model_shared.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 // models.c -- model loading and caching
  21
  22 // models are the only shared resource between a client and server running
  23 // on the same machine.
  24
  25 #include "quakedef.h"
  26 #include "image.h"
  27 #include "r_shadow.h"
  28
  29 cvar_t r_mipskins = {CVAR_SAVE, "r_mipskins", "0", "mipmaps model skins so they render faster in the distance and do not display noise artifacts, can cause discoloration of skins if they contain undesirable border colors"};
  30
  31 model_t *loadmodel;
  32
  33 static mempool_t *mod_mempool;
  34 static memexpandablearray_t models;
  35
  36 // FIXME: make this a memexpandablearray_t
  37 #define Q3SHADER_MAXSHADERS 16384
  38 static int q3shaders_numshaders = 0;
  39 static q3shaderinfo_t q3shaders_shaders[Q3SHADER_MAXSHADERS];
  40
  41 static void mod_start(void)
  42 {
  43         int i;
  44         int nummodels = Mem_ExpandableArray_IndexRange(&models);
  45         model_t *mod;
  46
  47         // parse the Q3 shader files
  48         Mod_LoadQ3Shaders();
  49
  50         for (i = 0;i < nummodels;i++)
  51                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*')
  52                         if (mod->used)
  53                                 Mod_LoadModel(mod, true, false, mod->isworldmodel);
  54 }
  55
  56 static void mod_shutdown(void)
  57 {
  58         int i;
  59         int nummodels = Mem_ExpandableArray_IndexRange(&models);
  60         model_t *mod;
  61
  62         for (i = 0;i < nummodels;i++)
  63                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && (mod->loaded || mod->mempool))
  64                         Mod_UnloadModel(mod);
  65 }
  66
  67 static void mod_newmap(void)
  68 {
  69         msurface_t *surface;
  70         int i, j, k, surfacenum, ssize, tsize;
  71         int nummodels = Mem_ExpandableArray_IndexRange(&models);
  72         model_t *mod;
  73
  74         R_SkinFrame_PrepareForPurge();
  75         for (i = 0;i < nummodels;i++)
  76         {
  77                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->mempool && mod->data_textures)
  78                 {
  79                         for (j = 0;j < mod->num_textures;j++)
  80                         {
  81                                 for (k = 0;k < mod->data_textures[j].numskinframes;k++)
  82                                         R_SkinFrame_MarkUsed(mod->data_textures[j].skinframes[k]);
  83                                 for (k = 0;k < mod->data_textures[j].backgroundnumskinframes;k++)
  84                                         R_SkinFrame_MarkUsed(mod->data_textures[j].backgroundskinframes[k]);
  85                         }
  86                 }
  87         }
  88         R_SkinFrame_Purge();
  89
  90         if (!cl_stainmaps_clearonload.integer)
  91                 return;
  92
  93         for (i = 0;i < nummodels;i++)
  94         {
  95                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->mempool && mod->data_surfaces)
  96                 {
  97                         for (surfacenum = 0, surface = mod->data_surfaces;surfacenum < mod->num_surfaces;surfacenum++, surface++)
  98                         {
  99                                 if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
 100                                 {
 101                                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
 102                                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
 103                                         memset(surface->lightmapinfo->stainsamples, 255, ssize * tsize * 3);
 104                                         surface->cached_dlight = true;
 105                                 }
 106                         }
 107                 }
 108         }
 109 }
 110
 111 /*
 112 ===============
 113 Mod_Init
 114 ===============
 115 */
 116 static void Mod_Print(void);
 117 static void Mod_Precache (void);
 118 static void Mod_BuildVBOs(void);
 119 void Mod_Init (void)
 120 {
 121         mod_mempool = Mem_AllocPool("modelinfo", 0, NULL);
 122         Mem_ExpandableArray_NewArray(&models, mod_mempool, sizeof(model_t), 16);
 123
 124         Mod_BrushInit();
 125         Mod_AliasInit();
 126         Mod_SpriteInit();
 127
 128         Cvar_RegisterVariable(&r_mipskins);
 129         Cmd_AddCommand ("modellist", Mod_Print, "prints a list of loaded models");
 130         Cmd_AddCommand ("modelprecache", Mod_Precache, "load a model");
 131 }
 132
 133 void Mod_RenderInit(void)
 134 {
 135         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 136 }
 137
 138 void Mod_UnloadModel (model_t *mod)
 139 {
 140         char name[MAX_QPATH];
 141         qboolean isworldmodel;
 142         qboolean used;
 143         strlcpy(name, mod->name, sizeof(name));
 144         isworldmodel = mod->isworldmodel;
 145         used = mod->used;
 146         if (mod->surfmesh.ebo)
 147                 R_Mesh_DestroyBufferObject(mod->surfmesh.ebo);
 148         if (mod->surfmesh.vbo)
 149                 R_Mesh_DestroyBufferObject(mod->surfmesh.vbo);
 150         // free textures/memory attached to the model
 151         R_FreeTexturePool(&mod->texturepool);
 152         Mem_FreePool(&mod->mempool);
 153         // clear the struct to make it available
 154         memset(mod, 0, sizeof(model_t));
 155         // restore the fields we want to preserve
 156         strlcpy(mod->name, name, sizeof(mod->name));
 157         mod->isworldmodel = isworldmodel;
 158         mod->used = used;
 159         mod->loaded = false;
 160 }
 161
 162 /*
 163 ==================
 164 Mod_LoadModel
 165
 166 Loads a model
 167 ==================
 168 */
 169 model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 170 {
 171         int num;
 172         unsigned int crc;
 173         void *buf;
 174         fs_offset_t filesize;
 175
 176         mod->used = true;
 177
 178         if (mod->name[0] == '*') // submodel
 179                 return mod;
 180
 181         crc = 0;
 182         buf = NULL;
 183
 184         // even if the model is loaded it still may need reloading...
 185
 186         // if the model is a worldmodel and is being referred to as a
 187         // non-worldmodel here, then it needs reloading to get rid of the
 188         // submodels
 189         if (mod->isworldmodel != isworldmodel)
 190                 mod->loaded = false;
 191
 192         // if it is not loaded or checkdisk is true we need to calculate the crc
 193         if (!mod->loaded || checkdisk)
 194         {
 195                 if (checkdisk && mod->loaded)
 196                         Con_DPrintf("checking model %s\n", mod->name);
 197                 buf = FS_LoadFile (mod->name, tempmempool, false, &filesize);
 198                 if (buf)
 199                 {
 200                         crc = CRC_Block((unsigned char *)buf, filesize);
 201                         // we need to reload the model if the crc does not match
 202                         if (mod->crc != crc)
 203                                 mod->loaded = false;
 204                 }
 205         }
 206
 207         // if the model is already loaded and checks passed, just return
 208         if (mod->loaded)
 209         {
 210                 if (buf)
 211                         Mem_Free(buf);
 212                 return mod;
 213         }
 214
 215         Con_DPrintf("loading model %s\n", mod->name);
 216         // LordHavoc: unload the existing model in this slot (if there is one)
 217         if (mod->loaded || mod->mempool)
 218                 Mod_UnloadModel(mod);
 219
 220         // load the model
 221         mod->isworldmodel = isworldmodel;
 222         mod->used = true;
 223         mod->crc = crc;
 224         // errors can prevent the corresponding mod->loaded = true;
 225         mod->loaded = false;
 226
 227         // default model radius and bounding box (mainly for missing models)
 228         mod->radius = 16;
 229         VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
 230         VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
 231         VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
 232         VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
 233         VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
 234         VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 235
 236         if (buf)
 237         {
 238                 char *bufend = (char *)buf + filesize;
 239
 240                 // all models use memory, so allocate a memory pool
 241                 mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 242
 243                 num = LittleLong(*((int *)buf));
 244                 // call the apropriate loader
 245                 loadmodel = mod;
 246                      if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf, bufend);
 247                 else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf, bufend);
 248                 else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf, bufend);
 249                 else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf, bufend);
 250                 else if (!memcmp(buf, "IDS2", 4)) Mod_IDS2_Load(mod, buf, bufend);
 251                 else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf, bufend);
 252                 else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf, bufend);
 253                 else if (!memcmp(buf, "DARKPLACESMODEL", 16)) Mod_DARKPLACESMODEL_Load(mod, buf, bufend);
 254                 else if (!memcmp(buf, "ACTRHEAD", 8)) Mod_PSKMODEL_Load(mod, buf, bufend);
 255                 else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf, bufend);
 256                 else if (!memcmp(buf, "MCBSPpad", 8)) Mod_Q1BSP_Load(mod, buf, bufend);
 257                 else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf, bufend);
 258                 else Con_Printf("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 259                 Mem_Free(buf);
 260
 261                 Mod_BuildVBOs();
 262
 263                 // no fatal errors occurred, so this model is ready to use.
 264                 mod->loaded = true;
 265         }
 266         else if (crash)
 267         {
 268                 // LordHavoc: Sys_Error was *ANNOYING*
 269                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 270         }
 271         return mod;
 272 }
 273
 274 void Mod_ClearUsed(void)
 275 {
 276         int i;
 277         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 278         model_t *mod;
 279         for (i = 0;i < nummodels;i++)
 280                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0])
 281                         mod->used = false;
 282 }
 283
 284 void Mod_PurgeUnused(void)
 285 {
 286         int i;
 287         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 288         model_t *mod;
 289         for (i = 0;i < nummodels;i++)
 290         {
 291                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && !mod->used)
 292                 {
 293                         Mod_UnloadModel(mod);
 294                         Mem_ExpandableArray_FreeRecord(&models, mod);
 295                 }
 296         }
 297 }
 298
 299 // only used during loading!
