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;
  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 void Mod_BuildDistortTexture (void)
  83 {
  84         int x, y;
  85 #define DISTORTRESOLUTION 32
  86         qbyte data[DISTORTRESOLUTION][DISTORTRESOLUTION][2];
  87         for (y=0; y<DISTORTRESOLUTION; y++)
  88         {
  89                 for (x=0; x<DISTORTRESOLUTION; x++)
  90                 {
  91                         data[y][x][0] = rand () & 255;
  92                         data[y][x][1] = rand () & 255;
  93                 }
  94         }
  95
  96         mod_shared_distorttexture = R_LoadTexture2D(mod_shared_texturepool, "distorttexture", DISTORTRESOLUTION, DISTORTRESOLUTION, &data[0][0][0], TEXTYPE_DSDT, TEXF_PRECACHE, NULL);
  97         return;
  98 }
  99
 100 texture_t r_surf_notexture;
 101
 102 void Mod_SetupNoTexture(void)
 103 {
 104         int x, y;
 105         qbyte pix[16][16][4];
 106
 107         // this makes a light grey/dark grey checkerboard texture
 108         for (y = 0;y < 16;y++)
 109         {
 110                 for (x = 0;x < 16;x++)
 111                 {
 112                         if ((y < 8) ^ (x < 8))
 113                         {
 114                                 pix[y][x][0] = 128;
 115                                 pix[y][x][1] = 128;
 116                                 pix[y][x][2] = 128;
 117                                 pix[y][x][3] = 255;
 118                         }
 119                         else
 120                         {
 121                                 pix[y][x][0] = 64;
 122                                 pix[y][x][1] = 64;
 123                                 pix[y][x][2] = 64;
 124                                 pix[y][x][3] = 255;
 125                         }
 126                 }
 127         }
 128
 129         r_notexture = R_LoadTexture2D(mod_shared_texturepool, "notexture", 16, 16, &pix[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP, NULL);
 130 }
 131
 132 static void mod_start(void)
 133 {
 134         int i;
 135         for (i = 0;i < MAX_MOD_KNOWN;i++)
 136                 if (mod_known[i].name[0])
 137                         Mod_UnloadModel(&mod_known[i]);
 138         Mod_LoadModels();
 139
 140         mod_shared_texturepool = R_AllocTexturePool();
 141         Mod_SetupNoTexture();
 142         Mod_BuildDetailTextures();
 143         Mod_BuildDistortTexture();
 144 }
 145
 146 static void mod_shutdown(void)
 147 {
 148         int i;
 149         for (i = 0;i < MAX_MOD_KNOWN;i++)
 150                 if (mod_known[i].name[0])
 151                         Mod_UnloadModel(&mod_known[i]);
 152
 153         R_FreeTexturePool(&mod_shared_texturepool);
 154 }
 155
 156 static void mod_newmap(void)
 157 {
 158 }
 159
 160 /*
 161 ===============
 162 Mod_Init
 163 ===============
 164 */
 165 static void Mod_Print (void);
 166 static void Mod_Precache (void);
 167 void Mod_Init (void)
 168 {
 169         Mod_BrushInit();
 170         Mod_AliasInit();
 171         Mod_SpriteInit();
 172
 173         Cvar_RegisterVariable(&r_mipskins);
 174         Cmd_AddCommand ("modellist", Mod_Print);
 175         Cmd_AddCommand ("modelprecache", Mod_Precache);
 176 }
 177
 178 void Mod_RenderInit(void)
 179 {
 180         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 181 }
 182
 183 void Mod_FreeModel (model_t *mod)
 184 {
 185         R_FreeTexturePool(&mod->texturepool);
 186         Mem_FreePool(&mod->mempool);
 187
 188         // clear the struct to make it available
 189         memset(mod, 0, sizeof(model_t));
 190 }
 191
 192 void Mod_UnloadModel (model_t *mod)
 193 {
 194         char name[MAX_QPATH];
 195         qboolean isworldmodel;
 196         strcpy(name, mod->name);
 197         isworldmodel = mod->isworldmodel;
 198         Mod_FreeModel(mod);
 199         strcpy(mod->name, name);
 200         mod->isworldmodel = isworldmodel;
 201         mod->needload = true;
 202 }
 203
 204 /*
 205 ==================
 206 Mod_LoadModel
 207
 208 Loads a model
 209 ==================
 210 */
 211 static model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 212 {
 213         int num;
 214         unsigned int crc;
 215         void *buf;
 216
 217         mod->used = true;
 218
 219         if (mod->name[0] == '*') // submodel
 220                 return mod;
 221
 222         crc = 0;
 223         buf = NULL;
 224         if (!mod->needload)
 225         {
 226                 if (checkdisk)
 227                 {
 228                         buf = FS_LoadFile (mod->name, false);
 229                         if (!buf)
 230                         {
 231                                 if (crash)
 232                                         Host_Error ("Mod_LoadModel: %s not found", mod->name); // LordHavoc: Sys_Error was *ANNOYING*
