001package net.minecraft.world.gen.layer;
002
003import net.minecraft.world.biome.BiomeGenBase;
004
005public class GenLayerAddSnow extends GenLayer
006{
007    public GenLayerAddSnow(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 + 1 + (i2 + 1) * k1];
031                this.initChunkSeed((long)(j2 + par1), (long)(i2 + par2));
032
033                if (k2 == 0)
034                {
035                    aint1[j2 + i2 * par3] = 0;
036                }
037                else
038                {
039                    int l2 = this.nextInt(5);
040
041                    if (l2 == 0)
042                    {
043                        l2 = BiomeGenBase.icePlains.biomeID;
044                    }
045                    else
046                    {
047                        l2 = 1;
048                    }
049
050                    aint1[j2 + i2 * par3] = l2;
051                }
052            }
053        }
054
055        return aint1;
056    }
057}