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_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         for (i=0; i<4; i++)
 116         {
 117                 for (j=0; j<16; j++)
 118                 {
 119                         for (y=0; y<DISTORTRESOLUTION; y++)
 120                         {
 121                                 for (x=0; x<DISTORTRESOLUTION; x++)
 122                                 {
 123                                         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);
 124                                         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);
 125                                 }
 126                         }
 127                         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);
 128                 }
 129         }
 130
 131         return;
 132 }
 133
 134 texture_t r_surf_notexture;
 135
 136 void Mod_SetupNoTexture(void)
 137 {
 138         int x, y;
 139         qbyte pix[16][16][4];
 140
 141         // this makes a light grey/dark grey checkerboard texture
 142         for (y = 0;y < 16;y++)
 143         {
 144                 for (x = 0;x < 16;x++)
 145                 {
 146                         if ((y < 8) ^ (x < 8))
 147                         {
 148                                 pix[y][x][0] = 128;
 149                                 pix[y][x][1] = 128;
 150                                 pix[y][x][2] = 128;
 151                                 pix[y][x][3] = 255;
 152                         }
 153                         else
 154                         {
 155                                 pix[y][x][0] = 64;
 156                                 pix[y][x][1] = 64;
 157                                 pix[y][x][2] = 64;
 158                                 pix[y][x][3] = 255;
 159                         }
 160                 }
 161         }
 162
 163         r_notexture = R_LoadTexture2D(mod_shared_texturepool, "notexture", 16, 16, &pix[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP, NULL);
 164 }
 165
 166 static void mod_start(void)
 167 {
 168         int i;
 169         for (i = 0;i < MAX_MOD_KNOWN;i++)
 170                 if (mod_known[i].name[0])
 171                         Mod_UnloadModel(&mod_known[i]);
 172         Mod_LoadModels();
 173
 174         mod_shared_texturepool = R_AllocTexturePool();
 175         Mod_SetupNoTexture();
 176         Mod_BuildDetailTextures();
 177         Mod_BuildDistortTexture();
 178 }
 179
 180 static void mod_shutdown(void)
 181 {
 182         int i;
 183         for (i = 0;i < MAX_MOD_KNOWN;i++)
 184                 if (mod_known[i].name[0])
 185                         Mod_UnloadModel(&mod_known[i]);
 186
 187         R_FreeTexturePool(&mod_shared_texturepool);
 188 }
 189
 190 static void mod_newmap(void)
 191 {
 192 }
 193
 194 /*
 195 ===============
 196 Mod_Init
 197 ===============
 198 */
 199 static void Mod_Print (void);
 200 static void Mod_Precache (void);
 201 void Mod_Init (void)
 202 {
 203         Mod_BrushInit();
 204         Mod_AliasInit();
 205         Mod_SpriteInit();
 206
 207         Cvar_RegisterVariable(&r_mipskins);
 208         Cmd_AddCommand ("modellist", Mod_Print);
 209         Cmd_AddCommand ("modelprecache", Mod_Precache);
 210 }
 211
 212 void Mod_RenderInit(void)
 213 {
 214         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 215 }
 216
 217 void Mod_FreeModel (model_t *mod)
 218 {
 219         R_FreeTexturePool(&mod->texturepool);
 220         Mem_FreePool(&mod->mempool);
 221
 222         // clear the struct to make it available
 223         memset(mod, 0, sizeof(model_t));
 224 }
 225
 226 void Mod_UnloadModel (model_t *mod)
 227 {
 228         char name[MAX_QPATH];
 229         qboolean isworldmodel;
 230         strcpy(name, mod->name);
 231         isworldmodel = mod->isworldmodel;
 232         Mod_FreeModel(mod);
 233         strcpy(mod->name, name);
 234         mod->isworldmodel = isworldmodel;
 235         mod->needload = true;
 236 }
 237
 238 /*
 239 ==================
 240 Mod_LoadModel
 241
 242 Loads a model
 243 ==================
 244 */
 245 static model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 246 {
 247         int num;
 248         unsigned int crc;
 249         void *buf;
 250
 251         mod->used = true;
 252
 253         if (mod->name[0] == '*') // submodel
 254                 return mod;
 255
 256         crc = 0;
 257         buf = NULL;
 258         if (!mod->needload)
 259         {
 260                 if (checkdisk)
 261                 {
 262                         buf = FS_LoadFile (mod->name, false);
 263                         if (!buf)
 264                         {
 265                                 if (crash)
 266                                         Host_Error ("Mod_LoadModel: %s not found", mod->name); // LordHavoc: Sys_Error was *ANNOYING*
 267                                 return NULL;
 268                         }
 269
 270                         crc = CRC_Block(buf, fs_filesize);
 271                 }
