Changeset 2884 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao.cg

Timestamp:

08/29/08 15:46:36 (16 years ago)

Author:

mattausch

Message:

found bug with lod levels
made env file for shaders

File:

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

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

@@ +1 @@
+#include "../shaderenv.h"
+
 ////////////////////
 // Screen Spaced Ambient Occlusion shader
 // based on shader of Alexander Kusternig
 
-#define NUM_SAMPLES 10
-//#define NUM_SAMPLES 16
-
-// rule of thumb: approx 1 / NUM_SAMPLES
-//#define SAMPLE_INTENSITY 0.15f
-#define SAMPLE_INTENSITY 0.22f
-
-#define AREA_SIZE 7e-1f
-//#define AREA_SIZE 3e-1f
-#define VIEW_CORRECTION_SCALE 0.3f
-//#define VIEW_CORRECTION_SCALE 0.5f
-#define DISTANCE_SCALE 1e-6f
 
 
@@ -66 +56 @@
         for (int i = 0; i < NUM_SAMPLES; ++ i) 
         {
-                float2 offset = samples[i];
+                const float2 offset = samples[i];
 
                 ////////////////////
                 // add random noise: r stores costheta, g stores sintheta
 
-                //float2 mynoise = tex2D(noiseTexture, IN.texCoord.xy * noiseMultiplier).xy * 2.0f - 1.0f;
+                //const float2 mynoise = tex2D(noiseTexture, IN.texCoord.xy * noiseMultiplier).xy * 2.0f - 1.0f;
                 float2 mynoise = tex2D(noiseTexture, IN.texCoord.xy * noiseMultiplier).xy;
 
-                float2 offsetTransformed = reflect(offset, mynoise);
+                const float2 offsetTransformed = reflect(offset, mynoise);
 
                 // weight with projected coordinate to reach similar kernel size for near and far
@@ -165 +155 @@
                 (abs(depthDif) < 1e-3f))
         {
-                OUT.illum_col.x = ao * expFactor + oldCol.x * (1.0f - expFactor);
+                OUT.illum_col = (float4)ao * expFactor + oldCol.x * (1.0f - expFactor);
         }
         else
         {
-                OUT.illum_col.x = ao;
+                OUT.illum_col = (float4)ao;
         }
 
@@ -178 +168 @@
 
 
-
 pixel combine(fragment IN, 
                           uniform sampler2D colors,
@@ -185 +174 @@
         pixel OUT;
 
-        float4 col = tex2D(colors, IN.texCoord.xy);
+        float4 col = tex2Dlod(colors, float4(IN.texCoord.xy, 0, 0));
         float4 ao = tex2D(ssaoTex, IN.texCoord.xy);
 
         OUT.illum_col = col * ao.x;
+        OUT.illum_col.w = ao.w;
 
         return OUT;