view3d

annotate src/main.c @ 11:1a3799ff443a

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merged fullscreen and minor edit
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 04 Sep 2012 05:11:13 +0300
parents 5562a637e5aa
children
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <math.h>
nuclear@0 4
nuclear@0 5 #include <GL/glew.h>
nuclear@0 6 #ifndef __APPLE__
nuclear@0 7 #include <GL/glut.h>
nuclear@0 8 #else
nuclear@0 9 #include <GLUT/glut.h>
nuclear@0 10 #endif
nuclear@0 11
nuclear@0 12 #include "scene.h"
nuclear@0 13
nuclear@0 14 void disp(void);
nuclear@0 15 void render(unsigned int msec);
nuclear@0 16 void proj_matrix(float eye);
nuclear@0 17 void view_matrix(float eye);
nuclear@0 18
nuclear@9 19 void idle(void);
nuclear@0 20 void reshape(int x, int y);
nuclear@0 21 void keyb(unsigned char key, int x, int y);
nuclear@0 22 void keyb_up(unsigned char key, int x, int y);
nuclear@0 23 void mouse(int bn, int state, int x, int y);
nuclear@0 24 void motion(int x, int y);
nuclear@0 25 void sball_motion(int x, int y, int z);
nuclear@0 26 void sball_rotate(int x, int y, int z);
nuclear@0 27 void sball_button(int bn, int state);
nuclear@0 28 int parse_args(int argc, char **argv);
nuclear@0 29
nuclear@0 30 int win_width, win_height;
nuclear@0 31 int stereo;
nuclear@0 32 int flip_winding;
nuclear@3 33 int auto_rot;
nuclear@0 34 float cam_theta, cam_phi, cam_dist = 10;
nuclear@0 35 float near_clip = 0.5;
nuclear@0 36 float far_clip = 1000.0;
nuclear@0 37 float fov = M_PI / 4.0;
nuclear@0 38 float stereo_focus_dist = 1.0;
nuclear@0 39 float stereo_eye_sep = 1.0 / 30.0;
nuclear@0 40
nuclear@3 41 int verbose = 0;
nuclear@3 42
nuclear@0 43 struct scene scn;
nuclear@0 44
nuclear@0 45 int main(int argc, char **argv)
nuclear@0 46 {
nuclear@4 47 float amb[] = {0.01, 0.01, 0.01, 1};
nuclear@3 48 float ldir[] = {-1, 1, 1, 0};
nuclear@0 49 float dx, dy, dz, diag;
nuclear@0 50
nuclear@8 51
nuclear@0 52 glutInitWindowSize(800, 600);
nuclear@0 53 glutInit(&argc, argv);
nuclear@0 54 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE | (stereo ? GLUT_STEREO : 0));
nuclear@4 55 glutCreateWindow("OpenGL 3D viewer");
nuclear@0 56
nuclear@0 57 glutDisplayFunc(disp);
nuclear@0 58 glutReshapeFunc(reshape);
nuclear@0 59 glutKeyboardFunc(keyb);
nuclear@0 60 glutKeyboardUpFunc(keyb_up);
nuclear@0 61 glutMouseFunc(mouse);
nuclear@0 62 glutMotionFunc(motion);
nuclear@0 63 glutSpaceballMotionFunc(sball_motion);
nuclear@0 64 glutSpaceballRotateFunc(sball_rotate);
nuclear@0 65 glutSpaceballButtonFunc(sball_button);
nuclear@3 66 if(auto_rot) {
nuclear@9 67 glutIdleFunc(idle);
nuclear@3 68 }
nuclear@0 69
nuclear@0 70 glewInit();
nuclear@0 71
nuclear@4 72 glEnable(GL_NORMALIZE);
nuclear@0 73 glEnable(GL_DEPTH_TEST);
nuclear@0 74 glEnable(GL_CULL_FACE);
nuclear@0 75 glEnable(GL_LIGHTING);
nuclear@0 76 glEnable(GL_LIGHT0);
nuclear@0 77 glLightfv(GL_LIGHT0, GL_POSITION, ldir);
nuclear@0 78
nuclear@4 79 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amb);
nuclear@4 80
nuclear@8 81
nuclear@8 82 init_scene(&scn);
nuclear@8 83 if(parse_args(argc, argv) == -1) {
nuclear@0 84 return 1;