 272                 else
 273                         crc = mod->crc;
 274
 275                 if (mod->crc == crc && mod->isworldmodel == isworldmodel)
 276                 {
 277                         if (buf)
 278                                 Mem_Free(buf);
 279                         return mod; // already loaded
 280                 }
 281         }
 282
 283         Con_DPrintf("loading model %s\n", mod->name);
 284
 285         if (!buf)
 286         {
 287                 buf = FS_LoadFile (mod->name, false);
 288                 if (!buf)
 289                 {
 290                         if (crash)
 291                                 Host_Error ("Mod_LoadModel: %s not found", mod->name);
 292                         return NULL;
 293                 }
 294                 crc = CRC_Block(buf, fs_filesize);
 295         }
 296
 297         // allocate a new model
 298         loadmodel = mod;
 299
 300         // LordHavoc: unload the existing model in this slot (if there is one)
 301         Mod_UnloadModel(mod);
 302         mod->isworldmodel = isworldmodel;
 303         mod->used = true;
 304         mod->crc = crc;
 305         // errors can prevent the corresponding mod->needload = false;
 306         mod->needload = true;
 307
 308         // all models use memory, so allocate a memory pool
 309         mod->mempool = Mem_AllocPool(mod->name);
 310         // all models load textures, so allocate a texture pool
 311         if (cls.state != ca_dedicated)
 312                 mod->texturepool = R_AllocTexturePool();
 313
 314         // call the apropriate loader
 315         num = LittleLong(*((int *)buf));
 316              if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf);
 317         else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf);
 318         else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf);
 319         else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf);
 320         else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf);
 321         else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf);
 322         else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf);
 323         else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf);
 324         else Host_Error("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 325
 326         Mem_Free(buf);
 327
 328         // no errors occurred
 329         mod->needload = false;
 330         return mod;
 331 }
 332
 333 void Mod_CheckLoaded(model_t *mod)
 334 {
 335         if (mod)
 336         {
 337                 if (mod->needload)
 338                         Mod_LoadModel(mod, true, true, mod->isworldmodel);
 339                 else
 340                 {
 341                         if (mod->type == mod_invalid)
 342                                 Host_Error("Mod_CheckLoaded: invalid model\n");
 343                         mod->used = true;
 344                         return;
 345                 }
 346         }
 347 }
 348
 349 /*
 350 ===================
 351 Mod_ClearAll
 352 ===================
 353 */
 354 void Mod_ClearAll(void)
 355 {
 356 }
 357
 358 void Mod_ClearUsed(void)
 359 {
 360         int i;
 361         model_t *mod;
 362
 363         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 364                 if (mod->name[0])
 365                         mod->used = false;
 366 }
 367
 368 void Mod_PurgeUnused(void)
 369 {
 370         int i;
 371         model_t *mod;
 372
 373         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 374                 if (mod->name[0])
 375                         if (!mod->used)
 376                                 Mod_FreeModel(mod);
 377 }
 378
 379 void Mod_LoadModels(void)
 380 {
 381         int i;
 382         model_t *mod;
 383
 384         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 385                 if (mod->name[0])
 386                         if (mod->used)
 387                                 Mod_CheckLoaded(mod);
 388 }
 389
 390 /*
 391 ==================
 392 Mod_FindName
 393
 394 ==================
 395 */
 396 model_t *Mod_FindName(const char *name)
 397 {
 398         int i;
 399         model_t *mod, *freemod;
 400
 401         if (!name[0])
 402                 Host_Error ("Mod_ForName: NULL name");
 403
 404 // search the currently loaded models
 405         freemod = NULL;
 406         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 407         {
 408                 if (mod->name[0])
 409                 {
 410                         if (!strcmp (mod->name, name))
 411                         {
 412                                 mod->used = true;
 413                                 return mod;
 414                         }
 415                 }
 416                 else if (freemod == NULL)
 417                         freemod = mod;
 418         }
 419
 420         if (freemod)
 421         {
 422                 mod = freemod;
 423                 strcpy (mod->name, name);
 424                 mod->needload = true;
