20 lines
No EOL
543 B
GLSL
20 lines
No EOL
543 B
GLSL
/*
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contributors: Inigo Quiles
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description: generate the SDF of a bounding box
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use: <float> boxFrameSDF( <vec3> p, <vec3> b, <float> e )
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*/
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#ifndef FNC_BOXFRAMESDF
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#define FNC_BOXFRAMESDF
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float boxFrameSDF( vec3 p, vec3 b, float e ) {
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p = abs(p) - b;
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vec3 q = abs(p + e) - e;
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return min(min(
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length(max(vec3(p.x,q.y,q.z),0.0))+min(max(p.x,max(q.y,q.z)),0.0),
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length(max(vec3(q.x,p.y,q.z),0.0))+min(max(q.x,max(p.y,q.z)),0.0)),
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length(max(vec3(q.x,q.y,p.z),0.0))+min(max(q.x,max(q.y,p.z)),0.0));
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}
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#endif |