins);
3855         VectorAdd(inmins, hull->clip_size, outmaxs);
3856 }
3857
3858 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);
3859
3860 void Mod_2PSB_Load(model_t *mod, void *buffer, void *bufferend)
3861 {
3862         mod->brush.isbsp2 = true;
3863         mod->brush.isbsp2rmqe = true; // like bsp2 except leaf/node bounds are 16bit (unexpanded)
3864         mod->modeldatatypestring = "Q1BSP2rmqe";
3865         Mod_Q1BSP_Load(mod, buffer, bufferend);
3866 }
3867
3868 void Mod_BSP2_Load(model_t *mod, void *buffer, void *bufferend)
3869 {
3870         mod->brush.isbsp2 = true;
3871         mod->modeldatatypestring = "Q1BSP2";
3872         Mod_Q1BSP_Load(mod, buffer, bufferend);
3873 }
3874
3875 void Mod_HLBSP_Load(model_t *mod, void *buffer, void *bufferend)
3876 {
3877         mod->brush.ishlbsp = true;
3878         mod->modeldatatypestring = "HLBSP";
3879         Mod_Q1BSP_Load(mod, buffer, bufferend);
3880 }
3881
3882 void Mod_Q1BSP_Load(model_t *mod, void *buffer, void *bufferend)
3883 {
3884         int i, j, k;
3885         sizebuf_t lumpsb[HEADER_LUMPS];
3886         mmodel_t *bm;
3887         float dist, modelyawradius, modelradius;
3888         msurface_t *surface;
3889         hullinfo_t hullinfo;
3890         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
3891         model_brush_lightstyleinfo_t styleinfo[256];
3892         unsigned char *datapointer;
3893         sizebuf_t sb;
3894
3895         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
3896
3897         mod->type = mod_brushq1;
3898
3899         mod->brush.skymasking = true;
3900         i = MSG_ReadLittleLong(&sb);
3901
3902         if(!mod->modeldatatypestring)
3903                 mod->modeldatatypestring = "Q1BSP";
3904
3905 // fill in hull info
3906         VectorClear (hullinfo.hullsizes[0][0]);
3907         VectorClear (hullinfo.hullsizes[0][1]);
3908         if (mod->brush.ishlbsp)
3909         {
3910                 hullinfo.filehulls = 4;
3911                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -36);
3912                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 36);
3913                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -32);
3914                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 32);
3915                 VectorSet (hullinfo.hullsizes[3][0], -16, -16, -18);
3916                 VectorSet (hullinfo.hullsizes[3][1], 16, 16, 18);
3917         }
3918         else
3919         {
3920                 hullinfo.filehulls = 4;
3921                 VectorSet (hullinfo.hullsizes[1][0], -16, -16, -24);
3922                 VectorSet (hullinfo.hullsizes[1][1], 16, 16, 32);
3923                 VectorSet (hullinfo.hullsizes[2][0], -32, -32, -24);
3924                 VectorSet (hullinfo.hullsizes[2][1], 32, 32, 64);
3925         }
3926
3927 // read lumps
3928         for (i = 0; i < HEADER_LUMPS; i++)
3929         {
3930                 int offset = MSG_ReadLittleLong(&sb);
3931                 int size = MSG_ReadLittleLong(&sb);
3932                 if (offset < 0 || offset + size > sb.cursize)
3933                         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);
3934                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
3935         }
3936
3937         mod->soundfromcenter = true;
3938         mod->TraceBox = Mod_Q1BSP_TraceBox;
3939         mod->TraceLine = Mod_Q1BSP_TraceLine;
3940         mod->TracePoint = Mod_Q1BSP_TracePoint;
3941         mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
3942         mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
3943         mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
3944         mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
3945         mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
3946         mod->brush.GetPVS = Mod_BSP_GetPVS;
3947         mod->brush.FatPVS = Mod_BSP_FatPVS;
3948         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
3949         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
3950         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
3951         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
3952         mod->brush.LightPoint = Mod_BSP_LightPoint;
3953         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
3954         mod->brush.AmbientSoundLevelsForPoint = Mod_Q1BSP_AmbientSoundLevelsForPoint;
3955         mod->brush.RoundUpToHullSize = Mod_Q1BSP_RoundUpToHullSize;
3956         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
3957         mod->Draw = R_Mod_Draw;
3958         mod->DrawDepth = R_Mod_DrawDepth;
3959         mod->DrawDebug = R_Mod_DrawDebug;
3960         mod->DrawPrepass = R_Mod_DrawPrepass;
3961         mod->GetLightInfo = R_Mod_GetLightInfo;
3962         mod->CompileShadowMap = R_Mod_CompileShadowMap;
3963         mod->DrawShadowMap = R_Mod_DrawShadowMap;
3964         mod->DrawLight = R_Mod_DrawLight;
3965
3966 // load into heap
3967
3968         mod->brush.qw_md4sum = 0;
3969         mod->brush.qw_md4sum2 = 0;
3970         for (i = 0;i < HEADER_LUMPS;i++)
3971         {
3972                 int temp;
3973                 if (i == LUMP_ENTITIES)
3974                         continue;
3975                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
3976                 mod->brush.qw_md4sum ^= LittleLong(temp);
3977                 if (i == LUMP_VISIBILITY || i == LUMP_LEAFS || i == LUMP_NODES)
3978                         continue;
3979                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
3980         }
3981
3982         Mod_Q1BSP_LoadEntities(&lumpsb[LUMP_ENTITIES]);
3983         Mod_Q1BSP_LoadVertexes(&lumpsb[LUMP_VERTEXES]);
3984         Mod_Q1BSP_LoadEdges(&lumpsb[LUMP_EDGES]);
3985         Mod_Q1BSP_LoadSurfedges(&lumpsb[LUMP_SURFEDGES]);
3986         Mod_Q1BSP_LoadTextures(&lumpsb[LUMP_TEXTURES]);
3987         Mod_Q1BSP_LoadLighting(&lumpsb[LUMP_LIGHTING]);
3988         Mod_Q1BSP_LoadPlanes(&lumpsb[LUMP_PLANES]);
3989         Mod_Q1BSP_LoadTexinfo(&lumpsb[LUMP_TEXINFO]);
3990         Mod_Q1BSP_LoadFaces(&lumpsb[LUMP_FACES]);
3991         Mod_Q1BSP_LoadLeaffaces(&lumpsb[LUMP_MARKSURFACES]);
3992         Mod_Q1BSP_LoadVisibility(&lumpsb[LUMP_VISIBILITY]);
3993         // load submodels before leafs because they contain the number of vis leafs
3994         Mod_BSP_LoadSubmodels(&lumpsb[LUMP_MODELS], &hullinfo);
3995         Mod_Q1BSP_LoadLeafs(&lumpsb[LUMP_LEAFS]);
3996         Mod_Q1BSP_LoadNodes(&lumpsb[LUMP_NODES]);
3997         Mod_Q1BSP_LoadClipnodes(&lumpsb[LUMP_CLIPNODES], &hullinfo);
3998
3999         for (i = 0; i < HEADER_LUMPS; i++)
4000                 if (lumpsb[i].readcount != lumpsb[i].cursize && i != LUMP_TEXTURES && i != LUMP_LIGHTING)
4001                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4002
4003         // check if the map supports transparent water rendering
4004         loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
4005
4006         // we don't need the compressed pvs data anymore
4007         if (mod->brushq1.data_compressedpvs)
4008                 Mem_Free(mod->brushq1.data_compressedpvs);
4009         mod->brushq1.data_compressedpvs = NULL;
4010         mod->brushq1.num_compressedpvs = 0;
4011
4012         Mod_Q1BSP_MakeHull0();
4013         if (mod_bsp_portalize.integer)
4014                 Mod_BSP_MakePortals();
4015
4016         mod->numframes = 2;             // regular and alternate animation
4017         mod->numskins = 1;
4018
4019         if (loadmodel->brush.numsubmodels)
4020                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4021
4022         // LadyHavoc: to clear the fog around the original quake submodel code, I
4023         // will explain:
4024         // first of all, some background info on the submodels:
4025         // model 0 is the map model (the world, named maps/e1m1.bsp for example)
4026         // model 1 and higher are submodels (doors and the like, named *1, *2, etc)
4027         // now the weird for loop itself:
4028         // the loop functions in an odd way, on each iteration it sets up the
4029         // current 'mod' model (which despite the confusing code IS the model of
4030         // the number i), at the end of the loop it duplicates the model to become
4031         // the next submodel, and loops back to set up the new submodel.
4032
4033         // LadyHavoc: now the explanation of my sane way (which works identically):
4034         // set up the world model, then on each submodel copy from the world model
4035         // and set up the submodel with the respective model info.
4036         totalstylesurfaces = 0;
4037         totalstyles = 0;
4038         for (i = 0;i < mod->brush.numsubmodels;i++)
4039         {
4040                 memset(stylecounts, 0, sizeof(stylecounts));
4041                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4042                 {
4043                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4044                         for (j = 0;j < MAXLIGHTMAPS;j++)
4045                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4046                 }
4047                 for (k = 0;k < 255;k++)
4048                 {
4049                         totalstyles++;
4050                         if (stylecounts[k])
4051                                 totalstylesurfaces += stylecounts[k];
4052                 }
4053         }
4054         datapointer = (unsigned char *)Mem_Alloc(mod->mempool, mod->num_surfaces * sizeof(int) + totalstyles * sizeof(model_brush_lightstyleinfo_t) + totalstylesurfaces * sizeof(int *));
4055         mod->modelsurfaces_sorted = (int*)datapointer;datapointer += mod->num_surfaces * sizeof(int);
4056         for (i = 0;i < mod->brush.numsubmodels;i++)
4057         {
4058                 // LadyHavoc: this code was originally at the end of this loop, but
4059                 // has been transformed to something more readable at the start here.
4060
4061                 if (i > 0)
4062                 {
4063                         char name[10];
4064                         // duplicate the basic information
4065                         dpsnprintf(name, sizeof(name), "*%i", i);
4066                         mod = Mod_FindName(name, loadmodel->name);
4067                         // copy the base model to this one
4068                         *mod = *loadmodel;
4069                         // rename the clone back to its proper name
4070                         strlcpy(mod->name, name, sizeof(mod->name));
4071                         mod->brush.parentmodel = loadmodel;
4072                         // textures and memory belong to the main model
4073                         mod->texturepool = NULL;
4074                         mod->mempool = NULL;
4075                         mod->brush.GetPVS = NULL;
4076                         mod->brush.FatPVS = NULL;
4077                         mod->brush.BoxTouchingPVS = NULL;
4078                         mod->brush.BoxTouchingLeafPVS = NULL;
4079                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4080                         mod->brush.FindBoxClusters = NULL;
4081                         mod->brush.LightPoint = NULL;
4082                         mod->brush.AmbientSoundLevelsForPoint = NULL;
4083                 }
4084
4085                 mod->brush.submodel = i;
4086
4087                 if (loadmodel->brush.submodels)
4088                         loadmodel->brush.submodels[i] = mod;
4089
4090                 bm = &mod->brushq1.submodels[i];
4091
4092                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
4093                 for (j=1 ; j<MAX_MAP_HULLS ; j++)
4094                 {
4095                         mod->brushq1.hulls[j].firstclipnode = bm->headnode[j];
4096                         mod->brushq1.hulls[j].lastclipnode = mod->brushq1.numclipnodes - 1;
4097                 }
4098
4099                 mod->submodelsurfaces_start = bm->firstface;
4100                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
4101
4102                 // set node/leaf parents for this submodel
4103                 Mod_BSP_LoadNodes_RecursiveSetParent(mod->brush.data_nodes + mod->brushq1.hulls[0].firstclipnode, NULL);
4104
4105                 // this has to occur after hull info has been set, as it uses Mod_Q1BSP_PointSuperContents
4106                 Mod_Q1BSP_AssignNoShadowSkySurfaces(mod);
4107
4108                 // copy the submodel bounds, then enlarge the yaw and rotated bounds according to radius
4109                 // (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)
4110                 VectorCopy(bm->mins, mod->normalmins);
4111                 VectorCopy(bm->maxs, mod->normalmaxs);
4112                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
4113                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
4114                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
4115                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
4116                 modelradius = modelyawradius + modelradius * modelradius;
4117                 modelyawradius = sqrt(modelyawradius);
4118                 modelradius = sqrt(modelradius);
4119                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
4120                 mod->yawmins[2] = mod->normalmins[2];
4121                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
4122                 mod->yawmaxs[2] = mod->normalmaxs[2];
4123                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
4124                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
4125                 mod->radius = modelradius;
4126                 mod->radius2 = modelradius * modelradius;
4127
4128                 Mod_SetDrawSkyAndWater(mod);
4129
4130                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
4131                 {
4132                         // build lightstyle update chains
4133                         // (used to rapidly mark lightmapupdateflags on many surfaces
4134                         // when d_lightstylevalue changes)
4135                         memset(stylecounts, 0, sizeof(stylecounts));
4136                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4137                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4138                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
4139                         mod->brushq1.num_lightstyles = 0;
4140                         for (k = 0;k < 255;k++)
4141                         {
4142                                 if (stylecounts[k])
4143                                 {
4144                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
4145                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
4146                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
4147                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = (int *)datapointer;datapointer += stylecounts[k] * sizeof(int);
4148                                         remapstyles[k] = mod->brushq1.num_lightstyles;
4149                                         mod->brushq1.num_lightstyles++;
4150                                 }
4151                         }
4152                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
4153                         {
4154                                 surface = mod->data_surfaces + k;
4155                                 for (j = 0;j < MAXLIGHTMAPS;j++)
4156                                 {
4157                                         if (surface->lightmapinfo->styles[j] != 255)
4158                                         {
4159                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
4160                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
4161                                         }
4162                                 }
4163                         }
4164                         mod->brushq1.data_lightstyleinfo = (model_brush_lightstyleinfo_t *)datapointer;datapointer += mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t);
4165                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
4166                 }
4167                 else
4168                 {
4169                         // LadyHavoc: empty submodel(lacrima.bsp has such a glitch)
4170                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
4171                 }
4172                 //mod->brushq1.num_visleafs = bm->visleafs;
4173
4174                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
4175                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
4176
4177                 if (mod_q1bsp_polygoncollisions.integer)
4178                 {
4179                         mod->collision_bih = mod->render_bih;
4180                         // point traces and contents checks still use the bsp tree
4181                         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4182                         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4183                         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4184                         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
4185                 }
4186
4187                 // generate VBOs and other shared data before cloning submodels
4188                 if (i == 0)
4189                 {
4190                         Mod_BuildVBOs();
4191                         Mod_Q1BSP_LoadMapBrushes();
4192                         //Mod_Q1BSP_ProcessLightList();
4193                 }
4194         }
4195         mod = loadmodel;
4196
4197         // make the model surface list (used by shadowing/lighting)
4198         Mod_MakeSortedSurfaces(loadmodel);
4199
4200         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);
4201 }
4202
4203 int Mod_Q2BSP_SuperContentsFromNativeContents(int nativecontents)
4204 {
4205         int supercontents = 0;
4206         if (nativecontents & CONTENTSQ2_SOLID)
4207                 supercontents |= SUPERCONTENTS_SOLID;
4208         if (nativecontents & CONTENTSQ2_WATER)
4209                 supercontents |= SUPERCONTENTS_WATER;
4210         if (nativecontents & CONTENTSQ2_SLIME)
4211                 supercontents |= SUPERCONTENTS_SLIME;
4212         if (nativecontents & CONTENTSQ2_LAVA)
4213                 supercontents |= SUPERCONTENTS_LAVA;
4214         if (nativecontents & CONTENTSQ2_MONSTER)
4215                 supercontents |= SUPERCONTENTS_BODY;
4216         if (nativecontents & CONTENTSQ2_DEADMONSTER)
4217                 supercontents |= SUPERCONTENTS_CORPSE;
4218         if (nativecontents & CONTENTSQ2_PLAYERCLIP)
4219                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
4220         if (nativecontents & CONTENTSQ2_MONSTERCLIP)
4221                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
4222         if (!(nativecontents & CONTENTSQ2_TRANSLUCENT))
4223                 supercontents |= SUPERCONTENTS_OPAQUE;
4224         return supercontents;
4225 }
4226
4227 int Mod_Q2BSP_NativeContentsFromSuperContents(int supercontents)
4228 {
4229         int nativecontents = 0;
4230         if (supercontents & SUPERCONTENTS_SOLID)
4231                 nativecontents |= CONTENTSQ2_SOLID;
4232         if (supercontents & SUPERCONTENTS_WATER)
4233                 nativecontents |= CONTENTSQ2_WATER;
4234         if (supercontents & SUPERCONTENTS_SLIME)
4235                 nativecontents |= CONTENTSQ2_SLIME;
4236         if (supercontents & SUPERCONTENTS_LAVA)
4237                 nativecontents |= CONTENTSQ2_LAVA;
4238         if (supercontents & SUPERCONTENTS_BODY)
4239                 nativecontents |= CONTENTSQ2_MONSTER;
4240         if (supercontents & SUPERCONTENTS_CORPSE)
4241                 nativecontents |= CONTENTSQ2_DEADMONSTER;
4242         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
4243                 nativecontents |= CONTENTSQ2_PLAYERCLIP;
4244         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
4245                 nativecontents |= CONTENTSQ2_MONSTERCLIP;
4246         if (!(supercontents & SUPERCONTENTS_OPAQUE))
4247                 nativecontents |= CONTENTSQ2_TRANSLUCENT;
4248         return nativecontents;
4249 }
4250
4251 static void Mod_Q2BSP_LoadVisibility(sizebuf_t *sb)
4252 {
4253         int i, count;
4254         loadmodel->brushq1.num_compressedpvs = 0;
4255         loadmodel->brushq1.data_compressedpvs = NULL;
4256         loadmodel->brush.num_pvsclusters = 0;
4257         loadmodel->brush.num_pvsclusterbytes = 0;
4258         loadmodel->brush.data_pvsclusters = NULL;
4259
4260         if (!sb->cursize)
4261                 return;
4262
4263         count = MSG_ReadLittleLong(sb);
4264         loadmodel->brush.num_pvsclusters = count;
4265         loadmodel->brush.num_pvsclusterbytes = (count+7)>>3;
4266         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*loadmodel->brush.num_pvsclusterbytes);
4267         for (i = 0;i < count;i++)
4268         {
4269                 int pvsofs = MSG_ReadLittleLong(sb);
4270                 /*int phsofs = */MSG_ReadLittleLong(sb);
4271                 // decompress the vis data for this cluster
4272                 // (note this accesses the underlying data store of sb, which is kind of evil)
4273                 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);
4274         }
4275         // hush the loading error check later - we had to do random access on this lump, so we didn't read to the end
4276         sb->readcount = sb->cursize;
4277 }
4278
4279 static void Mod_Q2BSP_LoadNodes(sizebuf_t *sb)
4280 {
4281         int                     i, j, count, p, child[2];
4282         mnode_t         *out;
4283         int structsize = 28;
4284
4285         if (sb->cursize % structsize)
4286                 Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
4287         count = sb->cursize / structsize;
4288         if (count == 0)
4289                 Host_Error("Mod_Q2BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
4290         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4291
4292         loadmodel->brush.data_nodes = out;
4293         loadmodel->brush.num_nodes = count;
4294
4295         for ( i=0 ; i<count ; i++, out++)
4296         {
4297                 p = MSG_ReadLittleLong(sb);
4298                 out->plane = loadmodel->brush.data_planes + p;
4299                 child[0] = MSG_ReadLittleLong(sb);
4300                 child[1] = MSG_ReadLittleLong(sb);
4301                 out->mins[0] = MSG_ReadLittleShort(sb);
4302                 out->mins[1] = MSG_ReadLittleShort(sb);
4303                 out->mins[2] = MSG_ReadLittleShort(sb);
4304                 out->maxs[0] = MSG_ReadLittleShort(sb);
4305                 out->maxs[1] = MSG_ReadLittleShort(sb);
4306                 out->maxs[2] = MSG_ReadLittleShort(sb);
4307                 out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
4308                 out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
4309                 if (out->firstsurface + out->numsurfaces > (unsigned int)loadmodel->num_surfaces)
4310                 {
4311                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid surface index range %i+%i (file has only %i surfaces)\n", out->firstsurface, out->numsurfaces, loadmodel->num_surfaces);
4312                         out->firstsurface = 0;
4313                         out->numsurfaces = 0;
4314                 }
4315                 for (j=0 ; j<2 ; j++)
4316                 {
4317                         p = child[j];
4318                         if (p >= 0)
4319                         {
4320                                 if (p < loadmodel->brush.num_nodes)
4321                                         out->children[j] = loadmodel->brush.data_nodes + p;
4322                                 else
4323                                 {
4324                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
4325                                         // map it to the solid leaf
4326                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4327                                 }
4328                         }
4329                         else
4330                         {
4331                                 // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
4332                                 p = -(p+1);
4333                                 if (p < loadmodel->brush.num_leafs)
4334                                         out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
4335                                 else
4336                                 {
4337                                         Con_Printf("Mod_Q2BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
4338                                         // map it to the solid leaf
4339                                         out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
4340                                 }
4341                         }
4342                 }
4343         }
4344
4345         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);        // sets nodes and leafs
4346 }
4347
4348 static void Mod_Q2BSP_LoadTexinfo(sizebuf_t *sb)
4349 {
4350         mtexinfo_t *out;
4351         int i, l, count;
4352         int structsize = 76;
4353         int maxtextures = 1024; // hardcoded limit of quake2 engine, so we may as well use it as an upper bound
4354         char filename[MAX_QPATH];
4355
4356         if (sb->cursize % structsize)
4357                 Host_Error("Mod_Q2BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
4358         count = sb->cursize / structsize;
4359         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4360         loadmodel->brushq1.texinfo = out;
4361         loadmodel->brushq1.numtexinfo = count;
4362         loadmodel->num_texturesperskin = 0;
4363         loadmodel->data_textures = (texture_t*)Mem_Alloc(loadmodel->mempool, maxtextures * sizeof(texture_t));
4364
4365         for (i = 0;i < count;i++, out++)
4366         {
4367                 int j, k;
4368                 for (k = 0;k < 2;k++)
4369                         for (j = 0;j < 4;j++)
4370                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
4371
4372                 out->q2flags = MSG_ReadLittleLong(sb);
4373                 out->q2value = MSG_ReadLittleLong(sb);
4374                 MSG_ReadBytes(sb, 32, (unsigned char*)out->q2texture);
4375                 out->q2texture[31] = 0; // make absolutely sure it is terminated
4376                 out->q2nexttexinfo = MSG_ReadLittleLong(sb);
4377
4378                 // find an existing match for the texture if possible
4379                 dpsnprintf(filename, sizeof(filename), "textures/%s.wal", out->q2texture);
4380                 for (j = 0;j < loadmodel->num_texturesperskin;j++)
4381                         if (!strcmp(filename, loadmodel->data_textures[j].name)
4382                          && out->q2flags == loadmodel->data_textures[j].q2flags
4383                          && out->q2value == loadmodel->data_textures[j].q2value)
4384                                 break;
4385                 // if we don't find the texture, store the new texture
4386                 if (j == loadmodel->num_texturesperskin)
4387                 {
4388                         if (loadmodel->num_texturesperskin < maxtextures)
4389                         {
4390                                 texture_t *tx = loadmodel->data_textures + j;
4391                                 int q2flags = out->q2flags;
4392                                 unsigned char *walfile = NULL;
4393                                 fs_offset_t walfilesize = 0;
4394                                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, tx, filename, true, true, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
4395                                 // now read the .wal file to get metadata (even if a .tga was overriding it, we still need the wal data)
4396                                 walfile = FS_LoadFile(filename, tempmempool, true, &walfilesize);
4397                                 if (walfile)
4398                                 {
4399                                         int w, h;
4400                                         LoadWAL_GetMetadata(walfile, (int)walfilesize, &w, &h, NULL, NULL, &tx->q2contents, NULL);
4401                                         tx->width = w;
4402                                         tx->height = h;
4403                                         Mem_Free(walfile);
4404                                 }
4405                                 else
4406                                 {
4407                                         tx->width = 16;
4408                                         tx->height = 16;
4409                                 }
4410                                 tx->q2flags = out->q2flags;
4411                                 tx->q2value = out->q2value;
4412                                 // also modify the texture to have the correct contents and such based on flags
4413                                 // note that we create multiple texture_t structures if q2flags differs
4414                                 if (q2flags & Q2SURF_LIGHT)
4415                                 {
4416                                         // doesn't mean anything to us
4417                                 }
4418                                 if (q2flags & Q2SURF_SLICK)
4419                                 {
4420                                         // would be nice to support...
4421                                 }
4422                                 if (q2flags & Q2SURF_SKY)
4423                                 {
4424                                         // sky is a rather specific thing
4425                                         q2flags &= ~Q2SURF_NODRAW; // quake2 had a slightly different meaning than we have in mind here...
