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by J3L2404 5973 days ago
Where are the permutation numbers derived from?
1 comments
rohitarondekar 5973 days ago
They are generated randomly. Ken Perlin has described it in his book Texturing, Modeling A Procedural Approach. If I remember correctly the numbers have to be such that every direction should have an equal chance. Even distribution I think.
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J3L2404 5973 days ago
I was thinking it would be more like the fast inverse square from Quake. If it's random, using the same code could be a problem, no?
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