 300 void Mod_RemoveStaleWorldModels(model_t *skip)
 301 {
 302         int i;
 303         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 304         model_t *mod;
 305         for (i = 0;i < nummodels;i++)
 306         {
 307                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->isworldmodel && mod->loaded && skip != mod)
 308                 {
 309                         Mod_UnloadModel(mod);
 310                         mod->isworldmodel = false;
 311                         mod->used = false;
 312                 }
 313         }
 314 }
 315
 316 /*
 317 ==================
 318 Mod_FindName
 319
 320 ==================
 321 */
 322 model_t *Mod_FindName(const char *name)
 323 {
 324         int i;
 325         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 326         model_t *mod;
 327
 328         if (!name[0])
 329                 Host_Error ("Mod_ForName: NULL name");
 330
 331         // search the currently loaded models
 332         for (i = 0;i < nummodels;i++)
 333         {
 334                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && !strcmp(mod->name, name))
 335                 {
 336                         mod->used = true;
 337                         return mod;
 338                 }
 339         }
 340
 341         // no match found, create a new one
 342         mod = Mem_ExpandableArray_AllocRecord(&models);
 343         strlcpy(mod->name, name, sizeof(mod->name));
 344         mod->loaded = false;
 345         mod->used = true;
 346         return mod;
 347 }
 348
 349 /*
 350 ==================
 351 Mod_ForName
 352
 353 Loads in a model for the given name
 354 ==================
 355 */
 356 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 357 {
 358         model_t *model;
 359         model = Mod_FindName(name);
 360         if (model->name[0] != '*' && (!model->loaded || checkdisk))
 361                 Mod_LoadModel(model, crash, checkdisk, isworldmodel);
 362         return model;
 363 }
 364
 365 /*
 366 ==================
 367 Mod_Reload
 368
 369 Reloads all models if they have changed
 370 ==================
 371 */
 372 void Mod_Reload(void)
 373 {
 374         int i;
 375         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 376         model_t *mod;
 377         for (i = 0;i < nummodels;i++)
 378                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*' && mod->used)
 379                         Mod_LoadModel(mod, true, true, mod->isworldmodel);
 380 }
 381
 382 unsigned char *mod_base;
 383
 384
 385 //=============================================================================
 386
 387 /*
 388 ================
 389 Mod_Print
 390 ================
 391 */
 392 static void Mod_Print(void)
 393 {
 394         int i;
 395         int nummodels = Mem_ExpandableArray_IndexRange(&models);
 396         model_t *mod;
 397
 398         Con_Print("Loaded models:\n");
 399         for (i = 0;i < nummodels;i++)
 400                 if ((mod = Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0])
 401                         Con_Printf("%4iK %s\n", mod->mempool ? (int)((mod->mempool->totalsize + 1023) / 1024) : 0, mod->name);
 402 }
 403
 404 /*
 405 ================
 406 Mod_Precache
 407 ================
 408 */
 409 static void Mod_Precache(void)
 410 {
 411         if (Cmd_Argc() == 2)
 412                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 413         else
 414                 Con_Print("usage: modelprecache <filename>\n");
 415 }
 416
 417 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 418 {
 419         int i, count;
 420         unsigned char *used;
 421         used = (unsigned char *)Mem_Alloc(tempmempool, numvertices);
 422         memset(used, 0, numvertices);
 423         for (i = 0;i < numelements;i++)
 424                 used[elements[i]] = 1;
 425         for (i = 0, count = 0;i < numvertices;i++)
 426                 remapvertices[i] = used[i] ? count++ : -1;
 427         Mem_Free(used);
 428         return count;
 429 }
 430
 431 #if 1
 432 // fast way, using an edge hash
 433 #define TRIANGLEEDGEHASH 8192
 434 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 435 {
 436         int i, j, p, e1, e2, *n, hashindex, count, match;
 437         const int *e;
 438         typedef struct edgehashentry_s
 439         {
 440                 struct edgehashentry_s *next;
 441                 int triangle;
 442                 int element[2];
 443         }
 444         edgehashentry_t;
 445         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 446         memset(edgehash, 0, sizeof(edgehash));
 447         edgehashentries = edgehashentriesbuffer;
 448         // if there are too many triangles for the stack array, allocate larger buffer
 449         if (numtriangles > TRIANGLEEDGEHASH)
 450                 edgehashentries = (edgehashentry_t *)Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 451         // find neighboring triangles
 452         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 453         {
 454                 for (j = 0, p = 2;j < 3;p = j, j++)
 455                 {
 456                         e1 = e[p];
 457                         e2 = e[j];
 458                         // this hash index works for both forward and backward edges
 459                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 460                         hash = edgehashentries + i * 3 + j;
 461                         hash->next = edgehash[hashindex];
 462                         edgehash[hashindex] = hash;
 463                         hash->triangle = i;
 464                         hash->element[0] = e1;
 465                         hash->element[1] = e2;
 466                 }
 467         }
 468         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 469         {
 470                 for (j = 0, p = 2;j < 3;p = j, j++)
 471                 {
 472                         e1 = e[p];
 473                         e2 = e[j];
 474                         // this hash index works for both forward and backward edges
 475                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 476                         count = 0;
 477                         match = -1;
 478                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 479                         {
 480                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 481                                 {
 482                                         if (hash->triangle != i)
 483                                                 match = hash->triangle;
 484                                         count++;
 485                                 }
 486                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 487                                         count++;
 488                         }
 489                         // detect edges shared by three triangles and make them seams
 490                         if (count > 2)
 491                                 match = -1;
 492                         n[p] = match;
 493                 }
 494         }
 495         // free the allocated buffer
 496         if (edgehashentries != edgehashentriesbuffer)
 497                 Mem_Free(edgehashentries);
 498 }
 499 #else
 500 // very slow but simple way
 501 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 502 {
 503         int i, match, count;
 504         count = 0;
 505         match = -1;
 506         for (i = 0;i < numtriangles;i++, elements += 3)
 507         {
 508                      if ((elements[0] == start && elements[1] == end)
 509                       || (elements[1] == start && elements[2] == end)
 510                       || (elements[2] == start && elements[0] == end))
 511                 {
 512                         if (i != ignore)
 513                                 match = i;
 514                         count++;
 515                 }
 516                 else if ((elements[1] == start && elements[0] == end)
 517                       || (elements[2] == start && elements[1] == end)
 518                       || (elements[0] == start && elements[2] == end))
 519                         count++;
 520         }
 521         // detect edges shared by three triangles and make them seams
 522         if (count > 2)
 523                 match = -1;
 524         return match;
 525 }
 526
 527 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 528 {
 529         int i, *n;
 530         const int *e;
 531         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 532         {
 533                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 534                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 535                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 536         }
 537 }
 538 #endif
 539
 540 void Mod_ValidateElements(int *elements, int numtriangles, int firstvertex, int numverts, const char *filename, int fileline)
 541 {
 542         int i, warned = false, endvertex = firstvertex + numverts;
 543         for (i = 0;i < numtriangles * 3;i++)
 544         {
 545                 if (elements[i] < firstvertex || elements[i] >= endvertex)
 546                 {
 547                         if (!warned)
 548                         {
 549                                 warned = true;
 550                                 Con_Printf("Mod_ValidateElements: out of bounds elements detected at %s:%d\n", filename, fileline);
 551                         }
 552                         elements[i] = firstvertex;
 553                 }
 554         }
 555 }
 556
 557 // warning: this is an expensive function!
 558 void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting)
 559 {
 560         int i, j;
 561         const int *element;
 562         float *vectorNormal;
 563         float areaNormal[3];
 564         // clear the vectors
 565         memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 566         // process each vertex of each triangle and accumulate the results
 567         // use area-averaging, to make triangles with a big area have a bigger
 568         // weighting on the vertex normal than triangles with a small area
 569         // to do so, just add the 'normals' together (the bigger the area
 570         // the greater the length of the normal is
 571         element = elements;
 572         for (i = 0; i < numtriangles; i++, element += 3)
 573         {
 574                 TriangleNormal(
 575                         vertex3f + element[0] * 3,
 576                         vertex3f + element[1] * 3,
 577                         vertex3f + element[2] * 3,
 578                         areaNormal
 579                         );
 580
 581                 if (!areaweighting)
 582                         VectorNormalize(areaNormal);
 583
 584                 for (j = 0;j < 3;j++)
 585                 {
 586                         vectorNormal = normal3f + element[j] * 3;
 587                         vectorNormal[0] += areaNormal[0];
 588                         vectorNormal[1] += areaNormal[1];
 589                         vectorNormal[2] += areaNormal[2];
 590                 }
 591         }
 592         // and just normalize the accumulated vertex normal in the end
 593         vectorNormal = normal3f + 3 * firstvertex;
 594         for (i = 0; i < numvertices; i++, vectorNormal += 3)
 595                 VectorNormalize(vectorNormal);
 596 }
 597
 598 void Mod_BuildBumpVectors(const float *v0, const float *v1, const float *v2, const float *tc0, const float *tc1, const float *tc2, float *svector3f, float *tvector3f, float *normal3f)
 599 {
 600         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 601         // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 602         // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 603
 604         // 6 multiply, 9 subtract
 605         VectorSubtract(v1, v0, v10);
 606         VectorSubtract(v2, v0, v20);
 607         normal3f[0] = v20[1] * v10[2] - v20[2] * v10[1];
 608         normal3f[1] = v20[2] * v10[0] - v20[0] * v10[2];
 609         normal3f[2] = v20[0] * v10[1] - v20[1] * v10[0];
 610         // 12 multiply, 10 subtract
 611         tc10[1] = tc1[1] - tc0[1];
 612         tc20[1] = tc2[1] - tc0[1];
 613         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 614         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 615         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 616         tc10[0] = tc1[0] - tc0[0];
 617         tc20[0] = tc2[0] - tc0[0];
 618         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 619         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 620         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 621         // 12 multiply, 4 add, 6 subtract
 622         f = DotProduct(svector3f, normal3f);
 623         svector3f[0] -= f * normal3f[0];
 624         svector3f[1] -= f * normal3f[1];
 625         svector3f[2] -= f * normal3f[2];
 626         f = DotProduct(tvector3f, normal3f);
 627         tvector3f[0] -= f * normal3f[0];
 628         tvector3f[1] -= f * normal3f[1];
 629         tvector3f[2] -= f * normal3f[2];
 630         // if texture is mapped the wrong way (counterclockwise), the tangents
 631         // have to be flipped, this is detected by calculating a normal from the
 632         // two tangents, and seeing if it is opposite the surface normal
 633         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 634         CrossProduct(tvector3f, svector3f, tangentcross);
 635         if (DotProduct(tangentcross, normal3f) < 0)
 636         {
 637                 VectorNegate(svector3f, svector3f);
 638                 VectorNegate(tvector3f, tvector3f);
 639         }
 640 }
 641
 642 // warning: this is a very expensive function!
 643 void Mod_BuildTextureVectorsFromNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const float *texcoord2f, const float *normal3f, const int *elements, float *svector3f, float *tvector3f, qboolean areaweighting)
 644 {
 645         int i, tnum;
 646         float sdir[3], tdir[3], normal[3], *sv, *tv;
 647         const float *v0, *v1, *v2, *tc0, *tc1, *tc2, *n;
 648         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 649         const int *e;
 650         // clear the vectors
 651         memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 652         memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 653         // process each vertex of each triangle and accumulate the results
 654         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 655         {
 656                 v0 = vertex3f + e[0] * 3;
 657                 v1 = vertex3f + e[1] * 3;
 658                 v2 = vertex3f + e[2] * 3;
 659                 tc0 = texcoord2f + e[0] * 2;
 660                 tc1 = texcoord2f + e[1] * 2;
 661                 tc2 = texcoord2f + e[2] * 2;
 662
 663                 // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 664                 // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 665
 666                 // calculate the edge directions and surface normal
 667                 // 6 multiply, 9 subtract
 668                 VectorSubtract(v1, v0, v10);
 669                 VectorSubtract(v2, v0, v20);
 670                 normal[0] = v20[1] * v10[2] - v20[2] * v10[1];
 671                 normal[1] = v20[2] * v10[0] - v20[0] * v10[2];
 672                 normal[2] = v20[0] * v10[1] - v20[1] * v10[0];
 673
 674                 // calculate the tangents
 675                 // 12 multiply, 10 subtract
 676                 tc10[1] = tc1[1] - tc0[1];
 677                 tc20[1] = tc2[1] - tc0[1];
 678                 sdir[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 679                 sdir[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 680                 sdir[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 681                 tc10[0] = tc1[0] - tc0[0];
 682                 tc20[0] = tc2[0] - tc0[0];
 683                 tdir[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 684                 tdir[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 685                 tdir[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 686
 687                 // if texture is mapped the wrong way (counterclockwise), the tangents
 688                 // have to be flipped, this is detected by calculating a normal from the
 689                 // two tangents, and seeing if it is opposite the surface normal
 690                 // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 691                 CrossProduct(tdir, sdir, tangentcross);
 692                 if (DotProduct(tangentcross, normal) < 0)
 693                 {
 694                         VectorNegate(sdir, sdir);
 695                         VectorNegate(tdir, tdir);
 696                 }
 697
 698                 if (!areaweighting)
 699                 {
 700                         VectorNormalize(sdir);
 701                         VectorNormalize(tdir);
 702                 }
 703                 for (i = 0;i < 3;i++)
 704                 {
 705                         VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
 706                         VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
 707                 }
 708         }
 709         // make the tangents completely perpendicular to the surface normal, and
 710         // then normalize them
 711         // 16 assignments, 2 divide, 2 sqrt, 2 negates, 14 adds, 24 multiplies
 712         for (i = 0, sv = svector3f + 3 * firstvertex, tv = tvector3f + 3 * firstvertex, n = normal3f + 3 * firstvertex;i < numvertices;i++, sv += 3, tv += 3, n += 3)
 713         {
 714                 f = -DotProduct(sv, n);
 715                 VectorMA(sv, f, n, sv);
 716                 VectorNormalize(sv);
 717                 f = -DotProduct(tv, n);
 718                 VectorMA(tv, f, n, tv);
 719                 VectorNormalize(tv);
 720         }
 721 }
 722
 723 void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 724 {
 725         unsigned char *data;
 726         data = (unsigned char *)Mem_Alloc(mempool, numvertices * (3 + 3 + 3 + 3 + 2 + 2 + (vertexcolors ? 4 : 0)) * sizeof(float) + numvertices * (lightmapoffsets ? 1 : 0) * sizeof(int) + numtriangles * (3 + (neighbors ? 3 : 0)) * sizeof(int));
 727         loadmodel->surfmesh.num_vertices = numvertices;
 728         loadmodel->surfmesh.num_triangles = numtriangles;
 729         if (loadmodel->surfmesh.num_vertices)
 730         {
 731                 loadmodel->surfmesh.data_vertex3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 732                 loadmodel->surfmesh.data_svector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 733                 loadmodel->surfmesh.data_tvector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 734                 loadmodel->surfmesh.data_normal3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 735                 loadmodel->surfmesh.data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 736                 loadmodel->surfmesh.data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 737                 if (vertexcolors)
 738                         loadmodel->surfmesh.data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * loadmodel->surfmesh.num_vertices;
 739                 if (lightmapoffsets)
 740                         loadmodel->surfmesh.data_lightmapoffsets = (int *)data, data += sizeof(int) * loadmodel->surfmesh.num_vertices;
 741         }
 742         if (loadmodel->surfmesh.num_triangles)
 743         {
 744                 loadmodel->surfmesh.data_element3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 745                 if (neighbors)
 746                         loadmodel->surfmesh.data_neighbor3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 747         }
 748 }
 749
 750 shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable)
 751 {
 752         shadowmesh_t *newmesh;
 753         unsigned char *data;
 754         int size;
 755         size = sizeof(shadowmesh_t);
 756         size += maxverts * sizeof(float[3]);
 757         if (light)
 758                 size += maxverts * sizeof(float[11]);
 759         size += maxtriangles * sizeof(int[3]);
 760         if (neighbors)
 761                 size += maxtriangles * sizeof(int[3]);
 762         if (expandable)
 763                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 764         data = (unsigned char *)Mem_Alloc(mempool, size);
 765         newmesh = (shadowmesh_t *)data;data += sizeof(*newmesh);
 766         newmesh->map_diffuse = map_diffuse;
 767         newmesh->map_specular = map_specular;
 768         newmesh->map_normal = map_normal;
 769         newmesh->maxverts = maxverts;
 770         newmesh->maxtriangles = maxtriangles;
 771         newmesh->numverts = 0;
 772         newmesh->numtriangles = 0;
 773
 774         newmesh->vertex3f = (float *)data;data += maxverts * sizeof(float[3]);
 775         if (light)
 776         {
 777                 newmesh->svector3f = (float *)data;data += maxverts * sizeof(float[3]);
 778                 newmesh->tvector3f = (float *)data;data += maxverts * sizeof(float[3]);
 779                 newmesh->normal3f = (float *)data;data += maxverts * sizeof(float[3]);
 780                 newmesh->texcoord2f = (float *)data;data += maxverts * sizeof(float[2]);
 781         }
 782         newmesh->element3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 783         if (neighbors)
 784         {
 785                 newmesh->neighbor3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 786         }
 787         if (expandable)
 788         {
 789                 newmesh->vertexhashtable = (shadowmeshvertexhash_t **)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 790                 newmesh->vertexhashentries = (shadowmeshvertexhash_t *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 791         }
 792         return newmesh;
 793 }
 794
 795 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 796 {
 797         shadowmesh_t *newmesh;
 798         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 799         newmesh->numverts = oldmesh->numverts;
 800         newmesh->numtriangles = oldmesh->numtriangles;
 801
 802         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 803         if (newmesh->svector3f && oldmesh->svector3f)
 804         {
 805                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 806                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 807                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 808                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 809         }
 810         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 811         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 812                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 813         return newmesh;
 814 }
 815
 816 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 817 {
 818         int hashindex, vnum;
 819         shadowmeshvertexhash_t *hash;
 820         // this uses prime numbers intentionally
 821         hashindex = (unsigned int) (vertex14f[0] * 2003 + vertex14f[1] * 4001 + vertex14f[2] * 7919) % SHADOWMESHVERTEXHASH;
 822         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 823         {
 824                 vnum = (hash - mesh->vertexhashentries);
 825                 if ((mesh->vertex3f == NULL || (mesh->vertex3f[vnum * 3 + 0] == vertex14f[0] && mesh->vertex3f[vnum * 3 + 1] == vertex14f[1] && mesh->vertex3f[vnum * 3 + 2] == vertex14f[2]))
 826                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 827                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 828                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 829                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 830                         return hash - mesh->vertexhashentries;
 831         }
 832         vnum = mesh->numverts++;
 833         hash = mesh->vertexhashentries + vnum;
 834         hash->next = mesh->vertexhashtable[hashindex];
 835         mesh->vertexhashtable[hashindex] = hash;
 836         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 837         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 838         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 839         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 840         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 841         return vnum;
 842 }
 843
 844 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 845 {
 846         if (mesh->numtriangles == 0)
 847         {
 848                 // set the properties on this empty mesh to be more favorable...
 849                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 850                 mesh->map_diffuse = map_diffuse;
 851                 mesh->map_specular = map_specular;
 852                 mesh->map_normal = map_normal;
 853         }
 854         while (mesh->map_diffuse != map_diffuse || mesh->map_specular != map_specular || mesh->map_normal != map_normal || mesh->numverts + 3 > mesh->maxverts || mesh->numtriangles + 1 > mesh->maxtriangles)
 855         {
 856                 if (mesh->next == NULL)
 857                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxverts, 300), max(mesh->maxtriangles, 100), map_diffuse, map_specular, map_normal, mesh->svector3f != NULL, mesh->neighbor3i != NULL, true);
 858                 mesh = mesh->next;
 859         }
 860         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 861         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 862         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 863         mesh->numtriangles++;
 864 }
 865
 866 void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, const float *vertex3f, const float *svector3f, const float *tvector3f, const float *normal3f, const float *texcoord2f, int numtris, const int *element3i)
 867 {
 868         int i, j, e;
 869         float vbuf[3*14], *v;
 870         memset(vbuf, 0, sizeof(vbuf));
 871         for (i = 0;i < numtris;i++)
 872         {
 873                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 874                 {
 875                         e = *element3i++;
 876                         if (vertex3f)
 877                         {
 878                                 v[0] = vertex3f[e * 3 + 0];
 879                                 v[1] = vertex3f[e * 3 + 1];
 880                                 v[2] = vertex3f[e * 3 + 2];
 881                         }
 882                         if (svector3f)
 883                         {
 884                                 v[3] = svector3f[e * 3 + 0];
 885                                 v[4] = svector3f[e * 3 + 1];
 886                                 v[5] = svector3f[e * 3 + 2];
 887                         }
 888                         if (tvector3f)
 889                         {
 890                                 v[6] = tvector3f[e * 3 + 0];
 891                                 v[7] = tvector3f[e * 3 + 1];
 892                                 v[8] = tvector3f[e * 3 + 2];
 893                         }
 894                         if (normal3f)
 895                         {
 896                                 v[9] = normal3f[e * 3 + 0];
 897                                 v[10] = normal3f[e * 3 + 1];
 898                                 v[11] = normal3f[e * 3 + 2];
 899                         }
 900                         if (texcoord2f)
 901                         {
 902                                 v[12] = texcoord2f[e * 2 + 0];
 903                                 v[13] = texcoord2f[e * 2 + 1];
 904                         }
 905                 }
 906                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 907         }
 908 }
 909
 910 shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable)
 911 {
 912         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 913 }
 914
 915 static void Mod_ShadowMesh_CreateVBOs(shadowmesh_t *mesh)
 916 {
 917         if (!gl_support_arb_vertex_buffer_object)
 918                 return;
 919
 920         // element buffer is easy because it's just one array
 921         if (mesh->numtriangles)
 922                 mesh->ebo = R_Mesh_CreateStaticBufferObject(GL_ELEMENT_ARRAY_BUFFER_ARB, mesh->element3i, mesh->numtriangles * sizeof(int[3]), "shadowmesh");
 923
 924         // vertex buffer is several arrays and we put them in the same buffer
 925         //
 926         // is this wise?  the texcoordtexture2f array is used with dynamic
 927         // vertex/svector/tvector/normal when rendering animated models, on the
 928         // other hand animated models don't use a lot of vertices anyway...
