model_shared.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // models.c -- model loading and caching
  21
  22 // models are the only shared resource between a client and server running
  23 // on the same machine.
  24
  25 #include "quakedef.h"
  26 #include "image.h"
  27 #include "r_shadow.h"
  28
  29 cvar_t r_mipskins = {CVAR_SAVE, "r_mipskins", "0"};
  30
  31 model_t *loadmodel;
  32
  33 // LordHavoc: was 512
  34 #define MAX_MOD_KNOWN (MAX_MODELS + 256)
  35 static model_t mod_known[MAX_MOD_KNOWN];
  36
  37 static void mod_start(void)
  38 {
  39         int i;
  40         for (i = 0;i < MAX_MOD_KNOWN;i++)
  41                 if (mod_known[i].name[0])
  42                         Mod_UnloadModel(&mod_known[i]);
  43         Mod_LoadModels();
  44 }
  45
  46 static void mod_shutdown(void)
  47 {
  48         int i;
  49         for (i = 0;i < MAX_MOD_KNOWN;i++)
  50                 if (mod_known[i].name[0])
  51                         Mod_UnloadModel(&mod_known[i]);
  52 }
  53
  54 static void mod_newmap(void)
  55 {
  56         msurface_t *surface;
  57         int i, surfacenum, ssize, tsize;
  58
  59         if (!cl_stainmaps_clearonload.integer)
  60                 return;
  61
  62         for (i = 0;i < MAX_MOD_KNOWN;i++)
  63         {
  64                 if (mod_known[i].name[0])
  65                 {
  66                         for (surfacenum = 0, surface = mod_known[i].data_surfaces;surfacenum < mod_known[i].num_surfaces;surfacenum++, surface++)
  67                         {
  68                                 if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
  69                                 {
  70                                         ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
  71                                         tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
  72                                         memset(surface->lightmapinfo->stainsamples, 255, ssize * tsize * 3);
  73                                         surface->cached_dlight = true;
  74                                 }
  75                         }
  76                 }
  77         }
  78 }
  79
  80 /*
  81 ===============
  82 Mod_Init
  83 ===============
  84 */
  85 static void Mod_Print(void);
  86 static void Mod_Precache (void);
  87 void Mod_Init (void)
  88 {
  89         Mod_BrushInit();
  90         Mod_AliasInit();
  91         Mod_SpriteInit();
  92
  93         Cvar_RegisterVariable(&r_mipskins);
  94         Cmd_AddCommand ("modellist", Mod_Print);
  95         Cmd_AddCommand ("modelprecache", Mod_Precache);
  96 }
  97
  98 void Mod_RenderInit(void)
  99 {
 100         R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
 101 }
 102
 103 void Mod_FreeModel (model_t *mod)
 104 {
 105         R_FreeTexturePool(&mod->texturepool);
 106         Mem_FreePool(&mod->mempool);
 107
 108         // clear the struct to make it available
 109         memset(mod, 0, sizeof(model_t));
 110 }
 111
 112 void Mod_UnloadModel (model_t *mod)
 113 {
 114         char name[MAX_QPATH];
 115         qboolean isworldmodel;
 116         qboolean used;
 117         strcpy(name, mod->name);
 118         isworldmodel = mod->isworldmodel;
 119         used = mod->used;
 120         Mod_FreeModel(mod);
 121         strcpy(mod->name, name);
 122         mod->isworldmodel = isworldmodel;
 123         mod->used = used;
 124         mod->loaded = false;
 125 }
 126
 127 /*
 128 ==================
 129 Mod_LoadModel
 130
 131 Loads a model
 132 ==================
 133 */
 134 model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 135 {
 136         int num;
 137         unsigned int crc;
 138         void *buf;
 139
 140         mod->used = true;
 141
 142         if (mod->name[0] == '*') // submodel
 143                 return mod;
 144
 145         crc = 0;
 146         buf = NULL;
 147         if (mod->isworldmodel != isworldmodel)
 148                 mod->loaded = false;
 149         if (!mod->loaded || checkdisk)
 150         {
 151                 if (checkdisk && mod->loaded)
 152                         Con_DPrintf("checking model %s\n", mod->name);
 153                 buf = FS_LoadFile (mod->name, tempmempool, false);
 154                 if (buf)
 155                 {
 156                         crc = CRC_Block(buf, fs_filesize);
 157                         if (mod->crc != crc)
 158                                 mod->loaded = false;
 159                 }
 160         }
 161         if (mod->loaded)
 162                 return mod; // already loaded
 163
 164         Con_DPrintf("loading model %s\n", mod->name);
 165         // LordHavoc: unload the existing model in this slot (if there is one)
 166         Mod_UnloadModel(mod);
 167
 168         // load the model
 169         mod->isworldmodel = isworldmodel;
 170         mod->used = true;
 171         mod->crc = crc;
 172         // errors can prevent the corresponding mod->loaded = true;
 173         mod->loaded = false;
 174
 175         // default model radius and bounding box (mainly for missing models)
 176         mod->radius = 16;
 177         VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
 178         VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
 179         VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
 180         VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
 181         VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
 182         VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 183
 184         // all models use memory, so allocate a memory pool
 185         mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 186         // all models load textures, so allocate a texture pool
 187         if (cls.state != ca_dedicated)
 188                 mod->texturepool = R_AllocTexturePool();
 189
 190         if (buf)
 191         {
 192                 char *bufend = buf + fs_filesize;
 193                 num = LittleLong(*((int *)buf));
 194                 // call the apropriate loader
 195                 loadmodel = mod;
 196                      if (!memcmp(buf, "IDPO", 4)) Mod_IDP0_Load(mod, buf, bufend);
 197                 else if (!memcmp(buf, "IDP2", 4)) Mod_IDP2_Load(mod, buf, bufend);
 198                 else if (!memcmp(buf, "IDP3", 4)) Mod_IDP3_Load(mod, buf, bufend);
 199                 else if (!memcmp(buf, "IDSP", 4)) Mod_IDSP_Load(mod, buf, bufend);
 200                 else if (!memcmp(buf, "IDS2", 4)) Mod_IDS2_Load(mod, buf, bufend);
 201                 else if (!memcmp(buf, "IBSP", 4)) Mod_IBSP_Load(mod, buf, bufend);
 202                 else if (!memcmp(buf, "ZYMOTICMODEL", 12)) Mod_ZYMOTICMODEL_Load(mod, buf, bufend);
 203                 else if (!memcmp(buf, "DARKPLACESMODEL", 16)) Mod_DARKPLACESMODEL_Load(mod, buf, bufend);
 204                 else if (strlen(mod->name) >= 4 && !strcmp(mod->name - 4, ".map")) Mod_MAP_Load(mod, buf, bufend);
 205                 else if (num == BSPVERSION || num == 30) Mod_Q1BSP_Load(mod, buf, bufend);
 206                 else Con_Printf("Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
 207                 Mem_Free(buf);
 208         }
 209         else if (crash)
 210         {
 211                 // LordHavoc: Sys_Error was *ANNOYING*
 212                 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
 213         }
 214
 215         // no errors occurred
 216         mod->loaded = true;
 217         return mod;
 218 }
 219
 220 /*
 221 ===================
 222 Mod_ClearAll
 223 ===================
 224 */
 225 void Mod_ClearAll(void)
 226 {
 227 }
 228
 229 void Mod_ClearUsed(void)
 230 {
 231         int i;
 232         model_t *mod;
 233
 234         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 235                 if (mod->name[0])
 236                         mod->used = false;
 237 }
 238
 239 void Mod_PurgeUnused(void)
 240 {
 241         int i;
 242         model_t *mod;
 243
 244         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 245                 if (mod->name[0])
 246                         if (!mod->used)
 247                                 Mod_FreeModel(mod);
 248 }
 249
 250 // only used during loading!
