GenLayerVoronoiExtended.java

package zmaster587.advancedRocketry.world.gen;

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

public class GenLayerVoronoiExtended extends GenLayer {
	
	public GenLayerVoronoiExtended(long p_i2133_1_, GenLayer p_i2133_3_)
	    {
	        super(p_i2133_1_);
	        super.parent = p_i2133_3_;
	    }

	    /**
	     * 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.
	     */
	    public int[] getInts(int p_75904_1_, int p_75904_2_, int p_75904_3_, int p_75904_4_)
	    {
	        p_75904_1_ -= 2;
	        p_75904_2_ -= 2;
	        int i1 = p_75904_1_ >> 2;
	        int j1 = p_75904_2_ >> 2;
	        int k1 = (p_75904_3_ >> 2) + 2;
	        int l1 = (p_75904_4_ >> 2) + 2;
	        int[] aint = this.parent.getInts(i1, j1, k1, l1);
	        int i2 = k1 - 1 << 2;
	        int j2 = l1 - 1 << 2;
	        int[] aint1 = IntCache.getIntCache(i2 * j2);
	        int l2;

	        for (int k2 = 0; k2 < l1 - 1; ++k2)
	        {
	            l2 = 0;
	            int i3 = aint[l2 + 0 + (k2 + 0) * k1];

	            for (int j3 = aint[l2 + 0 + (k2 + 1) * k1]; l2 < k1 - 1; ++l2)
	            {
	                double d0 = 3.6D;
	                this.initChunkSeed((long)(l2 + i1 << 2), (long)(k2 + j1 << 2));
	                double d1 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D;
	                double d2 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D;
	                this.initChunkSeed((long)(l2 + i1 + 1 << 2), (long)(k2 + j1 << 2));
	                double d3 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D + 4.0D;
	                double d4 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D;
	                this.initChunkSeed((long)(l2 + i1 << 2), (long)(k2 + j1 + 1 << 2));
	                double d5 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D;
	                double d6 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D + 4.0D;
	                this.initChunkSeed((long)(l2 + i1 + 1 << 2), (long)(k2 + j1 + 1 << 2));
	                double d7 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D + 4.0D;
	                double d8 = ((double)this.nextInt(1024) / 1024.0D - 0.5D) * 3.6D + 4.0D;
	                int k3 = aint[l2 + 1 + (k2 + 0) * k1];
	                int l3 = aint[l2 + 1 + (k2 + 1) * k1];

	                for (int i4 = 0; i4 < 4; ++i4)
	                {
	                    int j4 = ((k2 << 2) + i4) * i2 + (l2 << 2);

	                    for (int k4 = 0; k4 < 4; ++k4)
	                    {
	                        double d9 = ((double)i4 - d2) * ((double)i4 - d2) + ((double)k4 - d1) * ((double)k4 - d1);
	                        double d10 = ((double)i4 - d4) * ((double)i4 - d4) + ((double)k4 - d3) * ((double)k4 - d3);
	                        double d11 = ((double)i4 - d6) * ((double)i4 - d6) + ((double)k4 - d5) * ((double)k4 - d5);
	                        double d12 = ((double)i4 - d8) * ((double)i4 - d8) + ((double)k4 - d7) * ((double)k4 - d7);

	                        if (d9 < d10 && d9 < d11 && d9 < d12)
	                        {
	                            aint1[j4++] = i3;
	                        }
	                        else if (d10 < d9 && d10 < d11 && d10 < d12)
	                        {
	                            aint1[j4++] = k3;
	                        }
	                        else if (d11 < d9 && d11 < d10 && d11 < d12)
	                        {
	                            aint1[j4++] = j3;
	                        }
	                        else
	                        {
	                            aint1[j4++] = l3;
	                        }
	                    }
	                }

	                i3 = k3;
	                j3 = l3;
	            }
	        }

	        int[] aint2 = IntCache.getIntCache(p_75904_3_ * p_75904_4_);

	        for (l2 = 0; l2 < p_75904_4_; ++l2)
	        {
	            System.arraycopy(aint1, (l2 + (p_75904_2_ & 3)) * i2 + (p_75904_1_ & 3), aint2, l2 * p_75904_3_, p_75904_3_);
	        }

	        return aint2;
	    }
}