diff options
Diffstat (limited to 'progs/redbook/alpha3D.c')
| -rw-r--r-- | progs/redbook/alpha3D.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/progs/redbook/alpha3D.c b/progs/redbook/alpha3D.c index 413836edd5b..6169bd162be 100644 --- a/progs/redbook/alpha3D.c +++ b/progs/redbook/alpha3D.c @@ -49,7 +49,7 @@ #define MAXZ 8.0 #define MINZ -8.0 -#define ZINC 0.4 +#define ZINC 4. static float solidZ = MAXZ; static float transparentZ = MINZ; @@ -130,11 +130,21 @@ void reshape(int w, int h) void animate(void) { + static double t0 = -1.; if (solidZ <= MINZ || transparentZ >= MAXZ) + { glutIdleFunc(NULL); + t0 = -1.; + } else { - solidZ -= ZINC; - transparentZ += ZINC; + double t, dt; + t = glutGet(GLUT_ELAPSED_TIME) / 1000.; + if (t0 < 0.) + t0 = t; + dt = t - t0; + t0 = t; + solidZ -= ZINC*dt; + transparentZ += ZINC*dt; glutPostRedisplay(); } } @@ -163,7 +173,7 @@ void keyboard(unsigned char key, int x, int y) int main(int argc, char** argv) { glutInit(&argc, argv); - glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); + glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(500, 500); glutCreateWindow(argv[0]); init(); |