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struct vertexOut { |
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float4 HPosition : POSITION; |
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float4 TexCoord : TEXCOORD0; |
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float3 LightVec : TEXCOORD1; |
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float3 EyeVec : TEXCOORD2; |
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float3 WorldNormal : TEXCOORD3; |
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}; |
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|
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struct pixelOut { |
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float4 col : COLOR; |
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}; |
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|
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pixelOut main(vertexOut IN) |
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{ |
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pixelOut OUT; // output of the pixel shader |
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|
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float SpecExpon = 120; |
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float4 LightColor = { 1, 1, 1, 1 }; |
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|
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half3 n = IN.WorldNormal; |
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half3 v = IN.EyeVec; |
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half3 l = IN.LightVec; |
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|
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half r = reflect (-v, n); |
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half spec = pow (clamp (dot (l, r), 0, 1), SpecExpon); |
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half diff = clamp (dot (n, l), 0.0, 1); |
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|
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OUT.col = glstate.material.diffuse * diff + LightColor * spec; |
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return OUT; |
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|
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/* |
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float3 Ln = normalize (IN.LightVec); |
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float3 Nn = normalize (IN.WorldNormal); |
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float3 Vn = normalize (IN.EyeVec); |
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|
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float3 Hn = 0.5 * (Ln + Vn); |
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float ldn = dot (Ln, Nn); |
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float hdn = dot (Hn, Nn); |
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|
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// specialized "lit" function computes weights for |
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// diffuse and specular parts: |
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float4 litV = lit (ldn, hdn, SpecExpon); |
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float4 diffContrib = glstate.material.diffuse * (litV.y * LightColor + glstate.lightmodel.ambient); |
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float4 specContrib = litV.y * litV.z * LightColor; |
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float4 result = diffContrib + specContrib; |
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|
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OUT.col = result; |
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return OUT; |
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*/ |
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} |
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