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annotate src/mesh.cc @ 8:deaf85acf6af

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interactive spheres
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 23 Jul 2010 19:48:43 +0100
parents b06518bb16e9
children d9a1bab1c3f5
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
nuclear@6 11 using namespace std;
nuclear@6 12
nuclear@8 13 #define COMMANDS \
nuclear@6 14 CMD(V), \
nuclear@6 15 CMD(VN), \
nuclear@6 16 CMD(VT), \
nuclear@6 17 CMD(F), \
nuclear@6 18 CMD(O), \
nuclear@6 19 CMD(G), \
nuclear@6 20 CMD(MTLLIB), \
nuclear@6 21 CMD(USEMTL), \
nuclear@6 22 CMD(NEWMTL), \
nuclear@6 23 CMD(KA), \
nuclear@6 24 CMD(KD), \
nuclear@6 25 CMD(KS), \
nuclear@6 26 CMD(NS), \
nuclear@6 27 CMD(NI), \
nuclear@6 28 CMD(D), \
nuclear@6 29 CMD(TR), \
nuclear@6 30 CMD(MAP_KD), \
nuclear@6 31 CMD(MAP_KS), \
nuclear@6 32 CMD(MAP_NS), \
nuclear@6 33 CMD(MAP_D), \
nuclear@6 34 CMD(REFL), \
nuclear@6 35 CMD(BUMP)
nuclear@6 36
nuclear@6 37 #define CMD(x) CMD_##x
nuclear@6 38 enum {
nuclear@6 39 COMMANDS,
nuclear@6 40 CMD_UNK
nuclear@6 41 };
nuclear@6 42 #undef CMD
nuclear@6 43
nuclear@6 44 #define CMD(x) #x
nuclear@6 45 static const char *cmd_names[] = {
nuclear@6 46 COMMANDS,
nuclear@6 47 0
nuclear@6 48 };
nuclear@6 49 #undef CMD
nuclear@6 50
nuclear@6 51 struct Vector3 {
nuclear@6 52 float x, y, z;
nuclear@6 53
nuclear@6 54 Vector3() { x = y = z = 0.0; }
nuclear@6 55 Vector3(float a, float b, float c) { x = a; y = b; z = c; }
nuclear@6 56 };
nuclear@6 57
nuclear@6 58 struct Vector2 {
nuclear@6 59 float x, y;
nuclear@6 60
nuclear@6 61 Vector2() { x = y = 0.0; }
nuclear@6 62 Vector2(float a, float b) { x = a; y = b; }
nuclear@6 63 };
nuclear@6 64
nuclear@6 65 struct obj_face {
nuclear@6 66 int elem;
nuclear@6 67 int v[4], n[4], t[4];
nuclear@6 68 };
nuclear@6 69
nuclear@6 70 struct obj_file {
nuclear@6 71 string cur_obj, cur_mat;
nuclear@6 72 vector<Vector3> v, vn, vt;
nuclear@6 73 vector<obj_face> f;
nuclear@6 74 };
nuclear@6 75
nuclear@6 76 struct obj_mat {
nuclear@6 77 string name; // newmtl <name>
nuclear@6 78 Vector3 ambient, diffuse, specular; // Ka, Kd, Ks
nuclear@6 79 float shininess; // Ns
nuclear@6 80 float ior; // Ni
nuclear@6 81 float alpha; // d, Tr
nuclear@6 82
nuclear@6 83 string tex_dif, tex_spec, tex_shin, tex_alpha; // map_Kd, map_Ks, map_Ns, map_d
nuclear@6 84 string tex_refl; // refl -type sphere|cube file
nuclear@6 85 string tex_bump; // bump
nuclear@6 86
nuclear@6 87 obj_mat() { reset(); }
nuclear@6 88
nuclear@6 89 void reset() {
nuclear@6 90 ambient = diffuse = Vector3(0.5, 0.5, 0.5);
nuclear@6 91 specular = Vector3(0.0, 0.0, 0.0);
nuclear@6 92 name = tex_dif = tex_spec = tex_shin = tex_alpha = tex_refl = tex_bump = "";
nuclear@6 93 shininess = 0;
nuclear@6 94 ior = alpha = 1;
nuclear@6 95 }
nuclear@6 96 };
nuclear@6 97
nuclear@6 98 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl);
nuclear@6 99 static Mesh *cons_mesh(obj_file *obj);
nuclear@6 100