 233                                 return NULL;
 234                         }
 235
 236                         crc = CRC_Block(buf, fs_filesize);
 237                 }
 238                 else
 239                         crc = mod->crc;
 240
 241                 if (mod->crc == crc && mod->isworldmodel == isworldmodel)
 242                 {
 243                         if (buf)
 244                                 Mem_Free(buf);
 245                         return mod; // already loaded
 246                 }
 247         }
 248
 249         Con_DPrintf("loading model %s\n", mod->name);
 250
 251         if (!buf)
 252         {
 253                 buf = FS_LoadFile (mod->name, false);
 254                 if (!buf)
 255                 {
 256                         if (crash)
 257                                 Host_Error ("Mod_LoadModel: %s not found", mod->name);
 258                         return NULL;
 259                 }
 260                 crc = CRC_Block(buf, fs_filesize);
 261         }
 262
 263         // allocate a new model
 264         loadmodel = mod;
 265
 266         // LordHavoc: unload the existing model in this slot (if there is one)
 267         Mod_UnloadModel(mod);
 268         mod->isworldmodel = isworldmodel;
 269         mod->used = true;
 270         mod->crc = crc;
 271         // errors can prevent the corresponding mod->needload = false;
 272         mod->needload = true;
 273
 274         // all models use memory, so allocate a memory pool
 275         mod->mempool = Mem_AllocPool(mod->name);
 276         // all models load textures, so allocate a texture pool
 277         if (cls.state != ca_dedicated)
 278                 mod->texturepool = R_AllocTexturePool();
 279
 280         // call the apropriate loader
 281         num = LittleLong(*((int *)buf));
 282              if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf);
 283         else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf);
 284         else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf);
 285         else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf);
 286         else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf);
 287         else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf);
 288         else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf);
 289         else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf);
 290         else Host_Error("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 291
 292         Mem_Free(buf);
 293
 294         // no errors occurred
 295         mod->needload = false;
 296         return mod;
 297 }
 298
 299 void Mod_CheckLoaded(model_t *mod)
 300 {
 301         if (mod)
 302         {
 303                 if (mod->needload)
 304                         Mod_LoadModel(mod, true, true, mod->isworldmodel);
 305                 else
 306                 {
 307                         if (mod->type == mod_invalid)
 308                                 Host_Error("Mod_CheckLoaded: invalid model\n");
 309                         mod->used = true;
 310                         return;
 311                 }
 312         }
 313 }
 314
 315 /*
 316 ===================
 317 Mod_ClearAll
 318 ===================
 319 */
 320 void Mod_ClearAll(void)
 321 {
 322 }
 323
 324 void Mod_ClearUsed(void)
 325 {
 326         int i;
 327         model_t *mod;
 328
 329         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 330                 if (mod->name[0])
 331                         mod->used = false;
 332 }
 333
 334 void Mod_PurgeUnused(void)
 335 {
 336         int i;
 337         model_t *mod;
 338
 339         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 340                 if (mod->name[0])
 341                         if (!mod->used)
 342                                 Mod_FreeModel(mod);
 343 }
 344
 345 void Mod_LoadModels(void)
 346 {
 347         int i;
 348         model_t *mod;
 349
 350         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 351                 if (mod->name[0])
 352                         if (mod->used)
 353                                 Mod_CheckLoaded(mod);
 354 }
 355
 356 /*
 357 ==================
 358 Mod_FindName
 359
 360 ==================
 361 */
 362 model_t *Mod_FindName(const char *name)
 363 {
 364         int i;
 365         model_t *mod, *freemod;
 366
 367         if (!name[0])
 368                 Host_Error ("Mod_ForName: NULL name");
 369
 370 // search the currently loaded models
 371         freemod = NULL;
 372         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 373         {
 374                 if (mod->name[0])
 375                 {
 376                         if (!strcmp (mod->name, name))
 377                         {
 378                                 mod->used = true;
