oculus1

annotate src/main.cc @ 10:b2abb08c8f94

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proper FPS-style vr tracking
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 20 Sep 2013 06:49:39 +0300
parents b66b54a68dfd
children 39ec672a5158
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@1 3 #include <string.h>
nuclear@0 4 #include <assert.h>
nuclear@8 5 #include "opengl.h"
nuclear@1 6 #include "vr.h"
nuclear@0 7 #include "camera.h"
nuclear@0 8
nuclear@0 9 static bool init();
nuclear@0 10 static void cleanup();
nuclear@0 11 static void disp();
nuclear@9 12 static void draw_scene();
nuclear@0 13 static void idle();
nuclear@0 14 static void reshape(int x, int y);
nuclear@0 15 static void keyb(unsigned char key, int x, int y);
nuclear@8 16 static void keyup(unsigned char key, int x, int y);
nuclear@8 17 static void mouse(int bn, int st, int x, int y);
nuclear@8 18 static void motion(int x, int y);
nuclear@8 19 static void passive(int x, int y);
nuclear@0 20 static void sball_rotate(int rx, int ry, int rz);
nuclear@1 21 static bool parse_args(int argc, char **argv);
nuclear@0 22
nuclear@10 23 static VRFpsCamera cam;
nuclear@0 24 static int width, height;
nuclear@1 25 static bool use_vr = false;
nuclear@8 26 static bool mouselook = false;
nuclear@8 27
nuclear@8 28 static bool keystate[256];
nuclear@8 29
nuclear@0 30
nuclear@0 31 int main(int argc, char **argv)
nuclear@0 32 {
nuclear@3 33 glutInitWindowSize(1280, 800);
nuclear@0 34 glutInit(&argc, argv);
nuclear@1 35
nuclear@1 36 if(!parse_args(argc, argv)) {
nuclear@1 37 return 1;
nuclear@1 38 }
nuclear@1 39
nuclear@9 40 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE | GLUT_MULTISAMPLE);
nuclear@0 41 glutCreateWindow("oculus test 01");
nuclear@0 42
nuclear@0 43 glutDisplayFunc(disp);
nuclear@0 44 glutIdleFunc(idle);
nuclear@0 45 glutReshapeFunc(reshape);
nuclear@0 46 glutKeyboardFunc(keyb);
nuclear@8 47 glutKeyboardUpFunc(keyup);
nuclear@8 48 glutMouseFunc(mouse);
nuclear@8 49 glutMotionFunc(motion);
nuclear@0 50 glutSpaceballRotateFunc(sball_rotate);
nuclear@0 51
nuclear@0 52 if(!init()) {
nuclear@0 53 return 1;
nuclear@0 54 }
nuclear@0 55 atexit(cleanup);
nuclear@0 56
nuclear@0 57 glutMainLoop();
nuclear@0 58 return 0;
nuclear@0 59 }
nuclear@0 60
nuclear@0 61 static bool init()
nuclear@0 62 {
nuclear@9 63 glewInit(); // this must be first
nuclear@9 64
nuclear@9 65 if(GLEW_ARB_multisample) {
nuclear@9 66 glEnable(GL_MULTISAMPLE);
nuclear@9 67 }
nuclear@8 68
nuclear@0 69 glEnable(GL_DEPTH_TEST);
nuclear@0 70 glEnable(GL_LIGHTING);
nuclear@0 71 glEnable(GL_CULL_FACE);
nuclear@0 72
nuclear@0 73 glEnable(GL_LIGHT0);
nuclear@0 74 glEnable(GL_LIGHTING);
nuclear@0 75
nuclear@9 76 cam.input_move(0, 1.75, 0);
nuclear@9 77
nuclear@1 78 if(vr_init(VR_INIT_OCULUS) == -1) {
nuclear@5 79 return false;
nuclear@0 80 }
nuclear@0 81 return true;
nuclear@0 82 }
nuclear@0 83
nuclear@0 84 static void cleanup()
nuclear@0 85 {
nuclear@1 86 vr_shutdown();
nuclear@0 87 }
nuclear@0 88
nuclear@0 89 static void disp()
