X-Git-Url: https://gitweb.ps.run/subsurface_scattering/blobdiff_plain/7a181bdf261b620adb266a4f6b485a0afd1ed306..36fb27a899045de24d71d55b06648abda7547268:/shaders/frag_irradiance.glsl

diff --git a/shaders/frag_irradiance.glsl b/shaders/frag_irradiance.glsl
index 9e14ebe..1bcbc99 100644
--- a/shaders/frag_irradiance.glsl
+++ b/shaders/frag_irradiance.glsl
@@ -1,16 +1,24 @@
 #version 330 core
 
 in vec3 FragPos;
+in vec3 LocalPos;
+in vec3 Backside;
+in float BacksideIrradiance;
 in vec3 Normal;
 
 out vec4 FragColor;
 
-uniform sampler2D shadowmapTexture;
-
 uniform vec3 objectColor;
 uniform vec3 lightColor;
 uniform vec3 lightPos;
 uniform vec3 viewPos;
+uniform float transmittanceScale;
+uniform int renderState;
+uniform float powBase;
+uniform float powFactor;
+
+uniform float translucencySampleVariances[6];
+uniform vec3 translucencySampleWeights[6];
 
 void main()
 {
@@ -29,6 +37,30 @@ void main()
   float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
   vec3 specular = specularStrength * spec * lightColor;
 
+  //float distanceToBackside = length(clamp(FragPos - Backside, vec3(0), vec3(1000)));
+  float distanceToBackside = length(FragPos - Backside);
+  //distanceToBackside = distance(Backside, LocalPos);
   vec3 result = (ambient + diffuse + specular) * objectColor;
+
+  if (renderState == 3) {
+    if (distanceToBackside != 0) {
+      result += objectColor * pow(powBase, powFactor / pow(distanceToBackside, 0.6)) * transmittanceScale * (1 - diff);
+      // vec3 translucency = vec3(0);
+      // for (int i = 0; i < 6; i++) {
+      //   translucency += objectColor * translucencySampleWeights[i] * exp(-pow(distanceToBackside, 2.0) / translucencySampleVariances[i]);
+      // }
+
+      // result += translucency * transmittanceScale;
+    }
+  }
+      //result += objectColor * pow(powBase, -pow(distanceToBackside, 2)) * transmittanceScale * (1 - diff);
+  // if (renderState == 3) {
+  //   //result = Backside;
+  //   //result = LocalPos;
+  //   result = vec3(distanceToBackside);
+  // }
+
+    
   FragColor = vec4(result, 1.0f);
+  //FragColor = vec4(vec3(distanceToBackside), 1);
 }