Improved shaders (downstream from synth3d)

git-svn-id: svn://cook.msm.cam.ac.uk:745/diff-tomo/dtr@240 bf6ca9ba-c028-0410-8290-897cf20841d1

1 files changed, 6 insertions, 3 deletions

diff --git a/data/light-pp.frag b/data/light-pp.frag
index c862641..ca96990 100644
--- a/data/light-pp.frag
+++ b/data/light-pp.frag
@@ -12,6 +12,7 @@
 varying vec4 col_ambi;
 varying vec4 col_diff;
 varying vec4 col_spec;
+varying vec4 col_emit;
 varying float shininess;
 
 varying vec3 normal;
@@ -31,10 +32,12 @@ void main() {
 	diff = col_diff * clamp(dot( vec3(normalize(gl_LightSource[0].position)), normal ), 0.0, 1.0);
 	
 	/* Specular contribution */
-	spec = col_spec * pow(dot( vec3(normal), halfvc ), shininess);
+	spec = col_spec * clamp(pow(dot( vec3(normal), halfvc ), shininess), 0.0, 1.0);
 	
-	gl_FragColor = ambi + diff + spec;
-	gl_FragColor.a = 1.0;
+	gl_FragColor = vec4(min(col_emit.r + ambi.r + diff.r + spec.r, 1.0),
+			    min(col_emit.g + ambi.g + diff.g + spec.g, 1.0),
+			    min(col_emit.b + ambi.b + diff.b + spec.b, 1.0),
+			    min(col_emit.a + ambi.a + diff.a + spec.a, 1.0));
 	
 }