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package net.minecraft.server;
import java.util.Random;
public class WorldChunkManager {
private NoiseGeneratorOctaves2 e;
private NoiseGeneratorOctaves2 f;
private NoiseGeneratorOctaves2 g;
public double[] temperature;
public double[] rain;
public double[] c;
public BiomeBase[] d;
protected WorldChunkManager() {}
public WorldChunkManager(World world) {
this.e = new NoiseGeneratorOctaves2(new Random(world.getSeed() * 9871L), 4);
this.f = new NoiseGeneratorOctaves2(new Random(world.getSeed() * 39811L), 4);
this.g = new NoiseGeneratorOctaves2(new Random(world.getSeed() * 543321L), 2);
}
public BiomeBase a(ChunkCoordIntPair chunkcoordintpair) {
return this.getBiome(chunkcoordintpair.x << 4, chunkcoordintpair.z << 4);
}
public BiomeBase getBiome(int i, int j) {
return this.getBiomeData(i, j, 1, 1)[0];
}
public BiomeBase[] getBiomeData(int i, int j, int k, int l) {
this.d = this.a(this.d, i, j, k, l);
return this.d;
}
public double[] a(double[] adouble, int i, int j, int k, int l) {
if (adouble == null || adouble.length < k * l) {
adouble = new double[k * l];
}
adouble = this.e.a(adouble, (double) i, (double) j, k, l, 0.02500000037252903D, 0.02500000037252903D, 0.25D);
this.c = this.g.a(this.c, (double) i, (double) j, k, l, 0.25D, 0.25D, 0.5882352941176471D);
int i1 = 0;
for (int j1 = 0; j1 < k; ++j1) {
for (int k1 = 0; k1 < l; ++k1) {
double d0 = this.c[i1] * 1.1D + 0.5D;
double d1 = 0.01D;
double d2 = 1.0D - d1;
double d3 = (adouble[i1] * 0.15D + 0.7D) * d2 + d0 * d1;
d3 = 1.0D - (1.0D - d3) * (1.0D - d3);
if (d3 < 0.0D) {
d3 = 0.0D;
}
if (d3 > 1.0D) {
d3 = 1.0D;
}
adouble[i1] = d3;
++i1;
}
}
return adouble;
}
public BiomeBase[] a(BiomeBase[] abiomebase, int i, int j, int k, int l) {
if (abiomebase == null || abiomebase.length < k * l) {
abiomebase = new BiomeBase[k * l];
}
this.temperature = this.e.a(this.temperature, (double) i, (double) j, k, k, 0.02500000037252903D, 0.02500000037252903D, 0.25D);
this.rain = this.f.a(this.rain, (double) i, (double) j, k, k, 0.05000000074505806D, 0.05000000074505806D, 0.3333333333333333D);
this.c = this.g.a(this.c, (double) i, (double) j, k, k, 0.25D, 0.25D, 0.5882352941176471D);
int i1 = 0;
for (int j1 = 0; j1 < k; ++j1) {
for (int k1 = 0; k1 < l; ++k1) {
double d0 = this.c[i1] * 1.1D + 0.5D;
double d1 = 0.01D;
double d2 = 1.0D - d1;
double d3 = (this.temperature[i1] * 0.15D + 0.7D) * d2 + d0 * d1;
d1 = 0.0020D;
d2 = 1.0D - d1;
double d4 = (this.rain[i1] * 0.15D + 0.5D) * d2 + d0 * d1;
d3 = 1.0D - (1.0D - d3) * (1.0D - d3);
if (d3 < 0.0D) {
d3 = 0.0D;
}
if (d4 < 0.0D) {
d4 = 0.0D;
}
if (d3 > 1.0D) {
d3 = 1.0D;
}
if (d4 > 1.0D) {
d4 = 1.0D;
}
this.temperature[i1] = d3;
this.rain[i1] = d4;
abiomebase[i1++] = BiomeBase.a(d3, d4);
}
}
return abiomebase;
}
// CraftBukkit start
public double getHumidity(int x, int z) {
return this.f.a(this.rain, (double)x, (double)z, 1, 1, 0.05000000074505806D, 0.05000000074505806D, 0.3333333333333333D)[0];
}
// CraftBukkit end
}
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