erebus

annotate liberebus/src/scene.cc @ 28:4a0a288ffb27

find changesets by author, revision, files, or words in the commit message
phong/lafortune BRDF
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 06 Jun 2014 14:39:40 +0300
parents 56d504cc555a
children 9d6368850fe1
rev   line source
nuclear@19 1 #include <stdio.h>
nuclear@19 2 #include <stdlib.h>
nuclear@19 3 #include <string.h>
nuclear@4 4 #include "scene.h"
nuclear@19 5 #include "snode.h"
nuclear@19 6 #include "object.h"
nuclear@19 7 #include "geomobj.h"
nuclear@4 8
nuclear@8 9 // default enviromental parameters
nuclear@8 10 Environment::Environment()
nuclear@19 11 : bgcolor(0.01, 0.01, 0.01), ambient(0.01, 0.01, 0.01)
nuclear@8 12 {
nuclear@8 13 }
nuclear@8 14
nuclear@4 15 Scene::Scene()
nuclear@4 16 {
nuclear@4 17 active_cam = 0;
nuclear@4 18 root = new SceneNode;
nuclear@4 19 }
nuclear@4 20
nuclear@4 21 Scene::~Scene()
nuclear@4 22 {
nuclear@4 23 for(auto obj : objects) {
nuclear@4 24 delete obj;
nuclear@4 25 }
nuclear@4 26 for(auto node : nodes) {
nuclear@4 27 delete node;
nuclear@4 28 }
nuclear@4 29 delete root;
nuclear@4 30 }
nuclear@4 31
nuclear@8 32 void Scene::set_env(const Environment &env)
nuclear@8 33 {
nuclear@8 34 this->env = env;
nuclear@8 35 }
nuclear@8 36
nuclear@8 37 Environment &Scene::get_env()
nuclear@8 38 {
nuclear@8 39 return env;
nuclear@8 40 }
nuclear@8 41
nuclear@8 42 const Environment &Scene::get_env() const
nuclear@8 43 {
nuclear@8 44 return env;
nuclear@8 45 }
nuclear@8 46
nuclear@8 47 Color Scene::get_env_color() const
nuclear@8 48 {
nuclear@8 49 return env.bgcolor;
nuclear@8 50 }
nuclear@8 51
nuclear@8 52 Color Scene::get_env_color(const Ray &ray) const
nuclear@8 53 {
nuclear@8 54 // TODO
nuclear@8 55 return get_env_color();
nuclear@8 56 }
nuclear@8 57
nuclear@4 58 void Scene::add_object(Object *obj)
nuclear@4 59 {
nuclear@4 60 objects.push_back(obj);
nuclear@4 61 }
nuclear@4 62
nuclear@4 63 int Scene::get_object_count() const
nuclear@4 64 {
nuclear@4 65 return (int)objects.size();
nuclear@4 66 }
nuclear@4 67
nuclear@4 68 Object *Scene::get_object(int idx) const
nuclear@4 69 {
nuclear@4 70 return objects[idx];
nuclear@4 71 }
nuclear@4 72
nuclear@4 73 void Scene::add_node(SceneNode *node)
nuclear@4 74 {
nuclear@4 75 nodes.push_back(node);
nuclear@4 76
nuclear@4 77 if(!node->get_parent()) {
nuclear@4 78 root->add_child(node);
nuclear@4 79 }
nuclear@4 80 }
nuclear@4 81
nuclear@4 82 int Scene::get_node_count() const
nuclear@4 83 {
nuclear@4 84 return (int)nodes.size();
nuclear@4 85 }
nuclear@4 86
nuclear@4 87 SceneNode *Scene::get_node(int idx) const
nuclear@4 88 {
nuclear@4 89 return nodes[idx];
nuclear@4 90 }
nuclear@4 91
nuclear@4 92 void Scene::use_camera(Camera *cam)
nuclear@4 93 {
nuclear@4 94 active_cam = cam;
nuclear@4 95 }
nuclear@4 96
nuclear@4 97 Camera *Scene::get_active_camera() const
nuclear@4 98 {
nuclear@4 99 return active_cam;
nuclear@4 100 }
nuclear@4 101
nuclear@4 102 void Scene::update(long msec)
nuclear@4 103 {
nuclear@4 104 root->update(msec);
nuclear@4 105 }
nuclear@4 106
nuclear@4 107 bool Scene::intersect(const Ray &ray, RayHit *hit) const
nuclear@4 108 {
nuclear@4 109 return root->intersect(ray, hit);
nuclear@4 110 }
nuclear@4 111
nuclear@4 112 bool Scene::load(const char *fname)
nuclear@4 113 {
nuclear@19 114 FILE *fp = fopen(fname, "r");
nuclear@19 115 if(!fp) {
nuclear@19 116 fprintf(stderr, "failed to open scene file: %s\n", fname);
nuclear@19 117 return false;
nuclear@19 118 }
nuclear@19 119
nuclear@19 120 bool res = load(fp);
nuclear@19 121 fclose(fp);
nuclear@19 122 return res;
nuclear@4 123 }
nuclear@19 124