 929         if (mesh->numverts)
 930         {
 931                 size_t size;
 932                 unsigned char *mem;
 933                 size = 0;
 934                 mesh->vbooffset_vertex3f           = size;if (mesh->vertex3f          ) size += mesh->numverts * sizeof(float[3]);
 935                 mesh->vbooffset_svector3f          = size;if (mesh->svector3f         ) size += mesh->numverts * sizeof(float[3]);
 936                 mesh->vbooffset_tvector3f          = size;if (mesh->tvector3f         ) size += mesh->numverts * sizeof(float[3]);
 937                 mesh->vbooffset_normal3f           = size;if (mesh->normal3f          ) size += mesh->numverts * sizeof(float[3]);
 938                 mesh->vbooffset_texcoord2f         = size;if (mesh->texcoord2f        ) size += mesh->numverts * sizeof(float[2]);
 939                 mem = (unsigned char *)Mem_Alloc(tempmempool, size);
 940                 if (mesh->vertex3f          ) memcpy(mem + mesh->vbooffset_vertex3f          , mesh->vertex3f          , mesh->numverts * sizeof(float[3]));
 941                 if (mesh->svector3f         ) memcpy(mem + mesh->vbooffset_svector3f         , mesh->svector3f         , mesh->numverts * sizeof(float[3]));
 942                 if (mesh->tvector3f         ) memcpy(mem + mesh->vbooffset_tvector3f         , mesh->tvector3f         , mesh->numverts * sizeof(float[3]));
 943                 if (mesh->normal3f          ) memcpy(mem + mesh->vbooffset_normal3f          , mesh->normal3f          , mesh->numverts * sizeof(float[3]));
 944                 if (mesh->texcoord2f        ) memcpy(mem + mesh->vbooffset_texcoord2f        , mesh->texcoord2f        , mesh->numverts * sizeof(float[2]));
 945                 mesh->vbo = R_Mesh_CreateStaticBufferObject(GL_ARRAY_BUFFER_ARB, mem, size, "shadowmesh");
 946                 Mem_Free(mem);
 947         }
 948 }
 949
 950 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, qboolean light, qboolean neighbors, qboolean createvbo)
 951 {
 952         shadowmesh_t *mesh, *newmesh, *nextmesh;
 953         // reallocate meshs to conserve space
 954         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 955         {
 956                 nextmesh = mesh->next;
 957                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 958                 {
 959                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 960                         newmesh->next = firstmesh;
 961                         firstmesh = newmesh;
 962                         if (createvbo)
 963                                 Mod_ShadowMesh_CreateVBOs(newmesh);
 964                 }
 965                 Mem_Free(mesh);
 966         }
 967         return firstmesh;
 968 }
 969
 970 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 971 {
 972         int i;
 973         shadowmesh_t *mesh;
 974         vec3_t nmins, nmaxs, ncenter, temp;
 975         float nradius2, dist2, *v;
 976         VectorClear(nmins);
 977         VectorClear(nmaxs);
 978         // calculate bbox
 979         for (mesh = firstmesh;mesh;mesh = mesh->next)
 980         {
 981                 if (mesh == firstmesh)
 982                 {
 983                         VectorCopy(mesh->vertex3f, nmins);
 984                         VectorCopy(mesh->vertex3f, nmaxs);
 985                 }
 986                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 987                 {
 988                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 989                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 990                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 991                 }
 992         }
 993         // calculate center and radius
 994         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 995         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 996         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 997         nradius2 = 0;
 998         for (mesh = firstmesh;mesh;mesh = mesh->next)
 999         {
1000                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
1001                 {
1002                         VectorSubtract(v, ncenter, temp);
1003                         dist2 = DotProduct(temp, temp);
1004                         if (nradius2 < dist2)
1005                                 nradius2 = dist2;
1006                 }
1007         }
1008         // return data
1009         if (mins)
1010                 VectorCopy(nmins, mins);
1011         if (maxs)
1012                 VectorCopy(nmaxs, maxs);
1013         if (center)
1014                 VectorCopy(ncenter, center);
1015         if (radius)
1016                 *radius = sqrt(nradius2);
1017 }
1018
1019 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
1020 {
1021         shadowmesh_t *nextmesh;
1022         for (;mesh;mesh = nextmesh)
1023         {
1024                 if (mesh->ebo)
1025                         R_Mesh_DestroyBufferObject(mesh->ebo);
1026                 if (mesh->vbo)
1027                         R_Mesh_DestroyBufferObject(mesh->vbo);
1028                 nextmesh = mesh->next;
1029                 Mem_Free(mesh);
1030         }
1031 }
1032
1033 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1034 {
1035         float v[3], tc[3];
1036         v[0] = ix;
1037         v[1] = iy;
1038         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1039                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1040         else
1041                 v[2] = 0;
1042         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1043         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1044         texcoord2f[0] = tc[0];
1045         texcoord2f[1] = tc[1];
1046 }
1047
1048 void Mod_GetTerrainVertexFromRGBA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1049 {
1050         float vup[3], vdown[3], vleft[3], vright[3];
1051         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1052         float sv[3], tv[3], nl[3];
1053         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1054         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1055         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1056         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1057         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1058         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1059         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1060         VectorAdd(svector3f, sv, svector3f);
1061         VectorAdd(tvector3f, tv, tvector3f);
1062         VectorAdd(normal3f, nl, normal3f);
1063         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1064         VectorAdd(svector3f, sv, svector3f);
1065         VectorAdd(tvector3f, tv, tvector3f);
1066         VectorAdd(normal3f, nl, normal3f);
1067         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1068         VectorAdd(svector3f, sv, svector3f);
1069         VectorAdd(tvector3f, tv, tvector3f);
1070         VectorAdd(normal3f, nl, normal3f);
1071 }
1072
1073 void Mod_ConstructTerrainPatchFromRGBA(const unsigned char *imagepixels, int imagewidth, int imageheight, int x1, int y1, int width, int height, int *element3i, int *neighbor3i, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1074 {
1075         int x, y, ix, iy, *e;
1076         e = element3i;
1077         for (y = 0;y < height;y++)
1078         {
1079                 for (x = 0;x < width;x++)
1080                 {
1081                         e[0] = (y + 1) * (width + 1) + (x + 0);
1082                         e[1] = (y + 0) * (width + 1) + (x + 0);
1083                         e[2] = (y + 1) * (width + 1) + (x + 1);
1084                         e[3] = (y + 0) * (width + 1) + (x + 0);
1085                         e[4] = (y + 0) * (width + 1) + (x + 1);
1086                         e[5] = (y + 1) * (width + 1) + (x + 1);
1087                         e += 6;
1088                 }
1089         }
1090         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1091         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1092                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1093                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1094 }
1095
1096 q3wavefunc_t Mod_LoadQ3Shaders_EnumerateWaveFunc(const char *s)
1097 {
1098         if (!strcasecmp(s, "sin"))             return Q3WAVEFUNC_SIN;
1099         if (!strcasecmp(s, "square"))          return Q3WAVEFUNC_SQUARE;
1100         if (!strcasecmp(s, "triangle"))        return Q3WAVEFUNC_TRIANGLE;
1101         if (!strcasecmp(s, "sawtooth"))        return Q3WAVEFUNC_SAWTOOTH;
1102         if (!strcasecmp(s, "inversesawtooth")) return Q3WAVEFUNC_INVERSESAWTOOTH;
1103         if (!strcasecmp(s, "noise"))           return Q3WAVEFUNC_NOISE;
1104         Con_DPrintf("Mod_LoadQ3Shaders: unknown wavefunc %s\n", s);
1105         return Q3WAVEFUNC_NONE;
1106 }
1107
1108 void Mod_LoadQ3Shaders(void)
1109 {
1110         int j;
1111         int fileindex;
1112         fssearch_t *search;
1113         char *f;
1114         const char *text;
1115         q3shaderinfo_t *shader;
1116         q3shaderinfo_layer_t *layer;
1117         int numparameters;
1118         char parameter[TEXTURE_MAXFRAMES + 4][Q3PATHLENGTH];
1119         q3shaders_numshaders = 0;
1120         search = FS_Search("scripts/*.shader", true, false);
1121         if (!search)
1122                 return;
1123         for (fileindex = 0;fileindex < search->numfilenames;fileindex++)
1124         {
1125                 text = f = (char *)FS_LoadFile(search->filenames[fileindex], tempmempool, false, NULL);
1126                 if (!f)
1127                         continue;
1128                 while (COM_ParseToken_QuakeC(&text, false))
1129                 {
1130                         if (q3shaders_numshaders >= Q3SHADER_MAXSHADERS)
1131                         {
1132                                 Con_Printf("Mod_LoadQ3Shaders: too many shaders!\n");
1133                                 break;
1134                         }
1135                         shader = q3shaders_shaders + q3shaders_numshaders++;
1136
1137                         memset(shader, 0, sizeof(*shader));
1138                         shader->reflectmin = 0;
1139                         shader->reflectmax = 1;
1140                         shader->refractfactor = 1;
1141                         Vector4Set(shader->refractcolor4f, 1, 1, 1, 1);
1142                         shader->reflectfactor = 1;
1143                         Vector4Set(shader->reflectcolor4f, 1, 1, 1, 1);
1144
1145                         strlcpy(shader->name, com_token, sizeof(shader->name));
1146                         if (!COM_ParseToken_QuakeC(&text, false) || strcasecmp(com_token, "{"))
1147                         {
1148                                 Con_Printf("%s parsing error - expected \"{\", found \"%s\"\n", search->filenames[fileindex], com_token);
1149                                 break;
1150                         }
1151                         while (COM_ParseToken_QuakeC(&text, false))
1152                         {
1153                                 if (!strcasecmp(com_token, "}"))
1154                                         break;
1155                                 if (!strcasecmp(com_token, "{"))
1156                                 {
1157                                         static q3shaderinfo_layer_t dummy;
1158                                         if (shader->numlayers < Q3SHADER_MAXLAYERS)
1159                                         {
1160                                                 layer = shader->layers + shader->numlayers++;
1161                                         }
1162                                         else
1163                                         {
1164                                                 // parse and process it anyway, just don't store it (so a map $lightmap or such stuff still is found)
1165                                                 memset(&dummy, 0, sizeof(dummy));
1166                                                 layer = &dummy;
1167                                         }
1168                                         layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITY;
1169                                         layer->alphagen.alphagen = Q3ALPHAGEN_IDENTITY;
1170                                         layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
1171                                         layer->blendfunc[0] = GL_ONE;
1172                                         layer->blendfunc[1] = GL_ZERO;
1173                                         while (COM_ParseToken_QuakeC(&text, false))
1174                                         {
1175                                                 if (!strcasecmp(com_token, "}"))
1176                                                         break;
1177                                                 if (!strcasecmp(com_token, "\n"))
1178                                                         continue;
1179                                                 numparameters = 0;
1180                                                 for (j = 0;strcasecmp(com_token, "\n") && strcasecmp(com_token, "}");j++)
1181                                                 {
1182                                                         if (j < TEXTURE_MAXFRAMES + 4)
1183                                                         {
1184                                                                 strlcpy(parameter[j], com_token, sizeof(parameter[j]));
1185                                                                 numparameters = j + 1;
1186                                                         }
1187                                                         if (!COM_ParseToken_QuakeC(&text, true))
1188                                                                 break;
1189                                                 }
1190                                                 for (j = numparameters;j < TEXTURE_MAXFRAMES + 4;j++)
1191                                                         parameter[j][0] = 0;
1192                                                 if (developer.integer >= 100)
1193                                                 {
1194                                                         Con_Printf("%s %i: ", shader->name, shader->numlayers - 1);
1195                                                         for (j = 0;j < numparameters;j++)
1196                                                                 Con_Printf(" %s", parameter[j]);
1197                                                         Con_Print("\n");
1198                                                 }
1199                                                 if (numparameters >= 2 && !strcasecmp(parameter[0], "blendfunc"))
1200                                                 {
1201                                                         if (numparameters == 2)
1202                                                         {
1203                                                                 if (!strcasecmp(parameter[1], "add"))
1204                                                                 {
1205                                                                         layer->blendfunc[0] = GL_ONE;
1206                                                                         layer->blendfunc[1] = GL_ONE;
1207                                                                 }
1208                                                                 else if (!strcasecmp(parameter[1], "filter"))
1209                                                                 {
1210                                                                         layer->blendfunc[0] = GL_DST_COLOR;
1211                                                                         layer->blendfunc[1] = GL_ZERO;
