    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}