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annotate src/mesh.cc @ 13:407935b73af3

find changesets by author, revision, files, or words in the commit message
bollocks
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 04 Aug 2010 04:51:06 +0100
parents d9a1bab1c3f5
children 29f9330cfa4b
rev   line source
nuclear@6 1 #include <stdio.h>
nuclear@6 2 #include <stdlib.h>
nuclear@6 3 #include <string.h>
nuclear@6 4 #include <errno.h>
nuclear@8 5 #include <limits.h>
nuclear@6 6 #include <string>
nuclear@6 7 #include <vector>
nuclear@6 8 #include <map>
nuclear@6 9 #include "mesh.h"
nuclear@6 10
John@11 11 #ifndef PATH_MAX
John@11 12 #define PATH_MAX 512
John@11 13 #endif
John@11 14
nuclear@6 15 using namespace std;
nuclear@6 16
nuclear@8 17 #define COMMANDS \
nuclear@6 18 CMD(V), \
nuclear@6 19 CMD(VN), \
nuclear@6 20 CMD(VT), \
nuclear@6 21 CMD(F), \
nuclear@6 22 CMD(O), \
nuclear@6 23 CMD(G), \
nuclear@6 24 CMD(MTLLIB), \
nuclear@6 25 CMD(USEMTL), \
nuclear@6 26 CMD(NEWMTL), \
nuclear@6 27 CMD(KA), \
nuclear@6 28 CMD(KD), \
nuclear@6 29 CMD(KS), \
nuclear@6 30 CMD(NS), \
nuclear@6 31 CMD(NI), \
nuclear@6 32 CMD(D), \
nuclear@6 33 CMD(TR), \
nuclear@6 34 CMD(MAP_KD), \
nuclear@6 35 CMD(MAP_KS), \
nuclear@6 36 CMD(MAP_NS), \
nuclear@6 37 CMD(MAP_D), \
nuclear@6 38 CMD(REFL), \
nuclear@6 39 CMD(BUMP)
nuclear@6 40
nuclear@6 41 #define CMD(x) CMD_##x
nuclear@6 42 enum {
nuclear@6 43 COMMANDS,
nuclear@6 44 CMD_UNK
nuclear@6 45 };
nuclear@6 46 #undef CMD
nuclear@6 47
nuclear@6 48 #define CMD(x) #x
nuclear@6 49 static const char *cmd_names[] = {
nuclear@6 50 COMMANDS,
nuclear@6 51 0
nuclear@6 52 };
nuclear@6 53 #undef CMD
nuclear@6 54
nuclear@6 55 struct Vector3 {
nuclear@6 56 float x, y, z;
nuclear@6 57
nuclear@6 58 Vector3() { x = y = z = 0.0; }
nuclear@6 59 Vector3(float a, float b, float c) { x = a; y = b; z = c; }
nuclear@6 60 };
nuclear@6 61
nuclear@6 62 struct Vector2 {
nuclear@6 63 float x, y;
nuclear@6 64
nuclear@6 65 Vector2() { x = y = 0.0; }
nuclear@6 66 Vector2(float a, float b) { x = a; y = b; }
nuclear@6 67 };
nuclear@6 68
nuclear@6 69 struct obj_face {
nuclear@6 70 int elem;
nuclear@6 71 int v[4], n[4], t[4];
nuclear@6 72 };
nuclear@6 73
nuclear@6 74 struct obj_file {
nuclear@6 75 string cur_obj, cur_mat;
nuclear@6 76 vector<Vector3> v, vn, vt;
nuclear@6 77 vector<obj_face> f;
nuclear@6 78 };
nuclear@6 79
nuclear@6 80 struct obj_mat {
nuclear@6 81 string name; // newmtl <name>
nuclear@6 82 Vector3 ambient, diffuse, specular; // Ka, Kd, Ks
nuclear@6 83 float shininess; // Ns
nuclear@6 84 float ior; // Ni
nuclear@6 85 float alpha; // d, Tr
nuclear@6 86
nuclear@6 87 string tex_dif, tex_spec, tex_shin, tex_alpha; // map_Kd, map_Ks, map_Ns, map_d
nuclear@6 88 string tex_refl; // refl -type sphere|cube file
nuclear@6 89 string tex_bump; // bump
nuclear@6 90
nuclear@6 91 obj_mat() { reset(); }
nuclear@6 92
nuclear@6 93 void reset() {
nuclear@6 94 ambient = diffuse = Vector3(0.5, 0.5, 0.5);
nuclear@6 95 specular = Vector3(0.0, 0.0, 0.0);
