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                 // no fatal errors occurred, so this model is ready to use.
 227                 mod->loaded = true;
 228         }
 229         else if (crash)
 230         {
 231                 // LordHavoc: Sys_Error was *ANNOYING*
 232                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 233         }
 234         return mod;
 235 }
 236
 237 void Mod_ClearUsed(void)
 238 {
 239 #if 0
 240         int i;
 241         model_t *mod;
 242
 243         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 244                 if (mod->name[0])
 245                         mod->used = false;
 246 #endif
 247 }
 248
 249 void Mod_PurgeUnused(void)
 250 {
 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                         if (!mod->used)
 257                                 Mod_UnloadModel(mod);
 258 }
 259
 260 // only used during loading!
 261 void Mod_RemoveStaleWorldModels(model_t *skip)
 262 {
 263         int i;
 264         model_t *mod;
 265
 266         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 267         {
 268                 if (mod->isworldmodel && mod->loaded && skip != mod)
 269                 {
 270                         Mod_UnloadModel(mod);
 271                         mod->isworldmodel = false;
 272                         mod->used = false;
 273                 }
 274         }
 275 }
 276
 277 /*
 278 ==================
 279 Mod_FindName
 280
 281 ==================
 282 */
 283 model_t *Mod_FindName(const char *name)
 284 {
 285         int i;
 286         model_t *mod;
 287
 288         if (!name[0])
 289                 Host_Error ("Mod_ForName: NULL name");
 290
 291 // search the currently loaded models
 292         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 293         {
 294                 if (mod->name[0] && !strcmp(mod->name, name))
 295                 {
 296                         mod->used = true;
 297                         return mod;
 298                 }
 299         }
 300
 301         // no match found, find room for a new one
 302         for (i = 0;i < mod_numknown;i++)
 303                 if (!mod_known[i].name[0])
 304                         break;
 305
 306         if (mod_maxknown == i)
 307         {
 308 #if 0
 309                 model_t *old;
 310                 mod_maxknown += 256;
 311                 old = mod_known;
 312                 mod_known = Mem_Alloc(mod_mempool, mod_maxknown * sizeof(model_t));
 313                 if (old)
 314                 {
 315                         memcpy(mod_known, old, mod_numknown * sizeof(model_t));
 316                         Mem_Free(old);
 317                 }
 318 #else
 319                 Host_Error ("Mod_FindName: ran out of models");
 320 #endif
 321         }
 322         if (mod_numknown == i)
 323                 mod_numknown++;
 324         mod = mod_known + i;
 325         strcpy (mod->name, name);
 326         mod->loaded = false;
 327         mod->used = true;
 328         return mod;
 329 }
 330
 331 /*
 332 ==================
 333 Mod_ForName
 334
 335 Loads in a model for the given name
 336 ==================
 337 */
 338 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 339 {
 340         model_t *model;
 341         model = Mod_FindName(name);
 342         if (model->name[0] != '*' && (!model->loaded || checkdisk))
 343                 Mod_LoadModel(model, crash, checkdisk, isworldmodel);
 344         return model;
 345 }
 346
 347 /*
 348 ==================
 349 Mod_Reload
 350
 351 Reloads all models if they have changed
 352 ==================
 353 */
 354 void Mod_Reload()
 355 {
 356         int i;
 357         model_t *mod;
 358
 359         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 360                 if (mod->name[0])
 361                         if (mod->used)
 362                                 Mod_LoadModel(mod, true, true, mod->isworldmodel);
 363 }
 364
 365 unsigned char *mod_base;
 366
 367
 368 //=============================================================================
 369
 370 /*
 371 ================
 372 Mod_Print
 373 ================
 374 */
 375 static void Mod_Print(void)
 376 {
 377         int             i;
 378         model_t *mod;
 379
 380         Con_Print("Loaded models:\n");
 381         for (i = 0, mod = mod_known;i < mod_numknown;i++, mod++)
 382                 if (mod->name[0])
 383                         Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 384 }
 385
 386 /*
 387 ================
 388 Mod_Precache
 389 ================
 390 */
 391 static void Mod_Precache(void)
 392 {
 393         if (Cmd_Argc() == 2)
 394                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 395         else
 396                 Con_Print("usage: modelprecache <filename>\n");
 397 }
 398
 399 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 400 {
 401         int i, count;
 402         unsigned char *used;
 403         used = (unsigned char *)Mem_Alloc(tempmempool, numvertices);
 404         memset(used, 0, numvertices);
 405         for (i = 0;i < numelements;i++)
 406                 used[elements[i]] = 1;
 407         for (i = 0, count = 0;i < numvertices;i++)
 408                 remapvertices[i] = used[i] ? count++ : -1;
 409         Mem_Free(used);
 410         return count;
 411 }
 412
 413 #if 1
 414 // fast way, using an edge hash
 415 #define TRIANGLEEDGEHASH 8192
 416 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 417 {
