From d4ca478ad313c6c20834e410ba14ad3a5e7b20bf Mon Sep 17 00:00:00 2001
From: hwc487
Date: Tue, 12 Jun 2012 10:28:26 -0700
Subject: Material cleanup & bug fixes.
---
assets/shaders/Star.frag.glsl | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
(limited to 'assets/shaders/Star.frag.glsl')
diff --git a/assets/shaders/Star.frag.glsl b/assets/shaders/Star.frag.glsl
index f63fe605..f61f43c9 100644
--- a/assets/shaders/Star.frag.glsl
+++ b/assets/shaders/Star.frag.glsl
@@ -3,6 +3,7 @@ precision highp float;
#endif
uniform float u_time;
+uniform float u_speed;
uniform vec2 u_resolution;
uniform sampler2D u_tex0;
@@ -10,17 +11,19 @@ void main(void)
{
vec2 uv;
+ float time = u_time * u_speed;
+
vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / u_resolution.xy;
float a = atan(p.y,p.x);
float r = sqrt(dot(p,p));
- float s = r * (1.0+0.8*cos(u_time*1.0));
+ float s = r * (1.0+0.8*cos(time*1.0));
- uv.x = .02*p.y+.03*cos(-u_time+a*3.0)/s;
- uv.y = .1*u_time +.02*p.x+.03*sin(-u_time+a*3.0)/s;
+ uv.x = .02*p.y+.03*cos(-time+a*3.0)/s;
+ uv.y = .1*time +.02*p.x+.03*sin(-time+a*3.0)/s;
float w = .9 + pow(max(1.5-r,0.0),4.0);
- w*=0.6+0.4*cos(u_time+3.0*a);
+ w*=0.6+0.4*cos(time+3.0*a);
vec3 col = texture2D(u_tex0,uv).xyz;
--
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