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annotate src/mesh.cc @ 14:29f9330cfa4b

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trying to debug the bloody thing
author John Tsiombikas
date Sat, 07 Aug 2010 03:36:36 +0100
parents 407935b73af3
children 754faf15ba36
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
John@14 128 int Scene::get_num_meshes() const
John@14 129 {
John@14 130 return (int)meshes.size();
John@14 131 }
John@14 132
nuclear@13 133 int Scene::get_num_faces() const
nuclear@13 134 {
nuclear@13 135 int num_faces = 0;
nuclear@13 136 for(size_t i=0; i<meshes.size(); i++) {
nuclear@13 137 num_faces += meshes[i]->faces.size();
nuclear@13 138 }
nuclear@13 139 printf("get_num_faces() = %d\n", num_faces);
nuclear@13 140 return num_faces;
nuclear@13 141 }
nuclear@13 142
John@14 143 int Scene::get_num_materials() const
John@14 144 {
John@14 145 return (int)matlib.size();
John@14 146 }
John@14 147
John@14 148 Material *Scene::get_materials()
John@14 149 {
John@14 150 if(matlib.empty()) {
John@14 151 return 0;
John@14 152 }
John@14 153 return &matlib[0];
John@14 154 }
John@14 155
John@14 156 const Material *Scene::get_materials() const
John@14 157 {
John@14 158 if(matlib.empty()) {
John@14 159 return 0;
John@14 160 }
John@14 161 return &matlib[0];
John@14 162 }
John@14 163
nuclear@6 164
nuclear@6 165 #define INVALID_IDX INT_MIN
nuclear@6 166
nuclear@6 167 #define SEP " \t\n\r\v"
nuclear@6 168 #define BUF_SZ 512
nuclear@6 169
nuclear@6 170 bool Scene::load(const char *fname)
nuclear@6 171 {
nuclear@6 172 FILE *fp;
nuclear@6 173
nuclear@6 174 if(!(fp = fopen(fname, "rb"))) {
nuclear@6 175 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@6 176 return false;
nuclear@6 177 }
nuclear@6 178
nuclear@6 179 bool res = load(fp);
nuclear@6 180 fclose(fp);
nuclear@6 181 return res;
nuclear@6 182 }
nuclear@6 183
nuclear@6 184 bool Scene::load(FILE *fp)
nuclear@6 185 {
nuclear@6 186 static int seq;
nuclear@6 187 char cur_name[16];
nuclear@6 188
nuclear@6 189 obj_file obj;
nuclear@8 190
nuclear@6 191 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 192 obj.cur_obj = cur_name;
nuclear@6 193
nuclear@6 194 int prev_cmd = 0, obj_added = 0;
nuclear@6 195 for(;;) {
nuclear@6 196 Vector3 vec;
nuclear@6 197 obj_face face;
nuclear@8 198
nuclear@6 199 char line[BUF_SZ];
nuclear@6 200 fgets(line, sizeof line, fp);
nuclear@6 201 if(feof(fp)) {
nuclear@6 202 break;
nuclear@6 203 }
nuclear@6 204
nuclear@6 205 char *tok;
nuclear@6 206 if(!(tok = strtok(line, SEP))) {
nuclear@6 207 continue; // ignore empty lines
nuclear@6 208 }
nuclear@6 209
nuclear@6 210 int cmd;
nuclear@6 211 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 212 continue; // ignore unknown commands ...