4426                                         tx->basematerialflags = MATERIALFLAG_SKY;
4427                                         tx->supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE;
4428                                         tx->surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
4429                                 }
4430                                 if (q2flags & Q2SURF_WARP)
4431                                 {
4432                                         // we use a scroll instead of a warp
4433                                         tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_FULLBRIGHT;
4434                                         // if it's also transparent, we can enable the WATERSHADER
4435                                         // but we do not set the WATERALPHA flag because we don't
4436                                         // want to honor r_wateralpha in q2bsp
4437                                         // (it would go against the artistic intent)
4438                                         if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66))
4439                                                 tx->basematerialflags |= MATERIALFLAG_WATERSHADER;
4440                                 }
4441                                 if (q2flags & Q2SURF_TRANS33)
4442                                 {
4443                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4444                                         tx->basealpha = 1.0f / 3.0f;
4445                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4446                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4447                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4448                                 }
4449                                 if (q2flags & Q2SURF_TRANS66)
4450                                 {
4451                                         tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
4452                                         tx->basealpha = 2.0f / 3.0f;
4453                                         tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
4454                                         if (tx->q2contents & Q2CONTENTS_SOLID)
4455                                                 tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
4456                                 }
4457                                 if ((q2flags & Q2SURF_FLOWING) && tx->materialshaderpass != NULL)
4458                                 {
4459                                         tx->materialshaderpass->tcmods[0].tcmod = Q3TCMOD_SCROLL;
4460                                         if (q2flags & Q2SURF_WARP)
4461                                                 tx->materialshaderpass->tcmods[0].parms[0] = -0.5f;
4462                                         else
4463                                                 tx->materialshaderpass->tcmods[0].parms[0] = -1.6f;
4464                                         tx->materialshaderpass->tcmods[0].parms[1] = 0.0f;
4465                                 }
4466                                 if (q2flags & Q2SURF_ALPHATEST)
4467                                 {
4468                                         // KMQUAKE2 and other modded engines added this flag for lit alpha tested surfaces
4469                                         tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
4470                                 }
4471                                 else if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66 | Q2SURF_WARP))
4472                                 {
4473                                         if (!mod_q2bsp_littransparentsurfaces.integer)
4474                                                 tx->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
4475                                 }
4476                                 if (q2flags & Q2SURF_NODRAW)
4477                                 {
4478                                         tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
4479                                 }
4480                                 if (tx->q2contents & (Q2CONTENTS_TRANSLUCENT | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_PLAYERCLIP))
4481                                         tx->q2contents |= Q2CONTENTS_DETAIL;
4482                                 if (!(tx->q2contents & (Q2CONTENTS_SOLID | Q2CONTENTS_WINDOW | Q2CONTENTS_AUX | Q2CONTENTS_LAVA | Q2CONTENTS_SLIME | Q2CONTENTS_WATER | Q2CONTENTS_MIST | Q2CONTENTS_PLAYERCLIP | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_MIST)))
4483                                         tx->q2contents |= Q2CONTENTS_SOLID;
4484                                 if (tx->q2flags & (Q2SURF_HINT | Q2SURF_SKIP))
4485                                         tx->q2contents = 0;
4486                                 tx->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(tx->q2contents);
4487                                 // set the current values to the base values
4488                                 tx->currentframe = tx;
4489                                 tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
4490                                 tx->currentmaterialflags = tx->basematerialflags;
4491                                 loadmodel->num_texturesperskin++;
4492                                 loadmodel->num_textures = loadmodel->num_texturesperskin;
4493                         }
4494                         else
4495                         {
4496                                 Con_Printf("Mod_Q2BSP_LoadTexinfo: max textures reached (%i)\n", maxtextures);
4497                                 j = 0; // use first texture and give up
4498                         }
4499                 }
4500                 // store the index we found for this texture
4501                 out->textureindex = j;
4502         }
4503
4504         // realloc the textures array now that we know how many we actually need
4505         loadmodel->data_textures = (texture_t*)Mem_Realloc(loadmodel->mempool, loadmodel->data_textures, loadmodel->num_texturesperskin * sizeof(texture_t));
4506
4507         // now assemble the texture chains
4508         // if we encounter the textures out of order, the later ones won't mark the earlier ones in a sequence, so the earlier
4509         for (i = 0, out = loadmodel->brushq1.texinfo;i < count;i++, out++)
4510         {
4511                 int j, k;
4512                 texture_t *t = loadmodel->data_textures + out->textureindex;
4513                 t->currentframe = t; // fix the reallocated pointer
4514
4515                 // if this is not animated, skip it
4516                 // if this is already processed, skip it (part of an existing sequence)
4517                 if (out->q2nexttexinfo == 0 || t->animated)
4518                         continue;
4519
4520                 // store the array of frames to use
4521                 t->animated = 2; // q2bsp animation
4522                 t->anim_total[0] = 0;
4523                 t->anim_total[1] = 0;
4524                 // gather up to 10 frames (we don't support more)
4525                 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)
4526                 {
4527                         // detect looping and stop there
4528                         if (t->anim_total[0] && loadmodel->brushq1.texinfo[j].textureindex == out->textureindex)
4529                                 break;
4530                         t->anim_frames[0][t->anim_total[0]++] = &loadmodel->data_textures[loadmodel->brushq1.texinfo[j].textureindex];
4531                 }
4532                 // we could look for the +a sequence here if this is the +0 sequence,
4533                 // but it seems that quake2 did not implement that (even though the
4534                 // files exist in the baseq2 content)
4535
4536                 // write the frame sequence to all the textures involved (just like
4537                 // in the q1bsp loader)
4538                 //
4539                 // note that this can overwrite the rest of the sequence - so if the
4540                 // start of a sequence is found later than the other parts of the
4541                 // sequence, it will go back and rewrite them correctly.
4542                 for (k = 0;k < t->anim_total[0];k++)
4543                 {
4544                         texture_t *txk = t->anim_frames[0][k];
4545                         txk->animated = t->animated;
4546                         txk->anim_total[0] = t->anim_total[0];
4547                         for (l = 0;l < t->anim_total[0];l++)
4548                                 txk->anim_frames[0][l] = t->anim_frames[0][l];
4549                 }
4550         }
4551 }
4552
4553 static void Mod_Q2BSP_LoadLighting(sizebuf_t *sb)
4554 {
4555         // LadyHavoc: this fits exactly the same format that we use in .lit files
4556         loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
4557         MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.lightdata);
4558 }
4559
4560 static void Mod_Q2BSP_LoadLeafs(sizebuf_t *sb)
4561 {
4562         mleaf_t *out;
4563         int i, j, count, firstmarksurface, nummarksurfaces, firstmarkbrush, nummarkbrushes;
4564         int structsize = 28;
4565
4566         if (sb->cursize % structsize)
4567                 Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
4568         count = sb->cursize / structsize;
4569         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
4570
4571         loadmodel->brush.data_leafs = out;
4572         loadmodel->brush.num_leafs = count;
4573
4574         // FIXME: this function could really benefit from some error checking
4575         for ( i=0 ; i<count ; i++, out++)
4576         {
4577                 out->contents = MSG_ReadLittleLong(sb);
4578                 out->clusterindex = MSG_ReadLittleShort(sb);
4579                 out->areaindex = MSG_ReadLittleShort(sb);
4580                 out->mins[0] = MSG_ReadLittleShort(sb);
4581                 out->mins[1] = MSG_ReadLittleShort(sb);
4582                 out->mins[2] = MSG_ReadLittleShort(sb);
4583                 out->maxs[0] = MSG_ReadLittleShort(sb);
4584                 out->maxs[1] = MSG_ReadLittleShort(sb);
4585                 out->maxs[2] = MSG_ReadLittleShort(sb);
4586
4587                 firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
4588                 nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
4589                 firstmarkbrush = (unsigned short)MSG_ReadLittleShort(sb);
4590                 nummarkbrushes  = (unsigned short)MSG_ReadLittleShort(sb);
4591
4592                 for (j = 0;j < 4;j++)
4593                         out->ambient_sound_level[j] = 0;
4594
4595                 if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
4596                 {
4597                         Con_Print("Mod_Q2BSP_LoadLeafs: invalid clusterindex\n");
4598                         out->clusterindex = -1;
4599                 }
4600
4601                 if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
4602                 {
4603                         out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
4604                         out->numleafsurfaces = nummarksurfaces;
4605                 }
4606                 else
4607                 {
4608                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
4609                         out->firstleafsurface = NULL;
4610                         out->numleafsurfaces = 0;
4611                 }
4612
4613                 if (firstmarkbrush >= 0 && firstmarkbrush + nummarkbrushes <= loadmodel->brush.num_leafbrushes)
4614                 {
4615                         out->firstleafbrush = loadmodel->brush.data_leafbrushes + firstmarkbrush;
4616                         out->numleafbrushes = nummarkbrushes;
4617                 }
4618                 else
4619                 {
4620                         Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafbrush range %i:%i outside range %i:%i\n", firstmarkbrush, firstmarkbrush+nummarkbrushes, 0, loadmodel->brush.num_leafbrushes);
4621                         out->firstleafbrush = NULL;
4622                         out->numleafbrushes = 0;
4623                 }
4624         }
4625 }
4626
4627 static void Mod_Q2BSP_LoadLeafBrushes(sizebuf_t *sb)
4628 {
4629         int i, j;
4630         int structsize = 2;
4631
4632         if (sb->cursize % structsize)
4633                 Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
4634         loadmodel->brush.num_leafbrushes = sb->cursize / structsize;
4635         loadmodel->brush.data_leafbrushes = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafbrushes * sizeof(int));
4636
4637         for (i = 0;i < loadmodel->brush.num_leafbrushes;i++)
4638         {
4639                 j = (unsigned short) MSG_ReadLittleShort(sb);
4640                 if (j >= loadmodel->brush.num_brushes)
4641                         Host_Error("Mod_Q1BSP_LoadLeafBrushes: bad brush number");
4642                 loadmodel->brush.data_leafbrushes[i] = j;
4643         }
4644 }
4645
4646 static void Mod_Q2BSP_LoadBrushSides(sizebuf_t *sb)
4647 {
4648         q3mbrushside_t *out;
4649         int i, n, count;
4650         int structsize = 4;
4651
4652         if (sb->cursize % structsize)
4653                 Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
4654         count = sb->cursize / structsize;
4655         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4656
4657         loadmodel->brush.data_brushsides = out;
4658         loadmodel->brush.num_brushsides = count;
4659
4660         for (i = 0;i < count;i++, out++)
4661         {
4662                 n = (unsigned short)MSG_ReadLittleShort(sb);
4663                 if (n < 0 || n >= loadmodel->brush.num_planes)
4664                         Host_Error("Mod_Q2BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
4665                 out->plane = loadmodel->brush.data_planes + n;
4666                 n = MSG_ReadLittleShort(sb);
4667                 if (n >= 0)
4668                 {
4669                         if (n >= loadmodel->brushq1.numtexinfo)
4670                                 Host_Error("Mod_Q2BSP_LoadBrushSides: invalid texinfo index %i (%i texinfos)", n, loadmodel->brushq1.numtexinfo);
4671                         out->texture = loadmodel->data_textures + loadmodel->brushq1.texinfo[n].textureindex;
4672                 }
4673                 else
4674                 {
4675                         //Con_Printf("Mod_Q2BSP_LoadBrushSides: brushside %i has texinfo index %i < 0, changing to generic texture!\n", i, n);
4676                         out->texture = &mod_q1bsp_texture_solid;
4677                 }
4678         }
4679 }
4680
4681 static void Mod_Q2BSP_LoadBrushes(sizebuf_t *sb)
4682 {
4683         q3mbrush_t *out;
4684         int i, j, firstside, numsides, contents, count, maxplanes, q3surfaceflags, supercontents;
4685         colplanef_t *planes;
4686         int structsize = 12;
4687         qbool brushmissingtextures;
4688         int numbrushesmissingtextures = 0;
4689         int numcreatedtextures = 0;
4690
4691         if (sb->cursize % structsize)
4692                 Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
4693         count = sb->cursize / structsize;
4694         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
4695
4696         loadmodel->brush.data_brushes = out;
4697         loadmodel->brush.num_brushes = count;
4698
4699         maxplanes = 0;
4700         planes = NULL;
4701
4702         for (i = 0; i < count; i++, out++)
4703         {
4704                 firstside = MSG_ReadLittleLong(sb);
4705                 numsides = MSG_ReadLittleLong(sb);
4706                 contents = MSG_ReadLittleLong(sb);
4707                 if (firstside < 0 || firstside + numsides > loadmodel->brush.num_brushsides)
4708                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", firstside, firstside + numsides, loadmodel->brush.num_brushsides);
4709
4710                 out->firstbrushside = loadmodel->brush.data_brushsides + firstside;
4711                 out->numbrushsides = numsides;
4712                 // convert the contents to our values
4713                 supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(contents);
4714
4715                 // problem: q2bsp brushes have contents but not a texture
4716                 // problem: q2bsp brushsides *may* have a texture or may not
4717                 // problem: all brushsides and brushes must have a texture for trace_hittexture functionality to work, and the collision code is engineered around this assumption
4718                 // solution: nasty hacks
4719                 brushmissingtextures = false;
4720                 out->texture = NULL;
4721                 for (j = 0; j < out->numbrushsides; j++)
4722                 {
4723                         if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4724                                 brushmissingtextures = true;
4725                         else
4726                         {
4727                                 // if we can find a matching texture on a brush side we can use it instead of creating one
4728                                 if (out->firstbrushside[j].texture->supercontents == supercontents)
4729                                         out->texture = out->firstbrushside[j].texture;
4730                         }
4731                 }
4732                 if (brushmissingtextures || out->texture == NULL)
4733                 {
4734                         numbrushesmissingtextures++;
4735                         // if we didn't find any appropriate texture (matching contents), we'll have to create one
4736                         // we could search earlier ones for a matching one but that can be slow
4737                         if (out->texture == NULL)
4738                         {
4739                                 texture_t *validtexture;
4740                                 validtexture = (texture_t *)Mem_Alloc(loadmodel->mempool, sizeof(texture_t));
4741                                 dpsnprintf(validtexture->name, sizeof(validtexture->name), "brushcollision%i", numcreatedtextures);
4742                                 validtexture->surfaceflags = 0;
4743                                 validtexture->supercontents = supercontents;
4744                                 numcreatedtextures++;
4745                                 out->texture = validtexture;
4746                         }
4747                         // out->texture now contains a texture with appropriate contents, copy onto any missing sides
4748                         for (j = 0; j < out->numbrushsides; j++)
4749                                 if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
4750                                         out->firstbrushside[j].texture = out->texture;
4751                 }
4752
4753                 // make a colbrush from the brush
4754                 q3surfaceflags = 0;
4755                 // make a list of mplane_t structs to construct a colbrush from
4756                 if (maxplanes < out->numbrushsides)
4757                 {
4758                         maxplanes = out->numbrushsides;
4759                         if (planes)
4760                                 Mem_Free(planes);
4761                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
4762                 }
4763                 for (j = 0;j < out->numbrushsides;j++)
4764                 {
4765                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
4766                         planes[j].dist = out->firstbrushside[j].plane->dist;
4767                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
4768                         planes[j].texture = out->firstbrushside[j].texture;
4769                         q3surfaceflags |= planes[j].q3surfaceflags;
4770                 }
4771                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
4772
4773                 // this whole loop can take a while (e.g. on redstarrepublic4)
4774                 CL_KeepaliveMessage(false);
4775         }
4776         if (planes)
4777                 Mem_Free(planes);
4778         if (numcreatedtextures)
4779                 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);
4780 }
4781
4782 static void Mod_Q2BSP_LoadPOP(sizebuf_t *sb)
4783 {
4784         // 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)
4785         sb->readcount = sb->cursize;
4786 }
4787
4788 static void Mod_Q2BSP_LoadAreas(sizebuf_t *sb)
4789 {
4790         // we currently don't use areas, they represent closable doors as vis blockers
4791         sb->readcount = sb->cursize;
4792 }
4793
4794 static void Mod_Q2BSP_LoadAreaPortals(sizebuf_t *sb)
4795 {
4796         // we currently don't use areas, they represent closable doors as vis blockers
4797         sb->readcount = sb->cursize;
4798 }
4799
4800 static void Mod_Q2BSP_FindSubmodelBrushRange_r(model_t *mod, mnode_t *node, int *first, int *last)
4801 {
4802         int i;
4803         mleaf_t *leaf;
4804         while (node->plane)
4805         {
4806                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, node->children[0], first, last);
4807                 node = node->children[1];
4808         }
4809         leaf = (mleaf_t*)node;
4810         for (i = 0;i < leaf->numleafbrushes;i++)
4811         {
4812                 int brushnum = leaf->firstleafbrush[i];
4813                 if (*first > brushnum)
4814                         *first = brushnum;
4815                 if (*last < brushnum)
4816                         *last = brushnum;
4817         }
4818 }
4819
4820 static void Mod_Q2BSP_Load(model_t *mod, void *buffer, void *bufferend)
4821 {
4822         int i, j, k;
4823         sizebuf_t lumpsb[Q2HEADER_LUMPS];
4824         mmodel_t *bm;
4825         float dist, modelyawradius, modelradius;
4826         msurface_t *surface;
4827         int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
4828         model_brush_lightstyleinfo_t styleinfo[256];
4829         unsigned char *datapointer;
4830         sizebuf_t sb;
4831
4832         MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
4833
4834         mod->type = mod_brushq2;
4835
4836         mod->brush.ishlbsp = false;
4837         mod->brush.isbsp2rmqe = false;
4838         mod->brush.isbsp2 = false;
4839         mod->brush.isq2bsp = true; // q1bsp loaders mostly work but we need a few tweaks
4840         mod->brush.isq3bsp = false;
4841         mod->brush.skymasking = true;
4842         mod->modeldatatypestring = "Q2BSP";
4843
4844         i = MSG_ReadLittleLong(&sb);
4845         if (i != Q2BSPMAGIC)
4846                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4847
4848         i = MSG_ReadLittleLong(&sb);
4849         if (i != Q2BSPVERSION)
4850                 Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
4851
4852 // read lumps
4853         for (i = 0; i < Q2HEADER_LUMPS; i++)
4854         {
4855                 int offset = MSG_ReadLittleLong(&sb);
4856                 int size = MSG_ReadLittleLong(&sb);
4857                 if (offset < 0 || offset + size > sb.cursize)
4858                         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);
4859                 MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
4860         }
4861
4862         mod->soundfromcenter = true;
4863         mod->TracePoint = Mod_CollisionBIH_TracePoint;
4864         mod->TraceLine = Mod_CollisionBIH_TraceLine;
4865         mod->TraceBox = Mod_CollisionBIH_TraceBox;
4866         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
4867         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
4868         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
4869         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
4870         mod->brush.SuperContentsFromNativeContents = Mod_Q2BSP_SuperContentsFromNativeContents;
4871         mod->brush.NativeContentsFromSuperContents = Mod_Q2BSP_NativeContentsFromSuperContents;
4872         mod->brush.GetPVS = Mod_BSP_GetPVS;
4873         mod->brush.FatPVS = Mod_BSP_FatPVS;
4874         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
4875         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
4876         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
4877         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
4878         mod->brush.LightPoint = Mod_BSP_LightPoint;
4879         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
4880         mod->brush.AmbientSoundLevelsForPoint = NULL;
4881         mod->brush.RoundUpToHullSize = NULL;
4882         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
4883         mod->Draw = R_Mod_Draw;
4884         mod->DrawDepth = R_Mod_DrawDepth;
4885         mod->DrawDebug = R_Mod_DrawDebug;
4886         mod->DrawPrepass = R_Mod_DrawPrepass;
4887         mod->GetLightInfo = R_Mod_GetLightInfo;
4888         mod->CompileShadowMap = R_Mod_CompileShadowMap;
4889         mod->DrawShadowMap = R_Mod_DrawShadowMap;
4890         mod->DrawLight = R_Mod_DrawLight;
4891
4892 // load into heap
4893
4894         mod->brush.qw_md4sum = 0;
4895         mod->brush.qw_md4sum2 = 0;
4896         for (i = 0;i < Q2HEADER_LUMPS;i++)
4897         {
4898                 int temp;
4899                 if (i == Q2LUMP_ENTITIES)
4900                         continue;
4901                 temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
4902                 mod->brush.qw_md4sum ^= LittleLong(temp);
4903                 if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
4904                         continue;
4905                 mod->brush.qw_md4sum2 ^= LittleLong(temp);
4906         }
4907
4908         // many of these functions are identical to Q1 loaders, so we use those where possible
4909         Mod_Q1BSP_LoadEntities(&lumpsb[Q2LUMP_ENTITIES]);
4910         Mod_Q1BSP_LoadVertexes(&lumpsb[Q2LUMP_VERTEXES]);
4911         Mod_Q1BSP_LoadEdges(&lumpsb[Q2LUMP_EDGES]);
4912         Mod_Q1BSP_LoadSurfedges(&lumpsb[Q2LUMP_SURFEDGES]);
4913         Mod_Q2BSP_LoadLighting(&lumpsb[Q2LUMP_LIGHTING]);
4914         Mod_Q1BSP_LoadPlanes(&lumpsb[Q2LUMP_PLANES]);
4915         Mod_Q2BSP_LoadTexinfo(&lumpsb[Q2LUMP_TEXINFO]);
4916         Mod_Q2BSP_LoadBrushSides(&lumpsb[Q2LUMP_BRUSHSIDES]);
4917         Mod_Q2BSP_LoadBrushes(&lumpsb[Q2LUMP_BRUSHES]);
4918         Mod_Q1BSP_LoadFaces(&lumpsb[Q2LUMP_FACES]);
4919         Mod_Q1BSP_LoadLeaffaces(&lumpsb[Q2LUMP_LEAFFACES]);
4920         Mod_Q2BSP_LoadLeafBrushes(&lumpsb[Q2LUMP_LEAFBRUSHES]);
4921         Mod_Q2BSP_LoadVisibility(&lumpsb[Q2LUMP_VISIBILITY]);
4922         Mod_Q2BSP_LoadPOP(&lumpsb[Q2LUMP_POP]);
4923         Mod_Q2BSP_LoadAreas(&lumpsb[Q2LUMP_AREAS]);
4924         Mod_Q2BSP_LoadAreaPortals(&lumpsb[Q2LUMP_AREAPORTALS]);
4925         Mod_Q2BSP_LoadLeafs(&lumpsb[Q2LUMP_LEAFS]);
4926         Mod_Q2BSP_LoadNodes(&lumpsb[Q2LUMP_NODES]);
4927         Mod_BSP_LoadSubmodels(&lumpsb[Q2LUMP_MODELS], NULL);
4928
4929         for (i = 0; i < Q2HEADER_LUMPS; i++)
4930                 if (lumpsb[i].readcount != lumpsb[i].cursize)
4931                         Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
4932
4933         // we don't actually set MATERIALFLAG_WATERALPHA on anything, so this
4934         // doesn't enable the cvar, just indicates that transparent water is OK
4935         loadmodel->brush.supportwateralpha = true;
4936
4937         // we don't need the compressed pvs data anymore
4938         if (mod->brushq1.data_compressedpvs)
4939                 Mem_Free(mod->brushq1.data_compressedpvs);
4940         mod->brushq1.data_compressedpvs = NULL;
4941         mod->brushq1.num_compressedpvs = 0;
4942
4943         // the MakePortals code works fine on the q2bsp data as well
4944         if (mod_bsp_portalize.integer)
4945                 Mod_BSP_MakePortals();
4946
4947         mod->numframes = 0;             // q2bsp animations are kind of special, frame is unbounded...
4948         mod->numskins = 1;
4949
4950         if (loadmodel->brush.numsubmodels)
4951                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
4952
4953         totalstylesurfaces = 0;
4954         totalstyles = 0;
4955         for (i = 0;i < mod->brush.numsubmodels;i++)
4956         {
4957                 memset(stylecounts, 0, sizeof(stylecounts));
4958                 for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
4959                 {
4960                         surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
4961                         for (j = 0;j < MAXLIGHTMAPS;j++)
4962                                 stylecounts[surface->lightmapinfo->styles[j]]++;
4963                 }
4964                 for (k = 0;k < 255;k++)
4965                 {
4966                         totalstyles++;
4967                         if (stylecounts[k])
4968                                 totalstylesurfaces += stylecounts[k];
4969                 }
4970         }
4971         datapointer = (unsigned char *)Mem_Alloc(mod->mempool, mod->num_surfaces * sizeof(int) + totalstyles * sizeof(model_brush_lightstyleinfo_t) + totalstylesurfaces * sizeof(int *));
4972         mod->modelsurfaces_sorted = (int*)datapointer; datapointer += mod->num_surfaces * sizeof(int);
4973         // set up the world model, then on each submodel copy from the world model
4974         // and set up the submodel with the respective model info.
4975         mod = loadmodel;
4976         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
4977         {
4978                 mnode_t *rootnode = NULL;
4979                 int firstbrush = loadmodel->brush.num_brushes, lastbrush = 0;
4980                 if (i > 0)
4981                 {
4982                         char name[10];
4983                         // duplicate the basic information
4984                         dpsnprintf(name, sizeof(name), "*%i", i);
4985                         mod = Mod_FindName(name, loadmodel->name);
4986                         // copy the base model to this one
4987                         *mod = *loadmodel;
4988                         // rename the clone back to its proper name
4989                         strlcpy(mod->name, name, sizeof(mod->name));
4990                         mod->brush.parentmodel = loadmodel;
4991                         // textures and memory belong to the main model
4992                         mod->texturepool = NULL;
4993                         mod->mempool = NULL;
4994                         mod->brush.GetPVS = NULL;
4995                         mod->brush.FatPVS = NULL;
4996                         mod->brush.BoxTouchingPVS = NULL;
4997                         mod->brush.BoxTouchingLeafPVS = NULL;
4998                         mod->brush.BoxTouchingVisibleLeafs = NULL;
4999                         mod->brush.FindBoxClusters = NULL;
5000                         mod->brush.LightPoint = NULL;
5001                         mod->brush.AmbientSoundLevelsForPoint = NULL;
5002                 }
5003                 mod->brush.submodel = i;
5004                 if (loadmodel->brush.submodels)
5005                         loadmodel->brush.submodels[i] = mod;
5006
5007                 bm = &mod->brushq1.submodels[i];
5008
5009                 // we store the headnode (there's only one in Q2BSP) as if it were the first hull
5010                 mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
5011
5012                 mod->submodelsurfaces_start = bm->firstface;
5013                 mod->submodelsurfaces_end = bm->firstface + bm->numfaces;
5014
5015                 // set node/leaf parents for this submodel
5016                 // note: if the root of this submodel is a leaf (headnode[0] < 0) then there is nothing to do...
