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
 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 texture_t r_surf_notexture;
 140
 141 void Mod_SetupNoTexture(void)
 142 {
 143         int x, y;
 144         qbyte pix[16][16][4];
 145
 146         // this makes a light grey/dark grey checkerboard texture
 147         for (y = 0;y < 16;y++)
 148         {
 149                 for (x = 0;x < 16;x++)
 150                 {
 151                         if ((y < 8) ^ (x < 8))
 152                         {
 153                                 pix[y][x][0] = 128;
 154                                 pix[y][x][1] = 128;
 155                                 pix[y][x][2] = 128;
 156                                 pix[y][x][3] = 255;
 157                         }
 158                         else
 159                         {
 160                                 pix[y][x][0] = 64;
 161                                 pix[y][x][1] = 64;
 162                                 pix[y][x][2] = 64;
 163                                 pix[y][x][3] = 255;
 164                         }
 165                 }
 166         }
 167
 168         r_notexture = R_LoadTexture2D(mod_shared_texturepool, "notexture", 16, 16, &pix[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP, NULL);
 169 }
 170
 171 static void mod_start(void)
 172 {
 173         int i;
 174         for (i = 0;i < MAX_MOD_KNOWN;i++)
 175                 if (mod_known[i].name[0])
 176                         Mod_UnloadModel(&mod_known[i]);
 177         Mod_LoadModels();
 178
 179         mod_shared_texturepool = R_AllocTexturePool();
 180         Mod_SetupNoTexture();
 181         Mod_BuildDetailTextures();
 182         Mod_BuildDistortTexture();
 183 }
 184
 185 static void mod_shutdown(void)
 186 {
 187         int i;
 188         for (i = 0;i < MAX_MOD_KNOWN;i++)
 189                 if (mod_known[i].name[0])
 190                         Mod_UnloadModel(&mod_known[i]);
 191
 192         R_FreeTexturePool(&mod_shared_texturepool);
 193 }
 194
 195 static void mod_newmap(void)
 196 {
 197 }
 198
 199 /*
 200 ===============
 201 Mod_Init
 202 ===============
 203 */
 204 static void Mod_Print(void);
 205 static void Mod_Precache (void);
 206 void Mod_Init (void)
 207 {
 208         Mod_BrushInit();
 209         Mod_AliasInit();
 210         Mod_SpriteInit();
 211
 212         Cvar_RegisterVariable(&r_mipskins);
 213         Cmd_AddCommand ("modellist", Mod_Print);
 214         Cmd_AddCommand ("modelprecache", Mod_Precache);
 215 }
 216
 217 void Mod_RenderInit(void)
 218 {
 219         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 220 }
 221
 222 void Mod_FreeModel (model_t *mod)
 223 {
 224         R_FreeTexturePool(&mod->texturepool);
 225         Mem_FreePool(&mod->mempool);
 226
 227         // clear the struct to make it available
 228         memset(mod, 0, sizeof(model_t));
 229 }
 230
 231 void Mod_UnloadModel (model_t *mod)
 232 {
 233         char name[MAX_QPATH];
 234         qboolean isworldmodel;
 235         strcpy(name, mod->name);
 236         isworldmodel = mod->isworldmodel;
 237         Mod_FreeModel(mod);
 238         strcpy(mod->name, name);
 239         mod->isworldmodel = isworldmodel;
 240         mod->needload = true;
 241 }
 242
 243 /*
 244 ==================
 245 Mod_LoadModel
 246
 247 Loads a model
 248 ==================
 249 */
 250 static model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 251 {
 252         int num;
 253         unsigned int crc;
 254         void *buf;
 255
 256         mod->used = true;
 257
 258         if (mod->name[0] == '*') // submodel
 259                 return mod;
 260
 261         crc = 0;
 262         buf = NULL;
 263         if (!mod->needload)
 264         {
 265                 if (checkdisk)
 266                 {
 267                         buf = FS_LoadFile (mod->name, false);
 268                         if (!buf)
 269                         {
 270                                 if (crash)
 271                                         Host_Error ("Mod_LoadModel: %s not found", mod->name); // LordHavoc: Sys_Error was *ANNOYING*
 272                                 return NULL;
 273                         }
 274
 275                         crc = CRC_Block(buf, fs_filesize);
 276                 }
 277                 else
 278                         crc = mod->crc;
 279
 280                 if (mod->crc == crc && mod->isworldmodel == isworldmodel)
 281                 {
 282                         if (buf)
 283                                 Mem_Free(buf);
 284                         return mod; // already loaded
 285                 }
 286         }
 287
 288         Con_DPrintf("loading model %s\n", mod->name);
 289
 290         if (!buf)
 291         {
 292                 buf = FS_LoadFile (mod->name, false);
 293                 if (!buf)
 294                 {
 295                         if (crash)
 296                                 Host_Error ("Mod_LoadModel: %s not found", mod->name);