 425                 mod->used = true;
 426                 return mod;
 427         }
 428
 429         Host_Error ("Mod_FindName: ran out of models\n");
 430         return NULL;
 431 }
 432
 433 /*
 434 ==================
 435 Mod_TouchModel
 436
 437 ==================
 438 */
 439 void Mod_TouchModel(const char *name)
 440 {
 441         model_t *mod;
 442
 443         mod = Mod_FindName(name);
 444         mod->used = true;
 445 }
 446
 447 /*
 448 ==================
 449 Mod_ForName
 450
 451 Loads in a model for the given name
 452 ==================
 453 */
 454 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 455 {
 456         return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
 457 }
 458
 459 qbyte *mod_base;
 460
 461
 462 //=============================================================================
 463
 464 /*
 465 ================
 466 Mod_Print
 467 ================
 468 */
 469 static void Mod_Print(void)
 470 {
 471         int             i;
 472         model_t *mod;
 473
 474         Con_Printf ("Loaded models:\n");
 475         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 476                 if (mod->name[0])
 477                         Con_Printf ("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 478 }
 479
 480 /*
 481 ================
 482 Mod_Precache
 483 ================
 484 */
 485 static void Mod_Precache(void)
 486 {
 487         if (Cmd_Argc() == 2)
 488                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 489         else
 490                 Con_Printf("usage: modelprecache <filename>\n");
 491 }
 492
 493 #if 1
 494 // fast way, using an edge hash
 495 #define TRIANGLEEDGEHASH 1024
 496 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 497 {
 498         int i, j, p, e1, e2, *n, hashindex, count, match;
 499         const int *e;
 500         typedef struct edgehashentry_s
 501         {
 502                 struct edgehashentry_s *next;
 503                 int triangle;
 504                 int element[2];
 505         }
 506         edgehashentry_t;
 507         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 508         memset(edgehash, 0, sizeof(edgehash));
 509         edgehashentries = edgehashentriesbuffer;
 510         // if there are too many triangles for the stack array, allocate larger buffer
 511         if (numtriangles > TRIANGLEEDGEHASH)
 512                 edgehashentries = Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 513         // find neighboring triangles
 514         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 515         {
 516                 for (j = 0, p = 2;j < 3;p = j, j++)
 517                 {
 518                         e1 = e[p];
 519                         e2 = e[j];
 520                         // this hash index works for both forward and backward edges
 521                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 522                         hash = edgehashentries + i * 3 + j;
 523                         hash->next = edgehash[hashindex];
 524                         edgehash[hashindex] = hash;
 525                         hash->triangle = i;
 526                         hash->element[0] = e1;
 527                         hash->element[1] = e2;
 528                 }
 529         }
 530         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 531         {
 532                 for (j = 0, p = 2;j < 3;p = j, j++)
 533                 {
 534                         e1 = e[p];
 535                         e2 = e[j];
 536                         // this hash index works for both forward and backward edges
 537                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 538                         count = 0;
 539                         match = -1;
 540                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 541                         {
 542                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 543                                 {
 544                                         if (hash->triangle != i)
 545                                                 match = hash->triangle;
 546                                         count++;
 547                                 }
 548                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 549                                         count++;
 550                         }
 551                         // detect edges shared by three triangles and make them seams
 552                         if (count > 2)
 553                                 match = -1;
 554                         n[p] = match;
 555                 }
 556         }
 557         // free the allocated buffer
 558         if (edgehashentries != edgehashentriesbuffer)
 559                 Mem_Free(edgehashentries);
 560 }
 561 #else
 562 // very slow but simple way
 563 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 564 {
 565         int i, match, count;
 566         count = 0;
 567         match = -1;
 568         for (i = 0;i < numtriangles;i++, elements += 3)
