NoiseGeneratorPerlin.java

package net.minecraft.world.gen;

import java.util.Random;

public class NoiseGeneratorPerlin extends NoiseGenerator
{
    private NoiseGeneratorSimplex[] field_151603_a;
    private int field_151602_b;
    private static final String __OBFID = "CL_00000536";

    public NoiseGeneratorPerlin(Random p_i45470_1_, int p_i45470_2_)
    {
        this.field_151602_b = p_i45470_2_;
        this.field_151603_a = new NoiseGeneratorSimplex[p_i45470_2_];

        for (int j = 0; j < p_i45470_2_; ++j)
        {
            this.field_151603_a[j] = new NoiseGeneratorSimplex(p_i45470_1_);
        }
    }

    public double func_151601_a(double p_151601_1_, double p_151601_3_)
    {
        double d2 = 0.0D;
        double d3 = 1.0D;

        for (int i = 0; i < this.field_151602_b; ++i)
        {
            d2 += this.field_151603_a[i].func_151605_a(p_151601_1_ * d3, p_151601_3_ * d3) / d3;
            d3 /= 2.0D;
        }

        return d2;
    }

    public double[] func_151599_a(double[] p_151599_1_, double p_151599_2_, double p_151599_4_, int p_151599_6_, int p_151599_7_, double p_151599_8_, double p_151599_10_, double p_151599_12_)
    {
        return this.func_151600_a(p_151599_1_, p_151599_2_, p_151599_4_, p_151599_6_, p_151599_7_, p_151599_8_, p_151599_10_, p_151599_12_, 0.5D);
    }

    public double[] func_151600_a(double[] p_151600_1_, double p_151600_2_, double p_151600_4_, int p_151600_6_, int p_151600_7_, double p_151600_8_, double p_151600_10_, double p_151600_12_, double p_151600_14_)
    {
        if (p_151600_1_ != null && p_151600_1_.length >= p_151600_6_ * p_151600_7_)
        {
            for (int k = 0; k < p_151600_1_.length; ++k)
            {
                p_151600_1_[k] = 0.0D;
            }
        }
        else
        {
            p_151600_1_ = new double[p_151600_6_ * p_151600_7_];
        }

        double d7 = 1.0D;
        double d6 = 1.0D;

        for (int l = 0; l < this.field_151602_b; ++l)
        {
            this.field_151603_a[l].func_151606_a(p_151600_1_, p_151600_2_, p_151600_4_, p_151600_6_, p_151600_7_, p_151600_8_ * d6 * d7, p_151600_10_ * d6 * d7, 0.55D / d7);
            d6 *= p_151600_12_;
            d7 *= p_151600_14_;
        }

        return p_151600_1_;
    }
}