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I'm having some problem understanding the Perlin Noise algorithm and none of the explanation I found go into this (probably obvious)detail.

From what function is the gradient on it? Is it from the blending function?

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  • \$\begingroup\$ No idea what the question is. \$\endgroup\$ – Krythic Oct 23 '16 at 3:11
  • \$\begingroup\$ If you are aware of what the Perlin Noise algorithm you know it uses a gradient. But on all implementations they use a pre computed table for the gradient and I don't understand from what was the gradient. \$\endgroup\$ – Leonardo Marques Oct 23 '16 at 12:39
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The gradient is between the dot products of vectors to corners and randomly chosen vectors.

The pre-computed table you are looking at is likely part of the hash-function. (used to generate random numbers in a way that stays constant between calls)

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