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] && 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 || mod->mempool)
  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         strlcpy(name, mod->name, sizeof(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         strlcpy(mod->name, name, sizeof(mod->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
 158         // even if the model is loaded it still may need reloading...
 159
 160         // if the model is a worldmodel and is being referred to as a
 161         // non-worldmodel here, then it needs reloading to get rid of the
 162         // submodels
 163         if (mod->isworldmodel != isworldmodel)
 164                 mod->loaded = false;
 165
 166         // if it is not loaded or checkdisk is true we need to calculate the crc
 167         if (!mod->loaded || checkdisk)
 168         {
 169                 if (checkdisk && mod->loaded)
 170                         Con_DPrintf("checking model %s\n", mod->name);
 171                 buf = FS_LoadFile (mod->name, tempmempool, false, &filesize);
 172                 if (buf)
 173                 {
 174                         crc = CRC_Block((unsigned char *)buf, filesize);
 175                         // we need to reload the model if the crc does not match
 176                         if (mod->crc != crc)
 177                                 mod->loaded = false;
 178                 }
 179         }
 180
 181         // if the model is already loaded and checks passed, just return
 182         if (mod->loaded)
 183         {
 184                 if (buf)
 185                         Mem_Free(buf);
 186                 return mod;
 187         }
 188
 189         Con_DPrintf("loading model %s\n", mod->name);
 190         // LordHavoc: unload the existing model in this slot (if there is one)
 191         if (mod->loaded || mod->mempool)
 192                 Mod_UnloadModel(mod);
 193
 194         // load the model
 195         mod->isworldmodel = isworldmodel;
 196         mod->used = true;
 197         mod->crc = crc;
 198         // errors can prevent the corresponding mod->loaded = true;
 199         mod->loaded = false;
 200
 201         // default model radius and bounding box (mainly for missing models)
 202         mod->radius = 16;
 203         VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
 204         VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
 205         VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
 206         VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
 207         VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
 208         VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 209
 210         if (buf)
 211         {
 212                 char *bufend = (char *)buf + filesize;
 213
 214                 // all models use memory, so allocate a memory pool
 215                 mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 216                 // all models load textures, so allocate a texture pool
 217                 if (cls.state != ca_dedicated)
 218                         mod->texturepool = R_AllocTexturePool();
 219
 220                 num = LittleLong(*((int *)buf));
 221                 // call the apropriate loader
 222                 loadmodel = mod;
 223                      if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf, bufend);
 224                 else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf, bufend);
 225                 else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf, bufend);
 226                 else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf, bufend);
 227                 else if (!memcmp(buf, "IDS2", 4)) Mod_IDS2_Load(mod, buf, bufend);
 228                 else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf, bufend);
 229                 else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf, bufend);
 230                 else if (!memcmp(buf, "DARKPLACESMODEL", 16)) Mod_DARKPLACESMODEL_Load(mod, buf, bufend);
 231                 else if (!memcmp(buf, "ACTRHEAD", 8)) Mod_PSKMODEL_Load(mod, buf, bufend);
 232                 else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf, bufend);
 233                 else if (!memcmp(buf, "MCBSPpad", 8)) Mod_Q1BSP_Load(mod, buf, bufend);
 234                 else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf, bufend);
 235                 else Con_Printf("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 236                 Mem_Free(buf);
 237                 // no fatal errors occurred, so this model is ready to use.
 238                 mod->loaded = true;
 239         }
 240         else if (crash)
 241         {
 242                 // LordHavoc: Sys_Error was *ANNOYING*
 243                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 244         }
 245         return mod;
 246 }
 247
 248 void Mod_ClearUsed(void)
 249 {
 250 #if 0
 251         int i;
 252         model_t *mod;
 253
 254         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 255                 if (mod->name[0])
 256                         mod->used = false;
 257 #endif
 258 }
 259
 260 void Mod_PurgeUnused(void)
 261 {
 262         int i;
 263         model_t *mod;
 264
 265         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 266                 if (mod->name[0])
 267                         if (!mod->used)
 268                                 Mod_UnloadModel(mod);
 269 }
 270
 271 // only used during loading!
