source: GTP/trunk/App/Demos/Illum/Ogre/Media/PMDemo/PathMap.hlsl @ 2186

uniform float4x4 WorldViewProj;
uniform float2 prmAtlasTiles;
uniform float2 atlasHalfPixel;
uniform sampler2D filteredAtlasSampler : register(s0);

struct vsInputWalk
{
    float4 pos                  : POSITION;
    float2 tex                  : TEXCOORD0;
    float2 texAtlas             : TEXCOORD1;
};

struct vsOutputWalk
{
    float4 pos                  : POSITION;
    float2 tex                  : TEXCOORD0;
    float2 texAtlas             : TEXCOORD1;
};


vsOutputWalk vsWalk(vsInputWalk input)
{
        vsOutputWalk output = (vsOutputWalk)0;
        output.pos = mul(WorldViewProj, input.pos);
        output.tex = input.tex;
        output.texAtlas = input.texAtlas;       
        return output;
}

float4  psWalk(vsOutputWalk input) : COLOR
{
/*      float3 col = 0;
        for(int iCluster=0; iCluster<16; iCluster++)
        {
                float2 prmTexPos = float2(
                        (input.texAtlas.x + (iCluster % prmAtlasTiles.x)) / prmAtlasTiles.x,
                        1.0 - (input.texAtlas.y + (iCluster / prmAtlasTiles.x)) / prmAtlasTiles.y) + atlasHalfPixel;

                float4 weight = 0.065;
                float3 val = tex2D(filteredAtlasSampler, prmTexPos);
                col += val.xyz * weight.x;
                iCluster++;
                
                prmTexPos.x += 1.0 / prmAtlasTiles.x;
                val = tex2D(filteredAtlasSampler, prmTexPos);
                col += val.xyz * weight.y;
                iCluster++;
                
                prmTexPos.x += 1.0 / prmAtlasTiles.x;
                val = tex2D(filteredAtlasSampler, prmTexPos);
                col += val.xyz * weight.z;
                iCluster++;
                
                prmTexPos.x += 1.0 / prmAtlasTiles.x;
                val = tex2D(filteredAtlasSampler, prmTexPos);
                col += val.xyz * weight.w;
        }
*/
        float ff = (float)prmAtlasTiles.x;
        return float4( float3(ff,ff,ff) / 128.0/* + col*0.000000001*/, 1);
}