19 lines
No EOL
561 B
GLSL
19 lines
No EOL
561 B
GLSL
/*
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contributors: Ignacio Castaño
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description: Debuging cube http://the-witness.net/news/2012/02/seamless-cube-map-filtering/
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use: <vec3> debugCube(<vec3> _normal, <float> cube_size, <float> lod)
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*/
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#ifndef FNC_DEBUGCUBE
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#define FNC_DEBUGCUBE
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vec3 debugCube(const in vec3 v, const in float cube_size, const in float lod ) {
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float M = max(max(abs(v.x), abs(v.y)), abs(v.z));
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float scale = 1.0 - exp2(lod) / cube_size;
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if (abs(v.x) != M) v.x *= scale;
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if (abs(v.y) != M) v.y *= scale;
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if (abs(v.z) != M) v.z *= scale;
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return v;
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}
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#endif |