38 lines
739 B
GLSL
38 lines
739 B
GLSL
!!FP1.0
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# Diffuse bump map + texture
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# Base texture in tex 0
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# Normal map in tex 1
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# Ambient color in constant 5
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# Get the base texture color
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TEX H0, f[TEX0], TEX0, 2D;
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# Get the normal map value
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TEX H1, f[TEX1], TEX1, 2D;
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# Unpack the unsigned texture components into a normal
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MADX H1, H1, 2.0, -1.0;
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# The diffuse color contains the tangent space normal; unpack it into H2
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MADX H2, f[COL0], 2.0, -1.0;
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# Compute the diffuse term
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DP3X H3.w, H1, H2;
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# Compute the self shadowing term--multiplying by a factor of 8 gives
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# a steep ramp function
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MULH_SAT H1.w, H2.z, 8.0;
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# Add the product of the diffuse and self shadowing terms to the
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# ambient color.
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MADX H3.xyz, H1.w, H3.w, p[5];
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MULX H0.xyz, H3, H0;
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MOVX o[COLR], H0;
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END
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