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fuqunaga/rand2n

Created March 9, 2019 03:38
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rand2n
vec2 rand2n() {
seed+=vec2(-1,1);
// implementation based on: lumina.sourceforge.net/Tutorials/Noise.html
return vec2(fract(sin(dot(seed.xy ,vec2(12.9898,78.233))) * 43758.5453),
fract(cos(dot(seed.xy ,vec2(4.898,7.23))) * 23421.631));
};
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