001package net.minecraft.world.gen.layer;
002
003public class GenLayerFuzzyZoom extends GenLayer
004{
005    public GenLayerFuzzyZoom(long par1, GenLayer par3GenLayer)
006    {
007        super(par1);
008        super.parent = par3GenLayer;
009    }
010
011    /**
012     * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
013     * amounts, or biomeList[] indices based on the particular GenLayer subclass.
014     */
015    public int[] getInts(int par1, int par2, int par3, int par4)
016    {
017        int var5 = par1 >> 1;
018        int var6 = par2 >> 1;
019        int var7 = (par3 >> 1) + 3;
020        int var8 = (par4 >> 1) + 3;
021        int[] var9 = this.parent.getInts(var5, var6, var7, var8);
022        int[] var10 = IntCache.getIntCache(var7 * 2 * var8 * 2);
023        int var11 = var7 << 1;
024        int var13;
025
026        for (int var12 = 0; var12 < var8 - 1; ++var12)
027        {
028            var13 = var12 << 1;
029            int var14 = var13 * var11;
030            int var15 = var9[0 + (var12 + 0) * var7];
031            int var16 = var9[0 + (var12 + 1) * var7];
032
033            for (int var17 = 0; var17 < var7 - 1; ++var17)
034            {
035                this.initChunkSeed((long)(var17 + var5 << 1), (long)(var12 + var6 << 1));
036                int var18 = var9[var17 + 1 + (var12 + 0) * var7];
037                int var19 = var9[var17 + 1 + (var12 + 1) * var7];
038                var10[var14] = var15;
039                var10[var14++ + var11] = this.choose(var15, var16);
040                var10[var14] = this.choose(var15, var18);
041                var10[var14++ + var11] = this.choose(var15, var18, var16, var19);
042                var15 = var18;
043                var16 = var19;
044            }
045        }
046
047        int[] var20 = IntCache.getIntCache(par3 * par4);
048
049        for (var13 = 0; var13 < par4; ++var13)
050        {
051            System.arraycopy(var10, (var13 + (par2 & 1)) * (var7 << 1) + (par1 & 1), var20, var13 * par3, par3);
052        }
053
054        return var20;
055    }
056
057    /**
058     * randomly choose between the two args
059     */
060    protected int choose(int par1, int par2)
061    {
062        return this.nextInt(2) == 0 ? par1 : par2;
063    }
064
065    /**
066     * randomly choose between the four args
067     */
068    protected int choose(int par1, int par2, int par3, int par4)
069    {
070        int var5 = this.nextInt(4);
071        return var5 == 0 ? par1 : (var5 == 1 ? par2 : (var5 == 2 ? par3 : par4));
072    }
073}