Work on cloud/window transparency

shader/cloud/basic.frag

@@ -11,6 +11,8 @@ void main()
     if (d > 1) {discard;}
     fCol = vec4(vCol.xyz,vCol.w*(1-d));
     fPos = vec4(vPosID.xyz, vCol.w*(1-d));
+    //fPos = vec4(vPosID.xy,vPosID.z*0.5, vCol.w*(1-d));
     fNorm = vec4(-vControls.xy, -0.1 + 0.2 * d ,fPos.w);
+    //fNorm = vec4(-vControls.xy, -0.1 + 2 * d ,vCol.w * (1.01-(d*d*d)));
     //fNorm = vec4(-vControls.xy, -0.1 + d , fPos.w);
 }

shader/fullscreen/transparencyComp.frag

@@ -0,0 +1,18 @@
+#version 450 core
+in vec2 vTexPos;
+out vec4 fColor;
+layout(binding = 0) uniform sampler2D t0;
+layout(binding = 1) uniform sampler2D t1;
+layout(binding = 2) uniform sampler2D t2;
+layout(binding = 3) uniform sampler2D t3;
+vec4 blend (vec4 src, vec4 dst) {
+    return src + (1-src.a) * dst;
+}
+void main() { 
+    //fColor = texture(t0, vTexPos) + texture(t2, vTexPos); 
+    vec4 x = texture(t0, vTexPos);
+    float xz = texture(t1, vTexPos).z;
+    vec4 y = texture(t2, vTexPos);
+    float yz = texture(t3, vTexPos).z;
+    fColor = ( xz > yz ? blend(x,y) : blend(y,x)) ;
+}

shader/fullscreen/transparencyComp.vert

@@ -0,0 +1,8 @@
+#version 450 core
+layout(location = 0) in vec2 pos;
+layout(location = 1) in vec2 texPos;
+out vec2 vTexPos;
+void main() {
+  gl_Position = vec4(pos, 0.0, 1.0);
+  vTexPos = texPos;
+}

shader/wall/window.frag

@@ -9,6 +9,7 @@ void main()
   fCol = gColor;
   //fPos = gPos;// + vec4(0,0,50,0);
   //fNorm = vec4 (0,0,10,10);
-  fPos = vec4(0,0,50,1);
+  //fPos = vec4(0,0,50,1);
+  fPos = gPos;
   fNorm = vec4 (0,0,10,10);
 }