BiomesOPlenty/common/biomesoplenty/world/layer/BiomeLayerVoronoiZoom.java

package biomesoplenty.world.layer;

import net.minecraft.world.gen.layer.IntCache;

public class BiomeLayerVoronoiZoom extends BiomeLayer
{
	public BiomeLayerVoronoiZoom(long par1, BiomeLayer par3GenLayer)
	{
		super(par1);
		super.parent = par3GenLayer;
	}

	/**
	 * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
	 * amounts, or biomeList[] indices based on the particular GenLayer subclass.
	 */
	@Override
	public int[] getInts(int par1, int par2, int par3, int par4)
	{
		par1 -= 2;
		par2 -= 2;
		byte b0 = 2;
		int i1 = 1 << b0;
		int j1 = par1 >> b0;
		int k1 = par2 >> b0;
		int l1 = (par3 >> b0) + 3;
		int i2 = (par4 >> b0) + 3;
		int[] aint = parent.getInts(j1, k1, l1, i2);
		int j2 = l1 << b0;
		int k2 = i2 << b0;
		int[] aint1 = IntCache.getIntCache(j2 * k2);
		int l2;

		for (int i3 = 0; i3 < i2 - 1; ++i3)
		{
			l2 = aint[0 + (i3 + 0) * l1];
			int j3 = aint[0 + (i3 + 1) * l1];

			for (int k3 = 0; k3 < l1 - 1; ++k3)
			{
				double d0 = i1 * 0.9D;
				this.initChunkSeed(k3 + j1 << b0, i3 + k1 << b0);
				double d1 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
				double d2 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
				this.initChunkSeed(k3 + j1 + 1 << b0, i3 + k1 << b0);
				double d3 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
				double d4 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
				this.initChunkSeed(k3 + j1 << b0, i3 + k1 + 1 << b0);
				double d5 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0;
				double d6 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
				this.initChunkSeed(k3 + j1 + 1 << b0, i3 + k1 + 1 << b0);
				double d7 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
				double d8 = (this.nextInt(1024) / 1024.0D - 0.5D) * d0 + i1;
				int l3 = aint[k3 + 1 + (i3 + 0) * l1];
				int i4 = aint[k3 + 1 + (i3 + 1) * l1];

				for (int j4 = 0; j4 < i1; ++j4)
				{
					int k4 = ((i3 << b0) + j4) * j2 + (k3 << b0);

					for (int l4 = 0; l4 < i1; ++l4)
					{
						double d9 = (j4 - d2) * (j4 - d2) + (l4 - d1) * (l4 - d1);
						double d10 = (j4 - d4) * (j4 - d4) + (l4 - d3) * (l4 - d3);
						double d11 = (j4 - d6) * (j4 - d6) + (l4 - d5) * (l4 - d5);
						double d12 = (j4 - d8) * (j4 - d8) + (l4 - d7) * (l4 - d7);

						if (d9 < d10 && d9 < d11 && d9 < d12)
						{
							aint1[k4++] = l2;
						}
						else if (d10 < d9 && d10 < d11 && d10 < d12)
						{
							aint1[k4++] = l3;
						}
						else if (d11 < d9 && d11 < d10 && d11 < d12)
						{
							aint1[k4++] = j3;
						}
						else
						{
							aint1[k4++] = i4;
						}
					}
				}

				l2 = l3;
				j3 = i4;
			}
		}

		int[] aint2 = IntCache.getIntCache(par3 * par4);

		for (l2 = 0; l2 < par4; ++l2)
		{
			System.arraycopy(aint1, (l2 + (par2 & i1 - 1)) * (l1 << b0) + (par1 & i1 - 1), aint2, l2 * par3, par3);
		}

		return aint2;
	}
}