    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}