    001    package net.minecraft.world.gen.layer;
    002
    003    import net.minecraft.world.biome.BiomeGenBase;
    004
    005    public 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    }