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", "mipmaps skins (so they become blurrier in the distance), disabled by default because it tends to blur with strange border colors from the skin"};
  30
  31 model_t *loadmodel;
  32
  33 #if 0
  34 // LordHavoc: was 512
  35 static int mod_numknown = 0;
  36 static int mod_maxknown = 0;
  37 static model_t *mod_known = NULL;
  38 #else
  39 // LordHavoc: was 512
  40 #define MAX_MOD_KNOWN (MAX_MODELS + 256)
  41 static int mod_numknown = 0;
  42 static int mod_maxknown = MAX_MOD_KNOWN;
  43 static model_t mod_known[MAX_MOD_KNOWN];
  44 #endif
  45
  46 static void mod_start(void)
  47 {
  48         int i;
  49         model_t *mod;
  50
  51         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
  52                 if (mod->name[0])
  53                         if (mod->used)
  54                                 Mod_LoadModel(mod, true, false, mod->isworldmodel);
  55 }
  56
  57 static void mod_shutdown(void)
  58 {
  59         int i;
  60         model_t *mod;
  61
  62         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
  63                 if (mod->loaded)
  64                         Mod_UnloadModel(mod);
  65 }
  66
  67 static void mod_newmap(void)
  68 {
  69         msurface_t *surface;
  70         int i, surfacenum, ssize, tsize;
  71
  72         if (!cl_stainmaps_clearonload.integer)
  73                 return;
  74
  75         for (i = 0;i < mod_numknown;i++)
  76         {
  77                 if (mod_known[i].mempool && mod_known[i].data_surfaces)
  78                 {
  79                         for (surfacenum = 0, surface = mod_known[i].data_surfaces;surfacenum < mod_known[i].num_surfaces;surfacenum++, surface++)
  80                         {
  81                                 if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
  82                                 {
  83                                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
  84                                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
  85                                         memset(surface->lightmapinfo->stainsamples, 255, ssize * tsize * 3);
  86                                         surface->cached_dlight = true;
  87                                 }
  88                         }
  89                 }
  90         }
  91 }
  92
  93 /*
  94 ===============
  95 Mod_Init
  96 ===============
  97 */
  98 static void Mod_Print(void);
  99 static void Mod_Precache (void);
 100 void Mod_Init (void)
 101 {
 102         Mod_BrushInit();
 103         Mod_AliasInit();
 104         Mod_SpriteInit();
 105
 106         Cvar_RegisterVariable(&r_mipskins);
 107         Cmd_AddCommand ("modellist", Mod_Print, "prints a list of loaded models");
 108         Cmd_AddCommand ("modelprecache", Mod_Precache, "load a model");
 109 }
 110
 111 void Mod_RenderInit(void)
 112 {
 113         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 114 }
 115
 116 void Mod_UnloadModel (model_t *mod)
 117 {
 118         char name[MAX_QPATH];
 119         qboolean isworldmodel;
 120         qboolean used;
 121         strcpy(name, mod->name);
 122         isworldmodel = mod->isworldmodel;
 123         used = mod->used;
 124         // free textures/memory attached to the model
 125         R_FreeTexturePool(&mod->texturepool);
 126         Mem_FreePool(&mod->mempool);
 127         // clear the struct to make it available
 128         memset(mod, 0, sizeof(model_t));
 129         // restore the fields we want to preserve
 130         strcpy(mod->name, name);
 131         mod->isworldmodel = isworldmodel;
 132         mod->used = used;
 133         mod->loaded = false;
 134 }
 135
 136 /*
 137 ==================
 138 Mod_LoadModel
 139
 140 Loads a model
 141 ==================
 142 */
 143 model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 144 {
 145         int num;
 146         unsigned int crc;
 147         void *buf;
 148         fs_offset_t filesize;
 149
 150         mod->used = true;
 151
 152         if (mod->name[0] == '*') // submodel
 153                 return mod;
 154
 155         crc = 0;
 156         buf = NULL;
 157         if (mod->isworldmodel != isworldmodel)
 158                 mod->loaded = false;
 159         if (!mod->loaded || checkdisk)
 160         {
 161                 if (checkdisk && mod->loaded)
 162                         Con_DPrintf("checking model %s\n", mod->name);
 163                 buf = FS_LoadFile (mod->name, tempmempool, false, &filesize);
 164                 if (buf)
 165                 {
 166                         crc = CRC_Block((unsigned char *)buf, filesize);
 167                         if (mod->crc != crc)
 168                                 mod->loaded = false;
 169                 }
 170         }
 171         if (mod->loaded)
 172         {
 173                 // already loaded
 174                 if (buf)
 175                         Mem_Free(buf);
 176                 return mod;
 177         }
 178
 179         Con_DPrintf("loading model %s\n", mod->name);
 180         // LordHavoc: unload the existing model in this slot (if there is one)
 181         if (mod->loaded)
 182                 Mod_UnloadModel(mod);
 183
 184         // load the model
 185         mod->isworldmodel = isworldmodel;
 186         mod->used = true;
 187         mod->crc = crc;
 188         // errors can prevent the corresponding mod->loaded = true;
 189         mod->loaded = false;
 190
 191         // default model radius and bounding box (mainly for missing models)
 192         mod->radius = 16;
 193         VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
 194         VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
 195         VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
 196         VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
 197         VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
 198         VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 199
 200         // all models use memory, so allocate a memory pool
