    001    package net.minecraft.world.gen.layer;
    002
    003    import net.minecraft.world.WorldType;
    004    import net.minecraft.world.biome.BiomeGenBase;
    005
    006    public class GenLayerBiome extends GenLayer
    007    {
    008        /** this sets all the biomes that are allowed to appear in the overworld */
    009        private BiomeGenBase[] allowedBiomes;
    010
    011        public GenLayerBiome(long par1, GenLayer par3GenLayer, WorldType par4WorldType)
    012        {
    013            super(par1);
    014            this.allowedBiomes = par4WorldType.getBiomesForWorldType();
    015            this.parent = par3GenLayer;
    016        }
    017
    018        /**
    019         * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
    020         * amounts, or biomeList[] indices based on the particular GenLayer subclass.
    021         */
    022        public int[] getInts(int par1, int par2, int par3, int par4)
    023        {
    024            int[] var5 = this.parent.getInts(par1, par2, par3, par4);
    025            int[] var6 = IntCache.getIntCache(par3 * par4);
    026
    027            for (int var7 = 0; var7 < par4; ++var7)
    028            {
    029                for (int var8 = 0; var8 < par3; ++var8)
    030                {
    031                    this.initChunkSeed((long)(var8 + par1), (long)(var7 + par2));
    032                    int var9 = var5[var8 + var7 * par3];
    033
    034                    if (var9 == 0)
    035                    {
    036                        var6[var8 + var7 * par3] = 0;
    037                    }
    038                    else if (var9 == BiomeGenBase.mushroomIsland.biomeID)
    039                    {
    040                        var6[var8 + var7 * par3] = var9;
    041                    }
    042                    else if (var9 == 1)
    043                    {
    044                        var6[var8 + var7 * par3] = this.allowedBiomes[this.nextInt(this.allowedBiomes.length)].biomeID;
    045                    }
    046                    else
    047                    {
    048                        int var10 = this.allowedBiomes[this.nextInt(this.allowedBiomes.length)].biomeID;
    049
    050                        if (var10 == BiomeGenBase.taiga.biomeID)
    051                        {
    052                            var6[var8 + var7 * par3] = var10;
    053                        }
    054                        else
    055                        {
    056                            var6[var8 + var7 * par3] = BiomeGenBase.icePlains.biomeID;
    057                        }
    058                    }
    059                }
    060            }
    061
    062            return var6;
    063        }
    064    }