nuclear@6 101 static int get_cmd(char *str);
nuclear@6 102 static bool is_int(const char *str);
nuclear@6 103 static bool is_float(const char *str);
nuclear@6 104 static bool parse_vec(Vector3 *vec);
nuclear@6 105 static bool parse_color(Vector3 *col);
nuclear@6 106 static bool parse_face(obj_face *face);
nuclear@6 107 static const char *parse_map();
nuclear@6 108
nuclear@6 109 static bool find_file(char *res, int sz, const char *fname, const char *path = ".", const char *mode = "rb");
nuclear@6 110 static const char *dirname(const char *str);
nuclear@6 111
nuclear@6 112 static map<string, int> matnames;
nuclear@6 113
nuclear@6 114
nuclear@6 115 #define INVALID_IDX INT_MIN
nuclear@6 116
nuclear@6 117 #define SEP " \t\n\r\v"
nuclear@6 118 #define BUF_SZ 512
nuclear@6 119
nuclear@6 120 bool Scene::load(const char *fname)
nuclear@6 121 {
nuclear@6 122 FILE *fp;
nuclear@6 123
nuclear@6 124 if(!(fp = fopen(fname, "rb"))) {
nuclear@6 125 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@6 126 return false;
nuclear@6 127 }
nuclear@6 128
nuclear@6 129 bool res = load(fp);
nuclear@6 130 fclose(fp);
nuclear@6 131 return res;
nuclear@6 132 }
nuclear@6 133
nuclear@6 134 bool Scene::load(FILE *fp)
nuclear@6 135 {
nuclear@6 136 static int seq;
nuclear@6 137 char cur_name[16];
nuclear@6 138
nuclear@6 139 obj_file obj;
nuclear@8 140
nuclear@6 141 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 142 obj.cur_obj = cur_name;
nuclear@6 143
nuclear@6 144 int prev_cmd = 0, obj_added = 0;
nuclear@6 145 for(;;) {
nuclear@6 146 Vector3 vec;
nuclear@6 147 obj_face face;
nuclear@8 148
nuclear@6 149 char line[BUF_SZ];
nuclear@6 150 fgets(line, sizeof line, fp);
nuclear@6 151 if(feof(fp)) {
nuclear@6 152 break;
nuclear@6 153 }
nuclear@6 154
nuclear@6 155 char *tok;
nuclear@6 156 if(!(tok = strtok(line, SEP))) {
nuclear@6 157 continue; // ignore empty lines
nuclear@6 158 }
nuclear@6 159
nuclear@6 160 int cmd;
nuclear@6 161 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 162 continue; // ignore unknown commands ...
nuclear@6 163 }
nuclear@6 164
nuclear@6 165 switch(cmd) {
nuclear@6 166 case CMD_V:
nuclear@6 167 if(!parse_vec(&vec)) {
nuclear@6 168 continue;
nuclear@6 169 }
nuclear@6 170 obj.v.push_back(vec);
nuclear@6 171 break;
nuclear@6 172
nuclear@6 173 case CMD_VN:
nuclear@6 174 if(!parse_vec(&vec)) {
nuclear@6 175 continue;
nuclear@6 176 }
nuclear@6 177 obj.vn.push_back(vec);
nuclear@6 178 break;
nuclear@6 179
nuclear@6 180 case CMD_VT:
nuclear@6 181 if(!parse_vec(&vec)) {
nuclear@6 182 continue;
nuclear@6 183 }
nuclear@6 184 vec.y = 1.0 - vec.y;
nuclear@6 185 obj.vt.push_back(vec);
nuclear@6 186 break;
nuclear@6 187
nuclear@6 188 case CMD_O:
nuclear@6 189 case CMD_G:
nuclear@6 190 if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
nuclear@6 191 break; // just in case we've got both of them in a row
nuclear@6 192 }
nuclear@6 193 /* if we have any previous data, group them up, add the object
nuclear@6 194 * and continue with the new one...
