15 lines
371 B
HLSL
15 lines
371 B
HLSL
/*
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contributors: Inigo Quiles
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description: Segment SDF
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use: lineSDF(<float2> st, <float2> A, <float2> B)
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*/
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#ifndef FNC_LINESDF
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#define FNC_LINESDF
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float lineSDF( in float2 st, in float2 a, in float2 b ) {
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float2 b_to_a = b - a;
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float2 to_a = st - a;
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float h = saturate(dot(to_a, b_to_a)/dot(b_to_a, b_to_a));
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return length(to_a - h * b_to_a );
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}
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#endif
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