nuclear@6 213 }
nuclear@6 214
nuclear@6 215 switch(cmd) {
nuclear@6 216 case CMD_V:
nuclear@6 217 if(!parse_vec(&vec)) {
nuclear@6 218 continue;
nuclear@6 219 }
nuclear@6 220 obj.v.push_back(vec);
nuclear@6 221 break;
nuclear@6 222
nuclear@6 223 case CMD_VN:
nuclear@6 224 if(!parse_vec(&vec)) {
nuclear@6 225 continue;
nuclear@6 226 }
nuclear@6 227 obj.vn.push_back(vec);
nuclear@6 228 break;
nuclear@6 229
nuclear@6 230 case CMD_VT:
nuclear@6 231 if(!parse_vec(&vec)) {
nuclear@6 232 continue;
nuclear@6 233 }
nuclear@6 234 vec.y = 1.0 - vec.y;
nuclear@6 235 obj.vt.push_back(vec);
nuclear@6 236 break;
nuclear@6 237
nuclear@6 238 case CMD_O:
nuclear@6 239 case CMD_G:
nuclear@6 240 if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
nuclear@6 241 break; // just in case we've got both of them in a row
nuclear@6 242 }
nuclear@6 243 /* if we have any previous data, group them up, add the object
nuclear@6 244 * and continue with the new one...
nuclear@6 245 */
nuclear@6 246 if(!obj.f.empty()) {
nuclear@6 247 Mesh *mesh = cons_mesh(&obj);
nuclear@6 248 mesh->matid = matnames[obj.cur_mat];
nuclear@13 249 add_mesh(mesh);
nuclear@6 250 obj_added++;
nuclear@6 251
nuclear@6 252 obj.f.clear(); // clean the face list
nuclear@6 253 }
nuclear@6 254 if((tok = strtok(0, SEP))) {
nuclear@6 255 obj.cur_obj = tok;
nuclear@6 256 } else {
nuclear@6 257 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 258 obj.cur_obj = cur_name;
nuclear@6 259 }
nuclear@6 260 break;
nuclear@6 261
nuclear@6 262 case CMD_MTLLIB:
nuclear@6 263 if((tok = strtok(0, SEP))) {
nuclear@6 264 char path[PATH_MAX];
nuclear@6 265
nuclear@6 266 sprintf(path, ".:%s", dirname(tok));
nuclear@6 267 if(!find_file(path, PATH_MAX, tok, path)) {
nuclear@6 268 fprintf(stderr, "material library not found: %s\n", tok);
nuclear@6 269 continue;
nuclear@6 270 }
nuclear@6 271
nuclear@6 272 FILE *mfile;
nuclear@6 273 if(!(mfile = fopen(path, "rb"))) {
nuclear@6 274 fprintf(stderr, "failed to open material library: %s\n", path);
nuclear@6 275 continue;
nuclear@6 276 }
nuclear@6 277
nuclear@6 278 // load all materials of the mtl file into a vector
nuclear@6 279 vector<obj_mat> vmtl;
nuclear@6 280 if(!read_materials(mfile, &vmtl)) {
nuclear@6 281 continue;
nuclear@6 282 }
nuclear@6 283 fclose(mfile);
nuclear@6 284
nuclear@6 285 // and add them all to the scene
nuclear@6 286 for(size_t i=0; i<vmtl.size(); i++) {
nuclear@6 287 Material mat;
nuclear@6 288
nuclear@6 289 mat.kd[0] = vmtl[i].diffuse.x;
nuclear@6 290 mat.kd[1] = vmtl[i].diffuse.y;
nuclear@6 291 mat.kd[2] = vmtl[i].diffuse.z;
nuclear@6 292
nuclear@6 293 mat.ks[0] = vmtl[i].specular.x;
nuclear@6 294 mat.ks[1] = vmtl[i].specular.y;
nuclear@6 295 mat.ks[2] = vmtl[i].specular.z;
nuclear@6 296
nuclear@6 297 mat.kt = 1.0 - vmtl[i].alpha;
nuclear@6 298 mat.kr = 0.0; // TODO
nuclear@6 299 mat.spow = vmtl[i].shininess;
nuclear@8 300
nuclear@13 301 matlib.push_back(mat);
nuclear@6 302 matnames[vmtl[i].name] = i;