 297                         return NULL;
 298                 }
 299                 crc = CRC_Block(buf, fs_filesize);
 300         }
 301
 302         // allocate a new model
 303         loadmodel = mod;
 304
 305         // LordHavoc: unload the existing model in this slot (if there is one)
 306         Mod_UnloadModel(mod);
 307         mod->isworldmodel = isworldmodel;
 308         mod->used = true;
 309         mod->crc = crc;
 310         // errors can prevent the corresponding mod->needload = false;
 311         mod->needload = true;
 312
 313         // all models use memory, so allocate a memory pool
 314         mod->mempool = Mem_AllocPool(mod->name);
 315         // all models load textures, so allocate a texture pool
 316         if (cls.state != ca_dedicated)
 317                 mod->texturepool = R_AllocTexturePool();
 318
 319         // call the apropriate loader
 320         num = LittleLong(*((int *)buf));
 321              if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf);
 322         else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf);
 323         else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf);
 324         else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf);
 325         else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf);
 326         else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf);
 327         else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf);
 328         else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf);
 329         else Host_Error("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 330
 331         Mem_Free(buf);
 332
 333         // no errors occurred
 334         mod->needload = false;
 335         return mod;
 336 }
 337
 338 void Mod_CheckLoaded(model_t *mod)
 339 {
 340         if (mod)
 341         {
 342                 if (mod->needload)
 343                         Mod_LoadModel(mod, true, true, mod->isworldmodel);
 344                 else
 345                 {
 346                         if (mod->type == mod_invalid)
 347                                 Host_Error("Mod_CheckLoaded: invalid model\n");
 348                         mod->used = true;
 349                         return;
 350                 }
 351         }
 352 }
 353
 354 /*
 355 ===================
 356 Mod_ClearAll
 357 ===================
 358 */
 359 void Mod_ClearAll(void)
 360 {
 361 }
 362
 363 void Mod_ClearUsed(void)
 364 {
 365         int i;
 366         model_t *mod;
 367
 368         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 369                 if (mod->name[0])
 370                         mod->used = false;
 371 }
 372
 373 void Mod_PurgeUnused(void)
 374 {
 375         int i;
 376         model_t *mod;
 377
 378         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 379                 if (mod->name[0])
 380                         if (!mod->used)
 381                                 Mod_FreeModel(mod);
 382 }
 383
 384 void Mod_LoadModels(void)
 385 {
 386         int i;
 387         model_t *mod;
 388
 389         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 390                 if (mod->name[0])
 391                         if (mod->used)
 392                                 Mod_CheckLoaded(mod);
 393 }
 394
 395 /*
 396 ==================
 397 Mod_FindName
 398
 399 ==================
 400 */
 401 model_t *Mod_FindName(const char *name)
 402 {
 403         int i;
 404         model_t *mod, *freemod;
 405
 406         if (!name[0])
 407                 Host_Error ("Mod_ForName: NULL name");
 408
 409 // search the currently loaded models
 410         freemod = NULL;
 411         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 412         {
 413                 if (mod->name[0])
 414                 {
 415                         if (!strcmp (mod->name, name))
 416                         {
 417                                 mod->used = true;
 418                                 return mod;
 419                         }
 420                 }
 421                 else if (freemod == NULL)
 422                         freemod = mod;
 423         }
 424
 425         if (freemod)
 426         {
 427                 mod = freemod;
 428                 strcpy (mod->name, name);
 429                 mod->needload = true;
 430                 mod->used = true;
 431                 return mod;
 432         }
 433
 434         Host_Error ("Mod_FindName: ran out of models\n");
 435         return NULL;
 436 }
 437
 438 /*
 439 ==================
 440 Mod_TouchModel
 441
 442 ==================
 443 */
 444 void Mod_TouchModel(const char *name)
 445 {
 446         model_t *mod;
 447
 448         mod = Mod_FindName(name);
 449         mod->used = true;
 450 }
 451
 452 /*
 453 ==================
 454 Mod_ForName
 455
 456 Loads in a model for the given name
 457 ==================
 458 */
 459 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 460 {