 201         mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 202         // all models load textures, so allocate a texture pool
 203         if (cls.state != ca_dedicated)
 204                 mod->texturepool = R_AllocTexturePool();
 205
 206         if (buf)
 207         {
 208                 char *bufend = (char *)buf + filesize;
 209                 num = LittleLong(*((int *)buf));
 210                 // call the apropriate loader
 211                 loadmodel = mod;
 212                      if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf, bufend);
 213                 else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf, bufend);
 214                 else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf, bufend);
 215                 else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf, bufend);
 216                 else if (!memcmp(buf, "IDS2", 4)) Mod_IDS2_Load(mod, buf, bufend);
 217                 else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf, bufend);
 218                 else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf, bufend);
 219                 else if (!memcmp(buf, "DARKPLACESMODEL", 16)) Mod_DARKPLACESMODEL_Load(mod, buf, bufend);
 220                 else if (!memcmp(buf, "ACTRHEAD", 8)) Mod_PSKMODEL_Load(mod, buf, bufend);
 221                 else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf, bufend);
 222                 else if (!memcmp(buf, "MCBSPpad", 8)) Mod_Q1BSP_Load(mod, buf, bufend);
 223                 else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf, bufend);
 224                 else Con_Printf("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 225                 Mem_Free(buf);
 226         }
 227         else if (crash)
 228         {
 229                 // LordHavoc: Sys_Error was *ANNOYING*
 230                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 231         }
 232
 233         // no errors occurred
 234         mod->loaded = true;
 235         return mod;
 236 }
 237
 238 void Mod_ClearUsed(void)
 239 {
 240 #if 0
 241         int i;
 242         model_t *mod;
 243
 244         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 245                 if (mod->name[0])
 246                         mod->used = false;
 247 #endif
 248 }
 249
 250 void Mod_PurgeUnused(void)
 251 {
 252         int i;
 253         model_t *mod;
 254
 255         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 256                 if (mod->name[0])
 257                         if (!mod->used)
 258                                 Mod_UnloadModel(mod);
 259 }
 260
 261 // only used during loading!
 262 void Mod_RemoveStaleWorldModels(model_t *skip)
 263 {
 264         int i;
 265         model_t *mod;
 266
 267         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 268         {
 269                 if (mod->isworldmodel && mod->loaded && skip != mod)
 270                 {
 271                         Mod_UnloadModel(mod);
 272                         mod->isworldmodel = false;
 273                         mod->used = false;
 274                 }
 275         }
 276 }
 277
 278 /*
 279 ==================
 280 Mod_FindName
 281
 282 ==================
 283 */
 284 model_t *Mod_FindName(const char *name)
 285 {
 286         int i;
 287         model_t *mod;
 288
 289         if (!name[0])
 290                 Host_Error ("Mod_ForName: NULL name");
 291
 292 // search the currently loaded models
 293         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 294         {
 295                 if (mod->name[0] && !strcmp(mod->name, name))
 296                 {
 297                         mod->used = true;
 298                         return mod;
 299                 }
 300         }
 301
 302         // no match found, find room for a new one
 303         for (i = 0;i < mod_numknown;i++)
 304                 if (!mod_known[i].name[0])
 305                         break;
 306
 307         if (mod_maxknown == i)
 308         {
 309 #if 0
 310                 model_t *old;
 311                 mod_maxknown += 256;
 312                 old = mod_known;
 313                 mod_known = Mem_Alloc(mod_mempool, mod_maxknown * sizeof(model_t));
 314                 if (old)
 315                 {
 316                         memcpy(mod_known, old, mod_numknown * sizeof(model_t));
 317                         Mem_Free(old);
 318                 }
 319 #else
 320                 Host_Error ("Mod_FindName: ran out of models");
 321 #endif
 322         }
 323         if (mod_numknown == i)
 324                 mod_numknown++;
 325         mod = mod_known + i;
 326         strcpy (mod->name, name);
 327         mod->loaded = false;
 328         mod->used = true;
 329         return mod;
 330 }
 331
 332 /*
 333 ==================
 334 Mod_ForName
 335
 336 Loads in a model for the given name
 337 ==================
 338 */
 339 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 340 {
 341         model_t *model;
 342         model = Mod_FindName(name);
 343         if (model->name[0] != '*' && (!model->loaded || checkdisk))
 344                 Mod_LoadModel(model, crash, checkdisk, isworldmodel);
 345         return model;
 346 }
 347
 348 unsigned char *mod_base;
 349
 350
 351 //=============================================================================
 352
 353 /*
 354 ================
 355 Mod_Print
 356 ================
 357 */
 358 static void Mod_Print(void)
 359 {
 360         int             i;
 361         model_t *mod;
 362
 363         Con_Print("Loaded models:\n");
 364         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 365                 if (mod->name[0])
 366                         Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 367 }
 368
 369 /*
 370 ================
 371 Mod_Precache
 372 ================
 373 */
 374 static void Mod_Precache(void)
 375 {
 376         if (Cmd_Argc() == 2)
 377                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 378         else
 379                 Con_Print("usage: modelprecache <filename>\n");
 380 }
 381
