erebus

annotate liberebus/src/scene.cc @ 19:6204e4d3f445

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scene loading
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 27 May 2014 07:43:55 +0300
parents e2d9bf168a41
children ea95b62dbc87
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@19 133 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 printf("token: %s\n", tok);
nuclear@19 146 cmd.push_back(tok);
nuclear@19 147 }
nuclear@19 148 cmd.push_back(0);
nuclear@19 149
nuclear@19 150
nuclear@19 151 if(!proc_cmd((int)cmd.size() - 1, &cmd[0])) {
nuclear@19 152 return false;
nuclear@19 153 }
nuclear@19 154 }
nuclear@19 155
nuclear@19 156 return true;
nuclear@19 157 }
nuclear@19 158
nuclear@19 159 static int parse_vec(char **argv, float *vec)
nuclear@19 160 {
nuclear@19 161 int nelem = 0;
nuclear@19 162 char *endp;
nuclear@19 163
nuclear@19 164 for(int i=0; i<4; i++) {
nuclear@19 165 if(!argv[i]) break;
nuclear@19 166
nuclear@19 167 vec[nelem] = strtod(argv[i], &endp);
nuclear@19 168 if(endp == argv[i]) {
nuclear@19 169 break;
nuclear@19 170 }
nuclear@19 171 nelem++;
nuclear@19 172 }
nuclear@19 173 return nelem;
nuclear@19 174 }
nuclear@19 175
nuclear@19 176 static SceneNode *proc_object(Object *obj, int argc, char **argv)
nuclear@19 177 {
nuclear@19 178 float vec[4];
nuclear@19 179 SceneNode *node = new SceneNode(obj);
nuclear@19 180 GeomObject *gobj = (GeomObject*)obj;
nuclear@19 181
nuclear@19 182 for(int i=1; i<argc; i++) {
nuclear@19 183 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 184 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 185 if(nelem < 3) {
nuclear@19 186 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 187 goto err;
nuclear@19 188 }
nuclear@19 189 node->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 190 i += 3;
nuclear@19 191
nuclear@19 192 } else if(strcmp(argv[i], "-rotation") == 0) {
nuclear@19 193 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 194 if(nelem < 4) {
nuclear@19 195 fprintf(stderr, "-rotation must be followed by axis vector and angle\n");
nuclear@19 196 goto err;
nuclear@19 197 }
nuclear@19 198 node->set_rotation(Quaternion(Vector3(vec[0], vec[1], vec[2]), vec[3]));
nuclear@19 199 i += 4;
nuclear@19 200
nuclear@19 201 } else if(strcmp(argv[i], "-scaling") == 0) {
nuclear@19 202 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 203 Vector3 s;
nuclear@19 204 if(nelem == 1) {
nuclear@19 205 s.x = s.y = s.z = vec[0];
nuclear@19 206 } else if(nelem == 3) {
nuclear@19 207 s = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 208 } else {
nuclear@19 209 fprintf(stderr, "-scaling must be followed by 1 or 3 numbers\n");
nuclear@19 210 goto err;
nuclear@19 211 }
nuclear@19 212 node->set_scaling(s);
nuclear@19 213 i += nelem;
nuclear@19 214
nuclear@19 215 } else if(strcmp(argv[i], "-diffuse") == 0) {
nuclear@19 216 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 217 if(nelem < 3) {
nuclear@19 218 fprintf(stderr, "-diffuse must be followed by a color (r g b)\n");
nuclear@19 219 goto err;
nuclear@19 220 }
nuclear@19 221 gobj->mtl.set_attrib("diffuse", Color(vec[0], vec[1], vec[2]));
nuclear@19 222 i += 3;
nuclear@19 223
nuclear@19 224 } else if(strcmp(argv[i], "-specular") == 0) {
nuclear@19 225 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 226 if(nelem < 3) {
nuclear@19 227 fprintf(stderr, "-specular must be followed by a color\n");
nuclear@19 228 goto err;
nuclear@19 229 }
nuclear@19 230 gobj->mtl.set_attrib("specular", Color(vec[0], vec[1], vec[2]));
nuclear@19 231 i += 3;
nuclear@19 232
nuclear@19 233 } else if(strcmp(argv[i], "-emissive") == 0) {
nuclear@19 234 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 235 Color emissive;
