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 int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 494 {
 495         int i, match, count;
 496         count = 0;
 497         match = -1;
 498         for (i = 0;i < numtriangles;i++, elements += 3)
 499         {
 500                      if ((elements[0] == start && elements[1] == end)
 501                       || (elements[1] == start && elements[2] == end)
 502                       || (elements[2] == start && elements[0] == end))
 503                 {
 504                         if (i != ignore)
 505                                 match = i;
 506                         count++;
 507                 }
 508                 else if ((elements[1] == start && elements[0] == end)
 509                       || (elements[2] == start && elements[1] == end)
 510                       || (elements[0] == start && elements[2] == end))
 511                         count++;
 512         }
 513         // detect edges shared by three triangles and make them seams
 514         if (count > 2)
 515                 match = -1;
 516         return match;
 517 }
 518
 519 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 520 {
 521         int i, *n;
 522         const int *e;
 523         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 524         {
 525                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 526                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 527                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 528         }
 529 }
 530
 531 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 532 {
 533         int i;
 534         for (i = 0;i < numtriangles * 3;i++)
 535                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 536                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 537 }
 538
 539 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)
 540 {
 541         float f;
 542         normal3f[0] = (v1[1] - v0[1]) * (v2[2] - v0[2]) - (v1[2] - v0[2]) * (v2[1] - v0[1]);
 543         normal3f[1] = (v1[2] - v0[2]) * (v2[0] - v0[0]) - (v1[0] - v0[0]) * (v2[2] - v0[2]);
 544         normal3f[2] = (v1[0] - v0[0]) * (v2[1] - v0[1]) - (v1[1] - v0[1]) * (v2[0] - v0[0]);
 545         VectorNormalize(normal3f);
 546         tvector3f[0] = ((tc1[0] - tc0[0]) * (v2[0] - v0[0]) - (tc2[0] - tc0[0]) * (v1[0] - v0[0]));
 547         tvector3f[1] = ((tc1[0] - tc0[0]) * (v2[1] - v0[1]) - (tc2[0] - tc0[0]) * (v1[1] - v0[1]));
 548         tvector3f[2] = ((tc1[0] - tc0[0]) * (v2[2] - v0[2]) - (tc2[0] - tc0[0]) * (v1[2] - v0[2]));
 549         f = -DotProduct(tvector3f, normal3f);
 550         VectorMA(tvector3f, f, normal3f, tvector3f);
 551         VectorNormalize(tvector3f);
 552         CrossProduct(normal3f, tvector3f, svector3f);
 553 }
 554
 555 // warning: this is an expensive function!
 556 void Mod_BuildTextureVectorsAndNormals(int numverts, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f)
 557 {
 558         int i, tnum;
 559         float sdir[3], tdir[3], normal[3], *v;
 560         const int *e;
 561         // clear the vectors
 562         if (svector3f)
 563                 memset(svector3f, 0, numverts * sizeof(float[3]));
 564         if (tvector3f)
 565                 memset(tvector3f, 0, numverts * sizeof(float[3]));
 566         if (normal3f)
 567                 memset(normal3f, 0, numverts * sizeof(float[3]));
 568         // process each vertex of each triangle and accumulate the results
 569         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 570         {
 571                 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);
 572                 if (svector3f)
 573                 {
 574                         for (i = 0;i < 3;i++)
 575                         {
 576                                 svector3f[e[i]*3  ] += sdir[0];
 577                                 svector3f[e[i]*3+1] += sdir[1];
 578                                 svector3f[e[i]*3+2] += sdir[2];
 579                         }
 580                 }
 581                 if (tvector3f)
 582                 {
 583                         for (i = 0;i < 3;i++)
 584                         {
 585                                 tvector3f[e[i]*3  ] += tdir[0];
 586                                 tvector3f[e[i]*3+1] += tdir[1];
 587                                 tvector3f[e[i]*3+2] += tdir[2];
 588                         }
 589                 }
 590                 if (normal3f)
 591                 {
 592                         for (i = 0;i < 3;i++)
 593                         {
 594                                 normal3f[e[i]*3  ] += normal[0];
 595                                 normal3f[e[i]*3+1] += normal[1];
 596                                 normal3f[e[i]*3+2] += normal[2];
 597                         }
 598                 }
 599         }
 600         // now we could divide the vectors by the number of averaged values on
 601         // each vertex...  but instead normalize them
 602         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 603         if (svector3f)
 604                 for (i = 0, v = svector3f;i < numverts;i++, v += 3)
 605                         VectorNormalize(v);
 606         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 607         if (tvector3f)
 608                 for (i = 0, v = tvector3f;i < numverts;i++, v += 3)
 609                         VectorNormalize(v);
 610         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 611         if (normal3f)
 612                 for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 613                         VectorNormalize(v);
 614 }
 615
 616 shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts)
