package net.minecraft.world.gen;
import java.util.Random;
public class NoiseGeneratorImproved extends NoiseGenerator
{
private int[] permutations;
public double xCoord;
public double yCoord;
public double zCoord;
private static final double[] field_152381_e = new double[] {1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D, 0.0D, 0.0D, 0.0D, 0.0D, 1.0D, 0.0D, -1.0D, 0.0D};
private static final double[] field_152382_f = new double[] {1.0D, 1.0D, -1.0D, -1.0D, 0.0D, 0.0D, 0.0D, 0.0D, 1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D};
private static final double[] field_152383_g = new double[] {0.0D, 0.0D, 0.0D, 0.0D, 1.0D, 1.0D, -1.0D, -1.0D, 1.0D, 1.0D, -1.0D, -1.0D, 0.0D, 1.0D, 0.0D, -1.0D};
private static final double[] field_152384_h = new double[] {1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D, 1.0D, -1.0D, 0.0D, 0.0D, 0.0D, 0.0D, 1.0D, 0.0D, -1.0D, 0.0D};
private static final double[] field_152385_i = new double[] {0.0D, 0.0D, 0.0D, 0.0D, 1.0D, 1.0D, -1.0D, -1.0D, 1.0D, 1.0D, -1.0D, -1.0D, 0.0D, 1.0D, 0.0D, -1.0D};
private static final String __OBFID = "CL_00000534";
public NoiseGeneratorImproved()
{
this(new Random());
}
public NoiseGeneratorImproved(Random p_i45469_1_)
{
this.permutations = new int[512];
this.xCoord = p_i45469_1_.nextDouble() * 256.0D;
this.yCoord = p_i45469_1_.nextDouble() * 256.0D;
this.zCoord = p_i45469_1_.nextDouble() * 256.0D;
int i;
for (i = 0; i < 256; this.permutations[i] = i++)
{
;
}
for (i = 0; i < 256; ++i)
{
int j = p_i45469_1_.nextInt(256 - i) + i;
int k = this.permutations[i];
this.permutations[i] = this.permutations[j];
this.permutations[j] = k;
this.permutations[i + 256] = this.permutations[i];
}
}
public final double lerp(double p_76311_1_, double p_76311_3_, double p_76311_5_)
{
return p_76311_3_ + p_76311_1_ * (p_76311_5_ - p_76311_3_);
}
public final double func_76309_a(int p_76309_1_, double p_76309_2_, double p_76309_4_)
{
int j = p_76309_1_ & 15;
return field_152384_h[j] * p_76309_2_ + field_152385_i[j] * p_76309_4_;
}
public final double grad(int p_76310_1_, double p_76310_2_, double p_76310_4_, double p_76310_6_)
{
int j = p_76310_1_ & 15;
return field_152381_e[j] * p_76310_2_ + field_152382_f[j] * p_76310_4_ + field_152383_g[j] * p_76310_6_;
}
/**
* pars: noiseArray , xOffset , yOffset , zOffset , xSize , ySize , zSize , xScale, yScale , zScale , noiseScale.
