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