nuclear@6 96 name = tex_dif = tex_spec = tex_shin = tex_alpha = tex_refl = tex_bump = "";
nuclear@6 97 shininess = 0;
nuclear@6 98 ior = alpha = 1;
nuclear@6 99 }
nuclear@6 100 };
nuclear@6 101
nuclear@6 102 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl);
nuclear@6 103 static Mesh *cons_mesh(obj_file *obj);
nuclear@6 104
nuclear@6 105 static int get_cmd(char *str);
nuclear@6 106 static bool is_int(const char *str);
nuclear@6 107 static bool is_float(const char *str);
nuclear@6 108 static bool parse_vec(Vector3 *vec);
nuclear@6 109 static bool parse_color(Vector3 *col);
nuclear@6 110 static bool parse_face(obj_face *face);
nuclear@6 111 static const char *parse_map();
nuclear@6 112
nuclear@6 113 static bool find_file(char *res, int sz, const char *fname, const char *path = ".", const char *mode = "rb");
nuclear@6 114 static const char *dirname(const char *str);
nuclear@6 115
nuclear@6 116 static map<string, int> matnames;
nuclear@6 117
nuclear@13 118 bool Scene::add_mesh(Mesh *m)
nuclear@13 119 {
nuclear@13 120 // make sure triangles have material ids
nuclear@13 121 for(size_t i=0; i<m->faces.size(); i++) {
nuclear@13 122 m->faces[i].matid = m->matid;
nuclear@13 123 }
nuclear@13 124 meshes.push_back(m);
nuclear@13 125 return true;
nuclear@13 126 }
nuclear@13 127
nuclear@13 128 int Scene::get_num_faces() const
nuclear@13 129 {
nuclear@13 130 int num_faces = 0;
nuclear@13 131 for(size_t i=0; i<meshes.size(); i++) {
nuclear@13 132 num_faces += meshes[i]->faces.size();
nuclear@13 133 }
nuclear@13 134 printf("get_num_faces() = %d\n", num_faces);
nuclear@13 135 return num_faces;
nuclear@13 136 }
nuclear@13 137
nuclear@6 138
nuclear@6 139 #define INVALID_IDX INT_MIN
nuclear@6 140
nuclear@6 141 #define SEP " \t\n\r\v"
nuclear@6 142 #define BUF_SZ 512
nuclear@6 143
nuclear@6 144 bool Scene::load(const char *fname)
nuclear@6 145 {
nuclear@6 146 FILE *fp;
nuclear@6 147
nuclear@6 148 if(!(fp = fopen(fname, "rb"))) {
nuclear@6 149 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@6 150 return false;
nuclear@6 151 }
nuclear@6 152
nuclear@6 153 bool res = load(fp);
nuclear@6 154 fclose(fp);
nuclear@6 155 return res;
nuclear@6 156 }
nuclear@6 157
nuclear@6 158 bool Scene::load(FILE *fp)
nuclear@6 159 {
nuclear@6 160 static int seq;
nuclear@6 161 char cur_name[16];
nuclear@6 162
nuclear@6 163 obj_file obj;
nuclear@8 164
nuclear@6 165 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 166 obj.cur_obj = cur_name;
nuclear@6 167
nuclear@6 168 int prev_cmd = 0, obj_added = 0;
nuclear@6 169 for(;;) {
nuclear@6 170 Vector3 vec;
nuclear@6 171 obj_face face;
nuclear@8 172
nuclear@6 173 char line[BUF_SZ];
nuclear@6 174 fgets(line, sizeof line, fp);
nuclear@6 175 if(feof(fp)) {
nuclear@6 176 break;
nuclear@6 177 }
nuclear@6 178
nuclear@6 179 char *tok;
nuclear@6 180 if(!(tok = strtok(line, SEP))) {
nuclear@6 181 continue; // ignore empty lines
nuclear@6 182 }
nuclear@6 183
nuclear@6 184 int cmd;
nuclear@6 185 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 186 continue; // ignore unknown commands ...
