28 lines
872 B
GLSL
28 lines
872 B
GLSL
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!!ARBfp1.0
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PARAM dx = program.local[0];
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PARAM darkness = program.local[1];
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PARAM render = program.local[2];
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PARAM f = {1.442695041, 1.442695041, 1.442695041, 0.01};
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TEMP temp, shadow, flame, spec, value;
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TEX temp, fragment.texcoord[0], texture[0], 3D;
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TEX shadow, fragment.texcoord[0], texture[1], 3D;
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TEX flame, fragment.texcoord[0], texture[2], 3D;
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TEX spec, flame.r, texture[3], 1D;
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# calculate shading factor from density
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MUL value.r, temp.a, darkness.a;
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MUL value.r, value.r, dx.r;
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MUL value.r, value.r, f.r;
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EX2 temp, -value.r;
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# alpha
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SUB temp.a, 1.0, temp.r;
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# shade colors
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MUL temp.r, temp.r, shadow.r;
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MUL temp.g, temp.g, shadow.r;
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MUL temp.b, temp.b, shadow.r;
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MUL temp.r, temp.r, darkness.r;
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MUL temp.g, temp.g, darkness.g;
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MUL temp.b, temp.b, darkness.b;
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# for now this just replace smoke shading if rendering fire
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CMP result.color, render.r, temp, spec;
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END
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