001package net.minecraft.world.gen.layer;
002
003import net.minecraft.world.biome.BiomeGenBase;
004
005public class GenLayerHills extends GenLayer
006{
007    public GenLayerHills(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[] aint = this.parent.getInts(par1 - 1, par2 - 1, par3 + 2, par4 + 2);
020        int[] aint1 = IntCache.getIntCache(par3 * par4);
021
022        for (int i1 = 0; i1 < par4; ++i1)
023        {
024            for (int j1 = 0; j1 < par3; ++j1)
025            {
026                this.initChunkSeed((long)(j1 + par1), (long)(i1 + par2));
027                int k1 = aint[j1 + 1 + (i1 + 1) * (par3 + 2)];
028
029                if (this.nextInt(3) == 0)
030                {
031                    int l1 = k1;
032
033                    if (k1 == BiomeGenBase.desert.biomeID)
034                    {
035                        l1 = BiomeGenBase.desertHills.biomeID;
036                    }
037                    else if (k1 == BiomeGenBase.forest.biomeID)
038                    {
039                        l1 = BiomeGenBase.forestHills.biomeID;
040                    }
041                    else if (k1 == BiomeGenBase.taiga.biomeID)
042                    {
043                        l1 = BiomeGenBase.taigaHills.biomeID;
044                    }
045                    else if (k1 == BiomeGenBase.plains.biomeID)
046                    {
047                        l1 = BiomeGenBase.forest.biomeID;
048                    }
049                    else if (k1 == BiomeGenBase.icePlains.biomeID)
050                    {
051                        l1 = BiomeGenBase.iceMountains.biomeID;
052                    }
053                    else if (k1 == BiomeGenBase.jungle.biomeID)
054                    {
055                        l1 = BiomeGenBase.jungleHills.biomeID;
056                    }
057
058                    if (l1 == k1)
059                    {
060                        aint1[j1 + i1 * par3] = k1;
061                    }
062                    else
063                    {
064                        int i2 = aint[j1 + 1 + (i1 + 1 - 1) * (par3 + 2)];
065                        int j2 = aint[j1 + 1 + 1 + (i1 + 1) * (par3 + 2)];
066                        int k2 = aint[j1 + 1 - 1 + (i1 + 1) * (par3 + 2)];
067                        int l2 = aint[j1 + 1 + (i1 + 1 + 1) * (par3 + 2)];
068
069                        if (i2 == k1 && j2 == k1 && k2 == k1 && l2 == k1)
070                        {
071                            aint1[j1 + i1 * par3] = l1;
072                        }
073                        else
074                        {
075                            aint1[j1 + i1 * par3] = k1;
076                        }
077                    }
078                }
079                else
080                {
081                    aint1[j1 + i1 * par3] = k1;
082                }
083            }
084        }
085
086        return aint1;
087    }
088}