 418         int i, j, p, e1, e2, *n, hashindex, count, match;
 419         const int *e;
 420         typedef struct edgehashentry_s
 421         {
 422                 struct edgehashentry_s *next;
 423                 int triangle;
 424                 int element[2];
 425         }
 426         edgehashentry_t;
 427         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 428         memset(edgehash, 0, sizeof(edgehash));
 429         edgehashentries = edgehashentriesbuffer;
 430         // if there are too many triangles for the stack array, allocate larger buffer
 431         if (numtriangles > TRIANGLEEDGEHASH)
 432                 edgehashentries = (edgehashentry_t *)Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 433         // find neighboring triangles
 434         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 435         {
 436                 for (j = 0, p = 2;j < 3;p = j, j++)
 437                 {
 438                         e1 = e[p];
 439                         e2 = e[j];
 440                         // this hash index works for both forward and backward edges
 441                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 442                         hash = edgehashentries + i * 3 + j;
 443                         hash->next = edgehash[hashindex];
 444                         edgehash[hashindex] = hash;
 445                         hash->triangle = i;
 446                         hash->element[0] = e1;
 447                         hash->element[1] = e2;
 448                 }
 449         }
 450         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 451         {
 452                 for (j = 0, p = 2;j < 3;p = j, j++)
 453                 {
 454                         e1 = e[p];
 455                         e2 = e[j];
 456                         // this hash index works for both forward and backward edges
 457                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 458                         count = 0;
 459                         match = -1;
 460                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 461                         {
 462                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 463                                 {
 464                                         if (hash->triangle != i)
 465                                                 match = hash->triangle;
 466                                         count++;
 467                                 }
 468                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 469                                         count++;
 470                         }
 471                         // detect edges shared by three triangles and make them seams
 472                         if (count > 2)
 473                                 match = -1;
 474                         n[p] = match;
 475                 }
 476         }
 477         // free the allocated buffer
 478         if (edgehashentries != edgehashentriesbuffer)
 479                 Mem_Free(edgehashentries);
 480 }
 481 #else
 482 // very slow but simple way
 483 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 484 {
 485         int i, match, count;
 486         count = 0;
 487         match = -1;
 488         for (i = 0;i < numtriangles;i++, elements += 3)
 489         {
 490                      if ((elements[0] == start && elements[1] == end)
 491                       || (elements[1] == start && elements[2] == end)
 492                       || (elements[2] == start && elements[0] == end))
 493                 {
 494                         if (i != ignore)
 495                                 match = i;
 496                         count++;
 497                 }
 498                 else if ((elements[1] == start && elements[0] == end)
 499                       || (elements[2] == start && elements[1] == end)
 500                       || (elements[0] == start && elements[2] == end))
 501                         count++;
 502         }
 503         // detect edges shared by three triangles and make them seams
 504         if (count > 2)
 505                 match = -1;
 506         return match;
 507 }
 508
 509 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 510 {
 511         int i, *n;
 512         const int *e;
 513         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 514         {
 515                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 516                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 517                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 518         }
 519 }
 520 #endif
 521
 522 void Mod_ValidateElements(int *elements, int numtriangles, int firstvertex, int numverts, const char *filename, int fileline)
 523 {
 524         int i, warned = false, endvertex = firstvertex + numverts;
 525         for (i = 0;i < numtriangles * 3;i++)
 526         {
 527                 if (elements[i] < firstvertex || elements[i] >= endvertex)
 528                 {
 529                         if (!warned)
 530                         {
 531                                 warned = true;
 532                                 Con_Printf("Mod_ValidateElements: out of bounds elements detected at %s:%d\n", filename, fileline);
 533                         }
 534                         elements[i] = firstvertex;
 535                 }
 536         }
 537 }
 538
 539 // warning: this is an expensive function!