nuclear@0 90 {
nuclear@4 91 unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@4 92
nuclear@0 93 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 94
nuclear@0 95 glMatrixMode(GL_PROJECTION);
nuclear@0 96 glLoadIdentity();
nuclear@0 97 gluPerspective(45.0, (float)width / (float)height, 0.5, 500.0);
nuclear@0 98
nuclear@0 99 glMatrixMode(GL_MODELVIEW);
nuclear@9 100 glLoadIdentity();
nuclear@0 101
nuclear@10 102 cam.track_vr();
nuclear@9 103 cam.use_inverse();
nuclear@9 104
nuclear@9 105 draw_scene();
nuclear@9 106
nuclear@9 107 glutSwapBuffers();
nuclear@9 108 assert(glGetError() == GL_NO_ERROR);
nuclear@9 109 }
nuclear@9 110
nuclear@9 111 static void draw_teapot()
nuclear@9 112 {
nuclear@9 113 static int tealist;
nuclear@9 114
nuclear@9 115 if(!tealist) {
nuclear@9 116 tealist = glGenLists(1);
nuclear@9 117 glNewList(tealist, GL_COMPILE);
nuclear@9 118 glutSolidTeapot(1.0);
nuclear@9 119 glEndList();
nuclear@9 120 }
nuclear@9 121
nuclear@9 122 glFrontFace(GL_CW);
nuclear@9 123 glCallList(tealist);
nuclear@9 124 glFrontFace(GL_CCW);
nuclear@9 125 }
nuclear@9 126
nuclear@9 127 void draw_grid(float size, float spacing)
nuclear@9 128 {
nuclear@9 129 int num_lines = size / spacing;
nuclear@9 130 float dist = size / 2.0;
nuclear@9 131
nuclear@9 132 glPushAttrib(GL_ENABLE_BIT | GL_LINE_BIT);
nuclear@9 133 glDisable(GL_LIGHTING);
nuclear@9 134
nuclear@9 135 glLineWidth(1.0);
nuclear@9 136
nuclear@9 137 glBegin(GL_LINES);
nuclear@9 138 glColor3f(0.4, 0.4, 0.4);
nuclear@9 139
nuclear@9 140 float x = -dist;
nuclear@9 141 for(int i=0; i<=num_lines; i++) {
nuclear@9 142 if(i != num_lines / 2) {
nuclear@9 143 glVertex3f(-dist, 0, x);
nuclear@9 144 glVertex3f(dist, 0, x);
nuclear@9 145 glVertex3f(x, 0, -dist);
nuclear@9 146 glVertex3f(x, 0, dist);
nuclear@9 147 }
nuclear@9 148 x += spacing;
nuclear@9 149 }
nuclear@9 150 glEnd();
nuclear@9 151
nuclear@9 152 glLineWidth(2.0);
nuclear@9 153
nuclear@9 154 glBegin(GL_LINES);
nuclear@9 155 glColor3f(1.0, 0, 0);
nuclear@9 156 glVertex3f(-dist, 0, 0);
nuclear@9 157 glVertex3f(dist, 0, 0);
nuclear@9 158 glColor3f(0, 1.0, 0);
nuclear@9 159 glVertex3f(0, 0, -dist);
nuclear@9 160 glVertex3f(0, 0, dist);
nuclear@9 161 glEnd();
nuclear@9 162
nuclear@9 163 glPopAttrib();
nuclear@9 164 }
nuclear@9 165
nuclear@9 166
nuclear@9 167 static void draw_scene()
nuclear@9 168 {
nuclear@0 169 float lpos[] = {0, 60, 0, 1};
nuclear@0 170 glLightfv(GL_LIGHT0, GL_POSITION, lpos);
nuclear@0 171
nuclear@9 172 static Vector2 teapos[] = {
nuclear@9 173 Vector2(-8, 8), Vector2(8, 8), Vector2(8, -8), Vector2(-8, -8)
nuclear@9 174 };
nuclear@8 175
nuclear@9 176 for(int i=0; i<4; i++) {
nuclear@9 177 glPushMatrix();
nuclear@9 178 glTranslatef(teapos[i].x, 0, teapos[i].y);
nuclear@9 179 draw_teapot();
nuclear@9 180 glPopMatrix();
nuclear@9 181 }
nuclear@0 182
nuclear@9 183 draw_grid(100.0, 2.5);
nuclear@0 184 }
nuclear@0 185
nuclear@0 186 static void idle()
nuclear@0 187 {
nuclear@0 188 glutPostRedisplay();
nuclear@0 189 }
nuclear@0 190
nuclear@0 191
