cvsroot/libgender/fsh.cg

// final pixel output:
// data from pixel shader to frame buffer

struct pixelOut {
   float4 col : COLOR;
};
// pixel shader
pixelOut mainPS(vertexOut IN, // input from vertex shade
      uniform float SpecExpon,   // constant parameters fro
      uniform float4 AmbiColor, // application
      uniform float4 SurfColor,
      uniform float4 LightColor
      )
{
   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 +
   // scalar product between light and normal vectors:
   float ldn = dot(Ln,Nn);
   // scalar product between halfway and normal vectors:
   float hdn = dot(Hn,Nn);
   // specialized "lit" function computes weights for
   // diffuse and specular parts:
   float4 litV = lit(ldn,hdn,SpecExpon);
   float4 diffContrib =
   SurfColor * ( litV.y * LightColor + AmbiColor);
   float4 specContrib = litV.y*litV.z * LightColor;
   // sum of diffuse and specular contributions:
   float4 result = diffContrib + specContrib;
   OUT.col = result;
   return OUT;         // output of pixel shader
}

Revision:	1.1
Committed:	Tue Oct 5 06:47:47 2004 UTC (21 years, 11 months ago) by root
Branch:	MAIN
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	// final pixel output:
2			// data from pixel shader to frame buffer
3
4			struct pixelOut {
5			float4 col : COLOR;
6			};
7			// pixel shader
8			pixelOut mainPS(vertexOut IN, // input from vertex shade
9			uniform float SpecExpon, // constant parameters fro
10			uniform float4 AmbiColor, // application
11			uniform float4 SurfColor,
12			uniform float4 LightColor
13			)
14			{
15			pixelOut OUT; // output of the pixel shader
16			float3 Ln = normalize(IN.LightVec);
17			float3 Nn = normalize(IN.WorldNormal);
18			float3 Vn = normalize(IN.WorldView);
19			float3 Hn = normalize(Vn +
20			// scalar product between light and normal vectors:
21			float ldn = dot(Ln,Nn);
22			// scalar product between halfway and normal vectors:
23			float hdn = dot(Hn,Nn);
24			// specialized "lit" function computes weights for
25			// diffuse and specular parts:
26			float4 litV = lit(ldn,hdn,SpecExpon);
27			float4 diffContrib =
28			SurfColor * ( litV.y * LightColor + AmbiColor);
29			float4 specContrib = litV.ylitV.z LightColor;
30			// sum of diffuse and specular contributions:
31			float4 result = diffContrib + specContrib;
32			OUT.col = result;
33			return OUT; // output of pixel shader
34			}
35