 251 void Mod_RemoveStaleWorldModels(model_t *skip)
 252 {
 253         int i;
 254         for (i = 0;i < MAX_MOD_KNOWN;i++)
 255                 if (mod_known[i].isworldmodel && skip != &mod_known[i])
 256                         Mod_UnloadModel(mod_known + i);
 257 }
 258
 259 void Mod_LoadModels(void)
 260 {
 261         int i;
 262         model_t *mod;
 263
 264         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 265                 if (mod->name[0])
 266                         if (mod->used)
 267                                 Mod_CheckLoaded(mod);
 268 }
 269
 270 /*
 271 ==================
 272 Mod_FindName
 273
 274 ==================
 275 */
 276 model_t *Mod_FindName(const char *name)
 277 {
 278         int i;
 279         model_t *mod, *freemod;
 280
 281         if (!name[0])
 282                 Host_Error ("Mod_ForName: NULL name");
 283
 284 // search the currently loaded models
 285         freemod = NULL;
 286         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 287         {
 288                 if (mod->name[0])
 289                 {
 290                         if (!strcmp (mod->name, name))
 291                         {
 292                                 mod->used = true;
 293                                 return mod;
 294                         }
 295                 }
 296                 else if (freemod == NULL)
 297                         freemod = mod;
 298         }
 299
 300         if (freemod)
 301         {
 302                 mod = freemod;
 303                 strcpy (mod->name, name);
 304                 mod->loaded = false;
 305                 mod->used = true;
 306                 return mod;
 307         }
 308
 309         Host_Error ("Mod_FindName: ran out of models\n");
 310         return NULL;
 311 }
 312
 313 /*
 314 ==================
 315 Mod_ForName
 316
 317 Loads in a model for the given name
 318 ==================
 319 */
 320 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
 321 {
 322         return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
 323 }
 324
 325 qbyte *mod_base;
 326
 327
 328 //=============================================================================
 329
 330 /*
 331 ================
 332 Mod_Print
 333 ================
 334 */
 335 static void Mod_Print(void)
 336 {
 337         int             i;
 338         model_t *mod;
 339
 340         Con_Print("Loaded models:\n");
 341         for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
 342                 if (mod->name[0])
 343                         Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
 344 }
 345
 346 /*
 347 ================
 348 Mod_Precache
 349 ================
 350 */
 351 static void Mod_Precache(void)
 352 {
 353         if (Cmd_Argc() == 2)
 354                 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
 355         else
 356                 Con_Print("usage: modelprecache <filename>\n");
 357 }
 358
 359 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
 360 {
 361         int i, count;
 362         qbyte *used;
 363         used = Mem_Alloc(tempmempool, numvertices);
 364         memset(used, 0, numvertices);
 365         for (i = 0;i < numelements;i++)
 366                 used[elements[i]] = 1;
 367         for (i = 0, count = 0;i < numvertices;i++)
 368                 remapvertices[i] = used[i] ? count++ : -1;
 369         Mem_Free(used);
 370         return count;
 371 }
 372
 373 #if 1
 374 // fast way, using an edge hash
 375 #define TRIANGLEEDGEHASH 8192
 376 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 377 {
 378         int i, j, p, e1, e2, *n, hashindex, count, match;
 379         const int *e;
 380         typedef struct edgehashentry_s
 381         {
 382                 struct edgehashentry_s *next;
 383                 int triangle;
 384                 int element[2];
 385         }
 386         edgehashentry_t;
 387         edgehashentry_t *edgehash[TRIANGLEEDGEHASH], *edgehashentries, edgehashentriesbuffer[TRIANGLEEDGEHASH*3], *hash;
 388         memset(edgehash, 0, sizeof(edgehash));
 389         edgehashentries = edgehashentriesbuffer;
 390         // if there are too many triangles for the stack array, allocate larger buffer
 391         if (numtriangles > TRIANGLEEDGEHASH)
 392                 edgehashentries = Mem_Alloc(tempmempool, numtriangles * 3 * sizeof(edgehashentry_t));
 393         // find neighboring triangles
 394         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 395         {
 396                 for (j = 0, p = 2;j < 3;p = j, j++)
 397                 {
 398                         e1 = e[p];
 399                         e2 = e[j];
 400                         // this hash index works for both forward and backward edges
 401                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 402                         hash = edgehashentries + i * 3 + j;
 403                         hash->next = edgehash[hashindex];
 404                         edgehash[hashindex] = hash;
 405                         hash->triangle = i;
 406                         hash->element[0] = e1;
 407                         hash->element[1] = e2;
 408                 }
 409         }
 410         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 411         {
 412                 for (j = 0, p = 2;j < 3;p = j, j++)
 413                 {
 414                         e1 = e[p];
 415                         e2 = e[j];
 416                         // this hash index works for both forward and backward edges
 417                         hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
 418                         count = 0;
 419                         match = -1;
 420                         for (hash = edgehash[hashindex];hash;hash = hash->next)
 421                         {
 422                                 if (hash->element[0] == e2 && hash->element[1] == e1)
 423                                 {
 424                                         if (hash->triangle != i)
 425                                                 match = hash->triangle;
 426                                         count++;
 427                                 }
 428                                 else if ((hash->element[0] == e1 && hash->element[1] == e2))
 429                                         count++;
 430                         }
 431                         // detect edges shared by three triangles and make them seams