nuclear@6 187 }
nuclear@6 188
nuclear@6 189 switch(cmd) {
nuclear@6 190 case CMD_V:
nuclear@6 191 if(!parse_vec(&vec)) {
nuclear@6 192 continue;
nuclear@6 193 }
nuclear@6 194 obj.v.push_back(vec);
nuclear@6 195 break;
nuclear@6 196
nuclear@6 197 case CMD_VN:
nuclear@6 198 if(!parse_vec(&vec)) {
nuclear@6 199 continue;
nuclear@6 200 }
nuclear@6 201 obj.vn.push_back(vec);
nuclear@6 202 break;
nuclear@6 203
nuclear@6 204 case CMD_VT:
nuclear@6 205 if(!parse_vec(&vec)) {
nuclear@6 206 continue;
nuclear@6 207 }
nuclear@6 208 vec.y = 1.0 - vec.y;
nuclear@6 209 obj.vt.push_back(vec);
nuclear@6 210 break;
nuclear@6 211
nuclear@6 212 case CMD_O:
nuclear@6 213 case CMD_G:
nuclear@6 214 if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
nuclear@6 215 break; // just in case we've got both of them in a row
nuclear@6 216 }
nuclear@6 217 /* if we have any previous data, group them up, add the object
nuclear@6 218 * and continue with the new one...
nuclear@6 219 */
nuclear@6 220 if(!obj.f.empty()) {
nuclear@6 221 Mesh *mesh = cons_mesh(&obj);
nuclear@6 222 mesh->matid = matnames[obj.cur_mat];
nuclear@13 223 add_mesh(mesh);
nuclear@6 224 obj_added++;
nuclear@6 225
nuclear@6 226 obj.f.clear(); // clean the face list
nuclear@6 227 }
nuclear@6 228 if((tok = strtok(0, SEP))) {
nuclear@6 229 obj.cur_obj = tok;
nuclear@6 230 } else {
nuclear@6 231 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 232 obj.cur_obj = cur_name;
nuclear@6 233 }
nuclear@6 234 break;
nuclear@6 235
nuclear@6 236 case CMD_MTLLIB:
nuclear@6 237 if((tok = strtok(0, SEP))) {
nuclear@6 238 char path[PATH_MAX];
nuclear@6 239
nuclear@6 240 sprintf(path, ".:%s", dirname(tok));
nuclear@6 241 if(!find_file(path, PATH_MAX, tok, path)) {
nuclear@6 242 fprintf(stderr, "material library not found: %s\n", tok);
nuclear@6 243 continue;
nuclear@6 244 }
nuclear@6 245
nuclear@6 246 FILE *mfile;
nuclear@6 247 if(!(mfile = fopen(path, "rb"))) {
nuclear@6 248 fprintf(stderr, "failed to open material library: %s\n", path);
nuclear@6 249 continue;
nuclear@6 250 }
nuclear@6 251
nuclear@6 252 // load all materials of the mtl file into a vector
nuclear@6 253 vector<obj_mat> vmtl;
nuclear@6 254 if(!read_materials(mfile, &vmtl)) {
nuclear@6 255 continue;
nuclear@6 256 }
nuclear@6 257 fclose(mfile);
nuclear@6 258
nuclear@6 259 // and add them all to the scene
nuclear@6 260 for(size_t i=0; i<vmtl.size(); i++) {
nuclear@6 261 Material mat;
nuclear@6 262
nuclear@6 263 mat.kd[0] = vmtl[i].diffuse.x;
nuclear@6 264 mat.kd[1] = vmtl[i].diffuse.y;
nuclear@6 265 mat.kd[2] = vmtl[i].diffuse.z;
nuclear@6 266
nuclear@6 267 mat.ks[0] = vmtl[i].specular.x;
nuclear@6 268 mat.ks[1] = vmtl[i].specular.y;
nuclear@6 269 mat.ks[2] = vmtl[i].specular.z;
nuclear@6 270
nuclear@6 271 mat.kt = 1.0 - vmtl[i].alpha;
nuclear@6 272 mat.kr = 0.0; // TODO
nuclear@6 273 mat.spow = vmtl[i].shininess;
nuclear@8 274
nuclear@13 275 matlib.push_back(mat);