nuclear@0 85 }
nuclear@8 86 if(verbose) {
nuclear@8 87 printf("scene bounds: %.2f %.2f %.2f -> %.2f %.2f %.2f\n", scn.bbox.min[0], scn.bbox.min[1],
nuclear@8 88 scn.bbox.min[2], scn.bbox.max[0], scn.bbox.max[1], scn.bbox.max[2]);
nuclear@8 89 }
nuclear@8 90
nuclear@0 91 dx = scn.bbox.max[0] - scn.bbox.min[0];
nuclear@0 92 dy = scn.bbox.max[1] - scn.bbox.min[1];
nuclear@0 93 dz = scn.bbox.max[2] - scn.bbox.min[2];
nuclear@0 94 diag = sqrt(dx * dx + dy * dy + dz * dz);
nuclear@0 95 cam_dist = diag / fov;
nuclear@0 96 printf("camera distance: %f\n", cam_dist);
nuclear@0 97
nuclear@0 98 glutMainLoop();
nuclear@0 99 return 0;
nuclear@0 100 }
nuclear@0 101
nuclear@0 102
nuclear@0 103 void disp(void)
nuclear@0 104 {
nuclear@0 105 unsigned int tm = glutGet(GLUT_ELAPSED_TIME);
nuclear@0 106
nuclear@0 107 if(stereo) {
nuclear@0 108 glDrawBuffer(GL_BACK_LEFT);
nuclear@0 109 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 110
nuclear@0 111 glMatrixMode(GL_PROJECTION);
nuclear@0 112 glLoadIdentity();
nuclear@0 113 proj_matrix(-1);
nuclear@0 114 glMatrixMode(GL_MODELVIEW);
nuclear@0 115 glLoadIdentity();
nuclear@0 116 view_matrix(-1);
nuclear@0 117
nuclear@0 118 render(tm);
nuclear@0 119
nuclear@0 120 glDrawBuffer(GL_BACK_RIGHT);
nuclear@0 121 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 122
nuclear@0 123 glMatrixMode(GL_PROJECTION);
nuclear@0 124 glLoadIdentity();
nuclear@0 125 proj_matrix(1);
nuclear@0 126 glMatrixMode(GL_MODELVIEW);
nuclear@0 127 glLoadIdentity();
nuclear@0 128 view_matrix(1);
nuclear@0 129
nuclear@0 130 render(tm);
nuclear@0 131 } else {
nuclear@0 132 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 133
nuclear@0 134 glMatrixMode(GL_PROJECTION);
nuclear@0 135 glLoadIdentity();
nuclear@0 136 proj_matrix(0);
nuclear@0 137 glMatrixMode(GL_MODELVIEW);
nuclear@0 138 glLoadIdentity();
nuclear@0 139 view_matrix(0);
nuclear@0 140
nuclear@0 141 render(tm);
nuclear@0 142 }
nuclear@0 143
nuclear@0 144 glutSwapBuffers();
nuclear@0 145 }
nuclear@0 146
nuclear@0 147 void render(unsigned int msec)
nuclear@0 148 {
nuclear@0 149 if(auto_rot) {
nuclear@0 150 glRotatef(msec / 10, 0, 1, 0);
nuclear@0 151 }
nuclear@0 152 render_scene(&scn);
nuclear@0 153 }
nuclear@0 154
nuclear@0 155 void proj_matrix(float eye)
nuclear@0 156 {
nuclear@0 157 float vfov_rad = fov;
nuclear@0 158 float top = near_clip * tan(vfov_rad * 0.5);
nuclear@0 159 float right = top * (float)win_width / (float)win_height;
nuclear@0 160
nuclear@0 161 float frust_shift = eye * (stereo_eye_sep * 0.5 * near_clip / stereo_focus_dist);
nuclear@0 162
nuclear@0 163 glFrustum(-right + frust_shift, right + frust_shift, -top, top, near_clip, far_clip);
nuclear@0 164 }
nuclear@0 165
nuclear@0 166 void view_matrix(float eye)
nuclear@0 167 {
nuclear@0 168 float offs = stereo_eye_sep * eye * 0.5;
nuclear@0 169 glTranslatef(offs, 0, 0);
nuclear@0 170
nuclear@0 171 glTranslatef(0, 0, -cam_dist);
nuclear@0 172 glRotatef(cam_phi, 1, 0, 0);
nuclear@0 173 glRotatef(cam_theta, 0, 1, 0);
nuclear@0 174 }
nuclear@0 175
nuclear@9 176 void idle(void)
nuclear@9 177 {
nuclear@9 178 glutPostRedisplay();
nuclear@9 179 }
nuclear@9 180
