001package net.minecraft.world.gen.layer;
002
003import net.minecraft.world.biome.BiomeGenBase;
004
005public class GenLayerRiver extends GenLayer
006{
007    public GenLayerRiver(long par1, GenLayer par3GenLayer)
008    {
009        super(par1);
010        super.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 var5 = par1 - 1;
020        int var6 = par2 - 1;
021        int var7 = par3 + 2;
022        int var8 = par4 + 2;
023        int[] var9 = this.parent.getInts(var5, var6, var7, var8);
024        int[] var10 = IntCache.getIntCache(par3 * par4);
025
026        for (int var11 = 0; var11 < par4; ++var11)
027        {
028            for (int var12 = 0; var12 < par3; ++var12)
029            {
030                int var13 = var9[var12 + 0 + (var11 + 1) * var7];
031                int var14 = var9[var12 + 2 + (var11 + 1) * var7];
032                int var15 = var9[var12 + 1 + (var11 + 0) * var7];
033                int var16 = var9[var12 + 1 + (var11 + 2) * var7];
034                int var17 = var9[var12 + 1 + (var11 + 1) * var7];
035
036                if (var17 != 0 && var13 != 0 && var14 != 0 && var15 != 0 && var16 != 0 && var17 == var13 && var17 == var15 && var17 == var14 && var17 == var16)
037                {
038                    var10[var12 + var11 * par3] = -1;
039                }
040                else
041                {
042                    var10[var12 + var11 * par3] = BiomeGenBase.river.biomeID;
043                }
044            }
045        }
046
047        return var10;
048    }
049}