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annotate src/mesh.cc @ 15:754faf15ba36

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burp
author John Tsiombikas
date Sun, 08 Aug 2010 09:51:45 +0100
parents 29f9330cfa4b
children 9e4a28063394
rev   line source
nuclear@6 1 #include <stdio.h>
nuclear@6 2 #include <stdlib.h>
nuclear@6 3 #include <string.h>
John@15 4 #include <math.h>
nuclear@6 5 #include <errno.h>
nuclear@8 6 #include <limits.h>
nuclear@6 7 #include <string>
nuclear@6 8 #include <vector>
nuclear@6 9 #include <map>
nuclear@6 10 #include "mesh.h"
nuclear@6 11
John@11 12 #ifndef PATH_MAX
John@11 13 #define PATH_MAX 512
John@11 14 #endif
John@11 15
nuclear@6 16 using namespace std;
nuclear@6 17
nuclear@8 18 #define COMMANDS \
nuclear@6 19 CMD(V), \
nuclear@6 20 CMD(VN), \
nuclear@6 21 CMD(VT), \
nuclear@6 22 CMD(F), \
nuclear@6 23 CMD(O), \
nuclear@6 24 CMD(G), \
nuclear@6 25 CMD(MTLLIB), \
nuclear@6 26 CMD(USEMTL), \
nuclear@6 27 CMD(NEWMTL), \
nuclear@6 28 CMD(KA), \
nuclear@6 29 CMD(KD), \
nuclear@6 30 CMD(KS), \
nuclear@6 31 CMD(NS), \
nuclear@6 32 CMD(NI), \
nuclear@6 33 CMD(D), \
nuclear@6 34 CMD(TR), \
nuclear@6 35 CMD(MAP_KD), \
nuclear@6 36 CMD(MAP_KS), \
nuclear@6 37 CMD(MAP_NS), \
nuclear@6 38 CMD(MAP_D), \
nuclear@6 39 CMD(REFL), \
nuclear@6 40 CMD(BUMP)
nuclear@6 41
nuclear@6 42 #define CMD(x) CMD_##x
nuclear@6 43 enum {
nuclear@6 44 COMMANDS,
nuclear@6 45 CMD_UNK
nuclear@6 46 };
nuclear@6 47 #undef CMD
nuclear@6 48
nuclear@6 49 #define CMD(x) #x
nuclear@6 50 static const char *cmd_names[] = {
nuclear@6 51 COMMANDS,
nuclear@6 52 0
nuclear@6 53 };
nuclear@6 54 #undef CMD
nuclear@6 55
nuclear@6 56 struct Vector3 {
nuclear@6 57 float x, y, z;
nuclear@6 58
nuclear@6 59 Vector3() { x = y = z = 0.0; }
nuclear@6 60 Vector3(float a, float b, float c) { x = a; y = b; z = c; }
nuclear@6 61 };
nuclear@6 62
nuclear@6 63 struct Vector2 {
nuclear@6 64 float x, y;
nuclear@6 65
nuclear@6 66 Vector2() { x = y = 0.0; }
nuclear@6 67 Vector2(float a, float b) { x = a; y = b; }
nuclear@6 68 };
nuclear@6 69
nuclear@6 70 struct obj_face {
nuclear@6 71 int elem;
nuclear@6 72 int v[4], n[4], t[4];
nuclear@6 73 };
nuclear@6 74
nuclear@6 75 struct obj_file {
nuclear@6 76 string cur_obj, cur_mat;
nuclear@6 77 vector<Vector3> v, vn, vt;
nuclear@6 78 vector<obj_face> f;
nuclear@6 79 };
nuclear@6 80
nuclear@6 81 struct obj_mat {
nuclear@6 82 string name; // newmtl <name>
nuclear@6 83 Vector3 ambient, diffuse, specular; // Ka, Kd, Ks
nuclear@6 84 float shininess; // Ns
nuclear@6 85 float ior; // Ni
nuclear@6 86 float alpha; // d, Tr
nuclear@6 87
nuclear@6 88 string tex_dif, tex_spec, tex_shin, tex_alpha; // map_Kd, map_Ks, map_Ns, map_d
nuclear@6 89 string tex_refl; // refl -type sphere|cube file