nuclear@0 181 void reshape(int x, int y)
nuclear@0 182 {
nuclear@0 183 glViewport(0, 0, x, y);
nuclear@0 184 win_width = x;
nuclear@0 185 win_height = y;
nuclear@0 186 }
nuclear@0 187
nuclear@0 188 static int stereo_shift_key;
nuclear@0 189
nuclear@0 190 void keyb(unsigned char key, int x, int y)
nuclear@0 191 {
nuclear@0 192 switch(key) {
nuclear@0 193 case 'q':
nuclear@0 194 case 27:
nuclear@0 195 exit(0);
nuclear@0 196
nuclear@0 197 case 's':
nuclear@0 198 stereo_shift_key = 1;
nuclear@0 199 break;
nuclear@0 200
nuclear@0 201 case 'c':
nuclear@0 202 {
nuclear@0 203 static int flip;
nuclear@0 204 glFrontFace((++flip & 1) ? GL_CW : GL_CCW);
nuclear@0 205 glutPostRedisplay();
nuclear@0 206 }
nuclear@0 207 break;
nuclear@0 208
nuclear@0 209 case 'C':
nuclear@0 210 {
nuclear@0 211 static int cull = 1;
nuclear@0 212 if(++cull & 1) {
nuclear@0 213 glEnable(GL_CULL_FACE);
nuclear@0 214 } else {
nuclear@0 215 glDisable(GL_CULL_FACE);
nuclear@0 216 }
nuclear@0 217 glutPostRedisplay();
nuclear@0 218 }
nuclear@0 219 break;
nuclear@0 220
nuclear@0 221 case 'w':
nuclear@0 222 {
nuclear@0 223 static int wire;
nuclear@0 224 glPolygonMode(GL_FRONT_AND_BACK, (++wire & 1) ? GL_LINE : GL_FILL);
nuclear@0 225 glutPostRedisplay();
nuclear@0 226 }
nuclear@0 227 break;
nuclear@0 228
nuclear@0 229 case 'l':
nuclear@0 230 {
nuclear@0 231 static int lit = 1;
nuclear@0 232 if(++lit & 1) {
nuclear@0 233 glEnable(GL_LIGHTING);
nuclear@0 234 } else {
nuclear@0 235 glDisable(GL_LIGHTING);
nuclear@0 236 }
nuclear@0 237 glutPostRedisplay();
nuclear@0 238 }
nuclear@0 239 break;
nuclear@0 240
nuclear@0 241 case ' ':
nuclear@0 242 auto_rot = !auto_rot;
nuclear@0 243 if(auto_rot) {
nuclear@9 244 glutIdleFunc(idle);
nuclear@0 245 } else {
nuclear@0 246 glutIdleFunc(0);
nuclear@0 247 }
nuclear@0 248 glutPostRedisplay();
nuclear@0 249 break;
nuclear@0 250
nuclear@5 251 case 'f':
nuclear@5 252 {
nuclear@5 253 static int fullscr;
nuclear@9 254 static int orig_xsz, orig_ysz;
nuclear@5 255 if(++fullscr & 1) {
nuclear@9 256 int vp[4];
nuclear@9 257 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@9 258 orig_xsz = vp[2];
nuclear@9 259 orig_ysz = vp[3];
nuclear@5 260 glutFullScreen();
nuclear@5 261 } else {
nuclear@9 262 glutReshapeWindow(orig_xsz, orig_ysz);
nuclear@9 263 glutPositionWindow(20, 40);
nuclear@5 264 }
nuclear@5 265 }
nuclear@5 266 break;
nuclear@5 267
nuclear@5 268 {
nuclear@5 269 static float bgval;
nuclear@5 270 case '=':
nuclear@5 271 bgval += 0.1;
nuclear@5 272 if(bgval > 1.0)
nuclear@5 273 bgval = 1.0;
nuclear@5 274 glClearColor(bgval, bgval, bgval, 1.0);
nuclear@5 275 glutPostRedisplay();
nuclear@5 276 break;
nuclear@5 277
nuclear@5 278 case '-':
nuclear@5 279 bgval -= 0.1;
nuclear@5 280 if(bgval < 0.0)
nuclear@5 281 bgval = 0.0;
nuclear@5 282 glClearColor(bgval, bgval, bgval, 1.0);
nuclear@5 283 glutPostRedisplay();
nuclear@5 284 break;
nuclear@5 285 }
nuclear@5 286
nuclear@0 287 default:
nuclear@0 288 break;
nuclear@0 289 }
nuclear@0 290 }
nuclear@0 291
nuclear@0 292 void keyb_up(unsigned char key, int x, int y)
nuclear@0 293 {
nuclear@0 294 switch(key) {
nuclear@0 295 case 's':
