001    package net.minecraft.world.gen.feature;
002    
003    import java.util.Random;
004    import net.minecraft.block.Block;
005    import net.minecraft.world.World;
006    
007    public class WorldGenForest extends WorldGenerator
008    {
009        public WorldGenForest(boolean par1)
010        {
011            super(par1);
012        }
013    
014        public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
015        {
016            int var6 = par2Random.nextInt(3) + 5;
017            boolean var7 = true;
018    
019            if (par4 >= 1 && par4 + var6 + 1 <= 256)
020            {
021                int var8;
022                int var10;
023                int var11;
024                int var12;
025    
026                for (var8 = par4; var8 <= par4 + 1 + var6; ++var8)
027                {
028                    byte var9 = 1;
029    
030                    if (var8 == par4)
031                    {
032                        var9 = 0;
033                    }
034    
035                    if (var8 >= par4 + 1 + var6 - 2)
036                    {
037                        var9 = 2;
038                    }
039    
040                    for (var10 = par3 - var9; var10 <= par3 + var9 && var7; ++var10)
041                    {
042                        for (var11 = par5 - var9; var11 <= par5 + var9 && var7; ++var11)
043                        {
044                            if (var8 >= 0 && var8 < 256)
045                            {
046                                var12 = par1World.getBlockId(var10, var8, var11);
047    
048                                Block block = Block.blocksList[var12];
049    
050                                if (var12 != 0 && (block != null && !block.isLeaves(par1World, var10,  var8, var11)))
051                                {
052                                    var7 = false;
053                                }
054                            }
055                            else
056                            {
057                                var7 = false;
058                            }
059                        }
060                    }
061                }
062    
063                if (!var7)
064                {
065                    return false;
066                }
067                else
068                {
069                    var8 = par1World.getBlockId(par3, par4 - 1, par5);
070    
071                    if ((var8 == Block.grass.blockID || var8 == Block.dirt.blockID) && par4 < 256 - var6 - 1)
072                    {
073                        this.setBlock(par1World, par3, par4 - 1, par5, Block.dirt.blockID);
074                        int var16;
075    
076                        for (var16 = par4 - 3 + var6; var16 <= par4 + var6; ++var16)
077                        {
078                            var10 = var16 - (par4 + var6);
079                            var11 = 1 - var10 / 2;
080    
081                            for (var12 = par3 - var11; var12 <= par3 + var11; ++var12)
082                            {
083                                int var13 = var12 - par3;
084    
085                                for (int var14 = par5 - var11; var14 <= par5 + var11; ++var14)
086                                {
087                                    int var15 = var14 - par5;
088    
089                                    Block block = Block.blocksList[par1World.getBlockId(var12, var16, var14)];
090                                    
091                                    if ((Math.abs(var13) != var11 || Math.abs(var15) != var11 || par2Random.nextInt(2) != 0 && var10 != 0) && 
092                                        (block == null || block.canBeReplacedByLeaves(par1World, var12, var16, var14)))
093                                    {
094                                        this.setBlockAndMetadata(par1World, var12, var16, var14, Block.leaves.blockID, 2);
095                                    }
096                                }
097                            }
098                        }
099    
100                        for (var16 = 0; var16 < var6; ++var16)
101                        {
102                            var10 = par1World.getBlockId(par3, par4 + var16, par5);
103    
104                            Block block = Block.blocksList[var10];
105    
106                            if (var10 == 0 || block == null || block.isLeaves(par1World, par3, par4 + var16, par5))
107                            {
108                                this.setBlockAndMetadata(par1World, par3, par4 + var16, par5, Block.wood.blockID, 2);
109                            }
110                        }
111    
112                        return true;
113                    }
114                    else
115                    {
116                        return false;
117                    }
118                }
119            }
120            else
121            {
122                return false;
123            }
124        }
125    }