 382 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 383 {
 384         int i, count;
 385         unsigned char *used;
 386         used = (unsigned char *)Mem_Alloc(tempmempool, numvertices);
 387         memset(used, 0, numvertices);
 388         for (i = 0;i < numelements;i++)
 389                 used[elements[i]] = 1;
 390         for (i = 0, count = 0;i < numvertices;i++)
 391                 remapvertices[i] = used[i] ? count++ : -1;
 392         Mem_Free(used);
 393         return count;
 394 }
 395
 396 #if 1
 397 // fast way, using an edge hash
 398 #define TRIANGLEEDGEHASH 8192
 399 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 400 {
 401         int i, j, p, e1, e2, *n, hashindex, count, match;
 402         const int *e;
 403         typedef struct edgehashentry_s
 404         {
 405                 struct edgehashentry_s *next;
 406                 int triangle;
 407                 int element[2];
 408         }
 409         edgehashentry_t;
 410         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 411         memset(edgehash, 0, sizeof(edgehash));
 412         edgehashentries = edgehashentriesbuffer;
 413         // if there are too many triangles for the stack array, allocate larger buffer
 414         if (numtriangles > TRIANGLEEDGEHASH)
 415                 edgehashentries = (edgehashentry_t *)Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 416         // find neighboring triangles
 417         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 418         {
 419                 for (j = 0, p = 2;j < 3;p = j, j++)
 420                 {
 421                         e1 = e[p];
 422                         e2 = e[j];
 423                         // this hash index works for both forward and backward edges
 424                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 425                         hash = edgehashentries + i * 3 + j;
 426                         hash->next = edgehash[hashindex];
 427                         edgehash[hashindex] = hash;
 428                         hash->triangle = i;
 429                         hash->element[0] = e1;
 430                         hash->element[1] = e2;
 431                 }
 432         }
 433         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 434         {
 435                 for (j = 0, p = 2;j < 3;p = j, j++)
 436                 {
 437                         e1 = e[p];
 438                         e2 = e[j];
 439                         // this hash index works for both forward and backward edges
 440                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 441                         count = 0;
 442                         match = -1;
 443                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 444                         {
 445                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 446                                 {
 447                                         if (hash->triangle != i)
 448                                                 match = hash->triangle;
 449                                         count++;
 450                                 }
 451                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 452                                         count++;
 453                         }
 454                         // detect edges shared by three triangles and make them seams
 455                         if (count > 2)
 456                                 match = -1;
 457                         n[p] = match;
 458                 }
 459         }
 460         // free the allocated buffer
 461         if (edgehashentries != edgehashentriesbuffer)
 462                 Mem_Free(edgehashentries);
 463 }
 464 #else
 465 // very slow but simple way
 466 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 467 {
 468         int i, match, count;
 469         count = 0;
 470         match = -1;
 471         for (i = 0;i < numtriangles;i++, elements += 3)
 472         {
 473                      if ((elements[0] == start && elements[1] == end)
 474                       || (elements[1] == start && elements[2] == end)
 475                       || (elements[2] == start && elements[0] == end))
 476                 {
 477                         if (i != ignore)
 478                                 match = i;
 479                         count++;
 480                 }
 481                 else if ((elements[1] == start && elements[0] == end)
 482                       || (elements[2] == start && elements[1] == end)
 483                       || (elements[0] == start && elements[2] == end))
 484                         count++;
 485         }
 486         // detect edges shared by three triangles and make them seams
 487         if (count > 2)
 488                 match = -1;
 489         return match;
 490 }
 491
 492 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 493 {
 494         int i, *n;
 495         const int *e;
 496         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 497         {
 498                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 499                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 500                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 501         }
 502 }
 503 #endif
 504
 505 void Mod_ValidateElements(int *elements, int numtriangles, int firstvertex, int numverts, const char *filename, int fileline)
 506 {
 507         int i, warned = false, endvertex = firstvertex + numverts;
 508         for (i = 0;i < numtriangles * 3;i++)
 509         {
 510                 if (elements[i] < firstvertex || elements[i] >= endvertex)
 511                 {
 512                         if (!warned)
 513                         {
 514                                 warned = true;
 515                                 Con_Printf("Mod_ValidateElements: out of bounds elements detected at %s:%d\n", filename, fileline);
 516                         }
 517                         elements[i] = firstvertex;
 518                 }
 519         }
 520 }
 521
 522 // warning: this is an expensive function!