nuclear@6 276 matnames[vmtl[i].name] = i;
nuclear@6 277 }
nuclear@6 278 }
nuclear@6 279 break;
nuclear@6 280
nuclear@6 281 case CMD_USEMTL:
nuclear@6 282 if((tok = strtok(0, SEP))) {
nuclear@6 283 obj.cur_mat = tok;
nuclear@6 284 } else {
nuclear@6 285 obj.cur_mat = "";
nuclear@6 286 }
nuclear@6 287 break;
nuclear@6 288
nuclear@6 289 case CMD_F:
nuclear@6 290 if(!parse_face(&face)) {
nuclear@6 291 continue;
nuclear@6 292 }
nuclear@6 293
nuclear@6 294 // convert negative indices to regular indices
nuclear@6 295 for(int i=0; i<4; i++) {
nuclear@6 296 if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
nuclear@6 297 face.v[i] = obj.v.size() + face.v[i];
nuclear@6 298 }
nuclear@6 299 if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
nuclear@6 300 face.n[i] = obj.vn.size() + face.n[i];
nuclear@6 301 }
nuclear@6 302 if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
nuclear@6 303 face.t[i] = obj.vt.size() + face.t[i];
nuclear@6 304 }
nuclear@6 305 }
nuclear@6 306
nuclear@6 307 // break quads into triangles if needed
nuclear@6 308 obj.f.push_back(face);
nuclear@6 309 if(face.elem == 4) {
nuclear@6 310 face.v[1] = face.v[2];
nuclear@6 311 face.n[1] = face.n[2];
nuclear@6 312 face.t[1] = face.t[2];
nuclear@6 313
nuclear@6 314 face.v[2] = face.v[3];
nuclear@6 315 face.n[2] = face.n[3];
nuclear@6 316 face.t[2] = face.t[3];
nuclear@6 317
nuclear@6 318 obj.f.push_back(face);
nuclear@6 319 }
nuclear@6 320 break;
nuclear@6 321
nuclear@6 322 default:
nuclear@6 323 break; // ignore unknown commands
nuclear@6 324 }
nuclear@6 325
nuclear@6 326 prev_cmd = cmd;
nuclear@6 327 }
nuclear@6 328
nuclear@6 329 // reached end of file...
nuclear@6 330 if(!obj.f.empty()) {
nuclear@6 331 Mesh *mesh = cons_mesh(&obj);
nuclear@6 332 mesh->matid = matnames[obj.cur_mat];
nuclear@13 333 add_mesh(mesh);
nuclear@6 334 obj_added++;
nuclear@6 335 }
nuclear@6 336
nuclear@6 337 return obj_added > 0;
nuclear@6 338 }
nuclear@6 339
nuclear@6 340 static Mesh *cons_mesh(obj_file *obj)
nuclear@6 341 {
nuclear@6 342 Mesh *mesh;
nuclear@6 343
nuclear@6 344 // need at least one of each element
nuclear@6 345 bool added_norm = false, added_tc = false;
nuclear@6 346 if(obj->vn.empty()) {
nuclear@6 347 obj->vn.push_back(Vector3(0, 0, 0));
nuclear@6 348 added_norm = true;
nuclear@6 349 }
nuclear@6 350 if(obj->vt.empty()) {
nuclear@6 351 obj->vt.push_back(Vector3(0, 0, 0));
nuclear@6 352 added_tc = true;
nuclear@6 353 }
nuclear@6 354
nuclear@6 355 mesh = new Mesh;
nuclear@6 356
nuclear@6 357 for(size_t i=0; i<obj->f.size(); i++) {
nuclear@6 358 Face face;
nuclear@6 359
nuclear@6 360 for(int j=0; j<3; j++) {
nuclear@6 361 obj_face *f = &obj->f[i];
nuclear@6 362
nuclear@6 363 face.v[j].pos[0] = obj->v[f->v[j]].x;
nuclear@6 364 face.v[j].pos[1] = obj->v[f->v[j]].y;
nuclear@6 365 face.v[j].pos[2] = obj->v[f->v[j]].z;
nuclear@13 366 face.v[j].pos[3] = 0.0;
nuclear@6 367
nuclear@6 368 int nidx = f->n[j] < 0 ? 0 : f->n[j];
