X-Git-Url: https://gitweb.ps.run/subsurface_scattering/blobdiff_plain/a0fdc6d882a1755d0b0607ba3d9bb55e7f8ac006..refs/heads/main:/shaders/fbo_frag.glsl

diff --git a/shaders/fbo_frag.glsl b/shaders/fbo_frag.glsl
index 1102992..8ffc0ce 100644
--- a/shaders/fbo_frag.glsl
+++ b/shaders/fbo_frag.glsl
@@ -11,54 +11,18 @@ uniform int renderState;
 uniform vec2 samplePositions[13];
 uniform vec3 sampleWeights[13];
 
-vec4 blur(sampler2D tex, vec2 uv, vec2 res) {
-  float Pi = 6.28318530718; // Pi*2
-    
-  // GAUSSIAN BLUR SETTINGS {{{
-  float Directions = 16.0; // BLUR DIRECTIONS (Default 16.0 - More is better but slower)
-  float Quality = 4.0; // BLUR QUALITY (Default 4.0 - More is better but slower)
-  float Size = 8.0; // BLUR SIZE (Radius)
-  // GAUSSIAN BLUR SETTINGS }}}
-  
-  vec2 Radius = Size/res;
-  
-  // Pixel colour
-  vec4 Color = texture(tex, uv);
-  
-  // Blur calculations
-  for( float d=0.0; d<Pi; d+=Pi/Directions) {
-    for(float i=1.0/Quality; i<=1.0; i+=1.0/Quality) {
-      Color += texture( tex, uv+vec2(cos(d),sin(d))*Radius*i);		
-    }
-  }
-  
-  // Output to screen
-  Color /= Quality * Directions - 15.0;
-  return Color;
-}
-
 void main()
 {
-    if (renderState == 0) {
-        FragColor = blur(shadowmapTexture, TexCoords, vec2(screenWidth, screenHeight));
-    }
-    else if (renderState == 1) {
-        FragColor = texture(shadowmapTexture, TexCoords);
-    }
-    // stencil buffer
-    else if (renderState == 2) {
-        FragColor = texture(irradianceTexture, TexCoords);
-    }
-    else if (renderState == 3) {
-        vec4 result = vec4(0, 0, 0, 1);
-        for (int i = 0; i < 13; i++) {
-            vec2 sampleCoords = TexCoords + samplePositions[i] * vec2(1.0/screenWidth, 1.0/screenHeight);
-            //vec4 sample = texture(irradianceTexture, sampleCoords)
-            //            * texture(shadowmapTexture, sampleCoords);
-            vec4 sample = texture(irradianceTexture, sampleCoords);
-            vec4 weight = vec4(sampleWeights[i], 1);
-            result += sample * weight;
-        }
-        FragColor = result;
+    // sample calculated irradiance
+    // using Gaussian kernel to approximate light spread
+    vec4 result = vec4(0, 0, 0, 1);
+    for (int i = 0; i < 13; i++) {
+        vec2 sampleCoords = TexCoords + samplePositions[i] * vec2(1.0/screenWidth, 1.0/screenHeight);
+        //vec4 sample = texture(irradianceTexture, sampleCoords)
+        //            * texture(shadowmapTexture, sampleCoords);
+        vec4 sample = texture(irradianceTexture, sampleCoords);
+        vec4 weight = vec4(sampleWeights[i], 1);
+        result += sample * weight;
     }
+    FragColor = result;
 }