 272 void Mod_RemoveStaleWorldModels(model_t *skip)
 273 {
 274         int i;
 275         model_t *mod;
 276
 277         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 278         {
 279                 if (mod->isworldmodel && mod->loaded && skip != mod)
 280                 {
 281                         Mod_UnloadModel(mod);
 282                         mod->isworldmodel = false;
 283                         mod->used = false;
 284                 }
 285         }
 286 }
 287
 288 /*
 289 ==================
 290 Mod_FindName
 291
 292 ==================
 293 */
 294 model_t *Mod_FindName(const char *name)
 295 {
 296         int i;
 297         model_t *mod;
 298
 299         if (!name[0])
 300                 Host_Error ("Mod_ForName: NULL name");
 301
 302 // search the currently loaded models
 303         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 304         {
 305                 if (mod->name[0] && !strcmp(mod->name, name))
 306                 {
 307                         mod->used = true;
 308                         return mod;
 309                 }
 310         }
 311
 312         // no match found, find room for a new one
 313         for (i = 0;i < mod_numknown;i++)
 314                 if (!mod_known[i].name[0])
 315                         break;
 316
 317         if (mod_maxknown == i)
 318         {
 319 #if 0
 320                 model_t *old;
 321                 mod_maxknown += 256;
 322                 old = mod_known;
 323                 mod_known = Mem_Alloc(mod_mempool, mod_maxknown * sizeof(model_t));
 324                 if (old)
 325                 {
 326                         memcpy(mod_known, old, mod_numknown * sizeof(model_t));
 327                         Mem_Free(old);
 328                 }
 329 #else
 330                 Host_Error ("Mod_FindName: ran out of models");
 331 #endif
 332         }
 333         if (mod_numknown == i)
 334                 mod_numknown++;
 335         mod = mod_known + i;
 336         strlcpy (mod->name, name, sizeof(mod->name));
 337         mod->loaded = false;
 338         mod->used = true;
 339         return mod;
 340 }
 341
 342 /*
 343 ==================
 344 Mod_ForName
 345
 346 Loads in a model for the given name
 347 ==================
 348 */
 349 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 350 {
 351         model_t *model;
 352         model = Mod_FindName(name);
 353         if (model->name[0] != '*' && (!model->loaded || checkdisk))
 354                 Mod_LoadModel(model, crash, checkdisk, isworldmodel);
 355         return model;
 356 }
 357
 358 /*
 359 ==================
 360 Mod_Reload
 361
 362 Reloads all models if they have changed
 363 ==================
 364 */
 365 void Mod_Reload()
 366 {
 367         int i;
 368         model_t *mod;
 369
 370         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 371                 if (mod->name[0] && mod->name[0] != '*')
 372                         if (mod->used)
 373                                 Mod_LoadModel(mod, true, true, mod->isworldmodel);
 374 }
 375
 376 unsigned char *mod_base;
 377
 378
 379 //=============================================================================
 380
 381 /*
 382 ================
 383 Mod_Print
 384 ================
 385 */
 386 static void Mod_Print(void)
 387 {
 388         int             i;
 389         model_t *mod;
 390
 391         Con_Print("Loaded models:\n");
 392         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 393                 if (mod->name[0])
 394                         Con_Printf("%4iK %s\n", mod->mempool ? (int)((mod->mempool->totalsize + 1023) / 1024) : 0, mod->name);
 395 }
 396
 397 /*
 398 ================
 399 Mod_Precache
 400 ================
 401 */
 402 static void Mod_Precache(void)
 403 {
 404         if (Cmd_Argc() == 2)
 405                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 406         else
 407                 Con_Print("usage: modelprecache <filename>\n");
 408 }
 409
 410 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 411 {
 412         int i, count;
 413         unsigned char *used;
 414         used = (unsigned char *)Mem_Alloc(tempmempool, numvertices);
 415         memset(used, 0, numvertices);
 416         for (i = 0;i < numelements;i++)
 417                 used[elements[i]] = 1;
 418         for (i = 0, count = 0;i < numvertices;i++)
 419                 remapvertices[i] = used[i] ? count++ : -1;
 420         Mem_Free(used);
 421         return count;
 422 }
 423
 424 #if 1
 425 // fast way, using an edge hash
 426 #define TRIANGLEEDGEHASH 8192
 427 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 428 {
 429         int i, j, p, e1, e2, *n, hashindex, count, match;
 430         const int *e;
 431         typedef struct edgehashentry_s
 432         {
 433                 struct edgehashentry_s *next;
 434                 int triangle;
 435                 int element[2];
 436         }
 437         edgehashentry_t;
 438         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 439         memset(edgehash, 0, sizeof(edgehash));
 440         edgehashentries = edgehashentriesbuffer;
 441         // if there are too many triangles for the stack array, allocate larger buffer
 442         if (numtriangles > TRIANGLEEDGEHASH)
 443                 edgehashentries = (edgehashentry_t *)Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 444         // find neighboring triangles
 445         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 446         {
 447                 for (j = 0, p = 2;j < 3;p = j, j++)
 448                 {
 449                         e1 = e[p];
 450                         e2 = e[j];
 451                         // this hash index works for both forward and backward edges
 452                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 453                         hash = edgehashentries + i * 3 + j;
 454                         hash->next = edgehash[hashindex];
 455                         edgehash[hashindex] = hash;
 456                         hash->triangle = i;
 457                         hash->element[0] = e1;
 458                         hash->element[1] = e2;
 459                 }
 460         }
 461         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 462         {
 463                 for (j = 0, p = 2;j < 3;p = j, j++)
 464                 {
 465                         e1 = e[p];
 466                         e2 = e[j];
 467                         // this hash index works for both forward and backward edges
 468                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 469                         count = 0;
 470                         match = -1;
 471                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 472                         {
 473                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 474                                 {
 475                                         if (hash->triangle != i)
 476                                                 match = hash->triangle;