 432                         if (count > 2)
 433                                 match = -1;
 434                         n[p] = match;
 435                 }
 436         }
 437         // free the allocated buffer
 438         if (edgehashentries != edgehashentriesbuffer)
 439                 Mem_Free(edgehashentries);
 440 }
 441 #else
 442 // very slow but simple way
 443 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
 444 {
 445         int i, match, count;
 446         count = 0;
 447         match = -1;
 448         for (i = 0;i < numtriangles;i++, elements += 3)
 449         {
 450                      if ((elements[0] == start && elements[1] == end)
 451                       || (elements[1] == start && elements[2] == end)
 452                       || (elements[2] == start && elements[0] == end))
 453                 {
 454                         if (i != ignore)
 455                                 match = i;
 456                         count++;
 457                 }
 458                 else if ((elements[1] == start && elements[0] == end)
 459                       || (elements[2] == start && elements[1] == end)
 460                       || (elements[0] == start && elements[2] == end))
 461                         count++;
 462         }
 463         // detect edges shared by three triangles and make them seams
 464         if (count > 2)
 465                 match = -1;
 466         return match;
 467 }
 468
 469 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
 470 {
 471         int i, *n;
 472         const int *e;
 473         for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
 474         {
 475                 n[0] = Mod_FindTriangleWithEdge(elements, numtriangles, e[1], e[0], i);
 476                 n[1] = Mod_FindTriangleWithEdge(elements, numtriangles, e[2], e[1], i);
 477                 n[2] = Mod_FindTriangleWithEdge(elements, numtriangles, e[0], e[2], i);
 478         }
 479 }
 480 #endif
 481
 482 void Mod_ValidateElements(const int *elements, int numtriangles, int numverts, const char *filename, int fileline)
 483 {
 484         int i;
 485         for (i = 0;i < numtriangles * 3;i++)
 486                 if ((unsigned int)elements[i] >= (unsigned int)numverts)
 487                         Con_Printf("Mod_ValidateElements: out of bounds element detected at %s:%d\n", filename, fileline);
 488 }
 489
 490 // warning: this is an expensive function!
 491 void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qboolean areaweighting)
 492 {
 493         int i, j;
 494         const int *element;
 495         float *vectorNormal;
 496         float areaNormal[3];
 497         // clear the vectors
 498         memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 499         // process each vertex of each triangle and accumulate the results
 500         // use area-averaging, to make triangles with a big area have a bigger
 501         // weighting on the vertex normal than triangles with a small area
 502         // to do so, just add the 'normals' together (the bigger the area
 503         // the greater the length of the normal is
 504         element = elements;
 505         for (i = 0; i < numtriangles; i++, element += 3)
 506         {
 507                 TriangleNormal(
 508                         vertex3f + element[0] * 3,
 509                         vertex3f + element[1] * 3,
 510                         vertex3f + element[2] * 3,
 511                         areaNormal
 512                         );
 513
 514                 if (!areaweighting)
 515                         VectorNormalize(areaNormal);
 516
 517                 for (j = 0;j < 3;j++)
 518                 {
 519                         vectorNormal = normal3f + element[j] * 3;
 520                         vectorNormal[0] += areaNormal[0];
 521                         vectorNormal[1] += areaNormal[1];
 522                         vectorNormal[2] += areaNormal[2];
 523                 }
 524         }
 525         // and just normalize the accumulated vertex normal in the end
 526         vectorNormal = normal3f + 3 * firstvertex;
 527         for (i = 0; i < numvertices; i++, vectorNormal += 3)
 528                 VectorNormalize(vectorNormal);
 529 }
 530
 531 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)
 532 {
 533         float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
 534         // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
 535         // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 536
 537         // 6 multiply, 9 subtract
 538         VectorSubtract(v1, v0, v10);
 539         VectorSubtract(v2, v0, v20);
 540         normal3f[0] = v10[1] * v20[2] - v10[2] * v20[1];
 541         normal3f[1] = v10[2] * v20[0] - v10[0] * v20[2];
 542         normal3f[2] = v10[0] * v20[1] - v10[1] * v20[0];
 543         // 12 multiply, 10 subtract
 544         tc10[1] = tc1[1] - tc0[1];
 545         tc20[1] = tc2[1] - tc0[1];
 546         svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
 547         svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
 548         svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
 549         tc10[0] = tc1[0] - tc0[0];
 550         tc20[0] = tc2[0] - tc0[0];
 551         tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
 552         tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
 553         tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 554         // 12 multiply, 4 add, 6 subtract
 555         f = DotProduct(svector3f, normal3f);
 556         svector3f[0] -= f * normal3f[0];
 557         svector3f[1] -= f * normal3f[1];
 558         svector3f[2] -= f * normal3f[2];
 559         f = DotProduct(tvector3f, normal3f);
 560         tvector3f[0] -= f * normal3f[0];
 561         tvector3f[1] -= f * normal3f[1];
 562         tvector3f[2] -= f * normal3f[2];
 563         // if texture is mapped the wrong way (counterclockwise), the tangents
 564         // have to be flipped, this is detected by calculating a normal from the
 565         // two tangents, and seeing if it is opposite the surface normal
 566         // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
 567         CrossProduct(tvector3f, svector3f, tangentcross);
 568         if (DotProduct(tangentcross, normal3f) < 0)
 569         {
 570                 VectorNegate(svector3f, svector3f);
 571                 VectorNegate(tvector3f, tvector3f);
 572         }
 573 }
 574
 575 // warning: this is a very expensive function!
 576 void Mod_BuildTextureVectorsAndNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const float *texcoord2f, const int *elements, float *svector3f, float *tvector3f, float *normal3f, qboolean areaweighting)
 577 {
 578         int i, tnum;
 579         float sdir[3], tdir[3], normal[3], *v;
 580         const int *e;
 581         // clear the vectors
 582         if (svector3f)
 583                 memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 584         if (tvector3f)
 585                 memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 586         if (normal3f)
 587                 memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
 588         // process each vertex of each triangle and accumulate the results
 589         for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
 590         {
 591                 Mod_BuildBumpVectors(vertex3f + e[0] * 3, vertex3f + e[1] * 3, vertex3f + e[2] * 3, texcoord2f + e[0] * 2, texcoord2f + e[1] * 2, texcoord2f + e[2] * 2, sdir, tdir, normal);
 592                 if (!areaweighting)
 593                 {
 594                         VectorNormalize(sdir);
 595                         VectorNormalize(tdir);
 596                         VectorNormalize(normal);
 597                 }
 598                 if (svector3f)
 599                         for (i = 0;i < 3;i++)
 600                                 VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
 601                 if (tvector3f)
 602                         for (i = 0;i < 3;i++)
 603                                 VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
 604                 if (normal3f)
 605                         for (i = 0;i < 3;i++)
 606                                 VectorAdd(normal3f + e[i]*3, normal, normal3f + e[i]*3);
 607         }
 608         // now we could divide the vectors by the number of averaged values on
 609         // each vertex...  but instead normalize them
 610         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 611         if (svector3f)
 612                 for (i = 0, v = svector3f + 3 * firstvertex;i < numvertices;i++, v += 3)
 613                         VectorNormalize(v);
 614         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 615         if (tvector3f)
 616                 for (i = 0, v = tvector3f + 3 * firstvertex;i < numvertices;i++, v += 3)
 617                         VectorNormalize(v);
 618         // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
 619         if (normal3f)
 620                 for (i = 0, v = normal3f + 3 * firstvertex;i < numvertices;i++, v += 3)
 621                         VectorNormalize(v);
 622 }
 623
 624 surfmesh_t *Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean detailtexcoords, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
 625 {
 626         surfmesh_t *mesh;
 627         qbyte *data;
 628         mesh = Mem_Alloc(mempool, sizeof(surfmesh_t) + numvertices * (3 + 3 + 3 + 3 + 2 + 2 + (detailtexcoords ? 2 : 0) + (vertexcolors ? 4 : 0)) * sizeof(float) + numvertices * (lightmapoffsets ? 1 : 0) * sizeof(int) + numtriangles * (3 + 3 + (neighbors ? 3 : 0)) * sizeof(int));
 629         mesh->num_vertices = numvertices;
 630         mesh->num_triangles = numtriangles;
 631         data = (qbyte *)(mesh + 1);
 632         if (mesh->num_vertices)
 633         {
 634                 mesh->data_vertex3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 635                 mesh->data_svector3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 636                 mesh->data_tvector3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 637                 mesh->data_normal3f = (float *)data, data += sizeof(float[3]) * mesh->num_vertices;
 638                 mesh->data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 639                 mesh->data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 640                 if (detailtexcoords)
 641                         mesh->data_texcoorddetail2f = (float *)data, data += sizeof(float[2]) * mesh->num_vertices;
 642                 if (vertexcolors)
 643                         mesh->data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * mesh->num_vertices;
 644                 if (lightmapoffsets)
 645                         mesh->data_lightmapoffsets = (int *)data, data += sizeof(int) * mesh->num_vertices;
 646         }
 647         if (mesh->num_triangles)
 648         {
 649                 mesh->data_element3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
 650                 mesh->data_element3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
 651                 if (neighbors)
 652                         mesh->data_neighbor3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
 653         }
 654         return mesh;
 655 }
 656
 657 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)
 658 {
 659         shadowmesh_t *newmesh;
 660         qbyte *data;
 661         int size;
 662         size = sizeof(shadowmesh_t);
 663         size += maxverts * sizeof(float[3]);
 664         if (light)
 665                 size += maxverts * sizeof(float[11]);
 666         size += maxtriangles * sizeof(int[3]);
 667         if (neighbors)
 668                 size += maxtriangles * sizeof(int[3]);
 669         if (expandable)
 670                 size += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *) + maxverts * sizeof(shadowmeshvertexhash_t);
 671         data = Mem_Alloc(mempool, size);
