Changeset 2822 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders

Timestamp:

07/08/08 03:35:16 (16 years ago)

Author:

mattausch

Message:

worked on deferred shading

Location:

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

Files:

• deferred.cg (modified) (9 diffs)
• mrt.cg (modified) (4 diffs)

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

@@ -1 @@
-#define NUM_SAMPLES 8
-#define SAMPLE_INTENSITY 0.5f
-//#define SAMPLE_INTENSITY 0.2f
-#define AREA_SIZE 3e-1f
+#define NUM_SAMPLES 12
+//#define SAMPLE_INTENSITY 0.4f
+#define SAMPLE_INTENSITY 0.7f
+#define AREA_SIZE 5e-1f
 
 // kustls magic sample positions
@@ -72 +72 @@
 float ssao(fragment IN,
            uniform sampler2D positions,
-           uniform sampler2D normals,
            uniform sampler2D noiseTexture,
-           uniform float2 samples[NUM_SAMPLES]
+           uniform float2 samples[NUM_SAMPLES],
+           uniform float3 currentNormal
            )
 {
@@ -82 +82 @@
   float w = centerPosition.w;
 
-  // the normal on the current position
-  float3 centerNormal = tex2D(normals, IN.texCoord.xy).xyz;
-  //normalize(centerNormal);
-  
   // Check in a circular area around the current position.
   // Shoot vectors to the positions there, and check the angle to these positions.
@@ -120 +116 @@
     
     // Angle between current normal and direction to sample controls AO intensity.
-    float cos_angle = dot(direction_to_sample, centerNormal);
+    float cos_angle = dot(direction_to_sample, currentNormal);
     cos_angle = max(cos_angle, 0.0f);
     
     // distance between current position and sample position controls AO intensity.
+    //const float maxdist = 2e-1f;
     const float maxdist = 5e-1f;
-    //const float scale = 50.0f;
-
+    
     float distance_intensity = maxdist - length_to_sample;
+    //float distance_intensity = 0.5f / (1.0f + length_to_sample * length_to_sample);
     distance_intensity = max(distance_intensity, 0.0f);
     // quadratic influence
@@ -142 +139 @@
              uniform sampler2D colors,
              uniform sampler2D positions,
-             uniform sampler2D normals)
+             uniform float3 normal,
+             uniform float amb)
 {
   float4 lightDir = float4(0.8f, -1.0f, 0.7f, 0.0f);
@@ -148 +146 @@
   
   float4 color = tex2D(colors, IN.texCoord.xy);
-  float3 normal = tex2D(normals, IN.texCoord.xy).xyz;
-
-  // expand normal
-  normal = normalize(normal * 2.0f - 1.0f);
-
+ 
   float4 position = tex2D(positions, IN.texCoord.xy);
 
-  float4 ambient = float4(0.3f);
+  float4 ambient = 0.3f;
 
   // float3 L = normalize(lightPosition - position);
@@ -166 +160 @@
   float diffuse = diffuseLight + diffuseLight2;
 
-  return (ambient + diffuse) * color;
+  return (ambient + diffuse) * color * (1.0f - amb) + amb * color;
 }
 
@@ -179 +173 @@
   pixel OUT;
 
-  float4 col = shade(IN, colors, positions, normals);
-  float ao = ssao(IN, positions, normals, noiseTexture, samples);
+  float4 normal = tex2D(normals, IN.texCoord.xy);
+  float amb = normal.w;
+
+  // expand normal
+  normal = normalize(normal * 2.0f - 1.0f);
+
+  float4 col = shade(IN, colors, positions, normal, amb);
+  float ao = ssao(IN, positions, noiseTexture, samples, normal);
   
   //OUT.color = tex2D(positions, IN.texCoord.xy);
   //OUT.color = ao;
-  //OUT.color =  col;
+  //OUT.color = col;
   OUT.color = ao * col;
 
@@ -197 +197 @@
 {
   pixel OUT;
-
-  float4 col = shade(IN, colors, positions, normals);
+  
+  float4 normal = tex2D(normals, IN.texCoord.xy);
+  float amb = normal.w;
+
+  // expand normal
+  normal = normalize(normal * 2.0f - 1.0f);
+  
+  float4 col = shade(IN, colors, positions, normal.xyz, amb);
   OUT.color = col;
 

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

@@ -37 +37 @@
   float4 col: COLOR0;
   float4 pos: COLOR1;
-  float3 norm: COLOR2;
+  float4 norm: COLOR2;
 };
 
@@ -62 +62 @@
 
 
-pixel fragtex(fragin IN, uniform sampler2D tex, uniform float maxDepth, uniform float4 diffuse)
+pixel fragtex(fragin IN, 
+              uniform sampler2D tex, 
+              uniform float maxDepth, 
+              uniform float4 ambient, 
+              uniform float4 diffuse)
 {
   pixel pix;
       
-  pix.col = diffuse * tex2D(tex, IN.texCoord.xy);
+  pix.col = (ambient + diffuse) * tex2D(tex, IN.texCoord.xy);
   pix.pos = IN.worldPos * maxDepth;
-  pix.norm = IN.normal;
+  pix.norm.xyz = IN.normal * 0.5f + 0.5f;
+  // hack: squeeze some information about ambient into the texture
+  pix.norm.w = ambient.x;
+  // hack: store projection coordinate for scaling ssao
   pix.pos.w = IN.projPos.w;
 
@@ -75 +82 @@
 
 
-pixel frag(fragin IN, uniform float maxDepth, uniform float4 diffuse)
+pixel frag(fragin IN, 
+           uniform float maxDepth, 
+           uniform float4 ambient, 
+           uniform float4 diffuse)
 {
   pixel pix;
@@ -81 +91 @@
   pix.col = diffuse;
   pix.pos = IN.worldPos * maxDepth;
-  pix.norm = IN.normal;
+  pix.norm.xyz = IN.normal * 0.5f + 0.5f;
+  // hack: squeeze some information about ambient into the texture
+  pix.norm.w = ambient.x;
   pix.pos.w = IN.projPos.w;