From c1065ee977f70042e54a930a6cd3af819d4a9806 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sat, 8 Jan 2005 23:52:01 +0000
Subject: compute reasonable animate rate (Marcelo Magallon)

---
 progs/samples/sphere.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

(limited to 'progs/samples/sphere.c')

diff --git a/progs/samples/sphere.c b/progs/samples/sphere.c
index cbe2cb1868..7d0508dee9 100644
--- a/progs/samples/sphere.c
+++ b/progs/samples/sphere.c
@@ -29,7 +29,7 @@
 #include <math.h>
 #include <stdlib.h>
 #include <GL/glut.h>
-#include "../util/readtex.c"
+#include "readtex.h"
 
 
 #ifndef PI
@@ -820,8 +820,16 @@ void Reshape(int width, int height)
 
 void Idle(void)
 {
-   xRotation += .75;
-   yRotation += .375;
+   static double t0 = -1.;
+   double t, dt;
+   t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
+   if (t0 < 0.)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   xRotation += .75*60.*dt;
+   yRotation += .375*60.*dt;
    glutPostRedisplay();
 }
 
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