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