    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}