nuclear@6 369 face.v[j].normal[0] = obj->vn[nidx].x;
nuclear@6 370 face.v[j].normal[1] = obj->vn[nidx].y;
nuclear@6 371 face.v[j].normal[2] = obj->vn[nidx].z;
nuclear@13 372 face.v[j].normal[3] = 0.0;
nuclear@6 373
nuclear@6 374 int tidx = f->t[j] < 0 ? 0 : f->t[j];
nuclear@6 375 face.v[j].tex[0] = obj->vt[tidx].x;
nuclear@6 376 face.v[j].tex[1] = obj->vt[tidx].y;
nuclear@6 377 }
nuclear@13 378
nuclear@13 379 face.normal[0] = face.v[0].normal[0];
nuclear@13 380 face.normal[1] = face.v[1].normal[1];
nuclear@13 381 face.normal[2] = face.v[2].normal[2];
nuclear@13 382 face.normal[3] = 0.0;
nuclear@13 383
nuclear@6 384 mesh->faces.push_back(face);
nuclear@6 385 }
nuclear@6 386
nuclear@6 387 if(added_norm) {
nuclear@6 388 obj->vn.pop_back();
nuclear@6 389 }
nuclear@6 390 if(added_tc) {
nuclear@6 391 obj->vt.pop_back();
nuclear@6 392 }
nuclear@8 393
nuclear@6 394 return mesh;
nuclear@6 395 }
nuclear@6 396
nuclear@6 397 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl)
nuclear@6 398 {
nuclear@6 399 obj_mat mat;
nuclear@6 400
nuclear@6 401 for(;;) {
nuclear@6 402 char line[BUF_SZ];
nuclear@6 403 fgets(line, sizeof line, fp);
nuclear@6 404 if(feof(fp)) {
nuclear@6 405 break;
nuclear@6 406 }
nuclear@6 407
nuclear@6 408 char *tok;
nuclear@6 409 if(!(tok = strtok(line, SEP))) {
nuclear@6 410 continue;
nuclear@6 411 }
nuclear@6 412
nuclear@6 413 int cmd;
nuclear@6 414 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 415 continue;
nuclear@6 416 }
nuclear@6 417
nuclear@6 418 switch(cmd) {
nuclear@6 419 case CMD_NEWMTL:
nuclear@6 420 // add the previous material, and start a new one
nuclear@6 421 if(mat.name.length() > 0) {
nuclear@13 422 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 423 vmtl->push_back(mat);
nuclear@6 424 mat.reset();
nuclear@6 425 }
nuclear@6 426 if((tok = strtok(0, SEP))) {
nuclear@6 427 mat.name = tok;
nuclear@6 428 }
nuclear@6 429 break;
nuclear@6 430
nuclear@6 431 case CMD_KA:
nuclear@6 432 parse_color(&mat.ambient);
nuclear@6 433 break;
nuclear@6 434
nuclear@6 435 case CMD_KD:
nuclear@6 436 parse_color(&mat.diffuse);
nuclear@6 437 break;
nuclear@6 438
nuclear@6 439 case CMD_KS:
nuclear@6 440 parse_color(&mat.specular);
nuclear@6 441 break;
nuclear@6 442
nuclear@6 443 case CMD_NS:
nuclear@6 444 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 445 mat.shininess = atof(tok);
nuclear@6 446 }
nuclear@6 447 break;
nuclear@6 448
nuclear@6 449 case CMD_NI:
nuclear@6 450 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 451 mat.ior = atof(tok);
nuclear@6 452 }
nuclear@6 453 break;
nuclear@6 454
nuclear@6 455 case CMD_D:
nuclear@6 456 case CMD_TR:
nuclear@6 457 {
nuclear@6 458 Vector3 c;
nuclear@6 459 if(parse_color(&c)) {
nuclear@6 460 mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
nuclear@6 461 }
nuclear@6 462 }
nuclear@6 463 break;
nuclear@6 464
nuclear@6 465 case CMD_MAP_KD:
nuclear@6 466 mat.tex_dif = parse_map();
