001    package net.minecraft.src;
002    
003    public class GenLayerRiver extends GenLayer
004    {
005        public GenLayerRiver(long par1, GenLayer par3GenLayer)
006        {
007            super(par1);
008            super.parent = par3GenLayer;
009        }
010    
011        /**
012         * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
013         * amounts, or biomeList[] indices based on the particular GenLayer subclass.
014         */
015        public int[] getInts(int par1, int par2, int par3, int par4)
016        {
017            int var5 = par1 - 1;
018            int var6 = par2 - 1;
019            int var7 = par3 + 2;
020            int var8 = par4 + 2;
021            int[] var9 = this.parent.getInts(var5, var6, var7, var8);
022            int[] var10 = IntCache.getIntCache(par3 * par4);
023    
024            for (int var11 = 0; var11 < par4; ++var11)
025            {
026                for (int var12 = 0; var12 < par3; ++var12)
027                {
028                    int var13 = var9[var12 + 0 + (var11 + 1) * var7];
029                    int var14 = var9[var12 + 2 + (var11 + 1) * var7];
030                    int var15 = var9[var12 + 1 + (var11 + 0) * var7];
031                    int var16 = var9[var12 + 1 + (var11 + 2) * var7];
032                    int var17 = var9[var12 + 1 + (var11 + 1) * var7];
033    
034                    if (var17 != 0 && var13 != 0 && var14 != 0 && var15 != 0 && var16 != 0 && var17 == var13 && var17 == var15 && var17 == var14 && var17 == var16)
035                    {
036                        var10[var12 + var11 * par3] = -1;
037                    }
038                    else
039                    {
040                        var10[var12 + var11 * par3] = BiomeGenBase.river.biomeID;
041                    }
042                }
043            }
044    
045            return var10;
046        }
047    }