Kakusakov

// Clone of https://gist.github.com/Flafla2/1a0b9ebef678bbce3215 with more dimensions and seed generation.

public class PerlinGen
{
    private readonly int[] p;  // Randomly shuffled array of values from 0 to 255.
                               // Values are repeated twice to get performance boost
                               // from avoiding the use of modulo operator.

    public PerlinGen(int seed)
    {