SSSSS comments

[subsurface_scattering] / shaders / fbo_frag.glsl

diff --git a/shaders/fbo_frag.glsl b/shaders/fbo_frag.glsl
index cf1fafa6e6aa01b5ee0d36241b7c06e87cfbe3b6..f92483e3b55227d27f277a63edf9770e69e8d605 100644 (file)
--- a/shaders/fbo_frag.glsl
+++ b/shaders/fbo_frag.glsl
@@ -3,11 +3,34 @@ out vec4 FragColor;
   \r
 in vec2 TexCoords;\r
 \r
-uniform sampler2D screenTexture;\r
+uniform sampler2D shadowmapTexture;\r
+uniform sampler2D irradianceTexture;\r
+uniform int screenWidth;\r
+uniform int screenHeight;\r
+uniform int renderState;\r
+uniform vec2 samplePositions[13];\r
+uniform vec3 sampleWeights[13];\r
 \r
 void main()\r
-{ \r
-    FragColor = vec4(\r
-        texture(screenTexture, TexCoords).rgb,\r
-        1.0);\r
+{\r
+    if (renderState == 0) {\r
+        FragColor = texture(shadowmapTexture, TexCoords);\r
+    }\r
+    else if (renderState == 1) {\r
+        FragColor = texture(irradianceTexture, TexCoords);\r
+    }\r
+    else if (renderState == 2) {\r
+        // sample calculated irradiance\r
+        // using Gaussian kernel to approximate light spread\r
+        vec4 result = vec4(0, 0, 0, 1);\r
+        for (int i = 0; i < 13; i++) {\r
+            vec2 sampleCoords = TexCoords + samplePositions[i] * vec2(1.0/screenWidth, 1.0/screenHeight);\r
+            //vec4 sample = texture(irradianceTexture, sampleCoords)\r
+            //            * texture(shadowmapTexture, sampleCoords);\r
+            vec4 sample = texture(irradianceTexture, sampleCoords);\r
+            vec4 weight = vec4(sampleWeights[i], 1);\r
+            result += sample * weight;\r
+        }\r
+        FragColor = result;\r
+    }\r
 }\r