2 Copyright (C) 1996-1997 Id Software, Inc.
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.
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.
13 See the GNU General Public License for more details.
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.
20 // models.c -- model loading and caching
22 // models are the only shared resource between a client and server running
23 // on the same machine.
29 cvar_t r_mipskins = {CVAR_SAVE, "r_mipskins", "0"};
34 #define MAX_MOD_KNOWN (MAX_MODELS + 256)
35 static model_t mod_known[MAX_MOD_KNOWN];
37 static void mod_start(void)
40 for (i = 0;i < MAX_MOD_KNOWN;i++)
41 if (mod_known[i].name[0])
42 Mod_UnloadModel(&mod_known[i]);
46 static void mod_shutdown(void)
49 for (i = 0;i < MAX_MOD_KNOWN;i++)
50 if (mod_known[i].name[0])
51 Mod_UnloadModel(&mod_known[i]);
54 static void mod_newmap(void)
57 int i, surfacenum, ssize, tsize;
59 if (!cl_stainmaps_clearonload.integer)
62 for (i = 0;i < MAX_MOD_KNOWN;i++)
64 if (mod_known[i].name[0])
66 for (surfacenum = 0, surface = mod_known[i].data_surfaces;surfacenum < mod_known[i].num_surfaces;surfacenum++, surface++)
68 if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
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;
85 static void Mod_Print(void);
86 static void Mod_Precache (void);
93 Cvar_RegisterVariable(&r_mipskins);
94 Cmd_AddCommand ("modellist", Mod_Print);
95 Cmd_AddCommand ("modelprecache", Mod_Precache);
98 void Mod_RenderInit(void)
100 R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap);
103 void Mod_FreeModel (model_t *mod)
105 R_FreeTexturePool(&mod->texturepool);
106 Mem_FreePool(&mod->mempool);
108 // clear the struct to make it available
109 memset(mod, 0, sizeof(model_t));
112 void Mod_UnloadModel (model_t *mod)
114 char name[MAX_QPATH];
115 qboolean isworldmodel;
117 strcpy(name, mod->name);
118 isworldmodel = mod->isworldmodel;
121 strcpy(mod->name, name);
122 mod->isworldmodel = isworldmodel;
134 model_t *Mod_LoadModel(model_t *mod, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
142 if (mod->name[0] == '*') // submodel
147 if (mod->isworldmodel != isworldmodel)
149 if (!mod->loaded || checkdisk)
151 if (checkdisk && mod->loaded)
152 Con_DPrintf("checking model %s\n", mod->name);
153 buf = FS_LoadFile (mod->name, tempmempool, false);
156 crc = CRC_Block(buf, fs_filesize);
162 return mod; // already loaded
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);
169 mod->isworldmodel = isworldmodel;
172 // errors can prevent the corresponding mod->loaded = true;
175 // default model radius and bounding box (mainly for missing models)
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);
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();
192 char *bufend = (char *)buf + fs_filesize;
193 num = LittleLong(*((int *)buf));
194 // call the apropriate loader
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);
213 // LordHavoc: Sys_Error was *ANNOYING*
214 Con_Printf ("Mod_LoadModel: %s not found\n", mod->name);
217 // no errors occurred
227 void Mod_ClearAll(void)
231 void Mod_ClearUsed(void)
236 for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
241 void Mod_PurgeUnused(void)
246 for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
252 // only used during loading!