 477                                         count++;
 478                                 }
 479                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 480                                         count++;
 481                         }
 482                         // detect edges shared by three triangles and make them seams
 483                         if (count > 2)
 484                                 match = -1;
 485                         n[p] = match;
 486                 }
 487         }
 488         // free the allocated buffer
 489         if (edgehashentries != edgehashentriesbuffer)
 490                 Mem_Free(edgehashentries);
 491 }
 492 #else
 493 // very slow but simple way
 494 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 495 {
 496         int i, match, count;
 497         count = 0;
 498         match = -1;
 499         for (i = 0;i < numtriangles;i++, elements += 3)
 500         {
 501                      if ((elements[0] == start && elements[1] == end)
 502                       || (elements[1] == start && elements[2] == end)
 503                       || (elements[2] == start && elements[0] == end))
 504                 {
 505                         if (i != ignore)
 506                                 match = i;
 507                         count++;
 508                 }
 509                 else if ((elements[1] == start && elements[0] == end)
 510                       || (elements[2] == start && elements[1] == end)
 511                       || (elements[0] == start && elements[2] == end))
 512                         count++;
 513         }
 514         // detect edges shared by three triangles and make them seams
 515         if (count > 2)
 516                 match = -1;
 517         return match;
 518 }
 519
 520 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 521 {
 522         int i, *n;
 523         const int *e;
 524         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 525         {
 526                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 527                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 528                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 529         }
 530 }
 531 #endif
 532
 533 void Mod_ValidateElements(int *elements, int numtriangles, int firstvertex, int numverts, const char *filename, int fileline)
 534 {
 535         int i, warned = false, endvertex = firstvertex + numverts;
 536         for (i = 0;i < numtriangles * 3;i++)
 537         {
 538                 if (elements[i] < firstvertex || elements[i] >= endvertex)
 539                 {
 540                         if (!warned)
 541                         {
 542                                 warned = true;
 543                                 Con_Printf("Mod_ValidateElements: out of bounds elements detected at %s:%d\n", filename, fileline);
 544                         }
 545                         elements[i] = firstvertex;
 546                 }
 547         }
 548 }
 549
 550 // warning: this is an expensive function!
 551 void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting)
 552 {
 553         int i, j;
 554         const int *element;
 555         float *vectorNormal;
 556         float areaNormal[3];
 557         // clear the vectors
 558         memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 559         // process each vertex of each triangle and accumulate the results
 560         // use area-averaging, to make triangles with a big area have a bigger
 561         // weighting on the vertex normal than triangles with a small area
 562         // to do so, just add the 'normals' together (the bigger the area
 563         // the greater the length of the normal is
 564         element = elements;
 565         for (i = 0; i < numtriangles; i++, element += 3)
 566         {
 567                 TriangleNormal(
 568                         vertex3f + element[0] * 3,
 569                         vertex3f + element[1] * 3,
 570                         vertex3f + element[2] * 3,
 571                         areaNormal
 572                         );
 573
 574                 if (!areaweighting)
 575                         VectorNormalize(areaNormal);
 576
 577                 for (j = 0;j < 3;j++)
 578                 {
 579                         vectorNormal = normal3f + element[j] * 3;
 580                         vectorNormal[0] += areaNormal[0];
 581                         vectorNormal[1] += areaNormal[1];
 582                         vectorNormal[2] += areaNormal[2];
 583                 }
 584         }
 585         // and just normalize the accumulated vertex normal in the end
 586         vectorNormal = normal3f + 3 * firstvertex;
 587         for (i = 0; i < numvertices; i++, vectorNormal += 3)
 588                 VectorNormalize(vectorNormal);
 589 }
 590
 591 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)
 592 {
 593         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 594         // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 595         // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 596
 597         // 6 multiply, 9 subtract
 598         VectorSubtract(v1, v0, v10);
 599         VectorSubtract(v2, v0, v20);
 600         normal3f[0] = v20[1] * v10[2] - v20[2] * v10[1];
 601         normal3f[1] = v20[2] * v10[0] - v20[0] * v10[2];
 602         normal3f[2] = v20[0] * v10[1] - v20[1] * v10[0];
 603         // 12 multiply, 10 subtract
 604         tc10[1] = tc1[1] - tc0[1];
 605         tc20[1] = tc2[1] - tc0[1];
 606         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 607         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 608         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 609         tc10[0] = tc1[0] - tc0[0];
 610         tc20[0] = tc2[0] - tc0[0];
 611         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 612         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 613         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 614         // 12 multiply, 4 add, 6 subtract
 615         f = DotProduct(svector3f, normal3f);
 616         svector3f[0] -= f * normal3f[0];
 617         svector3f[1] -= f * normal3f[1];
 618         svector3f[2] -= f * normal3f[2];
 619         f = DotProduct(tvector3f, normal3f);
 620         tvector3f[0] -= f * normal3f[0];
 621         tvector3f[1] -= f * normal3f[1];
 622         tvector3f[2] -= f * normal3f[2];
 623         // if texture is mapped the wrong way (counterclockwise), the tangents
 624         // have to be flipped, this is detected by calculating a normal from the
 625         // two tangents, and seeing if it is opposite the surface normal
 626         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 627         CrossProduct(tvector3f, svector3f, tangentcross);
 628         if (DotProduct(tangentcross, normal3f) < 0)
 629         {
 630                 VectorNegate(svector3f, svector3f);
 631                 VectorNegate(tvector3f, tvector3f);
 632         }
 633 }
 634
 635 // warning: this is a very expensive function!