nuclear@6 90 string tex_bump; // bump
nuclear@6 91
nuclear@6 92 obj_mat() { reset(); }
nuclear@6 93
nuclear@6 94 void reset() {
nuclear@6 95 ambient = diffuse = Vector3(0.5, 0.5, 0.5);
nuclear@6 96 specular = Vector3(0.0, 0.0, 0.0);
nuclear@6 97 name = tex_dif = tex_spec = tex_shin = tex_alpha = tex_refl = tex_bump = "";
nuclear@6 98 shininess = 0;
nuclear@6 99 ior = alpha = 1;
nuclear@6 100 }
nuclear@6 101 };
nuclear@6 102
nuclear@6 103 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl);
nuclear@6 104 static Mesh *cons_mesh(obj_file *obj);
nuclear@6 105
nuclear@6 106 static int get_cmd(char *str);
nuclear@6 107 static bool is_int(const char *str);
nuclear@6 108 static bool is_float(const char *str);
nuclear@6 109 static bool parse_vec(Vector3 *vec);
nuclear@6 110 static bool parse_color(Vector3 *col);
nuclear@6 111 static bool parse_face(obj_face *face);
nuclear@6 112 static const char *parse_map();
nuclear@6 113
nuclear@6 114 static bool find_file(char *res, int sz, const char *fname, const char *path = ".", const char *mode = "rb");
nuclear@6 115 static const char *dirname(const char *str);
nuclear@6 116
nuclear@6 117 static map<string, int> matnames;
nuclear@6 118
John@15 119
John@15 120 #define FEQ(a, b) (fabs((a) - (b)) < 1e-8)
John@15 121 bool Face::operator ==(const Face &f) const
John@15 122 {
John@15 123 for(int i=0; i<3; i++) {
John@15 124 for(int j=0; j<3; j++) {
John@15 125 if(!FEQ(v[i].pos[j], f.v[i].pos[j])) {
John@15 126 return false;
John@15 127 }
John@15 128 if(!FEQ(v[i].normal[j], f.v[i].normal[j])) {
John@15 129 return false;
John@15 130 }
John@15 131 }
John@15 132 if(!FEQ(normal[i], f.normal[i])) {
John@15 133 return false;
John@15 134 }
John@15 135 }
John@15 136 return true;
John@15 137 }
John@15 138
nuclear@13 139 bool Scene::add_mesh(Mesh *m)
nuclear@13 140 {
nuclear@13 141 // make sure triangles have material ids
nuclear@13 142 for(size_t i=0; i<m->faces.size(); i++) {
nuclear@13 143 m->faces[i].matid = m->matid;
nuclear@13 144 }
nuclear@13 145 meshes.push_back(m);
nuclear@13 146 return true;
nuclear@13 147 }
nuclear@13 148
John@14 149 int Scene::get_num_meshes() const
John@14 150 {
John@14 151 return (int)meshes.size();
John@14 152 }
John@14 153
nuclear@13 154 int Scene::get_num_faces() const
nuclear@13 155 {
nuclear@13 156 int num_faces = 0;
nuclear@13 157 for(size_t i=0; i<meshes.size(); i++) {
nuclear@13 158 num_faces += meshes[i]->faces.size();
nuclear@13 159 }
nuclear@13 160 printf("get_num_faces() = %d\n", num_faces);
nuclear@13 161 return num_faces;
nuclear@13 162 }
nuclear@13 163
John@14 164 int Scene::get_num_materials() const
John@14 165 {
John@14 166 return (int)matlib.size();
John@14 167 }
John@14 168
