31 lines
879 B
Plaintext
31 lines
879 B
Plaintext
!!VP1.0
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# Vertex program use for applying shadow textures. 2D texture coordinates
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# are generated from vertex coordinates using the s and t texture planes
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# in constants c[41] and c[42].
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#
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# c[0]..c[3] contains the concatenation of the modelview and projection
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# matrices.
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# c[20] contains the color
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# c[41]..c[42] contain the texture transformation
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# c[16] contains the light direction; used to compute texture coordinates
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# for a 'shadow mask' texture used to prevent shadows from appearing on
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# the wrong side of an object.
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# Transform the vertex by the modelview matrix
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DP4 o[HPOS].x, c[0], v[OPOS];
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DP4 o[HPOS].y, c[1], v[OPOS];
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DP4 o[HPOS].z, c[2], v[OPOS];
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DP4 o[HPOS].w, c[3], v[OPOS];
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# Generate texture coordinates
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DP4 o[TEX0].x, c[41], v[OPOS];
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DP4 o[TEX0].y, c[42], v[OPOS];
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DP4 o[TEX1].x, c[16], v[OPOS];
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# Color
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MOV o[COL0], c[20];
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END
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