001package net.minecraft.world.gen.layer;
002
003import net.minecraft.world.biome.BiomeGenBase;
004
005public class GenLayerAddMushroomIsland extends GenLayer
006{
007    public GenLayerAddMushroomIsland(long par1, GenLayer par3GenLayer)
008    {
009        super(par1);
010        this.parent = par3GenLayer;
011    }
012
013    /**
014     * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
015     * amounts, or biomeList[] indices based on the particular GenLayer subclass.
016     */
017    public int[] getInts(int par1, int par2, int par3, int par4)
018    {
019        int i1 = par1 - 1;
020        int j1 = par2 - 1;
021        int k1 = par3 + 2;
022        int l1 = par4 + 2;
023        int[] aint = this.parent.getInts(i1, j1, k1, l1);
024        int[] aint1 = IntCache.getIntCache(par3 * par4);
025
026        for (int i2 = 0; i2 < par4; ++i2)
027        {
028            for (int j2 = 0; j2 < par3; ++j2)
029            {
030                int k2 = aint[j2 + 0 + (i2 + 0) * k1];
031                int l2 = aint[j2 + 2 + (i2 + 0) * k1];
032                int i3 = aint[j2 + 0 + (i2 + 2) * k1];
033                int j3 = aint[j2 + 2 + (i2 + 2) * k1];
034                int k3 = aint[j2 + 1 + (i2 + 1) * k1];
035                this.initChunkSeed((long)(j2 + par1), (long)(i2 + par2));
036
037                if (k3 == 0 && k2 == 0 && l2 == 0 && i3 == 0 && j3 == 0 && this.nextInt(100) == 0)
038                {
039                    aint1[j2 + i2 * par3] = BiomeGenBase.mushroomIsland.biomeID;
040                }
041                else
042                {
043                    aint1[j2 + i2 * par3] = k3;
044                }
045            }
046        }
047
048        return aint1;
049    }
050}