5017                 // (this happens in base3.bsp)
5018                 if (bm->headnode[0] >= 0)
5019                         rootnode = mod->brush.data_nodes + bm->headnode[0];
5020                 else
5021                         rootnode = (mnode_t*)(mod->brush.data_leafs + -1 - bm->headnode[0]);
5022                 Mod_BSP_LoadNodes_RecursiveSetParent(rootnode, NULL);
5023
5024                 // make the model surface list (used by shadowing/lighting)
5025                 Mod_Q2BSP_FindSubmodelBrushRange_r(mod, rootnode, &firstbrush, &lastbrush);
5026                 if (firstbrush <= lastbrush)
5027                 {
5028                         mod->firstmodelbrush = firstbrush;
5029                         mod->nummodelbrushes = lastbrush + 1 - firstbrush;
5030                 }
5031                 else
5032                 {
5033                         mod->firstmodelbrush = 0;
5034                         mod->nummodelbrushes = 0;
5035                 }
5036
5037                 VectorCopy(bm->mins, mod->normalmins);
5038                 VectorCopy(bm->maxs, mod->normalmaxs);
5039                 dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
5040                 modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
5041                 modelyawradius = dist*dist+modelyawradius*modelyawradius;
5042                 modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
5043                 modelradius = modelyawradius + modelradius * modelradius;
5044                 modelyawradius = sqrt(modelyawradius);
5045                 modelradius = sqrt(modelradius);
5046                 mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
5047                 mod->yawmins[2] = mod->normalmins[2];
5048                 mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
5049                 mod->yawmaxs[2] = mod->normalmaxs[2];
5050                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
5051                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
5052                 mod->radius = modelradius;
5053                 mod->radius2 = modelradius * modelradius;
5054
5055                 Mod_SetDrawSkyAndWater(mod);
5056
5057                 // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
5058                 if (mod->submodelsurfaces_start < mod->submodelsurfaces_end)
5059                 {
5060                         // build lightstyle update chains
5061                         // (used to rapidly mark lightmapupdateflags on many surfaces
5062                         // when d_lightstylevalue changes)
5063                         memset(stylecounts, 0, sizeof(stylecounts));
5064                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5065                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5066                                         stylecounts[mod->data_surfaces[k].lightmapinfo->styles[j]]++;
5067                         mod->brushq1.num_lightstyles = 0;
5068                         for (k = 0;k < 255;k++)
5069                         {
5070                                 if (stylecounts[k])
5071                                 {
5072                                         styleinfo[mod->brushq1.num_lightstyles].style = k;
5073                                         styleinfo[mod->brushq1.num_lightstyles].value = 0;
5074                                         styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
5075                                         styleinfo[mod->brushq1.num_lightstyles].surfacelist = (int *)datapointer;datapointer += stylecounts[k] * sizeof(int);
5076                                         remapstyles[k] = mod->brushq1.num_lightstyles;
5077                                         mod->brushq1.num_lightstyles++;
5078                                 }
5079                         }
5080                         for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
5081                         {
5082                                 surface = mod->data_surfaces + k;
5083                                 for (j = 0;j < MAXLIGHTMAPS;j++)
5084                                 {
5085                                         if (surface->lightmapinfo->styles[j] != 255)
5086                                         {
5087                                                 int r = remapstyles[surface->lightmapinfo->styles[j]];
5088                                                 styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = k;
5089                                         }
5090                                 }
5091                         }
5092                         mod->brushq1.data_lightstyleinfo = (model_brush_lightstyleinfo_t *)datapointer;datapointer += mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t);
5093                         memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
5094                 }
5095                 else
5096                 {
5097                         Con_Printf(CON_WARN "warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
5098                 }
5099                 //mod->brushq1.num_visleafs = bm->visleafs;
5100
5101                 // build a Bounding Interval Hierarchy for culling triangles in light rendering
5102                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
5103
5104                 // build a Bounding Interval Hierarchy for culling brushes in collision detection
5105                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
5106
5107                 // generate VBOs and other shared data before cloning submodels
5108                 if (i == 0)
5109                         Mod_BuildVBOs();
5110         }
5111         mod = loadmodel;
5112
5113         // make the model surface list (used by shadowing/lighting)
5114         Mod_MakeSortedSurfaces(loadmodel);
5115
5116         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);
5117 }
5118
5119 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents);
5120 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents);
5121
5122 static void Mod_Q3BSP_LoadEntities(lump_t *l)
5123 {
5124         const char *data;
5125         char key[128], value[MAX_INPUTLINE];
5126         float v[3];
5127         loadmodel->brushq3.num_lightgrid_cellsize[0] = 64;
5128         loadmodel->brushq3.num_lightgrid_cellsize[1] = 64;
5129         loadmodel->brushq3.num_lightgrid_cellsize[2] = 128;
5130         if (!l->filelen)
5131                 return;
5132         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
5133         memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
5134         loadmodel->brush.entities[l->filelen] = 0;
5135         data = loadmodel->brush.entities;
5136         // some Q3 maps override the lightgrid_cellsize with a worldspawn key
5137         // VorteX: q3map2 FS-R generates tangentspace deluxemaps for q3bsp and sets 'deluxeMaps' key
5138         loadmodel->brushq3.deluxemapping = false;
5139         if (data && COM_ParseToken_Simple(&data, false, false, true) && com_token[0] == '{')
5140         {
5141                 while (1)
5142                 {
5143                         if (!COM_ParseToken_Simple(&data, false, false, true))
5144                                 break; // error
5145                         if (com_token[0] == '}')
5146                                 break; // end of worldspawn
5147                         if (com_token[0] == '_')
5148                                 strlcpy(key, com_token + 1, sizeof(key));
5149                         else
5150                                 strlcpy(key, com_token, sizeof(key));
5151                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
5152                                 key[strlen(key)-1] = 0;
5153                         if (!COM_ParseToken_Simple(&data, false, false, true))
5154                                 break; // error
5155                         strlcpy(value, com_token, sizeof(value));
5156                         if (!strcasecmp("gridsize", key)) // this one is case insensitive to 100% match q3map2
5157                         {
5158 #if _MSC_VER >= 1400
5159 #define sscanf sscanf_s
5160 #endif
5161 #if 0
5162                                 if (sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) == 3 && v[0] != 0 && v[1] != 0 && v[2] != 0)
5163                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5164 #else
5165                                 VectorSet(v, 64, 64, 128);
5166                                 if(sscanf(value, "%f %f %f", &v[0], &v[1], &v[2]) != 3)
5167                                         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]);
5168                                 if (v[0] != 0 && v[1] != 0 && v[2] != 0)
5169                                         VectorCopy(v, loadmodel->brushq3.num_lightgrid_cellsize);
5170 #endif
5171                         }
5172                         else if (!strcmp("deluxeMaps", key))
5173                         {
5174                                 if (!strcmp(com_token, "1"))
5175                                 {
5176                                         loadmodel->brushq3.deluxemapping = true;
5177                                         loadmodel->brushq3.deluxemapping_modelspace = true;
5178                                 }
5179                                 else if (!strcmp(com_token, "2"))
5180                                 {
5181                                         loadmodel->brushq3.deluxemapping = true;
5182                                         loadmodel->brushq3.deluxemapping_modelspace = false;
5183                                 }
5184                         }
5185                 }
5186         }
5187 }
5188
5189 static void Mod_Q3BSP_LoadTextures(lump_t *l)
5190 {
5191         q3dtexture_t *in;
5192         texture_t *out;
5193         int i, count;
5194
5195         in = (q3dtexture_t *)(mod_base + l->fileofs);
5196         if (l->filelen % sizeof(*in))
5197                 Host_Error("Mod_Q3BSP_LoadTextures: funny lump size in %s",loadmodel->name);
5198         count = l->filelen / sizeof(*in);
5199         out = (texture_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5200
5201         loadmodel->data_textures = out;
5202         loadmodel->num_textures = count;
5203         loadmodel->num_texturesperskin = loadmodel->num_textures;
5204
5205         for (i = 0;i < count;i++)
5206         {
5207                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5208                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5209                 Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, out + i, in[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
5210                 // restore the surfaceflags and supercontents
5211                 out[i].surfaceflags = LittleLong(in[i].surfaceflags);
5212                 out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
5213         }
5214 }
5215
5216 static void Mod_Q3BSP_LoadPlanes(lump_t *l)
5217 {
5218         q3dplane_t *in;
5219         mplane_t *out;
5220         int i, count;
5221
5222         in = (q3dplane_t *)(mod_base + l->fileofs);
5223         if (l->filelen % sizeof(*in))
5224                 Host_Error("Mod_Q3BSP_LoadPlanes: funny lump size in %s",loadmodel->name);
5225         count = l->filelen / sizeof(*in);
5226         out = (mplane_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5227
5228         loadmodel->brush.data_planes = out;
5229         loadmodel->brush.num_planes = count;
5230
5231         for (i = 0;i < count;i++, in++, out++)
5232         {
5233                 out->normal[0] = LittleFloat(in->normal[0]);
5234                 out->normal[1] = LittleFloat(in->normal[1]);
5235                 out->normal[2] = LittleFloat(in->normal[2]);
5236                 out->dist = LittleFloat(in->dist);
5237                 PlaneClassify(out);
5238         }
5239 }
5240
5241 static void Mod_Q3BSP_LoadBrushSides(lump_t *l)
5242 {
5243         q3dbrushside_t *in;
5244         q3mbrushside_t *out;
5245         int i, n, count;
5246
5247         in = (q3dbrushside_t *)(mod_base + l->fileofs);
5248         if (l->filelen % sizeof(*in))
5249                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5250         count = l->filelen / sizeof(*in);
5251         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5252
5253         loadmodel->brush.data_brushsides = out;
5254         loadmodel->brush.num_brushsides = count;
5255
5256         for (i = 0;i < count;i++, in++, out++)
5257         {
5258                 n = LittleLong(in->planeindex);
5259                 if (n < 0 || n >= loadmodel->brush.num_planes)
5260                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5261                 out->plane = loadmodel->brush.data_planes + n;
5262                 n = LittleLong(in->textureindex);
5263                 if (n < 0 || n >= loadmodel->num_textures)
5264                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5265                 out->texture = loadmodel->data_textures + n;
5266         }
5267 }
5268
5269 static void Mod_Q3BSP_LoadBrushSides_IG(lump_t *l)
5270 {
5271         q3dbrushside_ig_t *in;
5272         q3mbrushside_t *out;
5273         int i, n, count;
5274
5275         in = (q3dbrushside_ig_t *)(mod_base + l->fileofs);
5276         if (l->filelen % sizeof(*in))
5277                 Host_Error("Mod_Q3BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
5278         count = l->filelen / sizeof(*in);
5279         out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5280
5281         loadmodel->brush.data_brushsides = out;
5282         loadmodel->brush.num_brushsides = count;
5283
5284         for (i = 0;i < count;i++, in++, out++)
5285         {
5286                 n = LittleLong(in->planeindex);
5287                 if (n < 0 || n >= loadmodel->brush.num_planes)
5288                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
5289                 out->plane = loadmodel->brush.data_planes + n;
5290                 n = LittleLong(in->textureindex);
5291                 if (n < 0 || n >= loadmodel->num_textures)
5292                         Host_Error("Mod_Q3BSP_LoadBrushSides: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5293                 out->texture = loadmodel->data_textures + n;
5294         }
5295 }
5296
5297 static void Mod_Q3BSP_LoadBrushes(lump_t *l)
5298 {
5299         q3dbrush_t *in;
5300         q3mbrush_t *out;
5301         int i, j, n, c, count, maxplanes, q3surfaceflags;
5302         colplanef_t *planes;
5303
5304         in = (q3dbrush_t *)(mod_base + l->fileofs);
5305         if (l->filelen % sizeof(*in))
5306                 Host_Error("Mod_Q3BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
5307         count = l->filelen / sizeof(*in);
5308         out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5309
5310         loadmodel->brush.data_brushes = out;
5311         loadmodel->brush.num_brushes = count;
5312
5313         maxplanes = 0;
5314         planes = NULL;
5315
5316         for (i = 0;i < count;i++, in++, out++)
5317         {
5318                 n = LittleLong(in->firstbrushside);
5319                 c = LittleLong(in->numbrushsides);
5320                 if (n < 0 || n + c > loadmodel->brush.num_brushsides)
5321                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", n, n + c, loadmodel->brush.num_brushsides);
5322                 out->firstbrushside = loadmodel->brush.data_brushsides + n;
5323                 out->numbrushsides = c;
5324                 n = LittleLong(in->textureindex);
5325                 if (n < 0 || n >= loadmodel->num_textures)
5326                         Host_Error("Mod_Q3BSP_LoadBrushes: invalid textureindex %i (%i textures)", n, loadmodel->num_textures);
5327                 out->texture = loadmodel->data_textures + n;
5328
5329                 // make a list of mplane_t structs to construct a colbrush from
5330                 if (maxplanes < out->numbrushsides)
5331                 {
5332                         maxplanes = out->numbrushsides;
5333                         if (planes)
5334                                 Mem_Free(planes);
5335                         planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
5336                 }
5337                 q3surfaceflags = 0;
5338                 for (j = 0;j < out->numbrushsides;j++)
5339                 {
5340                         VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
5341                         planes[j].dist = out->firstbrushside[j].plane->dist;
5342                         planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
5343                         planes[j].texture = out->firstbrushside[j].texture;
5344                         q3surfaceflags |= planes[j].q3surfaceflags;
5345                 }
5346                 // make the colbrush from the planes
5347                 out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
5348
5349                 // this whole loop can take a while (e.g. on redstarrepublic4)
5350                 CL_KeepaliveMessage(false);
5351         }
5352         if (planes)
5353                 Mem_Free(planes);
5354 }
5355
5356 static void Mod_Q3BSP_LoadEffects(lump_t *l)
5357 {
5358         q3deffect_t *in;
5359         q3deffect_t *out;
5360         int i, n, count;
5361
5362         in = (q3deffect_t *)(mod_base + l->fileofs);
5363         if (l->filelen % sizeof(*in))
5364                 Host_Error("Mod_Q3BSP_LoadEffects: funny lump size in %s",loadmodel->name);
5365         count = l->filelen / sizeof(*in);
5366         out = (q3deffect_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5367
5368         loadmodel->brushq3.data_effects = out;
5369         loadmodel->brushq3.num_effects = count;
5370
5371         for (i = 0;i < count;i++, in++, out++)
5372         {
5373                 strlcpy (out->shadername, in->shadername, sizeof (out->shadername));
5374                 n = LittleLong(in->brushindex);
5375                 if (n >= loadmodel->brush.num_brushes)
5376                 {
5377                         Con_Printf("Mod_Q3BSP_LoadEffects: invalid brushindex %i (%i brushes), setting to -1\n", n, loadmodel->brush.num_brushes);
5378                         n = -1;
5379                 }
5380                 out->brushindex = n;
5381                 out->unknown = LittleLong(in->unknown);
5382         }
5383 }
5384
5385 static void Mod_Q3BSP_LoadVertices(lump_t *l)
5386 {
5387         q3dvertex_t *in;
5388         int i, count;
5389
5390         in = (q3dvertex_t *)(mod_base + l->fileofs);
5391         if (l->filelen % sizeof(*in))
5392                 Host_Error("Mod_Q3BSP_LoadVertices: funny lump size in %s",loadmodel->name);
5393         loadmodel->brushq3.num_vertices = count = l->filelen / sizeof(*in);
5394         loadmodel->brushq3.data_vertex3f = (float *)Mem_Alloc(loadmodel->mempool, count * (sizeof(float) * (3 + 3 + 2 + 2 + 4)));
5395         loadmodel->brushq3.data_normal3f = loadmodel->brushq3.data_vertex3f + count * 3;
5396         loadmodel->brushq3.data_texcoordtexture2f = loadmodel->brushq3.data_normal3f + count * 3;
5397         loadmodel->brushq3.data_texcoordlightmap2f = loadmodel->brushq3.data_texcoordtexture2f + count * 2;
5398         loadmodel->brushq3.data_color4f = loadmodel->brushq3.data_texcoordlightmap2f + count * 2;
5399
5400         for (i = 0;i < count;i++, in++)
5401         {
5402                 loadmodel->brushq3.data_vertex3f[i * 3 + 0] = LittleFloat(in->origin3f[0]);
5403                 loadmodel->brushq3.data_vertex3f[i * 3 + 1] = LittleFloat(in->origin3f[1]);
5404                 loadmodel->brushq3.data_vertex3f[i * 3 + 2] = LittleFloat(in->origin3f[2]);
5405                 loadmodel->brushq3.data_normal3f[i * 3 + 0] = LittleFloat(in->normal3f[0]);
5406                 loadmodel->brushq3.data_normal3f[i * 3 + 1] = LittleFloat(in->normal3f[1]);
5407                 loadmodel->brushq3.data_normal3f[i * 3 + 2] = LittleFloat(in->normal3f[2]);
5408                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 0] = LittleFloat(in->texcoord2f[0]);
5409                 loadmodel->brushq3.data_texcoordtexture2f[i * 2 + 1] = LittleFloat(in->texcoord2f[1]);
5410                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 0] = LittleFloat(in->lightmap2f[0]);
5411                 loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 1] = LittleFloat(in->lightmap2f[1]);
5412                 // svector/tvector are calculated later in face loading
5413                 if(mod_q3bsp_sRGBlightmaps.integer)
5414                 {
5415                         // if lightmaps are sRGB, vertex colors are sRGB too, so we need to linearize them
5416                         // note: when this is in use, lightmap color 128 is no longer neutral, but "sRGB half power" is
5417                         // working like this may be odd, but matches q3map2 -gamma 2.2
5418                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5419                         {
5420                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5421                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5422                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5423                                 // we fix the brightness consistently via lightmapscale
5424                         }
5425                         else
5426                         {
5427                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_LinearFloatFromsRGB(in->color4ub[0]);
5428                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_LinearFloatFromsRGB(in->color4ub[1]);
5429                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_LinearFloatFromsRGB(in->color4ub[2]);
5430                         }
5431                 }
5432                 else
5433                 {
5434                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5435                         {
5436                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[0]);
5437                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[1]);
5438                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[2]);
5439                         }
5440                         else
5441                         {
5442                                 loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
5443                                 loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
5444                                 loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
5445                         }
5446                 }
5447                 loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
5448                 if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
5449                         loadmodel->lit = true;
5450         }
5451 }
5452
5453 static void Mod_Q3BSP_LoadTriangles(lump_t *l)
5454 {
5455         int *in;
5456         int *out;
5457         int i, count;
5458
5459         in = (int *)(mod_base + l->fileofs);
5460         if (l->filelen % sizeof(int[3]))
5461                 Host_Error("Mod_Q3BSP_LoadTriangles: funny lump size in %s",loadmodel->name);
5462         count = l->filelen / sizeof(*in);
5463
5464         if(!loadmodel->brushq3.num_vertices)
5465         {
5466                 if (count)
5467                         Con_Printf("Mod_Q3BSP_LoadTriangles: %s has triangles but no vertexes, broken compiler, ignoring problem\n", loadmodel->name);
5468                 loadmodel->brushq3.num_triangles = 0;
5469                 return;
5470         }
5471
5472         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5473         loadmodel->brushq3.num_triangles = count / 3;
5474         loadmodel->brushq3.data_element3i = out;
5475
5476         for (i = 0;i < count;i++, in++, out++)
5477         {
5478                 *out = LittleLong(*in);
5479                 if (*out < 0 || *out >= loadmodel->brushq3.num_vertices)
5480                 {
5481                         Con_Printf("Mod_Q3BSP_LoadTriangles: invalid vertexindex %i (%i vertices), setting to 0\n", *out, loadmodel->brushq3.num_vertices);
5482                         *out = 0;
5483                 }
5484         }
5485 }
5486
5487 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
5488 {
5489         q3dlightmap_t *input_pointer;
5490         int i;
5491         int j;
5492         int k;
5493         int count;
5494         int powerx;
5495         int powery;
5496         int powerxy;
5497         int powerdxy;
5498         int endlightmap;
5499         int mergegoal;
5500         int lightmapindex;
5501         int realcount;
5502         int realindex;
5503         int mergedwidth;
5504         int mergedheight;
5505         int mergedcolumns;
5506         int mergedrows;
5507         int mergedrowsxcolumns;
5508         int size;
5509         int bytesperpixel;
5510         int rgbmap[3];
5511         unsigned char *c;
5512         unsigned char *mergedpixels;
5513         unsigned char *mergeddeluxepixels;
5514         unsigned char *mergebuf;
5515         char mapname[MAX_QPATH];
5516         qbool external;
5517         unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
5518         char vabuf[1024];
5519
5520         // defaults for q3bsp
5521         size = 128;
5522         bytesperpixel = 3;
5523         rgbmap[0] = 2;
5524         rgbmap[1] = 1;
5525         rgbmap[2] = 0;
5526         external = false;
5527         loadmodel->brushq3.lightmapsize = 128;
5528
5529         if (cls.state == ca_dedicated)
5530                 return;
5531
5532         if(mod_q3bsp_nolightmaps.integer)
5533         {
5534                 return;
5535         }
5536         else if(l->filelen)
5537         {
5538                 // prefer internal LMs for compatibility (a BSP contains no info on whether external LMs exist)
5539                 if (developer_loading.integer)
5540                         Con_Printf("Using internal lightmaps\n");
5541                 input_pointer = (q3dlightmap_t *)(mod_base + l->fileofs);
5542                 if (l->filelen % sizeof(*input_pointer))
5543                         Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
5544                 count = l->filelen / sizeof(*input_pointer);
5545                 for(i = 0; i < count; ++i)
5546                         inpixels[i] = input_pointer[i].rgb;
5547         }
5548         else
5549         {
5550                 // no internal lightmaps
5551                 // try external lightmaps
5552                 FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
5553                 inpixels[0] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, 0), false, false, false, NULL);
5554                 if(!inpixels[0])
5555                         return;
5556                 else
5557                         Con_Printf("Using external lightmaps\n");
5558
5559                 // using EXTERNAL lightmaps instead
5560                 if(image_width != (int) CeilPowerOf2(image_width) || image_width != image_height)
5561                         Con_Printf("Mod_Q3BSP_LoadLightmaps: irregularly sized external lightmap in %s",loadmodel->name);
5562
5563                 size = image_width;
5564                 bytesperpixel = 4;
5565                 rgbmap[0] = 0;
5566                 rgbmap[1] = 1;
5567                 rgbmap[2] = 2;
5568                 external = true;
5569
5570                 for(count = 1; ; ++count)
5571                 {
5572                         inpixels[count] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, count), false, false, false, NULL);
5573                         if(!inpixels[count])
5574                                 break; // we got all of them
5575                         if(image_width != size || image_height != size)
5576                         {
5577                                 Mem_Free(inpixels[count]);
5578                                 inpixels[count] = NULL;
5579                                 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);
5580                                 break;
5581                         }
5582                 }
5583         }
5584
5585         loadmodel->brushq3.lightmapsize = size;
5586         loadmodel->brushq3.num_originallightmaps = count;
5587
5588         // now check the surfaces to see if any of them index an odd numbered
5589         // lightmap, if so this is not a deluxemapped bsp file
5590         //
5591         // also check what lightmaps are actually used, because q3map2 sometimes
5592         // (always?) makes an unused one at the end, which
5593         // q3map2 sometimes (or always?) makes a second blank lightmap for no
5594         // reason when only one lightmap is used, which can throw off the
5595         // deluxemapping detection method, so check 2-lightmap bsp's specifically
5596         // to see if the second lightmap is blank, if so it is not deluxemapped.
5597         // VorteX: autodetect only if previous attempt to find "deluxeMaps" key
5598         // in Mod_Q3BSP_LoadEntities was failed
5599         if (!loadmodel->brushq3.deluxemapping)
5600         {
5601                 loadmodel->brushq3.deluxemapping = !(count & 1);
5602                 loadmodel->brushq3.deluxemapping_modelspace = true;
5603                 endlightmap = 0;
5604                 if (loadmodel->brushq3.deluxemapping)
5605                 {
5606                         int facecount = faceslump->filelen / sizeof(q3dface_t);
5607                         q3dface_t *faces = (q3dface_t *)(mod_base + faceslump->fileofs);
5608                         for (i = 0;i < facecount;i++)
5609                         {
5610                                 j = LittleLong(faces[i].lightmapindex);
5611                                 if (j >= 0)
5612                                 {
5613                                         endlightmap = max(endlightmap, j + 1);
5614                                         if ((j & 1) || j + 1 >= count)
5615                                         {
5616                                                 loadmodel->brushq3.deluxemapping = false;
5617                                                 break;
5618                                         }
5619                                 }
5620                         }
5621                 }
5622
5623                 // q3map2 sometimes (or always?) makes a second blank lightmap for no
5624                 // reason when only one lightmap is used, which can throw off the
5625                 // deluxemapping detection method, so check 2-lightmap bsp's specifically
5626                 // to see if the second lightmap is blank, if so it is not deluxemapped.
5627                 //
5628                 // further research has shown q3map2 sometimes creates a deluxemap and two
5629                 // blank lightmaps, which must be handled properly as well
5630                 if (endlightmap == 1 && count > 1)
5631                 {
5632                         c = inpixels[1];
5633                         for (i = 0;i < size*size;i++)
5634                         {
5635                                 if (c[bytesperpixel*i + rgbmap[0]])
5636                                         break;
5637                                 if (c[bytesperpixel*i + rgbmap[1]])
5638                                         break;
5639                                 if (c[bytesperpixel*i + rgbmap[2]])
5640                                         break;
5641                         }
5642                         if (i == size*size)
5643                         {
5644                                 // all pixels in the unused lightmap were black...
5645                                 loadmodel->brushq3.deluxemapping = false;
5646                         }
5647                 }
5648         }
5649
5650         Con_Printf("%s is %sdeluxemapped\n", loadmodel->name, loadmodel->brushq3.deluxemapping ? "" : "not ");
5651
5652         // figure out what the most reasonable merge power is within limits
5653
5654         // find the appropriate NxN dimensions to merge to, to avoid wasted space
5655         realcount = count >> (int)loadmodel->brushq3.deluxemapping;
5656
5657         // figure out how big the merged texture has to be
5658         mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
5659         mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
5660         while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
5661                 mergegoal /= 2;
5662         mergedwidth = mergegoal;
5663         mergedheight = mergegoal;
5664         // choose non-square size (2x1 aspect) if only half the space is used;
5665         // this really only happens when the entire set fits in one texture, if
5666         // there are multiple textures, we don't worry about shrinking the last
5667         // one to fit, because the driver prefers the same texture size on
5668         // consecutive draw calls...
