1 files changed, 6 insertions, 44 deletions

@@ -4,51 +4,13 @@ in vec2 UV;
 
 out vec3 color;
 
-uniform sampler2D screenTex;
-uniform float iGlobalTime;
-uniform vec2 resolution;
-
-float nrand(vec2 n)
-{
-  return fract(sin(dot(n.xy, vec2(19.9898, 78.233))) * 43758.5453);
-}
-
-vec2 rot2d(vec2 p, float a)
-{
-  vec2 sc = vec2(sin(a), cos(a));
-  return vec2(dot(p, vec2(sc.y, -sc.x)), dot(p, sc.xy));
-}
+uniform vec2 offset;
+uniform sampler2D inTex;
 
 void main()
 {
-  const int NUM_TAPS = 12;
-  float max_siz = 15.0;
-  
-  vec2 fTaps_Poisson[NUM_TAPS];
-  fTaps_Poisson[0]  = vec2(-.326, -.406);
-  fTaps_Poisson[1]  = vec2(-.840, -.074);
-  fTaps_Poisson[2]  = vec2(-.696,  .457);
-  fTaps_Poisson[3]  = vec2(-.203,  .621);
-  fTaps_Poisson[4]  = vec2( .962, -.195);
-  fTaps_Poisson[5]  = vec2( .473, -.480);
-  fTaps_Poisson[6]  = vec2( .519,  .767);
-  fTaps_Poisson[7]  = vec2( .185, -.893);
-  fTaps_Poisson[8]  = vec2( .507,  .064);
-  fTaps_Poisson[9]  = vec2( .896,  .412);
-  fTaps_Poisson[10] = vec2(-.322, -.933);
-  fTaps_Poisson[11] = vec2(-.792, -.598);
-  
-  vec4 sum = vec4(0);
-  float rnd = 6.28 * nrand(UV + fract(iGlobalTime));
-  vec4 basis = vec4(rot2d(vec2(1,0), rnd), rot2d(vec2(0,1), rnd));
-  for (int i=0; i<NUM_TAPS; i++)
-  {
-    vec2 ofs = fTaps_Poisson[i];
-    ofs = vec2(dot(ofs, basis.xz), dot(ofs, basis.yw));
-    
-    vec2 texcoord = UV + max_siz * ofs / resolution;
-    sum += texture(screenTex, texcoord, -10.0);
-  }
-  
-  color = (sum / vec4(NUM_TAPS)).rgb;
+  color = vec3(0.0);
+  color += (5.0/16.0) * texture(inTex, UV - offset).rgb;
+  color += (6.0/16.0) * texture(inTex, UV).rgb;
+  color += (5.0/16.0) * texture(inTex, UV + offset).rgb;
 }