 617 {
 618         shadowmesh_t *mesh;
 619         mesh = Mem_Alloc(mempool, sizeof(shadowmesh_t) + maxverts * sizeof(float[3]) + maxverts * sizeof(int[3]) + maxverts * sizeof(int[3]) + SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t));
 620         mesh->maxverts = maxverts;
 621         mesh->maxtriangles = maxverts;
 622         mesh->numverts = 0;
 623         mesh->numtriangles = 0;
 624         mesh->vertex3f = (float *)(mesh + 1);
 625         mesh->element3i = (int *)(mesh->vertex3f + mesh->maxverts * 3);
 626         mesh->neighbor3i = (int *)(mesh->element3i + mesh->maxtriangles * 3);
 627         mesh->vertexhashtable = (shadowmeshvertexhash_t **)(mesh->neighbor3i + mesh->maxtriangles * 3);
 628         mesh->vertexhashentries = (shadowmeshvertexhash_t *)(mesh->vertexhashtable + SHADOWMESHVERTEXHASH);
 629         return mesh;
 630 }
 631
 632 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh)
 633 {
 634         shadowmesh_t *newmesh;
 635         newmesh = Mem_Alloc(mempool, sizeof(shadowmesh_t) + oldmesh->numverts * sizeof(float[3]) + oldmesh->numtriangles * sizeof(int[3]) + oldmesh->numtriangles * sizeof(int[3]));
 636         newmesh->maxverts = newmesh->numverts = oldmesh->numverts;
 637         newmesh->maxtriangles = newmesh->numtriangles = oldmesh->numtriangles;
 638         newmesh->vertex3f = (float *)(newmesh + 1);
 639         newmesh->element3i = (int *)(newmesh->vertex3f + newmesh->maxverts * 3);
 640         newmesh->neighbor3i = (int *)(newmesh->element3i + newmesh->maxtriangles * 3);
 641         memcpy(newmesh->vertex3f, oldmesh->vertex3f, newmesh->numverts * sizeof(float[3]));
 642         memcpy(newmesh->element3i, oldmesh->element3i, newmesh->numtriangles * sizeof(int[3]));
 643         memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, newmesh->numtriangles * sizeof(int[3]));
 644         return newmesh;
 645 }
 646
 647 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *v)
 648 {
 649         int hashindex;
 650         float *m;
 651         shadowmeshvertexhash_t *hash;
 652         // this uses prime numbers intentionally
 653         hashindex = (int) (v[0] * 3 + v[1] * 5 + v[2] * 7) % SHADOWMESHVERTEXHASH;
 654         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 655         {
 656                 m = mesh->vertex3f + (hash - mesh->vertexhashentries) * 3;
 657                 if (m[0] == v[0] && m[1] == v[1] &&  m[2] == v[2])
 658                         return hash - mesh->vertexhashentries;
 659         }
 660         hash = mesh->vertexhashentries + mesh->numverts;
 661         hash->next = mesh->vertexhashtable[hashindex];
 662         mesh->vertexhashtable[hashindex] = hash;
 663         m = mesh->vertex3f + (hash - mesh->vertexhashentries) * 3;
 664         VectorCopy(v, m);
 665         mesh->numverts++;
 666         return mesh->numverts - 1;
 667 }
 668
 669 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, float *vert0, float *vert1, float *vert2)
 670 {
 671         while (mesh->numverts + 3 > mesh->maxverts || mesh->numtriangles + 1 > mesh->maxtriangles)
 672         {
 673                 if (mesh->next == NULL)
 674                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxtriangles, 1));
 675                 mesh = mesh->next;
 676         }
 677         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vert0);
 678         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vert1);
 679         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vert2);
 680         mesh->numtriangles++;
 681 }
 682
 683 void Mod_ShadowMesh_AddPolygon(mempool_t *mempool, shadowmesh_t *mesh, int numverts, float *verts)
 684 {
 685         int i;
 686         float *v;
 687         for (i = 0, v = verts + 3;i < numverts - 2;i++, v += 3)
 688                 Mod_ShadowMesh_AddTriangle(mempool, mesh, verts, v, v + 3);
 689         /*
 690         int i, i1, i2, i3;
 691         float *v;
 692         while (mesh->num_vertices + numverts > mesh->maxverts || mesh->num_triangles + (numverts - 2) > mesh->maxtriangles)
 693         {
 694                 if (mesh->next == NULL)
 695                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxtriangles, numverts));
 696                 mesh = mesh->next;
 697         }
 698         i1 = Mod_ShadowMesh_AddVertex(mesh, verts);
 699         i2 = 0;
 700         i3 = Mod_ShadowMesh_AddVertex(mesh, verts + 3);
 701         for (i = 0, v = verts + 6;i < numverts - 2;i++, v += 3)
 702         {
 703                 i2 = i3;
 704                 i3 = Mod_ShadowMesh_AddVertex(mesh, v);
 705                 mesh->elements[mesh->num_triangles * 3 + 0] = i1;
 706                 mesh->elements[mesh->num_triangles * 3 + 1] = i2;
 707                 mesh->elements[mesh->num_triangles * 3 + 2] = i3;
 708                 mesh->num_triangles++;
 709         }
 710         */
 711 }
 712
 713 void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, float *verts, int numtris, int *elements)
 714 {
 715         int i;
 716         for (i = 0;i < numtris;i++, elements += 3)
 717                 Mod_ShadowMesh_AddTriangle(mempool, mesh, verts + elements[0] * 3, verts + elements[1] * 3, verts + elements[2] * 3);
 718 }
 719
 720 shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int initialnumtriangles)
 721 {
 722         return Mod_ShadowMesh_Alloc(mempool, initialnumtriangles);
 723 }
 724
 725 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh)
 726 {
 727 #if 1
 728         //int i;
 729         shadowmesh_t *mesh, *newmesh, *nextmesh;
 730         // reallocate meshs to conserve space
 731         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 732         {
 733                 nextmesh = mesh->next;