John@14 169 Material *Scene::get_materials()
John@14 170 {
John@14 171 if(matlib.empty()) {
John@14 172 return 0;
John@14 173 }
John@14 174 return &matlib[0];
John@14 175 }
John@14 176
John@14 177 const Material *Scene::get_materials() const
John@14 178 {
John@14 179 if(matlib.empty()) {
John@14 180 return 0;
John@14 181 }
John@14 182 return &matlib[0];
John@14 183 }
John@14 184
nuclear@6 185
nuclear@6 186 #define INVALID_IDX INT_MIN
nuclear@6 187
nuclear@6 188 #define SEP " \t\n\r\v"
nuclear@6 189 #define BUF_SZ 512
nuclear@6 190
nuclear@6 191 bool Scene::load(const char *fname)
nuclear@6 192 {
nuclear@6 193 FILE *fp;
nuclear@6 194
nuclear@6 195 if(!(fp = fopen(fname, "rb"))) {
nuclear@6 196 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@6 197 return false;
nuclear@6 198 }
nuclear@6 199
nuclear@6 200 bool res = load(fp);
nuclear@6 201 fclose(fp);
nuclear@6 202 return res;
nuclear@6 203 }
nuclear@6 204
nuclear@6 205 bool Scene::load(FILE *fp)
nuclear@6 206 {
nuclear@6 207 static int seq;
nuclear@6 208 char cur_name[16];
nuclear@6 209
nuclear@6 210 obj_file obj;
nuclear@8 211
nuclear@6 212 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 213 obj.cur_obj = cur_name;
nuclear@6 214
nuclear@6 215 int prev_cmd = 0, obj_added = 0;
nuclear@6 216 for(;;) {
nuclear@6 217 Vector3 vec;
nuclear@6 218 obj_face face;
nuclear@8 219
nuclear@6 220 char line[BUF_SZ];
nuclear@6 221 fgets(line, sizeof line, fp);
nuclear@6 222 if(feof(fp)) {
nuclear@6 223 break;
nuclear@6 224 }
nuclear@6 225
nuclear@6 226 char *tok;
nuclear@6 227 if(!(tok = strtok(line, SEP))) {
nuclear@6 228 continue; // ignore empty lines
nuclear@6 229 }
nuclear@6 230
nuclear@6 231 int cmd;
nuclear@6 232 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 233 continue; // ignore unknown commands ...
nuclear@6 234 }
nuclear@6 235
nuclear@6 236 switch(cmd) {
nuclear@6 237 case CMD_V:
nuclear@6 238 if(!parse_vec(&vec)) {
nuclear@6 239 continue;
nuclear@6 240 }
nuclear@6 241 obj.v.push_back(vec);
nuclear@6 242 break;
nuclear@6 243
nuclear@6 244 case CMD_VN:
nuclear@6 245 if(!parse_vec(&vec)) {
nuclear@6 246 continue;
nuclear@6 247 }
nuclear@6 248 obj.vn.push_back(vec);
nuclear@6 249 break;
nuclear@6 250
nuclear@6 251 case CMD_VT:
nuclear@6 252 if(!parse_vec(&vec)) {
nuclear@6 253 continue;
nuclear@6 254 }
nuclear@6 255 vec.y = 1.0 - vec.y;
nuclear@6 256 obj.vt.push_back(vec);
nuclear@6 257 break;
nuclear@6 258
nuclear@6 259 case CMD_O:
nuclear@6 260 case CMD_G:
nuclear@6 261 if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
nuclear@6 262 break; // just in case we've got both of them in a row
nuclear@6 263 }
nuclear@6 264 /* if we have any previous data, group them up, add the object
nuclear@6 265 * and continue with the new one...