 569         {
 570                      if ((elements[0] == start && elements[1] == end)
 571                       || (elements[1] == start && elements[2] == end)
 572                       || (elements[2] == start && elements[0] == end))
 573                 {
 574                         if (i != ignore)
 575                                 match = i;
 576                         count++;
 577                 }
 578                 else if ((elements[1] == start && elements[0] == end)
 579                       || (elements[2] == start && elements[1] == end)
 580                       || (elements[0] == start && elements[2] == end))
 581                         count++;
 582         }
 583         // detect edges shared by three triangles and make them seams
 584         if (count > 2)
 585                 match = -1;
 586         return match;
 587 }
 588
 589 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 590 {
 591         int i, *n;
 592         const int *e;
 593         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 594         {
 595                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 596                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 597                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 598         }
 599 }
 600 #endif
 601
 602 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 603 {
 604         int i;
 605         for (i = 0;i < numtriangles * 3;i++)
 606                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 607                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 608 }
 609
 610 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)
 611 {
 612         float f;
 613         normal3f[0] = (v1[1] - v0[1]) * (v2[2] - v0[2]) - (v1[2] - v0[2]) * (v2[1] - v0[1]);
 614         normal3f[1] = (v1[2] - v0[2]) * (v2[0] - v0[0]) - (v1[0] - v0[0]) * (v2[2] - v0[2]);
 615         normal3f[2] = (v1[0] - v0[0]) * (v2[1] - v0[1]) - (v1[1] - v0[1]) * (v2[0] - v0[0]);
 616         VectorNormalize(normal3f);
 617         tvector3f[0] = ((tc1[0] - tc0[0]) * (v2[0] - v0[0]) - (tc2[0] - tc0[0]) * (v1[0] - v0[0]));
 618         tvector3f[1] = ((tc1[0] - tc0[0]) * (v2[1] - v0[1]) - (tc2[0] - tc0[0]) * (v1[1] - v0[1]));
 619         tvector3f[2] = ((tc1[0] - tc0[0]) * (v2[2] - v0[2]) - (tc2[0] - tc0[0]) * (v1[2] - v0[2]));
 620         f = -DotProduct(tvector3f, normal3f);
 621         VectorMA(tvector3f, f, normal3f, tvector3f);
 622         VectorNormalize(tvector3f);
 623         CrossProduct(normal3f, tvector3f, svector3f);
 624 }
 625
 626 // warning: this is an expensive function!
 627 void Mod_BuildTextureVectorsAndNormals(int numverts, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f)
 628 {
 629         int i, tnum;
 630         float sdir[3], tdir[3], normal[3], *v;
 631         const int *e;
 632         // clear the vectors
 633         if (svector3f)
 634                 memset(svector3f, 0, numverts * sizeof(float[3]));
 635         if (tvector3f)
 636                 memset(tvector3f, 0, numverts * sizeof(float[3]));
 637         if (normal3f)
 638                 memset(normal3f, 0, numverts * sizeof(float[3]));
 639         // process each vertex of each triangle and accumulate the results
 640         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 641         {
 642                 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);
 643                 if (svector3f)
 644                 {
 645                         for (i = 0;i < 3;i++)
 646                         {
 647                                 svector3f[e[i]*3  ] += sdir[0];
 648                                 svector3f[e[i]*3+1] += sdir[1];
 649                                 svector3f[e[i]*3+2] += sdir[2];
 650                         }
 651                 }
 652                 if (tvector3f)
 653                 {
 654                         for (i = 0;i < 3;i++)
 655                         {
 656                                 tvector3f[e[i]*3  ] += tdir[0];
 657                                 tvector3f[e[i]*3+1] += tdir[1];
 658                                 tvector3f[e[i]*3+2] += tdir[2];
 659                         }
 660                 }
 661                 if (normal3f)
 662                 {
 663                         for (i = 0;i < 3;i++)
 664                         {
 665                                 normal3f[e[i]*3  ] += normal[0];
 666                                 normal3f[e[i]*3+1] += normal[1];
 667                                 normal3f[e[i]*3+2] += normal[2];
 668                         }
 669                 }
 670         }
 671         // now we could divide the vectors by the number of averaged values on
 672         // each vertex...  but instead normalize them
 673         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 674         if (svector3f)
 675                 for (i = 0, v = svector3f;i < numverts;i++, v += 3)
 676                         VectorNormalize(v);
 677         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 678         if (tvector3f)