5669         if (mergedwidth * mergedheight / 2 >= size*size*realcount)
5670                 mergedheight /= 2;
5671
5672         loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
5673         loadmodel->brushq3.num_lightmapmergedheightpower = 0;
5674         while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
5675                 loadmodel->brushq3.num_lightmapmergedwidthpower++;
5676         while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
5677                 loadmodel->brushq3.num_lightmapmergedheightpower++;
5678         loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
5679
5680         powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
5681         powery = loadmodel->brushq3.num_lightmapmergedheightpower;
5682         powerxy = powerx+powery;
5683         powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
5684
5685         mergedcolumns = 1 << powerx;
5686         mergedrows = 1 << powery;
5687         mergedrowsxcolumns = 1 << powerxy;
5688
5689         loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
5690         loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5691         if (loadmodel->brushq3.deluxemapping)
5692                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
5693
5694         mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
5695         mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
5696         for (i = 0;i < count;i++)
5697         {
5698                 // figure out which merged lightmap texture this fits into
5699                 realindex = i >> (int)loadmodel->brushq3.deluxemapping;
5700                 lightmapindex = i >> powerdxy;
5701
5702                 // choose the destination address
5703                 mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
5704                 mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
5705                 if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
5706                         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);
5707
5708                 // convert pixels from RGB or BGRA while copying them into the destination rectangle
5709                 for (j = 0;j < size;j++)
5710                 for (k = 0;k < size;k++)
5711                 {
5712                         mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
5713                         mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
5714                         mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
5715                         mergebuf[(j*mergedwidth+k)*4+3] = 255;
5716                 }
5717
5718                 // upload texture if this was the last tile being written to the texture
5719                 if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
5720                 {
5721                         if (loadmodel->brushq3.deluxemapping && (i & 1))
5722                                 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);
5723                         else
5724                         {
5725                                 if(mod_q3bsp_sRGBlightmaps.integer)
5726                                 {
5727                                         textype_t t;
5728                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5729                                         {
5730                                                 t = TEXTYPE_BGRA; // in stupid fallback mode, we upload lightmaps in sRGB form and just fix their brightness
5731                                                 // we fix the brightness consistently via lightmapscale
5732                                         }
5733                                         else
5734                                                 t = TEXTYPE_SRGB_BGRA; // normally, we upload lightmaps in sRGB form (possibly downconverted to linear)
5735                                         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);
5736                                 }
5737                                 else
5738                                 {
5739                                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
5740                                                 Image_MakesRGBColorsFromLinear_Lightmap(mergedpixels, mergedpixels, mergedwidth * mergedheight);
5741                                         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);
5742                                 }
5743                         }
5744                 }
5745         }
5746
5747         if (mergeddeluxepixels)
5748                 Mem_Free(mergeddeluxepixels);
5749         Mem_Free(mergedpixels);
5750         if(external)
5751         {
5752                 for(i = 0; i < count; ++i)
5753                         Mem_Free(inpixels[i]);
5754         }
5755 }
5756
5757 typedef struct patchtess_s
5758 {
5759         patchinfo_t info;
5760
5761         // Auxiliary data used only by patch loading code in Mod_Q3BSP_LoadFaces
5762         int surface_id;
5763         float lodgroup[6];
5764         float *originalvertex3f;
5765 } patchtess_t;
5766
5767 #define PATCHTESS_SAME_LODGROUP(a,b) \
5768         ( \
5769                 (a).lodgroup[0] == (b).lodgroup[0] && \
5770                 (a).lodgroup[1] == (b).lodgroup[1] && \
5771                 (a).lodgroup[2] == (b).lodgroup[2] && \
5772                 (a).lodgroup[3] == (b).lodgroup[3] && \
5773                 (a).lodgroup[4] == (b).lodgroup[4] && \
5774                 (a).lodgroup[5] == (b).lodgroup[5] \
5775         )
5776
5777 static void Mod_Q3BSP_LoadFaces(lump_t *l)
5778 {
5779         q3dface_t *in, *oldin;
5780         msurface_t *out, *oldout;
5781         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;
5782         float lightmaptcbase[2], lightmaptcscale[2];
5783         //int *originalelement3i;
5784         float *originalvertex3f;
5785         //float *originalsvector3f;
5786         //float *originaltvector3f;
5787         float *originalnormal3f;
5788         float *originalcolor4f;
5789         float *originaltexcoordtexture2f;
5790         float *originaltexcoordlightmap2f;
5791         float *surfacecollisionvertex3f;
5792         int *surfacecollisionelement3i;
5793         float *v;
5794         patchtess_t *patchtess = NULL;
5795         int patchtesscount = 0;
5796         qbool again;
5797
5798         in = (q3dface_t *)(mod_base + l->fileofs);
5799         if (l->filelen % sizeof(*in))
5800                 Host_Error("Mod_Q3BSP_LoadFaces: funny lump size in %s",loadmodel->name);
5801         count = l->filelen / sizeof(*in);
5802         out = (msurface_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
5803
5804         loadmodel->data_surfaces = out;
5805         loadmodel->num_surfaces = count;
5806
5807         if(count > 0)
5808                 patchtess = (patchtess_t*) Mem_Alloc(tempmempool, count * sizeof(*patchtess));
5809
5810         i = 0;
5811         oldi = i;
5812         oldin = in;
5813         oldout = out;
5814         meshvertices = 0;
5815         meshtriangles = 0;
5816         for (;i < count;i++, in++, out++)
5817         {
5818                 // check face type first
5819                 type = LittleLong(in->type);
5820                 if (type != Q3FACETYPE_FLAT
5821                  && type != Q3FACETYPE_PATCH
5822                  && type != Q3FACETYPE_MESH
5823                  && type != Q3FACETYPE_FLARE)
5824                 {
5825                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: unknown face type %i\n", i, type);
5826                         continue;
5827                 }
5828
5829                 n = LittleLong(in->textureindex);
5830                 if (n < 0 || n >= loadmodel->num_textures)
5831                 {
5832                         Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i: invalid textureindex %i (%i textures)\n", i, n, loadmodel->num_textures);
5833                         continue;
5834                 }
5835                 out->texture = loadmodel->data_textures + n;
5836                 n = LittleLong(in->effectindex);
5837                 if (n < -1 || n >= loadmodel->brushq3.num_effects)
5838                 {
5839                         if (developer_extra.integer)
5840                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid effectindex %i (%i effects)\n", i, out->texture->name, n, loadmodel->brushq3.num_effects);
5841                         n = -1;
5842                 }
5843                 if (n == -1)
5844                         out->effect = NULL;
5845                 else
5846                         out->effect = loadmodel->brushq3.data_effects + n;
5847
5848                 if (cls.state != ca_dedicated)
5849                 {
5850                         out->lightmaptexture = NULL;
5851                         out->deluxemaptexture = r_texture_blanknormalmap;
5852                         n = LittleLong(in->lightmapindex);
5853                         if (n < 0)
5854                                 n = -1;
5855                         else if (n >= loadmodel->brushq3.num_originallightmaps)
5856                         {
5857                                 if(loadmodel->brushq3.num_originallightmaps != 0)
5858                                         Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
5859                                 n = -1;
5860                         }
5861                         else
5862                         {
5863                                 out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5864                                 if (loadmodel->brushq3.deluxemapping)
5865                                         out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
5866                                 loadmodel->lit = true;
5867                         }
5868                 }
5869
5870                 firstvertex = LittleLong(in->firstvertex);
5871                 numvertices = LittleLong(in->numvertices);
5872                 firstelement = LittleLong(in->firstelement);
5873                 numtriangles = LittleLong(in->numelements) / 3;
5874                 if (numtriangles * 3 != LittleLong(in->numelements))
5875                 {
5876                         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));
5877                         continue;
5878                 }
5879                 if (firstvertex < 0 || firstvertex + numvertices > loadmodel->brushq3.num_vertices)
5880                 {
5881                         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);
5882                         continue;
5883                 }
5884                 if (firstelement < 0 || firstelement + numtriangles * 3 > loadmodel->brushq3.num_triangles * 3)
5885                 {
5886                         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);
5887                         continue;
5888                 }
5889                 switch(type)
5890                 {
5891                 case Q3FACETYPE_FLAT:
5892                 case Q3FACETYPE_MESH:
5893                         // no processing necessary
5894                         break;
5895                 case Q3FACETYPE_PATCH:
5896                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
5897                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
5898                         if (numvertices != (patchsize[0] * patchsize[1]) || patchsize[0] < 3 || patchsize[1] < 3 || !(patchsize[0] & 1) || !(patchsize[1] & 1) || patchsize[0] * patchsize[1] >= min(r_subdivisions_maxvertices.integer, r_subdivisions_collision_maxvertices.integer))
5899                         {
5900                                 Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid patchsize %ix%i\n", i, out->texture->name, patchsize[0], patchsize[1]);
5901                                 continue;
5902                         }
5903                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
5904
5905                         // convert patch to Q3FACETYPE_MESH
5906                         xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5907                         ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
5908                         // bound to user settings
5909                         xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
5910                         ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
5911                         // bound to sanity settings
5912                         xtess = bound(0, xtess, 1024);
5913                         ytess = bound(0, ytess, 1024);
5914
5915                         // lower quality collision patches! Same procedure as before, but different cvars
5916                         // convert patch to Q3FACETYPE_MESH
5917                         cxtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
5918                         cytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
5919                         // bound to user settings
5920                         cxtess = bound(r_subdivisions_collision_mintess.integer, cxtess, r_subdivisions_collision_maxtess.integer);
5921                         cytess = bound(r_subdivisions_collision_mintess.integer, cytess, r_subdivisions_collision_maxtess.integer);
5922                         // bound to sanity settings
5923                         cxtess = bound(0, cxtess, 1024);
5924                         cytess = bound(0, cytess, 1024);
5925
5926                         // store it for the LOD grouping step
5927                         patchtess[patchtesscount].info.xsize = patchsize[0];
5928                         patchtess[patchtesscount].info.ysize = patchsize[1];
5929                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].xtess = xtess;
5930                         patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].ytess = ytess;
5931                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].xtess = cxtess;
5932                         patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].ytess = cytess;
5933
5934                         patchtess[patchtesscount].surface_id = i;
5935                         patchtess[patchtesscount].lodgroup[0] = LittleFloat(in->specific.patch.mins[0]);
5936                         patchtess[patchtesscount].lodgroup[1] = LittleFloat(in->specific.patch.mins[1]);
5937                         patchtess[patchtesscount].lodgroup[2] = LittleFloat(in->specific.patch.mins[2]);
5938                         patchtess[patchtesscount].lodgroup[3] = LittleFloat(in->specific.patch.maxs[0]);
5939                         patchtess[patchtesscount].lodgroup[4] = LittleFloat(in->specific.patch.maxs[1]);
5940                         patchtess[patchtesscount].lodgroup[5] = LittleFloat(in->specific.patch.maxs[2]);
5941                         patchtess[patchtesscount].originalvertex3f = originalvertex3f;
5942                         ++patchtesscount;
5943                         break;
5944                 case Q3FACETYPE_FLARE:
5945                         if (developer_extra.integer)
5946                                 Con_DPrintf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): Q3FACETYPE_FLARE not supported (yet)\n", i, out->texture->name);
5947                         // don't render it
5948                         continue;
5949                 }
5950                 out->num_vertices = numvertices;
5951                 out->num_triangles = numtriangles;
5952                 meshvertices += out->num_vertices;
5953                 meshtriangles += out->num_triangles;
5954         }
5955
5956         // Fix patches tesselations so that they make no seams
5957         do
5958         {
5959                 again = false;
5960                 for(i = 0; i < patchtesscount; ++i)
5961                 {
5962                         for(j = i+1; j < patchtesscount; ++j)
5963                         {
5964                                 if (!PATCHTESS_SAME_LODGROUP(patchtess[i], patchtess[j]))
5965                                         continue;
5966
5967                                 if (Q3PatchAdjustTesselation(3, &patchtess[i].info, patchtess[i].originalvertex3f, &patchtess[j].info, patchtess[j].originalvertex3f) )
5968                                         again = true;
5969                         }
5970                 }
5971         }
5972         while (again);
5973
5974         // Calculate resulting number of triangles
5975         collisionvertices = 0;
5976         collisiontriangles = 0;
5977         for(i = 0; i < patchtesscount; ++i)
5978         {
5979                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
5980                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_VISUAL].ytess);
5981                 numvertices = finalwidth * finalheight;
5982                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
5983
5984                 oldout[patchtess[i].surface_id].num_vertices = numvertices;
5985                 oldout[patchtess[i].surface_id].num_triangles = numtriangles;
5986                 meshvertices += oldout[patchtess[i].surface_id].num_vertices;
5987                 meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
5988
5989                 finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_COLLISION].xtess);
5990                 finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_COLLISION].ytess);
5991                 numvertices = finalwidth * finalheight;
5992                 numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
5993
5994                 oldout[patchtess[i].surface_id].num_collisionvertices = numvertices;
5995                 oldout[patchtess[i].surface_id].num_collisiontriangles = numtriangles;
5996                 collisionvertices += oldout[patchtess[i].surface_id].num_collisionvertices;
5997                 collisiontriangles += oldout[patchtess[i].surface_id].num_collisiontriangles;
5998         }
5999
6000         i = oldi;
6001         in = oldin;
6002         out = oldout;
6003         Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true);
6004         if (collisiontriangles)
6005         {
6006                 loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
6007                 loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
6008         }
6009         meshvertices = 0;
6010         meshtriangles = 0;
6011         collisionvertices = 0;
6012         collisiontriangles = 0;
6013         for (;i < count && meshvertices + out->num_vertices <= loadmodel->surfmesh.num_vertices;i++, in++, out++)
6014         {
6015                 if (out->num_vertices < 3 || out->num_triangles < 1)
6016                         continue;
6017
6018                 type = LittleLong(in->type);
6019                 firstvertex = LittleLong(in->firstvertex);
6020                 firstelement = LittleLong(in->firstelement);
6021                 out->num_firstvertex = meshvertices;
6022                 out->num_firsttriangle = meshtriangles;
6023                 out->num_firstcollisiontriangle = collisiontriangles;
6024                 switch(type)
6025                 {
6026                 case Q3FACETYPE_FLAT:
6027                 case Q3FACETYPE_MESH:
6028                         // no processing necessary, except for lightmap merging
6029                         for (j = 0;j < out->num_vertices;j++)
6030                         {
6031                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 0];
6032                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 1];
6033                                 (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_vertex3f[(firstvertex + j) * 3 + 2];
6034                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 0] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 0];
6035                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 1] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 1];
6036                                 (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex)[j * 3 + 2] = loadmodel->brushq3.data_normal3f[(firstvertex + j) * 3 + 2];
6037                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 0];
6038                                 (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordtexture2f[(firstvertex + j) * 2 + 1];
6039                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 0] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 0];
6040                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex)[j * 2 + 1] = loadmodel->brushq3.data_texcoordlightmap2f[(firstvertex + j) * 2 + 1];
6041                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 0] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 0];
6042                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 1] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 1];
6043                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 2] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 2];
6044                                 (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex)[j * 4 + 3] = loadmodel->brushq3.data_color4f[(firstvertex + j) * 4 + 3];
6045                         }
6046                         for (j = 0;j < out->num_triangles*3;j++)
6047                                 (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = loadmodel->brushq3.data_element3i[firstelement + j] + out->num_firstvertex;
6048                         break;
6049                 case Q3FACETYPE_PATCH:
6050                         patchsize[0] = LittleLong(in->specific.patch.patchsize[0]);
6051                         patchsize[1] = LittleLong(in->specific.patch.patchsize[1]);
6052                         originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
6053                         originalnormal3f = loadmodel->brushq3.data_normal3f + firstvertex * 3;
6054                         originaltexcoordtexture2f = loadmodel->brushq3.data_texcoordtexture2f + firstvertex * 2;
6055                         originaltexcoordlightmap2f = loadmodel->brushq3.data_texcoordlightmap2f + firstvertex * 2;
6056                         originalcolor4f = loadmodel->brushq3.data_color4f + firstvertex * 4;
6057
6058                         xtess = ytess = cxtess = cytess = -1;
6059                         for(j = 0; j < patchtesscount; ++j)
6060                                 if(patchtess[j].surface_id == i)
6061                                 {
6062                                         xtess = patchtess[j].info.lods[PATCH_LOD_VISUAL].xtess;
6063                                         ytess = patchtess[j].info.lods[PATCH_LOD_VISUAL].ytess;
6064                                         cxtess = patchtess[j].info.lods[PATCH_LOD_COLLISION].xtess;
6065                                         cytess = patchtess[j].info.lods[PATCH_LOD_COLLISION].ytess;
6066                                         break;
6067                                 }
6068                         if(xtess == -1)
6069                         {
6070                                 Con_Printf(CON_ERROR "ERROR: patch %d isn't preprocessed?!?\n", i);
6071                                 xtess = ytess = cxtess = cytess = 0;
6072                         }
6073
6074                         finalwidth = Q3PatchDimForTess(patchsize[0],xtess); //((patchsize[0] - 1) * xtess) + 1;
6075                         finalheight = Q3PatchDimForTess(patchsize[1],ytess); //((patchsize[1] - 1) * ytess) + 1;
6076                         finalvertices = finalwidth * finalheight;
6077                         oldnumtriangles = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6078                         type = Q3FACETYPE_MESH;
6079                         // generate geometry
6080                         // (note: normals are skipped because they get recalculated)
6081                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, xtess, ytess);
6082                         Q3PatchTesselateFloat(3, sizeof(float[3]), (loadmodel->surfmesh.data_normal3f + 3 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[3]), originalnormal3f, xtess, ytess);
6083                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordtexture2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordtexture2f, xtess, ytess);
6084                         Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordlightmap2f, xtess, ytess);
6085                         Q3PatchTesselateFloat(4, sizeof(float[4]), (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[4]), originalcolor4f, xtess, ytess);
6086                         Q3PatchTriangleElements((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), finalwidth, finalheight, out->num_firstvertex);
6087
6088                         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);
6089
6090                         if (developer_extra.integer)
6091                         {
6092                                 if (out->num_triangles < finaltriangles)
6093                                         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);
6094                                 else
6095                                         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);
6096                         }
6097                         // q3map does not put in collision brushes for curves... ugh
6098                         // build the lower quality collision geometry
6099                         finalwidth = Q3PatchDimForTess(patchsize[0],cxtess); //((patchsize[0] - 1) * cxtess) + 1;
6100                         finalheight = Q3PatchDimForTess(patchsize[1],cytess); //((patchsize[1] - 1) * cytess) + 1;
6101                         finalvertices = finalwidth * finalheight;
6102                         oldnumtriangles2 = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
6103
6104                         // store collision geometry for BIH collision tree
6105                         out->num_collisionvertices = finalvertices;
6106                         out->num_collisiontriangles = finaltriangles;
6107                         surfacecollisionvertex3f = loadmodel->brush.data_collisionvertex3f + collisionvertices * 3;
6108                         surfacecollisionelement3i = loadmodel->brush.data_collisionelement3i + collisiontriangles * 3;
6109                         Q3PatchTesselateFloat(3, sizeof(float[3]), surfacecollisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
6110                         Q3PatchTriangleElements(surfacecollisionelement3i, finalwidth, finalheight, collisionvertices);
6111                         Mod_SnapVertices(3, finalvertices, surfacecollisionvertex3f, 1);
6112                         out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, surfacecollisionelement3i, surfacecollisionelement3i, loadmodel->brush.data_collisionvertex3f);
6113
6114                         if (developer_extra.integer)
6115                                 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);
6116
6117                         collisionvertices += finalvertices;
6118                         collisiontriangles += out->num_collisiontriangles;
6119                         break;
6120                 default:
6121                         break;
6122                 }
6123                 meshvertices += out->num_vertices;
6124                 meshtriangles += out->num_triangles;
6125                 for (j = 0, invalidelements = 0;j < out->num_triangles * 3;j++)
6126                         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)
6127                                 invalidelements++;
6128                 if (invalidelements)
6129                 {
6130                         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);
6131                         for (j = 0;j < out->num_triangles * 3;j++)
6132                         {
6133                                 Con_Printf(" %i", (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] - out->num_firstvertex);
6134                                 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)
6135                                         (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle)[j] = out->num_firstvertex;
6136                         }
6137                         Con_Print("\n");
6138                 }
6139                 // calculate a bounding box
6140                 VectorClear(out->mins);
6141                 VectorClear(out->maxs);
6142                 if (out->num_vertices)
6143                 {
6144                         if (cls.state != ca_dedicated && out->lightmaptexture)
6145                         {
6146                                 // figure out which part of the merged lightmap this fits into
6147                                 int lightmapindex = LittleLong(in->lightmapindex) >> (loadmodel->brushq3.deluxemapping ? 1 : 0);
6148                                 int mergewidth = R_TextureWidth(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6149                                 int mergeheight = R_TextureHeight(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
6150                                 lightmapindex &= mergewidth * mergeheight - 1;
6151                                 lightmaptcscale[0] = 1.0f / mergewidth;
6152                                 lightmaptcscale[1] = 1.0f / mergeheight;
6153                                 lightmaptcbase[0] = (lightmapindex % mergewidth) * lightmaptcscale[0];
6154                                 lightmaptcbase[1] = (lightmapindex / mergewidth) * lightmaptcscale[1];
6155                                 // modify the lightmap texcoords to match this region of the merged lightmap
6156                                 for (j = 0, v = loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex;j < out->num_vertices;j++, v += 2)
6157                                 {
6158                                         v[0] = v[0] * lightmaptcscale[0] + lightmaptcbase[0];
6159                                         v[1] = v[1] * lightmaptcscale[1] + lightmaptcbase[1];
6160                                 }
6161                         }
6162                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->mins);
6163                         VectorCopy((loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), out->maxs);
6164                         for (j = 1, v = (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex) + 3;j < out->num_vertices;j++, v += 3)
6165                         {
6166                                 out->mins[0] = min(out->mins[0], v[0]);
6167                                 out->maxs[0] = max(out->maxs[0], v[0]);
6168                                 out->mins[1] = min(out->mins[1], v[1]);
6169                                 out->maxs[1] = max(out->maxs[1], v[1]);
6170                                 out->mins[2] = min(out->mins[2], v[2]);
6171                                 out->maxs[2] = max(out->maxs[2], v[2]);
6172                         }
6173                         out->mins[0] -= 1.0f;
6174                         out->mins[1] -= 1.0f;
6175                         out->mins[2] -= 1.0f;
6176                         out->maxs[0] += 1.0f;
6177                         out->maxs[1] += 1.0f;
6178                         out->maxs[2] += 1.0f;
6179                 }
6180                 // set lightmap styles for consistency with q1bsp
6181                 //out->lightmapinfo->styles[0] = 0;
6182                 //out->lightmapinfo->styles[1] = 255;
6183                 //out->lightmapinfo->styles[2] = 255;
6184                 //out->lightmapinfo->styles[3] = 255;
6185         }
6186
6187         i = oldi;
6188         out = oldout;
6189         for (;i < count;i++, out++)
6190         {
6191                 if(out->num_vertices && out->num_triangles)
6192                         continue;
6193                 if(out->num_vertices == 0)
6194                 {
6195                         Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6196                         if(out->num_triangles == 0)
6197                                 Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
6198                 }
6199                 else if(out->num_triangles == 0)
6200                         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)",
6201                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
6202                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
6203                                         (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
6204         }
6205
6206         // for per pixel lighting
6207         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);
6208
6209         // generate ushort elements array if possible
6210         if (loadmodel->surfmesh.data_element3s)
6211                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
6212                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
6213
6214         // free the no longer needed vertex data
6215         loadmodel->brushq3.num_vertices = 0;
6216         if (loadmodel->brushq3.data_vertex3f)
6217                 Mem_Free(loadmodel->brushq3.data_vertex3f);
6218         loadmodel->brushq3.data_vertex3f = NULL;
6219         loadmodel->brushq3.data_normal3f = NULL;
6220         loadmodel->brushq3.data_texcoordtexture2f = NULL;
6221         loadmodel->brushq3.data_texcoordlightmap2f = NULL;
6222         loadmodel->brushq3.data_color4f = NULL;
6223         // free the no longer needed triangle data
6224         loadmodel->brushq3.num_triangles = 0;
6225         if (loadmodel->brushq3.data_element3i)
6226                 Mem_Free(loadmodel->brushq3.data_element3i);
6227         loadmodel->brushq3.data_element3i = NULL;
6228
6229         if(patchtess)
6230                 Mem_Free(patchtess);
6231 }
6232
6233 static void Mod_Q3BSP_LoadModels(lump_t *l)
6234 {
6235         q3dmodel_t *in;
6236         q3dmodel_t *out;
6237         int i, j, n, c, count;
6238
6239         in = (q3dmodel_t *)(mod_base + l->fileofs);
6240         if (l->filelen % sizeof(*in))
6241                 Host_Error("Mod_Q3BSP_LoadModels: funny lump size in %s",loadmodel->name);
6242         count = l->filelen / sizeof(*in);
6243         out = (q3dmodel_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6244
6245         loadmodel->brushq3.data_models = out;
6246         loadmodel->brushq3.num_models = count;
6247
6248         for (i = 0;i < count;i++, in++, out++)
6249         {
6250                 for (j = 0;j < 3;j++)
6251                 {
6252                         out->mins[j] = LittleFloat(in->mins[j]);
6253                         out->maxs[j] = LittleFloat(in->maxs[j]);
6254                 }
6255                 n = LittleLong(in->firstface);
6256                 c = LittleLong(in->numfaces);
6257                 if (n < 0 || n + c > loadmodel->num_surfaces)
6258                         Host_Error("Mod_Q3BSP_LoadModels: invalid face range %i : %i (%i faces)", n, n + c, loadmodel->num_surfaces);
6259                 out->firstface = n;
6260                 out->numfaces = c;
6261                 n = LittleLong(in->firstbrush);
6262                 c = LittleLong(in->numbrushes);
6263                 if (n < 0 || n + c > loadmodel->brush.num_brushes)
6264                         Host_Error("Mod_Q3BSP_LoadModels: invalid brush range %i : %i (%i brushes)", n, n + c, loadmodel->brush.num_brushes);
6265                 out->firstbrush = n;
6266                 out->numbrushes = c;
6267         }
6268 }
6269
6270 static void Mod_Q3BSP_LoadLeafBrushes(lump_t *l)
6271 {
6272         int *in;
6273         int *out;
6274         int i, n, count;
6275
6276         in = (int *)(mod_base + l->fileofs);
6277         if (l->filelen % sizeof(*in))
6278                 Host_Error("Mod_Q3BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
6279         count = l->filelen / sizeof(*in);
6280         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6281
6282         loadmodel->brush.data_leafbrushes = out;
6283         loadmodel->brush.num_leafbrushes = count;
6284
6285         for (i = 0;i < count;i++, in++, out++)
6286         {
6287                 n = LittleLong(*in);
6288                 if (n < 0 || n >= loadmodel->brush.num_brushes)
6289                         Host_Error("Mod_Q3BSP_LoadLeafBrushes: invalid brush index %i (%i brushes)", n, loadmodel->brush.num_brushes);
6290                 *out = n;
6291         }
6292 }
6293
6294 static void Mod_Q3BSP_LoadLeafFaces(lump_t *l)
6295 {
6296         int *in;