 523 void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting)
 524 {
 525         int i, j;
 526         const int *element;
 527         float *vectorNormal;
 528         float areaNormal[3];
 529         // clear the vectors
 530         memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 531         // process each vertex of each triangle and accumulate the results
 532         // use area-averaging, to make triangles with a big area have a bigger
 533         // weighting on the vertex normal than triangles with a small area
 534         // to do so, just add the 'normals' together (the bigger the area
 535         // the greater the length of the normal is
 536         element = elements;
 537         for (i = 0; i < numtriangles; i++, element += 3)
 538         {
 539                 TriangleNormal(
 540                         vertex3f + element[0] * 3,
 541                         vertex3f + element[1] * 3,
 542                         vertex3f + element[2] * 3,
 543                         areaNormal
 544                         );
 545
 546                 if (!areaweighting)
 547                         VectorNormalize(areaNormal);
 548
 549                 for (j = 0;j < 3;j++)
 550                 {
 551                         vectorNormal = normal3f + element[j] * 3;
 552                         vectorNormal[0] += areaNormal[0];
 553                         vectorNormal[1] += areaNormal[1];
 554                         vectorNormal[2] += areaNormal[2];
 555                 }
 556         }
 557         // and just normalize the accumulated vertex normal in the end
 558         vectorNormal = normal3f + 3 * firstvertex;
 559         for (i = 0; i < numvertices; i++, vectorNormal += 3)
 560                 VectorNormalize(vectorNormal);
 561 }
 562
 563 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)
 564 {
 565         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 566         // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 567         // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 568
 569         // 6 multiply, 9 subtract
 570         VectorSubtract(v1, v0, v10);
 571         VectorSubtract(v2, v0, v20);
 572         normal3f[0] = v20[1] * v10[2] - v20[2] * v10[1];
 573         normal3f[1] = v20[2] * v10[0] - v20[0] * v10[2];
 574         normal3f[2] = v20[0] * v10[1] - v20[1] * v10[0];
 575         // 12 multiply, 10 subtract
 576         tc10[1] = tc1[1] - tc0[1];
 577         tc20[1] = tc2[1] - tc0[1];
 578         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 579         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 580         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 581         tc10[0] = tc1[0] - tc0[0];
 582         tc20[0] = tc2[0] - tc0[0];
 583         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 584         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 585         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 586         // 12 multiply, 4 add, 6 subtract
 587         f = DotProduct(svector3f, normal3f);
 588         svector3f[0] -= f * normal3f[0];
 589         svector3f[1] -= f * normal3f[1];
 590         svector3f[2] -= f * normal3f[2];
 591         f = DotProduct(tvector3f, normal3f);
 592         tvector3f[0] -= f * normal3f[0];
 593         tvector3f[1] -= f * normal3f[1];
 594         tvector3f[2] -= f * normal3f[2];
 595         // if texture is mapped the wrong way (counterclockwise), the tangents
 596         // have to be flipped, this is detected by calculating a normal from the
 597         // two tangents, and seeing if it is opposite the surface normal
 598         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 599         CrossProduct(tvector3f, svector3f, tangentcross);
 600         if (DotProduct(tangentcross, normal3f) < 0)
 601         {
 602                 VectorNegate(svector3f, svector3f);
 603                 VectorNegate(tvector3f, tvector3f);
 604         }
 605 }
 606
 607 // warning: this is a very expensive function!
 608 void Mod_BuildTextureVectorsFromNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const float *texcoord2f, const float *normal3f, const int *elements, float *svector3f, float *tvector3f, qboolean areaweighting)
 609 {
 610         int i, tnum;
 611         float sdir[3], tdir[3], normal[3], *sv, *tv;
 612         const float *v0, *v1, *v2, *tc0, *tc1, *tc2, *n;
 613         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 614         const int *e;
 615         // clear the vectors
 616         memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 617         memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 618         // process each vertex of each triangle and accumulate the results
 619         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 620         {
 621                 v0 = vertex3f + e[0] * 3;
 622                 v1 = vertex3f + e[1] * 3;
 623                 v2 = vertex3f + e[2] * 3;
 624                 tc0 = texcoord2f + e[0] * 2;
 625                 tc1 = texcoord2f + e[1] * 2;
 626                 tc2 = texcoord2f + e[2] * 2;
 627
 628                 // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 629                 // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 630
 631                 // calculate the edge directions and surface normal
 632                 // 6 multiply, 9 subtract
 633                 VectorSubtract(v1, v0, v10);
 634                 VectorSubtract(v2, v0, v20);
 635                 normal[0] = v20[1] * v10[2] - v20[2] * v10[1];
 636                 normal[1] = v20[2] * v10[0] - v20[0] * v10[2];
 637                 normal[2] = v20[0] * v10[1] - v20[1] * v10[0];
 638
 639                 // calculate the tangents
 640                 // 12 multiply, 10 subtract
 641                 tc10[1] = tc1[1] - tc0[1];
 642                 tc20[1] = tc2[1] - tc0[1];
 643                 sdir[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 644                 sdir[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 645                 sdir[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 646                 tc10[0] = tc1[0] - tc0[0];
 647                 tc20[0] = tc2[0] - tc0[0];
 648                 tdir[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 649                 tdir[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 650                 tdir[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 651
 652                 // if texture is mapped the wrong way (counterclockwise), the tangents
 653                 // have to be flipped, this is detected by calculating a normal from the
 654                 // two tangents, and seeing if it is opposite the surface normal
 655                 // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 656                 CrossProduct(tdir, sdir, tangentcross);
 657                 if (DotProduct(tangentcross, normal) < 0)
 658                 {
 659                         VectorNegate(sdir, sdir);
 660                         VectorNegate(tdir, tdir);
 661                 }
 662
 663                 if (!areaweighting)
 664                 {
 665                         VectorNormalize(sdir);
 666                         VectorNormalize(tdir);
 667                 }
 668                 for (i = 0;i < 3;i++)
 669                 {
 670                         VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
 671                         VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