 461         return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
 462 }
 463
 464 qbyte *mod_base;
 465
 466
 467 //=============================================================================
 468
 469 /*
 470 ================
 471 Mod_Print
 472 ================
 473 */
 474 static void Mod_Print(void)
 475 {
 476         int             i;
 477         model_t *mod;
 478
 479         Con_Print("Loaded models:\n");
 480         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 481                 if (mod->name[0])
 482                         Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 483 }
 484
 485 /*
 486 ================
 487 Mod_Precache
 488 ================
 489 */
 490 static void Mod_Precache(void)
 491 {
 492         if (Cmd_Argc() == 2)
 493                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 494         else
 495                 Con_Print("usage: modelprecache <filename>\n");
 496 }
 497
 498 #if 1
 499 // fast way, using an edge hash
 500 #define TRIANGLEEDGEHASH 1024
 501 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 502 {
 503         int i, j, p, e1, e2, *n, hashindex, count, match;
 504         const int *e;
 505         typedef struct edgehashentry_s
 506         {
 507                 struct edgehashentry_s *next;
 508                 int triangle;
 509                 int element[2];
 510         }
 511         edgehashentry_t;
 512         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 513         memset(edgehash, 0, sizeof(edgehash));
 514         edgehashentries = edgehashentriesbuffer;
 515         // if there are too many triangles for the stack array, allocate larger buffer
 516         if (numtriangles > TRIANGLEEDGEHASH)
 517                 edgehashentries = Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 518         // find neighboring triangles
 519         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 520         {
 521                 for (j = 0, p = 2;j < 3;p = j, j++)
 522                 {
 523                         e1 = e[p];
 524                         e2 = e[j];
 525                         // this hash index works for both forward and backward edges
 526                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 527                         hash = edgehashentries + i * 3 + j;
 528                         hash->next = edgehash[hashindex];
 529                         edgehash[hashindex] = hash;
 530                         hash->triangle = i;
 531                         hash->element[0] = e1;
 532                         hash->element[1] = e2;
 533                 }
 534         }
 535         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 536         {
 537                 for (j = 0, p = 2;j < 3;p = j, j++)
 538                 {
 539                         e1 = e[p];
 540                         e2 = e[j];
 541                         // this hash index works for both forward and backward edges
 542                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 543                         count = 0;
 544                         match = -1;
 545                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 546                         {
 547                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 548                                 {
 549                                         if (hash->triangle != i)
 550                                                 match = hash->triangle;
 551                                         count++;
 552                                 }
 553                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 554                                         count++;
 555                         }
 556                         // detect edges shared by three triangles and make them seams
 557                         if (count > 2)
 558                                 match = -1;
 559                         n[p] = match;
 560                 }
 561         }
 562         // free the allocated buffer
 563         if (edgehashentries != edgehashentriesbuffer)
 564                 Mem_Free(edgehashentries);
 565 }
 566 #else
 567 // very slow but simple way
 568 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 569 {
 570         int i, match, count;
 571         count = 0;
 572         match = -1;
 573         for (i = 0;i < numtriangles;i++, elements += 3)
 574         {
 575                      if ((elements[0] == start && elements[1] == end)
 576                       || (elements[1] == start && elements[2] == end)
 577                       || (elements[2] == start && elements[0] == end))
 578                 {
 579                         if (i != ignore)
 580                                 match = i;
 581                         count++;
 582                 }
 583                 else if ((elements[1] == start && elements[0] == end)
 584                       || (elements[2] == start && elements[1] == end)