 636 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)
 637 {
 638         int i, tnum;
 639         float sdir[3], tdir[3], normal[3], *sv, *tv;
 640         const float *v0, *v1, *v2, *tc0, *tc1, *tc2, *n;
 641         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 642         const int *e;
 643         // clear the vectors
 644         memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 645         memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 646         // process each vertex of each triangle and accumulate the results
 647         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 648         {
 649                 v0 = vertex3f + e[0] * 3;
 650                 v1 = vertex3f + e[1] * 3;
 651                 v2 = vertex3f + e[2] * 3;
 652                 tc0 = texcoord2f + e[0] * 2;
 653                 tc1 = texcoord2f + e[1] * 2;
 654                 tc2 = texcoord2f + e[2] * 2;
 655
 656                 // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 657                 // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 658
 659                 // calculate the edge directions and surface normal
 660                 // 6 multiply, 9 subtract
 661                 VectorSubtract(v1, v0, v10);
 662                 VectorSubtract(v2, v0, v20);
 663                 normal[0] = v20[1] * v10[2] - v20[2] * v10[1];
 664                 normal[1] = v20[2] * v10[0] - v20[0] * v10[2];
 665                 normal[2] = v20[0] * v10[1] - v20[1] * v10[0];
 666
 667                 // calculate the tangents
 668                 // 12 multiply, 10 subtract
 669                 tc10[1] = tc1[1] - tc0[1];
 670                 tc20[1] = tc2[1] - tc0[1];
 671                 sdir[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 672                 sdir[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 673                 sdir[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 674                 tc10[0] = tc1[0] - tc0[0];
 675                 tc20[0] = tc2[0] - tc0[0];
 676                 tdir[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 677                 tdir[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 678                 tdir[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 679
 680                 // if texture is mapped the wrong way (counterclockwise), the tangents
 681                 // have to be flipped, this is detected by calculating a normal from the
 682                 // two tangents, and seeing if it is opposite the surface normal
 683                 // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 684                 CrossProduct(tdir, sdir, tangentcross);
 685                 if (DotProduct(tangentcross, normal) < 0)
 686                 {
 687                         VectorNegate(sdir, sdir);
 688                         VectorNegate(tdir, tdir);
 689                 }
 690
 691                 if (!areaweighting)
 692                 {
 693                         VectorNormalize(sdir);
 694                         VectorNormalize(tdir);
 695                 }
 696                 for (i = 0;i < 3;i++)
 697                 {
 698                         VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
 699                         VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
 700                 }
 701         }
 702         // make the tangents completely perpendicular to the surface normal, and
 703         // then normalize them
 704         // 16 assignments, 2 divide, 2 sqrt, 2 negates, 14 adds, 24 multiplies
 705         for (i = 0, sv = svector3f + 3 * firstvertex, tv = tvector3f + 3 * firstvertex, n = normal3f + 3 * firstvertex;i < numvertices;i++, sv += 3, tv += 3, n += 3)
 706         {
 707                 f = -DotProduct(sv, n);
 708                 VectorMA(sv, f, n, sv);
 709                 VectorNormalize(sv);
 710                 f = -DotProduct(tv, n);
 711                 VectorMA(tv, f, n, tv);
 712                 VectorNormalize(tv);
 713         }
 714 }
 715
 716 void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 717 {
 718         unsigned char *data;
 719         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));
 720         loadmodel->surfmesh.num_vertices = numvertices;
 721         loadmodel->surfmesh.num_triangles = numtriangles;
 722         if (loadmodel->surfmesh.num_vertices)
 723         {
 724                 loadmodel->surfmesh.data_vertex3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 725                 loadmodel->surfmesh.data_svector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 726                 loadmodel->surfmesh.data_tvector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 727                 loadmodel->surfmesh.data_normal3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 728                 loadmodel->surfmesh.data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 729                 loadmodel->surfmesh.data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 730                 if (vertexcolors)
 731                         loadmodel->surfmesh.data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * loadmodel->surfmesh.num_vertices;
 732                 if (lightmapoffsets)
 733                         loadmodel->surfmesh.data_lightmapoffsets = (int *)data, data += sizeof(int) * loadmodel->surfmesh.num_vertices;
 734         }
 735         if (loadmodel->surfmesh.num_triangles)
 736         {
 737                 loadmodel->surfmesh.data_element3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 738                 if (neighbors)
 739                         loadmodel->surfmesh.data_neighbor3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 740         }
 741 }
 742
 743 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)
 744 {
 745         shadowmesh_t *newmesh;
 746         unsigned char *data;
 747         int size;
 748         size = sizeof(shadowmesh_t);
 749         size += maxverts * sizeof(float[3]);
 750         if (light)
 751                 size += maxverts * sizeof(float[11]);
 752         size += maxtriangles * sizeof(int[3]);
 753         if (neighbors)
 754                 size += maxtriangles * sizeof(int[3]);
 755         if (expandable)
 756                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 757         data = (unsigned char *)Mem_Alloc(mempool, size);
 758         newmesh = (shadowmesh_t *)data;data += sizeof(*newmesh);
 759         newmesh->map_diffuse = map_diffuse;
 760         newmesh->map_specular = map_specular;
 761         newmesh->map_normal = map_normal;
 762         newmesh->maxverts = maxverts;
 763         newmesh->maxtriangles = maxtriangles;
 764         newmesh->numverts = 0;
 765         newmesh->numtriangles = 0;
 766
 767         newmesh->vertex3f = (float *)data;data += maxverts * sizeof(float[3]);