 540 void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting)
 541 {
 542         int i, j;
 543         const int *element;
 544         float *vectorNormal;
 545         float areaNormal[3];
 546         // clear the vectors
 547         memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 548         // process each vertex of each triangle and accumulate the results
 549         // use area-averaging, to make triangles with a big area have a bigger
 550         // weighting on the vertex normal than triangles with a small area
 551         // to do so, just add the 'normals' together (the bigger the area
 552         // the greater the length of the normal is
 553         element = elements;
 554         for (i = 0; i < numtriangles; i++, element += 3)
 555         {
 556                 TriangleNormal(
 557                         vertex3f + element[0] * 3,
 558                         vertex3f + element[1] * 3,
 559                         vertex3f + element[2] * 3,
 560                         areaNormal
 561                         );
 562
 563                 if (!areaweighting)
 564                         VectorNormalize(areaNormal);
 565
 566                 for (j = 0;j < 3;j++)
 567                 {
 568                         vectorNormal = normal3f + element[j] * 3;
 569                         vectorNormal[0] += areaNormal[0];
 570                         vectorNormal[1] += areaNormal[1];
 571                         vectorNormal[2] += areaNormal[2];
 572                 }
 573         }
 574         // and just normalize the accumulated vertex normal in the end
 575         vectorNormal = normal3f + 3 * firstvertex;
 576         for (i = 0; i < numvertices; i++, vectorNormal += 3)
 577                 VectorNormalize(vectorNormal);
 578 }
 579
 580 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)
 581 {
 582         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 583         // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 584         // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 585
 586         // 6 multiply, 9 subtract
 587         VectorSubtract(v1, v0, v10);
 588         VectorSubtract(v2, v0, v20);
 589         normal3f[0] = v20[1] * v10[2] - v20[2] * v10[1];
 590         normal3f[1] = v20[2] * v10[0] - v20[0] * v10[2];
 591         normal3f[2] = v20[0] * v10[1] - v20[1] * v10[0];
 592         // 12 multiply, 10 subtract
 593         tc10[1] = tc1[1] - tc0[1];
 594         tc20[1] = tc2[1] - tc0[1];
 595         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 596         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 597         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 598         tc10[0] = tc1[0] - tc0[0];
 599         tc20[0] = tc2[0] - tc0[0];
 600         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 601         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 602         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 603         // 12 multiply, 4 add, 6 subtract
 604         f = DotProduct(svector3f, normal3f);
 605         svector3f[0] -= f * normal3f[0];
 606         svector3f[1] -= f * normal3f[1];
 607         svector3f[2] -= f * normal3f[2];
 608         f = DotProduct(tvector3f, normal3f);
 609         tvector3f[0] -= f * normal3f[0];
 610         tvector3f[1] -= f * normal3f[1];
 611         tvector3f[2] -= f * normal3f[2];
 612         // if texture is mapped the wrong way (counterclockwise), the tangents
 613         // have to be flipped, this is detected by calculating a normal from the
 614         // two tangents, and seeing if it is opposite the surface normal
 615         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 616         CrossProduct(tvector3f, svector3f, tangentcross);
 617         if (DotProduct(tangentcross, normal3f) < 0)
 618         {
 619                 VectorNegate(svector3f, svector3f);
 620                 VectorNegate(tvector3f, tvector3f);
 621         }
 622 }
 623
 624 // warning: this is a very expensive function!
 625 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)
 626 {
 627         int i, tnum;
 628         float sdir[3], tdir[3], normal[3], *sv, *tv;
 629         const float *v0, *v1, *v2, *tc0, *tc1, *tc2, *n;
 630         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 631         const int *e;
 632         // clear the vectors
 633         memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 634         memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 635         // process each vertex of each triangle and accumulate the results
 636         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 637         {
 638                 v0 = vertex3f + e[0] * 3;
 639                 v1 = vertex3f + e[1] * 3;
 640                 v2 = vertex3f + e[2] * 3;
 641                 tc0 = texcoord2f + e[0] * 2;
 642                 tc1 = texcoord2f + e[1] * 2;
 643                 tc2 = texcoord2f + e[2] * 2;
 644
 645                 // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 646                 // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 647
 648                 // calculate the edge directions and surface normal
 649                 // 6 multiply, 9 subtract
 650                 VectorSubtract(v1, v0, v10);
 651                 VectorSubtract(v2, v0, v20);
 652                 normal[0] = v20[1] * v10[2] - v20[2] * v10[1];
 653                 normal[1] = v20[2] * v10[0] - v20[0] * v10[2];
 654                 normal[2] = v20[0] * v10[1] - v20[1] * v10[0];
 655
 656                 // calculate the tangents
 657                 // 12 multiply, 10 subtract
 658                 tc10[1] = tc1[1] - tc0[1];
 659                 tc20[1] = tc2[1] - tc0[1];
 660                 sdir[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 661                 sdir[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 662                 sdir[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 663                 tc10[0] = tc1[0] - tc0[0];
 664                 tc20[0] = tc2[0] - tc0[0];
 665                 tdir[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 666                 tdir[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 667                 tdir[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 668
