erebus

annotate liberebus/src/scene.cc @ 22:11cdaa510201

find changesets by author, revision, files, or words in the commit message
added -brdf arguments in scene construction commands
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 29 May 2014 03:35:04 +0300
parents ea95b62dbc87
children 56d504cc555a
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@19 128 return str;
nuclear@19 129 }
nuclear@19 130
nuclear@19 131 bool Scene::load(FILE *fp)
nuclear@19 132 {
nuclear@22 133 static char buf[256];
nuclear@19 134
nuclear@19 135 while(fgets(buf, sizeof buf, fp)) {
nuclear@19 136 char *line = strip_wspace(buf);
nuclear@19 137 if(!line || !*line || *line == '#') {
nuclear@19 138 continue;
nuclear@19 139 }
nuclear@19 140
nuclear@19 141 std::vector<char*> cmd;
nuclear@19 142
nuclear@19 143 char *tok = 0;
nuclear@19 144 while((tok = strtok(tok ? 0 : line, " \t\v\n\r"))) {
nuclear@19 145 cmd.push_back(tok);
nuclear@19 146 }
nuclear@19 147 cmd.push_back(0);
nuclear@19 148
nuclear@19 149
nuclear@19 150 if(!proc_cmd((int)cmd.size() - 1, &cmd[0])) {
nuclear@19 151 return false;
nuclear@19 152 }
nuclear@19 153 }
nuclear@19 154
nuclear@19 155 return true;
nuclear@19 156 }
nuclear@19 157
nuclear@19 158 static int parse_vec(char **argv, float *vec)
nuclear@19 159 {
nuclear@19 160 int nelem = 0;
nuclear@19 161 char *endp;
nuclear@19 162
nuclear@19 163 for(int i=0; i<4; i++) {
nuclear@19 164 if(!argv[i]) break;
nuclear@19 165
nuclear@19 166 vec[nelem] = strtod(argv[i], &endp);
nuclear@19 167 if(endp == argv[i]) {
nuclear@19 168 break;
nuclear@19 169 }
nuclear@19 170 nelem++;
nuclear@19 171 }
nuclear@19 172 return nelem;
nuclear@19 173 }
nuclear@19 174
nuclear@22 175 static int parse_brdf(char **argv, Reflectance **brdf_ptr)
nuclear@22 176 {
nuclear@22 177 CompositeRefl *composite = 0;
nuclear@22 178 Reflectance *brdf = 0;
nuclear@22 179 float weight = 1.0;
nuclear@22 180 int i;
nuclear@22 181
nuclear@22 182 for(i=0; argv[i]; i++) {
nuclear@22 183 if(strcmp(argv[i], "-brdf") == 0) {
nuclear@22 184 if(strcmp(argv[++i], "lambert") == 0) {
nuclear@22 185 if(composite && brdf) {
nuclear@22 186 composite->add_brdf(brdf, weight);
nuclear@22 187 }
nuclear@22 188 brdf = new LambertRefl;
nuclear@22 189 if(!composite) break;
nuclear@22 190
nuclear@22 191 } else if(strcmp(argv[i], "mirror") == 0) {
nuclear@22 192 if(composite && brdf) {
nuclear@22 193 composite->add_brdf(brdf, weight);
nuclear@22 194 }
nuclear@22 195 brdf = new MirrorRefl;
nuclear@22 196 if(!composite) break;
nuclear@22 197
nuclear@22 198 } else if(strcmp(argv[i], "composite") == 0) {
nuclear@22 199 if(composite) {
nuclear@22 200 fprintf(stderr, "can't have nested composite BRDFs\n");
nuclear@22 201 return -1;
nuclear@22 202 }
nuclear@22 203 composite = new CompositeRefl;
nuclear@22 204
nuclear@22 205 } else {
nuclear@22 206 --i;
nuclear@22 207 break;
nuclear@22 208 }
nuclear@22 209
nuclear@22 210 } else if(strcmp(argv[i], "-brdf-weight") == 0) {
nuclear@22 211 if(!composite) {
nuclear@22 212 fprintf(stderr, "-brdf-weight is invalid without a composite brdf\n");
nuclear@22 213 return -1;
nuclear@22 214 }
nuclear@22 215 char *endp;
nuclear@22 216 weight = strtod(argv[++i], &endp);
nuclear@22 217 if(endp == argv[i]) {
nuclear@22 218 fprintf(stderr, "-brdf-weight must be followed by a number\n");
nuclear@22 219 return -1;
nuclear@22 220 }
nuclear@22 221 } else {