nuclear@6 303 }
nuclear@6 304 }
nuclear@6 305 break;
nuclear@6 306
nuclear@6 307 case CMD_USEMTL:
nuclear@6 308 if((tok = strtok(0, SEP))) {
nuclear@6 309 obj.cur_mat = tok;
nuclear@6 310 } else {
nuclear@6 311 obj.cur_mat = "";
nuclear@6 312 }
nuclear@6 313 break;
nuclear@6 314
nuclear@6 315 case CMD_F:
nuclear@6 316 if(!parse_face(&face)) {
nuclear@6 317 continue;
nuclear@6 318 }
nuclear@6 319
nuclear@6 320 // convert negative indices to regular indices
nuclear@6 321 for(int i=0; i<4; i++) {
nuclear@6 322 if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
nuclear@6 323 face.v[i] = obj.v.size() + face.v[i];
nuclear@6 324 }
nuclear@6 325 if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
nuclear@6 326 face.n[i] = obj.vn.size() + face.n[i];
nuclear@6 327 }
nuclear@6 328 if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
nuclear@6 329 face.t[i] = obj.vt.size() + face.t[i];
nuclear@6 330 }
nuclear@6 331 }
nuclear@6 332
nuclear@6 333 // break quads into triangles if needed
nuclear@6 334 obj.f.push_back(face);
nuclear@6 335 if(face.elem == 4) {
nuclear@6 336 face.v[1] = face.v[2];
nuclear@6 337 face.n[1] = face.n[2];
nuclear@6 338 face.t[1] = face.t[2];
nuclear@6 339
nuclear@6 340 face.v[2] = face.v[3];
nuclear@6 341 face.n[2] = face.n[3];
nuclear@6 342 face.t[2] = face.t[3];
nuclear@6 343
nuclear@6 344 obj.f.push_back(face);
nuclear@6 345 }
nuclear@6 346 break;
nuclear@6 347
nuclear@6 348 default:
nuclear@6 349 break; // ignore unknown commands
nuclear@6 350 }
nuclear@6 351
nuclear@6 352 prev_cmd = cmd;
nuclear@6 353 }
nuclear@6 354
nuclear@6 355 // reached end of file...
nuclear@6 356 if(!obj.f.empty()) {
nuclear@6 357 Mesh *mesh = cons_mesh(&obj);
nuclear@6 358 mesh->matid = matnames[obj.cur_mat];
nuclear@13 359 add_mesh(mesh);
nuclear@6 360 obj_added++;
nuclear@6 361 }
nuclear@6 362
nuclear@6 363 return obj_added > 0;
nuclear@6 364 }
nuclear@6 365
nuclear@6 366 static Mesh *cons_mesh(obj_file *obj)
nuclear@6 367 {
nuclear@6 368 Mesh *mesh;
nuclear@6 369
nuclear@6 370 // need at least one of each element
nuclear@6 371 bool added_norm = false, added_tc = false;
nuclear@6 372 if(obj->vn.empty()) {
nuclear@6 373 obj->vn.push_back(Vector3(0, 0, 0));
nuclear@6 374 added_norm = true;
nuclear@6 375 }
nuclear@6 376 if(obj->vt.empty()) {
nuclear@6 377 obj->vt.push_back(Vector3(0, 0, 0));
nuclear@6 378 added_tc = true;
nuclear@6 379 }
nuclear@6 380
nuclear@6 381 mesh = new Mesh;
nuclear@6 382
nuclear@6 383 for(size_t i=0; i<obj->f.size(); i++) {
nuclear@6 384 Face face;
nuclear@6 385
nuclear@6 386 for(int j=0; j<3; j++) {
nuclear@6 387 obj_face *f = &obj->f[i];
nuclear@6 388
nuclear@6 389 face.v[j].pos[0] = obj->v[f->v[j]].x;
nuclear@6 390 face.v[j].pos[1] = obj->v[f->v[j]].y;
nuclear@6 391 face.v[j].pos[2] = obj->v[f->v[j]].z;
nuclear@13 392 face.v[j].pos[3] = 0.0;
nuclear@6 393
nuclear@6 394 int nidx = f->n[j] < 0 ? 0 : f->n[j];
nuclear@6 395 face.v[j].normal[0] = obj->vn[nidx].x;
