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40 lines
1.1 KiB
40 lines
1.1 KiB
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const float3 g_OverbrightFactor : register( c0 );
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const float3 g_SelfIllumTint : register( c1 );
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const float3 g_EnvmapTint : register( c2 );
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sampler BumpmapSampler : register( s0 );
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struct PS_INPUT
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{
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float2 vBumpTexCoord : TEXCOORD0;
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float3 vTangentSpaceLightDir : TEXCOORD1;
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float3 vAmbientColor : TEXCOORD2;
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float4 vDirLightScale : COLOR0;
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};
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float4 main( PS_INPUT i ) : COLOR
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{
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float4 baseColor = tex2D( BumpmapSampler, i.vBumpTexCoord );
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// Dot the bump normal and the light vector.
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float4 vBumpMapNormal = (baseColor - 0.5); // The format of the sphere map is 0 to 1,
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// so this is now -0.5 to 0.5.
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float3 vTangentSpaceLightDir = (i.vTangentSpaceLightDir - 0.5) * 2; // This is -1 to 1
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float4 vOutput = dot( vBumpMapNormal, vTangentSpaceLightDir ) + 0.5;
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// Scale by the light color outputted by the vertex shader (ie: based on distance).
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vOutput *= i.vDirLightScale;
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// Add ambient.
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vOutput += float4( i.vAmbientColor.x, i.vAmbientColor.y, i.vAmbientColor.z, 0 );
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// Alpha = normal map alpha * vertex alpha
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vOutput.a = baseColor.a * i.vDirLightScale.a;
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return vOutput;
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}
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