nuclear@6 467 break;
nuclear@6 468
nuclear@6 469 default:
nuclear@6 470 break;
nuclear@6 471 }
nuclear@6 472 }
nuclear@6 473
nuclear@6 474 if(mat.name.length() > 0) {
nuclear@13 475 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 476 vmtl->push_back(mat);
nuclear@6 477 }
nuclear@6 478 return true;
nuclear@6 479 }
nuclear@6 480
nuclear@6 481 static int get_cmd(char *str)
nuclear@6 482 {
nuclear@6 483 char *s = str;
nuclear@8 484 while((*s = toupper(*s))) s++;
nuclear@6 485
nuclear@6 486 for(int i=0; cmd_names[i]; i++) {
nuclear@6 487 if(strcmp(str, cmd_names[i]) == 0) {
nuclear@6 488 return i;
nuclear@6 489 }
nuclear@6 490 }
nuclear@6 491 return CMD_UNK;
nuclear@6 492 }
nuclear@6 493
nuclear@6 494 static bool is_int(const char *str)
nuclear@6 495 {
nuclear@6 496 char *tmp;
nuclear@6 497 strtol(str, &tmp, 10);
nuclear@6 498 return tmp != str;
nuclear@6 499 }
nuclear@6 500
nuclear@6 501 static bool is_float(const char *str)
nuclear@6 502 {
nuclear@6 503 char *tmp;
nuclear@6 504 strtod(str, &tmp);
nuclear@6 505 return tmp != str;
nuclear@6 506 }
nuclear@6 507
nuclear@6 508 static bool parse_vec(Vector3 *vec)
nuclear@6 509 {
nuclear@6 510 for(int i=0; i<3; i++) {
nuclear@6 511 char *tok;
nuclear@6 512
nuclear@6 513 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 514 if(i < 2) {
nuclear@6 515 return false;
nuclear@6 516 }
nuclear@6 517 vec->z = 0.0;
nuclear@6 518 } else {
nuclear@6 519 float v = atof(tok);
nuclear@6 520
nuclear@6 521 switch(i) {
nuclear@6 522 case 0:
nuclear@6 523 vec->x = v;
nuclear@6 524 break;
nuclear@6 525 case 1:
nuclear@6 526 vec->y = v;
nuclear@6 527 break;
nuclear@6 528 case 2:
nuclear@6 529 vec->z = v;
nuclear@6 530 break;
nuclear@6 531 }
nuclear@6 532 }
nuclear@6 533 }
nuclear@6 534 return true;
nuclear@6 535 }
nuclear@6 536
nuclear@6 537 static bool parse_color(Vector3 *col)
nuclear@6 538 {
nuclear@6 539 for(int i=0; i<3; i++) {
nuclear@6 540 char *tok;
nuclear@6 541
nuclear@6 542 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 543 col->y = col->z = col->x;
nuclear@6 544 return i > 0 ? true : false;
nuclear@6 545 }
nuclear@6 546
nuclear@6 547 float v = atof(tok);
nuclear@6 548 switch(i) {
nuclear@6 549 case 0:
nuclear@6 550 col->x = v;
nuclear@6 551 break;
nuclear@6 552 case 1:
nuclear@6 553 col->y = v;
nuclear@6 554 break;
nuclear@6 555 case 2:
nuclear@6 556 col->z = v;
nuclear@6 557 break;
nuclear@6 558 }
nuclear@6 559 }
nuclear@6 560 return true;
nuclear@6 561 }
nuclear@6 562
nuclear@6 563 static bool parse_face(obj_face *face)
nuclear@6 564 {
nuclear@6 565 char *tok[] = {0, 0, 0, 0};
nuclear@6 566 face->elem = 0;
nuclear@6 567
nuclear@6 568 for(int i=0; i<4; i++) {
nuclear@6 569 if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
nuclear@6 570 if(i < 3) return false; // less than 3 verts? not a polygon
nuclear@6 571 } else {
nuclear@6 572 face->elem++;
nuclear@6 573 }
nuclear@6 574 }
nuclear@6 575