nuclear@6 396 face.v[j].normal[1] = obj->vn[nidx].y;
nuclear@6 397 face.v[j].normal[2] = obj->vn[nidx].z;
nuclear@13 398 face.v[j].normal[3] = 0.0;
nuclear@6 399
nuclear@6 400 int tidx = f->t[j] < 0 ? 0 : f->t[j];
nuclear@6 401 face.v[j].tex[0] = obj->vt[tidx].x;
nuclear@6 402 face.v[j].tex[1] = obj->vt[tidx].y;
nuclear@6 403 }
nuclear@13 404
nuclear@13 405 face.normal[0] = face.v[0].normal[0];
nuclear@13 406 face.normal[1] = face.v[1].normal[1];
nuclear@13 407 face.normal[2] = face.v[2].normal[2];
nuclear@13 408 face.normal[3] = 0.0;
nuclear@13 409
nuclear@6 410 mesh->faces.push_back(face);
nuclear@6 411 }
nuclear@6 412
nuclear@6 413 if(added_norm) {
nuclear@6 414 obj->vn.pop_back();
nuclear@6 415 }
nuclear@6 416 if(added_tc) {
nuclear@6 417 obj->vt.pop_back();
nuclear@6 418 }
nuclear@8 419
nuclear@6 420 return mesh;
nuclear@6 421 }
nuclear@6 422
nuclear@6 423 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl)
nuclear@6 424 {
nuclear@6 425 obj_mat mat;
nuclear@6 426
nuclear@6 427 for(;;) {
nuclear@6 428 char line[BUF_SZ];
nuclear@6 429 fgets(line, sizeof line, fp);
nuclear@6 430 if(feof(fp)) {
nuclear@6 431 break;
nuclear@6 432 }
nuclear@6 433
nuclear@6 434 char *tok;
nuclear@6 435 if(!(tok = strtok(line, SEP))) {
nuclear@6 436 continue;
nuclear@6 437 }
nuclear@6 438
nuclear@6 439 int cmd;
nuclear@6 440 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 441 continue;
nuclear@6 442 }
nuclear@6 443
nuclear@6 444 switch(cmd) {
nuclear@6 445 case CMD_NEWMTL:
nuclear@6 446 // add the previous material, and start a new one
nuclear@6 447 if(mat.name.length() > 0) {
nuclear@13 448 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 449 vmtl->push_back(mat);
nuclear@6 450 mat.reset();
nuclear@6 451 }
nuclear@6 452 if((tok = strtok(0, SEP))) {
nuclear@6 453 mat.name = tok;
nuclear@6 454 }
nuclear@6 455 break;
nuclear@6 456
nuclear@6 457 case CMD_KA:
nuclear@6 458 parse_color(&mat.ambient);
nuclear@6 459 break;
nuclear@6 460
nuclear@6 461 case CMD_KD:
nuclear@6 462 parse_color(&mat.diffuse);
nuclear@6 463 break;
nuclear@6 464
nuclear@6 465 case CMD_KS:
nuclear@6 466 parse_color(&mat.specular);
nuclear@6 467 break;
nuclear@6 468
nuclear@6 469 case CMD_NS:
nuclear@6 470 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 471 mat.shininess = atof(tok);
nuclear@6 472 }
nuclear@6 473 break;
nuclear@6 474
nuclear@6 475 case CMD_NI:
nuclear@6 476 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 477 mat.ior = atof(tok);
nuclear@6 478 }
nuclear@6 479 break;
nuclear@6 480
nuclear@6 481 case CMD_D:
nuclear@6 482 case CMD_TR:
nuclear@6 483 {
nuclear@6 484 Vector3 c;
nuclear@6 485 if(parse_color(&c)) {
nuclear@6 486 mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
nuclear@6 487 }
nuclear@6 488 }
nuclear@6 489 break;
nuclear@6 490
nuclear@6 491 case CMD_MAP_KD:
nuclear@6 492 mat.tex_dif = parse_map();
nuclear@6 493 break;
nuclear@6 494
nuclear@6 495 default:
nuclear@6 496 break;