6297         int *out;
6298         int i, n, count;
6299
6300         in = (int *)(mod_base + l->fileofs);
6301         if (l->filelen % sizeof(*in))
6302                 Host_Error("Mod_Q3BSP_LoadLeafFaces: funny lump size in %s",loadmodel->name);
6303         count = l->filelen / sizeof(*in);
6304         out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6305
6306         loadmodel->brush.data_leafsurfaces = out;
6307         loadmodel->brush.num_leafsurfaces = count;
6308
6309         for (i = 0;i < count;i++, in++, out++)
6310         {
6311                 n = LittleLong(*in);
6312                 if (n < 0 || n >= loadmodel->num_surfaces)
6313                         Host_Error("Mod_Q3BSP_LoadLeafFaces: invalid face index %i (%i faces)", n, loadmodel->num_surfaces);
6314                 *out = n;
6315         }
6316 }
6317
6318 static void Mod_Q3BSP_LoadLeafs(lump_t *l)
6319 {
6320         q3dleaf_t *in;
6321         mleaf_t *out;
6322         int i, j, n, c, count;
6323
6324         in = (q3dleaf_t *)(mod_base + l->fileofs);
6325         if (l->filelen % sizeof(*in))
6326                 Host_Error("Mod_Q3BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
6327         count = l->filelen / sizeof(*in);
6328         out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6329
6330         loadmodel->brush.data_leafs = out;
6331         loadmodel->brush.num_leafs = count;
6332
6333         for (i = 0;i < count;i++, in++, out++)
6334         {
6335                 out->parent = NULL;
6336                 out->plane = NULL;
6337                 out->clusterindex = LittleLong(in->clusterindex);
6338                 out->areaindex = LittleLong(in->areaindex);
6339                 for (j = 0;j < 3;j++)
6340                 {
6341                         // yes the mins/maxs are ints
6342                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6343                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6344                 }
6345                 n = LittleLong(in->firstleafface);
6346                 c = LittleLong(in->numleaffaces);
6347                 if (n < 0 || n + c > loadmodel->brush.num_leafsurfaces)
6348                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafsurface range %i : %i (%i leafsurfaces)", n, n + c, loadmodel->brush.num_leafsurfaces);
6349                 out->firstleafsurface = loadmodel->brush.data_leafsurfaces + n;
6350                 out->numleafsurfaces = c;
6351                 n = LittleLong(in->firstleafbrush);
6352                 c = LittleLong(in->numleafbrushes);
6353                 if (n < 0 || n + c > loadmodel->brush.num_leafbrushes)
6354                         Host_Error("Mod_Q3BSP_LoadLeafs: invalid leafbrush range %i : %i (%i leafbrushes)", n, n + c, loadmodel->brush.num_leafbrushes);
6355                 out->firstleafbrush = loadmodel->brush.data_leafbrushes + n;
6356                 out->numleafbrushes = c;
6357         }
6358 }
6359
6360 static void Mod_Q3BSP_LoadNodes(lump_t *l)
6361 {
6362         q3dnode_t *in;
6363         mnode_t *out;
6364         int i, j, n, count;
6365
6366         in = (q3dnode_t *)(mod_base + l->fileofs);
6367         if (l->filelen % sizeof(*in))
6368                 Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
6369         count = l->filelen / sizeof(*in);
6370         if (count == 0)
6371                 Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
6372         out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6373
6374         loadmodel->brush.data_nodes = out;
6375         loadmodel->brush.num_nodes = count;
6376
6377         for (i = 0;i < count;i++, in++, out++)
6378         {
6379                 out->parent = NULL;
6380                 n = LittleLong(in->planeindex);
6381                 if (n < 0 || n >= loadmodel->brush.num_planes)
6382                         Host_Error("Mod_Q3BSP_LoadNodes: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
6383                 out->plane = loadmodel->brush.data_planes + n;
6384                 for (j = 0;j < 2;j++)
6385                 {
6386                         n = LittleLong(in->childrenindex[j]);
6387                         if (n >= 0)
6388                         {
6389                                 if (n >= loadmodel->brush.num_nodes)
6390                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child node index %i (%i nodes)", n, loadmodel->brush.num_nodes);
6391                                 out->children[j] = loadmodel->brush.data_nodes + n;
6392                         }
6393                         else
6394                         {
6395                                 n = -1 - n;
6396                                 if (n >= loadmodel->brush.num_leafs)
6397                                         Host_Error("Mod_Q3BSP_LoadNodes: invalid child leaf index %i (%i leafs)", n, loadmodel->brush.num_leafs);
6398                                 out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + n);
6399                         }
6400                 }
6401                 for (j = 0;j < 3;j++)
6402                 {
6403                         // yes the mins/maxs are ints
6404                         out->mins[j] = LittleLong(in->mins[j]) - 1;
6405                         out->maxs[j] = LittleLong(in->maxs[j]) + 1;
6406                 }
6407         }
6408
6409         // set the parent pointers
6410         Mod_BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);
6411 }
6412
6413 static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
6414 {
6415         q3dlightgrid_t *in;
6416         q3dlightgrid_t *out;
6417         int count;
6418         int i;
6419         int texturesize[3];
6420         unsigned char *texturergba, *texturelayer[3], *texturepadding[2];
6421         double lightgridmatrix[4][4];
6422
6423         in = (q3dlightgrid_t *)(mod_base + l->fileofs);
6424         if (l->filelen % sizeof(*in))
6425                 Host_Error("Mod_Q3BSP_LoadLightGrid: funny lump size in %s",loadmodel->name);
6426         loadmodel->brushq3.num_lightgrid_scale[0] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[0];
6427         loadmodel->brushq3.num_lightgrid_scale[1] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[1];
6428         loadmodel->brushq3.num_lightgrid_scale[2] = 1.0f / loadmodel->brushq3.num_lightgrid_cellsize[2];
6429         loadmodel->brushq3.num_lightgrid_imins[0] = (int)ceil(loadmodel->brushq3.data_models->mins[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6430         loadmodel->brushq3.num_lightgrid_imins[1] = (int)ceil(loadmodel->brushq3.data_models->mins[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6431         loadmodel->brushq3.num_lightgrid_imins[2] = (int)ceil(loadmodel->brushq3.data_models->mins[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6432         loadmodel->brushq3.num_lightgrid_imaxs[0] = (int)floor(loadmodel->brushq3.data_models->maxs[0] * loadmodel->brushq3.num_lightgrid_scale[0]);
6433         loadmodel->brushq3.num_lightgrid_imaxs[1] = (int)floor(loadmodel->brushq3.data_models->maxs[1] * loadmodel->brushq3.num_lightgrid_scale[1]);
6434         loadmodel->brushq3.num_lightgrid_imaxs[2] = (int)floor(loadmodel->brushq3.data_models->maxs[2] * loadmodel->brushq3.num_lightgrid_scale[2]);
6435         loadmodel->brushq3.num_lightgrid_isize[0] = loadmodel->brushq3.num_lightgrid_imaxs[0] - loadmodel->brushq3.num_lightgrid_imins[0] + 1;
6436         loadmodel->brushq3.num_lightgrid_isize[1] = loadmodel->brushq3.num_lightgrid_imaxs[1] - loadmodel->brushq3.num_lightgrid_imins[1] + 1;
6437         loadmodel->brushq3.num_lightgrid_isize[2] = loadmodel->brushq3.num_lightgrid_imaxs[2] - loadmodel->brushq3.num_lightgrid_imins[2] + 1;
6438         count = loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2];
6439         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]);
6440         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]);
6441
6442         // if lump is empty there is nothing to load, we can deal with that in the LightPoint code
6443         if (l->filelen)
6444         {
6445                 if (l->filelen < count * (int)sizeof(*in))
6446                 {
6447                         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]);
6448                         return; // ignore the grid if we cannot understand it
6449                 }
6450                 if (l->filelen != count * (int)sizeof(*in))
6451                         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);
6452                 out = (q3dlightgrid_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
6453                 loadmodel->brushq3.data_lightgrid = out;
6454                 loadmodel->brushq3.num_lightgrid = count;
6455                 // no swapping or validation necessary
6456                 memcpy(out, in, count * (int)sizeof(*out));
6457
6458                 if(mod_q3bsp_sRGBlightmaps.integer)
6459                 {
6460                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6461                         {
6462                                 // we fix the brightness consistently via lightmapscale
6463                         }
6464                         else
6465                         {
6466                                 for(i = 0; i < count; ++i)
6467                                 {
6468                                         out[i].ambientrgb[0] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6469                                         out[i].ambientrgb[1] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6470                                         out[i].ambientrgb[2] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6471                                         out[i].diffusergb[0] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[0]) * 255.0f + 0.5f);
6472                                         out[i].diffusergb[1] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[1]) * 255.0f + 0.5f);
6473                                         out[i].diffusergb[2] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[2]) * 255.0f + 0.5f);
6474                                 }
6475                         }
6476                 }
6477                 else
6478                 {
6479                         if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
6480                         {
6481                                 for(i = 0; i < count; ++i)
6482                                 {
6483                                         out[i].ambientrgb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[0]) * 255.0f + 0.5f);
6484                                         out[i].ambientrgb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[1]) * 255.0f + 0.5f);
6485                                         out[i].ambientrgb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[2]) * 255.0f + 0.5f);
6486                                         out[i].diffusergb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[0]) * 255.0f + 0.5f);
6487                                         out[i].diffusergb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[1]) * 255.0f + 0.5f);
6488                                         out[i].diffusergb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[2]) * 255.0f + 0.5f);
6489                                 }
6490                         }
6491                         else
6492                         {
6493                                 // all is good
6494                         }
6495                 }
6496
6497                 if (mod_q3bsp_lightgrid_texture.integer)
6498                 {
6499                         // build a texture to hold the data for per-pixel sampling
6500                         // this has 3 different kinds of data stacked in it:
6501                         // ambient color
6502                         // bent-normal light color
6503                         // bent-normal light dir
6504
6505                         texturesize[0] = loadmodel->brushq3.num_lightgrid_isize[0];
6506                         texturesize[1] = loadmodel->brushq3.num_lightgrid_isize[1];
6507                         texturesize[2] = (loadmodel->brushq3.num_lightgrid_isize[2] + 2) * 3;
6508                         texturergba = (unsigned char*)Mem_Alloc(loadmodel->mempool, texturesize[0] * texturesize[1] * texturesize[2] * sizeof(char[4]));
6509                         texturelayer[0] = texturergba + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6510                         texturelayer[1] = texturelayer[0] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6511                         texturelayer[2] = texturelayer[1] + (loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * (loadmodel->brushq3.num_lightgrid_isize[2] + 2)) * 4;
6512                         // the light dir layer needs padding above/below it that is a neutral unsigned normal (127,127,127,255)
6513                         texturepadding[0] = texturelayer[2] - loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * 4;
6514                         texturepadding[1] = texturelayer[2] + loadmodel->brushq3.num_lightgrid_isize[0] * loadmodel->brushq3.num_lightgrid_isize[1] * loadmodel->brushq3.num_lightgrid_isize[2] * 4;
6515                         for (i = 0; i < texturesize[0] * texturesize[1]; i++)
6516                         {
6517                                 texturepadding[0][i * 4] = texturepadding[1][i * 4] = 127;
6518                                 texturepadding[0][i * 4 + 1] = texturepadding[1][i * 4 + 1] = 127;
6519                                 texturepadding[0][i * 4 + 2] = texturepadding[1][i * 4 + 2] = 127;
6520                                 texturepadding[0][i * 4 + 3] = texturepadding[1][i * 4 + 3] = 255;
6521                         }
6522                         for (i = 0; i < count; i++)
6523                         {
6524                                 texturelayer[0][i * 4 + 0] = out[i].ambientrgb[0];
6525                                 texturelayer[0][i * 4 + 1] = out[i].ambientrgb[1];
6526                                 texturelayer[0][i * 4 + 2] = out[i].ambientrgb[2];
6527                                 texturelayer[0][i * 4 + 3] = 255;
6528                                 texturelayer[1][i * 4 + 0] = out[i].diffusergb[0];
6529                                 texturelayer[1][i * 4 + 1] = out[i].diffusergb[1];
6530                                 texturelayer[1][i * 4 + 2] = out[i].diffusergb[2];
6531                                 texturelayer[1][i * 4 + 3] = 255;
6532                                 // this uses the mod_md3_sin table because the values are
6533                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6534                                 // instead of a sine value
6535                                 texturelayer[2][i * 4 + 0] = (char)((mod_md3_sin[64 + out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6536                                 texturelayer[2][i * 4 + 1] = (char)((mod_md3_sin[out[i].diffuseyaw] * mod_md3_sin[out[i].diffusepitch]) * 127 + 127);
6537                                 texturelayer[2][i * 4 + 2] = (char)((mod_md3_sin[64 + out[i].diffusepitch]) * 127 + 127);
6538                                 texturelayer[2][i * 4 + 3] = 255;
6539                         }
6540 #if 0
6541                         // debugging hack
6542                         int x, y, z;
6543                         for (z = 0; z < loadmodel->brushq3.num_lightgrid_isize[2]; z++)
6544                         {
6545                                 for (y = 0; y < loadmodel->brushq3.num_lightgrid_isize[1]; y++)
6546                                 {
6547                                         for (x = 0; x < loadmodel->brushq3.num_lightgrid_isize[0]; x++)
6548                                         {
6549                                                 i = (z * texturesize[1] + y) * texturesize[0] + x;
6550                                                 texturelayer[0][i * 4 + 0] = x * 256 / loadmodel->brushq3.num_lightgrid_isize[0];
6551                                                 texturelayer[0][i * 4 + 1] = y * 256 / loadmodel->brushq3.num_lightgrid_isize[1];
6552                                                 texturelayer[0][i * 4 + 2] = z * 256 / loadmodel->brushq3.num_lightgrid_isize[2];
6553                                         }
6554                                 }
6555                         }
6556 #endif
6557                         loadmodel->brushq3.lightgridtexturesize[0] = texturesize[0];
6558                         loadmodel->brushq3.lightgridtexturesize[1] = texturesize[1];
6559                         loadmodel->brushq3.lightgridtexturesize[2] = texturesize[2];
6560                         memset(lightgridmatrix[0], 0, sizeof(lightgridmatrix));
6561                         lightgridmatrix[0][0] = loadmodel->brushq3.num_lightgrid_scale[0] / texturesize[0];
6562                         lightgridmatrix[1][1] = loadmodel->brushq3.num_lightgrid_scale[1] / texturesize[1];
6563                         lightgridmatrix[2][2] = loadmodel->brushq3.num_lightgrid_scale[2] / texturesize[2];
6564                         lightgridmatrix[0][3] = -(loadmodel->brushq3.num_lightgrid_imins[0] - 0.5f) / texturesize[0];
6565                         lightgridmatrix[1][3] = -(loadmodel->brushq3.num_lightgrid_imins[1] - 0.5f) / texturesize[1];
6566                         lightgridmatrix[2][3] = -(loadmodel->brushq3.num_lightgrid_imins[2] - 1.5f) / texturesize[2];
6567                         lightgridmatrix[3][3] = 1;
6568                         Matrix4x4_FromArrayDoubleD3D(&loadmodel->brushq3.lightgridworldtotexturematrix, lightgridmatrix);
6569                         loadmodel->brushq3.lightgridtexture = R_LoadTexture3D(loadmodel->texturepool, "lightgrid", texturesize[0], texturesize[1], texturesize[2], texturergba, TEXTYPE_RGBA, TEXF_CLAMP, 0, NULL);
6570                         Mem_Free(texturergba);
6571                 }
6572         }
6573 }
6574
6575 static void Mod_Q3BSP_LoadPVS(lump_t *l)
6576 {
6577         q3dpvs_t *in;
6578         int totalchains;
6579
6580         if (l->filelen == 0)
6581         {
6582                 int i;
6583                 // unvised maps often have cluster indices even without pvs, so check
6584                 // leafs to find real number of clusters
6585                 loadmodel->brush.num_pvsclusters = 1;
6586                 for (i = 0;i < loadmodel->brush.num_leafs;i++)
6587                         loadmodel->brush.num_pvsclusters = max(loadmodel->brush.num_pvsclusters, loadmodel->brush.data_leafs[i].clusterindex + 1);
6588
6589                 // create clusters
6590                 loadmodel->brush.num_pvsclusterbytes = (loadmodel->brush.num_pvsclusters + 7) / 8;
6591                 totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6592                 loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6593                 memset(loadmodel->brush.data_pvsclusters, 0xFF, totalchains);
6594                 return;
6595         }
6596
6597         in = (q3dpvs_t *)(mod_base + l->fileofs);
6598         if (l->filelen < 9)
6599                 Host_Error("Mod_Q3BSP_LoadPVS: funny lump size in %s",loadmodel->name);
6600
6601         loadmodel->brush.num_pvsclusters = LittleLong(in->numclusters);
6602         loadmodel->brush.num_pvsclusterbytes = LittleLong(in->chainlength);
6603         if (loadmodel->brush.num_pvsclusterbytes < ((loadmodel->brush.num_pvsclusters + 7) / 8))
6604                 Host_Error("Mod_Q3BSP_LoadPVS: (chainlength = %i) < ((numclusters = %i) + 7) / 8", loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.num_pvsclusters);
6605         totalchains = loadmodel->brush.num_pvsclusterbytes * loadmodel->brush.num_pvsclusters;
6606         if (l->filelen < totalchains + (int)sizeof(*in))
6607                 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);
6608
6609         loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, totalchains);
6610         memcpy(loadmodel->brush.data_pvsclusters, (unsigned char *)(in + 1), totalchains);
6611 }
6612
6613 static void Mod_Q3BSP_LightPoint(model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
6614 {
6615         int i, j, k, index[3];
6616         float transformed[3], blend1, blend2, blend, stylescale = 1;
6617         q3dlightgrid_t *a, *s;
6618
6619         // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
6620         // LadyHavoc: FIXME: is this true?
6621         stylescale = 1; // added while render
6622         //stylescale = r_refdef.scene.rtlightstylevalue[0];
6623
6624         if (!model->brushq3.num_lightgrid)
6625         {
6626                 ambientcolor[0] = stylescale;
6627                 ambientcolor[1] = stylescale;
6628                 ambientcolor[2] = stylescale;
6629                 return;
6630         }
6631
6632         Matrix4x4_Transform(&model->brushq3.num_lightgrid_indexfromworld, p, transformed);
6633         //Matrix4x4_Print(&model->brushq3.num_lightgrid_indexfromworld);
6634         //Con_Printf("%f %f %f transformed %f %f %f clamped ", p[0], p[1], p[2], transformed[0], transformed[1], transformed[2]);
6635         transformed[0] = bound(0, transformed[0], model->brushq3.num_lightgrid_isize[0] - 1);
6636         transformed[1] = bound(0, transformed[1], model->brushq3.num_lightgrid_isize[1] - 1);
6637         transformed[2] = bound(0, transformed[2], model->brushq3.num_lightgrid_isize[2] - 1);
6638         index[0] = (int)floor(transformed[0]);
6639         index[1] = (int)floor(transformed[1]);
6640         index[2] = (int)floor(transformed[2]);
6641         //Con_Printf("%f %f %f index %i %i %i:\n", transformed[0], transformed[1], transformed[2], index[0], index[1], index[2]);
6642
6643         // now lerp the values
6644         VectorClear(diffusenormal);
6645         a = &model->brushq3.data_lightgrid[(index[2] * model->brushq3.num_lightgrid_isize[1] + index[1]) * model->brushq3.num_lightgrid_isize[0] + index[0]];
6646         for (k = 0;k < 2;k++)
6647         {
6648                 blend1 = (k ? (transformed[2] - index[2]) : (1 - (transformed[2] - index[2])));
6649                 if (blend1 < 0.001f || index[2] + k >= model->brushq3.num_lightgrid_isize[2])
6650                         continue;
6651                 for (j = 0;j < 2;j++)
6652                 {
6653                         blend2 = blend1 * (j ? (transformed[1] - index[1]) : (1 - (transformed[1] - index[1])));
6654                         if (blend2 < 0.001f || index[1] + j >= model->brushq3.num_lightgrid_isize[1])
6655                                 continue;
6656                         for (i = 0;i < 2;i++)
6657                         {
6658                                 blend = blend2 * (i ? (transformed[0] - index[0]) : (1 - (transformed[0] - index[0]))) * stylescale;
6659                                 if (blend < 0.001f || index[0] + i >= model->brushq3.num_lightgrid_isize[0])
6660                                         continue;
6661                                 s = a + (k * model->brushq3.num_lightgrid_isize[1] + j) * model->brushq3.num_lightgrid_isize[0] + i;
6662                                 VectorMA(ambientcolor, blend * (1.0f / 128.0f), s->ambientrgb, ambientcolor);
6663                                 VectorMA(diffusecolor, blend * (1.0f / 128.0f), s->diffusergb, diffusecolor);
6664                                 // this uses the mod_md3_sin table because the values are
6665                                 // already in the 0-255 range, the 64+ bias fetches a cosine
6666                                 // instead of a sine value
6667                                 diffusenormal[0] += blend * (mod_md3_sin[64 + s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6668                                 diffusenormal[1] += blend * (mod_md3_sin[     s->diffuseyaw] * mod_md3_sin[s->diffusepitch]);
6669                                 diffusenormal[2] += blend * (mod_md3_sin[64 + s->diffusepitch]);
6670                                 //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)));
6671                         }
6672                 }
6673         }
6674
6675         // normalize the light direction before turning
6676         VectorNormalize(diffusenormal);
6677         //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]);
6678 }
6679
6680 static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3], double endpos[3])
6681 {
6682         double t1, t2;
6683         double midf, mid[3];
6684         int ret, side;
6685
6686         // check for empty
6687         while (node->plane)
6688         {
6689                 // find the point distances
6690                 mplane_t *plane = node->plane;
6691                 if (plane->type < 3)
6692                 {
6693                         t1 = p1[plane->type] - plane->dist;
6694                         t2 = p2[plane->type] - plane->dist;
6695                 }
6696                 else
6697                 {
6698                         t1 = DotProduct (plane->normal, p1) - plane->dist;
6699                         t2 = DotProduct (plane->normal, p2) - plane->dist;
6700                 }
6701
6702                 if (t1 < 0)
6703                 {
6704                         if (t2 < 0)
6705                         {
6706                                 node = node->children[1];
6707                                 continue;
6708                         }
6709                         side = 1;
6710                 }
6711                 else
6712                 {
6713                         if (t2 >= 0)
6714                         {
6715                                 node = node->children[0];
6716                                 continue;
6717                         }
6718                         side = 0;
6719                 }
6720
6721                 midf = t1 / (t1 - t2);
6722                 VectorLerp(p1, midf, p2, mid);
6723
6724                 // recurse both sides, front side first
6725                 // return 2 if empty is followed by solid (hit something)
6726                 // do not return 2 if both are solid or both empty,
6727                 // or if start is solid and end is empty
6728                 // as these degenerate cases usually indicate the eye is in solid and
6729                 // should see the target point anyway
6730                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid, endpos);
6731                 if (ret != 0)
6732                         return ret;
6733                 ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2, endpos);
6734                 if (ret != 1)
6735                         return ret;
6736                 VectorCopy(mid, endpos);
6737                 return 2;
6738         }
6739         return ((mleaf_t *)node)->clusterindex < 0;
6740 }
6741
6742 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)
6743 {
6744         if (model->brush.submodel || mod_q3bsp_tracelineofsight_brushes.integer)
6745         {
6746                 trace_t trace;
6747                 model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
6748                 return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
6749         }
6750         else
6751         {
6752                 double tracestart[3], traceend[3], traceendpos[3];
6753                 VectorCopy(start, tracestart);
6754                 VectorCopy(end, traceend);
6755                 VectorCopy(end, traceendpos);
6756                 Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend, traceendpos);
6757                 return BoxesOverlap(traceendpos, traceendpos, acceptmins, acceptmaxs);
6758         }
6759 }
6760
6761 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)
6762 {
6763         const bih_t *bih;
6764         const bih_leaf_t *leaf;
6765         const bih_node_t *node;
6766         const colbrushf_t *brush;
6767         int axis;
6768         int nodenum;
6769         int nodestackpos = 0;
6770         int nodestack[1024];
6771
6772         memset(trace, 0, sizeof(*trace));
6773         trace->fraction = 1;
6774         trace->hitsupercontentsmask = hitsupercontentsmask;
6775         trace->skipsupercontentsmask = skipsupercontentsmask;
6776         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6777
6778         bih = &model->collision_bih;
6779         if(!bih->nodes)
6780                 return;
6781
6782         nodenum = bih->rootnode;
6783         nodestack[nodestackpos++] = nodenum;
6784         while (nodestackpos)
6785         {
6786                 nodenum = nodestack[--nodestackpos];
6787                 node = bih->nodes + nodenum;
6788 #if 1
6789                 if (!BoxesOverlap(start, start, node->mins, node->maxs))
6790                         continue;
6791 #endif
6792                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6793                 {
6794                         axis = node->type - BIH_SPLITX;
6795                         if (start[axis] >= node->frontmin)
6796                                 nodestack[nodestackpos++] = node->front;
6797                         if (start[axis] <= node->backmax)
6798                                 nodestack[nodestackpos++] = node->back;
6799                 }
6800                 else if (node->type == BIH_UNORDERED)
6801                 {
6802                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6803                         {
6804                                 leaf = bih->leafs + node->children[axis];
6805 #if 1
6806                                 if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
6807                                         continue;
6808 #endif
6809                                 switch(leaf->type)
6810                                 {
6811                                 case BIH_BRUSH:
6812                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6813                                         Collision_TracePointBrushFloat(trace, start, brush);
6814                                         break;
6815                                 case BIH_COLLISIONTRIANGLE:
6816                                         // collision triangle - skipped because they have no volume
6817                                         break;
6818                                 case BIH_RENDERTRIANGLE:
6819                                         // render triangle - skipped because they have no volume
6820                                         break;
6821                                 }
6822                         }
6823                 }
6824         }
6825 }
6826
6827 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)
6828 {
6829         const bih_leaf_t *leaf;
6830         const bih_node_t *node;
6831         const colbrushf_t *brush;
6832         const int *e;
6833         const texture_t *texture;
6834         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6835         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6836         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6837
6838         if(!bih->nodes)
6839                 return;
6840
6841         if (VectorCompare(start, end))
6842         {
6843                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6844                 return;
6845         }
6846
6847         nodenum = bih->rootnode;
6848
6849         memset(trace, 0, sizeof(*trace));
6850         trace->fraction = 1;
6851         trace->hitsupercontentsmask = hitsupercontentsmask;
6852         trace->skipsupercontentsmask = skipsupercontentsmask;
6853         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6854
6855         // push first node
6856         nodestackline[nodestackpos][0] = start[0];
6857         nodestackline[nodestackpos][1] = start[1];
6858         nodestackline[nodestackpos][2] = start[2];
6859         nodestackline[nodestackpos][3] = end[0];
6860         nodestackline[nodestackpos][4] = end[1];
6861         nodestackline[nodestackpos][5] = end[2];
6862         nodestack[nodestackpos++] = nodenum;
6863         while (nodestackpos)
6864         {
6865                 nodenum = nodestack[--nodestackpos];
6866                 node = bih->nodes + nodenum;
6867                 VectorCopy(nodestackline[nodestackpos], nodestart);
6868                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
6869                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6870                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6871                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6872                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6873                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6874                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6875                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs) && !collision_bih_fullrecursion.integer)
6876                         continue;
6877                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
6878                 {
6879                         // recurse children of the split
6880                         axis = node->type - BIH_SPLITX;
6881                         d1 = node->backmax - nodestart[axis];
6882                         d2 = node->backmax - nodeend[axis];
6883                         d3 = nodestart[axis] - node->frontmin;
6884                         d4 = nodeend[axis] - node->frontmin;
6885                         if (collision_bih_fullrecursion.integer)
6886                                 d1 = d2 = d3 = d4 = 1; // force full recursion
6887                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
6888                         {
6889                         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;
6890                         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;
6891                         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;
6892                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6893                         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;
6894                         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;
6895                         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;
6896                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6897                         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;
6898                         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;
6899                         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;
6900                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
6901                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6902                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6903                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
6904                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
6905                         }
6906                 }
6907                 else if (node->type == BIH_UNORDERED)
6908                 {
6909                         // calculate sweep bounds for this node
6910                         // copy node bounds into local variables
6911                         VectorCopy(node->mins, nodebigmins);
6912                         VectorCopy(node->maxs, nodebigmaxs);
6913                         // clip line to this node bounds
6914                         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); }
6915                         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); }
6916                         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); }
6917                         // some of the line intersected the enlarged node box
6918                         // calculate sweep bounds for this node
6919                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
6920                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
6921                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
6922                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
6923                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
6924                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
6925                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
6926                         {
6927                                 leaf = bih->leafs + node->children[axis];
6928                                 // TODO: This is very expensive in Steel Storm. Framerate halved during even light combat.