1212                                                                 }
1213                                                                 else if (!strcasecmp(parameter[1], "blend"))
1214                                                                 {
1215                                                                         layer->blendfunc[0] = GL_SRC_ALPHA;
1216                                                                         layer->blendfunc[1] = GL_ONE_MINUS_SRC_ALPHA;
1217                                                                 }
1218                                                         }
1219                                                         else if (numparameters == 3)
1220                                                         {
1221                                                                 int k;
1222                                                                 for (k = 0;k < 2;k++)
1223                                                                 {
1224                                                                         if (!strcasecmp(parameter[k+1], "GL_ONE"))
1225                                                                                 layer->blendfunc[k] = GL_ONE;
1226                                                                         else if (!strcasecmp(parameter[k+1], "GL_ZERO"))
1227                                                                                 layer->blendfunc[k] = GL_ZERO;
1228                                                                         else if (!strcasecmp(parameter[k+1], "GL_SRC_COLOR"))
1229                                                                                 layer->blendfunc[k] = GL_SRC_COLOR;
1230                                                                         else if (!strcasecmp(parameter[k+1], "GL_SRC_ALPHA"))
1231                                                                                 layer->blendfunc[k] = GL_SRC_ALPHA;
1232                                                                         else if (!strcasecmp(parameter[k+1], "GL_DST_COLOR"))
1233                                                                                 layer->blendfunc[k] = GL_DST_COLOR;
1234                                                                         else if (!strcasecmp(parameter[k+1], "GL_DST_ALPHA"))
1235                                                                                 layer->blendfunc[k] = GL_ONE_MINUS_DST_ALPHA;
1236                                                                         else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_SRC_COLOR"))
1237                                                                                 layer->blendfunc[k] = GL_ONE_MINUS_SRC_COLOR;
1238                                                                         else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_SRC_ALPHA"))
1239                                                                                 layer->blendfunc[k] = GL_ONE_MINUS_SRC_ALPHA;
1240                                                                         else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_DST_COLOR"))
1241                                                                                 layer->blendfunc[k] = GL_ONE_MINUS_DST_COLOR;
1242                                                                         else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_DST_ALPHA"))
1243                                                                                 layer->blendfunc[k] = GL_ONE_MINUS_DST_ALPHA;
1244                                                                         else
1245                                                                                 layer->blendfunc[k] = GL_ONE; // default in case of parsing error
1246                                                                 }
1247                                                         }
1248                                                 }
1249                                                 if (numparameters >= 2 && !strcasecmp(parameter[0], "alphafunc"))
1250                                                         layer->alphatest = true;
1251                                                 if (numparameters >= 2 && (!strcasecmp(parameter[0], "map") || !strcasecmp(parameter[0], "clampmap")))
1252                                                 {
1253                                                         if (!strcasecmp(parameter[0], "clampmap"))
1254                                                                 layer->clampmap = true;
1255                                                         layer->numframes = 1;
1256                                                         layer->framerate = 1;
1257                                                         strlcpy(layer->texturename[0], parameter[1], sizeof(layer->texturename));
1258                                                         if (!strcasecmp(parameter[1], "$lightmap"))
1259                                                                 shader->lighting = true;
1260                                                 }
1261                                                 else if (numparameters >= 3 && (!strcasecmp(parameter[0], "animmap") || !strcasecmp(parameter[0], "animclampmap")))
1262                                                 {
1263                                                         int i;
1264                                                         layer->numframes = min(numparameters - 2, TEXTURE_MAXFRAMES);
1265                                                         layer->framerate = atof(parameter[1]);
1266                                                         for (i = 0;i < layer->numframes;i++)
1267                                                                 strlcpy(layer->texturename[i], parameter[i + 2], sizeof(layer->texturename));
1268                                                 }
1269                                                 else if (numparameters >= 2 && !strcasecmp(parameter[0], "rgbgen"))
1270                                                 {
1271                                                         int i;
1272                                                         for (i = 0;i < numparameters - 2 && i < Q3RGBGEN_MAXPARMS;i++)
1273                                                                 layer->rgbgen.parms[i] = atof(parameter[i+2]);
1274                                                              if (!strcasecmp(parameter[1], "identity"))         layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITY;
1275                                                         else if (!strcasecmp(parameter[1], "const"))            layer->rgbgen.rgbgen = Q3RGBGEN_CONST;
1276                                                         else if (!strcasecmp(parameter[1], "entity"))           layer->rgbgen.rgbgen = Q3RGBGEN_ENTITY;
1277                                                         else if (!strcasecmp(parameter[1], "exactvertex"))      layer->rgbgen.rgbgen = Q3RGBGEN_EXACTVERTEX;
1278                                                         else if (!strcasecmp(parameter[1], "identitylighting")) layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITYLIGHTING;
1279                                                         else if (!strcasecmp(parameter[1], "lightingdiffuse"))  layer->rgbgen.rgbgen = Q3RGBGEN_LIGHTINGDIFFUSE;
1280                                                         else if (!strcasecmp(parameter[1], "oneminusentity"))   layer->rgbgen.rgbgen = Q3RGBGEN_ONEMINUSENTITY;
1281                                                         else if (!strcasecmp(parameter[1], "oneminusvertex"))   layer->rgbgen.rgbgen = Q3RGBGEN_ONEMINUSVERTEX;
1282                                                         else if (!strcasecmp(parameter[1], "vertex"))           layer->rgbgen.rgbgen = Q3RGBGEN_VERTEX;
1283                                                         else if (!strcasecmp(parameter[1], "wave"))
1284                                                         {
1285                                                                 layer->rgbgen.rgbgen = Q3RGBGEN_WAVE;
1286                                                                 layer->rgbgen.wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
1287                                                                 for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
1288                                                                         layer->rgbgen.waveparms[i] = atof(parameter[i+3]);
1289                                                         }
1290                                                         else Con_DPrintf("%s parsing warning: unknown rgbgen %s\n", search->filenames[fileindex], parameter[1]);
1291                                                 }
1292                                                 else if (numparameters >= 2 && !strcasecmp(parameter[0], "alphagen"))
1293                                                 {
1294                                                         int i;
1295                                                         for (i = 0;i < numparameters - 2 && i < Q3ALPHAGEN_MAXPARMS;i++)
1296                                                                 layer->alphagen.parms[i] = atof(parameter[i+2]);
1297                                                              if (!strcasecmp(parameter[1], "identity"))         layer->alphagen.alphagen = Q3ALPHAGEN_IDENTITY;
1298                                                         else if (!strcasecmp(parameter[1], "const"))            layer->alphagen.alphagen = Q3ALPHAGEN_CONST;
1299                                                         else if (!strcasecmp(parameter[1], "entity"))           layer->alphagen.alphagen = Q3ALPHAGEN_ENTITY;
1300                                                         else if (!strcasecmp(parameter[1], "lightingspecular")) layer->alphagen.alphagen = Q3ALPHAGEN_LIGHTINGSPECULAR;
1301                                                         else if (!strcasecmp(parameter[1], "oneminusentity"))   layer->alphagen.alphagen = Q3ALPHAGEN_ONEMINUSENTITY;
1302                                                         else if (!strcasecmp(parameter[1], "oneminusvertex"))   layer->alphagen.alphagen = Q3ALPHAGEN_ONEMINUSVERTEX;
1303                                                         else if (!strcasecmp(parameter[1], "portal"))           layer->alphagen.alphagen = Q3ALPHAGEN_PORTAL;
1304                                                         else if (!strcasecmp(parameter[1], "vertex"))           layer->alphagen.alphagen = Q3ALPHAGEN_VERTEX;
1305                                                         else if (!strcasecmp(parameter[1], "wave"))
1306                                                         {
1307                                                                 layer->alphagen.alphagen = Q3RGBGEN_WAVE;
1308                                                                 layer->alphagen.wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
1309                                                                 for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
1310                                                                         layer->alphagen.waveparms[i] = atof(parameter[i+3]);
1311                                                         }
1312                                                         else Con_DPrintf("%s parsing warning: unknown alphagen %s\n", search->filenames[fileindex], parameter[1]);
1313                                                 }
1314                                                 else if (numparameters >= 2 && (!strcasecmp(parameter[0], "texgen") || !strcasecmp(parameter[0], "tcgen")))
1315                                                 {
1316                                                         int i;
1317                                                         // observed values: tcgen environment
1318                                                         // no other values have been observed in real shaders
1319                                                         for (i = 0;i < numparameters - 2 && i < Q3TCGEN_MAXPARMS;i++)
1320                                                                 layer->tcgen.parms[i] = atof(parameter[i+2]);
1321                                                              if (!strcasecmp(parameter[1], "base"))        layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
1322                                                         else if (!strcasecmp(parameter[1], "texture"))     layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
1323                                                         else if (!strcasecmp(parameter[1], "environment")) layer->tcgen.tcgen = Q3TCGEN_ENVIRONMENT;
1324                                                         else if (!strcasecmp(parameter[1], "lightmap"))    layer->tcgen.tcgen = Q3TCGEN_LIGHTMAP;
1325                                                         else if (!strcasecmp(parameter[1], "vector"))      layer->tcgen.tcgen = Q3TCGEN_VECTOR;
1326                                                         else Con_DPrintf("%s parsing warning: unknown tcgen mode %s\n", search->filenames[fileindex], parameter[1]);
1327                                                 }
1328                                                 else if (numparameters >= 2 && !strcasecmp(parameter[0], "tcmod"))
1329                                                 {
1330                                                         int i, tcmodindex;
1331                                                         // observed values:
1332                                                         // tcmod rotate #
1333                                                         // tcmod scale # #
1334                                                         // tcmod scroll # #
1335                                                         // tcmod stretch sin # # # #
1336                                                         // tcmod stretch triangle # # # #
1337                                                         // tcmod transform # # # # # #
1338                                                         // tcmod turb # # # #
1339                                                         // tcmod turb sin # # # #  (this is bogus)
1340                                                         // no other values have been observed in real shaders
1341                                                         for (tcmodindex = 0;tcmodindex < Q3MAXTCMODS;tcmodindex++)
1342                                                                 if (!layer->tcmods[tcmodindex].tcmod)
1343                                                                         break;
1344                                                         if (tcmodindex < Q3MAXTCMODS)
1345                                                         {
1346                                                                 for (i = 0;i < numparameters - 2 && i < Q3TCMOD_MAXPARMS;i++)
1347                                                                         layer->tcmods[tcmodindex].parms[i] = atof(parameter[i+2]);
1348                                                                          if (!strcasecmp(parameter[1], "entitytranslate")) layer->tcmods[tcmodindex].tcmod = Q3TCMOD_ENTITYTRANSLATE;
1349                                                                 else if (!strcasecmp(parameter[1], "rotate"))          layer->tcmods[tcmodindex].tcmod = Q3TCMOD_ROTATE;
1350                                                                 else if (!strcasecmp(parameter[1], "scale"))           layer->tcmods[tcmodindex].tcmod = Q3TCMOD_SCALE;
1351                                                                 else if (!strcasecmp(parameter[1], "scroll"))          layer->tcmods[tcmodindex].tcmod = Q3TCMOD_SCROLL;