nuclear@19 125 static char *strip_wspace(char *str)
nuclear@19 126 {
nuclear@19 127 while(*str && isspace(*str)) str++;
nuclear@23 128
nuclear@23 129 char *comment = strchr(str, '#');
nuclear@23 130 if(comment) *comment = 0;
nuclear@23 131
nuclear@23 132 if(str) {
nuclear@23 133 char *end = str + strlen(str) - 1;
nuclear@23 134 while(end > str && isspace(*end)) end--;
nuclear@23 135 end[1] = 0;
nuclear@23 136 }
nuclear@23 137
nuclear@19 138 return str;
nuclear@19 139 }
nuclear@19 140
nuclear@19 141 bool Scene::load(FILE *fp)
nuclear@19 142 {
nuclear@28 143 static char buf[4096];
nuclear@28 144 int offset = 0;
nuclear@19 145
nuclear@28 146 while(fgets(buf + offset, sizeof buf - offset, fp)) {
nuclear@28 147 // handle line continuations
nuclear@28 148 int len = strlen(buf);
nuclear@28 149 if(strcmp(buf + len - 2, "\\\n") == 0 || strcmp(buf + len - 2, "\\\r") == 0) {
nuclear@28 150 offset = len - 2;
nuclear@28 151 continue;
nuclear@28 152 }
nuclear@28 153 if(strcmp(buf + len - 3, "\\\r\n") == 0) {
nuclear@28 154 offset = len - 3;
nuclear@28 155 continue;
nuclear@28 156 }
nuclear@28 157 offset = 0;
nuclear@28 158
nuclear@19 159 char *line = strip_wspace(buf);
nuclear@19 160 if(!line || !*line || *line == '#') {
nuclear@19 161 continue;
nuclear@19 162 }
nuclear@19 163
nuclear@19 164 std::vector<char*> cmd;
nuclear@19 165
nuclear@19 166 char *tok = 0;
nuclear@19 167 while((tok = strtok(tok ? 0 : line, " \t\v\n\r"))) {
nuclear@19 168 cmd.push_back(tok);
nuclear@19 169 }
nuclear@19 170 cmd.push_back(0);
nuclear@19 171
nuclear@19 172
nuclear@19 173 if(!proc_cmd((int)cmd.size() - 1, &cmd[0])) {
nuclear@19 174 return false;
nuclear@19 175 }
nuclear@19 176 }
nuclear@19 177
nuclear@19 178 return true;
nuclear@19 179 }
nuclear@19 180
nuclear@19 181 static int parse_vec(char **argv, float *vec)
nuclear@19 182 {
nuclear@19 183 int nelem = 0;
nuclear@19 184 char *endp;
nuclear@19 185
nuclear@19 186 for(int i=0; i<4; i++) {
nuclear@19 187 if(!argv[i]) break;
nuclear@19 188
nuclear@19 189 vec[nelem] = strtod(argv[i], &endp);
nuclear@19 190 if(endp == argv[i]) {
nuclear@19 191 break;
nuclear@19 192 }
nuclear@19 193 nelem++;
nuclear@19 194 }
nuclear@19 195 return nelem;
nuclear@19 196 }
nuclear@19 197
nuclear@22 198 static int parse_brdf(char **argv, Reflectance **brdf_ptr)
nuclear@22 199 {
nuclear@22 200 CompositeRefl *composite = 0;
nuclear@22 201 Reflectance *brdf = 0;
nuclear@22 202 float weight = 1.0;
nuclear@22 203 int i;
nuclear@22 204
nuclear@22 205 for(i=0; argv[i]; i++) {
nuclear@22 206 if(strcmp(argv[i], "-brdf") == 0) {
nuclear@22 207 if(strcmp(argv[++i], "lambert") == 0) {
nuclear@22 208 if(composite && brdf) {
nuclear@22 209 composite->add_brdf(brdf, weight);
nuclear@22 210 }
nuclear@22 211 brdf = new LambertRefl;
nuclear@22 212 if(!composite) break;
nuclear@22 213
nuclear@28 214 } else if(strcmp(argv[i], "phong") == 0) {
nuclear@28 215 if(composite && brdf) {
nuclear@28 216 composite->add_brdf(brdf, weight);
nuclear@28 217 }
nuclear@28 218 brdf = new PhongRefl;
nuclear@28 219 if(!composite) break;
nuclear@28 220
nuclear@22 221 } else if(strcmp(argv[i], "mirror") == 0) {
nuclear@22 222 if(composite && brdf) {
nuclear@22 223 composite->add_brdf(brdf, weight);
nuclear@22 224 }
nuclear@22 225 brdf = new MirrorRefl;
nuclear@22 226 if(!composite) break;
nuclear@22 227
nuclear@22 228 } else if(strcmp(argv[i], "composite") == 0) {
nuclear@22 229 if(composite) {
nuclear@22 230 fprintf(stderr, "can't have nested composite BRDFs\n");
nuclear@22 231 return -1;
nuclear@22 232 }
nuclear@22 233 composite = new CompositeRefl;
nuclear@22 234
nuclear@22 235 } else {
nuclear@22 236 --i;
nuclear@22 237 break;
