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"};
  30
  31 model_t *loadmodel;
  32
  33 // LordHavoc: increased from 512 to 2048
  34 #define MAX_MOD_KNOWN   2048
  35 static model_t mod_known[MAX_MOD_KNOWN];
  36
  37 rtexturepool_t *mod_shared_texturepool;
  38 rtexture_t *r_texture_notexture;
  39 rtexture_t *mod_shared_detailtextures[NUM_DETAILTEXTURES];
  40 rtexture_t *mod_shared_distorttexture[64];
  41
  42 void Mod_BuildDetailTextures (void)
  43 {
  44         int i, x, y, light;
  45         float vc[3], vx[3], vy[3], vn[3], lightdir[3];
  46 #define DETAILRESOLUTION 256
  47         qbyte data[DETAILRESOLUTION][DETAILRESOLUTION][4], noise[DETAILRESOLUTION][DETAILRESOLUTION];
  48         lightdir[0] = 0.5;
  49         lightdir[1] = 1;
  50         lightdir[2] = -0.25;
  51         VectorNormalize(lightdir);
  52         for (i = 0;i < NUM_DETAILTEXTURES;i++)
  53         {
  54                 fractalnoise(&noise[0][0], DETAILRESOLUTION, DETAILRESOLUTION >> 4);
  55                 for (y = 0;y < DETAILRESOLUTION;y++)
  56                 {
  57                         for (x = 0;x < DETAILRESOLUTION;x++)
  58                         {
  59                                 vc[0] = x;
  60                                 vc[1] = y;
  61                                 vc[2] = noise[y][x] * (1.0f / 32.0f);
  62                                 vx[0] = x + 1;
  63                                 vx[1] = y;
  64                                 vx[2] = noise[y][(x + 1) % DETAILRESOLUTION] * (1.0f / 32.0f);
  65                                 vy[0] = x;
  66                                 vy[1] = y + 1;
  67                                 vy[2] = noise[(y + 1) % DETAILRESOLUTION][x] * (1.0f / 32.0f);
  68                                 VectorSubtract(vx, vc, vx);
  69                                 VectorSubtract(vy, vc, vy);
  70                                 CrossProduct(vx, vy, vn);
  71                                 VectorNormalize(vn);
  72                                 light = 128 - DotProduct(vn, lightdir) * 128;
  73                                 light = bound(0, light, 255);
  74                                 data[y][x][0] = data[y][x][1] = data[y][x][2] = light;
  75                                 data[y][x][3] = 255;
  76                         }
  77                 }
  78                 mod_shared_detailtextures[i] = R_LoadTexture2D(mod_shared_texturepool, va("detailtexture%i", i), DETAILRESOLUTION, DETAILRESOLUTION, &data[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP | TEXF_PRECACHE, NULL);
  79         }
  80 }
  81
  82 qbyte Mod_MorphDistortTexture (double y0, double y1, double y2, double y3, double morph)
  83 {
  84         int     value = (int)(((y1 + y3 - (y0 + y2)) * morph * morph * morph) +
  85                                 ((2 * (y0 - y1) + y2 - y3) * morph * morph) +
  86                                 ((y2 - y0) * morph) +
  87                                 (y1));
  88
  89         if (value > 255)
  90                 value = 255;
  91         if (value < 0)
  92                 value = 0;
  93
  94         return (qbyte)value;
  95 }
  96
  97 void Mod_BuildDistortTexture (void)
  98 {
  99         int x, y, i, j;
 100 #define DISTORTRESOLUTION 32
 101         qbyte data[5][DISTORTRESOLUTION][DISTORTRESOLUTION][2];
 102
 103         for (i=0; i<4; i++)
 104         {
 105                 for (y=0; y<DISTORTRESOLUTION; y++)
 106                 {
 107                         for (x=0; x<DISTORTRESOLUTION; x++)
 108                         {
 109                                 data[i][y][x][0] = rand () & 255;
 110                                 data[i][y][x][1] = rand () & 255;
 111                         }
 112                 }
 113         }
 114
 115
 116         for (i=0; i<4; i++)
 117         {
 118                 for (j=0; j<16; j++)
 119                 {
 120                         mod_shared_distorttexture[i*16+j] = NULL;
 121                         if (gl_textureshader)
 122                         {
 123                                 for (y=0; y<DISTORTRESOLUTION; y++)
 124                                 {
 125                                         for (x=0; x<DISTORTRESOLUTION; x++)
 126                                         {
 127                                                 data[4][y][x][0] = Mod_MorphDistortTexture (data[(i-1)&3][y][x][0], data[i][y][x][0], data[(i+1)&3][y][x][0], data[(i+2)&3][y][x][0], 0.0625*j);
 128                                                 data[4][y][x][1] = Mod_MorphDistortTexture (data[(i-1)&3][y][x][1], data[i][y][x][1], data[(i+1)&3][y][x][1], data[(i+2)&3][y][x][1], 0.0625*j);
 129                                         }
 130                                 }
 131                                 mod_shared_distorttexture[i*16+j] = R_LoadTexture2D(mod_shared_texturepool, va("distorttexture%i", i*16+j), DISTORTRESOLUTION, DISTORTRESOLUTION, &data[4][0][0][0], TEXTYPE_DSDT, TEXF_PRECACHE, NULL);
 132                         }
 133                 }
 134         }
 135
 136         return;
 137 }
 138
 139 void Mod_SetupNoTexture(void)
 140 {
 141 }
 142
 143 static void mod_start(void)
 144 {
 145         int i;
 146         for (i = 0;i < MAX_MOD_KNOWN;i++)
 147                 if (mod_known[i].name[0])
 148                         Mod_UnloadModel(&mod_known[i]);
 149         Mod_LoadModels();
 150
 151         mod_shared_texturepool = R_AllocTexturePool();
 152         Mod_SetupNoTexture();
 153         Mod_BuildDetailTextures();
 154         Mod_BuildDistortTexture();
 155 }
 156
 157 static void mod_shutdown(void)
 158 {
 159         int i;
 160         for (i = 0;i < MAX_MOD_KNOWN;i++)
 161                 if (mod_known[i].name[0])
 162                         Mod_UnloadModel(&mod_known[i]);
 163
 164         R_FreeTexturePool(&mod_shared_texturepool);
 165 }
 166
 167 static void mod_newmap(void)
 168 {
 169         msurface_t *surface;
 170         int i, surfacenum, ssize, tsize;
 171
 172         if (!cl_stainmaps_clearonload.integer)
 173                 return;
 174
 175         for (i = 0;i < MAX_MOD_KNOWN;i++)
 176         {
 177                 if (mod_known[i].name[0])
 178                 {
 179                         for (surfacenum = 0, surface = mod_known[i].brush.data_surfaces;surfacenum < mod_known[i].brush.num_surfaces;surfacenum++, surface++)
 180                         {