 585                       || (elements[0] == start && elements[2] == end))
 586                         count++;
 587         }
 588         // detect edges shared by three triangles and make them seams
 589         if (count > 2)
 590                 match = -1;
 591         return match;
 592 }
 593
 594 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 595 {
 596         int i, *n;
 597         const int *e;
 598         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 599         {
 600                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 601                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 602                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 603         }
 604 }
 605 #endif
 606
 607 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 608 {
 609         int i;
 610         for (i = 0;i < numtriangles * 3;i++)
 611                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 612                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 613 }
 614
 615 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)
 616 {
 617         float f;
 618         normal3f[0] = (v1[1] - v0[1]) * (v2[2] - v0[2]) - (v1[2] - v0[2]) * (v2[1] - v0[1]);
 619         normal3f[1] = (v1[2] - v0[2]) * (v2[0] - v0[0]) - (v1[0] - v0[0]) * (v2[2] - v0[2]);
 620         normal3f[2] = (v1[0] - v0[0]) * (v2[1] - v0[1]) - (v1[1] - v0[1]) * (v2[0] - v0[0]);
 621         VectorNormalize(normal3f);
 622         tvector3f[0] = ((tc1[0] - tc0[0]) * (v2[0] - v0[0]) - (tc2[0] - tc0[0]) * (v1[0] - v0[0]));
 623         tvector3f[1] = ((tc1[0] - tc0[0]) * (v2[1] - v0[1]) - (tc2[0] - tc0[0]) * (v1[1] - v0[1]));
 624         tvector3f[2] = ((tc1[0] - tc0[0]) * (v2[2] - v0[2]) - (tc2[0] - tc0[0]) * (v1[2] - v0[2]));
 625         f = -DotProduct(tvector3f, normal3f);
 626         VectorMA(tvector3f, f, normal3f, tvector3f);
 627         VectorNormalize(tvector3f);
 628         // note: can't be a CrossProduct as that sometimes flips the texture
 629         svector3f[0] = ((tc1[1] - tc0[1]) * (v2[0] - v0[0]) - (tc2[1] - tc0[1]) * (v1[0] - v0[0]));
 630         svector3f[1] = ((tc1[1] - tc0[1]) * (v2[1] - v0[1]) - (tc2[1] - tc0[1]) * (v1[1] - v0[1]));
 631         svector3f[2] = ((tc1[1] - tc0[1]) * (v2[2] - v0[2]) - (tc2[1] - tc0[1]) * (v1[2] - v0[2]));
 632         f = -DotProduct(svector3f, normal3f);
 633         VectorMA(svector3f, f, normal3f, svector3f);
 634         VectorNormalize(svector3f);
 635 }
 636
 637 // warning: this is an expensive function!
 638 void Mod_BuildTextureVectorsAndNormals(int numverts, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f)
 639 {
 640         int i, tnum;
 641         float sdir[3], tdir[3], normal[3], *v;
 642         const int *e;
 643         // clear the vectors
 644         if (svector3f)
 645                 memset(svector3f, 0, numverts * sizeof(float[3]));
 646         if (tvector3f)
 647                 memset(tvector3f, 0, numverts * sizeof(float[3]));
 648         if (normal3f)
 649                 memset(normal3f, 0, numverts * sizeof(float[3]));
 650         // process each vertex of each triangle and accumulate the results
 651         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 652         {
 653                 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);
 654                 if (svector3f)
 655                 {
 656                         for (i = 0;i < 3;i++)
 657                         {
 658                                 svector3f[e[i]*3  ] += sdir[0];
 659                                 svector3f[e[i]*3+1] += sdir[1];
 660                                 svector3f[e[i]*3+2] += sdir[2];
 661                         }
 662                 }
 663                 if (tvector3f)
 664                 {
 665                         for (i = 0;i < 3;i++)
 666                         {
 667                                 tvector3f[e[i]*3  ] += tdir[0];
 668                                 tvector3f[e[i]*3+1] += tdir[1];
 669                                 tvector3f[e[i]*3+2] += tdir[2];
 670                         }
 671                 }
 672                 if (normal3f)
 673                 {
 674                         for (i = 0;i < 3;i++)
 675                         {
 676                                 normal3f[e[i]*3  ] += normal[0];
 677                                 normal3f[e[i]*3+1] += normal[1];
 678                                 normal3f[e[i]*3+2] += normal[2];
 679                         }
 680                 }
 681         }
 682         // now we could divide the vectors by the number of averaged values on
 683         // each vertex...  but instead normalize them
 684         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 685         if (svector3f)
 686                 for (i = 0, v = svector3f;i < numverts;i++, v += 3)
 687                         VectorNormalize(v);
 688         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 689         if (tvector3f)