 669                 // if texture is mapped the wrong way (counterclockwise), the tangents
 670                 // have to be flipped, this is detected by calculating a normal from the
 671                 // two tangents, and seeing if it is opposite the surface normal
 672                 // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 673                 CrossProduct(tdir, sdir, tangentcross);
 674                 if (DotProduct(tangentcross, normal) < 0)
 675                 {
 676                         VectorNegate(sdir, sdir);
 677                         VectorNegate(tdir, tdir);
 678                 }
 679
 680                 if (!areaweighting)
 681                 {
 682                         VectorNormalize(sdir);
 683                         VectorNormalize(tdir);
 684                 }
 685                 for (i = 0;i < 3;i++)
 686                 {
 687                         VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
 688                         VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
 689                 }
 690         }
 691         // make the tangents completely perpendicular to the surface normal, and
 692         // then normalize them
 693         // 16 assignments, 2 divide, 2 sqrt, 2 negates, 14 adds, 24 multiplies
 694         for (i = 0, sv = svector3f + 3 * firstvertex, tv = tvector3f + 3 * firstvertex, n = normal3f + 3 * firstvertex;i < numvertices;i++, sv += 3, tv += 3, n += 3)
 695         {
 696                 f = -DotProduct(sv, n);
 697                 VectorMA(sv, f, n, sv);
 698                 VectorNormalize(sv);
 699                 f = -DotProduct(tv, n);
 700                 VectorMA(tv, f, n, tv);
 701                 VectorNormalize(tv);
 702         }
 703 }
 704
 705 void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 706 {
 707         unsigned char *data;
 708         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));
 709         loadmodel->surfmesh.num_vertices = numvertices;
 710         loadmodel->surfmesh.num_triangles = numtriangles;
 711         if (loadmodel->surfmesh.num_vertices)
 712         {
 713                 loadmodel->surfmesh.data_vertex3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 714                 loadmodel->surfmesh.data_svector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 715                 loadmodel->surfmesh.data_tvector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 716                 loadmodel->surfmesh.data_normal3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
 717                 loadmodel->surfmesh.data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 718                 loadmodel->surfmesh.data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
 719                 if (vertexcolors)
 720                         loadmodel->surfmesh.data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * loadmodel->surfmesh.num_vertices;
 721                 if (lightmapoffsets)
 722                         loadmodel->surfmesh.data_lightmapoffsets = (int *)data, data += sizeof(int) * loadmodel->surfmesh.num_vertices;
 723         }
 724         if (loadmodel->surfmesh.num_triangles)
 725         {
 726                 loadmodel->surfmesh.data_element3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 727                 if (neighbors)
 728                         loadmodel->surfmesh.data_neighbor3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
 729         }
 730 }
 731
 732 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)
 733 {
 734         shadowmesh_t *newmesh;
 735         unsigned char *data;
 736         int size;
 737         size = sizeof(shadowmesh_t);
 738         size += maxverts * sizeof(float[3]);
 739         if (light)
 740                 size += maxverts * sizeof(float[11]);
 741         size += maxtriangles * sizeof(int[3]);
 742         if (neighbors)
 743                 size += maxtriangles * sizeof(int[3]);
 744         if (expandable)
 745                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 746         data = (unsigned char *)Mem_Alloc(mempool, size);
 747         newmesh = (shadowmesh_t *)data;data += sizeof(*newmesh);
 748         newmesh->map_diffuse = map_diffuse;
 749         newmesh->map_specular = map_specular;
 750         newmesh->map_normal = map_normal;
 751         newmesh->maxverts = maxverts;
 752         newmesh->maxtriangles = maxtriangles;
 753         newmesh->numverts = 0;
 754         newmesh->numtriangles = 0;
 755
 756         newmesh->vertex3f = (float *)data;data += maxverts * sizeof(float[3]);
 757         if (light)
 758         {
 759                 newmesh->svector3f = (float *)data;data += maxverts * sizeof(float[3]);
 760                 newmesh->tvector3f = (float *)data;data += maxverts * sizeof(float[3]);
 761                 newmesh->normal3f = (float *)data;data += maxverts * sizeof(float[3]);
 762                 newmesh->texcoord2f = (float *)data;data += maxverts * sizeof(float[2]);
 763         }
 764         newmesh->element3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 765         if (neighbors)
 766         {
 767                 newmesh->neighbor3i = (int *)data;data += maxtriangles * sizeof(int[3]);
 768         }
 769         if (expandable)
 770         {
 771                 newmesh->vertexhashtable = (shadowmeshvertexhash_t **)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 772                 newmesh->vertexhashentries = (shadowmeshvertexhash_t *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 773         }
 774         return newmesh;
 775 }
 776
 777 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 778 {
 779         shadowmesh_t *newmesh;
 780         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 781         newmesh->numverts = oldmesh->numverts;
 782         newmesh->numtriangles = oldmesh->numtriangles;
 783
 784         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 785         if (newmesh->svector3f && oldmesh->svector3f)
 786         {
 787                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 788                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 789                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 790                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 791         }