 181                                 if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
 182                                 {
 183                                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
 184                                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
 185                                         memset(surface->lightmapinfo->stainsamples, 255, ssize * tsize * 3);
 186                                         surface->cached_dlight = true;
 187                                 }
 188                         }
 189                 }
 190         }
 191 }
 192
 193 /*
 194 ===============
 195 Mod_Init
 196 ===============
 197 */
 198 static void Mod_Print(void);
 199 static void Mod_Precache (void);
 200 void Mod_Init (void)
 201 {
 202         Mod_BrushInit();
 203         Mod_AliasInit();
 204         Mod_SpriteInit();
 205
 206         Cvar_RegisterVariable(&r_mipskins);
 207         Cmd_AddCommand ("modellist", Mod_Print);
 208         Cmd_AddCommand ("modelprecache", Mod_Precache);
 209 }
 210
 211 void Mod_RenderInit(void)
 212 {
 213         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 214 }
 215
 216 void Mod_FreeModel (model_t *mod)
 217 {
 218         R_FreeTexturePool(&mod->texturepool);
 219         Mem_FreePool(&mod->mempool);
 220
 221         // clear the struct to make it available
 222         memset(mod, 0, sizeof(model_t));
 223 }
 224
 225 void Mod_UnloadModel (model_t *mod)
 226 {
 227         char name[MAX_QPATH];
 228         qboolean isworldmodel;
 229         strcpy(name, mod->name);
 230         isworldmodel = mod->isworldmodel;
 231         Mod_FreeModel(mod);
 232         strcpy(mod->name, name);
 233         mod->isworldmodel = isworldmodel;
 234         mod->loaded = false;
 235 }
 236
 237 /*
 238 ==================
 239 Mod_LoadModel
 240
 241 Loads a model
 242 ==================
 243 */
 244 static model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 245 {
 246         int num;
 247         unsigned int crc;
 248         void *buf;
 249
 250         mod->used = true;
 251
 252         if (mod->name[0] == '*') // submodel
 253                 return mod;
 254
 255         crc = 0;
 256         buf = NULL;
 257         if (mod->isworldmodel != isworldmodel)
 258                 mod->loaded = false;
 259         if (!mod->loaded || checkdisk)
 260         {
 261                 if (checkdisk && mod->loaded)
 262                         Con_DPrintf("checking model %s\n", mod->name);
 263                 buf = FS_LoadFile (mod->name, tempmempool, false);
 264                 if (buf)
 265                 {
 266                         crc = CRC_Block(buf, fs_filesize);
 267                         if (mod->crc != crc)
 268                                 mod->loaded = false;
 269                 }
 270         }
 271         if (mod->loaded)
 272                 return mod; // already loaded
 273
 274         Con_DPrintf("loading model %s\n", mod->name);
 275         // LordHavoc: unload the existing model in this slot (if there is one)
 276         Mod_UnloadModel(mod);
 277
 278         // load the model
 279         mod->isworldmodel = isworldmodel;
 280         mod->used = true;
 281         mod->crc = crc;
 282         // errors can prevent the corresponding mod->loaded = true;
 283         mod->loaded = false;
 284
 285         // default model radius and bounding box (mainly for missing models)
 286         mod->radius = 16;
 287         VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
 288         VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
 289         VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
 290         VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
 291         VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
 292         VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 293
 294         // all models use memory, so allocate a memory pool
 295         mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 296         // all models load textures, so allocate a texture pool
 297         if (cls.state != ca_dedicated)
 298                 mod->texturepool = R_AllocTexturePool();
 299
 300         if (buf)
 301         {
 302                 num = LittleLong(*((int *)buf));
 303                 // call the apropriate loader
 304                 loadmodel = mod;
 305                      if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf);
 306                 else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf);
 307                 else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf);
 308                 else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf);
 309                 else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf);
 310                 else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf);
 311                 else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf);
 312                 else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf);
 313                 else Host_Error("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 314                 Mem_Free(buf);
 315         }
 316         else if (crash)
 317         {
 318                 // LordHavoc: Sys_Error was *ANNOYING*
 319                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 320         }
 321
 322         // no errors occurred
 323         mod->loaded = true;
 324         return mod;
 325 }
 326
 327 void Mod_CheckLoaded(model_t *mod)
 328 {
 329         if (mod)
 330         {
 331                 if (!mod->loaded)
 332                         Mod_LoadModel(mod, true, true, mod->isworldmodel);
 333                 else
 334                 {
 335                         //if (mod->type == mod_invalid)
 336                         //      Host_Error("Mod_CheckLoaded: invalid model\n");
 337                         mod->used = true;
 338                         return;
 339                 }
 340         }
 341 }
 342
 343 /*
 344 ===================
 345 Mod_ClearAll
 346 ===================
 347 */
 348 void Mod_ClearAll(void)
 349 {
 350 }
 351
 352 void Mod_ClearUsed(void)
 353 {
 354         int i;
 355         model_t *mod;
 356
 357         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 358                 if (mod->name[0])
 359                         mod->used = false;
 360 }
 361
 362 void Mod_PurgeUnused(void)
 363 {
 364         int i;
