60 lines
1.1 KiB
PHP
60 lines
1.1 KiB
PHP
TEMP dest, cover, stamp;
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TEMP stampTexCoord, normal, destNormal, scalar;
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TEMP R0;
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TEX R0, fragment.texcoord[0], texture[0], 2D;
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$ifndef megagen
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MOV dest, R0.agbr;
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$else
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MOV dest, R0;
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$endif
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TEX cover, fragment.texcoord[1], texture[1], 2D;
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CMP stampTexCoord, program.local[2].x, fragment.texcoord[0], fragment.texcoord[1];
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TEX stamp, stampTexCoord, texture[3], 2D;
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MOV scalar.x, cover;
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ADD scalar.y, 1, -cover.x;
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# decode normal (normalize?)
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MAD R0, stamp, 2, -1;
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# rotate normal
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DP3 normal.x, R0, program.local[0];
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DP3 normal.y, R0, program.local[1];
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MOV normal.z, R0.z;
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# decode destination
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MAD destNormal, dest, 2, -1;
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# flatten normals
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RCP R0, normal.z;
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MUL scalar.x, scalar, R0;
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MUL normal.xy, scalar.x, normal;
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MOV normal.z, 1;
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RCP R0, destNormal.z;
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MUL scalar.y, scalar, R0;
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MUL destNormal.xy, scalar.y, destNormal;
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# add together
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ADD normal.xy, normal, destNormal;
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# normalize
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DP3 R0, normal, normal;
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RSQ R0, R0.x;
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MUL R0, R0.x, normal;
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# encode normals
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MAD R0.rgb, R0, .5, .5;
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MOV R0.a, 1;
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$ifndef megagen
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# swizzle components
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MOV result.color, R0.agbr;
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$else
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MOV result.color, R0;
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$endif
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