 768         if (light)
 769         {
 770                 newmesh->svector3f = (float *)data;data += maxverts * sizeof(float[3]);
 771                 newmesh->tvector3f = (float *)data;data += maxverts * sizeof(float[3]);
 772                 newmesh->normal3f = (float *)data;data += maxverts * sizeof(float[3]);
 773                 newmesh->texcoord2f = (float *)data;data += maxverts * sizeof(float[2]);
 774         }
 775         newmesh->element3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 776         if (neighbors)
 777         {
 778                 newmesh->neighbor3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 779         }
 780         if (expandable)
 781         {
 782                 newmesh->vertexhashtable = (shadowmeshvertexhash_t **)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 783                 newmesh->vertexhashentries = (shadowmeshvertexhash_t *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 784         }
 785         return newmesh;
 786 }
 787
 788 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 789 {
 790         shadowmesh_t *newmesh;
 791         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 792         newmesh->numverts = oldmesh->numverts;
 793         newmesh->numtriangles = oldmesh->numtriangles;
 794
 795         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 796         if (newmesh->svector3f && oldmesh->svector3f)
 797         {
 798                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 799                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 800                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 801                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 802         }
 803         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 804         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 805                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 806         return newmesh;
 807 }
 808
 809 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 810 {
 811         int hashindex, vnum;
 812         shadowmeshvertexhash_t *hash;
 813         // this uses prime numbers intentionally
 814         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 815         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 816         {
 817                 vnum = (hash - mesh->vertexhashentries);
 818                 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]))
 819                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 820                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 821                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 822                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 823                         return hash - mesh->vertexhashentries;
 824         }
 825         vnum = mesh->numverts++;
 826         hash = mesh->vertexhashentries + vnum;
 827         hash->next = mesh->vertexhashtable[hashindex];
 828         mesh->vertexhashtable[hashindex] = hash;
 829         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 830         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 831         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 832         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 833         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 834         return vnum;
 835 }
 836
 837 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 838 {
 839         if (mesh->numtriangles == 0)
 840         {
 841                 // set the properties on this empty mesh to be more favorable...
 842                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 843                 mesh->map_diffuse = map_diffuse;
 844                 mesh->map_specular = map_specular;
 845                 mesh->map_normal = map_normal;
 846         }
 847         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)
 848         {
 849                 if (mesh->next == NULL)
 850                         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);
 851                 mesh = mesh->next;
 852         }
 853         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 854         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 855         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 856         mesh->numtriangles++;
 857 }
 858
 859 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)
 860 {
 861         int i, j, e;
 862         float vbuf[3*14], *v;
 863         memset(vbuf, 0, sizeof(vbuf));
 864         for (i = 0;i < numtris;i++)
 865         {
 866                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 867                 {
 868                         e = *element3i++;
 869                         if (vertex3f)
 870                         {
 871                                 v[0] = vertex3f[e * 3 + 0];
 872                                 v[1] = vertex3f[e * 3 + 1];
 873                                 v[2] = vertex3f[e * 3 + 2];
 874                         }
 875                         if (svector3f)
 876                         {
 877                                 v[3] = svector3f[e * 3 + 0];
 878                                 v[4] = svector3f[e * 3 + 1];
 879                                 v[5] = svector3f[e * 3 + 2];
 880                         }
 881                         if (tvector3f)
 882                         {
 883                                 v[6] = tvector3f[e * 3 + 0];
 884                                 v[7] = tvector3f[e * 3 + 1];
 885                                 v[8] = tvector3f[e * 3 + 2];
 886                         }
 887                         if (normal3f)
 888                         {
 889                                 v[9] = normal3f[e * 3 + 0];
 890                                 v[10] = normal3f[e * 3 + 1];
 891                                 v[11] = normal3f[e * 3 + 2];
 892                         }
 893                         if (texcoord2f)
 894                         {
 895                                 v[12] = texcoord2f[e * 2 + 0];
 896                                 v[13] = texcoord2f[e * 2 + 1];
 897                         }
 898                 }
 899                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 900         }
 901 }
 902
 903 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)
 904 {
 905         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 906 }
 907
 908 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 909 {
 910         shadowmesh_t *mesh, *newmesh, *nextmesh;
 911         // reallocate meshs to conserve space
 912         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 913         {
 914                 nextmesh = mesh->next;
