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better animate rate (Marcelo Magallon)

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This commit is contained in:
Brian Paul
2005-01-09 17:37:50 +00:00
parent 516f9bc6e3
commit 92eddb0fd4
17 changed files with 177 additions and 77 deletions
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18
progs/demos/terrain.c
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@@ -69,7 +69,7 @@ static int scrheight = HEIGHT;
static float obs[3] = { OBSSTARTX, heightMnt * 1.3, OBSSTARTY };
static float dir[3], v1[2], v2[2];
static float v = 15.0;
static float v = 900.0;
static float alpha = 75.0;
static float beta = 90.0;
@@ -77,6 +77,12 @@ static void
calcposobs(void)
{
float alpha1, alpha2;
static double t0 = -1.;
double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
if (t0 < 0.0)
t0 = t;
dt = t - t0;
t0 = t;
dir[0] = sin(alpha * M_PI / 180.0);
dir[2] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
@@ -97,9 +103,9 @@ calcposobs(void)
v2[0] = sin(alpha2 * M_PI / 180.0);
v2[1] = cos(alpha2 * M_PI / 180.0);
obs[0] += v * dir[0];
obs[1] += v * dir[1];
obs[2] += v * dir[2];
obs[0] += v * dir[0] * dt;
obs[1] += v * dir[1] * dt;
obs[2] += v * dir[2] * dt;
if (obs[1] < 0.0)
obs[1] = 0.0;
@@ -432,10 +438,10 @@ key(unsigned char k, int x, int y)
exit(0);
break;
case 'a':
v += 0.5;
v += 50.;
break;
case 'z':
v -= 0.5;
v -= 50.;
break;
case 'p':
if (poutline) {