 690                 for (i = 0, v = tvector3f;i < numverts;i++, v += 3)
 691                         VectorNormalize(v);
 692         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 693         if (normal3f)
 694                 for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 695                         VectorNormalize(v);
 696 }
 697
 698 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)
 699 {
 700         shadowmesh_t *newmesh;
 701         qbyte *data;
 702         int size;
 703         size = sizeof(shadowmesh_t);
 704         size += maxverts * sizeof(float[3]);
 705         if (light)
 706                 size += maxverts * sizeof(float[11]);
 707         size += maxtriangles * sizeof(int[3]);
 708         if (neighbors)
 709                 size += maxtriangles * sizeof(int[3]);
 710         if (expandable)
 711                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 712         data = Mem_Alloc(mempool, size);
 713         newmesh = (void *)data;data += sizeof(*newmesh);
 714         newmesh->map_diffuse = map_diffuse;
 715         newmesh->map_specular = map_specular;
 716         newmesh->map_normal = map_normal;
 717         newmesh->maxverts = maxverts;
 718         newmesh->maxtriangles = maxtriangles;
 719         newmesh->numverts = 0;
 720         newmesh->numtriangles = 0;
 721
 722         newmesh->vertex3f = (void *)data;data += maxverts * sizeof(float[3]);
 723         if (light)
 724         {
 725                 newmesh->svector3f = (void *)data;data += maxverts * sizeof(float[3]);
 726                 newmesh->tvector3f = (void *)data;data += maxverts * sizeof(float[3]);
 727                 newmesh->normal3f = (void *)data;data += maxverts * sizeof(float[3]);
 728                 newmesh->texcoord2f = (void *)data;data += maxverts * sizeof(float[2]);
 729         }
 730         newmesh->element3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 731         if (neighbors)
 732         {
 733                 newmesh->neighbor3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 734         }
 735         if (expandable)
 736         {
 737                 newmesh->vertexhashtable = (void *)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 738                 newmesh->vertexhashentries = (void *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 739         }
 740         return newmesh;
 741 }
 742
 743 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 744 {
 745         shadowmesh_t *newmesh;
 746         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 747         newmesh->numverts = oldmesh->numverts;
 748         newmesh->numtriangles = oldmesh->numtriangles;
 749
 750         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 751         if (newmesh->svector3f && oldmesh->svector3f)
 752         {
 753                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 754                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 755                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 756                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 757         }
 758         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 759         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 760                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 761         return newmesh;
 762 }
 763
 764 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 765 {
 766         int hashindex, vnum;
 767         shadowmeshvertexhash_t *hash;
 768         // this uses prime numbers intentionally
 769         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 770         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 771         {
 772                 vnum = (hash - mesh->vertexhashentries);
 773                 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]))
 774                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 775                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 776                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 777                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 778                         return hash - mesh->vertexhashentries;
 779         }
 780         vnum = mesh->numverts++;
 781         hash = mesh->vertexhashentries + vnum;
 782         hash->next = mesh->vertexhashtable[hashindex];
 783         mesh->vertexhashtable[hashindex] = hash;
 784         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 785         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 786         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 787         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 788         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 789         return vnum;
 790 }
 791
 792 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 793 {
 794         if (mesh->numtriangles == 0)
 795         {
 796                 // set the properties on this empty mesh to be more favorable...