nuclear@6 576 for(int i=0; i<4; i++) {
nuclear@6 577 char *subtok = tok[i];
nuclear@6 578
nuclear@6 579 if(!subtok || !*subtok || !is_int(subtok)) {
nuclear@6 580 if(i < 3) {
nuclear@6 581 return false;
nuclear@6 582 }
nuclear@6 583 face->v[i] = INVALID_IDX;
nuclear@6 584 } else {
nuclear@6 585 face->v[i] = atoi(subtok);
nuclear@6 586 if(face->v[i] > 0) face->v[i]--; /* convert to 0-based */
nuclear@6 587 }
nuclear@6 588
nuclear@6 589 while(subtok && *subtok && *subtok != '/') {
nuclear@6 590 subtok++;
nuclear@6 591 }
nuclear@6 592 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 593 face->t[i] = atoi(subtok);
nuclear@6 594 if(face->t[i] > 0) face->t[i]--; /* convert to 0-based */
nuclear@6 595 } else {
nuclear@6 596 face->t[i] = INVALID_IDX;
nuclear@6 597 }
nuclear@6 598
nuclear@6 599 while(subtok && *subtok && *subtok != '/') {
nuclear@6 600 subtok++;
nuclear@6 601 }
nuclear@6 602 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 603 face->n[i] = atoi(subtok);
nuclear@6 604 if(face->n[i] > 0) face->n[i]--; /* convert to 0-based */
nuclear@6 605 } else {
nuclear@6 606 face->n[i] = INVALID_IDX;
nuclear@6 607 }
nuclear@6 608 }
nuclear@6 609
nuclear@6 610 return true;
nuclear@6 611 }
nuclear@6 612
nuclear@6 613 static const char *parse_map()
nuclear@6 614 {
nuclear@6 615 char *tok, *prev = 0;
nuclear@6 616
nuclear@6 617 while((tok = strtok(0, SEP))) {
nuclear@6 618 prev = tok;
nuclear@6 619 }
nuclear@6 620
nuclear@6 621 return prev ? prev : "";
nuclear@6 622 }
nuclear@6 623
nuclear@6 624 static bool find_file(char *res, int sz, const char *fname, const char *path, const char *mode)
nuclear@6 625 {
nuclear@6 626 FILE *fp;
nuclear@6 627 const char *beg, *end;
nuclear@6 628 int fnamelen = strlen(fname);
nuclear@6 629
nuclear@6 630 beg = path;
nuclear@6 631 while(beg && *beg) {
nuclear@6 632 end = beg;
nuclear@6 633 while(*end && *end != ':') {
nuclear@6 634 end++;
nuclear@6 635 }
nuclear@6 636
nuclear@13 637 int res_len = end - beg;
nuclear@13 638 char *pathname = (char*)alloca(res_len + fnamelen + 2);
nuclear@13 639 memcpy(pathname, beg, res_len);
nuclear@13 640 pathname[res_len] = 0;
nuclear@6 641 strcat(pathname, "/");
nuclear@6 642 strcat(pathname, fname);
nuclear@6 643
nuclear@6 644 if((fp = fopen(pathname, mode))) {
nuclear@6 645 fclose(fp);
nuclear@6 646 strncpy(res, pathname, sz);
nuclear@6 647 return true;
nuclear@6 648 }
nuclear@6 649
nuclear@13 650 beg += res_len;
nuclear@6 651 }
nuclear@6 652 return false;
nuclear@6 653 }
nuclear@6 654
nuclear@6 655 static const char *dirname(const char *str)
nuclear@6 656 {
nuclear@6 657 static char buf[PATH_MAX];
nuclear@6 658
nuclear@6 659 if(!str || !*str) {
nuclear@6 660 strcpy(buf, ".");
nuclear@6 661 } else {
nuclear@6 662 strncpy(buf, str, PATH_MAX);
nuclear@6 663 char *ptr = strrchr(buf, '/');
nuclear@6 664
nuclear@13 665 if(ptr && *ptr) *ptr = 0;
nuclear@6 666 }
nuclear@6 667 return buf;
nuclear@6 668 }