 672                 }
 673         }
 674         // make the tangents completely perpendicular to the surface normal, and
 675         // then normalize them
 676         // 16 assignments, 2 divide, 2 sqrt, 2 negates, 14 adds, 24 multiplies
 677         for (i = 0, sv = svector3f + 3 * firstvertex, tv = tvector3f + 3 * firstvertex, n = normal3f + 3 * firstvertex;i < numvertices;i++, sv += 3, tv += 3, n += 3)
 678         {
 679                 f = -DotProduct(sv, n);
 680                 VectorMA(sv, f, n, sv);
 681                 VectorNormalize(sv);
 682                 f = -DotProduct(tv, n);
 683                 VectorMA(tv, f, n, tv);
 684                 VectorNormalize(tv);
 685         }
 686 }
 687
 688 void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 689 {
 690         unsigned char *data;
 691         data = (unsigned char *)Mem_Alloc(mempool, numvertices * (3 + 3 + 3 + 3 + 2 + 2 + (vertexcolors ? 4 : 0)) * sizeof(float) + numvertices * (lightmapoffsets ? 1 : 0) * sizeof(int) + numtriangles * (3 + (neighbors ? 3 : 0)) * sizeof(int));
 692         loadmodel->surfmesh.num_vertices = numvertices;
 693         loadmodel->surfmesh.num_triangles = numtriangles;
 694         if (loadmodel->surfmesh.num_vertices)
 695         {
 696                 loadmodel->surfmesh.data_vertex3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 697                 loadmodel->surfmesh.data_svector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 698                 loadmodel->surfmesh.data_tvector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 699                 loadmodel->surfmesh.data_normal3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 700                 loadmodel->surfmesh.data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 701                 loadmodel->surfmesh.data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 702                 if (vertexcolors)
 703                         loadmodel->surfmesh.data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * loadmodel->surfmesh.num_vertices;
 704                 if (lightmapoffsets)
 705                         loadmodel->surfmesh.data_lightmapoffsets = (int *)data, data += sizeof(int) * loadmodel->surfmesh.num_vertices;
 706         }
 707         if (loadmodel->surfmesh.num_triangles)
 708         {
 709                 loadmodel->surfmesh.data_element3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 710                 if (neighbors)
 711                         loadmodel->surfmesh.data_neighbor3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 712         }
 713 }
 714
 715 shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable)
 716 {
 717         shadowmesh_t *newmesh;
 718         unsigned char *data;
 719         int size;
 720         size = sizeof(shadowmesh_t);
 721         size += maxverts * sizeof(float[3]);
 722         if (light)
 723                 size += maxverts * sizeof(float[11]);
 724         size += maxtriangles * sizeof(int[3]);
 725         if (neighbors)
 726                 size += maxtriangles * sizeof(int[3]);
 727         if (expandable)
 728                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 729         data = (unsigned char *)Mem_Alloc(mempool, size);
 730         newmesh = (shadowmesh_t *)data;data += sizeof(*newmesh);
 731         newmesh->map_diffuse = map_diffuse;
 732         newmesh->map_specular = map_specular;
 733         newmesh->map_normal = map_normal;
 734         newmesh->maxverts = maxverts;
 735         newmesh->maxtriangles = maxtriangles;
 736         newmesh->numverts = 0;
 737         newmesh->numtriangles = 0;
 738
 739         newmesh->vertex3f = (float *)data;data += maxverts * sizeof(float[3]);
 740         if (light)
 741         {
 742                 newmesh->svector3f = (float *)data;data += maxverts * sizeof(float[3]);
 743                 newmesh->tvector3f = (float *)data;data += maxverts * sizeof(float[3]);
 744                 newmesh->normal3f = (float *)data;data += maxverts * sizeof(float[3]);
 745                 newmesh->texcoord2f = (float *)data;data += maxverts * sizeof(float[2]);
 746         }
 747         newmesh->element3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 748         if (neighbors)
 749         {
 750                 newmesh->neighbor3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 751         }
 752         if (expandable)
 753         {
 754                 newmesh->vertexhashtable = (shadowmeshvertexhash_t **)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 755                 newmesh->vertexhashentries = (shadowmeshvertexhash_t *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 756         }
 757         return newmesh;
 758 }
 759
 760 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 761 {
 762         shadowmesh_t *newmesh;
 763         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 764         newmesh->numverts = oldmesh->numverts;
 765         newmesh->numtriangles = oldmesh->numtriangles;
 766
 767         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 768         if (newmesh->svector3f && oldmesh->svector3f)
 769         {
 770                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 771                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 772                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 773                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 774         }
 775         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 776         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 777                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 778         return newmesh;
 779 }
 780
 781 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 782 {
 783         int hashindex, vnum;
 784         shadowmeshvertexhash_t *hash;
 785         // this uses prime numbers intentionally
 786         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 787         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 788         {
 789                 vnum = (hash - mesh->vertexhashentries);
 790                 if ((mesh->vertex3f == NULL || (mesh->vertex3f[vnum * 3 + 0] == vertex14f[0] && mesh->vertex3f[vnum * 3 + 1] == vertex14f[1] && mesh->vertex3f[vnum * 3 + 2] == vertex14f[2]))
 791                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 792                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 793                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 794                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 795                         return hash - mesh->vertexhashentries;
 796         }
 797         vnum = mesh->numverts++;
 798         hash = mesh->vertexhashentries + vnum;
 799         hash->next = mesh->vertexhashtable[hashindex];
 800         mesh->vertexhashtable[hashindex] = hash;
 801         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 802         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 803         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 804         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 805         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 806         return vnum;
 807 }
 808
 809 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 810 {
 811         if (mesh->numtriangles == 0)
 812         {
 813                 // set the properties on this empty mesh to be more favorable...