nuclear@0 192 static void reshape(int x, int y)
nuclear@0 193 {
nuclear@0 194 width = x;
nuclear@0 195 height = y;
nuclear@0 196 }
nuclear@0 197
nuclear@0 198 static void keyb(unsigned char key, int x, int y)
nuclear@0 199 {
nuclear@0 200 switch(key) {
nuclear@0 201 case 27:
nuclear@0 202 exit(0);
nuclear@8 203
nuclear@8 204 case 'm':
nuclear@8 205 mouselook = !mouselook;
nuclear@8 206 if(mouselook) {
nuclear@8 207 glutPassiveMotionFunc(passive);
nuclear@8 208 glutSetCursor(GLUT_CURSOR_NONE);
nuclear@8 209 glutWarpPointer(width / 2, height / 2);
nuclear@8 210 } else {
nuclear@8 211 glutPassiveMotionFunc(0);
nuclear@8 212 glutSetCursor(GLUT_CURSOR_INHERIT);
nuclear@8 213 }
nuclear@8 214 break;
nuclear@0 215 }
nuclear@8 216
nuclear@8 217 keystate[key] = true;
nuclear@8 218 glutPostRedisplay();
nuclear@8 219 }
nuclear@8 220
nuclear@8 221 static void keyup(unsigned char key, int x, int y)
nuclear@8 222 {
nuclear@8 223 keystate[key] = false;
nuclear@8 224 glutPostRedisplay();
nuclear@8 225 }
nuclear@8 226
nuclear@8 227 static bool bnstate[32];
nuclear@8 228 static int prev_x, prev_y;
nuclear@8 229
nuclear@8 230 static void mouse(int bn, int st, int x, int y)
nuclear@8 231 {
nuclear@8 232 prev_x = x;
nuclear@8 233 prev_y = y;
nuclear@8 234 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@8 235 }
nuclear@8 236
nuclear@8 237 static void motion(int x, int y)
nuclear@8 238 {
nuclear@8 239 if(mouselook) {
nuclear@8 240 // just call passive, it does what we need
nuclear@8 241 passive(x, y);
nuclear@8 242 }
nuclear@8 243 }
nuclear@8 244
nuclear@8 245 static void passive(int x, int y)
nuclear@8 246 {
nuclear@8 247 // no need to test mouselook; this callback is only set when mouselook is enabled
nuclear@8 248 int center_x = width / 2;
nuclear@8 249 int center_y = height / 2;
nuclear@8 250
nuclear@8 251 int dx = x - center_x;
nuclear@8 252 int dy = y - center_y;
nuclear@8 253
nuclear@8 254 if(!dx && !dy) {
nuclear@8 255 return;
nuclear@8 256 }
nuclear@8 257
nuclear@9 258 float dtheta_deg = dy * 0.1;
nuclear@9 259 float dphi_deg = dx * 0.1;
nuclear@9 260
nuclear@9 261 cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
nuclear@9 262
nuclear@8 263 glutPostRedisplay();
nuclear@8 264 glutWarpPointer(center_x, center_y);
nuclear@0 265 }
nuclear@0 266
nuclear@0 267 static void sball_rotate(int rx, int ry, int rz)
nuclear@0 268 {
nuclear@0 269 }
nuclear@1 270
nuclear@1 271 static bool parse_args(int argc, char **argv)
nuclear@1 272 {
nuclear@1 273 for(int i=1; i<argc; i++) {
nuclear@1 274 if(argv[i][0] == '-') {
nuclear@1 275 if(strcmp(argv[i], "-vr") == 0) {
nuclear@1 276 use_vr = true;
nuclear@1 277 } else if(strcmp(argv[i], "-novr") == 0) {
nuclear@1 278 use_vr = false;
nuclear@1 279 } else {
nuclear@1 280 fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@1 281 return false;
nuclear@1 282 }
nuclear@1 283 } else {
nuclear@1 284 fprintf(stderr, "unexpected argument: %s\n", argv[i]);
nuclear@1 285 return false;
nuclear@1 286 }
nuclear@1 287 }
nuclear@1 288 return true;
nuclear@1 289 }