nuclear@6 195 */
nuclear@6 196 if(!obj.f.empty()) {
nuclear@6 197 Mesh *mesh = cons_mesh(&obj);
nuclear@6 198 mesh->matid = matnames[obj.cur_mat];
nuclear@6 199 meshes.push_back(mesh);
nuclear@6 200 obj_added++;
nuclear@6 201
nuclear@6 202 obj.f.clear(); // clean the face list
nuclear@6 203 }
nuclear@6 204 if((tok = strtok(0, SEP))) {
nuclear@6 205 obj.cur_obj = tok;
nuclear@6 206 } else {
nuclear@6 207 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 208 obj.cur_obj = cur_name;
nuclear@6 209 }
nuclear@6 210 break;
nuclear@6 211
nuclear@6 212 case CMD_MTLLIB:
nuclear@6 213 if((tok = strtok(0, SEP))) {
nuclear@6 214 char path[PATH_MAX];
nuclear@6 215
nuclear@6 216 sprintf(path, ".:%s", dirname(tok));
nuclear@6 217 if(!find_file(path, PATH_MAX, tok, path)) {
nuclear@6 218 fprintf(stderr, "material library not found: %s\n", tok);
nuclear@6 219 continue;
nuclear@6 220 }
nuclear@6 221
nuclear@6 222 FILE *mfile;
nuclear@6 223 if(!(mfile = fopen(path, "rb"))) {
nuclear@6 224 fprintf(stderr, "failed to open material library: %s\n", path);
nuclear@6 225 continue;
nuclear@6 226 }
nuclear@6 227
nuclear@6 228 // load all materials of the mtl file into a vector
nuclear@6 229 vector<obj_mat> vmtl;
nuclear@6 230 if(!read_materials(mfile, &vmtl)) {
nuclear@6 231 continue;
nuclear@6 232 }
nuclear@6 233 fclose(mfile);
nuclear@6 234
nuclear@6 235 // and add them all to the scene
nuclear@6 236 for(size_t i=0; i<vmtl.size(); i++) {
nuclear@6 237 Material mat;
nuclear@6 238
nuclear@6 239 mat.kd[0] = vmtl[i].diffuse.x;
nuclear@6 240 mat.kd[1] = vmtl[i].diffuse.y;
nuclear@6 241 mat.kd[2] = vmtl[i].diffuse.z;
nuclear@6 242
nuclear@6 243 mat.ks[0] = vmtl[i].specular.x;
nuclear@6 244 mat.ks[1] = vmtl[i].specular.y;
nuclear@6 245 mat.ks[2] = vmtl[i].specular.z;
nuclear@6 246
nuclear@6 247 mat.kt = 1.0 - vmtl[i].alpha;
nuclear@6 248 mat.kr = 0.0; // TODO
nuclear@6 249 mat.spow = vmtl[i].shininess;
nuclear@8 250
nuclear@6 251 matnames[vmtl[i].name] = i;
nuclear@6 252 }
nuclear@6 253 }
nuclear@6 254 break;
nuclear@6 255
nuclear@6 256 case CMD_USEMTL:
nuclear@6 257 if((tok = strtok(0, SEP))) {
nuclear@6 258 obj.cur_mat = tok;
nuclear@6 259 } else {
nuclear@6 260 obj.cur_mat = "";
nuclear@6 261 }
nuclear@6 262 break;
nuclear@6 263
nuclear@6 264 case CMD_F:
nuclear@6 265 if(!parse_face(&face)) {
nuclear@6 266 continue;
nuclear@6 267 }
nuclear@6 268
nuclear@6 269 // convert negative indices to regular indices
nuclear@6 270 for(int i=0; i<4; i++) {
nuclear@6 271 if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
nuclear@6 272 face.v[i] = obj.v.size() + face.v[i];
nuclear@6 273 }
nuclear@6 274 if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
nuclear@6 275 face.n[i] = obj.vn.size() + face.n[i];
nuclear@6 276 }
nuclear@6 277 if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
nuclear@6 278 face.t[i] = obj.vt.size() + face.t[i];
nuclear@6 279 }
nuclear@6 280 }
nuclear@6 281
nuclear@6 282 // break quads into triangles if needed
nuclear@6 283 obj.f.push_back(face);
nuclear@6 284 if(face.elem == 4) {
nuclear@6 285 face.v[1] = face.v[2];
nuclear@6 286 face.n[1] = face.n[2];
nuclear@6 287 face.t[1] = face.t[2];
nuclear@6 288
nuclear@6 289 face.v[2] = face.v[3];
nuclear@6 290 face.n[2] = face.n[3];
nuclear@6 291 face.t[2] = face.t[3];
nuclear@6 292
nuclear@6 293 obj.f.push_back(face);
nuclear@6 294 }
nuclear@6 295 break;
nuclear@6 296
nuclear@6 297 default:
nuclear@6 298 break; // ignore unknown commands
nuclear@6 299 }
nuclear@6 300
nuclear@6 301 prev_cmd = cmd;
nuclear@6 302 }
nuclear@6 303
nuclear@6 304 // reached end of file...