 679                 for (i = 0, v = tvector3f;i < numverts;i++, v += 3)
 680                         VectorNormalize(v);
 681         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 682         if (normal3f)
 683                 for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 684                         VectorNormalize(v);
 685 }
 686
 687 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)
 688 {
 689         shadowmesh_t *newmesh;
 690         qbyte *data;
 691         int size;
 692         size = sizeof(shadowmesh_t);
 693         size += maxverts * sizeof(float[3]);
 694         if (light)
 695                 size += maxverts * sizeof(float[11]);
 696         size += maxtriangles * sizeof(int[3]);
 697         if (neighbors)
 698                 size += maxtriangles * sizeof(int[3]);
 699         if (expandable)
 700                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 701         data = Mem_Alloc(mempool, size);
 702         newmesh = (void *)data;data += sizeof(*newmesh);
 703         newmesh->map_diffuse = map_diffuse;
 704         newmesh->map_specular = map_specular;
 705         newmesh->map_normal = map_normal;
 706         newmesh->maxverts = maxverts;
 707         newmesh->maxtriangles = maxtriangles;
 708         newmesh->numverts = 0;
 709         newmesh->numtriangles = 0;
 710
 711         newmesh->vertex3f = (void *)data;data += maxverts * sizeof(float[3]);
 712         if (light)
 713         {
 714                 newmesh->svector3f = (void *)data;data += maxverts * sizeof(float[3]);
 715                 newmesh->tvector3f = (void *)data;data += maxverts * sizeof(float[3]);
 716                 newmesh->normal3f = (void *)data;data += maxverts * sizeof(float[3]);
 717                 newmesh->texcoord2f = (void *)data;data += maxverts * sizeof(float[2]);
 718         }
 719         newmesh->element3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 720         if (neighbors)
 721         {
 722                 newmesh->neighbor3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 723         }
 724         if (expandable)
 725         {
 726                 newmesh->vertexhashtable = (void *)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 727                 newmesh->vertexhashentries = (void *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 728         }
 729         return newmesh;
 730 }
 731
 732 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 733 {
 734         shadowmesh_t *newmesh;
 735         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 736         newmesh->numverts = oldmesh->numverts;
 737         newmesh->numtriangles = oldmesh->numtriangles;
 738
 739         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 740         if (newmesh->svector3f && oldmesh->svector3f)
 741         {
 742                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 743                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 744                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 745                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 746         }
 747         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 748         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 749                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 750         return newmesh;
 751 }
 752
 753 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 754 {
 755         int hashindex, vnum;
 756         shadowmeshvertexhash_t *hash;
 757         // this uses prime numbers intentionally
 758         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 759         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 760         {
 761                 vnum = (hash - mesh->vertexhashentries);
 762                 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]))
 763                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 764                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 765                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 766                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 767                         return hash - mesh->vertexhashentries;
 768         }
 769         vnum = mesh->numverts++;
 770         hash = mesh->vertexhashentries + vnum;
 771         hash->next = mesh->vertexhashtable[hashindex];
 772         mesh->vertexhashtable[hashindex] = hash;
 773         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 774         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 775         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 776         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 777         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 778         return vnum;
 779 }
 780
 781 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 782 {
 783         if (mesh->numtriangles == 0)
 784         {
 785                 // set the properties on this empty mesh to be more favorable...
