Changeset 2865 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/antialiasing.cg

Timestamp:

08/25/08 17:34:34 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/antialiasing.cg (modified) (1 diff)

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

@@ -1 +1 @@
 struct v2p
 {
-        float tc0: TEXCOORD0; // Center
-        float tc1: TEXCOORD1; // Center
-        float tc2: TEXCOORD2; // Center
-        float tc3: TEXCOORD3; // Center
-        float tc4: TEXCOORD4; // Center
-        float tc5: TEXCOORD5; // Center
-        float tc6: TEXCOORD6; // Center
-}
+        float2 c:  TEXCOORD0; // center
+        float2 lt: TEXCOORD1; // left top
+        float2 rb: TEXCOORD2; // right bottom
+        float2 rt: TEXCOORD3; // right top
+        float2 lb: TEXCOORD4; // left bottom
+        float4 lr: TEXCOORD5; // left / right
+        float4 tb: TEXCOORD6; // top / bottom
+};
+
+//uniform sampler2D s_distort;
+uniform float4 e_barrier = float4(5e-5, 5e-5, 0, 0);
+uniform float4 e_weights = float4(1.0f, 1.0f, 1.0f, 1.0f); // x = normal, y = depth
+uniform float4 e_kernel = float4(0.3f, 1.0f, 1.0f, 1.0f); // x = normal, y = depth
 
 
-uniform sampler2D s_distort;
-uniform hlf4 e_barrier;
-uniform half4 e_weights;
-uniform half4 e_kernel;
+float4 main(v2p IN, 
+                        uniform sampler2D colors,
+                        uniform sampler2D normals
+                        ): COLOR
+{
+        // normal discontinuity filter
+        float3 nc = (float3)tex2D(normals, IN.c.xy);
 
-half4 main(v2p) : COLOR
-{
-
-
-        // discontinuity filter
-        /*float nc = tex1D(s_normal, I.tc0);
-        float nd;
-
-        nd.x = dot(nc, float3(tex2D(s_normal, I.tc1));
-        nd.y = dot(nc, float3(tex2D(s_normal, I.tc2));
-        nd.z = dot(nc, float3(tex2D(s_normal, I.tc3));
-        nd.w = dot(nc, float3(tex2D(s_normal, I.tc4));
+        float4 nd;
+        nd.x = dot(nc, float3(tex2D(normals, IN.lt.xy)));
+        nd.y = dot(nc, float3(tex2D(normals, IN.rb.xy)));
+        nd.z = dot(nc, float3(tex2D(normals, IN.rt.xy)));
+        nd.w = dot(nc, float3(tex2D(normals, IN.lb.xy)));
 
         nd -= e_barrier.x;
-        nd = max(0, nd);
+        nd = step(0, nd);
 
         float ne = saturate(dot(nd, e_weights.x));
 
-        float 4 tc5r = = I.tc5.wzyx;
-        float 4 tc6r = = I.tc6.wzyx;
-*/
+        // opposite coordinates
+        float4 lrr = IN.lr.wzyx;
+        float4 tbr = IN.tb.wzyx;
 
+        // depth filter: compute gradient difference:
+        // (c - sample) + (c - opposite sample)
+
+        float4 dc = float4(tex2D(colors, IN.c).w);
+
+        float pos_lt = (float)tex2D(colors, IN.lt.xy).w;
+        float pos_rb = (float)tex2D(colors, IN.rb.xy).w;
+
+        float pos_lb = (float)tex2D(colors, IN.lb.xy).w;
+        float pos_rt = (float)tex2D(colors, IN.rt.xy).w;
+
+        float pos_l = (float)tex2D(colors, IN.lr.xy).w;
+        float pos_r = (float)tex2D(colors, lrr.xy).w;
+
+        float pos_t = (float)tex2D(colors, IN.tb.xy).w;
+        float pos_b = (float)tex2D(colors, tbr.xy).w;
+
+        float4 dd;
+
+        dd.x = pos_lt + pos_rb;
+        dd.y = pos_lb + pos_rt;
+        dd.z = pos_l + pos_r;
+        dd.w = pos_t + pos_b;
+
+        dd = abs(2.0f * dc - dd) - e_barrier.y;
+        dd = step(dd, 0);
+        float de = saturate(dot(dd, e_weights.y));
+
+        // weight: 0 = no aa, 1 = full antialiasing
+        float w = (1.0f - de * ne) * e_kernel.x;
+
+        // smoothed color
+        // (a - c) * w + c = a * w + c * (1 - w)
+        float2 offset = IN.c.xy * (1.0f - w);
+
+        float4 s0 = tex2D(colors, offset + IN.lt.xy * w);
+        float4 s1 = tex2D(colors, offset + IN.rb.xy * w);
+        float4 s2 = tex2D(colors, offset + IN.rt.xy * w);
+        float4 s3 = tex2D(colors, offset + IN.lb.xy * w);
+
+        return (s0 + s1 + s2 + s3) / 4.0f;
+        //return float4(w);
 }
-
-
-
-
-struct fragment
-{
-  float4 pos: WPOS; // normalized screen position
-  float4 texCoord: TEXCOORD0; 
-};
-
-struct pixel
-{
-  float4 color: COLOR0;
-};
-
-
-pixel main(fragment IN, 
-           uniform sampler2D colorsTex1,
-           uniform sampler2D colorsTex2)
-{
-  pixel OUT;
-  
-  float4 col1 = tex2D(colorsTex1, IN.texCoord.xy);
-  float4 col2 = tex2D(colorsTex2, IN.texCoord.xy);
-  
-  const float x = 0.5f;
-  OUT.color = col1 * x + col2 * (1.0f - x);
-
-  return OUT;
-}