nuclear@22 238 }
nuclear@22 239
nuclear@22 240 } else if(strcmp(argv[i], "-brdf-weight") == 0) {
nuclear@22 241 if(!composite) {
nuclear@22 242 fprintf(stderr, "-brdf-weight is invalid without a composite brdf\n");
nuclear@22 243 return -1;
nuclear@22 244 }
nuclear@22 245 char *endp;
nuclear@22 246 weight = strtod(argv[++i], &endp);
nuclear@22 247 if(endp == argv[i]) {
nuclear@22 248 fprintf(stderr, "-brdf-weight must be followed by a number\n");
nuclear@22 249 return -1;
nuclear@22 250 }
nuclear@22 251 } else {
nuclear@22 252 --i;
nuclear@22 253 break;
nuclear@22 254 }
nuclear@22 255 }
nuclear@22 256
nuclear@22 257 if(composite && brdf) {
nuclear@22 258 composite->add_brdf(brdf, weight);
nuclear@22 259 *brdf_ptr = composite;
nuclear@22 260 } else {
nuclear@22 261 *brdf_ptr = brdf;
nuclear@22 262 }
nuclear@22 263 return i;
nuclear@22 264 }
nuclear@22 265
nuclear@19 266 static SceneNode *proc_object(Object *obj, int argc, char **argv)
nuclear@19 267 {
nuclear@19 268 float vec[4];
nuclear@19 269 SceneNode *node = new SceneNode(obj);
nuclear@19 270 GeomObject *gobj = (GeomObject*)obj;
nuclear@19 271
nuclear@19 272 for(int i=1; i<argc; i++) {
nuclear@19 273 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 274 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 275 if(nelem < 3) {
nuclear@19 276 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 277 goto err;
nuclear@19 278 }
nuclear@19 279 node->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 280 i += 3;
nuclear@19 281
nuclear@19 282 } else if(strcmp(argv[i], "-rotation") == 0) {
nuclear@19 283 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 284 if(nelem < 4) {
nuclear@19 285 fprintf(stderr, "-rotation must be followed by axis vector and angle\n");
nuclear@19 286 goto err;
nuclear@19 287 }
nuclear@19 288 node->set_rotation(Quaternion(Vector3(vec[0], vec[1], vec[2]), vec[3]));
nuclear@19 289 i += 4;
nuclear@19 290
nuclear@19 291 } else if(strcmp(argv[i], "-scaling") == 0) {
nuclear@19 292 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 293 Vector3 s;
nuclear@19 294 if(nelem == 1) {
nuclear@19 295 s.x = s.y = s.z = vec[0];
nuclear@19 296 } else if(nelem == 3) {
nuclear@19 297 s = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 298 } else {
nuclear@19 299 fprintf(stderr, "-scaling must be followed by 1 or 3 numbers\n");
nuclear@19 300 goto err;
nuclear@19 301 }
nuclear@19 302 node->set_scaling(s);
nuclear@19 303 i += nelem;
nuclear@19 304
nuclear@19 305 } else if(strcmp(argv[i], "-diffuse") == 0) {
nuclear@19 306 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 307 if(nelem < 3) {
nuclear@19 308 fprintf(stderr, "-diffuse must be followed by a color (r g b)\n");
nuclear@19 309 goto err;
nuclear@19 310 }
nuclear@19 311 gobj->mtl.set_attrib("diffuse", Color(vec[0], vec[1], vec[2]));
nuclear@19 312 i += 3;
nuclear@19 313
nuclear@19 314 } else if(strcmp(argv[i], "-specular") == 0) {
nuclear@19 315 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 316 if(nelem < 3) {
nuclear@19 317 fprintf(stderr, "-specular must be followed by a color\n");
nuclear@19 318 goto err;
nuclear@19 319 }
nuclear@19 320 gobj->mtl.set_attrib("specular", Color(vec[0], vec[1], vec[2]));
nuclear@19 321 i += 3;
nuclear@19 322
nuclear@19 323 } else if(strcmp(argv[i], "-emissive") == 0) {
nuclear@19 324 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 325 Color emissive;
nuclear@19 326 if(nelem == 1) {
nuclear@19 327 emissive = Vector3(1, 1, 1);
nuclear@19 328 } else if(nelem == 3) {
nuclear@19 329 emissive = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 330 } else {