 672         newmesh = (void *)data;data += sizeof(*newmesh);
 673         newmesh->map_diffuse = map_diffuse;
 674         newmesh->map_specular = map_specular;
 675         newmesh->map_normal = map_normal;
 676         newmesh->maxverts = maxverts;
 677         newmesh->maxtriangles = maxtriangles;
 678         newmesh->numverts = 0;
 679         newmesh->numtriangles = 0;
 680
 681         newmesh->vertex3f = (void *)data;data += maxverts * sizeof(float[3]);
 682         if (light)
 683         {
 684                 newmesh->svector3f = (void *)data;data += maxverts * sizeof(float[3]);
 685                 newmesh->tvector3f = (void *)data;data += maxverts * sizeof(float[3]);
 686                 newmesh->normal3f = (void *)data;data += maxverts * sizeof(float[3]);
 687                 newmesh->texcoord2f = (void *)data;data += maxverts * sizeof(float[2]);
 688         }
 689         newmesh->element3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 690         if (neighbors)
 691         {
 692                 newmesh->neighbor3i = (void *)data;data += maxtriangles * sizeof(int[3]);
 693         }
 694         if (expandable)
 695         {
 696                 newmesh->vertexhashtable = (void *)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
 697                 newmesh->vertexhashentries = (void *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
 698         }
 699         return newmesh;
 700 }
 701
 702 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
 703 {
 704         shadowmesh_t *newmesh;
 705         newmesh = Mod_ShadowMesh_Alloc(mempool, oldmesh->numverts, oldmesh->numtriangles, oldmesh->map_diffuse, oldmesh->map_specular, oldmesh->map_normal, light, neighbors, false);
 706         newmesh->numverts = oldmesh->numverts;
 707         newmesh->numtriangles = oldmesh->numtriangles;
 708
 709         memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
 710         if (newmesh->svector3f && oldmesh->svector3f)
 711         {
 712                 memcpy(newmesh->svector3f, oldmesh->svector3f, oldmesh->numverts * sizeof(float[3]));
 713                 memcpy(newmesh->tvector3f, oldmesh->tvector3f, oldmesh->numverts * sizeof(float[3]));
 714                 memcpy(newmesh->normal3f, oldmesh->normal3f, oldmesh->numverts * sizeof(float[3]));
 715                 memcpy(newmesh->texcoord2f, oldmesh->texcoord2f, oldmesh->numverts * sizeof(float[2]));
 716         }
 717         memcpy(newmesh->element3i, oldmesh->element3i, oldmesh->numtriangles * sizeof(int[3]));
 718         if (newmesh->neighbor3i && oldmesh->neighbor3i)
 719                 memcpy(newmesh->neighbor3i, oldmesh->neighbor3i, oldmesh->numtriangles * sizeof(int[3]));
 720         return newmesh;
 721 }
 722
 723 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
 724 {
 725         int hashindex, vnum;
 726         shadowmeshvertexhash_t *hash;
 727         // this uses prime numbers intentionally
 728         hashindex = (unsigned int) (vertex14f[0] * 3 + vertex14f[1] * 5 + vertex14f[2] * 7) % SHADOWMESHVERTEXHASH;
 729         for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
 730         {
 731                 vnum = (hash - mesh->vertexhashentries);
 732                 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]))
 733                  && (mesh->svector3f == NULL || (mesh->svector3f[vnum * 3 + 0] == vertex14f[3] && mesh->svector3f[vnum * 3 + 1] == vertex14f[4] && mesh->svector3f[vnum * 3 + 2] == vertex14f[5]))
 734                  && (mesh->tvector3f == NULL || (mesh->tvector3f[vnum * 3 + 0] == vertex14f[6] && mesh->tvector3f[vnum * 3 + 1] == vertex14f[7] && mesh->tvector3f[vnum * 3 + 2] == vertex14f[8]))
 735                  && (mesh->normal3f == NULL || (mesh->normal3f[vnum * 3 + 0] == vertex14f[9] && mesh->normal3f[vnum * 3 + 1] == vertex14f[10] && mesh->normal3f[vnum * 3 + 2] == vertex14f[11]))
 736                  && (mesh->texcoord2f == NULL || (mesh->texcoord2f[vnum * 2 + 0] == vertex14f[12] && mesh->texcoord2f[vnum * 2 + 1] == vertex14f[13])))
 737                         return hash - mesh->vertexhashentries;
 738         }
 739         vnum = mesh->numverts++;
 740         hash = mesh->vertexhashentries + vnum;
 741         hash->next = mesh->vertexhashtable[hashindex];
 742         mesh->vertexhashtable[hashindex] = hash;
 743         if (mesh->vertex3f) {mesh->vertex3f[vnum * 3 + 0] = vertex14f[0];mesh->vertex3f[vnum * 3 + 1] = vertex14f[1];mesh->vertex3f[vnum * 3 + 2] = vertex14f[2];}
 744         if (mesh->svector3f) {mesh->svector3f[vnum * 3 + 0] = vertex14f[3];mesh->svector3f[vnum * 3 + 1] = vertex14f[4];mesh->svector3f[vnum * 3 + 2] = vertex14f[5];}
 745         if (mesh->tvector3f) {mesh->tvector3f[vnum * 3 + 0] = vertex14f[6];mesh->tvector3f[vnum * 3 + 1] = vertex14f[7];mesh->tvector3f[vnum * 3 + 2] = vertex14f[8];}
 746         if (mesh->normal3f) {mesh->normal3f[vnum * 3 + 0] = vertex14f[9];mesh->normal3f[vnum * 3 + 1] = vertex14f[10];mesh->normal3f[vnum * 3 + 2] = vertex14f[11];}
 747         if (mesh->texcoord2f) {mesh->texcoord2f[vnum * 2 + 0] = vertex14f[12];mesh->texcoord2f[vnum * 2 + 1] = vertex14f[13];}
 748         return vnum;
 749 }
 750
 751 void Mod_ShadowMesh_AddTriangle(mempool_t *mempool, shadowmesh_t *mesh, rtexture_t *map_diffuse, rtexture_t *map_specular, rtexture_t *map_normal, float *vertex14f)
 752 {
 753         if (mesh->numtriangles == 0)
 754         {
 755                 // set the properties on this empty mesh to be more favorable...