1352                                                                 else if (!strcasecmp(parameter[1], "stretch"))
1353                                                                 {
1354                                                                         layer->tcmods[tcmodindex].tcmod = Q3TCMOD_STRETCH;
1355                                                                         layer->tcmods[tcmodindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
1356                                                                         for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
1357                                                                                 layer->tcmods[tcmodindex].waveparms[i] = atof(parameter[i+3]);
1358                                                                 }
1359                                                                 else if (!strcasecmp(parameter[1], "transform"))       layer->tcmods[tcmodindex].tcmod = Q3TCMOD_TRANSFORM;
1360                                                                 else if (!strcasecmp(parameter[1], "turb"))            layer->tcmods[tcmodindex].tcmod = Q3TCMOD_TURBULENT;
1361                                                                 else Con_DPrintf("%s parsing warning: unknown tcmod mode %s\n", search->filenames[fileindex], parameter[1]);
1362                                                         }
1363                                                         else
1364                                                                 Con_DPrintf("%s parsing warning: too many tcmods on one layer\n", search->filenames[fileindex]);
1365                                                 }
1366                                                 // break out a level if it was a closing brace (not using the character here to not confuse vim)
1367                                                 if (!strcasecmp(com_token, "}"))
1368                                                         break;
1369                                         }
1370                                         if (layer->rgbgen.rgbgen == Q3RGBGEN_LIGHTINGDIFFUSE || layer->rgbgen.rgbgen == Q3RGBGEN_VERTEX)
1371                                                 shader->lighting = true;
1372                                         if (layer->alphagen.alphagen == Q3ALPHAGEN_VERTEX)
1373                                         {
1374                                                 if (layer == shader->layers + 0)
1375                                                 {
1376                                                         // vertex controlled transparency
1377                                                         shader->vertexalpha = true;
1378                                                 }
1379                                                 else
1380                                                 {
1381                                                         // multilayer terrain shader or similar
1382                                                         shader->textureblendalpha = true;
1383                                                 }
1384                                         }
1385                                         continue;
1386                                 }
1387                                 numparameters = 0;
1388                                 for (j = 0;strcasecmp(com_token, "\n") && strcasecmp(com_token, "}");j++)
1389                                 {
1390                                         if (j < TEXTURE_MAXFRAMES + 4)
1391                                         {
1392                                                 strlcpy(parameter[j], com_token, sizeof(parameter[j]));
1393                                                 numparameters = j + 1;
1394                                         }
1395                                         if (!COM_ParseToken_QuakeC(&text, true))
1396                                                 break;
1397                                 }
1398                                 for (j = numparameters;j < TEXTURE_MAXFRAMES + 4;j++)
1399                                         parameter[j][0] = 0;
1400                                 if (fileindex == 0 && !strcasecmp(com_token, "}"))
1401                                         break;
1402                                 if (developer.integer >= 100)
1403                                 {
1404                                         Con_Printf("%s: ", shader->name);
1405                                         for (j = 0;j < numparameters;j++)
1406                                                 Con_Printf(" %s", parameter[j]);
1407                                         Con_Print("\n");
1408                                 }
1409                                 if (numparameters < 1)
1410                                         continue;
1411                                 if (!strcasecmp(parameter[0], "surfaceparm") && numparameters >= 2)
1412                                 {
1413                                         if (!strcasecmp(parameter[1], "alphashadow"))
1414                                                 shader->surfaceparms |= Q3SURFACEPARM_ALPHASHADOW;
1415                                         else if (!strcasecmp(parameter[1], "areaportal"))
1416                                                 shader->surfaceparms |= Q3SURFACEPARM_AREAPORTAL;
1417                                         else if (!strcasecmp(parameter[1], "botclip"))
1418                                                 shader->surfaceparms |= Q3SURFACEPARM_BOTCLIP;
1419                                         else if (!strcasecmp(parameter[1], "clusterportal"))
1420                                                 shader->surfaceparms |= Q3SURFACEPARM_CLUSTERPORTAL;
1421                                         else if (!strcasecmp(parameter[1], "detail"))
1422                                                 shader->surfaceparms |= Q3SURFACEPARM_DETAIL;
1423                                         else if (!strcasecmp(parameter[1], "donotenter"))
1424                                                 shader->surfaceparms |= Q3SURFACEPARM_DONOTENTER;
1425                                         else if (!strcasecmp(parameter[1], "dust"))
1426                                                 shader->surfaceparms |= Q3SURFACEPARM_DUST;
1427                                         else if (!strcasecmp(parameter[1], "hint"))
1428                                                 shader->surfaceparms |= Q3SURFACEPARM_HINT;
1429                                         else if (!strcasecmp(parameter[1], "fog"))
1430                                                 shader->surfaceparms |= Q3SURFACEPARM_FOG;
1431                                         else if (!strcasecmp(parameter[1], "lava"))
1432                                                 shader->surfaceparms |= Q3SURFACEPARM_LAVA;
1433                                         else if (!strcasecmp(parameter[1], "lightfilter"))
1434                                                 shader->surfaceparms |= Q3SURFACEPARM_LIGHTFILTER;
1435                                         else if (!strcasecmp(parameter[1], "lightgrid"))
1436                                                 shader->surfaceparms |= Q3SURFACEPARM_LIGHTGRID;
1437                                         else if (!strcasecmp(parameter[1], "metalsteps"))
1438                                                 shader->surfaceparms |= Q3SURFACEPARM_METALSTEPS;
1439                                         else if (!strcasecmp(parameter[1], "nodamage"))
1440                                                 shader->surfaceparms |= Q3SURFACEPARM_NODAMAGE;
1441                                         else if (!strcasecmp(parameter[1], "nodlight"))
1442                                                 shader->surfaceparms |= Q3SURFACEPARM_NODLIGHT;
1443                                         else if (!strcasecmp(parameter[1], "nodraw"))
1444                                                 shader->surfaceparms |= Q3SURFACEPARM_NODRAW;
1445                                         else if (!strcasecmp(parameter[1], "nodrop"))
1446                                                 shader->surfaceparms |= Q3SURFACEPARM_NODROP;
1447                                         else if (!strcasecmp(parameter[1], "noimpact"))
1448                                                 shader->surfaceparms |= Q3SURFACEPARM_NOIMPACT;
1449                                         else if (!strcasecmp(parameter[1], "nolightmap"))
1450                                                 shader->surfaceparms |= Q3SURFACEPARM_NOLIGHTMAP;
1451                                         else if (!strcasecmp(parameter[1], "nomarks"))
1452                                                 shader->surfaceparms |= Q3SURFACEPARM_NOMARKS;
1453                                         else if (!strcasecmp(parameter[1], "nomipmaps"))
1454                                                 shader->surfaceparms |= Q3SURFACEPARM_NOMIPMAPS;
1455                                         else if (!strcasecmp(parameter[1], "nonsolid"))
1456                                                 shader->surfaceparms |= Q3SURFACEPARM_NONSOLID;
1457                                         else if (!strcasecmp(parameter[1], "origin"))
1458                                                 shader->surfaceparms |= Q3SURFACEPARM_ORIGIN;
1459                                         else if (!strcasecmp(parameter[1], "playerclip"))
1460                                                 shader->surfaceparms |= Q3SURFACEPARM_PLAYERCLIP;
1461                                         else if (!strcasecmp(parameter[1], "sky"))
1462                                                 shader->surfaceparms |= Q3SURFACEPARM_SKY;
1463                                         else if (!strcasecmp(parameter[1], "slick"))
1464                                                 shader->surfaceparms |= Q3SURFACEPARM_SLICK;
1465                                         else if (!strcasecmp(parameter[1], "slime"))
1466                                                 shader->surfaceparms |= Q3SURFACEPARM_SLIME;
1467                                         else if (!strcasecmp(parameter[1], "structural"))
1468                                                 shader->surfaceparms |= Q3SURFACEPARM_STRUCTURAL;
1469                                         else if (!strcasecmp(parameter[1], "trans"))
1470                                                 shader->surfaceparms |= Q3SURFACEPARM_TRANS;
1471                                         else if (!strcasecmp(parameter[1], "water"))
1472                                                 shader->surfaceparms |= Q3SURFACEPARM_WATER;
1473                                         else if (!strcasecmp(parameter[1], "pointlight"))
1474                                                 shader->surfaceparms |= Q3SURFACEPARM_POINTLIGHT;
1475                                         else if (!strcasecmp(parameter[1], "antiportal"))
1476                                                 shader->surfaceparms |= Q3SURFACEPARM_ANTIPORTAL;
1477                                         else
1478                                                 Con_DPrintf("%s parsing warning: unknown surfaceparm \"%s\"\n", search->filenames[fileindex], parameter[1]);
1479                                 }
1480                                 else if (!strcasecmp(parameter[0], "sky") && numparameters >= 2)
1481                                 {
1482                                         // some q3 skies don't have the sky parm set
1483                                         shader->surfaceparms |= Q3SURFACEPARM_SKY;
1484                                         strlcpy(shader->skyboxname, parameter[1], sizeof(shader->skyboxname));
1485                                 }
1486                                 else if (!strcasecmp(parameter[0], "skyparms") && numparameters >= 2)
1487                                 {
1488                                         // some q3 skies don't have the sky parm set
1489                                         shader->surfaceparms |= Q3SURFACEPARM_SKY;
1490                                         if (!atoi(parameter[1]) && strcasecmp(parameter[1], "-"))
1491                                                 strlcpy(shader->skyboxname, parameter[1], sizeof(shader->skyboxname));
1492                                 }
1493                                 else if (!strcasecmp(parameter[0], "cull") && numparameters >= 2)
1494                                 {
1495                                         if (!strcasecmp(parameter[1], "disable") || !strcasecmp(parameter[1], "none") || !strcasecmp(parameter[1], "twosided"))
1496                                                 shader->textureflags |= Q3TEXTUREFLAG_TWOSIDED;
1497                                 }
1498                                 else if (!strcasecmp(parameter[0], "nomipmaps"))
1499                                         shader->surfaceparms |= Q3SURFACEPARM_NOMIPMAPS;
1500                                 else if (!strcasecmp(parameter[0], "nopicmip"))
1501                                         shader->textureflags |= Q3TEXTUREFLAG_NOPICMIP;
1502                                 else if (!strcasecmp(parameter[0], "polygonoffset"))
1503                                         shader->textureflags |= Q3TEXTUREFLAG_POLYGONOFFSET;
1504                                 else if (!strcasecmp(parameter[0], "dp_refract") && numparameters >= 5)
1505                                 {
1506                                         shader->textureflags |= Q3TEXTUREFLAG_REFRACTION;
1507                                         shader->refractfactor = atof(parameter[1]);
1508                                         Vector4Set(shader->refractcolor4f, atof(parameter[2]), atof(parameter[3]), atof(parameter[4]), 1);
1509                                 }
1510                                 else if (!strcasecmp(parameter[0], "dp_reflect") && numparameters >= 6)
1511                                 {
1512                                         shader->textureflags |= Q3TEXTUREFLAG_REFLECTION;
1513                                         shader->reflectfactor = atof(parameter[1]);
1514                                         Vector4Set(shader->reflectcolor4f, atof(parameter[2]), atof(parameter[3]), atof(parameter[4]), atof(parameter[5]));
1515                                 }
1516                                 else if (!strcasecmp(parameter[0], "dp_water") && numparameters >= 11)
1517                                 {
1518                                         shader->textureflags |= Q3TEXTUREFLAG_WATERSHADER;
1519                                         shader->reflectmin = atof(parameter[1]);
1520                                         shader->reflectmax = atof(parameter[2]);
1521                                         shader->refractfactor = atof(parameter[3]);
1522                                         shader->reflectfactor = atof(parameter[4]);
1523                                         Vector4Set(shader->refractcolor4f, atof(parameter[5]), atof(parameter[6]), atof(parameter[7]), 1);
1524                                         Vector4Set(shader->reflectcolor4f, atof(parameter[8]), atof(parameter[9]), atof(parameter[10]), 1);
1525                                 }
1526                                 else if (!strcasecmp(parameter[0], "deformvertexes") && numparameters >= 2)
1527                                 {
1528                                         int i, deformindex;
1529                                         for (deformindex = 0;deformindex < Q3MAXDEFORMS;deformindex++)
1530                                                 if (!shader->deforms[deformindex].deform)
1531                                                         break;
