17 lines
No EOL
446 B
HLSL
17 lines
No EOL
446 B
HLSL
/*
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contributors: Inigo Quiles
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description: Substraction operation of two SDFs
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use: <float> opSubstraction( in <float> d1, in <float> d2 [, <float> smooth_factor])
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*/
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#ifndef FNC_OPSUBSTRACTION
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#define FNC_OPSUBSTRACTION
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float opSubtraction( float d1, float d2 ) { return max(-d1,d2); }
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float opSubtraction( float d1, float d2, float k ) {
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float h = saturate( 0.5 - 0.5*(d2+d1)/k );
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return lerp( d2, -d1, h ) + k*h*(1.0-h);
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}
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#endif |