port from perforce

hgplus/ShaderMinifier/tests/real/fly.frag

@@ -0,0 +1,20 @@
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D tex0;
+uniform sampler2D tex1;
+uniform sampler2D tex2;
+void main(void)
+{
+    vec2 p = -1.0 + 2.0 * gl_FragCoord.xy / resolution.xy;
+    vec2 uv;
+
+    float an = time*.25;
+
+    float x = p.x*cos(an)-p.y*sin(an);
+    float y = p.x*sin(an)+p.y*cos(an);
+     
+    uv.x = .25*x/abs(y);
+    uv.y = .20*time + .25/abs(y);
+
+    gl_FragColor = vec4(texture2D(tex0,uv).xyz * y*y, 1.0);
+}