1532                                         if (deformindex < Q3MAXDEFORMS)
1533                                         {
1534                                                 for (i = 0;i < numparameters - 2 && i < Q3DEFORM_MAXPARMS;i++)
1535                                                         shader->deforms[deformindex].parms[i] = atof(parameter[i+2]);
1536                                                      if (!strcasecmp(parameter[1], "projectionshadow")) shader->deforms[deformindex].deform = Q3DEFORM_PROJECTIONSHADOW;
1537                                                 else if (!strcasecmp(parameter[1], "autosprite"      )) shader->deforms[deformindex].deform = Q3DEFORM_AUTOSPRITE;
1538                                                 else if (!strcasecmp(parameter[1], "autosprite2"     )) shader->deforms[deformindex].deform = Q3DEFORM_AUTOSPRITE2;
1539                                                 else if (!strcasecmp(parameter[1], "text0"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT0;
1540                                                 else if (!strcasecmp(parameter[1], "text1"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT1;
1541                                                 else if (!strcasecmp(parameter[1], "text2"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT2;
1542                                                 else if (!strcasecmp(parameter[1], "text3"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT3;
1543                                                 else if (!strcasecmp(parameter[1], "text4"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT4;
1544                                                 else if (!strcasecmp(parameter[1], "text5"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT5;
1545                                                 else if (!strcasecmp(parameter[1], "text6"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT6;
1546                                                 else if (!strcasecmp(parameter[1], "text7"           )) shader->deforms[deformindex].deform = Q3DEFORM_TEXT7;
1547                                                 else if (!strcasecmp(parameter[1], "bulge"           )) shader->deforms[deformindex].deform = Q3DEFORM_BULGE;
1548                                                 else if (!strcasecmp(parameter[1], "normal"          )) shader->deforms[deformindex].deform = Q3DEFORM_NORMAL;
1549                                                 else if (!strcasecmp(parameter[1], "wave"            ))
1550                                                 {
1551                                                         shader->deforms[deformindex].deform = Q3DEFORM_WAVE;
1552                                                         shader->deforms[deformindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[3]);
1553                                                         for (i = 0;i < numparameters - 4 && i < Q3WAVEPARMS;i++)
1554                                                                 shader->deforms[deformindex].waveparms[i] = atof(parameter[i+4]);
1555                                                 }
1556                                                 else if (!strcasecmp(parameter[1], "move"            ))
1557                                                 {
1558                                                         shader->deforms[deformindex].deform = Q3DEFORM_MOVE;
1559                                                         shader->deforms[deformindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[5]);
1560                                                         for (i = 0;i < numparameters - 6 && i < Q3WAVEPARMS;i++)
1561                                                                 shader->deforms[deformindex].waveparms[i] = atof(parameter[i+6]);
1562                                                 }
1563                                         }
1564                                 }
1565                         }
1566                         // identify if this is a blended terrain shader or similar
1567                         if (shader->numlayers)
1568                         {
1569                                 shader->backgroundlayer = NULL;
1570                                 shader->primarylayer = shader->layers + 0;
1571                                 if ((shader->layers[0].blendfunc[0] == GL_ONE       && shader->layers[0].blendfunc[1] == GL_ZERO                && !shader->layers[0].alphatest)
1572                                 && ((shader->layers[1].blendfunc[0] == GL_SRC_ALPHA && shader->layers[1].blendfunc[1] == GL_ONE_MINUS_SRC_ALPHA && !shader->layers[0].alphatest)
1573                                 ||  (shader->layers[1].blendfunc[0] == GL_ONE       && shader->layers[1].blendfunc[1] == GL_ZERO                &&  shader->layers[1].alphatest)))
1574                                 {
1575                                         // terrain blending or other effects
1576                                         shader->backgroundlayer = shader->layers + 0;
1577                                         shader->primarylayer = shader->layers + 1;
1578                                 }
1579                                 // now see if the lightmap came first, and if so choose the second texture instead
1580                                 if (!strcasecmp(shader->primarylayer->texturename[0], "$lightmap"))
1581                                 {
1582                                         shader->backgroundlayer = NULL;
1583                                         shader->primarylayer = shader->layers + 1;
1584                                 }
1585                         }
1586                         // fix up multiple reflection types
1587                         if(shader->textureflags & Q3TEXTUREFLAG_WATERSHADER)
1588                                 shader->textureflags &= ~(Q3TEXTUREFLAG_REFRACTION | Q3TEXTUREFLAG_REFLECTION);
1589                 }
1590                 Mem_Free(f);
1591         }
1592 }
1593
1594 q3shaderinfo_t *Mod_LookupQ3Shader(const char *name)
1595 {
1596         int i;
1597         for (i = 0;i < q3shaders_numshaders;i++)
1598                 if (!strcasecmp(q3shaders_shaders[i].name, name))
1599                         return q3shaders_shaders + i;
1600         return NULL;
1601 }
1602
1603 extern cvar_t r_picmipworld;
1604 qboolean Mod_LoadTextureFromQ3Shader(texture_t *texture, const char *name, qboolean q1bsp, qboolean q3bsp, qboolean md3)
1605 {
1606         int j;
1607         int texflags;
1608         qboolean success = true;
1609         q3shaderinfo_t *shader;
1610         strlcpy(texture->name, name, sizeof(texture->name));
1611         shader = name[0] ? Mod_LookupQ3Shader(name) : NULL;
1612         if (shader)
1613         {
1614                 if (developer.integer >= 100)
1615                         Con_DPrintf("%s: loaded shader for %s\n", loadmodel->name, name);
1616                 texture->surfaceparms = shader->surfaceparms;
1617                 texture->textureflags = shader->textureflags;
1618                 texture->basematerialflags = 0;
1619                 if (shader->surfaceparms & Q3SURFACEPARM_SKY)
1620                 {
1621                         texture->basematerialflags |= MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
1622                         if (shader->skyboxname[0])
1623                         {
1624                                 // quake3 seems to append a _ to the skybox name, so this must do so as well
1625                                 dpsnprintf(loadmodel->brush.skybox, sizeof(loadmodel->brush.skybox), "%s_", shader->skyboxname);
1626                         }
1627                 }
1628                 else if ((texture->surfaceflags & Q3SURFACEFLAG_NODRAW) || shader->numlayers == 0)
1629                         texture->basematerialflags |= MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
1630                 else if (shader->surfaceparms & Q3SURFACEPARM_LAVA)
1631                         texture->basematerialflags |= MATERIALFLAG_WATER | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOSHADOW;
1632                 else if (shader->surfaceparms & Q3SURFACEPARM_SLIME)
1633                         texture->basematerialflags |= MATERIALFLAG_WATER | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_WATERALPHA | MATERIALFLAG_NOSHADOW;
1634                 else if (shader->surfaceparms & Q3SURFACEPARM_WATER)
1635                         texture->basematerialflags |= MATERIALFLAG_WATER | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_WATERALPHA | MATERIALFLAG_NOSHADOW;
1636                 else
1637                         texture->basematerialflags |= MATERIALFLAG_WALL;
1638                 if (shader->layers[0].alphatest)
1639                         texture->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
1640                 if (shader->textureflags & Q3TEXTUREFLAG_TWOSIDED)
1641                         texture->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_NOCULLFACE;
1642                 if (shader->textureflags & Q3TEXTUREFLAG_POLYGONOFFSET)
1643                         texture->basepolygonoffset -= 2;
1644                 if (shader->textureflags & Q3TEXTUREFLAG_REFRACTION)
1645                         texture->basematerialflags |= MATERIALFLAG_REFRACTION;
1646                 if (shader->textureflags & Q3TEXTUREFLAG_REFLECTION)
1647                         texture->basematerialflags |= MATERIALFLAG_REFLECTION;
1648                 if (shader->textureflags & Q3TEXTUREFLAG_WATERSHADER)
1649                         texture->basematerialflags |= MATERIALFLAG_WATERSHADER;
1650                 texture->customblendfunc[0] = GL_ONE;
1651                 texture->customblendfunc[1] = GL_ZERO;
1652                 if (shader->numlayers > 0)
1653                 {
1654                         texture->customblendfunc[0] = shader->layers[0].blendfunc[0];
1655                         texture->customblendfunc[1] = shader->layers[0].blendfunc[1];
1656 /*
1657 Q3 shader blendfuncs actually used in the game (* = supported by DP)
1658 * additive               GL_ONE GL_ONE
1659 additive weird         GL_ONE GL_SRC_ALPHA
1660 additive weird 2       GL_ONE GL_ONE_MINUS_SRC_ALPHA
1661 * alpha                  GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
1662 alpha inverse          GL_ONE_MINUS_SRC_ALPHA GL_SRC_ALPHA
1663 brighten               GL_DST_COLOR GL_ONE
1664 brighten               GL_ONE GL_SRC_COLOR
1665 brighten weird         GL_DST_COLOR GL_ONE_MINUS_DST_ALPHA
1666 brighten weird 2       GL_DST_COLOR GL_SRC_ALPHA
1667 * modulate               GL_DST_COLOR GL_ZERO
1668 * modulate               GL_ZERO GL_SRC_COLOR
1669 modulate inverse       GL_ZERO GL_ONE_MINUS_SRC_COLOR
1670 modulate inverse alpha GL_ZERO GL_SRC_ALPHA
1671 modulate weird inverse GL_ONE_MINUS_DST_COLOR GL_ZERO
1672 * modulate x2            GL_DST_COLOR GL_SRC_COLOR
1673 * no blend               GL_ONE GL_ZERO
1674 nothing                GL_ZERO GL_ONE
1675 */
1676                         // if not opaque, figure out what blendfunc to use
1677                         if (shader->layers[0].blendfunc[0] != GL_ONE || shader->layers[0].blendfunc[1] != GL_ZERO)
1678                         {
1679                                 if (shader->layers[0].blendfunc[0] == GL_ONE && shader->layers[0].blendfunc[1] == GL_ONE)
1680                                         texture->basematerialflags |= MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1681                                 else if (shader->layers[0].blendfunc[0] == GL_SRC_ALPHA && shader->layers[0].blendfunc[1] == GL_ONE)
1682                                         texture->basematerialflags |= MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1683                                 else if (shader->layers[0].blendfunc[0] == GL_SRC_ALPHA && shader->layers[0].blendfunc[1] == GL_ONE_MINUS_SRC_ALPHA)
1684                                         texture->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1685                                 else
1686                                         texture->basematerialflags |= MATERIALFLAG_CUSTOMBLEND | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
1687                         }
1688                 }
1689                 if (!shader->lighting)
1690                         texture->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
1691                 if (shader->primarylayer)
1692                 {
1693                         // copy over many shader->primarylayer parameters
1694                         texture->rgbgen = shader->primarylayer->rgbgen;
1695                         texture->alphagen = shader->primarylayer->alphagen;
1696                         texture->tcgen = shader->primarylayer->tcgen;
1697                         memcpy(texture->tcmods, shader->primarylayer->tcmods, sizeof(texture->tcmods));
1698                         // load the textures
1699                         texture->numskinframes = shader->primarylayer->numframes;
1700                         texture->skinframerate = shader->primarylayer->framerate;
1701                         for (j = 0;j < shader->primarylayer->numframes;j++)
1702                         {
1703                                 texflags = TEXF_ALPHA | TEXF_PRECACHE;
1704                                 if (!(shader->surfaceparms & Q3SURFACEPARM_NOMIPMAPS))
1705                                         texflags |= TEXF_MIPMAP;
1706                                 if (!(shader->textureflags & Q3TEXTUREFLAG_NOPICMIP) && ((!q1bsp && !q3bsp) || r_picmipworld.integer))
1707                                         texflags |= TEXF_PICMIP | TEXF_COMPRESS;
1708                                 if (shader->primarylayer->clampmap)
1709                                         texflags |= TEXF_CLAMP;
1710                                 if (!(texture->skinframes[j] = R_SkinFrame_LoadExternal(shader->primarylayer->texturename[j], texflags, false)))
1711                                 {
1712                                         Con_Printf("^1%s:^7 could not load texture ^3\"%s\"^7 (frame %i) for shader ^2\"%s\"\n", loadmodel->name, shader->primarylayer->texturename[j], j, texture->name);
1713                                         texture->skinframes[j] = R_SkinFrame_LoadMissing();
1714                                 }
1715                         }
1716                 }
1717                 if (shader->backgroundlayer)
1718                 {
1719                         texture->backgroundnumskinframes = shader->backgroundlayer->numframes;
1720                         texture->backgroundskinframerate = shader->backgroundlayer->framerate;
1721                         for (j = 0;j < shader->backgroundlayer->numframes;j++)
1722                         {
1723                                 if (!(texture->backgroundskinframes[j] = R_SkinFrame_LoadExternal(shader->backgroundlayer->texturename[j], ((shader->surfaceparms & Q3SURFACEPARM_NOMIPMAPS) ? 0 : TEXF_MIPMAP) | TEXF_ALPHA | TEXF_PRECACHE | ((!r_picmipworld.integer || (shader->textureflags & Q3TEXTUREFLAG_NOPICMIP)) ? 0 : (TEXF_PICMIP | TEXF_COMPRESS)) | (shader->backgroundlayer->clampmap ? TEXF_CLAMP : 0), false)))
1724                                 {
1725                                         Con_Printf("^1%s:^7 could not load texture ^3\"%s\"^7 (frame %i) for shader ^2\"%s\"\n", loadmodel->name, shader->backgroundlayer->texturename[j], j, texture->name);
1726                                         texture->backgroundskinframes[j] = R_SkinFrame_LoadMissing();
1727                                 }
1728                         }
1729                 }
1730                 memcpy(texture->deforms, shader->deforms, sizeof(texture->deforms));
1731                 texture->reflectmin = shader->reflectmin;
1732                 texture->reflectmax = shader->reflectmax;