 365         model_t *mod;
 366
 367         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 368                 if (mod->name[0])
 369                         if (!mod->used)
 370                                 Mod_FreeModel(mod);
 371 }
 372
 373 // only used during loading!
 374 void Mod_RemoveStaleWorldModels(model_t *skip)
 375 {
 376         int i;
 377         for (i = 0;i < MAX_MOD_KNOWN;i++)
 378                 if (mod_known[i].isworldmodel && skip != &mod_known[i])
 379                         Mod_UnloadModel(mod_known + i);
 380 }
 381
 382 void Mod_LoadModels(void)
 383 {
 384         int i;
 385         model_t *mod;
 386
 387         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 388                 if (mod->name[0])
 389                         if (mod->used)
 390                                 Mod_CheckLoaded(mod);
 391 }
 392
 393 /*
 394 ==================
 395 Mod_FindName
 396
 397 ==================
 398 */
 399 model_t *Mod_FindName(const char *name)
 400 {
 401         int i;
 402         model_t *mod, *freemod;
 403
 404         if (!name[0])
 405                 Host_Error ("Mod_ForName: NULL name");
 406
 407 // search the currently loaded models
 408         freemod = NULL;
 409         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 410         {
 411                 if (mod->name[0])
 412                 {
 413                         if (!strcmp (mod->name, name))
 414                         {
 415                                 mod->used = true;
 416                                 return mod;
 417                         }
 418                 }
 419                 else if (freemod == NULL)
 420                         freemod = mod;
 421         }
 422
 423         if (freemod)
 424         {
 425                 mod = freemod;
 426                 strcpy (mod->name, name);
 427                 mod->loaded = false;
 428                 mod->used = true;
 429                 return mod;
 430         }
 431
 432         Host_Error ("Mod_FindName: ran out of models\n");
 433         return NULL;
 434 }
 435
 436 /*
 437 ==================
 438 Mod_ForName
 439
 440 Loads in a model for the given name
 441 ==================
 442 */
 443 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 444 {
 445         return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
 446 }
 447
 448 qbyte *mod_base;
 449
 450
 451 //=============================================================================
 452
 453 /*
 454 ================
 455 Mod_Print
 456 ================
 457 */
 458 static void Mod_Print(void)
 459 {
 460         int             i;
 461         model_t *mod;
 462
 463         Con_Print("Loaded models:\n");
 464         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 465                 if (mod->name[0])
 466                         Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 467 }
 468
 469 /*
 470 ================
 471 Mod_Precache
 472 ================
 473 */
 474 static void Mod_Precache(void)
 475 {
 476         if (Cmd_Argc() == 2)
 477                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 478         else
 479                 Con_Print("usage: modelprecache <filename>\n");
 480 }
 481
 482 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 483 {
 484         int i, count;
 485         qbyte *used;
 486         used = Mem_Alloc(tempmempool, numvertices);
 487         memset(used, 0, numvertices);
 488         for (i = 0;i < numelements;i++)
 489                 used[elements[i]] = 1;
 490         for (i = 0, count = 0;i < numvertices;i++)
 491                 remapvertices[i] = used[i] ? count++ : -1;
 492         Mem_Free(used);
 493         return count;
 494 }
 495
 496 #if 1
 497 // fast way, using an edge hash
 498 #define TRIANGLEEDGEHASH 16384
 499 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 500 {
 501         int i, j, p, e1, e2, *n, hashindex, count, match;
 502         const int *e;
 503         typedef struct edgehashentry_s
 504         {
 505                 struct edgehashentry_s *next;
 506                 int triangle;
 507                 int element[2];
 508         }
 509         edgehashentry_t;
 510         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 511         memset(edgehash, 0, sizeof(edgehash));
 512         edgehashentries = edgehashentriesbuffer;
 513         // if there are too many triangles for the stack array, allocate larger buffer
 514         if (numtriangles > TRIANGLEEDGEHASH)
 515                 edgehashentries = Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 516         // find neighboring triangles
 517         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 518         {
 519                 for (j = 0, p = 2;j < 3;p = j, j++)
 520                 {
 521                         e1 = e[p];
 522                         e2 = e[j];
 523                         // this hash index works for both forward and backward edges
 524                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 525                         hash = edgehashentries + i * 3 + j;
 526                         hash->next = edgehash[hashindex];
 527                         edgehash[hashindex] = hash;
 528                         hash->triangle = i;
 529                         hash->element[0] = e1;
 530                         hash->element[1] = e2;
 531                 }
 532         }
 533         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 534         {
 535                 for (j = 0, p = 2;j < 3;p = j, j++)
 536                 {
 537                         e1 = e[p];
 538                         e2 = e[j];
 539                         // this hash index works for both forward and backward edges
 540                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 541                         count = 0;
 542                         match = -1;
 543                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 544                         {
 545                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 546                                 {
 547                                         if (hash->triangle != i)
 548                                                 match = hash->triangle;
 549                                         count++;
 550                                 }
 551                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 552                                         count++;
