001    package net.minecraft.world.gen.layer;
002    
003    import net.minecraft.world.biome.BiomeGenBase;
004    
005    public class GenLayerAddIsland extends GenLayer
006    {
007        public GenLayerAddIsland(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 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 + 0) * var7];
031                    int var14 = var9[var12 + 2 + (var11 + 0) * var7];
032                    int var15 = var9[var12 + 0 + (var11 + 2) * var7];
033                    int var16 = var9[var12 + 2 + (var11 + 2) * var7];
034                    int var17 = var9[var12 + 1 + (var11 + 1) * var7];
035                    this.initChunkSeed((long)(var12 + par1), (long)(var11 + par2));
036    
037                    if (var17 == 0 && (var13 != 0 || var14 != 0 || var15 != 0 || var16 != 0))
038                    {
039                        int var18 = 1;
040                        int var19 = 1;
041    
042                        if (var13 != 0 && this.nextInt(var18++) == 0)
043                        {
044                            var19 = var13;
045                        }
046    
047                        if (var14 != 0 && this.nextInt(var18++) == 0)
048                        {
049                            var19 = var14;
050                        }
051    
052                        if (var15 != 0 && this.nextInt(var18++) == 0)
053                        {
054                            var19 = var15;
055                        }
056    
057                        if (var16 != 0 && this.nextInt(var18++) == 0)
058                        {
059                            var19 = var16;
060                        }
061    
062                        if (this.nextInt(3) == 0)
063                        {
064                            var10[var12 + var11 * par3] = var19;
065                        }
066                        else if (var19 == BiomeGenBase.icePlains.biomeID)
067                        {
068                            var10[var12 + var11 * par3] = BiomeGenBase.frozenOcean.biomeID;
069                        }
070                        else
071                        {
072                            var10[var12 + var11 * par3] = 0;
073                        }
074                    }
075                    else if (var17 > 0 && (var13 == 0 || var14 == 0 || var15 == 0 || var16 == 0))
076                    {
077                        if (this.nextInt(5) == 0)
078                        {
079                            if (var17 == BiomeGenBase.icePlains.biomeID)
080                            {
081                                var10[var12 + var11 * par3] = BiomeGenBase.frozenOcean.biomeID;
082                            }
083                            else
084                            {
085                                var10[var12 + var11 * par3] = 0;
086                            }
087                        }
088                        else
089                        {
090                            var10[var12 + var11 * par3] = var17;
091                        }
092                    }
093                    else
094                    {
095                        var10[var12 + var11 * par3] = var17;
096                    }
097                }
098            }
099    
100            return var10;
101        }
102    }