nuclear@6 497 }
nuclear@6 498 }
nuclear@6 499
nuclear@6 500 if(mat.name.length() > 0) {
nuclear@13 501 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 502 vmtl->push_back(mat);
nuclear@6 503 }
nuclear@6 504 return true;
nuclear@6 505 }
nuclear@6 506
nuclear@6 507 static int get_cmd(char *str)
nuclear@6 508 {
nuclear@6 509 char *s = str;
nuclear@8 510 while((*s = toupper(*s))) s++;
nuclear@6 511
nuclear@6 512 for(int i=0; cmd_names[i]; i++) {
nuclear@6 513 if(strcmp(str, cmd_names[i]) == 0) {
nuclear@6 514 return i;
nuclear@6 515 }
nuclear@6 516 }
nuclear@6 517 return CMD_UNK;
nuclear@6 518 }
nuclear@6 519
nuclear@6 520 static bool is_int(const char *str)
nuclear@6 521 {
nuclear@6 522 char *tmp;
nuclear@6 523 strtol(str, &tmp, 10);
nuclear@6 524 return tmp != str;
nuclear@6 525 }
nuclear@6 526
nuclear@6 527 static bool is_float(const char *str)
nuclear@6 528 {
nuclear@6 529 char *tmp;
nuclear@6 530 strtod(str, &tmp);
nuclear@6 531 return tmp != str;
nuclear@6 532 }
nuclear@6 533
nuclear@6 534 static bool parse_vec(Vector3 *vec)
nuclear@6 535 {
nuclear@6 536 for(int i=0; i<3; i++) {
nuclear@6 537 char *tok;
nuclear@6 538
nuclear@6 539 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 540 if(i < 2) {
nuclear@6 541 return false;
nuclear@6 542 }
nuclear@6 543 vec->z = 0.0;
nuclear@6 544 } else {
nuclear@6 545 float v = atof(tok);
nuclear@6 546
nuclear@6 547 switch(i) {
nuclear@6 548 case 0:
nuclear@6 549 vec->x = v;
nuclear@6 550 break;
nuclear@6 551 case 1:
nuclear@6 552 vec->y = v;
nuclear@6 553 break;
nuclear@6 554 case 2:
nuclear@6 555 vec->z = v;
nuclear@6 556 break;
nuclear@6 557 }
nuclear@6 558 }
nuclear@6 559 }
nuclear@6 560 return true;
nuclear@6 561 }
nuclear@6 562
nuclear@6 563 static bool parse_color(Vector3 *col)
nuclear@6 564 {
nuclear@6 565 for(int i=0; i<3; i++) {
nuclear@6 566 char *tok;
nuclear@6 567
nuclear@6 568 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 569 col->y = col->z = col->x;
nuclear@6 570 return i > 0 ? true : false;
nuclear@6 571 }
nuclear@6 572
nuclear@6 573 float v = atof(tok);
nuclear@6 574 switch(i) {
nuclear@6 575 case 0:
nuclear@6 576 col->x = v;
nuclear@6 577 break;
nuclear@6 578 case 1:
nuclear@6 579 col->y = v;
nuclear@6 580 break;
nuclear@6 581 case 2:
nuclear@6 582 col->z = v;
nuclear@6 583 break;
nuclear@6 584 }
nuclear@6 585 }
nuclear@6 586 return true;
nuclear@6 587 }
nuclear@6 588
nuclear@6 589 static bool parse_face(obj_face *face)
nuclear@6 590 {
nuclear@6 591 char *tok[] = {0, 0, 0, 0};
nuclear@6 592 face->elem = 0;
nuclear@6 593
nuclear@6 594 for(int i=0; i<4; i++) {
nuclear@6 595 if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
nuclear@6 596 if(i < 3) return false; // less than 3 verts? not a polygon
nuclear@6 597 } else {
nuclear@6 598 face->elem++;
nuclear@6 599 }
nuclear@6 600 }
nuclear@6 601
nuclear@6 602 for(int i=0; i<4; i++) {
nuclear@6 603 char *subtok = tok[i];
nuclear@6 604
nuclear@6 605 if(!subtok || !*subtok || !is_int(subtok)) {