6929                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
6930                                         continue;
6931                                 switch(leaf->type)
6932                                 {
6933                                 case BIH_BRUSH:
6934                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
6935                                         Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
6936                                         break;
6937                                 case BIH_COLLISIONTRIANGLE:
6938                                         if (!mod_q3bsp_curves_collisions.integer)
6939                                                 continue;
6940                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
6941                                         texture = model->data_textures + leaf->textureindex;
6942                                         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);
6943                                         break;
6944                                 case BIH_RENDERTRIANGLE:
6945                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
6946                                         texture = model->data_textures + leaf->textureindex;
6947                                         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);
6948                                         break;
6949                                 }
6950                         }
6951                 }
6952         }
6953 }
6954
6955 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)
6956 {
6957         if (VectorCompare(start, end))
6958         {
6959                 Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6960                 return;
6961         }
6962         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->collision_bih);
6963 }
6964
6965 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)
6966 {
6967         const bih_t *bih;
6968         const bih_leaf_t *leaf;
6969         const bih_node_t *node;
6970         const colbrushf_t *brush;
6971         const int *e;
6972         const texture_t *texture;
6973         vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
6974         vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
6975         vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
6976         int axis, nodenum, nodestackpos = 0, nodestack[1024];
6977
6978         if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
6979         {
6980                 if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
6981                         Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6982                 else
6983                         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
6984                 return;
6985         }
6986
6987         bih = &model->collision_bih;
6988         if(!bih->nodes)
6989                 return;
6990         nodenum = bih->rootnode;
6991
6992         // box trace, performed as brush trace
6993         memset(trace, 0, sizeof(*trace));
6994         trace->fraction = 1;
6995         trace->hitsupercontentsmask = hitsupercontentsmask;
6996         trace->skipsupercontentsmask = skipsupercontentsmask;
6997         trace->skipmaterialflagsmask = skipmaterialflagsmask;
6998
6999         // calculate tracebox-like parameters for efficient culling
7000         VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
7001         VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
7002         VectorSubtract(thisbrush_start->mins, start, startmins);
7003         VectorSubtract(thisbrush_start->maxs, start, startmaxs);
7004         VectorSubtract(thisbrush_end->mins, end, endmins);
7005         VectorSubtract(thisbrush_end->maxs, end, endmaxs);
7006         mins[0] = min(startmins[0], endmins[0]);
7007         mins[1] = min(startmins[1], endmins[1]);
7008         mins[2] = min(startmins[2], endmins[2]);
7009         maxs[0] = max(startmaxs[0], endmaxs[0]);
7010         maxs[1] = max(startmaxs[1], endmaxs[1]);
7011         maxs[2] = max(startmaxs[2], endmaxs[2]);
7012
7013         // push first node
7014         nodestackline[nodestackpos][0] = start[0];
7015         nodestackline[nodestackpos][1] = start[1];
7016         nodestackline[nodestackpos][2] = start[2];
7017         nodestackline[nodestackpos][3] = end[0];
7018         nodestackline[nodestackpos][4] = end[1];
7019         nodestackline[nodestackpos][5] = end[2];
7020         nodestack[nodestackpos++] = nodenum;
7021         while (nodestackpos)
7022         {
7023                 nodenum = nodestack[--nodestackpos];
7024                 node = bih->nodes + nodenum;
7025                 VectorCopy(nodestackline[nodestackpos], nodestart);
7026                 VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
7027                 sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7028                 sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7029                 sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7030                 sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7031                 sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7032                 sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7033                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
7034                         continue;
7035                 if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
7036                 {
7037                         // recurse children of the split
7038                         axis = node->type - BIH_SPLITX;
7039                         d1 = node->backmax - nodestart[axis] - mins[axis];
7040                         d2 = node->backmax - nodeend[axis] - mins[axis];
7041                         d3 = nodestart[axis] - node->frontmin + maxs[axis];
7042                         d4 = nodeend[axis] - node->frontmin + maxs[axis];
7043                         switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
7044                         {
7045                         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;
7046                         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;
7047                         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;
7048                         case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7049                         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;
7050                         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;
7051                         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;
7052                         case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7053                         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;
7054                         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;
7055                         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;
7056                         case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
7057                         case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7058                         case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7059                         case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
7060                         case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
7061                         }
7062                 }
7063                 else if (node->type == BIH_UNORDERED)
7064                 {
7065                         // calculate sweep bounds for this node
7066                         // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
7067                         VectorSubtract(node->mins, maxs, nodebigmins);
7068                         VectorSubtract(node->maxs, mins, nodebigmaxs);
7069                         // clip line to this node bounds
7070                         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); }
7071                         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); }
7072                         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); }
7073                         // some of the line intersected the enlarged node box
7074                         // calculate sweep bounds for this node
7075                         sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
7076                         sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
7077                         sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
7078                         sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
7079                         sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
7080                         sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
7081                         for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
7082                         {
7083                                 leaf = bih->leafs + node->children[axis];
7084                                 if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
7085                                         continue;
7086                                 switch(leaf->type)
7087                                 {
7088                                 case BIH_BRUSH:
7089                                         brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
7090                                         Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
7091                                         break;
7092                                 case BIH_COLLISIONTRIANGLE:
7093                                         if (!mod_q3bsp_curves_collisions.integer)
7094                                                 continue;
7095                                         e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
7096                                         texture = model->data_textures + leaf->textureindex;
7097                                         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);
7098                                         break;
7099                                 case BIH_RENDERTRIANGLE:
7100                                         e = model->surfmesh.data_element3i + 3*leaf->itemindex;
7101                                         texture = model->data_textures + leaf->textureindex;
7102                                         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);
7103                                         break;
7104                                 }
7105                         }
7106                 }
7107         }
7108 }
7109
7110 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)
7111 {
7112         colboxbrushf_t thisbrush_start, thisbrush_end;
7113         vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
7114
7115         // box trace, performed as brush trace
7116         VectorAdd(start, boxmins, boxstartmins);
7117         VectorAdd(start, boxmaxs, boxstartmaxs);
7118         VectorAdd(end, boxmins, boxendmins);
7119         VectorAdd(end, boxmaxs, boxendmaxs);
7120         Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
7121         Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
7122         Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7123 }
7124
7125
7126 int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
7127 {
7128         trace_t trace;
7129         Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0, 0, 0);
7130         return trace.startsupercontents;
7131 }
7132
7133 qbool Mod_CollisionBIH_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
7134 {
7135         trace_t trace;
7136         Mod_CollisionBIH_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
7137         return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
7138 }
7139
7140 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)
7141 {
7142 #if 0
7143         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7144         vec3_t end;
7145         int hitsupercontents;
7146         VectorSet(end, start[0], start[1], model->normalmins[2]);
7147 #endif
7148         memset(trace, 0, sizeof(*trace));
7149         trace->fraction = 1;
7150         trace->hitsupercontentsmask = hitsupercontentsmask;
7151         trace->skipsupercontentsmask = skipsupercontentsmask;
7152         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7153 #if 0
7154         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7155         hitsupercontents = trace->hitsupercontents;
7156         memset(trace, 0, sizeof(*trace));
7157         trace->fraction = 1;
7158         trace->hitsupercontentsmask = hitsupercontentsmask;
7159         trace->skipsupercontentsmask = skipsupercontentsmask;
7160         trace->skipmaterialflagsmask = skipmaterialflagsmask;
7161         trace->startsupercontents = hitsupercontents;
7162 #endif
7163 }
7164
7165 int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, const vec3_t start)
7166 {
7167 #if 0
7168         // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
7169         trace_t trace;
7170         vec3_t end;
7171         VectorSet(end, start[0], start[1], model->normalmins[2]);
7172         memset(&trace, 0, sizeof(trace));
7173         trace.fraction = 1;
7174         trace.hitsupercontentsmask = hitsupercontentsmask;
7175         trace.skipsupercontentsmask = skipsupercontentsmask;
7176         trace.skipmaterialflagsmask = skipmaterialflagsmask;
7177         Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
7178         return trace.hitsupercontents;
7179 #else
7180         return 0;
7181 #endif
7182 }
7183
7184 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)
7185 {
7186         Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->render_bih);
7187 }
7188
7189
7190 bih_t *Mod_MakeCollisionBIH(model_t *model, qbool userendersurfaces, bih_t *out)
7191 {
7192         int j;
7193         int bihnumleafs;
7194         int bihmaxnodes;
7195         int brushindex;
7196         int triangleindex;
7197         int bihleafindex;
7198         int nummodelbrushes = model->nummodelbrushes;
7199         const int *e;
7200         const int *collisionelement3i;
7201         const float *collisionvertex3f;
7202         const int *renderelement3i;
7203         const float *rendervertex3f;
7204         bih_leaf_t *bihleafs;
7205         bih_node_t *bihnodes;
7206         int *temp_leafsort;
7207         int *temp_leafsortscratch;
7208         const msurface_t *surface;
7209         const q3mbrush_t *brush;
7210
7211         // find out how many BIH leaf nodes we need
7212         bihnumleafs = 0;
7213         if (userendersurfaces)
7214         {
7215                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7216                         bihnumleafs += model->data_surfaces[j].num_triangles;
7217         }
7218         else
7219         {
7220                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7221                         if (brush->colbrushf)
7222                                 bihnumleafs++;
7223                 for (j = model->submodelsurfaces_start;j < model->submodelsurfaces_end;j++)
7224                 {
7225                         if (model->data_surfaces[j].texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
7226                                 bihnumleafs += model->data_surfaces[j].num_triangles + model->data_surfaces[j].num_collisiontriangles;
7227                         else
7228                                 bihnumleafs += model->data_surfaces[j].num_collisiontriangles;
7229                 }
7230         }
7231
7232         if (!bihnumleafs)
7233                 return NULL;
7234
7235         // allocate the memory for the BIH leaf nodes
7236         bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
7237
7238         // now populate the BIH leaf nodes
7239         bihleafindex = 0;
7240
7241         // add render surfaces
7242         renderelement3i = model->surfmesh.data_element3i;
7243         rendervertex3f = model->surfmesh.data_vertex3f;
7244         for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7245         {
7246                 surface = model->data_surfaces + j;
7247                 for (triangleindex = 0, e = renderelement3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
7248                 {
7249                         if (!userendersurfaces && !(surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS))
7250                                 continue;
7251                         bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
7252                         bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7253                         bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7254                         bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
7255                         bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
7256                         bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
7257                         bihleafs[bihleafindex].mins[2] = min(rendervertex3f[3*e[0]+2], min(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) - 1;
7258                         bihleafs[bihleafindex].maxs[0] = max(rendervertex3f[3*e[0]+0], max(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) + 1;
7259                         bihleafs[bihleafindex].maxs[1] = max(rendervertex3f[3*e[0]+1], max(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) + 1;
7260                         bihleafs[bihleafindex].maxs[2] = max(rendervertex3f[3*e[0]+2], max(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) + 1;
7261                         bihleafindex++;
7262                 }
7263         }
7264
7265         if (!userendersurfaces)
7266         {
7267                 // add collision brushes
7268                 for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
7269                 {
7270                         if (!brush->colbrushf)
7271                                 continue;
7272                         bihleafs[bihleafindex].type = BIH_BRUSH;
7273                         bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
7274                         bihleafs[bihleafindex].surfaceindex = -1;
7275                         bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
7276                         VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
7277                         VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
7278                         bihleafindex++;
7279                 }
7280
7281                 // add collision surfaces
7282                 collisionelement3i = model->brush.data_collisionelement3i;
7283                 collisionvertex3f = model->brush.data_collisionvertex3f;
7284                 for (j = model->submodelsurfaces_start; j < model->submodelsurfaces_end; j++)
7285                 {
7286                         surface = model->data_surfaces + j;
7287                         for (triangleindex = 0, e = collisionelement3i + 3*surface->num_firstcollisiontriangle;triangleindex < surface->num_collisiontriangles;triangleindex++, e += 3)
7288                         {
7289                                 bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
7290                                 bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
7291                                 bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
7292                                 bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
7293                                 bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
7294                                 bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
7295                                 bihleafs[bihleafindex].mins[2] = min(collisionvertex3f[3*e[0]+2], min(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) - 1;
7296                                 bihleafs[bihleafindex].maxs[0] = max(collisionvertex3f[3*e[0]+0], max(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) + 1;
7297                                 bihleafs[bihleafindex].maxs[1] = max(collisionvertex3f[3*e[0]+1], max(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) + 1;
7298                                 bihleafs[bihleafindex].maxs[2] = max(collisionvertex3f[3*e[0]+2], max(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) + 1;
7299                                 bihleafindex++;
7300                         }
7301                 }
7302         }
7303
7304         // allocate buffers for the produced and temporary data
7305         bihmaxnodes = bihnumleafs + 1;
7306         bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
7307         temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
7308         temp_leafsortscratch = temp_leafsort + bihnumleafs;
7309
7310         // now build it
7311         BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
7312
7313         // we're done with the temporary data
7314         Mem_Free(temp_leafsort);
7315
7316         // resize the BIH nodes array if it over-allocated
7317         if (out->maxnodes > out->numnodes)
7318         {
7319                 out->maxnodes = out->numnodes;
7320                 out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
7321         }
7322
7323         return out;
7324 }
7325
7326 static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents)
7327 {
7328         int supercontents = 0;
7329         if (nativecontents & CONTENTSQ3_SOLID)
7330                 supercontents |= SUPERCONTENTS_SOLID;
7331         if (nativecontents & CONTENTSQ3_WATER)
7332                 supercontents |= SUPERCONTENTS_WATER;
7333         if (nativecontents & CONTENTSQ3_SLIME)
7334                 supercontents |= SUPERCONTENTS_SLIME;
7335         if (nativecontents & CONTENTSQ3_LAVA)
7336                 supercontents |= SUPERCONTENTS_LAVA;
7337         if (nativecontents & CONTENTSQ3_BODY)
7338                 supercontents |= SUPERCONTENTS_BODY;
7339         if (nativecontents & CONTENTSQ3_CORPSE)
7340                 supercontents |= SUPERCONTENTS_CORPSE;
7341         if (nativecontents & CONTENTSQ3_NODROP)
7342                 supercontents |= SUPERCONTENTS_NODROP;
7343         if (nativecontents & CONTENTSQ3_PLAYERCLIP)
7344                 supercontents |= SUPERCONTENTS_PLAYERCLIP;
7345         if (nativecontents & CONTENTSQ3_MONSTERCLIP)
7346                 supercontents |= SUPERCONTENTS_MONSTERCLIP;
7347         if (nativecontents & CONTENTSQ3_DONOTENTER)
7348                 supercontents |= SUPERCONTENTS_DONOTENTER;
7349         if (nativecontents & CONTENTSQ3_BOTCLIP)
7350                 supercontents |= SUPERCONTENTS_BOTCLIP;
7351         if (!(nativecontents & CONTENTSQ3_TRANSLUCENT))
7352                 supercontents |= SUPERCONTENTS_OPAQUE;
7353         return supercontents;
7354 }
7355
7356 static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents)
7357 {
7358         int nativecontents = 0;
7359         if (supercontents & SUPERCONTENTS_SOLID)
7360                 nativecontents |= CONTENTSQ3_SOLID;
7361         if (supercontents & SUPERCONTENTS_WATER)
7362                 nativecontents |= CONTENTSQ3_WATER;
7363         if (supercontents & SUPERCONTENTS_SLIME)
7364                 nativecontents |= CONTENTSQ3_SLIME;
7365         if (supercontents & SUPERCONTENTS_LAVA)
7366                 nativecontents |= CONTENTSQ3_LAVA;
7367         if (supercontents & SUPERCONTENTS_BODY)
7368                 nativecontents |= CONTENTSQ3_BODY;
7369         if (supercontents & SUPERCONTENTS_CORPSE)
7370                 nativecontents |= CONTENTSQ3_CORPSE;
7371         if (supercontents & SUPERCONTENTS_NODROP)
7372                 nativecontents |= CONTENTSQ3_NODROP;
7373         if (supercontents & SUPERCONTENTS_PLAYERCLIP)
7374                 nativecontents |= CONTENTSQ3_PLAYERCLIP;
7375         if (supercontents & SUPERCONTENTS_MONSTERCLIP)
7376                 nativecontents |= CONTENTSQ3_MONSTERCLIP;
7377         if (supercontents & SUPERCONTENTS_DONOTENTER)
7378                 nativecontents |= CONTENTSQ3_DONOTENTER;
7379         if (supercontents & SUPERCONTENTS_BOTCLIP)
7380                 nativecontents |= CONTENTSQ3_BOTCLIP;
7381         if (!(supercontents & SUPERCONTENTS_OPAQUE))
7382                 nativecontents |= CONTENTSQ3_TRANSLUCENT;
7383         return nativecontents;
7384 }
7385
7386 static void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
7387 {
7388         int numleafs;
7389         while (node->plane)
7390         {
7391                 Mod_Q3BSP_RecursiveFindNumLeafs(node->children[0]);
7392                 node = node->children[1];
7393         }
7394         numleafs = ((mleaf_t *)node - loadmodel->brush.data_leafs) + 1;
7395         if (loadmodel->brush.num_leafs < numleafs)
7396                 loadmodel->brush.num_leafs = numleafs;
7397 }
7398
7399 static void Mod_Q3BSP_Load(model_t *mod, void *buffer, void *bufferend)
7400 {
7401         int i, j, lumps;
7402         q3dheader_t *header;
7403         float corner[3], yawradius, modelradius;
7404
7405         mod->modeldatatypestring = "Q3BSP";
7406
7407         mod->type = mod_brushq3;
7408         mod->brush.ishlbsp = false;
7409         mod->brush.isbsp2rmqe = false;
7410         mod->brush.isbsp2 = false;
7411         mod->brush.isq2bsp = false;
7412         mod->brush.isq3bsp = true;
7413         mod->brush.skymasking = true;
7414         mod->numframes = 2; // although alternate textures are not supported it is annoying to complain about no such frame 1
7415         mod->numskins = 1;
7416
7417         header = (q3dheader_t *)buffer;
7418         if((char *) bufferend < (char *) buffer + sizeof(q3dheader_t))
7419                 Host_Error("Mod_Q3BSP_Load: %s is smaller than its header", mod->name);
7420
7421         i = LittleLong(header->version);
7422         if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG && i != Q3BSPVERSION_LIVE)
7423                 Host_Error("Mod_Q3BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q3BSPVERSION);
7424
7425         mod->soundfromcenter = true;
7426         mod->TraceBox = Mod_CollisionBIH_TraceBox;
7427         mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
7428         mod->TraceLine = Mod_CollisionBIH_TraceLine;
7429         mod->TracePoint = Mod_CollisionBIH_TracePoint;
7430         mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
7431         mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
7432         mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
7433         mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
7434         mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
7435         mod->brush.GetPVS = Mod_BSP_GetPVS;
7436         mod->brush.FatPVS = Mod_BSP_FatPVS;
7437         mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
7438         mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
7439         mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
7440         mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
7441         mod->brush.LightPoint = Mod_Q3BSP_LightPoint;
7442         mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
7443         mod->brush.AmbientSoundLevelsForPoint = NULL;
7444         mod->brush.RoundUpToHullSize = NULL;
7445         mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
7446         mod->Draw = R_Mod_Draw;
7447         mod->DrawDepth = R_Mod_DrawDepth;
7448         mod->DrawDebug = R_Mod_DrawDebug;
7449         mod->DrawPrepass = R_Mod_DrawPrepass;
7450         mod->GetLightInfo = R_Mod_GetLightInfo;
7451         mod->CompileShadowMap = R_Mod_CompileShadowMap;
7452         mod->DrawShadowMap = R_Mod_DrawShadowMap;
7453         mod->DrawLight = R_Mod_DrawLight;
7454
7455         mod_base = (unsigned char *)header;
7456
7457         // swap all the lumps
7458         header->ident = LittleLong(header->ident);
7459         header->version = LittleLong(header->version);
7460         lumps = (header->version == Q3BSPVERSION_LIVE) ? Q3HEADER_LUMPS_LIVE : Q3HEADER_LUMPS;
7461         for (i = 0;i < lumps;i++)
7462         {
7463                 j = (header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs));
7464                 if((char *) bufferend < (char *) buffer + j)
7465                         Host_Error("Mod_Q3BSP_Load: %s has a lump that starts outside the file!", mod->name);
7466                 j += (header->lumps[i].filelen = LittleLong(header->lumps[i].filelen));
7467                 if((char *) bufferend < (char *) buffer + j)
7468                         Host_Error("Mod_Q3BSP_Load: %s has a lump that ends outside the file!", mod->name);
7469         }
7470         /*
7471          * NO, do NOT clear them!
7472          * they contain actual data referenced by other stuff.
7473          * Instead, before using the advertisements lump, check header->versio
7474          * again!
7475          * Sorry, but otherwise it breaks memory of the first lump.