 797                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 798                 mesh->map_diffuse = map_diffuse;
 799                 mesh->map_specular = map_specular;
 800                 mesh->map_normal = map_normal;
 801         }
 802         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)
 803         {
 804                 if (mesh->next == NULL)
 805                         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);
 806                 mesh = mesh->next;
 807         }
 808         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 809         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 810         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 811         mesh->numtriangles++;
 812 }
 813
 814 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)
 815 {
 816         int i, j, e;
 817         float vbuf[3*14], *v;
 818         memset(vbuf, 0, sizeof(vbuf));
 819         for (i = 0;i < numtris;i++)
 820         {
 821                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 822                 {
 823                         e = *element3i++;
 824                         if (vertex3f)
 825                         {
 826                                 v[0] = vertex3f[e * 3 + 0];
 827                                 v[1] = vertex3f[e * 3 + 1];
 828                                 v[2] = vertex3f[e * 3 + 2];
 829                         }
 830                         if (svector3f)
 831                         {
 832                                 v[3] = svector3f[e * 3 + 0];
 833                                 v[4] = svector3f[e * 3 + 1];
 834                                 v[5] = svector3f[e * 3 + 2];
 835                         }
 836                         if (tvector3f)
 837                         {
 838                                 v[6] = tvector3f[e * 3 + 0];
 839                                 v[7] = tvector3f[e * 3 + 1];
 840                                 v[8] = tvector3f[e * 3 + 2];
 841                         }
 842                         if (normal3f)
 843                         {
 844                                 v[9] = normal3f[e * 3 + 0];
 845                                 v[10] = normal3f[e * 3 + 1];
 846                                 v[11] = normal3f[e * 3 + 2];
 847                         }
 848                         if (texcoord2f)
 849                         {
 850                                 v[12] = texcoord2f[e * 2 + 0];
 851                                 v[13] = texcoord2f[e * 2 + 1];
 852                         }
 853                 }
 854                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 855         }
 856 }
 857
 858 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)
 859 {
 860         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 861 }
 862
 863 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 864 {
 865         shadowmesh_t *mesh, *newmesh, *nextmesh;
 866         // reallocate meshs to conserve space
 867         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 868         {
 869                 nextmesh = mesh->next;
 870                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 871                 {
 872                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 873                         newmesh->next = firstmesh;
 874                         firstmesh = newmesh;
 875                 }
 876                 Mem_Free(mesh);
 877         }
 878         return firstmesh;
 879 }
 880
 881 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 882 {
 883         int i;
 884         shadowmesh_t *mesh;
 885         vec3_t nmins, nmaxs, ncenter, temp;
 886         float nradius2, dist2, *v;
 887         // calculate bbox
 888         for (mesh = firstmesh;mesh;mesh = mesh->next)
 889         {
 890                 if (mesh == firstmesh)
 891                 {
 892                         VectorCopy(mesh->vertex3f, nmins);
 893                         VectorCopy(mesh->vertex3f, nmaxs);
 894                 }
 895                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 896                 {
 897                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 898                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 899                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 900                 }
 901         }
 902         // calculate center and radius
 903         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 904         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 905         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 906         nradius2 = 0;
 907         for (mesh = firstmesh;mesh;mesh = mesh->next)
 908         {
 909                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 910                 {
 911                         VectorSubtract(v, ncenter, temp);
 912                         dist2 = DotProduct(temp, temp);
 913                         if (nradius2 < dist2)
 914                                 nradius2 = dist2;
 915                 }
 916         }
 917         // return data
 918         if (mins)
 919                 VectorCopy(nmins, mins);
 920         if (maxs)
 921                 VectorCopy(nmaxs, maxs);
 922         if (center)
 923                 VectorCopy(ncenter, center);
 924         if (radius)
 925                 *radius = sqrt(nradius2);
 926 }
 927
 928 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 929 {
 930         shadowmesh_t *nextmesh;
 931         for (;mesh;mesh = nextmesh)
 932         {
 933                 nextmesh = mesh->next;
 934                 Mem_Free(mesh);
 935         }
 936 }
 937
 938 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 939 {
 940         int i;
 941         for (i = 0;i < width*height;i++)
 942                 if (((qbyte *)&palette[in[i]])[3] > 0)
 943                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 944         return NULL;
 945 }
 946
 947 static int detailtexturecycle = 0;
 948 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
 949 {
 950         imageskin_t s;
 951         memset(skinframe, 0, sizeof(*skinframe));
 952         if (!image_loadskin(&s, basename))
 953                 return false;
 954         if (usedetailtexture)