 553                         }
 554                         // detect edges shared by three triangles and make them seams
 555                         if (count > 2)
 556                                 match = -1;
 557                         n[p] = match;
 558                 }
 559         }
 560         // free the allocated buffer
 561         if (edgehashentries != edgehashentriesbuffer)
 562                 Mem_Free(edgehashentries);
 563 }
 564 #else
 565 // very slow but simple way
 566 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 567 {
 568         int i, match, count;
 569         count = 0;
 570         match = -1;
 571         for (i = 0;i < numtriangles;i++, elements += 3)
 572         {
 573                      if ((elements[0] == start && elements[1] == end)
 574                       || (elements[1] == start && elements[2] == end)
 575                       || (elements[2] == start && elements[0] == end))
 576                 {
 577                         if (i != ignore)
 578                                 match = i;
 579                         count++;
 580                 }
 581                 else if ((elements[1] == start && elements[0] == end)
 582                       || (elements[2] == start && elements[1] == end)
 583                       || (elements[0] == start && elements[2] == end))
 584                         count++;
 585         }
 586         // detect edges shared by three triangles and make them seams
 587         if (count > 2)
 588                 match = -1;
 589         return match;
 590 }
 591
 592 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 593 {
 594         int i, *n;
 595         const int *e;
 596         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 597         {
 598                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 599                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 600                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 601         }
 602 }
 603 #endif
 604
 605 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 606 {
 607         int i;
 608         for (i = 0;i < numtriangles * 3;i++)
 609                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 610                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 611 }
 612
 613 // warning: this is an expensive function!
 614 void Mod_BuildNormals(int numverts, int numtriangles, const float *vertex3f, const int *elements, float *normal3f)
 615 {
 616         int i, tnum;
 617         float normal[3], *v;
 618         const int *e;
 619         // clear the vectors
 620         memset(normal3f, 0, numverts * sizeof(float[3]));
 621         // process each vertex of each triangle and accumulate the results
 622         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 623         {
 624                 TriangleNormal(vertex3f + e[0] * 3, vertex3f + e[1] * 3, vertex3f + e[2] * 3, normal);
 625                 VectorNormalize(normal);
 626                 v = normal3f + e[0] * 3;
 627                 v[0] += normal[0];
 628                 v[1] += normal[1];
 629                 v[2] += normal[2];
 630                 v = normal3f + e[1] * 3;
 631                 v[0] += normal[0];
 632                 v[1] += normal[1];
 633                 v[2] += normal[2];
 634                 v = normal3f + e[2] * 3;
 635                 v[0] += normal[0];
 636                 v[1] += normal[1];
 637                 v[2] += normal[2];
 638         }
 639         // now we could divide the vectors by the number of averaged values on
 640         // each vertex...  but instead normalize them
 641         for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 642                 VectorNormalize(v);
 643 }
 644
 645 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)
 646 {
 647         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 648         // 103 add/sub/negate/multiply (1 cycle), 3 divide (20 cycle), 3 sqrt (22 cycle), 4 compare (3 cycle?), total cycles not counting load/store/exchange roughly 241 cycles
 649         // 12 add, 28 subtract, 57 multiply, 3 divide, 3 sqrt, 4 compare, 50% chance of 6 negates
 650
 651         // 6 multiply, 9 subtract
 652         VectorSubtract(v1, v0, v10);
 653         VectorSubtract(v2, v0, v20);
 654         normal3f[0] = v10[1] * v20[2] - v10[2] * v20[1];
 655         normal3f[1] = v10[2] * v20[0] - v10[0] * v20[2];
 656         normal3f[2] = v10[0] * v20[1] - v10[1] * v20[0];
 657         // 1 sqrt, 1 divide, 6 multiply, 2 add, 1 compare
 658         VectorNormalize(normal3f);
 659         // 12 multiply, 10 subtract
 660         tc10[1] = tc1[1] - tc0[1];
 661         tc20[1] = tc2[1] - tc0[1];
 662         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 663         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 664         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 665         tc10[0] = tc1[0] - tc0[0];
 666         tc20[0] = tc2[0] - tc0[0];
 667         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 668         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 669         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 670         // 12 multiply, 4 add, 6 subtract
 671         f = DotProduct(svector3f, normal3f);
 672         svector3f[0] -= f * normal3f[0];
 673         svector3f[1] -= f * normal3f[1];
 674         svector3f[2] -= f * normal3f[2];
 675         f = DotProduct(tvector3f, normal3f);
 676         tvector3f[0] -= f * normal3f[0];
 677         tvector3f[1] -= f * normal3f[1];
 678         tvector3f[2] -= f * normal3f[2];
 679         // 2 sqrt, 2 divide, 12 multiply, 4 add, 2 compare
 680         VectorNormalize(svector3f);
 681         VectorNormalize(tvector3f);
 682         // if texture is mapped the wrong way (counterclockwise), the tangents
 683         // have to be flipped, this is detected by calculating a normal from the
 684         // two tangents, and seeing if it is opposite the surface normal
 685         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 686         CrossProduct(tvector3f, svector3f, tangentcross);
 687         if (DotProduct(tangentcross, normal3f) < 0)
 688         {
 689                 VectorNegate(svector3f, svector3f);
 690                 VectorNegate(tvector3f, tvector3f);
 691         }
 692 }
 693
 694 // warning: this is a very expensive function!
