From dc92188fef67d7a2032173d7746fbc16a951a366 Mon Sep 17 00:00:00 2001
From: hwc487
Date: Thu, 17 May 2012 15:15:43 -0700
Subject: Exposing parameters for pulse and plasma materials

---
 assets/shaders/Pulse.frag.glsl | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'assets/shaders/Pulse.frag.glsl')

diff --git a/assets/shaders/Pulse.frag.glsl b/assets/shaders/Pulse.frag.glsl
index b24c9bef..9aeb05c9 100644
--- a/assets/shaders/Pulse.frag.glsl
+++ b/assets/shaders/Pulse.frag.glsl
@@ -6,16 +6,22 @@ uniform float u_time;
 uniform vec2 u_resolution;
 uniform sampler2D u_tex0;
 
+uniform float u_speed;
+uniform float u_xscale;
+uniform float u_yscale;
+
 void main(void)
 {
     vec2 halfres = u_resolution.xy/2.0;
     vec2 cPos = gl_FragCoord.xy;
 
-    cPos.x -= 0.5*halfres.x*sin(u_time/2.0)+0.3*halfres.x*cos(u_time)+halfres.x;
-    cPos.y -= 0.4*halfres.y*sin(u_time/5.0)+0.3*halfres.y*cos(u_time)+halfres.y;
+	float time = u_time * u_speed;
+
+    cPos.x -= u_xscale*halfres.x*sin(time/2.0)+0.3*halfres.x*cos(time)+halfres.x;
+    cPos.y -= u_yscale*halfres.y*sin(time/5.0)+0.3*halfres.y*cos(time)+halfres.y;
     float cLength = length(cPos);
 
-    vec2 uv = gl_FragCoord.xy/u_resolution.xy+(cPos/cLength)*sin(cLength/30.0-u_time*10.0)/25.0;
+    vec2 uv = gl_FragCoord.xy/u_resolution.xy+(cPos/cLength)*sin(cLength/30.0-time*10.0)/25.0;
     vec3 col = texture2D(u_tex0,uv).xyz*50.0/cLength;
 
     gl_FragColor = vec4(col,1.0);
-- 
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