 915                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 916                 {
 917                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 918                         newmesh->next = firstmesh;
 919                         firstmesh = newmesh;
 920                 }
 921                 Mem_Free(mesh);
 922         }
 923         return firstmesh;
 924 }
 925
 926 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 927 {
 928         int i;
 929         shadowmesh_t *mesh;
 930         vec3_t nmins, nmaxs, ncenter, temp;
 931         float nradius2, dist2, *v;
 932         VectorClear(nmins);
 933         VectorClear(nmaxs);
 934         // calculate bbox
 935         for (mesh = firstmesh;mesh;mesh = mesh->next)
 936         {
 937                 if (mesh == firstmesh)
 938                 {
 939                         VectorCopy(mesh->vertex3f, nmins);
 940                         VectorCopy(mesh->vertex3f, nmaxs);
 941                 }
 942                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 943                 {
 944                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 945                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 946                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 947                 }
 948         }
 949         // calculate center and radius
 950         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 951         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 952         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 953         nradius2 = 0;
 954         for (mesh = firstmesh;mesh;mesh = mesh->next)
 955         {
 956                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 957                 {
 958                         VectorSubtract(v, ncenter, temp);
 959                         dist2 = DotProduct(temp, temp);
 960                         if (nradius2 < dist2)
 961                                 nradius2 = dist2;
 962                 }
 963         }
 964         // return data
 965         if (mins)
 966                 VectorCopy(nmins, mins);
 967         if (maxs)
 968                 VectorCopy(nmaxs, maxs);
 969         if (center)
 970                 VectorCopy(ncenter, center);
 971         if (radius)
 972                 *radius = sqrt(nradius2);
 973 }
 974
 975 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 976 {
 977         shadowmesh_t *nextmesh;
 978         for (;mesh;mesh = nextmesh)
 979         {
 980                 nextmesh = mesh->next;
 981                 Mem_Free(mesh);
 982         }
 983 }
 984
 985 static rtexture_t *GL_TextureForSkinLayer(const unsigned char *in, int width, int height, const char *name, const unsigned int *palette, int textureflags, qboolean force)
 986 {
 987         int i;
 988         if (!force)
 989         {
 990                 for (i = 0;i < width*height;i++)
 991                         if (((unsigned char *)&palette[in[i]])[3] > 0)
 992                                 break;
 993                 if (i == width*height)
 994                         return NULL;
 995         }
 996         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 997 }
 998
 999 int Mod_LoadSkinFrame(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture)
1000 {
1001         imageskin_t s;
1002         memset(skinframe, 0, sizeof(*skinframe));
1003         skinframe->base = r_texture_notexture;
1004         if (cls.state == ca_dedicated)
1005                 return false;
1006         if (!image_loadskin(&s, basename))
1007                 return false;
1008         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
1009         if (s.nmappixels != NULL)
1010                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
1011         if (s.glosspixels != NULL)
1012                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
1013         if (s.glowpixels != NULL && loadglowtexture)
1014                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
1015         if (s.maskpixels != NULL)
1016                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
1017         if (loadpantsandshirt)
1018         {
1019                 if (s.pantspixels != NULL)
1020                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
1021                 if (s.shirtpixels != NULL)
1022                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
1023         }
1024         if (!skinframe->base)
1025                 skinframe->base = r_texture_notexture;
1026         if (!skinframe->nmap)
1027                 skinframe->nmap = r_texture_blanknormalmap;
1028         image_freeskin(&s);
1029         return true;
1030 }
1031
1032 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)
1033 {
1034         int i;
1035         unsigned char *temp1, *temp2;
1036         memset(skinframe, 0, sizeof(*skinframe));
1037         if (cls.state == ca_dedicated)
1038                 return false;
1039         if (!skindata)
1040                 return false;
1041         if (bitsperpixel == 32)
1042         {
1043                 if (r_shadow_bumpscale_basetexture.value > 0)
1044                 {
1045                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1046                         temp2 = temp1 + width * height * 4;
1047                         Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
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                 skinframe->base = skinframe->merged = R_LoadTexture2D(loadmodel->texturepool, basename, width, height, skindata, TEXTYPE_RGBA, textureflags, NULL);
1052                 if (textureflags & TEXF_ALPHA)
1053                 {
1054                         for (i = 3;i < width * height * 4;i += 4)
1055                                 if (skindata[i] < 255)
1056                                         break;
1057                         if (i < width * height * 4)
1058                         {
1059                                 unsigned char *fogpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 4);
1060                                 memcpy(fogpixels, skindata, width * height * 4);
1061                                 for (i = 0;i < width * height * 4;i += 4)
1062                                         fogpixels[i] = fogpixels[i+1] = fogpixels[i+2] = 255;
1063                                 skinframe->fog = R_LoadTexture2D(loadmodel->texturepool, va("%s_fog", basename), width, height, fogpixels, TEXTYPE_RGBA, textureflags, NULL);
1064                                 Mem_Free(fogpixels);
1065                         }
1066                 }
1067         }
1068         else if (bitsperpixel == 8)
1069         {
1070                 if (r_shadow_bumpscale_basetexture.value > 0)
1071                 {
