support branch and loop in pixel shader

  most of the sample working with some small modification

1 files changed, 1 insertions, 1 deletions

diff --git a/progs/glsl/CH11-bumpmap.frag.txt b/progs/glsl/CH11-bumpmap.frag.txt
index 063576f5a3c..1467f767ec4 100644
--- a/progs/glsl/CH11-bumpmap.frag.txt
+++ b/progs/glsl/CH11-bumpmap.frag.txt
@@ -33,7 +33,7 @@ void main()
     litColor = SurfaceColor * max(dot(normDelta, LightDir), 0.0);
     vec3 reflectDir = reflect(LightDir, normDelta);
     
-    float spec = max(dot(EyeDir, reflectDir), 0.0);
+    float spec = max(dot(normalize(EyeDir), reflectDir), 0.0);
     spec *= SpecularFactor;
     litColor = min(litColor + spec, vec3(1.0));