253 void Mod_RemoveStaleWorldModels(model_t *skip)
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);
261 void Mod_LoadModels(void)
266 for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
269 Mod_CheckLoaded(mod);
278 model_t *Mod_FindName(const char *name)
281 model_t *mod, *freemod;
284 Host_Error ("Mod_ForName: NULL name");
286 // search the currently loaded models
288 for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
292 if (!strcmp (mod->name, name))
298 else if (freemod == NULL)
305 strcpy (mod->name, name);
311 Host_Error ("Mod_FindName: ran out of models\n");
319 Loads in a model for the given name
322 model_t *Mod_ForName(const char *name, qboolean crash, qboolean checkdisk, qboolean isworldmodel)
324 return Mod_LoadModel(Mod_FindName(name), crash, checkdisk, isworldmodel);
330 //=============================================================================
337 static void Mod_Print(void)
342 Con_Print("Loaded models:\n");
343 for (i = 0, mod = mod_known;i < MAX_MOD_KNOWN;i++, mod++)
345 Con_Printf("%4iK %s\n", mod->mempool ? (mod->mempool->totalsize + 1023) / 1024 : 0, mod->name);
353 static void Mod_Precache(void)
356 Mod_ForName(Cmd_Argv(1), false, true, cl.worldmodel && !strcasecmp(Cmd_Argv(1), cl.worldmodel->name));
358 Con_Print("usage: modelprecache <filename>\n");
361 int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
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;
376 // fast way, using an edge hash
377 #define TRIANGLEEDGEHASH 8192
378 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
380 int i, j, p, e1, e2, *n, hashindex, count, match;
382 typedef struct edgehashentry_s
384 struct edgehashentry_s *next;
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)
398 for (j = 0, p = 2;j < 3;p = j, 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;
408 hash->element[0] = e1;
409 hash->element[1] = e2;
412 for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
414 for (j = 0, p = 2;j < 3;p = j, j++)
418 // this hash index works for both forward and backward edges
419 hashindex = (unsigned int)(e1 + e2) % TRIANGLEEDGEHASH;
422 for (hash = edgehash[hashindex];hash;hash = hash->next)
424 if (hash->element[0] == e2 && hash->element[1] == e1)
426 if (hash->triangle != i)
427 match = hash->triangle;
430 else if ((hash->element[0] == e1 && hash->element[1] == e2))
433 // detect edges shared by three triangles and make them seams
439 // free the allocated buffer
440 if (edgehashentries != edgehashentriesbuffer)
441 Mem_Free(edgehashentries);
444 // very slow but simple way
445 static int Mod_FindTriangleWithEdge(const int *elements, int numtriangles, int start, int end, int ignore)
450 for (i = 0;i < numtriangles;i++, elements += 3)
452 if ((elements[0] == start && elements[1] == end)
453 || (elements[1] == start && elements[2] == end)
454 || (elements[2] == start && elements[0] == end))
460 else if ((elements[1] == start && elements[0] == end)
461 || (elements[2] == start && elements[1] == end)
462 || (elements[0] == start && elements[2] == end))
465 // detect edges shared by three triangles and make them seams
471 void Mod_BuildTriangleNeighbors(int *neighbors, const int *elements, int numtriangles)
475 for (i = 0, e = elements, n = neighbors;i < numtriangles;i++, e += 3, n += 3)
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);
484 void Mod_ValidateElements(int *elements, int numtriangles, int numverts, const char *filename, int fileline)
486 int i, warned = false;
487 for (i = 0;i < numtriangles * 3;i++)
489 if ((unsigned int)elements[i] >= (unsigned int)numverts)
494 Con_Printf("Mod_ValidateElements: out of bounds elements detected at %s:%d\n", filename, fileline);
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)
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
516 for (i = 0; i < numtriangles; i++, element += 3)
519 vertex3f + element[0] * 3,
520 vertex3f + element[1] * 3,
521 vertex3f + element[2] * 3,
526 VectorNormalize(areaNormal);
528 for (j = 0;j < 3;j++)
530 vectorNormal = normal3f + element[j] * 3;
531 vectorNormal[0] += areaNormal[0];
532 vectorNormal[1] += areaNormal[1];
533 vectorNormal[2] += areaNormal[2];
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);
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)
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
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)
581 VectorNegate(svector3f, svector3f);
582 VectorNegate(tvector3f, tvector3f);
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)
590 float sdir[3], tdir[3], normal[3], *v;
594 memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
596 memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
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)
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);
605 VectorNormalize(sdir);
606 VectorNormalize(tdir);
607 VectorNormalize(normal);
610 for (i = 0;i < 3;i++)
611 VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