 379                                 return mod;
 380                         }
 381                 }
 382                 else if (freemod == NULL)
 383                         freemod = mod;
 384         }
 385
 386         if (freemod)
 387         {
 388                 mod = freemod;
 389                 strcpy (mod->name, name);
 390                 mod->needload = true;
 391                 mod->used = true;
 392                 return mod;
 393         }
 394
 395         Host_Error ("Mod_FindName: ran out of models\n");
 396         return NULL;
 397 }
 398
 399 /*
 400 ==================
 401 Mod_TouchModel
 402
 403 ==================
 404 */
 405 void Mod_TouchModel(const char *name)
 406 {
 407         model_t *mod;
 408
 409         mod = Mod_FindName(name);
 410         mod->used = true;
 411 }
 412
 413 /*
 414 ==================
 415 Mod_ForName
 416
 417 Loads in a model for the given name
 418 ==================
 419 */
 420 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 421 {
 422         return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
 423 }
 424
 425 qbyte *mod_base;
 426
 427
 428 //=============================================================================
 429
 430 /*
 431 ================
 432 Mod_Print
 433 ================
 434 */
 435 static void Mod_Print(void)
 436 {
 437         int             i;
 438         model_t *mod;
 439
 440         Con_Printf ("Loaded models:\n");
 441         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 442                 if (mod->name[0])
 443                         Con_Printf ("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 444 }
 445
 446 /*
 447 ================
 448 Mod_Precache
 449 ================
 450 */
 451 static void Mod_Precache(void)
 452 {
 453         if (Cmd_Argc() == 2)
 454                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 455         else
 456                 Con_Printf("usage: modelprecache <filename>\n");
 457 }
 458
 459 int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 460 {
 461         int i, match, count;
 462         count = 0;
 463         match = -1;
 464         for (i = 0;i < numtriangles;i++, elements += 3)
 465         {
 466                      if ((elements[0] == start && elements[1] == end)
 467                       || (elements[1] == start && elements[2] == end)
 468                       || (elements[2] == start && elements[0] == end))
 469                 {
 470                         if (i != ignore)
 471                                 match = i;
 472                         count++;
 473                 }
 474                 else if ((elements[1] == start && elements[0] == end)
 475                       || (elements[2] == start && elements[1] == end)
 476                       || (elements[0] == start && elements[2] == end))
 477                         count++;
 478         }
 479         // detect edges shared by three triangles and make them seams
 480         if (count > 2)
 481                 match = -1;
 482         return match;
 483 }
 484
 485 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 486 {
 487         int i, *n;
 488         const int *e;
 489         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 490         {
 491                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 492                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 493                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 494         }
 495 }
 496
 497 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 498 {
 499         int i;
 500         for (i = 0;i < numtriangles * 3;i++)
 501                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 502                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 503 }
 504
 505 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)
 506 {
 507         float f;
 508         normal3f[0] = (v1[1] - v0[1]) * (v2[2] - v0[2]) - (v1[2] - v0[2]) * (v2[1] - v0[1]);
 509         normal3f[1] = (v1[2] - v0[2]) * (v2[0] - v0[0]) - (v1[0] - v0[0]) * (v2[2] - v0[2]);
 510         normal3f[2] = (v1[0] - v0[0]) * (v2[1] - v0[1]) - (v1[1] - v0[1]) * (v2[0] - v0[0]);
 511         VectorNormalize(normal3f);
 512         tvector3f[0] = ((tc1[0] - tc0[0]) * (v2[0] - v0[0]) - (tc2[0] - tc0[0]) * (v1[0] - v0[0]));
 513         tvector3f[1] = ((tc1[0] - tc0[0]) * (v2[1] - v0[1]) - (tc2[0] - tc0[0]) * (v1[1] - v0[1]));
 514         tvector3f[2] = ((tc1[0] - tc0[0]) * (v2[2] - v0[2]) - (tc2[0] - tc0[0]) * (v1[2] - v0[2]));
 515         f = -DotProduct(tvector3f, normal3f);
 516         VectorMA(tvector3f, f, normal3f, tvector3f);
 517         VectorNormalize(tvector3f);
 518         CrossProduct(normal3f, tvector3f, svector3f);
 519 }
 520
 521 // warning: this is an expensive function!