 756                 // (note: this case only occurs for the first triangle added to a new mesh chain)
 757                 mesh->map_diffuse = map_diffuse;
 758                 mesh->map_specular = map_specular;
 759                 mesh->map_normal = map_normal;
 760         }
 761         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)
 762         {
 763                 if (mesh->next == NULL)
 764                         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);
 765                 mesh = mesh->next;
 766         }
 767         mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 0);
 768         mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 1);
 769         mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex14f + 14 * 2);
 770         mesh->numtriangles++;
 771 }
 772
 773 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)
 774 {
 775         int i, j, e;
 776         float vbuf[3*14], *v;
 777         memset(vbuf, 0, sizeof(vbuf));
 778         for (i = 0;i < numtris;i++)
 779         {
 780                 for (j = 0, v = vbuf;j < 3;j++, v += 14)
 781                 {
 782                         e = *element3i++;
 783                         if (vertex3f)
 784                         {
 785                                 v[0] = vertex3f[e * 3 + 0];
 786                                 v[1] = vertex3f[e * 3 + 1];
 787                                 v[2] = vertex3f[e * 3 + 2];
 788                         }
 789                         if (svector3f)
 790                         {
 791                                 v[3] = svector3f[e * 3 + 0];
 792                                 v[4] = svector3f[e * 3 + 1];
 793                                 v[5] = svector3f[e * 3 + 2];
 794                         }
 795                         if (tvector3f)
 796                         {
 797                                 v[6] = tvector3f[e * 3 + 0];
 798                                 v[7] = tvector3f[e * 3 + 1];
 799                                 v[8] = tvector3f[e * 3 + 2];
 800                         }
 801                         if (normal3f)
 802                         {
 803                                 v[9] = normal3f[e * 3 + 0];
 804                                 v[10] = normal3f[e * 3 + 1];
 805                                 v[11] = normal3f[e * 3 + 2];
 806                         }
 807                         if (texcoord2f)
 808                         {
 809                                 v[12] = texcoord2f[e * 2 + 0];
 810                                 v[13] = texcoord2f[e * 2 + 1];
 811                         }
 812                 }
 813                 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
 814         }
 815 }
 816
 817 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)
 818 {
 819         return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
 820 }
 821
 822 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
 823 {
 824         shadowmesh_t *mesh, *newmesh, *nextmesh;
 825         // reallocate meshs to conserve space
 826         for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
 827         {
 828                 nextmesh = mesh->next;
 829                 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
 830                 {
 831                         newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
 832                         newmesh->next = firstmesh;
 833                         firstmesh = newmesh;
 834                 }
 835                 Mem_Free(mesh);
 836         }
 837         return firstmesh;
 838 }
 839
 840 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
 841 {
 842         int i;
 843         shadowmesh_t *mesh;
 844         vec3_t nmins, nmaxs, ncenter, temp;
 845         float nradius2, dist2, *v;
 846         // calculate bbox
 847         for (mesh = firstmesh;mesh;mesh = mesh->next)
 848         {
 849                 if (mesh == firstmesh)
 850                 {
 851                         VectorCopy(mesh->vertex3f, nmins);
 852                         VectorCopy(mesh->vertex3f, nmaxs);
 853                 }
 854                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 855                 {
 856                         if (nmins[0] > v[0]) nmins[0] = v[0];if (nmaxs[0] < v[0]) nmaxs[0] = v[0];
 857                         if (nmins[1] > v[1]) nmins[1] = v[1];if (nmaxs[1] < v[1]) nmaxs[1] = v[1];
 858                         if (nmins[2] > v[2]) nmins[2] = v[2];if (nmaxs[2] < v[2]) nmaxs[2] = v[2];
 859                 }
 860         }
 861         // calculate center and radius
 862         ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
 863         ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
 864         ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
 865         nradius2 = 0;
 866         for (mesh = firstmesh;mesh;mesh = mesh->next)
 867         {
 868                 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
 869                 {
 870                         VectorSubtract(v, ncenter, temp);
 871                         dist2 = DotProduct(temp, temp);
 872                         if (nradius2 < dist2)
 873                                 nradius2 = dist2;
 874                 }
 875         }
 876         // return data
 877         if (mins)
 878                 VectorCopy(nmins, mins);
 879         if (maxs)
 880                 VectorCopy(nmaxs, maxs);
 881         if (center)
 882                 VectorCopy(ncenter, center);
 883         if (radius)
 884                 *radius = sqrt(nradius2);
 885 }
 886
 887 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
 888 {
 889         shadowmesh_t *nextmesh;
 890         for (;mesh;mesh = nextmesh)
 891         {
 892                 nextmesh = mesh->next;
 893                 Mem_Free(mesh);
 894         }
 895 }
 896
 897 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
 898 {
 899         int i;
 900         for (i = 0;i < width*height;i++)
 901                 if (((qbyte *)&palette[in[i]])[3] > 0)
 902                         return R_LoadTexture2D (loadmodel->texturepool, name, width, height, in, TEXTYPE_PALETTE, textureflags, palette);
 903         return NULL;
 904 }
 905
 906 static int detailtexturecycle = 0;
 907 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture)
 908 {
 909         imageskin_t s;
 910         memset(skinframe, 0, sizeof(*skinframe));
 911         if (!image_loadskin(&s, basename))
 912                 return false;
 913         if (usedetailtexture)
 914                 skinframe->detail = r_texture_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 915         skinframe->base = R_LoadTexture2D (loadmodel->texturepool, basename, s.basepixels_width, s.basepixels_height, s.basepixels, TEXTYPE_RGBA, textureflags, NULL);
 916         if (s.nmappixels != NULL)
 917                 skinframe->nmap = R_LoadTexture2D (loadmodel->texturepool, va("%s_nmap", basename), s.nmappixels_width, s.nmappixels_height, s.nmappixels, TEXTYPE_RGBA, textureflags, NULL);
 918         if (s.glosspixels != NULL)
 919                 skinframe->gloss = R_LoadTexture2D (loadmodel->texturepool, va("%s_gloss", basename), s.glosspixels_width, s.glosspixels_height, s.glosspixels, TEXTYPE_RGBA, textureflags, NULL);
 920         if (s.glowpixels != NULL && loadglowtexture)
 921                 skinframe->glow = R_LoadTexture2D (loadmodel->texturepool, va("%s_glow", basename), s.glowpixels_width, s.glowpixels_height, s.glowpixels, TEXTYPE_RGBA, textureflags, NULL);
 922         if (s.maskpixels != NULL)