nuclear@6 266 */
nuclear@6 267 if(!obj.f.empty()) {
nuclear@6 268 Mesh *mesh = cons_mesh(&obj);
nuclear@6 269 mesh->matid = matnames[obj.cur_mat];
nuclear@13 270 add_mesh(mesh);
nuclear@6 271 obj_added++;
nuclear@6 272
nuclear@6 273 obj.f.clear(); // clean the face list
nuclear@6 274 }
nuclear@6 275 if((tok = strtok(0, SEP))) {
nuclear@6 276 obj.cur_obj = tok;
nuclear@6 277 } else {
nuclear@6 278 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 279 obj.cur_obj = cur_name;
nuclear@6 280 }
nuclear@6 281 break;
nuclear@6 282
nuclear@6 283 case CMD_MTLLIB:
nuclear@6 284 if((tok = strtok(0, SEP))) {
nuclear@6 285 char path[PATH_MAX];
nuclear@6 286
nuclear@6 287 sprintf(path, ".:%s", dirname(tok));
nuclear@6 288 if(!find_file(path, PATH_MAX, tok, path)) {
nuclear@6 289 fprintf(stderr, "material library not found: %s\n", tok);
nuclear@6 290 continue;
nuclear@6 291 }
nuclear@6 292
nuclear@6 293 FILE *mfile;
nuclear@6 294 if(!(mfile = fopen(path, "rb"))) {
nuclear@6 295 fprintf(stderr, "failed to open material library: %s\n", path);
nuclear@6 296 continue;
nuclear@6 297 }
nuclear@6 298
nuclear@6 299 // load all materials of the mtl file into a vector
nuclear@6 300 vector<obj_mat> vmtl;
nuclear@6 301 if(!read_materials(mfile, &vmtl)) {
nuclear@6 302 continue;
nuclear@6 303 }
nuclear@6 304 fclose(mfile);
nuclear@6 305
nuclear@6 306 // and add them all to the scene
nuclear@6 307 for(size_t i=0; i<vmtl.size(); i++) {
nuclear@6 308 Material mat;
nuclear@6 309
nuclear@6 310 mat.kd[0] = vmtl[i].diffuse.x;
nuclear@6 311 mat.kd[1] = vmtl[i].diffuse.y;
nuclear@6 312 mat.kd[2] = vmtl[i].diffuse.z;
nuclear@6 313
nuclear@6 314 mat.ks[0] = vmtl[i].specular.x;
nuclear@6 315 mat.ks[1] = vmtl[i].specular.y;
nuclear@6 316 mat.ks[2] = vmtl[i].specular.z;
nuclear@6 317
nuclear@6 318 mat.kt = 1.0 - vmtl[i].alpha;
nuclear@6 319 mat.kr = 0.0; // TODO
nuclear@6 320 mat.spow = vmtl[i].shininess;
nuclear@8 321
nuclear@13 322 matlib.push_back(mat);
nuclear@6 323 matnames[vmtl[i].name] = i;
nuclear@6 324 }
nuclear@6 325 }
nuclear@6 326 break;
nuclear@6 327
nuclear@6 328 case CMD_USEMTL:
nuclear@6 329 if((tok = strtok(0, SEP))) {
nuclear@6 330 obj.cur_mat = tok;
nuclear@6 331 } else {
nuclear@6 332 obj.cur_mat = "";
nuclear@6 333 }
nuclear@6 334 break;
nuclear@6 335
nuclear@6 336 case CMD_F:
nuclear@6 337 if(!parse_face(&face)) {
nuclear@6 338 continue;
nuclear@6 339 }
nuclear@6 340
nuclear@6 341 // convert negative indices to regular indices
nuclear@6 342 for(int i=0; i<4; i++) {
nuclear@6 343 if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
nuclear@6 344 face.v[i] = obj.v.size() + face.v[i];
nuclear@6 345 }
nuclear@6 346 if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
nuclear@6 347 face.n[i] = obj.vn.size() + face.n[i];
nuclear@6 348 }
nuclear@6 349 if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
nuclear@6 350 face.t[i] = obj.vt.size() + face.t[i];
nuclear@6 351 }
nuclear@6 352 }
nuclear@6 353
nuclear@6 354 // break quads into triangles if needed
nuclear@6 355 obj.f.push_back(face);
nuclear@6 356 if(face.elem == 4) {
nuclear@6 357 face.v[1] = face.v[2];
nuclear@6 358 face.n[1] = face.n[2];
nuclear@6 359 face.t[1] = face.t[2];
nuclear@6 360
nuclear@6 361 face.v[2] = face.v[3];
nuclear@6 362 face.n[2] = face.n[3];
nuclear@6 363 face.t[2] = face.t[3];
nuclear@6 364
nuclear@6 365 obj.f.push_back(face);
nuclear@6 366 }
nuclear@6 367 break;
nuclear@6 368
nuclear@6 369 default:
nuclear@6 370 break; // ignore unknown commands
nuclear@6 371 }
nuclear@6 372
nuclear@6 373 prev_cmd = cmd;
nuclear@6 374 }
nuclear@6 375
nuclear@6 376 // reached end of file...
