X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=scene.c;h=2f45633317dc6526b725347353fe82d3aedc8e50;hb=65f3d838461588453f40f54c884a48bc0a44e8fc;hp=7d45bbf2ded8b4489368d71c78c37b108331a206;hpb=65949d92003e506ddbcc3285abfc9d4b5070df13;p=atyndall%2Fcits2231.git

diff --git a/scene.c b/scene.c
index 7d45bbf..2f45633 100644
--- a/scene.c
+++ b/scene.c
@@ -298,8 +298,14 @@ void display() {
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
 
+  GLfloat zcoord = 5.0 + (zoomFactor*0.2);
+  if ( zcoord < 0.0 ) {
+    zcoord = 0.0;
+    zoomFactor = 0.0;
+  }
+
   gluLookAt(
-    0.0,  0.0,  5.0 + (zoomFactor*0.2),  /* eye is at (x,y,z) */
+    0.0,  0.0,  zcoord,  /* eye is at (x,y,z) */
     0.0,  0.0,  0.0,  /* center is at (x,y,z) */
     0.0,  1.0,  0.0   /* up is in postivie Y direction */
     );