nuclear@22 222 --i;
nuclear@22 223 break;
nuclear@22 224 }
nuclear@22 225 }
nuclear@22 226
nuclear@22 227 if(composite && brdf) {
nuclear@22 228 composite->add_brdf(brdf, weight);
nuclear@22 229 *brdf_ptr = composite;
nuclear@22 230 } else {
nuclear@22 231 *brdf_ptr = brdf;
nuclear@22 232 }
nuclear@22 233 return i;
nuclear@22 234 }
nuclear@22 235
nuclear@19 236 static SceneNode *proc_object(Object *obj, int argc, char **argv)
nuclear@19 237 {
nuclear@19 238 float vec[4];
nuclear@19 239 SceneNode *node = new SceneNode(obj);
nuclear@19 240 GeomObject *gobj = (GeomObject*)obj;
nuclear@19 241
nuclear@19 242 for(int i=1; i<argc; i++) {
nuclear@19 243 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 244 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 245 if(nelem < 3) {
nuclear@19 246 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 247 goto err;
nuclear@19 248 }
nuclear@19 249 node->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 250 i += 3;
nuclear@19 251
nuclear@19 252 } else if(strcmp(argv[i], "-rotation") == 0) {
nuclear@19 253 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 254 if(nelem < 4) {
nuclear@19 255 fprintf(stderr, "-rotation must be followed by axis vector and angle\n");
nuclear@19 256 goto err;
nuclear@19 257 }
nuclear@19 258 node->set_rotation(Quaternion(Vector3(vec[0], vec[1], vec[2]), vec[3]));
nuclear@19 259 i += 4;
nuclear@19 260
nuclear@19 261 } else if(strcmp(argv[i], "-scaling") == 0) {
nuclear@19 262 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 263 Vector3 s;
nuclear@19 264 if(nelem == 1) {
nuclear@19 265 s.x = s.y = s.z = vec[0];
nuclear@19 266 } else if(nelem == 3) {
nuclear@19 267 s = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 268 } else {
nuclear@19 269 fprintf(stderr, "-scaling must be followed by 1 or 3 numbers\n");
nuclear@19 270 goto err;
nuclear@19 271 }
nuclear@19 272 node->set_scaling(s);
nuclear@19 273 i += nelem;
nuclear@19 274
nuclear@19 275 } else if(strcmp(argv[i], "-diffuse") == 0) {
nuclear@19 276 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 277 if(nelem < 3) {
nuclear@19 278 fprintf(stderr, "-diffuse must be followed by a color (r g b)\n");
nuclear@19 279 goto err;
nuclear@19 280 }
nuclear@19 281 gobj->mtl.set_attrib("diffuse", Color(vec[0], vec[1], vec[2]));
nuclear@19 282 i += 3;
nuclear@19 283
nuclear@19 284 } else if(strcmp(argv[i], "-specular") == 0) {
nuclear@19 285 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 286 if(nelem < 3) {
nuclear@19 287 fprintf(stderr, "-specular must be followed by a color\n");
nuclear@19 288 goto err;
nuclear@19 289 }
nuclear@19 290 gobj->mtl.set_attrib("specular", Color(vec[0], vec[1], vec[2]));
nuclear@19 291 i += 3;
nuclear@19 292
nuclear@19 293 } else if(strcmp(argv[i], "-emissive") == 0) {
nuclear@19 294 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 295 Color emissive;
nuclear@19 296 if(nelem == 1) {
nuclear@19 297 emissive = Vector3(1, 1, 1);
nuclear@19 298 } else if(nelem == 3) {
nuclear@19 299 emissive = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 300 } else {
nuclear@19 301 fprintf(stderr, "-emissive must be followed by an intensity or a color\n");
nuclear@19 302 goto err;
nuclear@19 303 }
nuclear@19 304 i += nelem;
nuclear@19 305 gobj->mtl.set_attrib("emissive", emissive);
nuclear@19 306
nuclear@22 307 } else if(strcmp(argv[i], "-brdf") == 0) {