1072                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1073                         temp2 = temp1 + width * height * 4;
1074                         if (bitsperpixel == 32)
1075                                 Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1076                         else
1077                         {
1078                                 // use either a custom palette or the quake palette
1079                                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette ? palette : palette_complete);
1080                                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1081                         }
1082                         skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags | TEXF_ALPHA, NULL);
1083                         Mem_Free(temp1);
1084                 }
1085                 // use either a custom palette, or the quake palette
1086                 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, true); // all
1087                 if (!palette && loadglowtexture)
1088                         skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags, false); // glow
1089                 if (!palette && loadpantsandshirt)
1090                 {
1091                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags, false); // pants
1092                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags, false); // shirt
1093                 }
1094                 if (skinframe->pants || skinframe->shirt)
1095                         skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename),loadglowtexture ? palette_nocolormapnofullbrights : palette_nocolormap, textureflags, false); // no special colors
1096                 if (textureflags & TEXF_ALPHA)
1097                 {
1098                         // if not using a custom alphapalette, use the quake one
1099                         if (!alphapalette)
1100                                 alphapalette = palette_alpha;
1101                         for (i = 0;i < width * height;i++)
1102                                 if (((unsigned char *)alphapalette)[skindata[i]*4+3] < 255)
1103                                         break;
1104                         if (i < width * height)
1105                                 skinframe->fog = GL_TextureForSkinLayer(skindata, width, height, va("%s_fog", basename), alphapalette, textureflags, true); // fog mask
1106                 }
1107         }
1108         else
1109                 return false;
1110         if (!skinframe->nmap)
1111                 skinframe->nmap = r_texture_blanknormalmap;
1112         return true;
1113 }
1114
1115 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)
1116 {
1117         float v[3], tc[3];
1118         v[0] = ix;
1119         v[1] = iy;
1120         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1121                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1122         else
1123                 v[2] = 0;
1124         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1125         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1126         texcoord2f[0] = tc[0];
1127         texcoord2f[1] = tc[1];
1128 }
1129
1130 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)
1131 {
1132         float vup[3], vdown[3], vleft[3], vright[3];
1133         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1134         float sv[3], tv[3], nl[3];
1135         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1136         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1137         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1138         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1139         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1140         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1141         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1142         VectorAdd(svector3f, sv, svector3f);
1143         VectorAdd(tvector3f, tv, tvector3f);
1144         VectorAdd(normal3f, nl, normal3f);
1145         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1146         VectorAdd(svector3f, sv, svector3f);
1147         VectorAdd(tvector3f, tv, tvector3f);
1148         VectorAdd(normal3f, nl, normal3f);
1149         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1150         VectorAdd(svector3f, sv, svector3f);
1151         VectorAdd(tvector3f, tv, tvector3f);
1152         VectorAdd(normal3f, nl, normal3f);
1153 }
1154
1155 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)
1156 {
1157         int x, y, ix, iy, *e;
1158         e = element3i;
1159         for (y = 0;y < height;y++)
1160         {
1161                 for (x = 0;x < width;x++)
1162                 {
1163                         e[0] = (y + 1) * (width + 1) + (x + 0);
1164                         e[1] = (y + 0) * (width + 1) + (x + 0);
1165                         e[2] = (y + 1) * (width + 1) + (x + 1);
1166                         e[3] = (y + 0) * (width + 1) + (x + 0);
1167                         e[4] = (y + 0) * (width + 1) + (x + 1);
1168                         e[5] = (y + 1) * (width + 1) + (x + 1);
1169                         e += 6;
1170                 }
1171         }
1172         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1173         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1174                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1175                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1176 }
1177
1178 skinfile_t *Mod_LoadSkinFiles(void)
1179 {
1180         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1181         char *text;
1182         const char *data;
1183         skinfile_t *skinfile = NULL, *first = NULL;
1184         skinfileitem_t *skinfileitem;
1185         char word[10][MAX_QPATH];
1186         overridetagnameset_t tagsets[MAX_SKINS];
1187         overridetagname_t tags[256];
1188
1189 /*
1190 sample file:
1191 U_bodyBox,models/players/Legoman/BikerA2.tga
1192 U_RArm,models/players/Legoman/BikerA1.tga
1193 U_LArm,models/players/Legoman/BikerA1.tga
1194 U_armor,common/nodraw
1195 U_sword,common/nodraw
1196 U_shield,common/nodraw
1197 U_homb,common/nodraw
1198 U_backpack,common/nodraw
1199 U_colcha,common/nodraw
1200 tag_head,
1201 tag_weapon,
1202 tag_torso,
1203 */
1204         memset(tagsets, 0, sizeof(tagsets));
1205         memset(word, 0, sizeof(word));
1206         for (i = 0;i < MAX_SKINS && (data = text = (char *)FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true, NULL));i++)
1207         {
1208                 numtags = 0;
1209
1210                 // If it's the first file we parse
1211                 if (skinfile == NULL)
1212                 {
1213                         skinfile = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1214                         first = skinfile;
1215                 }