nuclear@19 236 if(nelem == 1) {
nuclear@19 237 emissive = Vector3(1, 1, 1);
nuclear@19 238 } else if(nelem == 3) {
nuclear@19 239 emissive = Vector3(vec[0], vec[1], vec[2]);
nuclear@19 240 } else {
nuclear@19 241 fprintf(stderr, "-emissive must be followed by an intensity or a color\n");
nuclear@19 242 goto err;
nuclear@19 243 }
nuclear@19 244 i += nelem;
nuclear@19 245 gobj->mtl.set_attrib("emissive", emissive);
nuclear@19 246
nuclear@19 247 } else {
nuclear@19 248 fprintf(stderr, "unrecognized %s option: %s\n", argv[0], argv[i]);
nuclear@19 249 goto err;
nuclear@19 250 }
nuclear@19 251 }
nuclear@19 252
nuclear@19 253 return node;
nuclear@19 254 err:
nuclear@19 255 delete node;
nuclear@19 256 return 0;
nuclear@19 257 }
nuclear@19 258
nuclear@19 259 static Camera *proc_camera(int argc, char **argv)
nuclear@19 260 {
nuclear@19 261 float vec[4];
nuclear@19 262 TargetCamera *cam = new TargetCamera;
nuclear@19 263
nuclear@19 264 for(int i=1; i<argc; i++) {
nuclear@19 265 if(strcmp(argv[i], "-position") == 0) {
nuclear@19 266 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 267 if(nelem < 3) {
nuclear@19 268 fprintf(stderr, "-position must be followed by 3 numbers\n");
nuclear@19 269 goto err;
nuclear@19 270 }
nuclear@19 271 cam->set_position(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 272 i += 3;
nuclear@19 273
nuclear@19 274 } else if(strcmp(argv[i], "-target") == 0) {
nuclear@19 275 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 276 if(nelem < 3) {
nuclear@19 277 fprintf(stderr, "-target must be followed by 3 numbers\n");
nuclear@19 278 goto err;
nuclear@19 279 }
nuclear@19 280 cam->set_target(Vector3(vec[0], vec[1], vec[2]));
nuclear@19 281 i += 3;
nuclear@19 282
nuclear@19 283 } else if(strcmp(argv[i], "-fov") == 0) {
nuclear@19 284 int nelem = parse_vec(argv + i + 1, vec);
nuclear@19 285 if(nelem < 1) {
nuclear@19 286 fprintf(stderr, "-fov must be followed by the field of view in degrees\n");
nuclear@19 287 goto err;
nuclear@19 288 }
nuclear@19 289 cam->set_fov(vec[0]);
nuclear@19 290 i += 1;
nuclear@19 291
nuclear@19 292 } else {
nuclear@19 293 fprintf(stderr, "unrecognized camera option: %s\n", argv[i]);
nuclear@19 294 goto err;
nuclear@19 295 }
nuclear@19 296 }
nuclear@19 297 return cam;
nuclear@19 298
nuclear@19 299 err:
nuclear@19 300 delete cam;
nuclear@19 301 return 0;
nuclear@19 302 }
nuclear@19 303
nuclear@19 304 bool Scene::proc_cmd(int argc, char **argv)
nuclear@19 305 {
nuclear@19 306 Object *obj = 0;
nuclear@19 307 SceneNode *node = 0;
nuclear@19 308
nuclear@19 309 if(strcmp(argv[0], "sphere") == 0) {
nuclear@19 310 obj = new Sphere;
nuclear@19 311 node = proc_object(obj, argc, argv);
nuclear@19 312
nuclear@19 313 } else if(strcmp(argv[0], "box") == 0) {
nuclear@19 314 obj = new Box;
nuclear@19 315 node = proc_object(obj, argc, argv);
nuclear@19 316
nuclear@19 317 } else if(strcmp(argv[0], "mesh") == 0) {
nuclear@19 318 fprintf(stderr, "meshes not implemented yet\n");
nuclear@19 319 return false;
nuclear@19 320
nuclear@19 321 } else if(strcmp(argv[0], "camera") == 0) {
nuclear@19 322 Camera *cam = proc_camera(argc, argv);
nuclear@19 323 if(!cam) {
nuclear@19 324 return false;
nuclear@19 325 }
nuclear@19 326 use_camera(cam);
nuclear@19 327
nuclear@19 328 } else {
nuclear@19 329 fprintf(stderr, "unknown command: %s\n", argv[0]);
nuclear@19 330 return false;
nuclear@19 331 }
nuclear@19 332
nuclear@19 333 if(obj) {
nuclear@19 334 if(!node) {
nuclear@19 335 return false;
nuclear@19 336 }
nuclear@19 337 add_object(obj);
nuclear@19 338 add_node(node);
nuclear@19 339 }
nuclear@19 340
nuclear@19 341 return true;
nuclear@19 342 }