support branch and loop in pixel shader

  most of the sample working with some small modification

1 files changed, 4 insertions, 3 deletions

diff --git a/progs/glsl/CH11-toyball.frag.txt b/progs/glsl/CH11-toyball.frag.txt
index 90ec1c27fc1..f3cac62fb3e 100644
--- a/progs/glsl/CH11-toyball.frag.txt
+++ b/progs/glsl/CH11-toyball.frag.txt
@@ -49,14 +49,15 @@ void main()
     inorout += dot(distance, vec4(1.0));
 
     distance.x = dot(p, HalfSpace4);
-    distance.y = StripeWidth - abs(p.z);
+//    distance.y = StripeWidth - abs(p.z);
+    distance.y = StripeWidth - abs(p.y);
     distance = smoothstep(-FWidth, FWidth, distance);
     inorout += distance.x;
 
     inorout = clamp(inorout, 0.0, 1.0);
 
-    surfColor = mix(Yellow, Red, inorout);
-    surfColor = mix(surfColor, Blue, distance.y);
+    surfColor = mix(Yellow, Blue, distance.y);
+    surfColor = mix(surfColor, Red, inorout);
 
     // normal = point on surface for sphere at (0,0,0)
     normal = p;