 695 void Mod_BuildTextureVectorsAndNormals(int numverts, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f)
 696 {
 697         int i, tnum;
 698         float sdir[3], tdir[3], normal[3], *v;
 699         const int *e;
 700         // clear the vectors
 701         if (svector3f)
 702                 memset(svector3f, 0, numverts * sizeof(float[3]));
 703         if (tvector3f)
 704                 memset(tvector3f, 0, numverts * sizeof(float[3]));
 705         if (normal3f)
 706                 memset(normal3f, 0, numverts * sizeof(float[3]));
 707         // process each vertex of each triangle and accumulate the results
 708         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 709         {
 710                 Mod_BuildBumpVectors(vertex3f + e[0] * 3, vertex3f + e[1] * 3, vertex3f + e[2] * 3, texcoord2f + e[0] * 2, texcoord2f + e[1] * 2, texcoord2f + e[2] * 2, sdir, tdir, normal);
 711                 if (svector3f)
 712                 {
 713                         for (i = 0;i < 3;i++)
 714                         {
 715                                 svector3f[e[i]*3  ] += sdir[0];
 716                                 svector3f[e[i]*3+1] += sdir[1];
 717                                 svector3f[e[i]*3+2] += sdir[2];
 718                         }
 719                 }
 720                 if (tvector3f)
 721                 {
 722                         for (i = 0;i < 3;i++)
 723                         {
 724                                 tvector3f[e[i]*3  ] += tdir[0];
 725                                 tvector3f[e[i]*3+1] += tdir[1];
 726                                 tvector3f[e[i]*3+2] += tdir[2];
 727                         }
 728                 }
 729                 if (normal3f)
 730                 {
 731                         for (i = 0;i < 3;i++)
 732                         {
 733                                 normal3f[e[i]*3  ] += normal[0];
 734                                 normal3f[e[i]*3+1] += normal[1];
 735                                 normal3f[e[i]*3+2] += normal[2];
 736                         }
 737                 }
 738         }
 739         // now we could divide the vectors by the number of averaged values on
 740         // each vertex...  but instead normalize them
 741         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 742         if (svector3f)
 743                 for (i = 0, v = svector3f;i < numverts;i++, v += 3)
 744                         VectorNormalize(v);
 745         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 746         if (tvector3f)
 747                 for (i = 0, v = tvector3f;i < numverts;i++, v += 3)
 748                         VectorNormalize(v);
 749         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 750         if (normal3f)
 751                 for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 752                         VectorNormalize(v);
 753 }
 754
 755 surfmesh_t *Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean detailtexcoords, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 756 {
 757         surfmesh_t *mesh;
 758         qbyte *data;
 759         mesh = Mem_Alloc(mempool, sizeof(surfmesh_t) + numvertices * (3 + 3 + 3 + 3 + 2 + 2 + (detailtexcoords ? 2 : 0) + (vertexcolors ? 4 : 0)) * sizeof(float) + numvertices * (lightmapoffsets ? 1 : 0) * sizeof(int) + numtriangles * (3 + (neighbors ? 3 : 0)) * sizeof(int));
 760         mesh->num_vertices = numvertices;
 761         mesh->num_triangles = numtriangles;
 762         data = (qbyte *)(mesh + 1);
 763         if (mesh->num_vertices)
 764         {
 765                 mesh->data_vertex3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 766                 mesh->data_svector3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 767                 mesh->data_tvector3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 768                 mesh->data_normal3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 769                 mesh->data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 770                 mesh->data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 771                 if (detailtexcoords)
 772                         mesh->data_texcoorddetail2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 773                 if (vertexcolors)
 774                         mesh->data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * mesh->num_vertices;
 775                 if (lightmapoffsets)
 776                         mesh->data_lightmapoffsets = (int *)data, data += sizeof(int) * mesh->num_vertices;
 777         }
 778         if (mesh->num_triangles)
 779         {
 780                 mesh->data_element3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
 781                 if (neighbors)
 782                         mesh->data_neighbor3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
 783         }
 784         return mesh;
 785 }
 786
 787 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)
 788 {
 789         shadowmesh_t *newmesh;
 790         qbyte *data;
 791         int size;
 792         size = sizeof(shadowmesh_t);
 793         size += maxverts * sizeof(float[3]);
 794         if (light)
 795                 size += maxverts * sizeof(float[11]);
 796         size += maxtriangles * sizeof(int[3]);
 797         if (neighbors)
 798                 size += maxtriangles * sizeof(int[3]);
 799         if (expandable)
 800                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 801         data = Mem_Alloc(mempool, size);
 802         newmesh = (void *)data;data += sizeof(*newmesh);
 803         newmesh->map_diffuse = map_diffuse;
 804         newmesh->map_specular = map_specular;
 805         newmesh->map_normal = map_normal;
 806         newmesh->maxverts = maxverts;
 807         newmesh->maxtriangles = maxtriangles;
 808         newmesh->numverts = 0;
 809         newmesh->numtriangles = 0;
 810
 811         newmesh->vertex3f = (void *)data;data += maxverts * sizeof(float[3]);
 812         if (light)
 813         {
 814                 newmesh->svector3f = (void *)data;data += maxverts * sizeof(float[3]);
 815                 newmesh->tvector3f = (void *)data;data += maxverts * sizeof(float[3]);
 816                 newmesh->normal3f = (void *)data;data += maxverts * sizeof(float[3]);
 817                 newmesh->texcoord2f = (void *)data;data += maxverts * sizeof(float[2]);
 818         }
 819         newmesh->element3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 820         if (neighbors)
 821         {
 822                 newmesh->neighbor3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 823         }
 824         if (expandable)
 825         {
 826                 newmesh->vertexhashtable = (void *)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 827                 newmesh->vertexhashentries = (void *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 828         }
 829         return newmesh;
 830 }
 831
 832 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 833 {
 834         shadowmesh_t *newmesh;
 835         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 836         newmesh->numverts = oldmesh->numverts;
 837         newmesh->numtriangles = oldmesh->numtriangles;
 838
 839         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 840         if (newmesh->svector3f && oldmesh->svector3f)