 792         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 793         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 794                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 795         return newmesh;
 796 }
 797
 798 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 799 {
 800         int hashindex, vnum;
 801         shadowmeshvertexhash_t *hash;
 802         // this uses prime numbers intentionally
 803         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 804         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 805         {
 806                 vnum = (hash - mesh->vertexhashentries);
 807                 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]))
 808                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 809                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 810                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 811                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 812                         return hash - mesh->vertexhashentries;
 813         }
 814         vnum = mesh->numverts++;
 815         hash = mesh->vertexhashentries + vnum;
 816         hash->next = mesh->vertexhashtable[hashindex];
 817         mesh->vertexhashtable[hashindex] = hash;
 818         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 819         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 820         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 821         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 822         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 823         return vnum;
 824 }
 825
 826 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 827 {
 828         if (mesh->numtriangles == 0)
 829         {
 830                 // set the properties on this empty mesh to be more favorable...
 831                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 832                 mesh->map_diffuse = map_diffuse;
 833                 mesh->map_specular = map_specular;
 834                 mesh->map_normal = map_normal;
 835         }
 836         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)
 837         {
 838                 if (mesh->next == NULL)
 839                         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);
 840                 mesh = mesh->next;
 841         }
 842         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 843         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 844         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 845         mesh->numtriangles++;
 846 }
 847
 848 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)
 849 {
 850         int i, j, e;
 851         float vbuf[3*14], *v;
 852         memset(vbuf, 0, sizeof(vbuf));
 853         for (i = 0;i < numtris;i++)
 854         {
 855                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 856                 {
 857                         e = *element3i++;
 858                         if (vertex3f)
 859                         {
 860                                 v[0] = vertex3f[e * 3 + 0];
 861                                 v[1] = vertex3f[e * 3 + 1];
 862                                 v[2] = vertex3f[e * 3 + 2];
 863                         }
 864                         if (svector3f)
 865                         {
 866                                 v[3] = svector3f[e * 3 + 0];
 867                                 v[4] = svector3f[e * 3 + 1];
 868                                 v[5] = svector3f[e * 3 + 2];
 869                         }
 870                         if (tvector3f)
 871                         {
 872                                 v[6] = tvector3f[e * 3 + 0];
 873                                 v[7] = tvector3f[e * 3 + 1];
 874                                 v[8] = tvector3f[e * 3 + 2];
 875                         }
 876                         if (normal3f)
 877                         {
 878                                 v[9] = normal3f[e * 3 + 0];
 879                                 v[10] = normal3f[e * 3 + 1];
 880                                 v[11] = normal3f[e * 3 + 2];
 881                         }
 882                         if (texcoord2f)
 883                         {
 884                                 v[12] = texcoord2f[e * 2 + 0];
 885                                 v[13] = texcoord2f[e * 2 + 1];
 886                         }
 887                 }
 888                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 889         }
 890 }
 891
 892 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)
 893 {
 894         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 895 }
 896
 897 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 898 {
 899         shadowmesh_t *mesh, *newmesh, *nextmesh;
 900         // reallocate meshs to conserve space
 901         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 902         {
 903                 nextmesh = mesh->next;
 904                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 905                 {
 906                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 907                         newmesh->next = firstmesh;
 908                         firstmesh = newmesh;
 909                 }
 910                 Mem_Free(mesh);
 911         }
 912         return firstmesh;
 913 }
 914
 915 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 916 {
 917         int i;
 918         shadowmesh_t *mesh;
 919         vec3_t nmins, nmaxs, ncenter, temp;
 920         float nradius2, dist2, *v;
 921         VectorClear(nmins);
 922         VectorClear(nmaxs);
 923         // calculate bbox
 924         for (mesh = firstmesh;mesh;mesh = mesh->next)
 925         {
 926                 if (mesh == firstmesh)
 927                 {
 928                         VectorCopy(mesh->vertex3f, nmins);
 929                         VectorCopy(mesh->vertex3f, nmaxs);
 930                 }
 931                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 932                 {
 933                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 934                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 935                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 936                 }
 937         }
 938         // calculate center and radius