 734                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 735                 {
 736                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh);
 737                         newmesh->next = firstmesh;
 738                         firstmesh = newmesh;
 739                         //Con_Printf("mesh\n");
 740                         //for (i = 0;i < newmesh->num_triangles;i++)
 741                         //      Con_Printf("tri %d %d %d\n", newmesh->elements[i * 3 + 0], newmesh->elements[i * 3 + 1], newmesh->elements[i * 3 + 2]);
 742                         Mod_ValidateElements(newmesh->element3i, newmesh->numtriangles, newmesh->numverts, __FILE__, __LINE__);
 743                         Mod_BuildTriangleNeighbors(newmesh->neighbor3i, newmesh->element3i, newmesh->numtriangles);
 744                 }
 745                 Mem_Free(mesh);
 746         }
 747 #else
 748         shadowmesh_t *mesh;
 749         for (mesh = firstmesh;mesh;mesh = mesh->next)
 750         {
 751                 Mod_ValidateElements(mesh->elements, mesh->num_triangles, mesh->num_vertices, __FILE__, __LINE__);
 752                 Mod_BuildTriangleNeighbors(mesh->neighbors, mesh->elements, mesh->num_triangles);
 753         }
 754 #endif
 755         return firstmesh;
 756 }
 757
 758 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 759 {
 760         int i;
 761         shadowmesh_t *mesh;
 762         vec3_t nmins, nmaxs, ncenter, temp;
 763         float nradius2, dist2, *v;
 764         // calculate bbox
 765         for (mesh = firstmesh;mesh;mesh = mesh->next)
 766         {
 767                 if (mesh == firstmesh)
 768                 {
 769                         VectorCopy(mesh->vertex3f, nmins);
 770                         VectorCopy(mesh->vertex3f, nmaxs);
 771                 }
 772                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 773                 {
 774                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 775                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 776                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 777                 }
 778         }
 779         // calculate center and radius
 780         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 781         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 782         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 783         nradius2 = 0;
 784         for (mesh = firstmesh;mesh;mesh = mesh->next)
 785         {
 786                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 787                 {
 788                         VectorSubtract(v, ncenter, temp);
 789                         dist2 = DotProduct(temp, temp);
 790                         if (nradius2 < dist2)
 791                                 nradius2 = dist2;
 792                 }
 793         }
 794         // return data
 795         if (mins)
 796                 VectorCopy(nmins, mins);
 797         if (maxs)
 798                 VectorCopy(nmaxs, maxs);
 799         if (center)
 800                 VectorCopy(ncenter, center);
 801         if (radius)
 802                 *radius = sqrt(nradius2);
 803 }
 804
 805 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 806 {
 807         shadowmesh_t *nextmesh;
 808         for (;mesh;mesh = nextmesh)
 809         {
 810                 nextmesh = mesh->next;
 811                 Mem_Free(mesh);
 812         }
 813 }
 814
 815 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 816 {
 817         int i;
 818         for (i = 0;i < width*height;i++)
 819                 if (((qbyte *)&palette[in[i]])[3] > 0)
 820                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 821         return NULL;
 822 }
 823
 824 static int detailtexturecycle = 0;
 825 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
 826 {
 827         imageskin_t s;
 828         memset(skinframe, 0, sizeof(*skinframe));
 829         if (!image_loadskin(&s, basename))
 830                 return false;
 831         if (usedetailtexture)
 832                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 833         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 834         if (s.nmappixels != NULL)
 835                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 836         if (s.glosspixels != NULL)
 837                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 838         if (s.glowpixels != NULL && loadglowtexture)
 839                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 840         if (s.maskpixels != NULL)
 841                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 842         if (loadpantsandshirt)
 843         {
 844                 if (s.pantspixels != NULL)
 845                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 846                 if (s.shirtpixels != NULL)
 847                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 848         }
 849         image_freeskin(&s);
 850         return true;
 851 }
 852
 853 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
 854 {
 855         qbyte *temp1, *temp2;
 856         memset(skinframe, 0, sizeof(*skinframe));
 857         if (!skindata)
 858                 return false;
 859         if (usedetailtexture)
 860                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 861         if (r_shadow_bumpscale_basetexture.value > 0)
 862         {
 863                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
 864                 temp2 = temp1 + width * height * 4;
 865                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
 866                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
