Changeset 2985 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders

Timestamp:

10/01/08 11:35:23 (16 years ago)

Author:

mattausch

Message:

trying out linear depth instead of positions

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders

Files:

• deferred.cg (modified) (2 diffs)
• ssao.cg (modified) (5 diffs)

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

@@ -82 +82 @@
         
         OUT.color = col;
-        
+
+OUT.color.w = color.w;
+
 
         ////////////
         //-- write out logaritmic luminance for tone mapping
-
+/*
         float4 oldColor = tex2Dlod(colors, float4(IN.texCoord.xy, 0, MAX_LOD_LEVEL));
 
@@ -101 +103 @@
         else
                 OUT.color.w = logLumScaled;
-
+*/
         return OUT;
 }

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

@@ -36 +36 @@
 */
 float2 ssao(fragment IN,
-                   uniform sampler2D positions,
+                   uniform sampler2D colors,
                    uniform sampler2D noiseTexture,
                    uniform float2 samples[NUM_SAMPLES],
                    uniform float3 currentNormal,
                    uniform float4 centerPosition,
-                   uniform float scaleFactor
-                   //,uniform float3 currentViewDir
+                   uniform float scaleFactor,
+                   uniform float3 viewDir,
+                   uniform float3 eyePos
                    )
 {
@@ -59 +60 @@
                 ////////////////////
                 // add random noise: reflect around random normal vector (warning: slow!)
+
                 float2 mynoise = tex2D(noiseTexture, IN.texCoord.xy).xy;
                 const float2 offsetTransformed = myreflect(offset, mynoise);
@@ -71 +73 @@
 
                 // sample downsampled texture in order to speed up texture accesses
-                float3 sample_position = tex2Dlod(positions, float4(texcoord, 0, SSAO_MIPMAP_LEVEL)).xyz;
-                //float3 sample_position = tex2D(positions, texcoord).xyz;
+                float eyeSpaceDepth = tex2Dlod(colors, float4(texcoord, 0, SSAO_MIPMAP_LEVEL)).w;
+
+                float3 sample_position = eyePos - viewDir * eyeSpaceDepth; 
+                
 
                 float3 vector_to_sample = sample_position - centerPosition.xyz;
@@ -112 +116 @@
                    const uniform float4x4 oldModelViewProj,
                    uniform float maxDepth,
-                   uniform float temporalCoherence
+                   uniform float temporalCoherence,
+                   uniform float3 eyePos
                    )
 {
@@ -129 +134 @@
         const float currentDepth = centerPosition.w;
 
-        const float2 ao = ssao(IN, positions, noiseTexture, samples, normal, centerPosition, w);//, viewDir);
+        /// the current view direction
+        float3 viewDir = normalize(IN.view);
+
+        const float2 ao = ssao(IN, colors, noiseTexture, samples, normal, centerPosition, w, viewDir, eyePos);