diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2005-01-09 17:37:50 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2005-01-09 17:37:50 +0000 |
| commit | 92eddb0fd404624ca198f19e4088927701eec7f5 (patch) | |
| tree | dd93d51d271e6bd43d09af9e8b0f3a98a640a8d2 /progs/demos/pointblast.c | |
| parent | 516f9bc6e306fe7820649ead125d557b46ca8419 (diff) | |
better animate rate (Marcelo Magallon)
Diffstat (limited to 'progs/demos/pointblast.c')
| -rw-r--r-- | progs/demos/pointblast.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/progs/demos/pointblast.c b/progs/demos/pointblast.c index 14e9cf359f..715813f176 100644 --- a/progs/demos/pointblast.c +++ b/progs/demos/pointblast.c @@ -79,7 +79,6 @@ static float float_rand(void) { return rand() / (float) RAND_MAX; } #define MEAN_VELOCITY 3.0 #define GRAVITY 2.0 -#define TIME_DELTA 0.025 /* The speed of time. */ /* Modeling units of ground extent in each X and Z direction. */ #define EDGE 12 @@ -114,6 +113,13 @@ updatePointList(void) float distance; int i; + static double t0 = -1.; + double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0; + if (t0 < 0.0) + t0 = t; + dt = t - t0; + t0 = t; + motion = 0; for (i=0; i<numPoints; i++) { distance = pointVelocity[i][0] * theTime; @@ -139,9 +145,9 @@ updatePointList(void) pointTime[i] = 0.0; /* Reset the particles sense of up time. */ } motion = 1; - pointTime[i] += TIME_DELTA; + pointTime[i] += dt; } - theTime += TIME_DELTA; + theTime += dt; if (!motion && !spin) { if (repeat) { makePointList(); @@ -264,7 +270,7 @@ menu(int option) case 0: makePointList(); break; -#if GL_ARB_point_parameters +#ifdef GL_ARB_point_parameters case 1: glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, constant); break; @@ -281,7 +287,7 @@ menu(int option) case 5: blend = 0; break; -#if GL_ARB_point_parameters +#ifdef GL_ARB_point_parameters case 6: glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 1.0); break; |