 841         {
 842                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 843                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 844                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 845                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 846         }
 847         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 848         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 849                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 850         return newmesh;
 851 }
 852
 853 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 854 {
 855         int hashindex, vnum;
 856         shadowmeshvertexhash_t *hash;
 857         // this uses prime numbers intentionally
 858         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 859         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 860         {
 861                 vnum = (hash - mesh->vertexhashentries);
 862                 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]))
 863                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 864                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 865                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 866                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 867                         return hash - mesh->vertexhashentries;
 868         }
 869         vnum = mesh->numverts++;
 870         hash = mesh->vertexhashentries + vnum;
 871         hash->next = mesh->vertexhashtable[hashindex];
 872         mesh->vertexhashtable[hashindex] = hash;
 873         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 874         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 875         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 876         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 877         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 878         return vnum;
 879 }
 880
 881 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 882 {
 883         if (mesh->numtriangles == 0)
 884         {
 885                 // set the properties on this empty mesh to be more favorable...
 886                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 887                 mesh->map_diffuse = map_diffuse;
 888                 mesh->map_specular = map_specular;
 889                 mesh->map_normal = map_normal;
 890         }
 891         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)
 892         {
 893                 if (mesh->next == NULL)
 894                         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);
 895                 mesh = mesh->next;
 896         }
 897         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 898         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 899         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 900         mesh->numtriangles++;
 901 }
 902
 903 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)
 904 {
 905         int i, j, e;
 906         float vbuf[3*14], *v;
 907         memset(vbuf, 0, sizeof(vbuf));
 908         for (i = 0;i < numtris;i++)
 909         {
 910                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 911                 {
 912                         e = *element3i++;
 913                         if (vertex3f)
 914                         {
 915                                 v[0] = vertex3f[e * 3 + 0];
 916                                 v[1] = vertex3f[e * 3 + 1];
 917                                 v[2] = vertex3f[e * 3 + 2];
 918                         }
 919                         if (svector3f)
 920                         {
 921                                 v[3] = svector3f[e * 3 + 0];
 922                                 v[4] = svector3f[e * 3 + 1];
 923                                 v[5] = svector3f[e * 3 + 2];
 924                         }
 925                         if (tvector3f)
 926                         {
 927                                 v[6] = tvector3f[e * 3 + 0];
 928                                 v[7] = tvector3f[e * 3 + 1];
 929                                 v[8] = tvector3f[e * 3 + 2];
 930                         }
 931                         if (normal3f)
 932                         {
 933                                 v[9] = normal3f[e * 3 + 0];
 934                                 v[10] = normal3f[e * 3 + 1];
 935                                 v[11] = normal3f[e * 3 + 2];
 936                         }
 937                         if (texcoord2f)
 938                         {
 939                                 v[12] = texcoord2f[e * 2 + 0];
 940                                 v[13] = texcoord2f[e * 2 + 1];
 941                         }
 942                 }
 943                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 944         }
 945 }
 946
 947 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)
 948 {
 949         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 950 }
 951
 952 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 953 {
 954         shadowmesh_t *mesh, *newmesh, *nextmesh;
 955         // reallocate meshs to conserve space
 956         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 957         {
 958                 nextmesh = mesh->next;
 959                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 960                 {
 961                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 962                         newmesh->next = firstmesh;
 963                         firstmesh = 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         // calculate bbox
 977         for (mesh = firstmesh;mesh;mesh = mesh->next)
 978         {
 979                 if (mesh == firstmesh)
 980                 {
 981                         VectorCopy(mesh->vertex3f, nmins);
 982                         VectorCopy(mesh->vertex3f, nmaxs);
 983                 }
 984                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 985                 {
 986                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 987                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 988                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 989                 }
 990         }
 991         // calculate center and radius
 992         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 993         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 994         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 995         nradius2 = 0;
 996         for (mesh = firstmesh;mesh;mesh = mesh->next)
 997         {
 998                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 999                 {
1000                         VectorSubtract(v, ncenter, temp);
1001                         dist2 = DotProduct(temp, temp);
1002                         if (nradius2 < dist2)
1003                                 nradius2 = dist2;
1004                 }
1005         }
1006         // return data
1007         if (mins)
1008                 VectorCopy(nmins, mins);
1009         if (maxs)
1010                 VectorCopy(nmaxs, maxs);
1011         if (center)
1012                 VectorCopy(ncenter, center);
1013         if (radius)
1014                 *radius = sqrt(nradius2);
1015 }
1016