 522 void Mod_BuildTextureVectorsAndNormals(int numverts, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f)
 523 {
 524         int i, tnum;
 525         float sdir[3], tdir[3], normal[3], *v;
 526         const int *e;
 527         // clear the vectors
 528         if (svector3f)
 529                 memset(svector3f, 0, numverts * sizeof(float[3]));
 530         if (tvector3f)
 531                 memset(tvector3f, 0, numverts * sizeof(float[3]));
 532         if (normal3f)
 533                 memset(normal3f, 0, numverts * sizeof(float[3]));
 534         // process each vertex of each triangle and accumulate the results
 535         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 536         {
 537                 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);
 538                 if (svector3f)
 539                 {
 540                         for (i = 0;i < 3;i++)
 541                         {
 542                                 svector3f[e[i]*3  ] += sdir[0];
 543                                 svector3f[e[i]*3+1] += sdir[1];
 544                                 svector3f[e[i]*3+2] += sdir[2];
 545                         }
 546                 }
 547                 if (tvector3f)
 548                 {
 549                         for (i = 0;i < 3;i++)
 550                         {
 551                                 tvector3f[e[i]*3  ] += tdir[0];
 552                                 tvector3f[e[i]*3+1] += tdir[1];
 553                                 tvector3f[e[i]*3+2] += tdir[2];
 554                         }
 555                 }
 556                 if (normal3f)
 557                 {
 558                         for (i = 0;i < 3;i++)
 559                         {
 560                                 normal3f[e[i]*3  ] += normal[0];
 561                                 normal3f[e[i]*3+1] += normal[1];
 562                                 normal3f[e[i]*3+2] += normal[2];
 563                         }
 564                 }
 565         }
 566         // now we could divide the vectors by the number of averaged values on
 567         // each vertex...  but instead normalize them
 568         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 569         if (svector3f)
 570                 for (i = 0, v = svector3f;i < numverts;i++, v += 3)
 571                         VectorNormalize(v);
 572         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 573         if (tvector3f)
 574                 for (i = 0, v = tvector3f;i < numverts;i++, v += 3)
 575                         VectorNormalize(v);
 576         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 577         if (normal3f)
 578                 for (i = 0, v = normal3f;i < numverts;i++, v += 3)
 579                         VectorNormalize(v);
 580 }
 581
 582 shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts)
 583 {
 584         shadowmesh_t *mesh;
 585         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));
 586         mesh->maxverts = maxverts;
 587         mesh->maxtriangles = maxverts;
 588         mesh->numverts = 0;
 589         mesh->numtriangles = 0;
 590         mesh->vertex3f = (float *)(mesh + 1);
 591         mesh->element3i = (int *)(mesh->vertex3f + mesh->maxverts * 3);
 592         mesh->neighbor3i = (int *)(mesh->element3i + mesh->maxtriangles * 3);
 593         mesh->vertexhashtable = (shadowmeshvertexhash_t **)(mesh->neighbor3i + mesh->maxtriangles * 3);
 594         mesh->vertexhashentries = (shadowmeshvertexhash_t *)(mesh->vertexhashtable + SHADOWMESHVERTEXHASH);
 595         return mesh;
 596 }
 597
 598 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh)
 599 {
 600         shadowmesh_t *newmesh;
 601         newmesh = Mem_Alloc(mempool, sizeof(shadowmesh_t) + oldmesh->numverts * sizeof(float[3]) + oldmesh->numtriangles * sizeof(int[3]) + oldmesh->numtriangles * sizeof(int[3]));
 602         newmesh->maxverts = newmesh->numverts = oldmesh->numverts;
 603         newmesh->maxtriangles = newmesh->numtriangles = oldmesh->numtriangles;
 604         newmesh->vertex3f = (float *)(newmesh + 1);
 605         newmesh->element3i = (int *)(newmesh->vertex3f + newmesh->maxverts * 3);
 606         newmesh->neighbor3i = (int *)(newmesh->element3i + newmesh->maxtriangles * 3);
 607         memcpy(newmesh->vertex3f, oldmesh->vertex3f, newmesh->numverts * sizeof(float[3]));
 608         memcpy(newmesh->element3i, oldmesh->element3i, newmesh->numtriangles * sizeof(int[3]));
 609         memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, newmesh->numtriangles * sizeof(int[3]));
 610         return newmesh;
 611 }
 612
 613 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *v)
 614 {
 615         int hashindex;
 616         float *m;
 617         shadowmeshvertexhash_t *hash;
 618         // this uses prime numbers intentionally
 619         hashindex = (int) (v[0] * 3 + v[1] * 5 + v[2] * 7) % SHADOWMESHVERTEXHASH;
 620         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 621         {
 622                 m = mesh->vertex3f + (hash - mesh->vertexhashentries) * 3;
 623                 if (m[0] == v[0] && m[1] == v[1] &&  m[2] == v[2])
