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