Changeset 3045 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/mrt.cg

Timestamp:

10/19/08 23:42:15 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/mrt.cg (modified) (7 diffs)

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

@@ -3 +3 @@
 {
   float4 position: POSITION;
-  float3 normal: NORMAL;
+  float4 normal: NORMAL;
   float4 color: COLOR0;
   float4 texCoord: TEXCOORD0;
@@ -17 +17 @@
         float4 color: COLOR0;  
         float4 eyePos: TEXCOORD1; // eye position
-        float3 normal: TEXCOORD2;
+        float4 normal: TEXCOORD2;
 };
 
@@ -30 +30 @@
         float4 winPos: WPOS;
         float4 eyePos: TEXCOORD1; // eye position
-        float3 normal: TEXCOORD2;
+        float4 normal: TEXCOORD2;
 };
 
@@ -56 +56 @@
         OUT.position = mul(glstate.matrix.mvp, IN.position);
 
-        OUT.normal = IN.normal;
+        OUT.normal = mul(glstate.matrix.invtrans.modelview[0], IN.normal);
 
         return OUT;
@@ -63 +63 @@
 
 pixel fragtex(fragin IN, 
-                          uniform sampler2D tex
+                          uniform sampler2D tex,
+                          uniform float4x4 viewMatrix
                           )
 {
@@ -76 +77 @@
         // hack: use combination of emmisive + diffuse (emmisive used as constant ambient term)
         pix.col = (glstate.material.emission + glstate.material.diffuse) * texColor; 
-        // save world space normal in rt
-        pix.norm = IN.normal;
+        // save world space normal in rt => transform back into world space by
+        // multiplying with inverse view. since transforming normal with T means to 
+        // multiply with the inverse transpose of T, we multiple with Transp(Inv(Inv(view))) = Transp(view)
+        pix.norm = mul(transpose(viewMatrix), IN.normal);
         // compute eye linear depth
         pix.col.w = length(IN.eyePos.xyz);
@@ -87 +90 @@
 
 
-pixel frag(fragin IN)
+pixel frag(fragin IN,  uniform float4x4 viewMatrix)
 {
         pixel pix;
         // hack: use comination of emmisive + diffuse (emmisive used as constant ambient term)
         pix.col = glstate.material.diffuse + glstate.material.emission;
-        // save world space normal in rt
-        pix.norm = IN.normal;
+        // save world space normal in rt => transform back into world space by
+        // multiplying with inverse view. since transforming normal with T means to 
+        // multiply with the inverse transpose of T, we multiple with Transp(Inv(Inv(view))) = Transp(view)
+        pix.norm = mul(transpose(viewMatrix), IN.normal);
         // eye space depth
         pix.col.w = length(IN.eyePos.xyz);