* noiseArray should be xSize*ySize*zSize in size
*/
public void populateNoiseArray(double[] p_76308_1_, double p_76308_2_, double p_76308_4_, double p_76308_6_, int p_76308_8_, int p_76308_9_, int p_76308_10_, double p_76308_11_, double p_76308_13_, double p_76308_15_, double p_76308_17_)
{
int l;
int i1;
double d9;
double d11;
int l1;
double d12;
int i2;
int j2;
double d13;
int k5;
int j6;
if (p_76308_9_ == 1)
{
boolean flag7 = false;
boolean flag8 = false;
boolean flag = false;
boolean flag9 = false;
double d21 = 0.0D;
double d22 = 0.0D;
k5 = 0;
double d23 = 1.0D / p_76308_17_;
for (int j1 = 0; j1 < p_76308_8_; ++j1)
{
d9 = p_76308_2_ + (double)j1 * p_76308_11_ + this.xCoord;
int i6 = (int)d9;
if (d9 < (double)i6)
{
--i6;
}
int k1 = i6 & 255;
d9 -= (double)i6;
d11 = d9 * d9 * d9 * (d9 * (d9 * 6.0D - 15.0D) + 10.0D);
for (l1 = 0; l1 < p_76308_10_; ++l1)
{
d12 = p_76308_6_ + (double)l1 * p_76308_15_ + this.zCoord;
i2 = (int)d12;
if (d12 < (double)i2)
{
--i2;
}
j2 = i2 & 255;
d12 -= (double)i2;
d13 = d12 * d12 * d12 * (d12 * (d12 * 6.0D - 15.0D) + 10.0D);
l = this.permutations[k1] + 0;
int i4 = this.permutations[l] + j2;
int j4 = this.permutations[k1 + 1] + 0;
i1 = this.permutations[j4] + j2;
d21 = this.lerp(d11, this.func_76309_a(this.permutations[i4], d9, d12), this.grad(this.permutations[i1], d9 - 1.0D, 0.0D, d12));
d22 = this.lerp(d11, this.grad(this.permutations[i4 + 1], d9, 0.0D, d12 - 1.0D), this.grad(this.permutations[i1 + 1], d9 - 1.0D, 0.0D, d12 - 1.0D));
double d24 = this.lerp(d13, d21, d22);
j6 = k5++;
p_76308_1_[j6] += d24 * d23;
}
}
}
else
{
l = 0;
double d7 = 1.0D / p_76308_17_;
i1 = -1;
boolean flag1 = false;
boolean flag2 = false;
boolean flag3 = false;
boolean flag4 = false;
boolean flag5 = false;
boolean flag6 = false;
double d8 = 0.0D;
d9 = 0.0D;
double d10 = 0.0D;
d11 = 0.0D;
for (l1 = 0; l1 < p_76308_8_; ++l1)
{
d12 = p_76308_2_ + (double)l1 * p_76308_11_ + this.xCoord;
i2 = (int)d12;
if (d12 < (double)i2)
{
--i2;
}
j2 = i2 & 255;
d12 -= (double)i2;
d13 = d12 * d12 * d12 * (d12 * (d12 * 6.0D - 15.0D) + 10.0D);
for (int k2 = 0; k2 < p_76308_10_; ++k2)
{
double d14 = p_76308_6_ + (double)k2 * p_76308_15_ + this.zCoord;
int l2 = (int)d14;
if (d14 < (double)l2)
{
--l2;
}
int i3 = l2 & 255;
d14 -= (double)l2;
double d15 = d14 * d14 * d14 * (d14 * (d14 * 6.0D - 15.0D) + 10.0D);
for (int j3 = 0; j3 < p_76308_9_; ++j3)
{
double d16 = p_76308_4_ + (double)j3 * p_76308_13_ + this.yCoord;
int k3 = (int)d16;
if (d16 < (double)k3)
{
--k3;
}
int l3 = k3 & 255;
d16 -= (double)k3;
double d17 = d16 * d16 * d16 * (d16 * (d16 * 6.0D - 15.0D) + 10.0D);
if (j3 == 0 || l3 != i1)
{
i1 = l3;
int k4 = this.permutations[j2] + l3;
int l4 = this.permutations[k4] + i3;
int i5 = this.permutations[k4 + 1] + i3;
int j5 = this.permutations[j2 + 1] + l3;
k5 = this.permutations[j5] + i3;
int l5 = this.permutations[j5 + 1] + i3;
d8 = this.lerp(d13, this.grad(this.permutations[l4], d12, d16, d14), this.grad(this.permutations[k5], d12 - 1.0D, d16, d14));
d9 = this.lerp(d13, this.grad(this.permutations[i5], d12, d16 - 1.0D, d14), this.grad(this.permutations[l5], d12 - 1.0D, d16 - 1.0D, d14));
d10 = this.lerp(d13, this.grad(this.permutations[l4 + 1], d12, d16, d14 - 1.0D), this.grad(this.permutations[k5 + 1], d12 - 1.0D, d16, d14 - 1.0D));
d11 = this.lerp(d13, this.grad(this.permutations[i5 + 1], d12, d16 - 1.0D, d14 - 1.0D), this.grad(this.permutations[l5 + 1], d12 - 1.0D, d16 - 1.0D, d14 - 1.0D));
}
double d18 = this.lerp(d17, d8, d9);
double d19 = this.lerp(d17, d10, d11);
double d20 = this.lerp(d15, d18, d19);
j6 = l++;
p_76308_1_[j6] += d20 * d7;
}
}
}
}
}
}