source: GTP/trunk/App/Demos/Illum/Illumination Networks Demo [OpenGL]/src/InternalLightIlluminatePrograms.cg @ 845

#define D 128

struct VertexOut
{
        float4 VertexPosition           :POSITION;
        float2 TexCoord                         :TEXCOORD;
        int ID                                          :TEXCOORD1;
};


/*
  Vertex program for cloud rendering 
*/
VertexOut VertexProgram( float4 Position :POSITION,
                                                float2 Texcoord: TEXCOORD
                                                )                                                                       
{
        VertexOut Out;  
        
        Out.VertexPosition=Position;
        Out.TexCoord=Texcoord;
        Out.ID=Texcoord.x;      
        
        return Out;     
}

/*
  Fragment program for cloud rendering 
*/
float3 FragmentProgram( VertexOut       In,
                                                uniform samplerRECT LVisMap,
                                                uniform samplerRECT Phase,
                                                uniform float4 LightDirsWeights,
                                                uniform float3 LightRad,
                                                uniform float3 LightRad2,
                                                uniform float2 Alb_Op):COLOR
{       
        float3 Color=float3(0,0,0);     
        
        int direction=floor(In.TexCoord.y);
        int negDir=D-1-direction;
        int particle=In.ID;
        
        
        if(floor(In.TexCoord.x)==500)
        {
                //Color=LightRad;
                Color=float3(18,12,0);
        }       
                
        return Color;
}