nuclear@19 331 fprintf(stderr, "-emissive must be followed by an intensity or a color\n");
nuclear@19 332 goto err;
nuclear@19 333 }
nuclear@19 334 i += nelem;
nuclear@19 335 gobj->mtl.set_attrib("emissive", emissive);
nuclear@19 336
nuclear@22 337 } else if(strcmp(argv[i], "-brdf") == 0) {
nuclear@22 338 int nelem = parse_brdf(argv + i, &gobj->brdf);
nuclear@22 339 if(nelem == -1) {
nuclear@22 340 goto err;
nuclear@22 341 }
nuclear@22 342 i += nelem;
nuclear@22 343
nuclear@19 344 } else {
nuclear@19 345 fprintf(stderr, "unrecognized %s option: %s\n", argv[0], argv[i]);
nuclear@19 346 goto err;
nuclear@19 347 }
nuclear@19 348 }
nuclear@19 349
nuclear@19 350 return node;
nuclear@19 351 err:
nuclear@19 352 delete node;
nuclear@19 353 return 0;
nuclear@19 354 }
nuclear@19 355
nuclear@19 356 static Camera *proc_camera(int argc, char **argv)
nuclear@19 357 {
nuclear@19 358 float vec[4];
nuclear@19 359 TargetCamera *cam = new TargetCamera;
nuclear@19 360
nuclear@19 361 for(int i=1; i<argc; i++) {
nuclear@19 362 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 363 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 364 if(nelem < 3) {
nuclear@19 365 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 366 goto err;
nuclear@19 367 }
nuclear@19 368 cam->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 369 i += 3;
nuclear@19 370
nuclear@19 371 } else if(strcmp(argv[i], "-target") == 0) {
nuclear@19 372 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 373 if(nelem < 3) {
nuclear@19 374 fprintf(stderr, "-target must be followed by 3 numbers\n");
nuclear@19 375 goto err;
nuclear@19 376 }
nuclear@19 377 cam->set_target(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 378 i += 3;
nuclear@19 379
nuclear@19 380 } else if(strcmp(argv[i], "-fov") == 0) {
nuclear@19 381 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 382 if(nelem < 1) {
nuclear@19 383 fprintf(stderr, "-fov must be followed by the field of view in degrees\n");
nuclear@19 384 goto err;
nuclear@19 385 }
nuclear@19 386 cam->set_fov(vec[0]);
nuclear@19 387 i += 1;
nuclear@19 388
nuclear@19 389 } else {
nuclear@19 390 fprintf(stderr, "unrecognized camera option: %s\n", argv[i]);
nuclear@19 391 goto err;
nuclear@19 392 }
nuclear@19 393 }
nuclear@19 394 return cam;
nuclear@19 395
nuclear@19 396 err:
nuclear@19 397 delete cam;
nuclear@19 398 return 0;
nuclear@19 399 }
nuclear@19 400
nuclear@19 401 bool Scene::proc_cmd(int argc, char **argv)
nuclear@19 402 {
nuclear@19 403 Object *obj = 0;
nuclear@19 404 SceneNode *node = 0;
nuclear@19 405
nuclear@19 406 if(strcmp(argv[0], "sphere") == 0) {
nuclear@19 407 obj = new Sphere;
nuclear@19 408 node = proc_object(obj, argc, argv);
nuclear@19 409
nuclear@19 410 } else if(strcmp(argv[0], "box") == 0) {
nuclear@19 411 obj = new Box;
nuclear@19 412 node = proc_object(obj, argc, argv);
nuclear@19 413
nuclear@19 414 } else if(strcmp(argv[0], "mesh") == 0) {
nuclear@19 415 fprintf(stderr, "meshes not implemented yet\n");
nuclear@19 416 return false;
nuclear@19 417
nuclear@19 418 } else if(strcmp(argv[0], "camera") == 0) {
nuclear@19 419 Camera *cam = proc_camera(argc, argv);
nuclear@19 420 if(!cam) {
nuclear@19 421 return false;
nuclear@19 422 }
nuclear@19 423 use_camera(cam);
nuclear@19 424
nuclear@19 425 } else {
nuclear@19 426 fprintf(stderr, "unknown command: %s\n", argv[0]);
nuclear@19 427 return false;
nuclear@19 428 }
nuclear@19 429
nuclear@19 430 if(obj) {
nuclear@19 431 if(!node) {
nuclear@19 432 return false;
nuclear@19 433 }
nuclear@19 434 add_object(obj);
nuclear@19 435 add_node(node);
nuclear@19 436 }
nuclear@19 437
nuclear@19 438 return true;
nuclear@19 439 }