613 for (i = 0;i < 3;i++)
614 VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
616 for (i = 0;i < 3;i++)
617 VectorAdd(normal3f + e[i]*3, normal, normal3f + e[i]*3);
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
623 for (i = 0, v = svector3f + 3 * firstvertex;i < numvertices;i++, v += 3)
625 // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
627 for (i = 0, v = tvector3f + 3 * firstvertex;i < numvertices;i++, v += 3)
629 // 4 assignments, 1 divide, 1 sqrt, 2 adds, 6 multiplies
631 for (i = 0, v = normal3f + 3 * firstvertex;i < numvertices;i++, v += 3)
635 surfmesh_t *Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qboolean lightmapoffsets, qboolean vertexcolors, qboolean neighbors)
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)
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;
652 mesh->data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * mesh->num_vertices;
654 mesh->data_lightmapoffsets = (int *)data, data += sizeof(int) * mesh->num_vertices;
656 if (mesh->num_triangles)
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;
661 mesh->data_neighbor3i = (int *)data, data += sizeof(int[3]) * mesh->num_triangles;
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)
668 shadowmesh_t *newmesh;
671 size = sizeof(shadowmesh_t);
672 size += maxverts * sizeof(float[3]);
674 size += maxverts * sizeof(float[11]);
675 size += maxtriangles * sizeof(int[3]);
677 size += maxtriangles * sizeof(int[3]);
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;
690 newmesh->vertex3f = (void *)data;data += maxverts * sizeof(float[3]);
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]);
698 newmesh->element3i = (void *)data;data += maxtriangles * sizeof(int[3]);
701 newmesh->neighbor3i = (void *)data;data += maxtriangles * sizeof(int[3]);
705 newmesh->vertexhashtable = (void *)data;data += SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *);
706 newmesh->vertexhashentries = (void *)data;data += maxverts * sizeof(shadowmeshvertexhash_t);
711 shadowmesh_t *Mod_ShadowMesh_ReAlloc(mempool_t *mempool, shadowmesh_t *oldmesh, int light, int neighbors)
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;
718 memcpy(newmesh->vertex3f, oldmesh->vertex3f, oldmesh->numverts * sizeof(float[3]));
719 if (newmesh->svector3f && oldmesh->svector3f)
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]));
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]));
732 int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, float *vertex14f)
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)
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;
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];}
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)
762 if (mesh->numtriangles == 0)
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;
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)
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);
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++;
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)
785 float vbuf[3*14], *v;
786 memset(vbuf, 0, sizeof(vbuf));
787 for (i = 0;i < numtris;i++)
789 for (j = 0, v = vbuf;j < 3;j++, v += 14)
794 v[0] = vertex3f[e * 3 + 0];
795 v[1] = vertex3f[e * 3 + 1];
796 v[2] = vertex3f[e * 3 + 2];
800 v[3] = svector3f[e * 3 + 0];
801 v[4] = svector3f[e * 3 + 1];
802 v[5] = svector3f[e * 3 + 2];
806 v[6] = tvector3f[e * 3 + 0];
807 v[7] = tvector3f[e * 3 + 1];
808 v[8] = tvector3f[e * 3 + 2];
812 v[9] = normal3f[e * 3 + 0];
813 v[10] = normal3f[e * 3 + 1];
814 v[11] = normal3f[e * 3 + 2];
818 v[12] = texcoord2f[e * 2 + 0];
819 v[13] = texcoord2f[e * 2 + 1];
822 Mod_ShadowMesh_AddTriangle(mempool, mesh, map_diffuse, map_specular, map_normal, vbuf);
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)
828 return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles, map_diffuse, map_specular, map_normal, light, neighbors, expandable);
831 shadowmesh_t *Mod_ShadowMesh_Finish(mempool_t *mempool, shadowmesh_t *firstmesh, int light, int neighbors)
833 shadowmesh_t *mesh, *newmesh, *nextmesh;
834 // reallocate meshs to conserve space
835 for (mesh = firstmesh, firstmesh = NULL;mesh;mesh = nextmesh)
837 nextmesh = mesh->next;
838 if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
840 newmesh = Mod_ShadowMesh_ReAlloc(mempool, mesh, light, neighbors);
841 newmesh->next = firstmesh;
849 void Mod_ShadowMesh_CalcBBox(shadowmesh_t *firstmesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
853 vec3_t nmins, nmaxs, ncenter, temp;
854 float nradius2, dist2, *v;
856 for (mesh = firstmesh;mesh;mesh = mesh->next)
858 if (mesh == firstmesh)
860 VectorCopy(mesh->vertex3f, nmins);
861 VectorCopy(mesh->vertex3f, nmaxs);
863 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
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];
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;
875 for (mesh = firstmesh;mesh;mesh = mesh->next)