nuclear@6 377 if(!obj.f.empty()) {
nuclear@6 378 Mesh *mesh = cons_mesh(&obj);
nuclear@6 379 mesh->matid = matnames[obj.cur_mat];
nuclear@13 380 add_mesh(mesh);
nuclear@6 381 obj_added++;
nuclear@6 382 }
nuclear@6 383
nuclear@6 384 return obj_added > 0;
nuclear@6 385 }
nuclear@6 386
nuclear@6 387 static Mesh *cons_mesh(obj_file *obj)
nuclear@6 388 {
nuclear@6 389 Mesh *mesh;
nuclear@6 390
nuclear@6 391 // need at least one of each element
nuclear@6 392 bool added_norm = false, added_tc = false;
nuclear@6 393 if(obj->vn.empty()) {
nuclear@6 394 obj->vn.push_back(Vector3(0, 0, 0));
nuclear@6 395 added_norm = true;
nuclear@6 396 }
nuclear@6 397 if(obj->vt.empty()) {
nuclear@6 398 obj->vt.push_back(Vector3(0, 0, 0));
nuclear@6 399 added_tc = true;
nuclear@6 400 }
nuclear@6 401
nuclear@6 402 mesh = new Mesh;
nuclear@6 403
nuclear@6 404 for(size_t i=0; i<obj->f.size(); i++) {
nuclear@6 405 Face face;
nuclear@6 406
nuclear@6 407 for(int j=0; j<3; j++) {
nuclear@6 408 obj_face *f = &obj->f[i];
nuclear@6 409
nuclear@6 410 face.v[j].pos[0] = obj->v[f->v[j]].x;
nuclear@6 411 face.v[j].pos[1] = obj->v[f->v[j]].y;
nuclear@6 412 face.v[j].pos[2] = obj->v[f->v[j]].z;
nuclear@13 413 face.v[j].pos[3] = 0.0;
nuclear@6 414
nuclear@6 415 int nidx = f->n[j] < 0 ? 0 : f->n[j];
nuclear@6 416 face.v[j].normal[0] = obj->vn[nidx].x;
nuclear@6 417 face.v[j].normal[1] = obj->vn[nidx].y;
nuclear@6 418 face.v[j].normal[2] = obj->vn[nidx].z;
nuclear@13 419 face.v[j].normal[3] = 0.0;
nuclear@6 420
nuclear@6 421 int tidx = f->t[j] < 0 ? 0 : f->t[j];
nuclear@6 422 face.v[j].tex[0] = obj->vt[tidx].x;
nuclear@6 423 face.v[j].tex[1] = obj->vt[tidx].y;
nuclear@6 424 }
nuclear@13 425
nuclear@13 426 face.normal[0] = face.v[0].normal[0];
nuclear@13 427 face.normal[1] = face.v[1].normal[1];
nuclear@13 428 face.normal[2] = face.v[2].normal[2];
nuclear@13 429 face.normal[3] = 0.0;
nuclear@13 430
nuclear@6 431 mesh->faces.push_back(face);
nuclear@6 432 }
nuclear@6 433
nuclear@6 434 if(added_norm) {
nuclear@6 435 obj->vn.pop_back();
nuclear@6 436 }
nuclear@6 437 if(added_tc) {
nuclear@6 438 obj->vt.pop_back();
nuclear@6 439 }
nuclear@8 440
nuclear@6 441 return mesh;
nuclear@6 442 }
nuclear@6 443
nuclear@6 444 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl)
nuclear@6 445 {
nuclear@6 446 obj_mat mat;
nuclear@6 447
nuclear@6 448 for(;;) {
nuclear@6 449 char line[BUF_SZ];
nuclear@6 450 fgets(line, sizeof line, fp);
nuclear@6 451 if(feof(fp)) {
nuclear@6 452 break;
nuclear@6 453 }
nuclear@6 454
nuclear@6 455 char *tok;