 786                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 787                 mesh->map_diffuse = map_diffuse;
 788                 mesh->map_specular = map_specular;
 789                 mesh->map_normal = map_normal;
 790         }
 791         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)
 792         {
 793                 if (mesh->next == NULL)
 794                         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);
 795                 mesh = mesh->next;
 796         }
 797         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 798         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 799         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 800         mesh->numtriangles++;
 801 }
 802
 803 void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, int numtris, int *element3i)
 804 {
 805         int i, j, e;
 806         float vbuf[3*14], *v;
 807         memset(vbuf, 0, sizeof(vbuf));
 808         for (i = 0;i < numtris;i++)
 809         {
 810                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 811                 {
 812                         e = *element3i++;
 813                         if (vertex3f)
 814                         {
 815                                 v[0] = vertex3f[e * 3 + 0];
 816                                 v[1] = vertex3f[e * 3 + 1];
 817                                 v[2] = vertex3f[e * 3 + 2];
 818                         }
 819                         if (svector3f)
 820                         {
 821                                 v[3] = svector3f[e * 3 + 0];
 822                                 v[4] = svector3f[e * 3 + 1];
 823                                 v[5] = svector3f[e * 3 + 2];
 824                         }
 825                         if (tvector3f)
 826                         {
 827                                 v[6] = tvector3f[e * 3 + 0];
 828                                 v[7] = tvector3f[e * 3 + 1];
 829                                 v[8] = tvector3f[e * 3 + 2];
 830                         }
 831                         if (normal3f)
 832                         {
 833                                 v[9] = normal3f[e * 3 + 0];
 834                                 v[10] = normal3f[e * 3 + 1];
 835                                 v[11] = normal3f[e * 3 + 2];
 836                         }
 837                         if (texcoord2f)
 838                         {
 839                                 v[12] = texcoord2f[e * 2 + 0];
 840                                 v[13] = texcoord2f[e * 2 + 1];
 841                         }
 842                 }
 843                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 844         }
 845 }
 846
 847 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)
 848 {
 849         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 850 }
 851
 852 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 853 {
 854         shadowmesh_t *mesh, *newmesh, *nextmesh;
 855         // reallocate meshs to conserve space
 856         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 857         {
 858                 nextmesh = mesh->next;
 859                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 860                 {
 861                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 862                         newmesh->next = firstmesh;
 863                         firstmesh = newmesh;
 864                 }
 865                 Mem_Free(mesh);
 866         }
 867         return firstmesh;
 868 }
 869
 870 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 871 {
 872         int i;
 873         shadowmesh_t *mesh;
 874         vec3_t nmins, nmaxs, ncenter, temp;
 875         float nradius2, dist2, *v;
 876         // calculate bbox
 877         for (mesh = firstmesh;mesh;mesh = mesh->next)
 878         {
 879                 if (mesh == firstmesh)
 880                 {
 881                         VectorCopy(mesh->vertex3f, nmins);
 882                         VectorCopy(mesh->vertex3f, nmaxs);
 883                 }
 884                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 885                 {
 886                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 887                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 888                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 889                 }
 890         }
 891         // calculate center and radius
 892         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 893         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 894         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 895         nradius2 = 0;
 896         for (mesh = firstmesh;mesh;mesh = mesh->next)
 897         {
 898                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 899                 {
 900                         VectorSubtract(v, ncenter, temp);
 901                         dist2 = DotProduct(temp, temp);
 902                         if (nradius2 < dist2)
 903                                 nradius2 = dist2;
 904                 }
 905         }
 906         // return data
 907         if (mins)
 908                 VectorCopy(nmins, mins);
 909         if (maxs)
 910                 VectorCopy(nmaxs, maxs);
 911         if (center)
 912                 VectorCopy(ncenter, center);
 913         if (radius)
 914                 *radius = sqrt(nradius2);
 915 }
 916
 917 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 918 {
 919         shadowmesh_t *nextmesh;
 920         for (;mesh;mesh = nextmesh)
 921         {
 922                 nextmesh = mesh->next;
 923                 Mem_Free(mesh);
 924         }
 925 }
 926
 927 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 928 {
 929         int i;
 930         for (i = 0;i < width*height;i++)
 931                 if (((qbyte *)&palette[in[i]])[3] > 0)
 932                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 933         return NULL;
 934 }
 935
 936 static int detailtexturecycle = 0;
 937 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
 938 {
 939         imageskin_t s;
 940         memset(skinframe, 0, sizeof(*skinframe));
 941         if (!image_loadskin(&s, basename))
 942                 return false;
 943         if (usedetailtexture)
 944                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 945         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 946         if (s.nmappixels != NULL)