1216                 else
1217                 {
1218                         skinfile->next = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1219                         skinfile = skinfile->next;
1220                 }
1221                 skinfile->next = NULL;
1222
1223                 for(line = 0;;line++)
1224                 {
1225                         // parse line
1226                         if (!COM_ParseToken(&data, true))
1227                                 break;
1228                         if (!strcmp(com_token, "\n"))
1229                                 continue;
1230                         words = 0;
1231                         wordsoverflow = false;
1232                         do
1233                         {
1234                                 if (words < 10)
1235                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1236                                 else
1237                                         wordsoverflow = true;
1238                         }
1239                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1240                         if (wordsoverflow)
1241                         {
1242                                 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);
1243                                 continue;
1244                         }
1245                         // words is always >= 1
1246                         if (!strcmp(word[0], "replace"))
1247                         {
1248                                 if (words == 3)
1249                                 {
1250                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1251                                         skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1252                                         skinfileitem->next = skinfile->items;
1253                                         skinfile->items = skinfileitem;
1254                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1255                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1256                                 }
1257                                 else
1258                                         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]);
1259                         }
1260                         else if (words == 2 && !strcmp(word[1], ","))
1261                         {
1262                                 // tag name, like "tag_weapon,"
1263                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1264                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1265                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1266                                 numtags++;
1267                         }
1268                         else if (words == 3 && !strcmp(word[1], ","))
1269                         {
1270                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1271                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1272                                 skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1273                                 skinfileitem->next = skinfile->items;
1274                                 skinfile->items = skinfileitem;
1275                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1276                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1277                         }
1278                         else
1279                                 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);
1280                 }
1281                 Mem_Free(text);
1282
1283                 if (numtags)
1284                 {
1285                         overridetagnameset_t *t;
1286                         t = tagsets + i;
1287                         t->num_overridetagnames = numtags;
1288                         t->data_overridetagnames = (overridetagname_t *)Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1289                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1290                         tagsetsused = true;
1291                 }
1292         }
1293         if (tagsetsused)
1294         {
1295                 loadmodel->data_overridetagnamesforskin = (overridetagnameset_t *)Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1296                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1297         }
1298         if (i)
1299                 loadmodel->numskins = i;
1300         return first;
1301 }
1302
1303 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1304 {
1305         skinfile_t *next;
1306         skinfileitem_t *skinfileitem, *nextitem;
1307         for (;skinfile;skinfile = next)
1308         {
1309                 next = skinfile->next;
1310                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1311                 {
1312                         nextitem = skinfileitem->next;
1313                         Mem_Free(skinfileitem);
1314                 }
1315                 Mem_Free(skinfile);
1316         }
1317 }
1318
1319 int Mod_CountSkinFiles(skinfile_t *skinfile)
1320 {
1321         int i;
1322         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1323         return i;
1324 }
1325
1326 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1327 {
1328         int i;
1329         double isnap = 1.0 / snap;
1330         for (i = 0;i < numvertices*numcomponents;i++)
1331                 vertices[i] = floor(vertices[i]*isnap)*snap;
1332 }
1333
1334 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1335 {
1336         int i, outtriangles;
1337         float d, edgedir[3], temp[3];
1338         // a degenerate triangle is one with no width (thickness, surface area)
1339         // these are characterized by having all 3 points colinear (along a line)
1340         // or having two points identical
1341         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1342         {
1343                 // calculate first edge
1344                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1345                 if (VectorLength2(edgedir) < 0.0001f)
1346                         continue; // degenerate first edge (no length)
1347                 VectorNormalize(edgedir);
1348                 // check if third point is on the edge (colinear)
1349                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1350                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1351                 if (VectorLength2(temp) < 0.0001f)
1352                         continue; // third point colinear with first edge
1353                 // valid triangle (no colinear points, no duplicate points)
1354                 VectorCopy(inelement3i, outelement3i);
1355                 outelement3i += 3;
1356                 outtriangles++;
1357         }
1358         return outtriangles;
1359 }
1360