 939         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 940         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 941         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 942         nradius2 = 0;
 943         for (mesh = firstmesh;mesh;mesh = mesh->next)
 944         {
 945                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 946                 {
 947                         VectorSubtract(v, ncenter, temp);
 948                         dist2 = DotProduct(temp, temp);
 949                         if (nradius2 < dist2)
 950                                 nradius2 = dist2;
 951                 }
 952         }
 953         // return data
 954         if (mins)
 955                 VectorCopy(nmins, mins);
 956         if (maxs)
 957                 VectorCopy(nmaxs, maxs);
 958         if (center)
 959                 VectorCopy(ncenter, center);
 960         if (radius)
 961                 *radius = sqrt(nradius2);
 962 }
 963
 964 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 965 {
 966         shadowmesh_t *nextmesh;
 967         for (;mesh;mesh = nextmesh)
 968         {
 969                 nextmesh = mesh->next;
 970                 Mem_Free(mesh);
 971         }
 972 }
 973
 974 static rtexture_t *GL_TextureForSkinLayer(const unsigned char *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 975 {
 976         int i;
 977         for (i = 0;i < width*height;i++)
 978                 if (((unsigned char *)&palette[in[i]])[3] > 0)
 979                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 980         return NULL;
 981 }
 982
 983 int Mod_LoadSkinFrame(skinframe_t *skinframe, const char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture)
 984 {
 985         imageskin_t s;
 986         memset(skinframe, 0, sizeof(*skinframe));
 987         if (cls.state == ca_dedicated)
 988                 return false;
 989         if (!image_loadskin(&s, basename))
 990                 return false;
 991         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 992         if (s.nmappixels != NULL)
 993                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 994         if (s.glosspixels != NULL)
 995                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 996         if (s.glowpixels != NULL && loadglowtexture)
 997                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 998         if (s.maskpixels != NULL)
 999                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
1000         if (loadpantsandshirt)
1001         {
1002                 if (s.pantspixels != NULL)
1003                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
1004                 if (s.shirtpixels != NULL)
1005                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
1006         }
1007         if (!skinframe->base)
1008                 skinframe->base = r_texture_notexture;
1009         if (!skinframe->nmap)
1010                 skinframe->nmap = r_texture_blanknormalmap;
1011         image_freeskin(&s);
1012         return true;
1013 }
1014
1015 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)
1016 {
1017         int i;
1018         unsigned char *temp1, *temp2;
1019         memset(skinframe, 0, sizeof(*skinframe));
1020         if (cls.state == ca_dedicated)
1021                 return false;
1022         if (!skindata)
1023                 return false;
1024         if (bitsperpixel == 32)
1025         {
1026                 if (r_shadow_bumpscale_basetexture.value > 0)
1027                 {
1028                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1029                         temp2 = temp1 + width * height * 4;
1030                         Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1031                         skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags | TEXF_ALPHA, NULL);
1032                         Mem_Free(temp1);
1033                 }
1034                 skinframe->base = skinframe->merged = R_LoadTexture2D(loadmodel->texturepool, basename, width, height, skindata, TEXTYPE_RGBA, textureflags, NULL);
1035                 if (textureflags & TEXF_ALPHA)
1036                 {
1037                         for (i = 3;i < width * height * 4;i += 4)
1038                                 if (skindata[i] < 255)
1039                                         break;
1040                         if (i < width * height * 4)
1041                         {
1042                                 unsigned char *fogpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 4);
1043                                 memcpy(fogpixels, skindata, width * height * 4);
1044                                 for (i = 0;i < width * height * 4;i += 4)
1045                                         fogpixels[i] = fogpixels[i+1] = fogpixels[i+2] = 255;
1046                                 skinframe->fog = R_LoadTexture2D(loadmodel->texturepool, va("%s_fog", basename), width, height, fogpixels, TEXTYPE_RGBA, textureflags, NULL);
1047                                 Mem_Free(fogpixels);
1048                         }
1049                 }
1050         }
1051         else if (bitsperpixel == 8)
1052         {
1053                 if (r_shadow_bumpscale_basetexture.value > 0)
1054                 {
1055                         temp1 = (unsigned char *)Mem_Alloc(loadmodel->mempool, width * height * 8);
1056                         temp2 = temp1 + width * height * 4;
1057                         if (bitsperpixel == 32)
1058                                 Image_HeightmapToNormalmap(skindata, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1059                         else
1060                         {
1061                                 // use either a custom palette or the quake palette
1062                                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette ? palette : palette_complete);
1063                                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
1064                         }
1065                         skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags | TEXF_ALPHA, NULL);
1066                         Mem_Free(temp1);
1067                 }
1068                 // use either a custom palette, or the quake palette