 923                 skinframe->fog = R_LoadTexture2D (loadmodel->texturepool, va("%s_mask", basename), s.maskpixels_width, s.maskpixels_height, s.maskpixels, TEXTYPE_RGBA, textureflags, NULL);
 924         if (loadpantsandshirt)
 925         {
 926                 if (s.pantspixels != NULL)
 927                         skinframe->pants = R_LoadTexture2D (loadmodel->texturepool, va("%s_pants", basename), s.pantspixels_width, s.pantspixels_height, s.pantspixels, TEXTYPE_RGBA, textureflags, NULL);
 928                 if (s.shirtpixels != NULL)
 929                         skinframe->shirt = R_LoadTexture2D (loadmodel->texturepool, va("%s_shirt", basename), s.shirtpixels_width, s.shirtpixels_height, s.shirtpixels, TEXTYPE_RGBA, textureflags, NULL);
 930         }
 931         image_freeskin(&s);
 932         return true;
 933 }
 934
 935 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int usedetailtexture, int loadglowtexture, qbyte *skindata, int width, int height)
 936 {
 937         qbyte *temp1, *temp2;
 938         memset(skinframe, 0, sizeof(*skinframe));
 939         if (!skindata)
 940                 return false;
 941         if (usedetailtexture)
 942                 skinframe->detail = r_texture_detailtextures[(detailtexturecycle++) % NUM_DETAILTEXTURES];
 943         if (r_shadow_bumpscale_basetexture.value > 0)
 944         {
 945                 temp1 = Mem_Alloc(loadmodel->mempool, width * height * 8);
 946                 temp2 = temp1 + width * height * 4;
 947                 Image_Copy8bitRGBA(skindata, temp1, width * height, palette_nofullbrights);
 948                 Image_HeightmapToNormalmap(temp1, temp2, width, height, false, r_shadow_bumpscale_basetexture.value);
 949                 skinframe->nmap = R_LoadTexture2D(loadmodel->texturepool, va("%s_nmap", basename), width, height, temp2, TEXTYPE_RGBA, textureflags, NULL);
 950                 Mem_Free(temp1);
 951         }
 952         if (loadglowtexture)
 953         {
 954                 skinframe->glow = GL_TextureForSkinLayer(skindata, width, height, va("%s_glow", basename), palette_onlyfullbrights, textureflags); // glow
 955                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_nofullbrights, textureflags); // all but fullbrights
 956                 if (loadpantsandshirt)
 957                 {
 958                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 959                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 960                         if (skinframe->pants || skinframe->shirt)
 961                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormapnofullbrights, textureflags); // no special colors
 962                 }
 963         }
 964         else
 965         {
 966                 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
 967                 if (loadpantsandshirt)
 968                 {
 969                         skinframe->pants = GL_TextureForSkinLayer(skindata, width, height, va("%s_pants", basename), palette_pantsaswhite, textureflags); // pants
 970                         skinframe->shirt = GL_TextureForSkinLayer(skindata, width, height, va("%s_shirt", basename), palette_shirtaswhite, textureflags); // shirt
 971                         if (skinframe->pants || skinframe->shirt)
 972                                 skinframe->base = GL_TextureForSkinLayer(skindata, width, height, va("%s_nospecial", basename), palette_nocolormap, textureflags); // no pants or shirt
 973                 }
 974         }
 975         return true;
 976 }
 977
 978 void Mod_GetTerrainVertex3fTexCoord2fFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
 979 {
 980         float v[3], tc[3];
 981         v[0] = ix;
 982         v[1] = iy;
 983         if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
 984                 v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
 985         else
 986                 v[2] = 0;
 987         Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
 988         Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
 989         texcoord2f[0] = tc[0];
 990         texcoord2f[1] = tc[1];
 991 }
 992
 993 void Mod_GetTerrainVertexFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
 994 {
 995         float vup[3], vdown[3], vleft[3], vright[3];
 996         float tcup[3], tcdown[3], tcleft[3], tcright[3];
 997         float sv[3], tv[3], nl[3];
 998         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
 999         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
1000         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
1001         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
1002         Mod_GetTerrainVertex3fTexCoord2fFromRGBA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
1003         Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
1004         Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
1005         VectorAdd(svector3f, sv, svector3f);
1006         VectorAdd(tvector3f, tv, tvector3f);
1007         VectorAdd(normal3f, nl, normal3f);
1008         Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
1009         VectorAdd(svector3f, sv, svector3f);
1010         VectorAdd(tvector3f, tv, tvector3f);
1011         VectorAdd(normal3f, nl, normal3f);
1012         Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
1013         VectorAdd(svector3f, sv, svector3f);
1014         VectorAdd(tvector3f, tv, tvector3f);
1015         VectorAdd(normal3f, nl, normal3f);
1016 }
1017
1018 void Mod_ConstructTerrainPatchFromRGBA(const qbyte *imagepixels, int imagewidth, int imageheight, int x1, int y1, int width, int height, int *element3i, int *neighbor3i, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
1019 {
1020         int x, y, ix, iy, *e;
1021         e = element3i;
1022         for (y = 0;y < height;y++)
1023         {
1024                 for (x = 0;x < width;x++)
1025                 {
1026                         e[0] = (y + 1) * (width + 1) + (x + 0);
1027                         e[1] = (y + 0) * (width + 1) + (x + 0);
1028                         e[2] = (y + 1) * (width + 1) + (x + 1);
1029                         e[3] = (y + 0) * (width + 1) + (x + 0);
1030                         e[4] = (y + 0) * (width + 1) + (x + 1);
1031                         e[5] = (y + 1) * (width + 1) + (x + 1);
1032                         e += 6;
1033                 }
1034         }
1035         Mod_BuildTriangleNeighbors(neighbor3i, element3i, width*height*2);
1036         for (y = 0, iy = y1;y < height + 1;y++, iy++)
1037                 for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
1038                         Mod_GetTerrainVertexFromRGBA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
1039 }
1040
1041 skinfile_t *Mod_LoadSkinFiles(void)
1042 {
1043         int i, words, numtags, line, tagsetsused = false, wordsoverflow;
1044         char *text;
1045         const char *data;
1046         skinfile_t *skinfile = NULL, *first = NULL;
1047         skinfileitem_t *skinfileitem;
1048         char word[10][MAX_QPATH];
1049         overridetagnameset_t tagsets[MAX_SKINS];
1050         overridetagname_t tags[256];
1051
1052 /*
1053 sample file:
1054 U_bodyBox,models/players/Legoman/BikerA2.tga
1055 U_RArm,models/players/Legoman/BikerA1.tga
1056 U_LArm,models/players/Legoman/BikerA1.tga
1057 U_armor,common/nodraw
1058 U_sword,common/nodraw
1059 U_shield,common/nodraw
1060 U_homb,common/nodraw
1061 U_backpack,common/nodraw
1062 U_colcha,common/nodraw
1063 tag_head,
1064 tag_weapon,
1065 tag_torso,
1066 */
1067         memset(tagsets, 0, sizeof(tagsets));
1068         memset(word, 0, sizeof(word));