nuclear@22 308 int nelem = parse_brdf(argv + i, &gobj->brdf);
nuclear@22 309 if(nelem == -1) {
nuclear@22 310 goto err;
nuclear@22 311 }
nuclear@22 312 i += nelem;
nuclear@22 313
nuclear@19 314 } else {
nuclear@19 315 fprintf(stderr, "unrecognized %s option: %s\n", argv[0], argv[i]);
nuclear@19 316 goto err;
nuclear@19 317 }
nuclear@19 318 }
nuclear@19 319
nuclear@19 320 return node;
nuclear@19 321 err:
nuclear@19 322 delete node;
nuclear@19 323 return 0;
nuclear@19 324 }
nuclear@19 325
nuclear@19 326 static Camera *proc_camera(int argc, char **argv)
nuclear@19 327 {
nuclear@19 328 float vec[4];
nuclear@19 329 TargetCamera *cam = new TargetCamera;
nuclear@19 330
nuclear@19 331 for(int i=1; i<argc; i++) {
nuclear@19 332 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 333 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 334 if(nelem < 3) {
nuclear@19 335 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 336 goto err;
nuclear@19 337 }
nuclear@19 338 cam->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 339 i += 3;
nuclear@19 340
nuclear@19 341 } else if(strcmp(argv[i], "-target") == 0) {
nuclear@19 342 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 343 if(nelem < 3) {
nuclear@19 344 fprintf(stderr, "-target must be followed by 3 numbers\n");
nuclear@19 345 goto err;
nuclear@19 346 }
nuclear@19 347 cam->set_target(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 348 i += 3;
nuclear@19 349
nuclear@19 350 } else if(strcmp(argv[i], "-fov") == 0) {
nuclear@19 351 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 352 if(nelem < 1) {
nuclear@19 353 fprintf(stderr, "-fov must be followed by the field of view in degrees\n");
nuclear@19 354 goto err;
nuclear@19 355 }
nuclear@19 356 cam->set_fov(vec[0]);
nuclear@19 357 i += 1;
nuclear@19 358
nuclear@19 359 } else {
nuclear@19 360 fprintf(stderr, "unrecognized camera option: %s\n", argv[i]);
nuclear@19 361 goto err;
nuclear@19 362 }
nuclear@19 363 }
nuclear@19 364 return cam;
nuclear@19 365
nuclear@19 366 err:
nuclear@19 367 delete cam;
nuclear@19 368 return 0;
nuclear@19 369 }
nuclear@19 370
nuclear@19 371 bool Scene::proc_cmd(int argc, char **argv)
nuclear@19 372 {
nuclear@19 373 Object *obj = 0;
nuclear@19 374 SceneNode *node = 0;
nuclear@19 375
nuclear@19 376 if(strcmp(argv[0], "sphere") == 0) {
nuclear@19 377 obj = new Sphere;
nuclear@19 378 node = proc_object(obj, argc, argv);
nuclear@19 379
nuclear@19 380 } else if(strcmp(argv[0], "box") == 0) {
nuclear@19 381 obj = new Box;
nuclear@19 382 node = proc_object(obj, argc, argv);
nuclear@19 383
nuclear@19 384 } else if(strcmp(argv[0], "mesh") == 0) {
nuclear@19 385 fprintf(stderr, "meshes not implemented yet\n");
nuclear@19 386 return false;
nuclear@19 387
nuclear@19 388 } else if(strcmp(argv[0], "camera") == 0) {
nuclear@19 389 Camera *cam = proc_camera(argc, argv);
nuclear@19 390 if(!cam) {
nuclear@19 391 return false;
nuclear@19 392 }
nuclear@19 393 use_camera(cam);
nuclear@19 394
nuclear@19 395 } else {
nuclear@19 396 fprintf(stderr, "unknown command: %s\n", argv[0]);
nuclear@19 397 return false;
nuclear@19 398 }
nuclear@19 399
nuclear@19 400 if(obj) {
nuclear@19 401 if(!node) {
nuclear@19 402 return false;
nuclear@19 403 }
nuclear@19 404 add_object(obj);
nuclear@19 405 add_node(node);
nuclear@19 406 }
nuclear@19 407
nuclear@19 408 return true;
nuclear@19 409 }