nuclear@6 606 if(i < 3) {
nuclear@6 607 return false;
nuclear@6 608 }
nuclear@6 609 face->v[i] = INVALID_IDX;
nuclear@6 610 } else {
nuclear@6 611 face->v[i] = atoi(subtok);
nuclear@6 612 if(face->v[i] > 0) face->v[i]--; /* convert to 0-based */
nuclear@6 613 }
nuclear@6 614
nuclear@6 615 while(subtok && *subtok && *subtok != '/') {
nuclear@6 616 subtok++;
nuclear@6 617 }
nuclear@6 618 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 619 face->t[i] = atoi(subtok);
nuclear@6 620 if(face->t[i] > 0) face->t[i]--; /* convert to 0-based */
nuclear@6 621 } else {
nuclear@6 622 face->t[i] = INVALID_IDX;
nuclear@6 623 }
nuclear@6 624
nuclear@6 625 while(subtok && *subtok && *subtok != '/') {
nuclear@6 626 subtok++;
nuclear@6 627 }
nuclear@6 628 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 629 face->n[i] = atoi(subtok);
nuclear@6 630 if(face->n[i] > 0) face->n[i]--; /* convert to 0-based */
nuclear@6 631 } else {
nuclear@6 632 face->n[i] = INVALID_IDX;
nuclear@6 633 }
nuclear@6 634 }
nuclear@6 635
nuclear@6 636 return true;
nuclear@6 637 }
nuclear@6 638
nuclear@6 639 static const char *parse_map()
nuclear@6 640 {
nuclear@6 641 char *tok, *prev = 0;
nuclear@6 642
nuclear@6 643 while((tok = strtok(0, SEP))) {
nuclear@6 644 prev = tok;
nuclear@6 645 }
nuclear@6 646
nuclear@6 647 return prev ? prev : "";
nuclear@6 648 }
nuclear@6 649
nuclear@6 650 static bool find_file(char *res, int sz, const char *fname, const char *path, const char *mode)
nuclear@6 651 {
nuclear@6 652 FILE *fp;
nuclear@6 653 const char *beg, *end;
nuclear@6 654 int fnamelen = strlen(fname);
nuclear@6 655
nuclear@6 656 beg = path;
nuclear@6 657 while(beg && *beg) {
nuclear@6 658 end = beg;
nuclear@6 659 while(*end && *end != ':') {
nuclear@6 660 end++;
nuclear@6 661 }
nuclear@6 662
nuclear@13 663 int res_len = end - beg;
nuclear@13 664 char *pathname = (char*)alloca(res_len + fnamelen + 2);
nuclear@13 665 memcpy(pathname, beg, res_len);
nuclear@13 666 pathname[res_len] = 0;
John@14 667 if(res_len) {
John@14 668 strcat(pathname, "/");
John@14 669 }
nuclear@6 670 strcat(pathname, fname);
nuclear@6 671
nuclear@6 672 if((fp = fopen(pathname, mode))) {
nuclear@6 673 fclose(fp);
nuclear@6 674 strncpy(res, pathname, sz);
nuclear@6 675 return true;
nuclear@6 676 }
nuclear@6 677
nuclear@13 678 beg += res_len;
John@14 679 if(*beg == ':') beg++;
nuclear@6 680 }
nuclear@6 681 return false;
nuclear@6 682 }
nuclear@6 683
nuclear@6 684 static const char *dirname(const char *str)
nuclear@6 685 {
nuclear@6 686 static char buf[PATH_MAX];
nuclear@6 687
nuclear@6 688 if(!str || !*str) {
nuclear@6 689 strcpy(buf, ".");
nuclear@6 690 } else {
nuclear@6 691 strncpy(buf, str, PATH_MAX);
nuclear@6 692 char *ptr = strrchr(buf, '/');
nuclear@6 693
John@14 694 if(ptr && *ptr) {
John@14 695 *ptr = 0;
John@14 696 } else {
John@14 697 strcpy(buf, ".");
John@14 698 }
nuclear@6 699 }
nuclear@6 700 return buf;
nuclear@6 701 }