 947                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 948         if (s.glosspixels != NULL)
 949                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 950         if (s.glowpixels != NULL && loadglowtexture)
 951                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 952         if (s.maskpixels != NULL)
 953                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 954         if (loadpantsandshirt)
 955         {
 956                 if (s.pantspixels != NULL)
 957                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 958                 if (s.shirtpixels != NULL)
 959                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 960         }
 961         image_freeskin(&s);
 962         return true;
 963 }
 964
 965 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
 966 {
 967         qbyte *temp1, *temp2;
 968         memset(skinframe, 0, sizeof(*skinframe));
 969         if (!skindata)
 970                 return false;
 971         if (usedetailtexture)
 972                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 973         if (r_shadow_bumpscale_basetexture.value > 0)
 974         {
 975                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
 976                 temp2 = temp1 + width * height * 4;
 977                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
 978                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
 979                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
 980                 Mem_Free(temp1);
 981         }
 982         if (loadglowtexture)
 983         {
 984                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
 985                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
 986                 if (loadpantsandshirt)
 987                 {
 988                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 989                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 990                         if (skinframe->pants || skinframe->shirt)
 991                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormapnofullbrights, textureflags); // no special colors
 992                 }
 993         }
 994         else
 995         {
 996                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
 997                 if (loadpantsandshirt)
 998                 {
 999                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1000                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1001                         if (skinframe->pants || skinframe->shirt)
1002                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
1003                 }
1004         }
1005         return true;
1006 }
1007
1008 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1009 {
1010         float v[3], tc[3];
1011         v[0] = ix;
1012         v[1] = iy;
1013         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1014                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1015         else
1016                 v[2] = 0;
1017         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1018         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1019         texcoord2f[0] = tc[0];
1020         texcoord2f[1] = tc[1];
1021 }
1022
1023 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)
1024 {
1025         float vup[3], vdown[3], vleft[3], vright[3];
1026         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1027         float sv[3], tv[3], nl[3];
1028         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1029         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1030         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1031         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1032         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1033         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1034         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1035         VectorAdd(svector3f, sv, svector3f);
1036         VectorAdd(tvector3f, tv, tvector3f);
1037         VectorAdd(normal3f, nl, normal3f);
1038         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1039         VectorAdd(svector3f, sv, svector3f);
1040         VectorAdd(tvector3f, tv, tvector3f);
1041         VectorAdd(normal3f, nl, normal3f);
1042         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1043         VectorAdd(svector3f, sv, svector3f);
1044         VectorAdd(tvector3f, tv, tvector3f);
1045         VectorAdd(normal3f, nl, normal3f);
1046 }
1047
1048 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)
1049 {
1050         int x, y, ix, iy, *e;
1051         e = element3i;
1052         for (y = 0;y < height;y++)
1053         {
1054                 for (x = 0;x < width;x++)
1055                 {
1056                         e[0] = (y + 1) * (width + 1) + (x + 0);
1057                         e[1] = (y + 0) * (width + 1) + (x + 0);
1058                         e[2] = (y + 1) * (width + 1) + (x + 1);
1059                         e[3] = (y + 0) * (width + 1) + (x + 0);
1060                         e[4] = (y + 0) * (width + 1) + (x + 1);
1061                         e[5] = (y + 1) * (width + 1) + (x + 1);
1062                         e += 6;
1063                 }
1064         }
1065         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1066         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1067                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1068                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1069 }
1070
1071 skinfile_t *Mod_LoadSkinFiles(void)
1072 {
1073         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1074         char *text;
1075         const char *data;
1076         skinfile_t *skinfile, *first = NULL;
1077         skinfileitem_t *skinfileitem;
1078         char word[10][MAX_QPATH];
1079         overridetagnameset_t tagsets[MAX_SKINS];
1080         overridetagname_t tags[256];
1081
1082 /*
1083 sample file:
1084 U_bodyBox,models/players/Legoman/BikerA2.tga
1085 U_RArm,models/players/Legoman/BikerA1.tga
1086 U_LArm,models/players/Legoman/BikerA1.tga
1087 U_armor,common/nodraw
1088 U_sword,common/nodraw
1089 U_shield,common/nodraw
1090 U_homb,common/nodraw
1091 U_backpack,common/nodraw
1092 U_colcha,common/nodraw
1093 tag_head,
1094 tag_weapon,
1095 tag_torso,
1096 */
