Changeset 3018 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/mrt.cg

Timestamp:

10/09/08 11:48:06 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/mrt.cg (modified) (5 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/mrt.cg

@@ -17 +17 @@
   float4 worldPos: TEXCOORD1; // world position
   float3 normal: TEXCOORD2;
-  float4 projPos: TEXCOORD3;
 };
 
@@ -31 +30 @@
         float4 worldPos: TEXCOORD1; // world position
         float3 normal: TEXCOORD2;
-        float4 projPos: TEXCOORD3;
 };
 
@@ -59 +57 @@
 
         OUT.normal = IN.normal;
-        OUT.projPos = OUT.position;
 
         return OUT;
@@ -104 +101 @@
 
         // compute eye linear depth
-        const float4 projPos = IN.projPos / IN.projPos.w;
-        
-        float2 screenCoord = projPos.xy * 0.5f + 0.5f;
-        
-        const float3 viewVec = Interpol(screenCoord, bl, br, tl, tr);
-        const float invMagView = 1.0f / length(viewVec);
-        // note: has to done in this order, otherwise strange precision problems!
-        pix.col.w = invMagView * length(eyePos - IN.worldPos.xyz);
+        pix.col.w = length(eyePos - IN.worldPos.xyz);
 
         return pix;
@@ -133 +123 @@
         // hack: squeeze some information about the ambient term into the target
         //pix.col.w = glstate.material.emission.x;
-        
-        // compute eye linear depth and scale with lenght to avoid sqr root in pixel shader
-        const float4 projPos = IN.projPos / IN.projPos.w;
-        
-        float2 screenCoord = projPos.xy * 0.5f + 0.5f;
-        const float magView = length(Interpol(screenCoord, bl, br, tl, tr));
-        pix.col.w = length(eyePos - IN.worldPos.xyz) / magView;
+        pix.col.w = length(eyePos - IN.worldPos.xyz);
 
         return pix;