 867                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
 868                 Mem_Free(temp1);
 869         }
 870         if (loadglowtexture)
 871         {
 872                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
 873                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
 874                 if (loadpantsandshirt)
 875                 {
 876                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 877                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 878                         if (skinframe->pants || skinframe->shirt)
 879                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormapnofullbrights, textureflags); // no special colors
 880                 }
 881         }
 882         else
 883         {
 884                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
 885                 if (loadpantsandshirt)
 886                 {
 887                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 888                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 889                         if (skinframe->pants || skinframe->shirt)
 890                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
 891                 }
 892         }
 893         return true;
 894 }
 895
 896 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
 897 {
 898         float v[3], tc[3];
 899         v[0] = ix;
 900         v[1] = iy;
 901         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
 902                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
 903         else
 904                 v[2] = 0;
 905         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
 906         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
 907         texcoord2f[0] = tc[0];
 908         texcoord2f[1] = tc[1];
 909 }
 910
 911 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)
 912 {
 913         float vup[3], vdown[3], vleft[3], vright[3];
 914         float tcup[3], tcdown[3], tcleft[3], tcright[3];
 915         float sv[3], tv[3], nl[3];
 916         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
 917         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
 918         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
 919         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
 920         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
 921         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
 922         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
 923         VectorAdd(svector3f, sv, svector3f);
 924         VectorAdd(tvector3f, tv, tvector3f);
 925         VectorAdd(normal3f, nl, normal3f);
 926         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
 927         VectorAdd(svector3f, sv, svector3f);
 928         VectorAdd(tvector3f, tv, tvector3f);
 929         VectorAdd(normal3f, nl, normal3f);
 930         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
 931         VectorAdd(svector3f, sv, svector3f);
 932         VectorAdd(tvector3f, tv, tvector3f);
 933         VectorAdd(normal3f, nl, normal3f);
 934 }
 935
 936 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)
 937 {
 938         int x, y, ix, iy, *e;
 939         e = element3i;
 940         for (y = 0;y < height;y++)
 941         {
 942                 for (x = 0;x < width;x++)
 943                 {
 944                         e[0] = (y + 1) * (width + 1) + (x + 0);
 945                         e[1] = (y + 0) * (width + 1) + (x + 0);
 946                         e[2] = (y + 1) * (width + 1) + (x + 1);
 947                         e[3] = (y + 0) * (width + 1) + (x + 0);
 948                         e[4] = (y + 0) * (width + 1) + (x + 1);
 949                         e[5] = (y + 1) * (width + 1) + (x + 1);
 950                         e += 6;
 951                 }
 952         }
 953         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
 954         for (y = 0, iy = y1;y < height + 1;y++, iy++)
 955                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
 956                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
 957 }
 958
 959 skinfile_t *Mod_LoadSkinFiles(void)
 960 {
 961         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
 962         char *text;
 963         const char *data;
 964         skinfile_t *skinfile, *first = NULL;
 965         skinfileitem_t *skinfileitem;
 966         char word[10][MAX_QPATH];
 967         overridetagnameset_t tagsets[MAX_SKINS];
 968         overridetagname_t tags[256];
 969
 970 /*
 971 sample file:
 972 U_bodyBox,models/players/Legoman/BikerA2.tga
 973 U_RArm,models/players/Legoman/BikerA1.tga
 974 U_LArm,models/players/Legoman/BikerA1.tga
 975 U_armor,common/nodraw
 976 U_sword,common/nodraw
 977 U_shield,common/nodraw
 978 U_homb,common/nodraw
 979 U_backpack,common/nodraw
 980 U_colcha,common/nodraw
 981 tag_head,
 982 tag_weapon,
 983 tag_torso,
 984 */
 985         memset(tagsets, 0, sizeof(tagsets));
 986         memset(word, 0, sizeof(word));
 987         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), true));i++)
 988         {
 989                 numtags = 0;
 990                 skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
 991                 skinfile->next = first;
 992                 first = skinfile;
 993                 for(line = 0;;line++)
 994                 {
 995                         // parse line
 996                         if (!COM_ParseToken(&data, true))
 997                                 break;
 998                         if (!strcmp(com_token, "\n"))
 999                                 continue;
1000                         words = 0;
1001                         wordsoverflow = false;