 814                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 815                 mesh->map_diffuse = map_diffuse;
 816                 mesh->map_specular = map_specular;
 817                 mesh->map_normal = map_normal;
 818         }
 819         while (mesh->map_diffuse != map_diffuse || mesh->map_specular != map_specular || mesh->map_normal != map_normal || mesh->numverts + 3 > mesh->maxverts || mesh->numtriangles + 1 > mesh->maxtriangles)
 820         {
 821                 if (mesh->next == NULL)
 822                         mesh->next = Mod_ShadowMesh_Alloc(mempool, max(mesh->maxverts, 300), max(mesh->maxtriangles, 100), map_diffuse, map_specular, map_normal, mesh->svector3f != NULL, mesh->neighbor3i != NULL, true);
 823                 mesh = mesh->next;
 824         }
 825         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 826         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 827         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 828         mesh->numtriangles++;
 829 }
 830
 831 void Mod_ShadowMesh_AddMesh(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, const float *vertex3f, const float *svector3f, const float *tvector3f, const float *normal3f, const float *texcoord2f, int numtris, const int *element3i)
 832 {
 833         int i, j, e;
 834         float vbuf[3*14], *v;
 835         memset(vbuf, 0, sizeof(vbuf));
 836         for (i = 0;i < numtris;i++)
 837         {
 838                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 839                 {
 840                         e = *element3i++;
 841                         if (vertex3f)
 842                         {
 843                                 v[0] = vertex3f[e * 3 + 0];
 844                                 v[1] = vertex3f[e * 3 + 1];
 845                                 v[2] = vertex3f[e * 3 + 2];
 846                         }
 847                         if (svector3f)
 848                         {
 849                                 v[3] = svector3f[e * 3 + 0];
 850                                 v[4] = svector3f[e * 3 + 1];
 851                                 v[5] = svector3f[e * 3 + 2];
 852                         }
 853                         if (tvector3f)
 854                         {
 855                                 v[6] = tvector3f[e * 3 + 0];
 856                                 v[7] = tvector3f[e * 3 + 1];
 857                                 v[8] = tvector3f[e * 3 + 2];
 858                         }
 859                         if (normal3f)
 860                         {
 861                                 v[9] = normal3f[e * 3 + 0];
 862                                 v[10] = normal3f[e * 3 + 1];
 863                                 v[11] = normal3f[e * 3 + 2];
 864                         }
 865                         if (texcoord2f)
 866                         {
 867                                 v[12] = texcoord2f[e * 2 + 0];
 868                                 v[13] = texcoord2f[e * 2 + 1];
 869                         }
 870                 }
 871                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 872         }
 873 }
 874
 875 shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int maxverts, int maxtriangles, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, int light, int neighbors, int expandable)
 876 {
 877         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 878 }
 879
 880 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 881 {
 882         shadowmesh_t *mesh, *newmesh, *nextmesh;
 883         // reallocate meshs to conserve space
 884         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 885         {
 886                 nextmesh = mesh->next;
 887                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 888                 {
 889                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 890                         newmesh->next = firstmesh;
 891                         firstmesh = newmesh;
 892                 }
 893                 Mem_Free(mesh);
 894         }
 895         return firstmesh;
 896 }
 897
 898 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 899 {
 900         int i;
 901         shadowmesh_t *mesh;
 902         vec3_t nmins, nmaxs, ncenter, temp;
 903         float nradius2, dist2, *v;
 904         VectorClear(nmins);
 905         VectorClear(nmaxs);
 906         // calculate bbox
 907         for (mesh = firstmesh;mesh;mesh = mesh->next)
 908         {
 909                 if (mesh == firstmesh)
 910                 {
 911                         VectorCopy(mesh->vertex3f, nmins);
 912                         VectorCopy(mesh->vertex3f, nmaxs);
 913                 }
 914                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 915                 {
 916                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 917                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 918                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 919                 }
 920         }
 921         // calculate center and radius
 922         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 923         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 924         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 925         nradius2 = 0;
 926         for (mesh = firstmesh;mesh;mesh = mesh->next)
 927         {
 928                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 929                 {
 930                         VectorSubtract(v, ncenter, temp);
 931                         dist2 = DotProduct(temp, temp);
 932                         if (nradius2 < dist2)
 933                                 nradius2 = dist2;
 934                 }
 935         }
 936         // return data
 937         if (mins)
 938                 VectorCopy(nmins, mins);
 939         if (maxs)
 940                 VectorCopy(nmaxs, maxs);
 941         if (center)
 942                 VectorCopy(ncenter, center);
 943         if (radius)
 944                 *radius = sqrt(nradius2);
 945 }
 946
 947 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 948 {
 949         shadowmesh_t *nextmesh;
 950         for (;mesh;mesh = nextmesh)
 951         {
 952                 nextmesh = mesh->next;
 953                 Mem_Free(mesh);
 954         }
 955 }
 956
 957 static rtexture_t *GL_TextureForSkinLayer(const unsigned char *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 958 {
 959         int i;
 960         for (i = 0;i < width*height;i++)
 961                 if (((unsigned char *)&palette[in[i]])[3] > 0)
 962                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 963         return NULL;
 964 }
 965
 966 int Mod_LoadSkinFrame(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture)
 967 {
 968         imageskin_t s;
 969         memset(skinframe, 0, sizeof(*skinframe));
 970         if (cls.state == ca_dedicated)
 971                 return false;
 972         if (!image_loadskin(&s, basename))
 973                 return false;
 974         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 975         if (s.nmappixels != NULL)
 976                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 977         if (s.glosspixels != NULL)
 978                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 979         if (s.glowpixels != NULL && loadglowtexture)
 980                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 981         if (s.maskpixels != NULL)
 982                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 983         if (loadpantsandshirt)
 984         {
 985                 if (s.pantspixels != NULL)
 986                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 987                 if (s.shirtpixels != NULL)
 988                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 989         }
 990         if (!skinframe->base)
 991                 skinframe->base = r_texture_notexture;
 992         if (!skinframe->nmap)
 993                 skinframe->nmap = r_texture_blanknormalmap;
 994         image_freeskin(&s);
