001package net.minecraft.world.gen.layer;
002
003import net.minecraft.world.biome.BiomeGenBase;
004
005public class GenLayerSwampRivers extends GenLayer
006{
007    public GenLayerSwampRivers(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[] aint = this.parent.getInts(par1 - 1, par2 - 1, par3 + 2, par4 + 2);
020        int[] aint1 = IntCache.getIntCache(par3 * par4);
021
022        for (int i1 = 0; i1 < par4; ++i1)
023        {
024            for (int j1 = 0; j1 < par3; ++j1)
025            {
026                this.initChunkSeed((long)(j1 + par1), (long)(i1 + par2));
027                int k1 = aint[j1 + 1 + (i1 + 1) * (par3 + 2)];
028
029                if ((k1 != BiomeGenBase.swampland.biomeID || this.nextInt(6) != 0) && (k1 != BiomeGenBase.jungle.biomeID && k1 != BiomeGenBase.jungleHills.biomeID || this.nextInt(8) != 0))
030                {
031                    aint1[j1 + i1 * par3] = k1;
032                }
033                else
034                {
035                    aint1[j1 + i1 * par3] = BiomeGenBase.river.biomeID;
036                }
037            }
038        }
039
040        return aint1;
041    }
042}