1017 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
1018 {
1019         shadowmesh_t *nextmesh;
1020         for (;mesh;mesh = nextmesh)
1021         {
1022                 nextmesh = mesh->next;
1023                 Mem_Free(mesh);
1024         }
1025 }
1026
1027 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
1028 {
1029         int i;
1030         for (i = 0;i < width*height;i++)
1031                 if (((qbyte *)&palette[in[i]])[3] > 0)
1032                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
1033         return NULL;
1034 }
1035
1036 static int detailtexturecycle = 0;
1037 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
1038 {
1039         imageskin_t s;
1040         memset(skinframe, 0, sizeof(*skinframe));
1041         if (!image_loadskin(&s, basename))
1042                 return false;
1043         if (usedetailtexture)
1044                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
1045         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
1046         if (s.nmappixels != NULL)
1047                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
1048         if (s.glosspixels != NULL)
1049                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
1050         if (s.glowpixels != NULL && loadglowtexture)
1051                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
1052         if (s.maskpixels != NULL)
1053                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
1054         if (loadpantsandshirt)
1055         {
1056                 if (s.pantspixels != NULL)
1057                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
1058                 if (s.shirtpixels != NULL)
1059                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
1060         }
1061         image_freeskin(&s);
1062         return true;
1063 }
1064
1065 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
1066 {
1067         qbyte *temp1, *temp2;
1068         memset(skinframe, 0, sizeof(*skinframe));
1069         if (!skindata)
1070                 return false;
1071         if (usedetailtexture)
1072                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
1073         if (r_shadow_bumpscale_basetexture.value > 0)
1074         {
1075                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
1076                 temp2 = temp1 + width * height * 4;
1077                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
1078                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1079                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
1080                 Mem_Free(temp1);
1081         }
1082         if (loadglowtexture)
1083         {
1084                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
1085                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
1086                 if (loadpantsandshirt)
1087                 {
1088                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1089                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1090                         if (skinframe->pants || skinframe->shirt)
1091                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormapnofullbrights, textureflags); // no special colors
1092                 }
1093         }
1094         else
1095         {
1096                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
1097                 if (loadpantsandshirt)
1098                 {
1099                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1100                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1101                         if (skinframe->pants || skinframe->shirt)
1102                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
1103                 }
1104         }
1105         return true;
1106 }
1107
1108 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1109 {
1110         float v[3], tc[3];
1111         v[0] = ix;
1112         v[1] = iy;
1113         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1114                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1115         else
1116                 v[2] = 0;
1117         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1118         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1119         texcoord2f[0] = tc[0];
1120         texcoord2f[1] = tc[1];
1121 }
1122
1123 void Mod_GetTerrainVertexFromRGBA(const qbyte *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)
1124 {
1125         float vup[3], vdown[3], vleft[3], vright[3];
1126         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1127         float sv[3], tv[3], nl[3];
1128         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1129         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1130         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1131         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1132         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1133         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1134         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1135         VectorAdd(svector3f, sv, svector3f);
1136         VectorAdd(tvector3f, tv, tvector3f);
1137         VectorAdd(normal3f, nl, normal3f);
1138         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1139         VectorAdd(svector3f, sv, svector3f);
1140         VectorAdd(tvector3f, tv, tvector3f);
1141         VectorAdd(normal3f, nl, normal3f);
1142         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1143         VectorAdd(svector3f, sv, svector3f);
1144         VectorAdd(tvector3f, tv, tvector3f);
1145         VectorAdd(normal3f, nl, normal3f);
1146 }
1147
1148 void Mod_ConstructTerrainPatchFromRGBA(const qbyte *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)
1149 {
1150         int x, y, ix, iy, *e;
1151         e = element3i;
1152         for (y = 0;y < height;y++)
1153         {
1154                 for (x = 0;x < width;x++)
1155                 {
1156                         e[0] = (y + 1) * (width + 1) + (x + 0);
1157                         e[1] = (y + 0) * (width + 1) + (x + 0);
1158                         e[2] = (y + 1) * (width + 1) + (x + 1);
1159                         e[3] = (y + 0) * (width + 1) + (x + 0);
1160                         e[4] = (y + 0) * (width + 1) + (x + 1);
1161                         e[5] = (y + 1) * (width + 1) + (x + 1);
1162                         e += 6;
1163                 }
1164         }
1165         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1166         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1167                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1168                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1169 }
1170
1171 skinfile_t *Mod_LoadSkinFiles(void)
1172 {
1173         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1174         char *text;
1175         const char *data;
1176         skinfile_t *skinfile = NULL, *first = NULL;
1177         skinfileitem_t *skinfileitem;
1178         char word[10][MAX_QPATH];
1179         overridetagnameset_t tagsets[MAX_SKINS];
1180         overridetagname_t tags[256];
1181
1182 /*
1183 sample file:
1184 U_bodyBox,models/players/Legoman/BikerA2.tga
1185 U_RArm,models/players/Legoman/BikerA1.tga
1186 U_LArm,models/players/Legoman/BikerA1.tga