nuclear@6 305 if(!obj.f.empty()) {
nuclear@6 306 Mesh *mesh = cons_mesh(&obj);
nuclear@6 307 mesh->matid = matnames[obj.cur_mat];
nuclear@6 308 meshes.push_back(mesh);
nuclear@6 309 obj_added++;
nuclear@6 310 }
nuclear@6 311
nuclear@6 312 return obj_added > 0;
nuclear@6 313 }
nuclear@6 314
nuclear@6 315 static Mesh *cons_mesh(obj_file *obj)
nuclear@6 316 {
nuclear@6 317 Mesh *mesh;
nuclear@6 318
nuclear@6 319 // need at least one of each element
nuclear@6 320 bool added_norm = false, added_tc = false;
nuclear@6 321 if(obj->vn.empty()) {
nuclear@6 322 obj->vn.push_back(Vector3(0, 0, 0));
nuclear@6 323 added_norm = true;
nuclear@6 324 }
nuclear@6 325 if(obj->vt.empty()) {
nuclear@6 326 obj->vt.push_back(Vector3(0, 0, 0));
nuclear@6 327 added_tc = true;
nuclear@6 328 }
nuclear@6 329
nuclear@6 330 mesh = new Mesh;
nuclear@6 331
nuclear@6 332 for(size_t i=0; i<obj->f.size(); i++) {
nuclear@6 333 Face face;
nuclear@6 334
nuclear@6 335 for(int j=0; j<3; j++) {
nuclear@6 336 obj_face *f = &obj->f[i];
nuclear@6 337
nuclear@6 338 face.v[j].pos[0] = obj->v[f->v[j]].x;
nuclear@6 339 face.v[j].pos[1] = obj->v[f->v[j]].y;
nuclear@6 340 face.v[j].pos[2] = obj->v[f->v[j]].z;
nuclear@6 341
nuclear@6 342 int nidx = f->n[j] < 0 ? 0 : f->n[j];
nuclear@6 343 face.v[j].normal[0] = obj->vn[nidx].x;
nuclear@6 344 face.v[j].normal[1] = obj->vn[nidx].y;
nuclear@6 345 face.v[j].normal[2] = obj->vn[nidx].z;
nuclear@6 346
nuclear@6 347 int tidx = f->t[j] < 0 ? 0 : f->t[j];
nuclear@6 348 face.v[j].tex[0] = obj->vt[tidx].x;
nuclear@6 349 face.v[j].tex[1] = obj->vt[tidx].y;
nuclear@6 350 }
nuclear@6 351 mesh->faces.push_back(face);
nuclear@6 352 }
nuclear@6 353
nuclear@6 354 if(added_norm) {
nuclear@6 355 obj->vn.pop_back();
nuclear@6 356 }
nuclear@6 357 if(added_tc) {
nuclear@6 358 obj->vt.pop_back();
nuclear@6 359 }
nuclear@8 360
nuclear@6 361 return mesh;
nuclear@6 362 }
nuclear@6 363
nuclear@6 364 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl)
nuclear@6 365 {
nuclear@6 366 obj_mat mat;
nuclear@6 367
nuclear@6 368 for(;;) {
nuclear@6 369 char line[BUF_SZ];
nuclear@6 370 fgets(line, sizeof line, fp);
nuclear@6 371 if(feof(fp)) {
nuclear@6 372 break;
nuclear@6 373 }
nuclear@6 374
nuclear@6 375 char *tok;
nuclear@6 376 if(!(tok = strtok(line, SEP))) {
nuclear@6 377 continue;
nuclear@6 378 }
nuclear@6 379
nuclear@6 380 int cmd;
nuclear@6 381 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 382 continue;
nuclear@6 383 }
nuclear@6 384
nuclear@6 385 switch(cmd) {
nuclear@6 386 case CMD_NEWMTL:
nuclear@6 387 // add the previous material, and start a new one
nuclear@6 388 if(mat.name.length() > 0) {
nuclear@6 389 vmtl->push_back(mat);
nuclear@6 390 mat.reset();
nuclear@6 391 }
nuclear@6 392 if((tok = strtok(0, SEP))) {
nuclear@6 393 mat.name = tok;
nuclear@6 394 }
nuclear@6 395 break;
nuclear@6 396
nuclear@6 397 case CMD_KA:
nuclear@6 398 parse_color(&mat.ambient);
nuclear@6 399 break;
nuclear@6 400
nuclear@6 401 case CMD_KD:
nuclear@6 402 parse_color(&mat.diffuse);
nuclear@6 403 break;
nuclear@6 404
nuclear@6 405 case CMD_KS:
nuclear@6 406 parse_color(&mat.specular);
nuclear@6 407 break;
nuclear@6 408
nuclear@6 409 case CMD_NS:
nuclear@6 410 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 411 mat.shininess = atof(tok);
nuclear@6 412 }
nuclear@6 413 break;
nuclear@6 414
nuclear@6 415 case CMD_NI:
nuclear@6 416 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 417 mat.ior = atof(tok);
nuclear@6 418 }
nuclear@6 419 break;
nuclear@6 420
nuclear@6 421 case CMD_D:
nuclear@6 422 case CMD_TR:
nuclear@6 423 {
nuclear@6 424 Vector3 c;
nuclear@6 425 if(parse_color(&c)) {
nuclear@6 426 mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
nuclear@6 427 }
nuclear@6 428 }
nuclear@6 429 break;
nuclear@6 430
nuclear@6 431 case CMD_MAP_KD:
nuclear@6 432 mat.tex_dif = parse_map();
nuclear@6 433 break;
nuclear@6 434
nuclear@6 435 default:
nuclear@6 436 break;
nuclear@6 437 }
nuclear@6 438 }
nuclear@6 439
nuclear@6 440 if(mat.name.length() > 0) {
nuclear@6 441 vmtl->push_back(mat);
nuclear@6 442 }
nuclear@6 443 return true;
nuclear@6 444 }
nuclear@6 445
nuclear@6 446 static int get_cmd(char *str)
nuclear@6 447 {
nuclear@6 448 char *s = str;
nuclear@8 449 while((*s = toupper(*s))) s++;
nuclear@6 450
nuclear@6 451 for(int i=0; cmd_names[i]; i++) {
nuclear@6 452 if(strcmp(str, cmd_names[i]) == 0) {
nuclear@6 453 return i;
nuclear@6 454 }
nuclear@6 455 }
nuclear@6 456 return CMD_UNK;
nuclear@6 457 }
nuclear@6 458
nuclear@6 459 static bool is_int(const char *str)
nuclear@6 460 {
nuclear@6 461 char *tmp;
nuclear@6 462 strtol(str, &tmp, 10);
nuclear@6 463 return tmp != str;
nuclear@6 464 }
nuclear@6 465
nuclear@6 466 static bool is_float(const char *str)
nuclear@6 467 {
nuclear@6 468 char *tmp;
nuclear@6 469 strtod(str, &tmp);
nuclear@6 470 return tmp != str;
nuclear@6 471 }
nuclear@6 472
nuclear@6 473 static bool parse_vec(Vector3 *vec)
nuclear@6 474 {
nuclear@6 475 for(int i=0; i<3; i++) {
nuclear@6 476 char *tok;
nuclear@6 477
nuclear@6 478 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 479 if(i < 2) {
nuclear@6 480 return false;
nuclear@6 481 }
nuclear@6 482 vec->z = 0.0;
nuclear@6 483 } else {
nuclear@6 484 float v = atof(tok);
nuclear@6 485
nuclear@6 486 switch(i) {
nuclear@6 487 case 0:
nuclear@6 488 vec->x = v;
nuclear@6 489 break;
nuclear@6 490 case 1:
nuclear@6 491 vec->y = v;
nuclear@6 492 break;
nuclear@6 493 case 2:
nuclear@6 494 vec->z = v;
nuclear@6 495 break;
nuclear@6 496 }
nuclear@6 497 }
nuclear@6 498 }
nuclear@6 499 return true;
nuclear@6 500 }
nuclear@6 501
nuclear@6 502 static bool parse_color(Vector3 *col)
nuclear@6 503 {
nuclear@6 504 for(int i=0; i<3; i++) {
nuclear@6 505 char *tok;
nuclear@6 506
nuclear@6 507 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 508 col->y = col->z = col->x;
nuclear@6 509 return i > 0 ? true : false;
nuclear@6 510 }
nuclear@6 511
nuclear@6 512 float v = atof(tok);
nuclear@6 513 switch(i) {
nuclear@6 514 case 0:
nuclear@6 515 col->x = v;
nuclear@6 516 break;
nuclear@6 517 case 1:
nuclear@6 518 col->y = v;
nuclear@6 519 break;
nuclear@6 520 case 2:
nuclear@6 521 col->z = v;
nuclear@6 522 break;
nuclear@6 523 }
nuclear@6 524 }
nuclear@6 525 return true;
nuclear@6 526 }
nuclear@6 527
nuclear@6 528 static bool parse_face(obj_face *face)
nuclear@6 529 {
nuclear@6 530 char *tok[] = {0, 0, 0, 0};