 955                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 956         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 957         if (s.nmappixels != NULL)
 958                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 959         if (s.glosspixels != NULL)
 960                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 961         if (s.glowpixels != NULL && loadglowtexture)
 962                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 963         if (s.maskpixels != NULL)
 964                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 965         if (loadpantsandshirt)
 966         {
 967                 if (s.pantspixels != NULL)
 968                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 969                 if (s.shirtpixels != NULL)
 970                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 971         }
 972         image_freeskin(&s);
 973         return true;
 974 }
 975
 976 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
 977 {
 978         qbyte *temp1, *temp2;
 979         memset(skinframe, 0, sizeof(*skinframe));
 980         if (!skindata)
 981                 return false;
 982         if (usedetailtexture)
 983                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 984         if (r_shadow_bumpscale_basetexture.value > 0)
 985         {
 986                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
 987                 temp2 = temp1 + width * height * 4;
 988                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
 989                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
 990                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
 991                 Mem_Free(temp1);
 992         }
 993         if (loadglowtexture)
 994         {
 995                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
 996                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
 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_nocolormapnofullbrights, textureflags); // no special colors
1003                 }
1004         }
1005         else
1006         {
1007                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
1008                 if (loadpantsandshirt)
1009                 {
1010                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1011                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1012                         if (skinframe->pants || skinframe->shirt)
1013                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
1014                 }
1015         }
1016         return true;
1017 }
1018
1019 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1020 {
1021         float v[3], tc[3];
1022         v[0] = ix;
1023         v[1] = iy;
1024         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1025                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1026         else
1027                 v[2] = 0;
1028         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1029         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1030         texcoord2f[0] = tc[0];
1031         texcoord2f[1] = tc[1];
1032 }
1033
1034 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)
1035 {
1036         float vup[3], vdown[3], vleft[3], vright[3];
1037         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1038         float sv[3], tv[3], nl[3];
1039         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1040         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1041         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1042         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1043         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1044         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1045         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1046         VectorAdd(svector3f, sv, svector3f);
1047         VectorAdd(tvector3f, tv, tvector3f);
1048         VectorAdd(normal3f, nl, normal3f);
1049         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1050         VectorAdd(svector3f, sv, svector3f);
1051         VectorAdd(tvector3f, tv, tvector3f);
1052         VectorAdd(normal3f, nl, normal3f);
1053         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1054         VectorAdd(svector3f, sv, svector3f);
1055         VectorAdd(tvector3f, tv, tvector3f);
1056         VectorAdd(normal3f, nl, normal3f);
1057 }
1058
1059 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)
1060 {
1061         int x, y, ix, iy, *e;
1062         e = element3i;
1063         for (y = 0;y < height;y++)
1064         {
1065                 for (x = 0;x < width;x++)
1066                 {
1067                         e[0] = (y + 1) * (width + 1) + (x + 0);
1068                         e[1] = (y + 0) * (width + 1) + (x + 0);
1069                         e[2] = (y + 1) * (width + 1) + (x + 1);
1070                         e[3] = (y + 0) * (width + 1) + (x + 0);
1071                         e[4] = (y + 0) * (width + 1) + (x + 1);
1072                         e[5] = (y + 1) * (width + 1) + (x + 1);
1073                         e += 6;
1074                 }
1075         }
1076         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1077         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1078                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1079                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1080 }
1081
1082 skinfile_t *Mod_LoadSkinFiles(void)
1083 {
1084         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1085         char *text;
1086         const char *data;
1087         skinfile_t *skinfile, *first = NULL;
1088         skinfileitem_t *skinfileitem;
1089         char word[10][MAX_QPATH];
1090         overridetagnameset_t tagsets[MAX_SKINS];
1091         overridetagname_t tags[256];
1092
1093 /*
1094 sample file:
1095 U_bodyBox,models/players/Legoman/BikerA2.tga
1096 U_RArm,models/players/Legoman/BikerA1.tga
1097 U_LArm,models/players/Legoman/BikerA1.tga
1098 U_armor,common/nodraw
1099 U_sword,common/nodraw
1100 U_shield,common/nodraw
1101 U_homb,common/nodraw
1102 U_backpack,common/nodraw
1103 U_colcha,common/nodraw
1104 tag_head,
1105 tag_weapon,
1106 tag_torso,
1107 */
1108         memset(tagsets, 0, sizeof(tagsets));
1109         memset(word, 0, sizeof(word));