1069                 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
1070                 if (!palette && loadglowtexture)
1071                         skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
1072                 if (!palette && loadpantsandshirt)
1073                 {
1074                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
1075                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
1076                 }
1077                 if (skinframe->pants || skinframe->shirt)
1078                         skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename),loadglowtexture ? palette_nocolormapnofullbrights : palette_nocolormap, textureflags); // no special colors
1079                 if (textureflags & TEXF_ALPHA)
1080                 {
1081                         // if not using a custom alphapalette, use the quake one
1082                         if (!alphapalette)
1083                                 alphapalette = palette_alpha;
1084                         for (i = 0;i < width * height;i++)
1085                                 if (((unsigned char *)alphapalette)[skindata[i]*4+3] < 255)
1086                                         break;
1087                         if (i < width * height)
1088                                 skinframe->fog = GL_TextureForSkinLayer(skindata, width, height, va("%s_fog", basename), alphapalette, textureflags); // fog mask
1089                 }
1090         }
1091         else
1092                 return false;
1093         if (!skinframe->nmap)
1094                 skinframe->nmap = r_texture_blanknormalmap;
1095         return true;
1096 }
1097
1098 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)
1099 {
1100         float v[3], tc[3];
1101         v[0] = ix;
1102         v[1] = iy;
1103         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
1104                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
1105         else
1106                 v[2] = 0;
1107         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
1108         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
1109         texcoord2f[0] = tc[0];
1110         texcoord2f[1] = tc[1];
1111 }
1112
1113 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)
1114 {
1115         float vup[3], vdown[3], vleft[3], vright[3];
1116         float tcup[3], tcdown[3], tcleft[3], tcright[3];
1117         float sv[3], tv[3], nl[3];
1118         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
1119         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1120         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1121         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1122         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1123         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1124         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1125         VectorAdd(svector3f, sv, svector3f);
1126         VectorAdd(tvector3f, tv, tvector3f);
1127         VectorAdd(normal3f, nl, normal3f);
1128         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1129         VectorAdd(svector3f, sv, svector3f);
1130         VectorAdd(tvector3f, tv, tvector3f);
1131         VectorAdd(normal3f, nl, normal3f);
1132         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1133         VectorAdd(svector3f, sv, svector3f);
1134         VectorAdd(tvector3f, tv, tvector3f);
1135         VectorAdd(normal3f, nl, normal3f);
1136 }
1137
1138 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)
1139 {
1140         int x, y, ix, iy, *e;
1141         e = element3i;
1142         for (y = 0;y < height;y++)
1143         {
1144                 for (x = 0;x < width;x++)
1145                 {
1146                         e[0] = (y + 1) * (width + 1) + (x + 0);
1147                         e[1] = (y + 0) * (width + 1) + (x + 0);
1148                         e[2] = (y + 1) * (width + 1) + (x + 1);
1149                         e[3] = (y + 0) * (width + 1) + (x + 0);
1150                         e[4] = (y + 0) * (width + 1) + (x + 1);
1151                         e[5] = (y + 1) * (width + 1) + (x + 1);
1152                         e += 6;
1153                 }
1154         }
1155         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1156         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1157                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1158                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1159 }
1160
1161 skinfile_t *Mod_LoadSkinFiles(void)
1162 {
1163         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1164         char *text;
1165         const char *data;
1166         skinfile_t *skinfile = NULL, *first = NULL;
1167         skinfileitem_t *skinfileitem;
1168         char word[10][MAX_QPATH];
1169         overridetagnameset_t tagsets[MAX_SKINS];
1170         overridetagname_t tags[256];
1171
1172 /*
1173 sample file:
1174 U_bodyBox,models/players/Legoman/BikerA2.tga
1175 U_RArm,models/players/Legoman/BikerA1.tga
1176 U_LArm,models/players/Legoman/BikerA1.tga
1177 U_armor,common/nodraw
1178 U_sword,common/nodraw
1179 U_shield,common/nodraw
1180 U_homb,common/nodraw
1181 U_backpack,common/nodraw
1182 U_colcha,common/nodraw
1183 tag_head,
1184 tag_weapon,
1185 tag_torso,
1186 */
1187         memset(tagsets, 0, sizeof(tagsets));
1188         memset(word, 0, sizeof(word));
1189         for (i = 0;i < MAX_SKINS && (data = text = (char *)FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true, NULL));i++)
1190         {
1191                 numtags = 0;
1192
1193                 // If it's the first file we parse
1194                 if (skinfile == NULL)
1195                 {
1196                         skinfile = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1197                         first = skinfile;
1198                 }
1199                 else
1200                 {
1201                         skinfile->next = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
1202                         skinfile = skinfile->next;
1203                 }
1204                 skinfile->next = NULL;
1205
1206                 for(line = 0;;line++)
1207                 {
1208                         // parse line
1209                         if (!COM_ParseToken(&data, true))
1210                                 break;
