36 lines
1.0 KiB
Plaintext
36 lines
1.0 KiB
Plaintext
!!VP1.0
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# Compute the diffuse light from a single source
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# c[0]..c[3] contains the concatenation of the modelview and projection matrices.
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# c[4]..c[7] contains the inverse transpose of the modelview
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# c[15] contains the eye position in object space
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# c[16] contains the light direction in object space
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# c[17] contains H, the normalized sum of the eye and light direction
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# c[20] contains the light color * object color
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# c[32] contains the ambient light color * object color
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# c[33] contains the haze color
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# c[40] contains (0, 1, 0, specPower)
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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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# Compute the diffuse light component
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DP3 R2, v[NRML], c[16];
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# Clamp the diffuse component to zero
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MAX R2, R2, c[40].xxxx;
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#ADD R2, c[40].y, -R2;
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#MAD R2, R2, -R2, c[40].y;
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# Output the texture
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MOV o[TEX0], v[TEX0];
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# Output the primary color
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MOV R0, c[32];
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MAD o[COL0], c[20], R2, R0;
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END
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