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thomasvanta/getNormal

Created August 18, 2019 11:24
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getNormal
vec3 getNormal(vec3 p){
//sampling around the point
vec2 e = vec2(0.01, 0.0);
float d = map(p);
vec3 n = d - vec3(
map(p-e.xyy),
map(p-e.yxy),
map(p-e.yyx));
return normalize(n);
}
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