Swirlytron!

git-svn-id: svn://cook.msm.cam.ac.uk:745/thrust3d/thrust3d@49 84d2e878-0bd5-11dd-ad15-13eda11d74c5

1 files changed, 13 insertions, 1 deletions

diff --git a/data/shaders/swirlytron.frag b/data/shaders/swirlytron.frag
index d152636..f582aa7 100644
--- a/data/shaders/swirlytron.frag
+++ b/data/shaders/swirlytron.frag
@@ -11,9 +11,21 @@
 
 varying vec2 coords;
 
+uniform float time;
+
 void main() {
 	
-	gl_FragColor = vec4(coords.x, 0.0, coords.y, 1.0);
+	vec3 colour;
+	float f;
+	
+	f = 1.0 + (0.5*cos(time/1000.0));
+	
+	colour.b  = 0.2 * abs( cos(2*f*3.141*coords.x + (time/100.0)) );
+	colour.b += 0.5 * abs( cos(2*f*3.141*coords.y + (time/100.0)) );
+	colour.r = 0.1;
+	colour.g = 0.0;
+	
+	gl_FragColor = vec4(colour.r, colour.g, colour.b, 1.0);
 	
 }