16 lines
No EOL
517 B
HLSL
16 lines
No EOL
517 B
HLSL
/*
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contributors: Inigo Quiles
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description: generate the SDF of a torus
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use: <float> torusSDF( in <float3> pos, in <float2> h [, in <float> ra, in <float> rb] )
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*/
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#ifndef FNC_TORUSSDF
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#define FNC_TORUSSDF
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float torusSDF( float3 p, float2 t ) { return length( float2(length(p.xz)-t.x,p.y) )-t.y; }
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float torusSDF(in float3 p, in float2 sc, in float ra, in float rb) {
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p.x = abs(p.x);
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float k = (sc.y*p.x>sc.x*p.y) ? dot(p.xy,sc) : length(p.xy);
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return sqrt( dot(p,p) + ra*ra - 2.0*ra*k ) - rb;
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}
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#endif |