 995         return true;
 996 }
 997
 998 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture, const unsigned char *skindata, int width, int height, int bitsperpixel, const unsigned int *palette, const unsigned int *alphapalette)
 999 {
1000         int i;
1001         unsigned char *temp1, *temp2;
1002         memset(skinframe, 0, sizeof(*skinframe));
1003         if (cls.state == ca_dedicated)
1004                 return false;
1005         if (!skindata)
1006                 return false;
1007         if (bitsperpixel == 32)
1008         {
1009                 if (r_shadow_bumpscale_basetexture.value > 0)
1010                 {
1011                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1012                         temp2 = temp1 + width * height * 4;
1013                         Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1014                         skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags | TEXF_ALPHA, NULL);
1015                         Mem_Free(temp1);
1016                 }
1017                 skinframe->base = skinframe->merged = R_LoadTexture2D(loadmodel->texturepool, basename, width, height, skindata, TEXTYPE_RGBA, textureflags, NULL);
1018                 if (textureflags & TEXF_ALPHA)
1019                 {
1020                         for (i = 3;i < width * height * 4;i += 4)
1021                                 if (skindata[i] < 255)
1022                                         break;
1023                         if (i < width * height * 4)
1024                         {
1025                                 unsigned char *fogpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 4);
1026                                 memcpy(fogpixels, skindata, width * height * 4);
1027                                 for (i = 0;i < width * height * 4;i += 4)
1028                                         fogpixels[i] = fogpixels[i+1] = fogpixels[i+2] = 255;
1029                                 skinframe->fog = R_LoadTexture2D(loadmodel->texturepool, va("%s_fog", basename), width, height, fogpixels, TEXTYPE_RGBA, textureflags, NULL);
1030                                 Mem_Free(fogpixels);
1031                         }
1032                 }
1033         }
1034         else if (bitsperpixel == 8)
1035         {
1036                 if (r_shadow_bumpscale_basetexture.value > 0)
1037                 {
1038                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1039                         temp2 = temp1 + width * height * 4;
1040                         if (bitsperpixel == 32)
1041                                 Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1042                         else
1043                         {
1044                                 // use either a custom palette or the quake palette
1045                                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette ? palette : palette_complete);
1046                                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1047                         }
1048                         skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags | TEXF_ALPHA, NULL);
1049                         Mem_Free(temp1);
1050                 }
1051                 // use either a custom palette, or the quake palette
1052                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette ? palette : (loadglowtexture ? palette_nofullbrights : ((textureflags & TEXF_ALPHA) ? palette_transparent : palette_complete)), textureflags); // all
1053                 if (!palette && loadglowtexture)
1054                         skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
1055                 if (!palette && loadpantsandshirt)
1056                 {
1057                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1058                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1059                 }
1060                 if (skinframe->pants || skinframe->shirt)
1061                         skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename),loadglowtexture ? palette_nocolormapnofullbrights : palette_nocolormap, textureflags); // no special colors
1062                 if (textureflags & TEXF_ALPHA)
1063                 {
1064                         // if not using a custom alphapalette, use the quake one
1065                         if (!alphapalette)
1066                                 alphapalette = palette_alpha;
1067                         for (i = 0;i < width * height;i++)
1068                                 if (((unsigned char *)alphapalette)[skindata[i]*4+3] < 255)
1069                                         break;
1070                         if (i < width * height)
1071                                 skinframe->fog = GL_TextureForSkinLayer(skindata, width, height, va("%s_fog", basename), alphapalette, textureflags); // fog mask
1072                 }
1073         }
1074         else
1075                 return false;
1076         if (!skinframe->nmap)
1077                 skinframe->nmap = r_texture_blanknormalmap;
1078         return true;
1079 }
1080
1081 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1082 {
1083         float v[3], tc[3];
1084         v[0] = ix;
1085         v[1] = iy;
1086         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1087                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1088         else
1089                 v[2] = 0;
1090         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1091         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1092         texcoord2f[0] = tc[0];
1093         texcoord2f[1] = tc[1];
1094 }
1095
1096 void Mod_GetTerrainVertexFromRGBA(const unsigned char *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)
1097 {
1098         float vup[3], vdown[3], vleft[3], vright[3];
1099         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1100         float sv[3], tv[3], nl[3];
1101         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1102         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1103         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1104         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1105         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1106         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1107         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1108         VectorAdd(svector3f, sv, svector3f);
1109         VectorAdd(tvector3f, tv, tvector3f);
1110         VectorAdd(normal3f, nl, normal3f);
1111         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1112         VectorAdd(svector3f, sv, svector3f);
1113         VectorAdd(tvector3f, tv, tvector3f);
1114         VectorAdd(normal3f, nl, normal3f);
1115         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1116         VectorAdd(svector3f, sv, svector3f);
1117         VectorAdd(tvector3f, tv, tvector3f);
1118         VectorAdd(normal3f, nl, normal3f);
1119 }
1120
1121 void Mod_ConstructTerrainPatchFromRGBA(const unsigned char *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)
1122 {
1123         int x, y, ix, iy, *e;
1124         e = element3i;
1125         for (y = 0;y < height;y++)
1126         {
1127                 for (x = 0;x < width;x++)
1128                 {
1129                         e[0] = (y + 1) * (width + 1) + (x + 0);
1130                         e[1] = (y + 0) * (width + 1) + (x + 0);
1131                         e[2] = (y + 1) * (width + 1) + (x + 1);
1132                         e[3] = (y + 0) * (width + 1) + (x + 0);
1133                         e[4] = (y + 0) * (width + 1) + (x + 1);
1134                         e[5] = (y + 1) * (width + 1) + (x + 1);
1135                         e += 6;
1136                 }
1137         }
1138         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1139         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1140                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1141                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1142 }
1143
1144 skinfile_t *Mod_LoadSkinFiles(void)
1145 {