nuclear@6 456 if(!(tok = strtok(line, SEP))) {
nuclear@6 457 continue;
nuclear@6 458 }
nuclear@6 459
nuclear@6 460 int cmd;
nuclear@6 461 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 462 continue;
nuclear@6 463 }
nuclear@6 464
nuclear@6 465 switch(cmd) {
nuclear@6 466 case CMD_NEWMTL:
nuclear@6 467 // add the previous material, and start a new one
nuclear@6 468 if(mat.name.length() > 0) {
nuclear@13 469 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 470 vmtl->push_back(mat);
nuclear@6 471 mat.reset();
nuclear@6 472 }
nuclear@6 473 if((tok = strtok(0, SEP))) {
nuclear@6 474 mat.name = tok;
nuclear@6 475 }
nuclear@6 476 break;
nuclear@6 477
nuclear@6 478 case CMD_KA:
nuclear@6 479 parse_color(&mat.ambient);
nuclear@6 480 break;
nuclear@6 481
nuclear@6 482 case CMD_KD:
nuclear@6 483 parse_color(&mat.diffuse);
nuclear@6 484 break;
nuclear@6 485
nuclear@6 486 case CMD_KS:
nuclear@6 487 parse_color(&mat.specular);
nuclear@6 488 break;
nuclear@6 489
nuclear@6 490 case CMD_NS:
nuclear@6 491 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 492 mat.shininess = atof(tok);
nuclear@6 493 }
nuclear@6 494 break;
nuclear@6 495
nuclear@6 496 case CMD_NI:
nuclear@6 497 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 498 mat.ior = atof(tok);
nuclear@6 499 }
nuclear@6 500 break;
nuclear@6 501
nuclear@6 502 case CMD_D:
nuclear@6 503 case CMD_TR:
nuclear@6 504 {
nuclear@6 505 Vector3 c;
nuclear@6 506 if(parse_color(&c)) {
nuclear@6 507 mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
nuclear@6 508 }
nuclear@6 509 }
nuclear@6 510 break;
nuclear@6 511
nuclear@6 512 case CMD_MAP_KD:
nuclear@6 513 mat.tex_dif = parse_map();
nuclear@6 514 break;
nuclear@6 515
nuclear@6 516 default:
nuclear@6 517 break;
nuclear@6 518 }
nuclear@6 519 }
nuclear@6 520
nuclear@6 521 if(mat.name.length() > 0) {
nuclear@13 522 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 523 vmtl->push_back(mat);
nuclear@6 524 }
nuclear@6 525 return true;
nuclear@6 526 }
nuclear@6 527
nuclear@6 528 static int get_cmd(char *str)
nuclear@6 529 {
nuclear@6 530 char *s = str;
nuclear@8 531 while((*s = toupper(*s))) s++;
nuclear@6 532
nuclear@6 533 for(int i=0; cmd_names[i]; i++) {
nuclear@6 534 if(strcmp(str, cmd_names[i]) == 0) {
nuclear@6 535 return i;
nuclear@6 536 }
nuclear@6 537 }
nuclear@6 538 return CMD_UNK;
nuclear@6 539 }
nuclear@6 540
nuclear@6 541 static bool is_int(const char *str)
nuclear@6 542 {
nuclear@6 543 char *tmp;
nuclear@6 544 strtol(str, &tmp, 10);
nuclear@6 545 return tmp != str;
nuclear@6 546 }
nuclear@6 547