 624                         return hash - mesh->vertexhashentries;
 625         }
 626         hash = mesh->vertexhashentries + mesh->numverts;
 627         hash->next = mesh->vertexhashtable[hashindex];
 628         mesh->vertexhashtable[hashindex] = hash;
 629         m = mesh->vertex3f + (hash - mesh->vertexhashentries) * 3;
 630         VectorCopy(v, m);
 631         mesh->numverts++;
 632         return mesh->numverts - 1;
 633 }
 634
 635 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, float *vert0, float *vert1, float *vert2)
 636 {
 637         while (mesh->numverts + 3 > mesh->maxverts || mesh->numtriangles + 1 > mesh->maxtriangles)
 638         {
 639                 if (mesh->next == NULL)
 640                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxtriangles, 1));
 641                 mesh = mesh->next;
 642         }
 643         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vert0);
 644         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vert1);
 645         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vert2);
 646         mesh->numtriangles++;
 647 }
 648
 649 void Mod_ShadowMesh_AddPolygon(mempool_t *mempool, shadowmesh_t *mesh, int numverts, float *verts)
 650 {
 651         int i;
 652         float *v;
 653         for (i = 0, v = verts + 3;i < numverts - 2;i++, v += 3)
 654                 Mod_ShadowMesh_AddTriangle(mempool, mesh, verts, v, v + 3);
 655         /*
 656         int i, i1, i2, i3;
 657         float *v;
 658         while (mesh->numverts + numverts > mesh->maxverts || mesh->numtriangles + (numverts - 2) > mesh->maxtriangles)
 659         {
 660                 if (mesh->next == NULL)
 661                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxtriangles, numverts));
 662                 mesh = mesh->next;
 663         }
 664         i1 = Mod_ShadowMesh_AddVertex(mesh, verts);
 665         i2 = 0;
 666         i3 = Mod_ShadowMesh_AddVertex(mesh, verts + 3);
 667         for (i = 0, v = verts + 6;i < numverts - 2;i++, v += 3)
 668         {
 669                 i2 = i3;
 670                 i3 = Mod_ShadowMesh_AddVertex(mesh, v);
 671                 mesh->elements[mesh->numtriangles * 3 + 0] = i1;
 672                 mesh->elements[mesh->numtriangles * 3 + 1] = i2;
 673                 mesh->elements[mesh->numtriangles * 3 + 2] = i3;
 674                 mesh->numtriangles++;
 675         }
 676         */
 677 }
 678
 679 void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, float *verts, int numtris, int *elements)
 680 {
 681         int i;
 682         for (i = 0;i < numtris;i++, elements += 3)
 683                 Mod_ShadowMesh_AddTriangle(mempool, mesh, verts + elements[0] * 3, verts + elements[1] * 3, verts + elements[2] * 3);
 684 }
 685
 686 shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int initialnumtriangles)
 687 {
 688         return Mod_ShadowMesh_Alloc(mempool, initialnumtriangles);
 689 }
 690
 691 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh)
 692 {
 693 #if 1
 694         //int i;
 695         shadowmesh_t *mesh, *newmesh, *nextmesh;
 696         // reallocate meshs to conserve space
 697         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 698         {
 699                 nextmesh = mesh->next;
 700                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 701                 {
 702                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh);
 703                         newmesh->next = firstmesh;
 704                         firstmesh = newmesh;
 705                         //Con_Printf("mesh\n");
 706                         //for (i = 0;i < newmesh->numtriangles;i++)
 707                         //      Con_Printf("tri %d %d %d\n", newmesh->elements[i * 3 + 0], newmesh->elements[i * 3 + 1], newmesh->elements[i * 3 + 2]);
 708                         Mod_ValidateElements(newmesh->element3i, newmesh->numtriangles, newmesh->numverts, __FILE__, __LINE__);
 709                         Mod_BuildTriangleNeighbors(newmesh->neighbor3i, newmesh->element3i, newmesh->numtriangles);
 710                 }
 711                 Mem_Free(mesh);
 712         }
 713 #else
 714         shadowmesh_t *mesh;
 715         for (mesh = firstmesh;mesh;mesh = mesh->next)
 716         {
 717                 Mod_ValidateElements(mesh->elements, mesh->numtriangles, mesh->numverts, __FILE__, __LINE__);
 718                 Mod_BuildTriangleNeighbors(mesh->neighbors, mesh->elements, mesh->numtriangles);
 719         }
 720 #endif
 721         return firstmesh;
 722 }
 723
 724 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 725 {
 726         int i;
 727         shadowmesh_t *mesh;
 728         vec3_t nmins, nmaxs, ncenter, temp;
 729         float nradius2, dist2, *v;
 730         // calculate bbox
 731         for (mesh = firstmesh;mesh;mesh = mesh->next)
 732         {
 733                 if (mesh == firstmesh)
 734                 {
 735                         VectorCopy(mesh->vertex3f, nmins);
 736                         VectorCopy(mesh->vertex3f, nmaxs);
 737                 }
 738                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 739                 {
