17 lines
No EOL
439 B
Text
17 lines
No EOL
439 B
Text
/*
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contributors: Inigo Quiles
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description: generate the SDF of a tetrahedron
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use: <float> tetrahedronSDF( <float3> pos, <float> h )
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*/
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#ifndef FNC_TETRAHEDRONSDF
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#define FNC_TETRAHEDRONSDF
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float tetrahedronSDF(float3 p, float h) {
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float3 q = abs(p);
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float y = p.y;
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float d1 = q.z-max(0.,y);
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float d2 = max(q.x*.5 + y*.5,.0) - min(h, h+y);
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return length(max(float2(d1,d2),.005)) + min(max(d1,d2), 0.0);
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}
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#endif |