1733                 texture->refractfactor = shader->refractfactor;
1734                 Vector4Copy(shader->refractcolor4f, texture->refractcolor4f);
1735                 texture->reflectfactor = shader->reflectfactor;
1736                 Vector4Copy(shader->reflectcolor4f, texture->reflectcolor4f);
1737         }
1738         else if (!strcmp(texture->name, "noshader"))
1739         {
1740                 if (developer.integer >= 100)
1741                         Con_DPrintf("%s: using default handler for %s\n", loadmodel->name, name);
1742                 texture->surfaceparms = 0;
1743         }
1744         else
1745         {
1746                 success = false;
1747                 if (developer.integer >= 100 || loadmodel->type == mod_brushq3)
1748                         Con_DPrintf("%s: No shader found for texture \"%s\"\n", loadmodel->name, texture->name);
1749                 texture->surfaceparms = 0;
1750                 if (texture->surfaceflags & Q3SURFACEFLAG_NODRAW)
1751                         texture->basematerialflags |= MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
1752                 else if (texture->surfaceflags & Q3SURFACEFLAG_SKY)
1753                         texture->basematerialflags |= MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
1754                 else
1755                         texture->basematerialflags |= MATERIALFLAG_WALL;
1756                 texture->numskinframes = 1;
1757                 if (!(texture->skinframes[0] = R_SkinFrame_LoadExternal(texture->name, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false)))
1758                         if(developer.integer || q3bsp) // only the Q3BSP path provides no alternative (like loading image directly, or internal texture)
1759                                 Con_Printf("^1%s:^7 could not load texture for missing shader ^3\"%s\"\n", loadmodel->name, texture->name);
1760         }
1761         // init the animation variables
1762         texture->currentframe = texture;
1763         if (texture->numskinframes < 1)
1764                 texture->numskinframes = 1;
1765         if (!texture->skinframes[0])
1766                 texture->skinframes[0] = R_SkinFrame_LoadMissing();
1767         texture->currentskinframe = texture->skinframes[0];
1768         texture->backgroundcurrentskinframe = texture->backgroundskinframes[0];
1769         return success;
1770 }
1771
1772 skinfile_t *Mod_LoadSkinFiles(void)
1773 {
1774         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1775         char *text;
1776         const char *data;
1777         skinfile_t *skinfile = NULL, *first = NULL;
1778         skinfileitem_t *skinfileitem;
1779         char word[10][MAX_QPATH];
1780         overridetagnameset_t tagsets[MAX_SKINS];
1781         overridetagname_t tags[256];
1782
1783 /*
1784 sample file:
1785 U_bodyBox,models/players/Legoman/BikerA2.tga
1786 U_RArm,models/players/Legoman/BikerA1.tga
1787 U_LArm,models/players/Legoman/BikerA1.tga
1788 U_armor,common/nodraw
1789 U_sword,common/nodraw
1790 U_shield,common/nodraw
1791 U_homb,common/nodraw
1792 U_backpack,common/nodraw
1793 U_colcha,common/nodraw
1794 tag_head,
1795 tag_weapon,
1796 tag_torso,
1797 */
1798         memset(tagsets, 0, sizeof(tagsets));
1799         memset(word, 0, sizeof(word));
1800         for (i = 0;i < MAX_SKINS && (data = text = (char *)FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true, NULL));i++)
1801         {
1802                 numtags = 0;
1803
1804                 // If it's the first file we parse
1805                 if (skinfile == NULL)
1806                 {
1807                         skinfile = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1808                         first = skinfile;
1809                 }
1810                 else
1811                 {
1812                         skinfile->next = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1813                         skinfile = skinfile->next;
1814                 }
1815                 skinfile->next = NULL;
1816
1817                 for(line = 0;;line++)
1818                 {
1819                         // parse line
1820                         if (!COM_ParseToken_QuakeC(&data, true))
1821                                 break;
1822                         if (!strcmp(com_token, "\n"))
1823                                 continue;
1824                         words = 0;
1825                         wordsoverflow = false;
1826                         do
1827                         {
1828                                 if (words < 10)
1829                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1830                                 else
1831                                         wordsoverflow = true;
1832                         }
1833                         while (COM_ParseToken_QuakeC(&data, true) && strcmp(com_token, "\n"));
1834                         if (wordsoverflow)
1835                         {
1836                                 Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: line with too many statements, skipping\n", loadmodel->name, i, line);
1837                                 continue;
1838                         }
1839                         // words is always >= 1
1840                         if (!strcmp(word[0], "replace"))
1841                         {
1842                                 if (words == 3)
1843                                 {
1844                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1845                                         skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1846                                         skinfileitem->next = skinfile->items;
1847                                         skinfile->items = skinfileitem;
1848                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1849                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1850                                 }
1851                                 else
1852                                         Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: wrong number of parameters to command \"%s\", see documentation in DP_GFX_SKINFILES extension in dpextensions.qc\n", loadmodel->name, i, line, word[0]);
1853                         }
1854                         else if (words == 2 && !strcmp(word[1], ","))
1855                         {
1856                                 // tag name, like "tag_weapon,"
1857                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1858                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1859                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1860                                 numtags++;
1861                         }
1862                         else if (words == 3 && !strcmp(word[1], ","))
1863                         {
1864                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1865                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1866                                 skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1867                                 skinfileitem->next = skinfile->items;
1868                                 skinfile->items = skinfileitem;
1869                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1870                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1871                         }
1872                         else
1873                                 Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: does not look like tag or mesh specification, or replace command, see documentation in DP_GFX_SKINFILES extension in dpextensions.qc\n", loadmodel->name, i, line);
1874                 }
1875                 Mem_Free(text);
1876
1877                 if (numtags)
1878                 {
1879                         overridetagnameset_t *t;
1880                         t = tagsets + i;
1881                         t->num_overridetagnames = numtags;
1882                         t->data_overridetagnames = (overridetagname_t *)Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1883                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1884                         tagsetsused = true;
1885                 }
1886         }
1887         if (tagsetsused)
1888         {
1889                 loadmodel->data_overridetagnamesforskin = (overridetagnameset_t *)Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1890                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1891         }
1892         if (i)
1893                 loadmodel->numskins = i;
1894         return first;
1895 }
1896
1897 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1898 {
1899         skinfile_t *next;
1900         skinfileitem_t *skinfileitem, *nextitem;
1901         for (;skinfile;skinfile = next)
1902         {
1903                 next = skinfile->next;
1904                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1905                 {
1906                         nextitem = skinfileitem->next;
1907                         Mem_Free(skinfileitem);
1908                 }
1909                 Mem_Free(skinfile);
1910         }
1911 }
1912
1913 int Mod_CountSkinFiles(skinfile_t *skinfile)
1914 {
1915         int i;
1916         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1917         return i;
1918 }
1919
1920 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1921 {
1922         int i;
1923         double isnap = 1.0 / snap;
1924         for (i = 0;i < numvertices*numcomponents;i++)
1925                 vertices[i] = floor(vertices[i]*isnap)*snap;
1926 }
1927
1928 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1929 {
1930         int i, outtriangles;
1931         float d, edgedir[3], temp[3];
1932         // a degenerate triangle is one with no width (thickness, surface area)
1933         // these are characterized by having all 3 points colinear (along a line)
1934         // or having two points identical
1935         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1936         {
1937                 // calculate first edge
1938                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1939                 if (VectorLength2(edgedir) < 0.0001f)
1940                         continue; // degenerate first edge (no length)
1941                 VectorNormalize(edgedir);
1942                 // check if third point is on the edge (colinear)
1943                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1944                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1945                 if (VectorLength2(temp) < 0.0001f)
1946                         continue; // third point colinear with first edge
1947                 // valid triangle (no colinear points, no duplicate points)
1948                 VectorCopy(inelement3i, outelement3i);
1949                 outelement3i += 3;
1950                 outtriangles++;
1951         }
1952         return outtriangles;
1953 }
1954
1955 void Mod_VertexRangeFromElements(int numelements, const int *elements, int *firstvertexpointer, int *lastvertexpointer)
1956 {
1957         int i, e;
1958         int firstvertex, lastvertex;
1959         if (numelements > 0 && elements)
1960         {
1961                 firstvertex = lastvertex = elements[0];
1962                 for (i = 1;i < numelements;i++)
1963                 {
1964                         e = elements[i];
1965                         firstvertex = min(firstvertex, e);
1966                         lastvertex = max(lastvertex, e);
1967                 }
1968         }
1969         else
1970                 firstvertex = lastvertex = 0;
1971         if (firstvertexpointer)
1972                 *firstvertexpointer = firstvertex;
1973         if (lastvertexpointer)
1974                 *lastvertexpointer = lastvertex;
1975 }
1976
1977 static void Mod_BuildVBOs(void)
1978 {
1979         if (!gl_support_arb_vertex_buffer_object)
1980                 return;
1981
1982         // element buffer is easy because it's just one array
1983         if (loadmodel->surfmesh.num_triangles)
1984                 loadmodel->surfmesh.ebo = R_Mesh_CreateStaticBufferObject(GL_ELEMENT_ARRAY_BUFFER_ARB, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles * sizeof(int[3]), loadmodel->name);
1985
1986         // vertex buffer is several arrays and we put them in the same buffer
1987         //
1988         // is this wise?  the texcoordtexture2f array is used with dynamic
1989         // vertex/svector/tvector/normal when rendering animated models, on the
1990         // other hand animated models don't use a lot of vertices anyway...
1991         if (loadmodel->surfmesh.num_vertices)
1992         {
1993                 size_t size;
1994                 unsigned char *mem;
1995                 size = 0;
1996                 loadmodel->surfmesh.vbooffset_vertex3f           = size;if (loadmodel->surfmesh.data_vertex3f          ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
1997                 loadmodel->surfmesh.vbooffset_svector3f          = size;if (loadmodel->surfmesh.data_svector3f         ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
1998                 loadmodel->surfmesh.vbooffset_tvector3f          = size;if (loadmodel->surfmesh.data_tvector3f         ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
1999                 loadmodel->surfmesh.vbooffset_normal3f           = size;if (loadmodel->surfmesh.data_normal3f          ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
2000                 loadmodel->surfmesh.vbooffset_texcoordtexture2f  = size;if (loadmodel->surfmesh.data_texcoordtexture2f ) size += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
2001                 loadmodel->surfmesh.vbooffset_texcoordlightmap2f = size;if (loadmodel->surfmesh.data_texcoordlightmap2f) size += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
2002                 loadmodel->surfmesh.vbooffset_lightmapcolor4f    = size;if (loadmodel->surfmesh.data_lightmapcolor4f   ) size += loadmodel->surfmesh.num_vertices * sizeof(float[4]);
2003                 mem = (unsigned char *)Mem_Alloc(tempmempool, size);
2004                 if (loadmodel->surfmesh.data_vertex3f          ) memcpy(mem + loadmodel->surfmesh.vbooffset_vertex3f          , loadmodel->surfmesh.data_vertex3f          , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
2005                 if (loadmodel->surfmesh.data_svector3f         ) memcpy(mem + loadmodel->surfmesh.vbooffset_svector3f         , loadmodel->surfmesh.data_svector3f         , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
2006                 if (loadmodel->surfmesh.data_tvector3f         ) memcpy(mem + loadmodel->surfmesh.vbooffset_tvector3f         , loadmodel->surfmesh.data_tvector3f         , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
2007                 if (loadmodel->surfmesh.data_normal3f          ) memcpy(mem + loadmodel->surfmesh.vbooffset_normal3f          , loadmodel->surfmesh.data_normal3f          , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
2008                 if (loadmodel->surfmesh.data_texcoordtexture2f ) memcpy(mem + loadmodel->surfmesh.vbooffset_texcoordtexture2f , loadmodel->surfmesh.data_texcoordtexture2f , loadmodel->surfmesh.num_vertices * sizeof(float[2]));
2009                 if (loadmodel->surfmesh.data_texcoordlightmap2f) memcpy(mem + loadmodel->surfmesh.vbooffset_texcoordlightmap2f, loadmodel->surfmesh.data_texcoordlightmap2f, loadmodel->surfmesh.num_vertices * sizeof(float[2]));
2010                 if (loadmodel->surfmesh.data_lightmapcolor4f   ) memcpy(mem + loadmodel->surfmesh.vbooffset_lightmapcolor4f   , loadmodel->surfmesh.data_lightmapcolor4f   , loadmodel->surfmesh.num_vertices * sizeof(float[4]));
2011                 loadmodel->surfmesh.vbo = R_Mesh_CreateStaticBufferObject(GL_ARRAY_BUFFER_ARB, mem, size, loadmodel->name);
2012                 Mem_Free(mem);
2013         }
2014 }