 740                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 741                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 742                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 743                 }
 744         }
 745         // calculate center and radius
 746         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 747         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 748         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 749         nradius2 = 0;
 750         for (mesh = firstmesh;mesh;mesh = mesh->next)
 751         {
 752                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 753                 {
 754                         VectorSubtract(v, ncenter, temp);
 755                         dist2 = DotProduct(temp, temp);
 756                         if (nradius2 < dist2)
 757                                 nradius2 = dist2;
 758                 }
 759         }
 760         // return data
 761         if (mins)
 762                 VectorCopy(nmins, mins);
 763         if (maxs)
 764                 VectorCopy(nmaxs, maxs);
 765         if (center)
 766                 VectorCopy(ncenter, center);
 767         if (radius)
 768                 *radius = sqrt(nradius2);
 769 }
 770
 771 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 772 {
 773         shadowmesh_t *nextmesh;
 774         for (;mesh;mesh = nextmesh)
 775         {
 776                 nextmesh = mesh->next;
 777                 Mem_Free(mesh);
 778         }
 779 }
 780
 781 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 782 {
 783         int i;
 784         for (i = 0;i < width*height;i++)
 785                 if (((qbyte *)&palette[in[i]])[3] > 0)
 786                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 787         return NULL;
 788 }
 789
 790 static int detailtexturecycle = 0;
 791 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
 792 {
 793         imageskin_t s;
 794         memset(skinframe, 0, sizeof(*skinframe));
 795         if (!image_loadskin(&s, basename))
 796                 return false;
 797         if (usedetailtexture)
 798                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 799         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 800         if (s.nmappixels != NULL)
 801                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 802         if (s.glosspixels != NULL)
 803                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 804         if (s.glowpixels != NULL && loadglowtexture)
 805                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 806         if (s.maskpixels != NULL)
 807                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 808         if (loadpantsandshirt)
 809         {
 810                 if (s.pantspixels != NULL)
 811                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 812                 if (s.shirtpixels != NULL)
 813                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 814         }
 815         image_freeskin(&s);
 816         return true;
 817 }
 818
 819 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
 820 {
 821         qbyte *temp1, *temp2;
 822         memset(skinframe, 0, sizeof(*skinframe));
 823         if (!skindata)
 824                 return false;
 825         if (usedetailtexture)
 826                 skinframe->detail = mod_shared_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 827         if (r_shadow_bumpscale_basetexture.value > 0)
 828         {
 829                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
 830                 temp2 = temp1 + width * height * 4;
 831                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
 832                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
 833                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
 834                 Mem_Free(temp1);
 835         }
 836         if (loadglowtexture)
 837         {
 838                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
 839                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
 840                 if (loadpantsandshirt)
 841                 {
 842                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 843                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 844                         if (skinframe->pants || skinframe->shirt)
 845                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormapnofullbrights, textureflags); // no special colors
 846                 }
 847         }
 848         else
 849         {
 850                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
 851                 if (loadpantsandshirt)
 852                 {
 853                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 854                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 855                         if (skinframe->pants || skinframe->shirt)
 856                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
 857                 }
 858         }
 859         return true;
 860 }
 861
