--- libgender/fsh.cg	2004/10/05 08:14:21	1.6
+++ libgender/fsh.cg	2004/10/05 11:06:06	1.9
@@ -1,46 +1,38 @@
-// final pixel output:
-// data from pixel shader to frame buffer
 struct vertexOut {
-   float4 HPosition :   POSITION;
-   float4 TexCoord :    TEXCOORD0;
-   float3 LightVec :    TEXCOORD1;
-   float3 WorldNormal : TEXCOORD2;
-   float3 WorldPos :    TEXCOORD3;
-   float3 WorldView :   TEXCOORD4;
+   float4 HPosition   : POSITION;
+   float4 TexCoord    : TEXCOORD0;
+   float3 LightVec    : TEXCOORD1;
+   float3 EyeVec      : TEXCOORD2;
+   float3 WorldNormal : TEXCOORD3;
 };
 
 struct pixelOut {
    float4 col : COLOR;
 };
 
-// pixel shader
-pixelOut main(vertexOut IN // input from vertex shade
-      //uniform float SpecExpon,   // constant parameters fro
-      //uniform float4 AmbiColor, // application
-      //uniform float4 SurfColor,
-      //uniform float4 LightColor
-      )
+pixelOut main(vertexOut IN)
 {
+   pixelOut OUT;   // output of the pixel shader
+
    float SpecExpon = 120;
    float4 LightColor = { 1, 1, 1, 1 };
 
-   pixelOut OUT;   // output of the pixel shader
-   float3 Ln = normalize(IN.LightVec);
-   float3 Nn = normalize(IN.WorldNormal);
-   float3 Vn = normalize(IN.WorldView);
-   float3 Hn = normalize(Vn + Ln);
-   // scalar product between light and normal vectors:
-   float ldn = abs(dot(Ln,Nn));
-   // scalar product between halfway and normal vectors:
-   float hdn = abs(dot(Hn,Nn));
+   float3 Ln = IN.LightVec;
+   float3 Nn = IN.WorldNormal;
+   float3 Vn = IN.EyeVec;
+
+   float3 Hn = 0.5 * (Ln + Vn);
+   float ldn = dot (Ln, Nn);
+   float hdn = dot (Hn, Nn);
+
    // specialized "lit" function computes weights for
    // diffuse and specular parts:
-   float4 litV = lit(ldn,hdn,SpecExpon);
-   float4 diffContrib = glstate.material.diffuse * ( litV.y * LightColor + glstate.lightmodel.ambient);
-   float4 specContrib = litV.y*litV.z * LightColor;
-   // sum of diffuse and specular contributions:
+   float4 litV = lit (ldn, hdn, SpecExpon);
+   float4 diffContrib = glstate.material.diffuse * (litV.y * LightColor + glstate.lightmodel.ambient);
+   float4 specContrib = litV.y * litV.z * LightColor;
    float4 result = diffContrib + specContrib;
+
    OUT.col = result;
-   return OUT;         // output of pixel shader
+   return OUT;
 }