1211                         if (!strcmp(com_token, "\n"))
1212                                 continue;
1213                         words = 0;
1214                         wordsoverflow = false;
1215                         do
1216                         {
1217                                 if (words < 10)
1218                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1219                                 else
1220                                         wordsoverflow = true;
1221                         }
1222                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1223                         if (wordsoverflow)
1224                         {
1225                                 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);
1226                                 continue;
1227                         }
1228                         // words is always >= 1
1229                         if (!strcmp(word[0], "replace"))
1230                         {
1231                                 if (words == 3)
1232                                 {
1233                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1234                                         skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1235                                         skinfileitem->next = skinfile->items;
1236                                         skinfile->items = skinfileitem;
1237                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1238                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1239                                 }
1240                                 else
1241                                         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]);
1242                         }
1243                         else if (words == 2 && !strcmp(word[1], ","))
1244                         {
1245                                 // tag name, like "tag_weapon,"
1246                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1247                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1248                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1249                                 numtags++;
1250                         }
1251                         else if (words == 3 && !strcmp(word[1], ","))
1252                         {
1253                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1254                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1255                                 skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
1256                                 skinfileitem->next = skinfile->items;
1257                                 skinfile->items = skinfileitem;
1258                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1259                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1260                         }
1261                         else
1262                                 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);
1263                 }
1264                 Mem_Free(text);
1265
1266                 if (numtags)
1267                 {
1268                         overridetagnameset_t *t;
1269                         t = tagsets + i;
1270                         t->num_overridetagnames = numtags;
1271                         t->data_overridetagnames = (overridetagname_t *)Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1272                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1273                         tagsetsused = true;
1274                 }
1275         }
1276         if (tagsetsused)
1277         {
1278                 loadmodel->data_overridetagnamesforskin = (overridetagnameset_t *)Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1279                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1280         }
1281         if (i)
1282                 loadmodel->numskins = i;
1283         return first;
1284 }
1285
1286 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1287 {
1288         skinfile_t *next;
1289         skinfileitem_t *skinfileitem, *nextitem;
1290         for (;skinfile;skinfile = next)
1291         {
1292                 next = skinfile->next;
1293                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1294                 {
1295                         nextitem = skinfileitem->next;
1296                         Mem_Free(skinfileitem);
1297                 }
1298                 Mem_Free(skinfile);
1299         }
1300 }
1301
1302 int Mod_CountSkinFiles(skinfile_t *skinfile)
1303 {
1304         int i;
1305         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1306         return i;
1307 }
1308
1309 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1310 {
1311         int i;
1312         double isnap = 1.0 / snap;
1313         for (i = 0;i < numvertices*numcomponents;i++)
1314                 vertices[i] = floor(vertices[i]*isnap)*snap;
1315 }
1316
1317 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1318 {
1319         int i, outtriangles;
1320         float d, edgedir[3], temp[3];
1321         // a degenerate triangle is one with no width (thickness, surface area)
1322         // these are characterized by having all 3 points colinear (along a line)
1323         // or having two points identical
1324         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1325         {
1326                 // calculate first edge
1327                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1328                 if (VectorLength2(edgedir) < 0.0001f)
1329                         continue; // degenerate first edge (no length)
1330                 VectorNormalize(edgedir);
1331                 // check if third point is on the edge (colinear)
1332                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1333                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1334                 if (VectorLength2(temp) < 0.0001f)
1335                         continue; // third point colinear with first edge
1336                 // valid triangle (no colinear points, no duplicate points)
1337                 VectorCopy(inelement3i, outelement3i);
1338                 outelement3i += 3;
1339                 outtriangles++;
1340         }
1341         return outtriangles;
1342 }
1343