1069         for (i = 0;i < MAX_SKINS && (data = text = FS_LoadFile(va("%s_%i.skin", loadmodel->name, i), tempmempool, true));i++)
1070         {
1071                 numtags = 0;
1072
1073                 // If it's the first file we parse
1074                 if (skinfile == NULL)
1075                 {
1076                         skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1077                         first = skinfile;
1078                 }
1079                 else
1080                 {
1081                         skinfile->next = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1082                         skinfile = skinfile->next;
1083                 }
1084                 skinfile->next = NULL;
1085
1086                 for(line = 0;;line++)
1087                 {
1088                         // parse line
1089                         if (!COM_ParseToken(&data, true))
1090                                 break;
1091                         if (!strcmp(com_token, "\n"))
1092                                 continue;
1093                         words = 0;
1094                         wordsoverflow = false;
1095                         do
1096                         {
1097                                 if (words < 10)
1098                                         strlcpy(word[words++], com_token, sizeof (word[0]));
1099                                 else
1100                                         wordsoverflow = true;
1101                         }
1102                         while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
1103                         if (wordsoverflow)
1104                         {
1105                                 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);
1106                                 continue;
1107                         }
1108                         // words is always >= 1
1109                         if (!strcmp(word[0], "replace"))
1110                         {
1111                                 if (words == 3)
1112                                 {
1113                                         Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
1114                                         skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1115                                         skinfileitem->next = skinfile->items;
1116                                         skinfile->items = skinfileitem;
1117                                         strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
1118                                         strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1119                                 }
1120                                 else
1121                                         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]);
1122                         }
1123                         else if (words == 2 && !strcmp(word[1], ","))
1124                         {
1125                                 // tag name, like "tag_weapon,"
1126                                 Con_DPrintf("Mod_LoadSkinFiles: parsed tag #%i \"%s\"\n", numtags, word[0]);
1127                                 memset(tags + numtags, 0, sizeof(tags[numtags]));
1128                                 strlcpy (tags[numtags].name, word[0], sizeof (tags[numtags].name));
1129                                 numtags++;
1130                         }
1131                         else if (words == 3 && !strcmp(word[1], ","))
1132                         {
1133                                 // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
1134                                 Con_DPrintf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
1135                                 skinfileitem = Mem_Alloc(tempmempool, sizeof(skinfileitem_t));
1136                                 skinfileitem->next = skinfile->items;
1137                                 skinfile->items = skinfileitem;
1138                                 strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
1139                                 strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
1140                         }
1141                         else
1142                                 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);
1143                 }
1144                 Mem_Free(text);
1145
1146                 if (numtags)
1147                 {
1148                         overridetagnameset_t *t;
1149                         t = tagsets + i;
1150                         t->num_overridetagnames = numtags;
1151                         t->data_overridetagnames = Mem_Alloc(loadmodel->mempool, t->num_overridetagnames * sizeof(overridetagname_t));
1152                         memcpy(t->data_overridetagnames, tags, t->num_overridetagnames * sizeof(overridetagname_t));
1153                         tagsetsused = true;
1154                 }
1155         }
1156         if (tagsetsused)
1157         {
1158                 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1159                 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1160         }
1161         if (i)
1162                 loadmodel->numskins = i;
1163         return first;
1164 }
1165
1166 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1167 {
1168         skinfile_t *next;
1169         skinfileitem_t *skinfileitem, *nextitem;
1170         for (;skinfile;skinfile = next)
1171         {
1172                 next = skinfile->next;
1173                 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1174                 {
1175                         nextitem = skinfileitem->next;
1176                         Mem_Free(skinfileitem);
1177                 }
1178                 Mem_Free(skinfile);
1179         }
1180 }
1181
1182 int Mod_CountSkinFiles(skinfile_t *skinfile)
1183 {
1184         int i;
1185         for (i = 0;skinfile;skinfile = skinfile->next, i++);
1186         return i;
1187 }
1188
1189 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1190 {
1191         int i;
1192         double isnap = 1.0 / snap;
1193         for (i = 0;i < numvertices*numcomponents;i++)
1194                 vertices[i] = floor(vertices[i]*isnap)*snap;
1195 }
1196
1197 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
1198 {
1199         int i, outtriangles;
1200         float d, edgedir[3], temp[3];
1201         // a degenerate triangle is one with no width (thickness, surface area)
1202         // these are characterized by having all 3 points colinear (along a line)
1203         // or having two points identical
1204         for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
1205         {
1206                 // calculate first edge
1207                 VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir);
1208                 if (VectorLength2(edgedir) < 0.0001f)
1209                         continue; // degenerate first edge (no length)
1210                 VectorNormalize(edgedir);
1211                 // check if third point is on the edge (colinear)
1212                 d = -DotProduct(vertex3f + inelement3i[2] * 3, edgedir);
1213                 VectorMA(vertex3f + inelement3i[2] * 3, d, edgedir, temp);
1214                 if (VectorLength2(temp) < 0.0001f)
1215                         continue; // third point colinear with first edge
1216                 // valid triangle (no colinear points, no duplicate points)
1217                 VectorCopy(inelement3i, outelement3i);
1218                 outelement3i += 3;
1219                 outtriangles++;
1220         }
1221         return outtriangles;
1222 }
1223