1110         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), true));i++)
1111         {
1112                 numtags = 0;
1113                 skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1114                 skinfile->next = first;
1115                 first = skinfile;
1116                 for(line = 0;;line++)
1117                 {
1118                         // parse line
1119                         if (!COM_ParseToken(&data, true))
1120                                 break;
1121                         if (!strcmp(com_token, "\n"))
1122                                 continue;
1123                         words = 0;
1124                         wordsoverflow = false;
1125                         do
1126                         {
1127                                 if (words < 10)
1128                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1129                                 else
1130                                         wordsoverflow = true;
1131                         }
1132                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1133                         if (wordsoverflow)
1134                         {
1135                                 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);
1136                                 continue;
1137                         }
1138                         // words is always >= 1
1139                         if (!strcmp(word[0], "replace"))
1140                         {
1141                                 if (words == 3)
1142                                 {
1143                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1144                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1145                                         skinfileitem->next = skinfile->items;
1146                                         skinfile->items = skinfileitem;
1147                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1148                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1149                                 }
1150                                 else
1151                                         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]);
1152                         }
1153                         else if (words == 2 && !strcmp(word[1], ","))
1154                         {
1155                                 // tag name, like "tag_weapon,"
1156                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1157                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1158                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1159                                 numtags++;
1160                         }
1161                         else if (words == 3 && !strcmp(word[1], ","))
1162                         {
1163                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1164                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1165                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1166                                 skinfileitem->next = skinfile->items;
1167                                 skinfile->items = skinfileitem;
1168                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1169                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1170                         }
1171                         else
1172                                 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);
1173                 }
1174                 Mem_Free(text);
1175
1176                 if (numtags)
1177                 {
1178                         overridetagnameset_t *t;
1179                         t = tagsets + i;
1180                         t->num_overridetagnames = numtags;
1181                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1182                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1183                         tagsetsused = true;
1184                 }
1185         }
1186         if (tagsetsused)
1187         {
1188                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1189                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1190         }
1191         if (i)
1192                 loadmodel->numskins = i;
1193         return first;
1194 }
1195
1196 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1197 {
1198         skinfile_t *next;
1199         skinfileitem_t *skinfileitem, *nextitem;
1200         for (;skinfile;skinfile = next)
1201         {
1202                 next = skinfile->next;
1203                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1204                 {
1205                         nextitem = skinfileitem->next;
1206                         Mem_Free(skinfileitem);
1207                 }
1208                 Mem_Free(skinfile);
1209         }
1210 }
1211
1212 int Mod_CountSkinFiles(skinfile_t *skinfile)
1213 {
1214         int i;
1215         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1216         return i;
1217 }
1218
1219 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1220 {
1221         int i, outtriangles;
1222         float d, edgedir[3], temp[3];
1223         // a degenerate triangle is one with no width (thickness, surface area)
1224         // these are characterized by having all 3 points colinear (along a line)
1225         // or having two points identical
1226         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1227         {
1228                 // calculate first edge
1229                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1230                 if (VectorLength2(edgedir) < 0.0001f)
1231                         continue; // degenerate first edge (no length)
1232                 VectorNormalize(edgedir);
1233                 // check if third point is on the edge (colinear)
1234                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1235                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1236                 if (VectorLength2(temp) < 0.0001f)
1237                         continue; // third point colinear with first edge
1238                 // valid triangle (no colinear points, no duplicate points)
1239                 VectorCopy(inelement3i, outelement3i);
1240                 outelement3i += 3;
1241                 outtriangles++;
1242         }
1243         return outtriangles;
1244 }
1245