X-Git-Url: https://gitweb.ps.run/subsurface_scattering/blobdiff_plain/451e872ddbe6db8bd8d6aa54ca0bf744dc5405e5..cedffd5cf24c1a3ed64161475c806c55135406be:/shaders/fbo_frag.glsl

diff --git a/shaders/fbo_frag.glsl b/shaders/fbo_frag.glsl
index f6f12cd..7463fc8 100644
--- a/shaders/fbo_frag.glsl
+++ b/shaders/fbo_frag.glsl
@@ -3,31 +3,35 @@ out vec4 FragColor;
   
 in vec2 TexCoords;
 
-uniform sampler2D screenTexture;
-uniform int applySSSSS;
-uniform int N;
+uniform sampler2D shadowmapTexture;
+uniform sampler2D irradianceTexture;
+uniform int screenWidth;
+uniform int screenHeight;
+uniform int renderState;
+uniform vec2 samplePositions[13];
+uniform vec3 sampleWeights[13];
 
 void main()
 {
-    if (applySSSSS == 1) {
-        float x = 1.0/1600.0;
-        float y = 1.0/900.0;
-
-        float maxDist = N*N + N*N;
-
-        vec4 color = vec4(0, 0, 0, 1);
-        for (int i = -N; i <= N; i++) {
-            for (int j = -N; j <= N; j++) {
-                float dist = i*i + j*j;
-                vec4 newC = texture(screenTexture, TexCoords + vec2(i*x, j*y)) / (2*N*N);
-                float factor = 1 - (dist / maxDist);
-                factor = pow(factor, 2);
-                color += newC * factor;
-            }
-        }
-        FragColor = color;
+    if (renderState == 0) {
+        FragColor = texture(shadowmapTexture, TexCoords);
     }
-    else {
-        FragColor = texture(screenTexture, TexCoords);
+    // stencil buffer
+    else if (renderState == 1) {
+        FragColor = texture(irradianceTexture, TexCoords);
+    }
+    else if (renderState == 2) {
+        FragColor = texture(shadowmapTexture, TexCoords) * 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 weight = vec4(sampleWeights[i], 1);
+            result += sample * weight;
+        }
+        FragColor = result;
     }
 }