1146         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1147         char *text;
1148         const char *data;
1149         skinfile_t *skinfile = NULL, *first = NULL;
1150         skinfileitem_t *skinfileitem;
1151         char word[10][MAX_QPATH];
1152         overridetagnameset_t tagsets[MAX_SKINS];
1153         overridetagname_t tags[256];
1154
1155 /*
1156 sample file:
1157 U_bodyBox,models/players/Legoman/BikerA2.tga
1158 U_RArm,models/players/Legoman/BikerA1.tga
1159 U_LArm,models/players/Legoman/BikerA1.tga
1160 U_armor,common/nodraw
1161 U_sword,common/nodraw
1162 U_shield,common/nodraw
1163 U_homb,common/nodraw
1164 U_backpack,common/nodraw
1165 U_colcha,common/nodraw
1166 tag_head,
1167 tag_weapon,
1168 tag_torso,
1169 */
1170         memset(tagsets, 0, sizeof(tagsets));
1171         memset(word, 0, sizeof(word));
1172         for (i = 0;i < MAX_SKINS && (data = text = (char *)FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true, NULL));i++)
1173         {
1174                 numtags = 0;
1175
1176                 // If it's the first file we parse
1177                 if (skinfile == NULL)
1178                 {
1179                         skinfile = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1180                         first = skinfile;
1181                 }
1182                 else
1183                 {
1184                         skinfile->next = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1185                         skinfile = skinfile->next;
1186                 }
1187                 skinfile->next = NULL;
1188
1189                 for(line = 0;;line++)
1190                 {
1191                         // parse line
1192                         if (!COM_ParseToken(&data, true))
1193                                 break;
1194                         if (!strcmp(com_token, "\n"))
1195                                 continue;
1196                         words = 0;
1197                         wordsoverflow = false;
1198                         do
1199                         {
1200                                 if (words < 10)
1201                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1202                                 else
1203                                         wordsoverflow = true;
1204                         }
1205                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1206                         if (wordsoverflow)
1207                         {
1208                                 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);
1209                                 continue;
1210                         }
1211                         // words is always >= 1
1212                         if (!strcmp(word[0], "replace"))
1213                         {
1214                                 if (words == 3)
1215                                 {
1216                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1217                                         skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1218                                         skinfileitem->next = skinfile->items;
1219                                         skinfile->items = skinfileitem;
1220                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1221                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1222                                 }
1223                                 else
1224                                         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]);
1225                         }
1226                         else if (words == 2 && !strcmp(word[1], ","))
1227                         {
1228                                 // tag name, like "tag_weapon,"
1229                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1230                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1231                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1232                                 numtags++;
1233                         }
1234                         else if (words == 3 && !strcmp(word[1], ","))
1235                         {
1236                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1237                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1238                                 skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1239                                 skinfileitem->next = skinfile->items;
1240                                 skinfile->items = skinfileitem;
1241                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1242                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1243                         }
1244                         else
1245                                 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);
1246                 }
1247                 Mem_Free(text);
1248
1249                 if (numtags)
1250                 {
1251                         overridetagnameset_t *t;
1252                         t = tagsets + i;
1253                         t->num_overridetagnames = numtags;
1254                         t->data_overridetagnames = (overridetagname_t *)Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1255                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1256                         tagsetsused = true;
1257                 }
1258         }
1259         if (tagsetsused)
1260         {
1261                 loadmodel->data_overridetagnamesforskin = (overridetagnameset_t *)Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1262                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1263         }
1264         if (i)
1265                 loadmodel->numskins = i;
1266         return first;
1267 }
1268
1269 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1270 {
1271         skinfile_t *next;
1272         skinfileitem_t *skinfileitem, *nextitem;
1273         for (;skinfile;skinfile = next)
1274         {
1275                 next = skinfile->next;
1276                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1277                 {
1278                         nextitem = skinfileitem->next;
1279                         Mem_Free(skinfileitem);
1280                 }
1281                 Mem_Free(skinfile);
1282         }
1283 }
1284
1285 int Mod_CountSkinFiles(skinfile_t *skinfile)
1286 {
1287         int i;
1288         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1289         return i;
1290 }
1291
1292 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1293 {
1294         int i;
1295         double isnap = 1.0 / snap;
1296         for (i = 0;i < numvertices*numcomponents;i++)
1297                 vertices[i] = floor(vertices[i]*isnap)*snap;
1298 }
1299
1300 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1301 {
1302         int i, outtriangles;
1303         float d, edgedir[3], temp[3];
1304         // a degenerate triangle is one with no width (thickness, surface area)
1305         // these are characterized by having all 3 points colinear (along a line)
1306         // or having two points identical
1307         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1308         {
1309                 // calculate first edge
1310                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1311                 if (VectorLength2(edgedir) < 0.0001f)
1312                         continue; // degenerate first edge (no length)
1313                 VectorNormalize(edgedir);
1314                 // check if third point is on the edge (colinear)
1315                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1316                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1317                 if (VectorLength2(temp) < 0.0001f)
1318                         continue; // third point colinear with first edge
1319                 // valid triangle (no colinear points, no duplicate points)
1320                 VectorCopy(inelement3i, outelement3i);
1321                 outelement3i += 3;
1322                 outtriangles++;
1323         }
1324         return outtriangles;
1325 }
1326