877 for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
879 VectorSubtract(v, ncenter, temp);
880 dist2 = DotProduct(temp, temp);
881 if (nradius2 < dist2)
887 VectorCopy(nmins, mins);
889 VectorCopy(nmaxs, maxs);
891 VectorCopy(ncenter, center);
893 *radius = sqrt(nradius2);
896 void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
898 shadowmesh_t *nextmesh;
899 for (;mesh;mesh = nextmesh)
901 nextmesh = mesh->next;
906 static rtexture_t *GL_TextureForSkinLayer(const qbyte *in, int width, int height, const char *name, const unsigned int *palette, int textureflags)
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);
915 int Mod_LoadSkinFrame(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture)
918 memset(skinframe, 0, sizeof(*skinframe));
919 if (!image_loadskin(&s, basename))
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)
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);
937 if (!skinframe->base)
938 skinframe->base = r_texture_notexture;
939 if (!skinframe->nmap)
940 skinframe->nmap = r_texture_blanknormalmap;
945 int Mod_LoadSkinFrame_Internal(skinframe_t *skinframe, char *basename, int textureflags, int loadpantsandshirt, int loadglowtexture, qbyte *skindata, int width, int height)
947 qbyte *temp1, *temp2;
948 memset(skinframe, 0, sizeof(*skinframe));
951 if (r_shadow_bumpscale_basetexture.value > 0)
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);
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)
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
974 skinframe->base = skinframe->merged = GL_TextureForSkinLayer(skindata, width, height, va("%s_merged", basename), palette_complete, textureflags); // all
975 if (loadpantsandshirt)
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
983 if (!skinframe->nmap)
984 skinframe->nmap = r_texture_blanknormalmap;
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)
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);
997 Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
998 Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
999 texcoord2f[0] = tc[0];
1000 texcoord2f[1] = tc[1];
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)
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);
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)
1030 int x, y, ix, iy, *e;
1032 for (y = 0;y < height;y++)
1034 for (x = 0;x < width;x++)
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);
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);
1051 skinfile_t *Mod_LoadSkinFiles(void)
1053 int i, words, numtags, line, tagsetsused = false, wordsoverflow;
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];
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
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++)
1083 // If it's the first file we parse
1084 if (skinfile == NULL)
1086 skinfile = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1091 skinfile->next = Mem_Alloc(tempmempool, sizeof(skinfile_t));
1092 skinfile = skinfile->next;
1094 skinfile->next = NULL;
1096 for(line = 0;;line++)
1099 if (!COM_ParseToken(&data, true))
1101 if (!strcmp(com_token, "\n"))
1104 wordsoverflow = false;
1108 strlcpy(word[words++], com_token, sizeof (word[0]));
1110 wordsoverflow = true;
1112 while (COM_ParseToken(&data, true) && strcmp(com_token, "\n"));
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);
1118 // words is always >= 1
1119 if (!strcmp(word[0], "replace"))
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));
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]);
1133 else if (words == 2 && !strcmp(word[1], ","))
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));
1141 else if (words == 3 && !strcmp(word[1], ","))
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));
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);
1158 overridetagnameset_t *t;
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));
1168 loadmodel->data_overridetagnamesforskin = Mem_Alloc(loadmodel->mempool, i * sizeof(overridetagnameset_t));
1169 memcpy(loadmodel->data_overridetagnamesforskin, tagsets, i * sizeof(overridetagnameset_t));
1172 loadmodel->numskins = i;
1176 void Mod_FreeSkinFiles(skinfile_t *skinfile)
1179 skinfileitem_t *skinfileitem, *nextitem;
1180 for (;skinfile;skinfile = next)
1182 next = skinfile->next;
1183 for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
1185 nextitem = skinfileitem->next;
1186 Mem_Free(skinfileitem);
1192 int Mod_CountSkinFiles(skinfile_t *skinfile)
1195 for (i = 0;skinfile;skinfile = skinfile->next, i++);
1199 void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
1202 double isnap = 1.0 / snap;
1203 for (i = 0;i < numvertices*numcomponents;i++)
1204 vertices[i] = floor(vertices[i]*isnap)*snap;
1207 int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
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)
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);
1231 return outtriangles;