7476         for (i = lumps;i < Q3HEADER_LUMPS_MAX;i++)
7477         {
7478                 header->lumps[i].fileofs = 0;
7479                 header->lumps[i].filelen = 0;
7480         }
7481         */
7482
7483         mod->brush.qw_md4sum = 0;
7484         mod->brush.qw_md4sum2 = 0;
7485         for (i = 0;i < lumps;i++)
7486         {
7487                 if (i == Q3LUMP_ENTITIES)
7488                         continue;
7489                 mod->brush.qw_md4sum ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7490                 if (i == Q3LUMP_PVS || i == Q3LUMP_LEAFS || i == Q3LUMP_NODES)
7491                         continue;
7492                 mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
7493
7494                 // all this checksumming can take a while, so let's send keepalives here too
7495                 CL_KeepaliveMessage(false);
7496         }
7497
7498         // allocate a texture pool if we need it
7499         if (mod->texturepool == NULL)
7500                 mod->texturepool = R_AllocTexturePool();
7501
7502         Mod_Q3BSP_LoadEntities(&header->lumps[Q3LUMP_ENTITIES]);
7503         Mod_Q3BSP_LoadTextures(&header->lumps[Q3LUMP_TEXTURES]);
7504         Mod_Q3BSP_LoadPlanes(&header->lumps[Q3LUMP_PLANES]);
7505         if (header->version == Q3BSPVERSION_IG)
7506                 Mod_Q3BSP_LoadBrushSides_IG(&header->lumps[Q3LUMP_BRUSHSIDES]);
7507         else
7508                 Mod_Q3BSP_LoadBrushSides(&header->lumps[Q3LUMP_BRUSHSIDES]);
7509         Mod_Q3BSP_LoadBrushes(&header->lumps[Q3LUMP_BRUSHES]);
7510         Mod_Q3BSP_LoadEffects(&header->lumps[Q3LUMP_EFFECTS]);
7511         Mod_Q3BSP_LoadVertices(&header->lumps[Q3LUMP_VERTICES]);
7512         Mod_Q3BSP_LoadTriangles(&header->lumps[Q3LUMP_TRIANGLES]);
7513         Mod_Q3BSP_LoadLightmaps(&header->lumps[Q3LUMP_LIGHTMAPS], &header->lumps[Q3LUMP_FACES]);
7514         Mod_Q3BSP_LoadFaces(&header->lumps[Q3LUMP_FACES]);
7515         Mod_Q3BSP_LoadModels(&header->lumps[Q3LUMP_MODELS]);
7516         Mod_Q3BSP_LoadLeafBrushes(&header->lumps[Q3LUMP_LEAFBRUSHES]);
7517         Mod_Q3BSP_LoadLeafFaces(&header->lumps[Q3LUMP_LEAFFACES]);
7518         Mod_Q3BSP_LoadLeafs(&header->lumps[Q3LUMP_LEAFS]);
7519         Mod_Q3BSP_LoadNodes(&header->lumps[Q3LUMP_NODES]);
7520         Mod_Q3BSP_LoadLightGrid(&header->lumps[Q3LUMP_LIGHTGRID]);
7521         Mod_Q3BSP_LoadPVS(&header->lumps[Q3LUMP_PVS]);
7522         loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
7523
7524         // the MakePortals code works fine on the q3bsp data as well
7525         if (mod_bsp_portalize.integer)
7526                 Mod_BSP_MakePortals();
7527
7528         // FIXME: shader alpha should replace r_wateralpha support in q3bsp
7529         loadmodel->brush.supportwateralpha = true;
7530
7531         loadmodel->brush.num_leafs = 0;
7532         Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
7533
7534         if (loadmodel->brush.numsubmodels)
7535                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
7536
7537         mod = loadmodel;
7538         mod->modelsurfaces_sorted = (int*)Mem_Alloc(loadmodel->mempool, mod->num_surfaces * sizeof(*mod->modelsurfaces_sorted));
7539         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
7540         {
7541                 if (i > 0)
7542                 {
7543                         char name[10];
7544                         // duplicate the basic information
7545                         dpsnprintf(name, sizeof(name), "*%i", i);
7546                         mod = Mod_FindName(name, loadmodel->name);
7547                         // copy the base model to this one
7548                         *mod = *loadmodel;
7549                         // rename the clone back to its proper name
7550                         strlcpy(mod->name, name, sizeof(mod->name));
7551                         mod->brush.parentmodel = loadmodel;
7552                         // textures and memory belong to the main model
7553                         mod->texturepool = NULL;
7554                         mod->mempool = NULL;
7555                         mod->brush.GetPVS = NULL;
7556                         mod->brush.FatPVS = NULL;
7557                         mod->brush.BoxTouchingPVS = NULL;
7558                         mod->brush.BoxTouchingLeafPVS = NULL;
7559                         mod->brush.BoxTouchingVisibleLeafs = NULL;
7560                         mod->brush.FindBoxClusters = NULL;
7561                         mod->brush.LightPoint = NULL;
7562                         mod->brush.AmbientSoundLevelsForPoint = NULL;
7563                 }
7564                 mod->brush.submodel = i;
7565                 if (loadmodel->brush.submodels)
7566                         loadmodel->brush.submodels[i] = mod;
7567
7568                 // make the model surface list (used by shadowing/lighting)
7569                 mod->submodelsurfaces_start = mod->brushq3.data_models[i].firstface;
7570                 mod->submodelsurfaces_end = mod->brushq3.data_models[i].firstface + mod->brushq3.data_models[i].numfaces;
7571                 mod->firstmodelbrush = mod->brushq3.data_models[i].firstbrush;
7572                 mod->nummodelbrushes = mod->brushq3.data_models[i].numbrushes;
7573
7574                 VectorCopy(mod->brushq3.data_models[i].mins, mod->normalmins);
7575                 VectorCopy(mod->brushq3.data_models[i].maxs, mod->normalmaxs);
7576                 // enlarge the bounding box to enclose all geometry of this model,
7577                 // because q3map2 sometimes lies (mostly to affect the lightgrid),
7578                 // which can in turn mess up the farclip (as well as culling when
7579                 // outside the level - an unimportant concern)
7580
7581                 //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]);
7582                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
7583                 {
7584                         const msurface_t *surface = mod->data_surfaces + j;
7585                         const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
7586                         int k;
7587                         if (!surface->num_vertices)
7588                                 continue;
7589                         for (k = 0;k < surface->num_vertices;k++, v += 3)
7590                         {
7591                                 mod->normalmins[0] = min(mod->normalmins[0], v[0]);
7592                                 mod->normalmins[1] = min(mod->normalmins[1], v[1]);
7593                                 mod->normalmins[2] = min(mod->normalmins[2], v[2]);
7594                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
7595                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
7596                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
7597                         }
7598                 }
7599                 //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]);
7600                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
7601                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
7602                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
7603                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
7604                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
7605                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
7606                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
7607                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
7608                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
7609                 mod->yawmins[2] = mod->normalmins[2];
7610                 mod->yawmaxs[2] = mod->normalmaxs[2];
7611                 mod->radius = modelradius;
7612                 mod->radius2 = modelradius * modelradius;
7613
7614                 Mod_SetDrawSkyAndWater(mod);
7615                 Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
7616                 Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
7617
7618                 // generate VBOs and other shared data before cloning submodels
7619                 if (i == 0)
7620                         Mod_BuildVBOs();
7621         }
7622         mod = loadmodel;
7623
7624         // make the model surface list (used by shadowing/lighting)
7625         Mod_MakeSortedSurfaces(loadmodel);
7626
7627         if (mod_q3bsp_sRGBlightmaps.integer)
7628         {
7629                 if (vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
7630                 {
7631                         // actually we do in sRGB fallback with sRGB lightmaps: Image_sRGBFloatFromLinear_Lightmap(Image_LinearFloatFromsRGBFloat(x))
7632                         // neutral point is at Image_sRGBFloatFromLinearFloat(0.5)
7633                         // so we need to map Image_sRGBFloatFromLinearFloat(0.5) to 0.5
7634                         // factor is 0.5 / Image_sRGBFloatFromLinearFloat(0.5)
7635                         //loadmodel->lightmapscale *= 0.679942f; // fixes neutral level
7636                 }
7637                 else // if this is NOT set, regular rendering looks right by this requirement anyway
7638                 {
7639                         /*
7640                         // we want color 1 to do the same as without sRGB
7641                         // so, we want to map 1 to Image_LinearFloatFromsRGBFloat(2) instead of to 2
7642                         loadmodel->lightmapscale *= 2.476923f; // fixes max level
7643                         */
7644
7645                         // neutral level 0.5 gets uploaded as sRGB and becomes Image_LinearFloatFromsRGBFloat(0.5)
7646                         // we need to undo that
7647                         loadmodel->lightmapscale *= 2.336f; // fixes neutral level
7648                 }
7649         }
7650
7651         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);
7652 }
7653
7654 void Mod_IBSP_Load(model_t *mod, void *buffer, void *bufferend)
7655 {
7656         int i = LittleLong(((int *)buffer)[1]);
7657         if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG || i == Q3BSPVERSION_LIVE)
7658                 Mod_Q3BSP_Load(mod,buffer, bufferend);
7659         else if (i == Q2BSPVERSION)
7660                 Mod_Q2BSP_Load(mod,buffer, bufferend);
7661         else
7662                 Host_Error("Mod_IBSP_Load: unknown/unsupported version %i", i);
7663 }
7664
7665 static void Mod_VBSP_LoadEntities(sizebuf_t *sb)
7666 {
7667         loadmodel->brush.entities = NULL;
7668         if (!sb->cursize)
7669                 return;
7670         loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
7671         MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
7672         loadmodel->brush.entities[sb->cursize] = 0;
7673 }
7674
7675 static void Mod_VBSP_LoadVertexes(sizebuf_t *sb)
7676 {
7677         mvertex_t       *out;
7678         int                     i, count;
7679         int                     structsize = 12;
7680
7681         if (sb->cursize % structsize)
7682                 Host_Error("Mod_VBSP_LoadVertexes: funny lump size in %s",loadmodel->name);
7683         count = sb->cursize / structsize;
7684         out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
7685
7686         loadmodel->brushq1.vertexes = out;
7687         loadmodel->brushq1.numvertexes = count;
7688
7689         for ( i=0 ; i<count ; i++, out++)
7690         {
7691                 out->position[0] = MSG_ReadLittleFloat(sb);
7692                 out->position[1] = MSG_ReadLittleFloat(sb);
7693                 out->position[2] = MSG_ReadLittleFloat(sb);
7694         }
7695 }
7696
7697 static void Mod_VBSP_LoadEdges(sizebuf_t *sb)
7698 {
7699         medge_t *out;
7700         int     i, count;
7701         int             structsize = 4;
7702
7703         if (sb->cursize % structsize)
7704                 Host_Error("Mod_VBSP_LoadEdges: funny lump size in %s",loadmodel->name);
7705         count = sb->cursize / structsize;
7706         out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7707
7708         loadmodel->brushq1.edges = out;
7709         loadmodel->brushq1.numedges = count;
7710
7711         for ( i=0 ; i<count ; i++, out++)
7712         {
7713                 out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
7714                 out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
7715
7716                 if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
7717                 {
7718                         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);
7719                         if(!loadmodel->brushq1.numvertexes)
7720                                 Host_Error("Mod_VBSP_LoadEdges: %s has edges but no vertexes, cannot fix\n", loadmodel->name);
7721
7722                         out->v[0] = 0;
7723                         out->v[1] = 0;
7724                 }
7725         }
7726 }
7727
7728 static void Mod_VBSP_LoadSurfedges(sizebuf_t *sb)
7729 {
7730         int             i;
7731         int structsize = 4;
7732
7733         if (sb->cursize % structsize)
7734                 Host_Error("Mod_VBSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
7735         loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
7736         loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
7737
7738         for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
7739                 loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
7740 }
7741
7742 static void Mod_VBSP_LoadTextures(sizebuf_t *sb)
7743 {
7744         Con_Printf(CON_WARN "Mod_VBSP_LoadTextures: Don't know how to do this yet\n");
7745 }
7746
7747 static void Mod_VBSP_LoadPlanes(sizebuf_t *sb)
7748 {
7749         int                     i;
7750         mplane_t        *out;
7751         int structsize = 20;
7752
7753         if (sb->cursize % structsize)
7754                 Host_Error("Mod_VBSP_LoadPlanes: funny lump size in %s", loadmodel->name);
7755         loadmodel->brush.num_planes = sb->cursize / structsize;
7756         loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
7757
7758         for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
7759         {
7760                 out->normal[0] = MSG_ReadLittleFloat(sb);
7761                 out->normal[1] = MSG_ReadLittleFloat(sb);
7762                 out->normal[2] = MSG_ReadLittleFloat(sb);
7763                 out->dist = MSG_ReadLittleFloat(sb);
7764                 MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
7765                 PlaneClassify(out);
7766         }
7767 }
7768
7769 static void Mod_VBSP_LoadTexinfo(sizebuf_t *sb)
7770 {
7771         mtexinfo_t *out;
7772         int i, j, k, count, miptex;
7773         int structsize = 72;
7774
7775         if (sb->cursize % structsize)
7776                 Host_Error("Mod_VBSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
7777         count = sb->cursize / structsize;
7778         out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
7779
7780         loadmodel->brushq1.texinfo = out;
7781         loadmodel->brushq1.numtexinfo = count;
7782
7783         for (i = 0;i < count;i++, out++)
7784         {
7785                 for (k = 0;k < 2;k++)
7786                         for (j = 0;j < 4;j++)
7787                                 out->vecs[k][j] = MSG_ReadLittleFloat(sb);
7788
7789                 for (k = 0;k < 2;k++)
7790                         for (j = 0;j < 4;j++)
7791                                 MSG_ReadLittleFloat(sb); // TODO lightmapVecs
7792
7793                 out->q1flags = MSG_ReadLittleLong(sb);
7794                 miptex = MSG_ReadLittleLong(sb);
7795
7796                 if (out->q1flags & TEX_SPECIAL)
7797                 {
7798                         // if texture chosen is NULL or the shader needs a lightmap,
7799                         // force to notexture water shader
7800                         out->textureindex = loadmodel->num_textures - 1;
7801                 }
7802                 else
7803                 {
7804                         // if texture chosen is NULL, force to notexture
7805                         out->textureindex = loadmodel->num_textures - 2;
7806                 }
7807                 // see if the specified miptex is valid and try to use it instead
7808                 if (loadmodel->data_textures)
7809                 {
7810                         if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
7811                                 Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
7812                         else
7813                                 out->textureindex = miptex;
7814                 }
7815         }
7816 }
7817
7818 static void Mod_VBSP_LoadFaces(sizebuf_t *sb)
7819 {
7820         msurface_t *surface;
7821         int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
7822         float texmins[2], texmaxs[2], val;
7823         rtexture_t *lightmaptexture, *deluxemaptexture;
7824         char vabuf[1024];
7825         int structsize =  56;
7826
7827         if (sb->cursize % structsize)
7828                 Host_Error("Mod_VBSP_LoadFaces: funny lump size in %s",loadmodel->name);
7829         count = sb->cursize / structsize;
7830         loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
7831         loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
7832
7833         loadmodel->num_surfaces = count;
7834
7835         loadmodel->brushq1.firstrender = true;
7836         loadmodel->brushq1.lightmapupdateflags = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*sizeof(unsigned char));
7837
7838         totalverts = 0;
7839         totaltris = 0;
7840         for (surfacenum = 0;surfacenum < count;surfacenum++)
7841         {
7842                 numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
7843                 totalverts += numedges;
7844                 totaltris += numedges - 2;
7845         }
7846
7847         Mod_AllocSurfMesh(loadmodel->mempool, totalverts, totaltris, true, false);
7848
7849         lightmaptexture = NULL;
7850         deluxemaptexture = r_texture_blanknormalmap;
7851         lightmapnumber = 0;
7852         lightmapsize = bound(256, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d);
7853         totallightmapsamples = 0;
7854
7855         totalverts = 0;
7856         totaltris = 0;
7857         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
7858         {
7859                 surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
7860                 planenum = (unsigned short)MSG_ReadLittleShort(sb);
7861                 /*side = */MSG_ReadLittleShort(sb); // TODO support onNode?
7862                 firstedge = MSG_ReadLittleLong(sb);
7863                 numedges = (unsigned short)MSG_ReadLittleShort(sb);
7864                 texinfoindex = (unsigned short)MSG_ReadLittleShort(sb);
7865                 MSG_ReadLittleLong(sb); // skipping over dispinfo and surfaceFogVolumeID, both short
7866                 for (i = 0;i < MAXLIGHTMAPS;i++)
7867                         surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
7868                 lightmapoffset = MSG_ReadLittleLong(sb);
7869
7870                 // FIXME: validate edges, texinfo, etc?
7871                 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)
7872                         Host_Error("Mod_VBSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
7873                 if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
7874                         Host_Error("Mod_VBSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
7875                 if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
7876                         Host_Error("Mod_VBSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
7877
7878                 surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
7879                 surface->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
7880
7881                 // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
7882                 if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
7883                         lightmapoffset = -1;
7884
7885                 //surface->flags = surface->texture->flags;
7886                 //if (LittleShort(in->side))
7887                 //      surface->flags |= SURF_PLANEBACK;
7888                 //surface->plane = loadmodel->brush.data_planes + planenum;
7889
7890                 surface->num_firstvertex = totalverts;
7891                 surface->num_vertices = numedges;
7892                 surface->num_firsttriangle = totaltris;
7893                 surface->num_triangles = numedges - 2;
7894                 totalverts += numedges;
7895                 totaltris += numedges - 2;
7896
7897                 // convert edges back to a normal polygon
7898                 for (i = 0;i < surface->num_vertices;i++)
7899                 {
7900                         int lindex = loadmodel->brushq1.surfedges[firstedge + i];
7901                         float s, t;
7902                         // note: the q1bsp format does not allow a 0 surfedge (it would have no negative counterpart)
7903                         if (lindex >= 0)
7904                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[lindex].v[0]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7905                         else
7906                                 VectorCopy(loadmodel->brushq1.vertexes[loadmodel->brushq1.edges[-lindex].v[1]].position, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3);
7907                         s = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7908                         t = DotProduct(((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7909                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 0] = s / surface->texture->width;
7910                         (loadmodel->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[i * 2 + 1] = t / surface->texture->height;
7911                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = 0;
7912                         (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = 0;
7913                         (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = 0;
7914                 }
7915
7916                 for (i = 0;i < surface->num_triangles;i++)
7917                 {
7918                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 0] = 0 + surface->num_firstvertex;
7919                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 1] = i + 1 + surface->num_firstvertex;
7920                         (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[i * 3 + 2] = i + 2 + surface->num_firstvertex;
7921                 }
7922
7923                 // compile additional data about the surface geometry
7924                 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);
7925                 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);
7926                 BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
7927
7928                 // generate surface extents information
7929                 texmins[0] = texmaxs[0] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3];
7930                 texmins[1] = texmaxs[1] = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex), surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3];
7931                 for (i = 1;i < surface->num_vertices;i++)
7932                 {
7933                         for (j = 0;j < 2;j++)
7934                         {
7935                                 val = DotProduct((loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex) + i * 3, surface->lightmapinfo->texinfo->vecs[j]) + surface->lightmapinfo->texinfo->vecs[j][3];
7936                                 texmins[j] = min(texmins[j], val);
7937                                 texmaxs[j] = max(texmaxs[j], val);
7938                         }
7939                 }
7940                 for (i = 0;i < 2;i++)
7941                 {
7942                         surface->lightmapinfo->texturemins[i] = (int) floor(texmins[i] / 16.0) * 16;
7943                         surface->lightmapinfo->extents[i] = (int) ceil(texmaxs[i] / 16.0) * 16 - surface->lightmapinfo->texturemins[i];
7944                 }
7945
7946                 smax = surface->lightmapinfo->extents[0] >> 4;
7947                 tmax = surface->lightmapinfo->extents[1] >> 4;
7948                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
7949                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
7950
7951                 // lighting info
7952                 surface->lightmaptexture = NULL;
7953                 surface->deluxemaptexture = r_texture_blanknormalmap;
7954                 if (lightmapoffset == -1)
7955                 {
7956                         surface->lightmapinfo->samples = NULL;
7957 #if 1
7958                         // give non-lightmapped water a 1x white lightmap
7959                         if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
7960                         {
7961                                 surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
7962                                 surface->lightmapinfo->styles[0] = 0;
7963                                 memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
7964                         }
7965 #endif
7966                 }
7967                 else
7968                         surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
7969
7970                 // check if we should apply a lightmap to this
7971                 if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
7972                 {
7973                         if (ssize > 256 || tsize > 256)
7974                                 Host_Error("Bad surface extents");
7975
7976                         if (lightmapsize < ssize)
7977                                 lightmapsize = ssize;
7978                         if (lightmapsize < tsize)
7979                                 lightmapsize = tsize;
7980
7981                         totallightmapsamples += ssize*tsize;
7982
7983                         // force lightmap upload on first time seeing the surface
7984                         //
7985                         // additionally this is used by the later code to see if a
7986                         // lightmap is needed on this surface (rather than duplicating the
7987                         // logic above)
7988                         loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
7989                         loadmodel->lit = true;
7990                 }
7991         }
7992
7993         // small maps (such as ammo boxes especially) don't need big lightmap
7994         // textures, so this code tries to guess a good size based on
7995         // totallightmapsamples (size of the lightmaps lump basically), as well as
7996         // trying to max out the size if there is a lot of lightmap data to store
7997         // additionally, never choose a lightmapsize that is smaller than the
7998         // largest surface encountered (as it would fail)
7999         i = lightmapsize;
8000         for (lightmapsize = 64; (lightmapsize < i) && (lightmapsize < bound(128, gl_max_lightmapsize.integer, (int)vid.maxtexturesize_2d)) && (totallightmapsamples > lightmapsize*lightmapsize); lightmapsize*=2)
8001                 ;
8002
8003         // now that we've decided the lightmap texture size, we can do the rest
8004         if (cls.state != ca_dedicated)
8005         {
8006                 int stainmapsize = 0;
8007                 mod_alloclightmap_state_t allocState;
8008
8009                 Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
8010                 for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8011                 {
8012                         int iu, iv, lightmapx = 0, lightmapy = 0;
8013                         float u, v, ubase, vbase, uscale, vscale;
8014
8015                         if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8016                                 continue;
8017
8018                         smax = surface->lightmapinfo->extents[0] >> 4;
8019                         tmax = surface->lightmapinfo->extents[1] >> 4;
8020                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8021                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8022                         stainmapsize += ssize * tsize * 3;
8023
8024                         if (!lightmaptexture || !Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy))
8025                         {
8026                                 // allocate a texture pool if we need it
8027                                 if (loadmodel->texturepool == NULL)
8028                                         loadmodel->texturepool = R_AllocTexturePool();
8029                                 // could not find room, make a new lightmap
8030                                 loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
8031                                 loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
8032                                 loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
8033                                 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);
8034                                 if (loadmodel->brushq1.nmaplightdata)
8035                                         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);
8036                                 lightmapnumber++;
8037                                 Mod_AllocLightmap_Reset(&allocState);
8038                                 Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
8039                         }
8040                         surface->lightmaptexture = lightmaptexture;
8041                         surface->deluxemaptexture = deluxemaptexture;
8042                         surface->lightmapinfo->lightmaporigin[0] = lightmapx;
8043                         surface->lightmapinfo->lightmaporigin[1] = lightmapy;
8044
8045                         uscale = 1.0f / (float)lightmapsize;
8046                         vscale = 1.0f / (float)lightmapsize;
8047                         ubase = lightmapx * uscale;
8048                         vbase = lightmapy * vscale;
8049
8050                         for (i = 0;i < surface->num_vertices;i++)
8051                         {
8052                                 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);
8053                                 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);
8054                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 0] = u * uscale + ubase;
8055                                 (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[i * 2 + 1] = v * vscale + vbase;
8056                                 // LadyHavoc: calc lightmap data offset for vertex lighting to use
8057                                 iu = (int) u;
8058                                 iv = (int) v;
8059                                 (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
8060                         }
8061                 }
8062
8063                 if (cl_stainmaps.integer)
8064                 {
8065                         // allocate stainmaps for permanent marks on walls and clear white
8066                         unsigned char *stainsamples = NULL;
8067                         stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
8068                         memset(stainsamples, 255, stainmapsize);
8069                         // assign pointers
8070                         for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
8071                         {
8072                                 if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
8073                                         continue;
8074                                 ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
8075                                 tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
8076                                 surface->lightmapinfo->stainsamples = stainsamples;
8077                                 stainsamples += ssize * tsize * 3;
8078                         }
8079                 }
8080         }
8081
8082         // generate ushort elements array if possible
8083         if (loadmodel->surfmesh.data_element3s)
8084                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8085                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8086 }
8087
8088 // Valve BSP loader
8089 // Cloudwalk: Wasn't sober when I wrote this. I screamed and ran away at the face loader
8090 void Mod_VBSP_Load(model_t *mod, void *buffer, void *bufferend)
8091 {
8092         static cvar_t *testing = NULL; // TEMPORARY
8093         int i;
8094         sizebuf_t sb;
8095         sizebuf_t lumpsb[HL2HEADER_LUMPS];
8096
8097         if(!testing || !testing->integer)
8098         {
8099                 if(!testing)
8100                         testing = Cvar_Get(&cvars_all, "mod_bsp_vbsptest", "0", CF_CLIENT | CF_SERVER, "uhhh");
8101                 Host_Error("Mod_VBSP_Load: not yet fully implemented. Change the now-generated \"mod_bsp_vbsptest\" to 1 if you wish to test this");
8102         }
8103         else
8104         {
8105
8106                 MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
8107
8108                 mod->type = mod_brushhl2;
8109
8110                 MSG_ReadLittleLong(&sb);
8111                 MSG_ReadLittleLong(&sb); // TODO version check
8112
8113                 mod->modeldatatypestring = "VBSP";
8114
8115                 // read lumps
8116                 for (i = 0; i < HL2HEADER_LUMPS; i++)
8117                 {
8118                         int offset = MSG_ReadLittleLong(&sb);
8119                         int size = MSG_ReadLittleLong(&sb);
8120                         MSG_ReadLittleLong(&sb); // TODO support version
8121                         MSG_ReadLittleLong(&sb); // TODO support ident
8122                         if (offset < 0 || offset + size > sb.cursize)
8123                                 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);
8124                         MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
8125                 }
8126
8127                 MSG_ReadLittleLong(&sb); // TODO support revision field
8128
8129                 mod->soundfromcenter = true;
8130                 mod->TraceBox = Mod_CollisionBIH_TraceBox;
8131                 mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
8132                 mod->TraceLine = Mod_CollisionBIH_TraceLine;
8133                 mod->TracePoint = Mod_CollisionBIH_TracePoint;
8134                 mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