 862 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
 863 {
 864         float v[3], tc[3];
 865         v[0] = ix;
 866         v[1] = iy;
 867         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
 868                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
 869         else
 870                 v[2] = 0;
 871         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
 872         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
 873         texcoord2f[0] = tc[0];
 874         texcoord2f[1] = tc[1];
 875 }
 876
 877 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)
 878 {
 879         float vup[3], vdown[3], vleft[3], vright[3];
 880         float tcup[3], tcdown[3], tcleft[3], tcright[3];
 881         float sv[3], tv[3], nl[3];
 882         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
 883         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
 884         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
 885         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
 886         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
 887         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
 888         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
 889         VectorAdd(svector3f, sv, svector3f);
 890         VectorAdd(tvector3f, tv, tvector3f);
 891         VectorAdd(normal3f, nl, normal3f);
 892         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
 893         VectorAdd(svector3f, sv, svector3f);
 894         VectorAdd(tvector3f, tv, tvector3f);
 895         VectorAdd(normal3f, nl, normal3f);
 896         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
 897         VectorAdd(svector3f, sv, svector3f);
 898         VectorAdd(tvector3f, tv, tvector3f);
 899         VectorAdd(normal3f, nl, normal3f);
 900 }
 901
 902 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)
 903 {
 904         int x, y, ix, iy, *e;
 905         e = element3i;
 906         for (y = 0;y < height;y++)
 907         {
 908                 for (x = 0;x < width;x++)
 909                 {
 910                         e[0] = (y + 1) * (width + 1) + (x + 0);
 911                         e[1] = (y + 0) * (width + 1) + (x + 0);
 912                         e[2] = (y + 1) * (width + 1) + (x + 1);
 913                         e[3] = (y + 0) * (width + 1) + (x + 0);
 914                         e[4] = (y + 0) * (width + 1) + (x + 1);
 915                         e[5] = (y + 1) * (width + 1) + (x + 1);
 916                         e += 6;
 917                 }
 918         }
 919         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
 920         for (y = 0, iy = y1;y < height + 1;y++, iy++)
 921                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
 922                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
 923 }
 924
 925 skinfile_t *Mod_LoadSkinFiles(void)
 926 {
 927         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
 928         char *text;
 929         const char *data;
 930         skinfile_t *skinfile, *first = NULL;
 931         skinfileitem_t *skinfileitem;
 932         char word[10][MAX_QPATH];
 933         overridetagnameset_t tagsets[MAX_SKINS];
 934         overridetagname_t tags[256];
 935
 936 /*
 937 sample file:
 938 U_bodyBox,models/players/Legoman/BikerA2.tga
 939 U_RArm,models/players/Legoman/BikerA1.tga
 940 U_LArm,models/players/Legoman/BikerA1.tga
 941 U_armor,common/nodraw
 942 U_sword,common/nodraw
 943 U_shield,common/nodraw
 944 U_homb,common/nodraw
 945 U_backpack,common/nodraw
 946 U_colcha,common/nodraw
 947 tag_head,
 948 tag_weapon,
 949 tag_torso,
 950 */
 951         memset(tagsets, 0, sizeof(tagsets));
 952         memset(word, 0, sizeof(word));
 953         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), true));i++)
 954         {
 955                 numtags = 0;
 956                 skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
 957                 skinfile->next = first;
 958                 first = skinfile;
 959                 for(line = 0;;line++)
 960                 {
 961                         // parse line
 962                         if (!COM_ParseToken(&data, true))
 963                                 break;
 964                         if (!strcmp(com_token, "\n"))
 965                                 continue;
 966                         words = 0;
 967                         wordsoverflow = false;
 968                         do
 969                         {
 970                                 if (words < 10)
 971                                         strncpy(word[words++], com_token, MAX_QPATH - 1);
 972                                 else
 973                                         wordsoverflow = true;
 974                         }
 975                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
 976                         if (wordsoverflow)
 977                         {
 978                                 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);
 979                                 continue;
 980                         }
 981                         // words is always >= 1
 982                         if (!strcmp(word[0], "replace"))