nuclear@6 548 static bool is_float(const char *str)
nuclear@6 549 {
nuclear@6 550 char *tmp;
nuclear@6 551 strtod(str, &tmp);
nuclear@6 552 return tmp != str;
nuclear@6 553 }
nuclear@6 554
nuclear@6 555 static bool parse_vec(Vector3 *vec)
nuclear@6 556 {
nuclear@6 557 for(int i=0; i<3; i++) {
nuclear@6 558 char *tok;
nuclear@6 559
nuclear@6 560 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 561 if(i < 2) {
nuclear@6 562 return false;
nuclear@6 563 }
nuclear@6 564 vec->z = 0.0;
nuclear@6 565 } else {
nuclear@6 566 float v = atof(tok);
nuclear@6 567
nuclear@6 568 switch(i) {
nuclear@6 569 case 0:
nuclear@6 570 vec->x = v;
nuclear@6 571 break;
nuclear@6 572 case 1:
nuclear@6 573 vec->y = v;
nuclear@6 574 break;
nuclear@6 575 case 2:
nuclear@6 576 vec->z = v;
nuclear@6 577 break;
nuclear@6 578 }
nuclear@6 579 }
nuclear@6 580 }
nuclear@6 581 return true;
nuclear@6 582 }
nuclear@6 583
nuclear@6 584 static bool parse_color(Vector3 *col)
nuclear@6 585 {
nuclear@6 586 for(int i=0; i<3; i++) {
nuclear@6 587 char *tok;
nuclear@6 588
nuclear@6 589 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 590 col->y = col->z = col->x;
nuclear@6 591 return i > 0 ? true : false;
nuclear@6 592 }
nuclear@6 593
nuclear@6 594 float v = atof(tok);
nuclear@6 595 switch(i) {
nuclear@6 596 case 0:
nuclear@6 597 col->x = v;
nuclear@6 598 break;
nuclear@6 599 case 1:
nuclear@6 600 col->y = v;
nuclear@6 601 break;
nuclear@6 602 case 2:
nuclear@6 603 col->z = v;
nuclear@6 604 break;
nuclear@6 605 }
nuclear@6 606 }
nuclear@6 607 return true;
nuclear@6 608 }
nuclear@6 609
nuclear@6 610 static bool parse_face(obj_face *face)
nuclear@6 611 {
nuclear@6 612 char *tok[] = {0, 0, 0, 0};
nuclear@6 613 face->elem = 0;
nuclear@6 614
nuclear@6 615 for(int i=0; i<4; i++) {
nuclear@6 616 if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
nuclear@6 617 if(i < 3) return false; // less than 3 verts? not a polygon
nuclear@6 618 } else {
nuclear@6 619 face->elem++;
nuclear@6 620 }
nuclear@6 621 }
nuclear@6 622
nuclear@6 623 for(int i=0; i<4; i++) {
nuclear@6 624 char *subtok = tok[i];
nuclear@6 625
nuclear@6 626 if(!subtok || !*subtok || !is_int(subtok)) {
nuclear@6 627 if(i < 3) {
nuclear@6 628 return false;
nuclear@6 629 }
nuclear@6 630 face->v[i] = INVALID_IDX;
nuclear@6 631 } else {
nuclear@6 632 face->v[i] = atoi(subtok);
nuclear@6 633 if(face->v[i] > 0) face->v[i]--; /* convert to 0-based */
nuclear@6 634 }
nuclear@6 635
nuclear@6 636 while(subtok && *subtok && *subtok != '/') {
nuclear@6 637 subtok++;
nuclear@6 638 }