8135                 mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8136                 mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight; // probably not correct
8137                 mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents; // probably not correct
8138                 mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents; // probably not correct
8139                 mod->brush.GetPVS = Mod_BSP_GetPVS;
8140                 mod->brush.FatPVS = Mod_BSP_FatPVS;
8141                 mod->brush.BoxTouchingPVS = Mod_BSP_BoxTouchingPVS;
8142                 mod->brush.BoxTouchingLeafPVS = Mod_BSP_BoxTouchingLeafPVS;
8143                 mod->brush.BoxTouchingVisibleLeafs = Mod_BSP_BoxTouchingVisibleLeafs;
8144                 mod->brush.FindBoxClusters = Mod_BSP_FindBoxClusters;
8145                 mod->brush.LightPoint = Mod_Q3BSP_LightPoint; // probably not correct
8146                 mod->brush.FindNonSolidLocation = Mod_BSP_FindNonSolidLocation;
8147                 mod->brush.AmbientSoundLevelsForPoint = NULL;
8148                 mod->brush.RoundUpToHullSize = NULL;
8149                 mod->brush.PointInLeaf = Mod_BSP_PointInLeaf;
8150                 mod->Draw = R_Mod_Draw;
8151                 mod->DrawDepth = R_Mod_DrawDepth;
8152                 mod->DrawDebug = R_Mod_DrawDebug;
8153                 mod->DrawPrepass = R_Mod_DrawPrepass;
8154                 mod->GetLightInfo = R_Mod_GetLightInfo;
8155                 mod->CompileShadowMap = R_Mod_CompileShadowMap;
8156                 mod->DrawShadowMap = R_Mod_DrawShadowMap;
8157                 mod->DrawLight = R_Mod_DrawLight;
8158
8159                 // allocate a texture pool if we need it
8160                 if (mod->texturepool == NULL)
8161                         mod->texturepool = R_AllocTexturePool();
8162
8163                 Mod_VBSP_LoadEntities(&lumpsb[HL2LUMP_ENTITIES]);
8164                 Mod_VBSP_LoadVertexes(&lumpsb[HL2LUMP_VERTEXES]);
8165                 Mod_VBSP_LoadEdges(&lumpsb[HL2LUMP_EDGES]);
8166                 Mod_VBSP_LoadSurfedges(&lumpsb[HL2LUMP_SURFEDGES]);
8167                 Mod_VBSP_LoadTextures(&lumpsb[HL2LUMP_TEXDATA/*?*/]);
8168                 //Mod_VBSP_LoadLighting(&lumpsb[HL2LUMP_LIGHTING]);
8169                 Mod_VBSP_LoadPlanes(&lumpsb[HL2LUMP_PLANES]);
8170                 Mod_VBSP_LoadTexinfo(&lumpsb[HL2LUMP_TEXINFO]);
8171
8172                 // AHHHHHHH
8173                 Mod_VBSP_LoadFaces(&lumpsb[HL2LUMP_FACES]);
8174         }
8175 }
8176
8177 void Mod_MAP_Load(model_t *mod, void *buffer, void *bufferend)
8178 {
8179         Host_Error("Mod_MAP_Load: not yet implemented");
8180 }
8181
8182 typedef struct objvertex_s
8183 {
8184         int nextindex;
8185         int submodelindex;
8186         int textureindex;
8187         float v[3];
8188         float vt[2];
8189         float vn[3];
8190 }
8191 objvertex_t;
8192
8193 static unsigned char nobsp_pvs[1] = {1};
8194
8195 void Mod_OBJ_Load(model_t *mod, void *buffer, void *bufferend)
8196 {
8197         const char *textbase = (char *)buffer, *text = textbase;
8198         char *s;
8199         char *argv[512];
8200         char line[1024];
8201         char materialname[MAX_QPATH];
8202         int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
8203         int index1, index2, index3;
8204         objvertex_t vfirst, vprev, vcurrent;
8205         int argc;
8206         int linelen;
8207         int numtriangles = 0;
8208         int maxtriangles = 0;
8209         objvertex_t *vertices = NULL;
8210         int linenumber = 0;
8211         int maxtextures = 0, numtextures = 0, textureindex = 0;
8212         int maxv = 0, numv = 1;
8213         int maxvt = 0, numvt = 1;
8214         int maxvn = 0, numvn = 1;
8215         char *texturenames = NULL;
8216         float dist, modelradius, modelyawradius, yawradius;
8217         float *obj_v = NULL;
8218         float *obj_vt = NULL;
8219         float *obj_vn = NULL;
8220         float mins[3];
8221         float maxs[3];
8222         float corner[3];
8223         objvertex_t *thisvertex = NULL;
8224         int vertexhashindex;
8225         int *vertexhashtable = NULL;
8226         objvertex_t *vertexhashdata = NULL;
8227         objvertex_t *vdata = NULL;
8228         int vertexhashsize = 0;
8229         int vertexhashcount = 0;
8230         skinfile_t *skinfiles = NULL;
8231         unsigned char *data = NULL;
8232         int *submodelfirstsurface;
8233         msurface_t *tempsurface;
8234         msurface_t *tempsurfaces;
8235
8236         memset(&vfirst, 0, sizeof(vfirst));
8237         memset(&vprev, 0, sizeof(vprev));
8238         memset(&vcurrent, 0, sizeof(vcurrent));
8239
8240         dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
8241
8242         loadmodel->modeldatatypestring = "OBJ";
8243
8244         loadmodel->type = mod_obj;
8245         loadmodel->soundfromcenter = true;
8246         loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
8247         loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
8248         loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
8249         loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
8250         loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
8251         loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
8252         loadmodel->brush.TraceLineOfSight = NULL;
8253         loadmodel->brush.SuperContentsFromNativeContents = NULL;
8254         loadmodel->brush.NativeContentsFromSuperContents = NULL;
8255         loadmodel->brush.GetPVS = NULL;
8256         loadmodel->brush.FatPVS = NULL;
8257         loadmodel->brush.BoxTouchingPVS = NULL;
8258         loadmodel->brush.BoxTouchingLeafPVS = NULL;
8259         loadmodel->brush.BoxTouchingVisibleLeafs = NULL;
8260         loadmodel->brush.FindBoxClusters = NULL;
8261         loadmodel->brush.LightPoint = NULL;
8262         loadmodel->brush.FindNonSolidLocation = NULL;
8263         loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
8264         loadmodel->brush.RoundUpToHullSize = NULL;
8265         loadmodel->brush.PointInLeaf = NULL;
8266         loadmodel->Draw = R_Mod_Draw;
8267         loadmodel->DrawDepth = R_Mod_DrawDepth;
8268         loadmodel->DrawDebug = R_Mod_DrawDebug;
8269         loadmodel->DrawPrepass = R_Mod_DrawPrepass;
8270         loadmodel->GetLightInfo = R_Mod_GetLightInfo;
8271         loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
8272         loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
8273         loadmodel->DrawLight = R_Mod_DrawLight;
8274
8275         skinfiles = Mod_LoadSkinFiles();
8276         if (loadmodel->numskins < 1)
8277                 loadmodel->numskins = 1;
8278
8279         // make skinscenes for the skins (no groups)
8280         loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
8281         for (i = 0;i < loadmodel->numskins;i++)
8282         {
8283                 loadmodel->skinscenes[i].firstframe = i;
8284                 loadmodel->skinscenes[i].framecount = 1;
8285                 loadmodel->skinscenes[i].loop = true;
8286                 loadmodel->skinscenes[i].framerate = 10;
8287         }
8288
8289         VectorClear(mins);
8290         VectorClear(maxs);
8291
8292         // we always have model 0, i.e. the first "submodel"
8293         loadmodel->brush.numsubmodels = 1;
8294
8295         // parse the OBJ text now
8296         for(;;)
8297         {
8298                 static char emptyarg[1] = "";
8299                 if (!*text)
8300                         break;
8301                 linenumber++;
8302                 linelen = 0;
8303                 for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
8304                         line[linelen] = text[linelen];
8305                 line[linelen] = 0;
8306                 for (argc = 0;argc < 4;argc++)
8307                         argv[argc] = emptyarg;
8308                 argc = 0;
8309                 s = line;
8310                 while (*s == ' ' || *s == '\t')
8311                         s++;
8312                 while (*s)
8313                 {
8314                         argv[argc++] = s;
8315                         while (*s > ' ')
8316                                 s++;
8317                         if (!*s)
8318                                 break;
8319                         *s++ = 0;
8320                         while (*s == ' ' || *s == '\t')
8321                                 s++;
8322                 }
8323                 text += linelen;
8324                 if (*text == '\r')
8325                         text++;
8326                 if (*text == '\n')
8327                         text++;
8328                 if (!argc)
8329                         continue;
8330                 if (argv[0][0] == '#')
8331                         continue;
8332                 if (!strcmp(argv[0], "v"))
8333                 {
8334                         if (maxv <= numv)
8335                         {
8336                                 maxv = max(maxv * 2, 1024);
8337                                 obj_v = (float *)Mem_Realloc(tempmempool, obj_v, maxv * sizeof(float[3]));
8338                         }
8339                         if(mod_obj_orientation.integer)
8340                         {
8341                                 obj_v[numv*3+0] = atof(argv[1]);
8342                                 obj_v[numv*3+2] = atof(argv[2]);
8343                                 obj_v[numv*3+1] = atof(argv[3]);
8344                         }
8345                         else
8346                         {
8347                                 obj_v[numv*3+0] = atof(argv[1]);
8348                                 obj_v[numv*3+1] = atof(argv[2]);
8349                                 obj_v[numv*3+2] = atof(argv[3]);
8350                         }
8351                         numv++;
8352                 }
8353                 else if (!strcmp(argv[0], "vt"))
8354                 {
8355                         if (maxvt <= numvt)
8356                         {
8357                                 maxvt = max(maxvt * 2, 1024);
8358                                 obj_vt = (float *)Mem_Realloc(tempmempool, obj_vt, maxvt * sizeof(float[2]));
8359                         }
8360                         obj_vt[numvt*2+0] = atof(argv[1]);
8361                         obj_vt[numvt*2+1] = 1-atof(argv[2]);
8362                         numvt++;
8363                 }
8364                 else if (!strcmp(argv[0], "vn"))
8365                 {
8366                         if (maxvn <= numvn)
8367                         {
8368                                 maxvn = max(maxvn * 2, 1024);
8369                                 obj_vn = (float *)Mem_Realloc(tempmempool, obj_vn, maxvn * sizeof(float[3]));
8370                         }
8371                         if(mod_obj_orientation.integer)
8372                         {
8373                                 obj_vn[numvn*3+0] = atof(argv[1]);
8374                                 obj_vn[numvn*3+2] = atof(argv[2]);
8375                                 obj_vn[numvn*3+1] = atof(argv[3]);
8376                         }
8377                         else
8378                         {
8379                                 obj_vn[numvn*3+0] = atof(argv[1]);
8380                                 obj_vn[numvn*3+1] = atof(argv[2]);
8381                                 obj_vn[numvn*3+2] = atof(argv[3]);
8382                         }
8383                         numvn++;
8384                 }
8385                 else if (!strcmp(argv[0], "f"))
8386                 {
8387                         if (!numtextures)
8388                         {
8389                                 if (maxtextures <= numtextures)
8390                                 {
8391                                         maxtextures = max(maxtextures * 2, 256);
8392                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8393                                 }
8394                                 textureindex = numtextures++;
8395                                 strlcpy(texturenames + textureindex*MAX_QPATH, loadmodel->name, MAX_QPATH);
8396                         }
8397                         for (j = 1;j < argc;j++)
8398                         {
8399                                 index1 = atoi(argv[j]);
8400                                 while(argv[j][0] && argv[j][0] != '/')
8401                                         argv[j]++;
8402                                 if (argv[j][0])
8403                                         argv[j]++;
8404                                 index2 = atoi(argv[j]);
8405                                 while(argv[j][0] && argv[j][0] != '/')
8406                                         argv[j]++;
8407                                 if (argv[j][0])
8408                                         argv[j]++;
8409                                 index3 = atoi(argv[j]);
8410                                 // negative refers to a recent vertex
8411                                 // zero means not specified
8412                                 // positive means an absolute vertex index
8413                                 if (index1 < 0)
8414                                         index1 = numv - index1;
8415                                 if (index2 < 0)
8416                                         index2 = numvt - index2;
8417                                 if (index3 < 0)
8418                                         index3 = numvn - index3;
8419                                 vcurrent.nextindex = -1;
8420                                 vcurrent.textureindex = textureindex;
8421                                 vcurrent.submodelindex = submodelindex;
8422                                 if (obj_v && index1 >= 0 && index1 < numv)
8423                                         VectorCopy(obj_v + 3*index1, vcurrent.v);
8424                                 if (obj_vt && index2 >= 0 && index2 < numvt)
8425                                         Vector2Copy(obj_vt + 2*index2, vcurrent.vt);
8426                                 if (obj_vn && index3 >= 0 && index3 < numvn)
8427                                         VectorCopy(obj_vn + 3*index3, vcurrent.vn);
8428                                 if (numtriangles == 0)
8429                                 {
8430                                         VectorCopy(vcurrent.v, mins);
8431                                         VectorCopy(vcurrent.v, maxs);
8432                                 }
8433                                 else
8434                                 {
8435                                         mins[0] = min(mins[0], vcurrent.v[0]);
8436                                         mins[1] = min(mins[1], vcurrent.v[1]);
8437                                         mins[2] = min(mins[2], vcurrent.v[2]);
8438                                         maxs[0] = max(maxs[0], vcurrent.v[0]);
8439                                         maxs[1] = max(maxs[1], vcurrent.v[1]);
8440                                         maxs[2] = max(maxs[2], vcurrent.v[2]);
8441                                 }
8442                                 if (j == 1)
8443                                         vfirst = vcurrent;
8444                                 else if (j >= 3)
8445                                 {
8446                                         if (maxtriangles <= numtriangles)
8447                                         {
8448                                                 maxtriangles = max(maxtriangles * 2, 32768);
8449                                                 vertices = (objvertex_t*)Mem_Realloc(loadmodel->mempool, vertices, maxtriangles * sizeof(objvertex_t[3]));
8450                                         }
8451                                         if(mod_obj_orientation.integer)
8452                                         {
8453                                                 vertices[numtriangles*3+0] = vfirst;
8454                                                 vertices[numtriangles*3+1] = vprev;
8455                                                 vertices[numtriangles*3+2] = vcurrent;
8456                                         }
8457                                         else
8458                                         {
8459                                                 vertices[numtriangles*3+0] = vfirst;
8460                                                 vertices[numtriangles*3+2] = vprev;
8461                                                 vertices[numtriangles*3+1] = vcurrent;
8462                                         }
8463                                         numtriangles++;
8464                                 }
8465                                 vprev = vcurrent;
8466                         }
8467                 }
8468                 else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
8469                 {
8470                         submodelindex = atof(argv[1]);
8471                         loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
8472                 }
8473                 else if (!strcmp(argv[0], "usemtl"))
8474                 {
8475                         for (i = 0;i < numtextures;i++)
8476                                 if (!strcmp(texturenames+i*MAX_QPATH, argv[1]))
8477                                         break;
8478                         if (i < numtextures)
8479                                 textureindex = i;
8480                         else
8481                         {
8482                                 if (maxtextures <= numtextures)
8483                                 {
8484                                         maxtextures = max(maxtextures * 2, 256);
8485                                         texturenames = (char *)Mem_Realloc(loadmodel->mempool, texturenames, maxtextures * MAX_QPATH);
8486                                 }
8487                                 textureindex = numtextures++;
8488                                 strlcpy(texturenames + textureindex*MAX_QPATH, argv[1], MAX_QPATH);
8489                         }
8490                 }
8491         }
8492
8493         // now that we have the OBJ data loaded as-is, we can convert it
8494
8495         // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
8496         VectorCopy(mins, loadmodel->normalmins);
8497         VectorCopy(maxs, loadmodel->normalmaxs);
8498         dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
8499         modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
8500         modelyawradius = dist*dist+modelyawradius*modelyawradius;
8501         modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
8502         modelradius = modelyawradius + modelradius * modelradius;
8503         modelyawradius = sqrt(modelyawradius);
8504         modelradius = sqrt(modelradius);
8505         loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
8506         loadmodel->yawmins[2] = loadmodel->normalmins[2];
8507         loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
8508         loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
8509         loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
8510         loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
8511         loadmodel->radius = modelradius;
8512         loadmodel->radius2 = modelradius * modelradius;
8513
8514         // allocate storage for triangles
8515         loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
8516         // allocate vertex hash structures to build an optimal vertex subset
8517         vertexhashsize = numtriangles*2;
8518         vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
8519         memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
8520         vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
8521         vertexhashcount = 0;
8522
8523         // gather surface stats for assigning vertex/triangle ranges
8524         firstvertex = 0;
8525         firsttriangle = 0;
8526         elementindex = 0;
8527         loadmodel->num_surfaces = 0;
8528         // allocate storage for the worst case number of surfaces, later we resize
8529         tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
8530         submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
8531         tempsurface = tempsurfaces;
8532         for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
8533         {
8534                 submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8535                 for (textureindex = 0;textureindex < numtextures;textureindex++)
8536                 {
8537                         for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
8538                         {
8539                                 thisvertex = vertices + vertexindex;
8540                                 if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
8541                                         break;
8542                         }
8543                         // skip the surface creation if there are no triangles for it
8544                         if (vertexindex == numtriangles*3)
8545                                 continue;
8546                         // create a surface for these vertices
8547                         surfacevertices = 0;
8548                         surfaceelements = 0;
8549                         // we hack in a texture index in the surface to be fixed up later...
8550                         tempsurface->texture = (texture_t *)((size_t)textureindex);
8551                         // calculate bounds as we go
8552                         VectorCopy(thisvertex->v, tempsurface->mins);
8553                         VectorCopy(thisvertex->v, tempsurface->maxs);
8554                         for (;vertexindex < numtriangles*3;vertexindex++)
8555                         {
8556                                 thisvertex = vertices + vertexindex;
8557                                 if (thisvertex->submodelindex != submodelindex)
8558                                         continue;
8559                                 if (thisvertex->textureindex != textureindex)
8560                                         continue;
8561                                 // add vertex to surface bounds
8562                                 tempsurface->mins[0] = min(tempsurface->mins[0], thisvertex->v[0]);
8563                                 tempsurface->mins[1] = min(tempsurface->mins[1], thisvertex->v[1]);
8564                                 tempsurface->mins[2] = min(tempsurface->mins[2], thisvertex->v[2]);
8565                                 tempsurface->maxs[0] = max(tempsurface->maxs[0], thisvertex->v[0]);
8566                                 tempsurface->maxs[1] = max(tempsurface->maxs[1], thisvertex->v[1]);
8567                                 tempsurface->maxs[2] = max(tempsurface->maxs[2], thisvertex->v[2]);
8568                                 // add the vertex if it is not found in the merged set, and
8569                                 // get its index (triangle element) for the surface
8570                                 vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
8571                                 for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
8572                                 {
8573                                         vdata = vertexhashdata + i;
8574                                         if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
8575                                                 break;
8576                                 }
8577                                 if (i < 0)
8578                                 {
8579                                         i = vertexhashcount++;
8580                                         vdata = vertexhashdata + i;
8581                                         *vdata = *thisvertex;
8582                                         vdata->nextindex = vertexhashtable[vertexhashindex];
8583                                         vertexhashtable[vertexhashindex] = i;
8584                                         surfacevertices++;
8585                                 }
8586                                 loadmodel->surfmesh.data_element3i[elementindex++] = i;
8587                                 surfaceelements++;
8588                         }
8589                         surfacetriangles = surfaceelements / 3;
8590                         tempsurface->num_vertices = surfacevertices;
8591                         tempsurface->num_triangles = surfacetriangles;
8592                         tempsurface->num_firstvertex = firstvertex;
8593                         tempsurface->num_firsttriangle = firsttriangle;
8594                         firstvertex += tempsurface->num_vertices;
8595                         firsttriangle += tempsurface->num_triangles;
8596                         tempsurface++;
8597                         loadmodel->num_surfaces++;
8598                 }
8599         }
8600         submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
8601         numvertices = firstvertex;
8602         loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
8603         tempsurfaces = NULL;
8604
8605         // allocate storage for final mesh data
8606         loadmodel->num_textures = numtextures * loadmodel->numskins;
8607         loadmodel->num_texturesperskin = numtextures;
8608         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 *));
8609         loadmodel->brush.submodels = (model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(model_t *);
8610         loadmodel->modelsurfaces_sorted = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
8611         loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
8612         loadmodel->surfmesh.num_vertices = numvertices;
8613         loadmodel->surfmesh.num_triangles = numtriangles;
8614         loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
8615         loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
8616         loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
8617         loadmodel->surfmesh.data_normal3f = (float *)data;data += numvertices * sizeof(float[3]);
8618         loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += numvertices * sizeof(float[2]);
8619
8620         if (loadmodel->surfmesh.num_vertices <= 65536) {
8621                 loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
8622         }
8623
8624         for (j = 0;j < loadmodel->surfmesh.num_vertices;j++)
8625         {
8626                 VectorCopy(vertexhashdata[j].v, loadmodel->surfmesh.data_vertex3f + 3*j);
8627                 VectorCopy(vertexhashdata[j].vn, loadmodel->surfmesh.data_normal3f + 3*j);
8628                 Vector2Copy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
8629         }
8630
8631         // load the textures
8632         for (textureindex = 0;textureindex < numtextures;textureindex++)
8633                 Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
8634         Mod_FreeSkinFiles(skinfiles);
8635
8636         // set the surface textures to their real values now that we loaded them...
8637         for (i = 0;i < loadmodel->num_surfaces;i++)
8638                 loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
8639
8640         // free data
8641         Mem_Free(vertices);
8642         Mem_Free(texturenames);
8643         Mem_Free(obj_v);
8644         Mem_Free(obj_vt);
8645         Mem_Free(obj_vn);
8646         Mem_Free(vertexhashtable);
8647         Mem_Free(vertexhashdata);
8648
8649         // compute all the mesh information that was not loaded from the file
8650         if (loadmodel->surfmesh.data_element3s)
8651                 for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
8652                         loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
8653         Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
8654         // generate normals if the file did not have them
8655         if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
8656                 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);
8657         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);
8658
8659         // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
8660         loadmodel->brush.num_visleafs = 1;
8661         loadmodel->brush.num_leafs = 1;
8662         loadmodel->brush.num_nodes = 0;
8663         loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
8664         loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
8665         loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
8666         loadmodel->brush.num_pvsclusters = 1;
8667         loadmodel->brush.num_pvsclusterbytes = 1;
8668         loadmodel->brush.data_pvsclusters = nobsp_pvs;
8669         //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
8670         //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
8671         loadmodel->brush.data_leafsurfaces = loadmodel->modelsurfaces_sorted;
8672         VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
8673         VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
8674         loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
8675         loadmodel->brush.data_leafs->clusterindex = 0;
8676         loadmodel->brush.data_leafs->areaindex = 0;
8677         loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
8678         loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
8679         loadmodel->brush.data_leafs->numleafbrushes = 0;
8680         loadmodel->brush.data_leafs->firstleafbrush = NULL;
8681         loadmodel->brush.supportwateralpha = true;
8682
8683         if (loadmodel->brush.numsubmodels)
8684                 loadmodel->brush.submodels = (model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(model_t *));
8685
8686         mod = loadmodel;
8687         for (i = 0;i < loadmodel->brush.numsubmodels;i++)
8688         {
8689                 if (i > 0)
8690                 {
8691                         char name[10];
8692                         // duplicate the basic information
8693                         dpsnprintf(name, sizeof(name), "*%i", i);
8694                         mod = Mod_FindName(name, loadmodel->name);
8695                         // copy the base model to this one
8696                         *mod = *loadmodel;
8697                         // rename the clone back to its proper name
8698                         strlcpy(mod->name, name, sizeof(mod->name));
8699                         mod->brush.parentmodel = loadmodel;
8700                         // textures and memory belong to the main model
8701                         mod->texturepool = NULL;
8702                         mod->mempool = NULL;
8703                         mod->brush.GetPVS = NULL;
8704                         mod->brush.FatPVS = NULL;
8705                         mod->brush.BoxTouchingPVS = NULL;
8706                         mod->brush.BoxTouchingLeafPVS = NULL;
8707                         mod->brush.BoxTouchingVisibleLeafs = NULL;
8708                         mod->brush.FindBoxClusters = NULL;
8709                         mod->brush.LightPoint = NULL;
8710                         mod->brush.AmbientSoundLevelsForPoint = NULL;
8711                 }
8712                 mod->brush.submodel = i;
8713                 if (loadmodel->brush.submodels)
8714                         loadmodel->brush.submodels[i] = mod;
8715
8716                 // make the model surface list (used by shadowing/lighting)
8717                 mod->submodelsurfaces_start = submodelfirstsurface[i];
8718                 mod->submodelsurfaces_end = submodelfirstsurface[i+1];
8719                 mod->firstmodelbrush = 0;
8720                 mod->nummodelbrushes = 0;
8721
8722                 VectorClear(mod->normalmins);
8723                 VectorClear(mod->normalmaxs);
8724                 l = false;
8725                 for (j = mod->submodelsurfaces_start;j < mod->submodelsurfaces_end;j++)
8726                 {
8727                         const msurface_t *surface = mod->data_surfaces + j;
8728                         const float *v3f = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
8729                         int k;
8730                         if (!surface->num_vertices)
8731                                 continue;
8732                         if (!l)
8733                         {
8734                                 l = true;
8735                                 VectorCopy(v3f, mod->normalmins);
8736                                 VectorCopy(v3f, mod->normalmaxs);
8737                         }
8738                         for (k = 0;k < surface->num_vertices;k++, v3f += 3)
8739                         {
8740                                 mod->normalmins[0] = min(mod->normalmins[0], v3f[0]);
8741                                 mod->normalmins[1] = min(mod->normalmins[1], v3f[1]);
8742                                 mod->normalmins[2] = min(mod->normalmins[2], v3f[2]);
8743                                 mod->normalmaxs[0] = max(mod->normalmaxs[0], v3f[0]);
8744                                 mod->normalmaxs[1] = max(mod->normalmaxs[1], v3f[1]);
8745                                 mod->normalmaxs[2] = max(mod->normalmaxs[2], v3f[2]);
8746                         }
8747                 }
8748                 corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
8749                 corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
8750                 corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
8751                 modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
8752                 yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
8753                 mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
8754                 mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
8755                 mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
8756                 mod->yawmins[0] = mod->yawmins[1] = -yawradius;
8757                 mod->yawmins[2] = mod->normalmins[2];
8758                 mod->yawmaxs[2] = mod->normalmaxs[2];
8759                 mod->radius = modelradius;
8760                 mod->radius2 = modelradius * modelradius;
8761
8762                 Mod_SetDrawSkyAndWater(mod);
8763
8764                 Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
8765                 mod->render_bih = mod->collision_bih;
8766
8767                 // generate VBOs and other shared data before cloning submodels
8768                 if (i == 0)
8769                         Mod_BuildVBOs();
8770         }
8771         mod = loadmodel;
8772         Mem_Free(submodelfirstsurface);
8773
8774         // make the model surface list (used by shadowing/lighting)
8775         Mod_MakeSortedSurfaces(loadmodel);
8776
8777         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);
8778 }