nuclear@0 296 stereo_shift_key = 0;
nuclear@0 297 break;
nuclear@0 298
nuclear@0 299 default:
nuclear@0 300 break;
nuclear@0 301 }
nuclear@0 302 }
nuclear@0 303
nuclear@0 304
nuclear@0 305 static int bnstate[32];
nuclear@0 306 static int prev_x, prev_y;
nuclear@0 307 void mouse(int bn, int state, int x, int y)
nuclear@0 308 {
nuclear@0 309 prev_x = x;
nuclear@0 310 prev_y = y;
nuclear@0 311 bnstate[bn - GLUT_LEFT_BUTTON] = state == GLUT_DOWN ? 1 : 0;
nuclear@0 312 }
nuclear@0 313
nuclear@0 314 void motion(int x, int y)
nuclear@0 315 {
nuclear@0 316 int dx = x - prev_x;
nuclear@0 317 int dy = y - prev_y;
nuclear@0 318 prev_x = x;
nuclear@0 319 prev_y = y;
nuclear@0 320
nuclear@0 321 if(stereo_shift_key && dy != 0) {
nuclear@0 322 stereo_focus_dist += dy * 0.1;
nuclear@0 323 stereo_eye_sep = stereo_focus_dist / 30.0;
nuclear@0 324 glutPostRedisplay();
nuclear@0 325 return;
nuclear@0 326 }
nuclear@0 327
nuclear@0 328 if(bnstate[0]) {
nuclear@0 329 cam_theta += dx * 0.5;
nuclear@0 330 cam_phi += dy * 0.5;
nuclear@0 331
nuclear@0 332 if(cam_phi < -90)
nuclear@0 333 cam_phi = -90;
nuclear@0 334 if(cam_phi > 90)
nuclear@0 335 cam_phi = 90;
nuclear@0 336
nuclear@0 337 glutPostRedisplay();
nuclear@0 338 }
nuclear@0 339 if(bnstate[2]) {
nuclear@0 340 cam_dist += dy * 0.1;
nuclear@0 341 glutPostRedisplay();
nuclear@0 342 }
nuclear@0 343 }
nuclear@0 344
nuclear@0 345 void sball_motion(int x, int y, int z)
nuclear@0 346 {
nuclear@0 347 }
nuclear@0 348
nuclear@0 349 void sball_rotate(int x, int y, int z)
nuclear@0 350 {
nuclear@0 351 cam_theta += y * 0.05;
nuclear@0 352 cam_phi += x * 0.05;
nuclear@0 353
nuclear@0 354 if(cam_phi < -90)
nuclear@0 355 cam_phi = -90;
nuclear@0 356 if(cam_phi > 90)
nuclear@0 357 cam_phi = 90;
nuclear@0 358
nuclear@0 359 glutPostRedisplay();
nuclear@0 360 }
nuclear@0 361
nuclear@0 362 void sball_button(int bn, int state)
nuclear@0 363 {
nuclear@0 364 }
nuclear@0 365
nuclear@0 366 int parse_args(int argc, char **argv)
nuclear@0 367 {
nuclear@8 368 int i, num_loaded = 0;
nuclear@0 369
nuclear@0 370 for(i=1; i<argc; i++) {
nuclear@0 371 if(argv[i][0] == '-') {
nuclear@0 372 if(argv[i][2] != 0)
nuclear@0 373 goto inval;
nuclear@0 374 switch(argv[i][1]) {
nuclear@0 375 case 's':
nuclear@0 376 stereo = 1;
nuclear@0 377 break;
nuclear@0 378
nuclear@0 379 case 'c':
nuclear@0 380 flip_winding = 1;
nuclear@0 381 break;
nuclear@0 382
nuclear@3 383 case 'v':
nuclear@3 384 verbose = !verbose;
nuclear@3 385 break;
nuclear@3 386
nuclear@0 387 default:
nuclear@0 388 goto inval;
nuclear@0 389 }
nuclear@0 390 } else {
nuclear@8 391 if((load_scene(&scn, argv[i])) == -1) {
nuclear@8 392 fprintf(stderr, "failed to load: %s\n", argv[1]);
nuclear@0 393 return -1;
nuclear@0 394 }
nuclear@8 395 num_loaded++;
nuclear@0 396 }
nuclear@0 397 }
nuclear@0 398
nuclear@8 399 if(num_loaded == 0) {
nuclear@0 400 fprintf(stderr, "you must pass the filename of a scene to open\n");
nuclear@0 401 return -1;
nuclear@0 402 }
nuclear@0 403
nuclear@0 404 return 0;
nuclear@0 405
nuclear@0 406 inval:
nuclear@0 407 fprintf(stderr, "invalid argument: %s\n", argv[i]);
nuclear@0 408 return -1;
nuclear@0 409 }