1002                         do
1003                         {
1004                                 if (words < 10)
1005                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1006                                 else
1007                                         wordsoverflow = true;
1008                         }
1009                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1010                         if (wordsoverflow)
1011                         {
1012                                 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);
1013                                 continue;
1014                         }
1015                         // words is always >= 1
1016                         if (!strcmp(word[0], "replace"))
1017                         {
1018                                 if (words == 3)
1019                                 {
1020                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1021                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1022                                         skinfileitem->next = skinfile->items;
1023                                         skinfile->items = skinfileitem;
1024                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1025                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1026                                 }
1027                                 else
1028                                         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]);
1029                         }
1030                         else if (words == 2 && !strcmp(word[1], ","))
1031                         {
1032                                 // tag name, like "tag_weapon,"
1033                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1034                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1035                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1036                                 numtags++;
1037                         }
1038                         else if (words == 3 && !strcmp(word[1], ","))
1039                         {
1040                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1041                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1042                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1043                                 skinfileitem->next = skinfile->items;
1044                                 skinfile->items = skinfileitem;
1045                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1046                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1047                         }
1048                         else
1049                                 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);
1050                 }
1051                 Mem_Free(text);
1052
1053                 if (numtags)
1054                 {
1055                         overridetagnameset_t *t;
1056                         t = tagsets + i;
1057                         t->num_overridetagnames = numtags;
1058                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1059                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1060                         tagsetsused = true;
1061                 }
1062         }
1063         if (tagsetsused)
1064         {
1065                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1066                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1067         }
1068         if (i)
1069                 loadmodel->numskins = i;
1070         return first;
1071 }
1072
1073 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1074 {
1075         skinfile_t *next;
1076         skinfileitem_t *skinfileitem, *nextitem;
1077         for (;skinfile;skinfile = next)
1078         {
1079                 next = skinfile->next;
1080                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1081                 {
1082                         nextitem = skinfileitem->next;
1083                         Mem_Free(skinfileitem);
1084                 }
1085                 Mem_Free(skinfile);
1086         }
1087 }
1088
1089 int Mod_CountSkinFiles(skinfile_t *skinfile)
1090 {
1091         int i;
1092         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1093         return i;
1094 }
1095
1096 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1097 {
1098         int i, outtriangles;
1099         float d, edgedir[3], temp[3];
1100         // a degenerate triangle is one with no width (thickness, surface area)
1101         // these are characterized by having all 3 points colinear (along a line)
1102         // or having two points identical
1103         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1104         {
1105                 // calculate first edge
1106                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1107                 if (VectorLength2(edgedir) < 0.0001f)
1108                         continue; // degenerate first edge (no length)
1109                 VectorNormalize(edgedir);
1110                 // check if third point is on the edge (colinear)
1111                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1112                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1113                 if (VectorLength2(temp) < 0.0001f)
1114                         continue; // third point colinear with first edge
1115                 // valid triangle (no colinear points, no duplicate points)
1116                 VectorCopy(inelement3i, outelement3i);
1117                 outelement3i += 3;
1118                 outtriangles++;
1119         }
1120         return outtriangles;
1121 }
1122