nuclear@6 639 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 640 face->t[i] = atoi(subtok);
nuclear@6 641 if(face->t[i] > 0) face->t[i]--; /* convert to 0-based */
nuclear@6 642 } else {
nuclear@6 643 face->t[i] = INVALID_IDX;
nuclear@6 644 }
nuclear@6 645
nuclear@6 646 while(subtok && *subtok && *subtok != '/') {
nuclear@6 647 subtok++;
nuclear@6 648 }
nuclear@6 649 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 650 face->n[i] = atoi(subtok);
nuclear@6 651 if(face->n[i] > 0) face->n[i]--; /* convert to 0-based */
nuclear@6 652 } else {
nuclear@6 653 face->n[i] = INVALID_IDX;
nuclear@6 654 }
nuclear@6 655 }
nuclear@6 656
nuclear@6 657 return true;
nuclear@6 658 }
nuclear@6 659
nuclear@6 660 static const char *parse_map()
nuclear@6 661 {
nuclear@6 662 char *tok, *prev = 0;
nuclear@6 663
nuclear@6 664 while((tok = strtok(0, SEP))) {
nuclear@6 665 prev = tok;
nuclear@6 666 }
nuclear@6 667
nuclear@6 668 return prev ? prev : "";
nuclear@6 669 }
nuclear@6 670
nuclear@6 671 static bool find_file(char *res, int sz, const char *fname, const char *path, const char *mode)
nuclear@6 672 {
nuclear@6 673 FILE *fp;
nuclear@6 674 const char *beg, *end;
nuclear@6 675 int fnamelen = strlen(fname);
nuclear@6 676
nuclear@6 677 beg = path;
nuclear@6 678 while(beg && *beg) {
nuclear@6 679 end = beg;
nuclear@6 680 while(*end && *end != ':') {
nuclear@6 681 end++;
nuclear@6 682 }
nuclear@6 683
nuclear@13 684 int res_len = end - beg;
nuclear@13 685 char *pathname = (char*)alloca(res_len + fnamelen + 2);
nuclear@13 686 memcpy(pathname, beg, res_len);
nuclear@13 687 pathname[res_len] = 0;
John@14 688 if(res_len) {
John@14 689 strcat(pathname, "/");
John@14 690 }
nuclear@6 691 strcat(pathname, fname);
nuclear@6 692
nuclear@6 693 if((fp = fopen(pathname, mode))) {
nuclear@6 694 fclose(fp);
nuclear@6 695 strncpy(res, pathname, sz);
nuclear@6 696 return true;
nuclear@6 697 }
nuclear@6 698
nuclear@13 699 beg += res_len;
John@14 700 if(*beg == ':') beg++;
nuclear@6 701 }
nuclear@6 702 return false;
nuclear@6 703 }
nuclear@6 704
nuclear@6 705 static const char *dirname(const char *str)
nuclear@6 706 {
nuclear@6 707 static char buf[PATH_MAX];
nuclear@6 708
nuclear@6 709 if(!str || !*str) {
nuclear@6 710 strcpy(buf, ".");
nuclear@6 711 } else {
nuclear@6 712 strncpy(buf, str, PATH_MAX);
nuclear@6 713 char *ptr = strrchr(buf, '/');
nuclear@6 714
John@14 715 if(ptr && *ptr) {
John@14 716 *ptr = 0;
John@14 717 } else {
John@14 718 strcpy(buf, ".");
John@14 719 }
nuclear@6 720 }
nuclear@6 721 return buf;
nuclear@6 722 }