1097         memset(tagsets, 0, sizeof(tagsets));
1098         memset(word, 0, sizeof(word));
1099         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), true));i++)
1100         {
1101                 numtags = 0;
1102                 skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1103                 skinfile->next = first;
1104                 first = skinfile;
1105                 for(line = 0;;line++)
1106                 {
1107                         // parse line
1108                         if (!COM_ParseToken(&data, true))
1109                                 break;
1110                         if (!strcmp(com_token, "\n"))
1111                                 continue;
1112                         words = 0;
1113                         wordsoverflow = false;
1114                         do
1115                         {
1116                                 if (words < 10)
1117                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1118                                 else
1119                                         wordsoverflow = true;
1120                         }
1121                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1122                         if (wordsoverflow)
1123                         {
1124                                 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);
1125                                 continue;
1126                         }
1127                         // words is always >= 1
1128                         if (!strcmp(word[0], "replace"))
1129                         {
1130                                 if (words == 3)
1131                                 {
1132                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1133                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1134                                         skinfileitem->next = skinfile->items;
1135                                         skinfile->items = skinfileitem;
1136                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1137                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1138                                 }
1139                                 else
1140                                         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]);
1141                         }
1142                         else if (words == 2 && !strcmp(word[1], ","))
1143                         {
1144                                 // tag name, like "tag_weapon,"
1145                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1146                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1147                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1148                                 numtags++;
1149                         }
1150                         else if (words == 3 && !strcmp(word[1], ","))
1151                         {
1152                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1153                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1154                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1155                                 skinfileitem->next = skinfile->items;
1156                                 skinfile->items = skinfileitem;
1157                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1158                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1159                         }
1160                         else
1161                                 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);
1162                 }
1163                 Mem_Free(text);
1164
1165                 if (numtags)
1166                 {
1167                         overridetagnameset_t *t;
1168                         t = tagsets + i;
1169                         t->num_overridetagnames = numtags;
1170                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1171                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1172                         tagsetsused = true;
1173                 }
1174         }
1175         if (tagsetsused)
1176         {
1177                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1178                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1179         }
1180         if (i)
1181                 loadmodel->numskins = i;
1182         return first;
1183 }
1184
1185 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1186 {
1187         skinfile_t *next;
1188         skinfileitem_t *skinfileitem, *nextitem;
1189         for (;skinfile;skinfile = next)
1190         {
1191                 next = skinfile->next;
1192                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1193                 {
1194                         nextitem = skinfileitem->next;
1195                         Mem_Free(skinfileitem);
1196                 }
1197                 Mem_Free(skinfile);
1198         }
1199 }
1200
1201 int Mod_CountSkinFiles(skinfile_t *skinfile)
1202 {
1203         int i;
1204         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1205         return i;
1206 }
1207
1208 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1209 {
1210         int i, outtriangles;
1211         float d, edgedir[3], temp[3];
1212         // a degenerate triangle is one with no width (thickness, surface area)
1213         // these are characterized by having all 3 points colinear (along a line)
1214         // or having two points identical
1215         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1216         {
1217                 // calculate first edge
1218                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1219                 if (VectorLength2(edgedir) < 0.0001f)
1220                         continue; // degenerate first edge (no length)
1221                 VectorNormalize(edgedir);
1222                 // check if third point is on the edge (colinear)
1223                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1224                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1225                 if (VectorLength2(temp) < 0.0001f)
1226                         continue; // third point colinear with first edge
1227                 // valid triangle (no colinear points, no duplicate points)
1228                 VectorCopy(inelement3i, outelement3i);
1229                 outelement3i += 3;
1230                 outtriangles++;
1231         }
1232         return outtriangles;
1233 }
1234