1187 U_armor,common/nodraw
1188 U_sword,common/nodraw
1189 U_shield,common/nodraw
1190 U_homb,common/nodraw
1191 U_backpack,common/nodraw
1192 U_colcha,common/nodraw
1193 tag_head,
1194 tag_weapon,
1195 tag_torso,
1196 */
1197         memset(tagsets, 0, sizeof(tagsets));
1198         memset(word, 0, sizeof(word));
1199         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true));i++)
1200         {
1201                 numtags = 0;
1202
1203                 // If it's the first file we parse
1204                 if (skinfile == NULL)
1205                 {
1206                         skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1207                         first = skinfile;
1208                 }
1209                 else
1210                 {
1211                         skinfile->next = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1212                         skinfile = skinfile->next;
1213                 }
1214                 skinfile->next = NULL;
1215
1216                 for(line = 0;;line++)
1217                 {
1218                         // parse line
1219                         if (!COM_ParseToken(&data, true))
1220                                 break;
1221                         if (!strcmp(com_token, "\n"))
1222                                 continue;
1223                         words = 0;
1224                         wordsoverflow = false;
1225                         do
1226                         {
1227                                 if (words < 10)
1228                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1229                                 else
1230                                         wordsoverflow = true;
1231                         }
1232                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1233                         if (wordsoverflow)
1234                         {
1235                                 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);
1236                                 continue;
1237                         }
1238                         // words is always >= 1
1239                         if (!strcmp(word[0], "replace"))
1240                         {
1241                                 if (words == 3)
1242                                 {
1243                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1244                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1245                                         skinfileitem->next = skinfile->items;
1246                                         skinfile->items = skinfileitem;
1247                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1248                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1249                                 }
1250                                 else
1251                                         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]);
1252                         }
1253                         else if (words == 2 && !strcmp(word[1], ","))
1254                         {
1255                                 // tag name, like "tag_weapon,"
1256                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1257                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1258                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1259                                 numtags++;
1260                         }
1261                         else if (words == 3 && !strcmp(word[1], ","))
1262                         {
1263                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1264                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1265                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1266                                 skinfileitem->next = skinfile->items;
1267                                 skinfile->items = skinfileitem;
1268                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1269                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1270                         }
1271                         else
1272                                 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);
1273                 }
1274                 Mem_Free(text);
1275
1276                 if (numtags)
1277                 {
1278                         overridetagnameset_t *t;
1279                         t = tagsets + i;
1280                         t->num_overridetagnames = numtags;
1281                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1282                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1283                         tagsetsused = true;
1284                 }
1285         }
1286         if (tagsetsused)
1287         {
1288                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1289                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1290         }
1291         if (i)
1292                 loadmodel->numskins = i;
1293         return first;
1294 }
1295
1296 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1297 {
1298         skinfile_t *next;
1299         skinfileitem_t *skinfileitem, *nextitem;
1300         for (;skinfile;skinfile = next)
1301         {
1302                 next = skinfile->next;
1303                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1304                 {
1305                         nextitem = skinfileitem->next;
1306                         Mem_Free(skinfileitem);
1307                 }
1308                 Mem_Free(skinfile);
1309         }
1310 }
1311
1312 int Mod_CountSkinFiles(skinfile_t *skinfile)
1313 {
1314         int i;
1315         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1316         return i;
1317 }
1318
1319 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1320 {
1321         int i;
1322         double isnap = 1.0 / snap;
1323         for (i = 0;i < numvertices*numcomponents;i++)
1324                 vertices[i] = floor(vertices[i]*isnap)*snap;
1325 }
1326
1327 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1328 {
1329         int i, outtriangles;
1330         float d, edgedir[3], temp[3];
1331         // a degenerate triangle is one with no width (thickness, surface area)
1332         // these are characterized by having all 3 points colinear (along a line)
1333         // or having two points identical
1334         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1335         {
1336                 // calculate first edge
1337                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1338                 if (VectorLength2(edgedir) < 0.0001f)
1339                         continue; // degenerate first edge (no length)
1340                 VectorNormalize(edgedir);
1341                 // check if third point is on the edge (colinear)
1342                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1343                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1344                 if (VectorLength2(temp) < 0.0001f)
1345                         continue; // third point colinear with first edge
1346                 // valid triangle (no colinear points, no duplicate points)
1347                 VectorCopy(inelement3i, outelement3i);
1348                 outelement3i += 3;
1349                 outtriangles++;
1350         }
1351         return outtriangles;
1352 }
1353