demos: remove OSMESA stuff from Makefile

[mesa.git] / progs / demos / bounce.c

diff --git a/progs/demos/bounce.c b/progs/demos/bounce.c
index d97791be5d4e23094f90a0c8e7b4536d5c449b56..436bc7d1fb880813b711aba663f5ee5f0ce19262 100644 (file)
--- a/progs/demos/bounce.c
+++ b/progs/demos/bounce.c
@@ -1,4 +1,3 @@
-/* $Id: bounce.c,v 1.3 2000/08/16 20:36:34 brianp Exp $ */
 
 /*
  * Bouncing ball demo.
@@ -26,12 +25,12 @@
 GLboolean IndexMode = GL_FALSE;
 GLuint Ball;
 GLenum Mode;
-GLfloat Zrot = 0.0, Zstep = 6.0;
+GLfloat Zrot = 0.0, Zstep = 180.0;
 GLfloat Xpos = 0.0, Ypos = 1.0;
-GLfloat Xvel = 0.2, Yvel = 0.0;
+GLfloat Xvel = 2.0, Yvel = 0.0;
 GLfloat Xmin = -4.0, Xmax = 4.0;
 GLfloat Ymin = -3.8, Ymax = 4.0;
-GLfloat G = -0.1;
+GLfloat G = -9.8;
 
 static GLuint 
 make_ball(void)
@@ -150,10 +149,17 @@ static void
 idle(void)
 {
   static float vel0 = -100.0;
+  static double t0 = -1.;
+  double t, dt;
+  t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
+  if (t0 < 0.)
+     t0 = t;
+  dt = t - t0;
+  t0 = t;
 
-  Zrot += Zstep;
+  Zrot += Zstep*dt;
 
-  Xpos += Xvel;
+  Xpos += Xvel*dt;
   if (Xpos >= Xmax) {
     Xpos = Xmax;
     Xvel = -Xvel;
@@ -164,8 +170,8 @@ idle(void)
     Xvel = -Xvel;
     Zstep = -Zstep;
   }
-  Ypos += Yvel;
-  Yvel += G;
+  Ypos += Yvel*dt;
+  Yvel += G*dt;
   if (Ypos < Ymin) {
     Ypos = Ymin;
     if (vel0 == -100.0)