nuclear@6 531 face->elem = 0;
nuclear@6 532
nuclear@6 533 for(int i=0; i<4; i++) {
nuclear@6 534 if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
nuclear@6 535 if(i < 3) return false; // less than 3 verts? not a polygon
nuclear@6 536 } else {
nuclear@6 537 face->elem++;
nuclear@6 538 }
nuclear@6 539 }
nuclear@6 540
nuclear@6 541 for(int i=0; i<4; i++) {
nuclear@6 542 char *subtok = tok[i];
nuclear@6 543
nuclear@6 544 if(!subtok || !*subtok || !is_int(subtok)) {
nuclear@6 545 if(i < 3) {
nuclear@6 546 return false;
nuclear@6 547 }
nuclear@6 548 face->v[i] = INVALID_IDX;
nuclear@6 549 } else {
nuclear@6 550 face->v[i] = atoi(subtok);
nuclear@6 551 if(face->v[i] > 0) face->v[i]--; /* convert to 0-based */
nuclear@6 552 }
nuclear@6 553
nuclear@6 554 while(subtok && *subtok && *subtok != '/') {
nuclear@6 555 subtok++;
nuclear@6 556 }
nuclear@6 557 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 558 face->t[i] = atoi(subtok);
nuclear@6 559 if(face->t[i] > 0) face->t[i]--; /* convert to 0-based */
nuclear@6 560 } else {
nuclear@6 561 face->t[i] = INVALID_IDX;
nuclear@6 562 }
nuclear@6 563
nuclear@6 564 while(subtok && *subtok && *subtok != '/') {
nuclear@6 565 subtok++;
nuclear@6 566 }
nuclear@6 567 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 568 face->n[i] = atoi(subtok);
nuclear@6 569 if(face->n[i] > 0) face->n[i]--; /* convert to 0-based */
nuclear@6 570 } else {
nuclear@6 571 face->n[i] = INVALID_IDX;
nuclear@6 572 }
nuclear@6 573 }
nuclear@6 574
nuclear@6 575 return true;
nuclear@6 576 }
nuclear@6 577
nuclear@6 578 static const char *parse_map()
nuclear@6 579 {
nuclear@6 580 char *tok, *prev = 0;
nuclear@6 581
nuclear@6 582 while((tok = strtok(0, SEP))) {
nuclear@6 583 prev = tok;
nuclear@6 584 }
nuclear@6 585
nuclear@6 586 return prev ? prev : "";
nuclear@6 587 }
nuclear@6 588
nuclear@6 589 static bool find_file(char *res, int sz, const char *fname, const char *path, const char *mode)
nuclear@6 590 {
nuclear@6 591 FILE *fp;
nuclear@6 592 const char *beg, *end;
nuclear@6 593 int fnamelen = strlen(fname);
nuclear@6 594
nuclear@6 595 beg = path;
nuclear@6 596 while(beg && *beg) {
nuclear@6 597 end = beg;
nuclear@6 598 while(*end && *end != ':') {
nuclear@6 599 end++;
nuclear@6 600 }
nuclear@6 601
nuclear@6 602 int sz = end - beg + 1;
nuclear@6 603 char *pathname = (char*)alloca(sz + fnamelen + 2);
nuclear@6 604 memcpy(pathname, beg, sz);
nuclear@6 605 strcat(pathname, "/");
nuclear@6 606 strcat(pathname, fname);
nuclear@6 607
nuclear@6 608 if((fp = fopen(pathname, mode))) {
nuclear@6 609 fclose(fp);
nuclear@6 610 strncpy(res, pathname, sz);
nuclear@6 611 return true;
nuclear@6 612 }
nuclear@6 613
nuclear@6 614 beg += sz;
nuclear@6 615 }
nuclear@6 616 return false;
nuclear@6 617 }
nuclear@6 618
nuclear@6 619 static const char *dirname(const char *str)
nuclear@6 620 {
nuclear@6 621 static char buf[PATH_MAX];
nuclear@6 622
nuclear@6 623 if(!str || !*str) {
nuclear@6 624 strcpy(buf, ".");
nuclear@6 625 } else {
nuclear@6 626 strncpy(buf, str, PATH_MAX);
nuclear@6 627 char *ptr = strrchr(buf, '/');
nuclear@6 628
nuclear@6 629 if(*ptr) *ptr = 0;
nuclear@6 630 }
nuclear@6 631 return buf;
nuclear@6 632 }