 983                         {
 984                                 if (words == 3)
 985                                 {
 986                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
 987                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
 988                                         skinfileitem->next = skinfile->items;
 989                                         skinfile->items = skinfileitem;
 990                                         strncpy(skinfileitem->name, word[1], sizeof(skinfileitem->name) - 1);
 991                                         strncpy(skinfileitem->replacement, word[2], sizeof(skinfileitem->replacement) - 1);
 992                                 }
 993                                 else
 994                                         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]);
 995                         }
 996                         else if (words == 2 && !strcmp(word[1], ","))
 997                         {
 998                                 // tag name, like "tag_weapon,"
 999                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1000                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1001                                 strncpy(tags[numtags].name, word[0], sizeof(tags[numtags].name) - 1);
1002                                 numtags++;
1003                         }
1004                         else if (words == 3 && !strcmp(word[1], ","))
1005                         {
1006                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1007                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1008                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1009                                 skinfileitem->next = skinfile->items;
1010                                 skinfile->items = skinfileitem;
1011                                 strncpy(skinfileitem->name, word[0], sizeof(skinfileitem->name) - 1);
1012                                 strncpy(skinfileitem->replacement, word[2], sizeof(skinfileitem->replacement) - 1);
1013                         }
1014                         else
1015                                 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);
1016                 }
1017                 Mem_Free(text);
1018
1019                 if (numtags)
1020                 {
1021                         overridetagnameset_t *t;
1022                         t = tagsets + i;
1023                         t->num_overridetagnames = numtags;
1024                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1025                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1026                         tagsetsused = true;
1027                 }
1028         }
1029         if (tagsetsused)
1030         {
1031                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1032                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1033         }
1034         if (i)
1035                 loadmodel->numskins = i;
1036         return first;
1037 }
1038
1039 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1040 {
1041         skinfile_t *next;
1042         skinfileitem_t *skinfileitem, *nextitem;
1043         for (;skinfile;skinfile = next)
1044         {
1045                 next = skinfile->next;
1046                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1047                 {
1048                         nextitem = skinfileitem->next;
1049                         Mem_Free(skinfileitem);
1050                 }
1051                 Mem_Free(skinfile);
1052         }
1053 }
1054
1055 int Mod_CountSkinFiles(skinfile_t *skinfile)
1056 {
1057         int i;
1058         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1059         return i;
1060 }
1061
1062 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1063 {
1064         int i, outtriangles;
1065         float d, edgedir[3], temp[3];
1066         // a degenerate triangle is one with no width (thickness, surface area)
1067         // these are characterized by having all 3 points colinear (along a line)
1068         // or having two points identical
1069         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1070         {
1071                 // calculate first edge
1072                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1073                 if (VectorLength2(edgedir) < 0.0001f)
1074                         continue; // degenerate first edge (no length)
1075                 VectorNormalize(edgedir);
1076                 // check if third point is on the edge (colinear)
1077                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1078                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1079                 if (VectorLength2(temp) < 0.0001f)
1080                         continue; // third point colinear with first edge
1081                 // valid triangle (no colinear points, no duplicate points)
1082                 VectorCopy(inelement3i, outelement3i);
1083                 outelement3i += 3;
1084                 outtriangles++;
1085         }
1086         return outtriangles;
1087 }
1088