001    package net.minecraft.src;
002    
003    import java.util.Random;
004    
005    public class WorldGenSwamp extends WorldGenerator
006    {
007        public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
008        {
009            int var6;
010    
011            for (var6 = par2Random.nextInt(4) + 5; par1World.getBlockMaterial(par3, par4 - 1, par5) == Material.water; --par4)
012            {
013                ;
014            }
015    
016            boolean var7 = true;
017    
018            if (par4 >= 1 && par4 + var6 + 1 <= 128)
019            {
020                int var8;
021                int var10;
022                int var11;
023                int var12;
024    
025                for (var8 = par4; var8 <= par4 + 1 + var6; ++var8)
026                {
027                    byte var9 = 1;
028    
029                    if (var8 == par4)
030                    {
031                        var9 = 0;
032                    }
033    
034                    if (var8 >= par4 + 1 + var6 - 2)
035                    {
036                        var9 = 3;
037                    }
038    
039                    for (var10 = par3 - var9; var10 <= par3 + var9 && var7; ++var10)
040                    {
041                        for (var11 = par5 - var9; var11 <= par5 + var9 && var7; ++var11)
042                        {
043                            if (var8 >= 0 && var8 < 128)
044                            {
045                                var12 = par1World.getBlockId(var10, var8, var11);
046    
047                                if (var12 != 0 && (Block.blocksList[var12] != null && !Block.blocksList[var12].isLeaves(par1World, var10, var8, var11)))
048                                {
049                                    if (var12 != Block.waterStill.blockID && var12 != Block.waterMoving.blockID)
050                                    {
051                                        var7 = false;
052                                    }
053                                    else if (var8 > par4)
054                                    {
055                                        var7 = false;
056                                    }
057                                }
058                            }
059                            else
060                            {
061                                var7 = false;
062                            }
063                        }
064                    }
065                }
066    
067                if (!var7)
068                {
069                    return false;
070                }
071                else
072                {
073                    var8 = par1World.getBlockId(par3, par4 - 1, par5);
074    
075                    if ((var8 == Block.grass.blockID || var8 == Block.dirt.blockID) && par4 < 128 - var6 - 1)
076                    {
077                        this.setBlock(par1World, par3, par4 - 1, par5, Block.dirt.blockID);
078                        int var13;
079                        int var16;
080    
081                        for (var16 = par4 - 3 + var6; var16 <= par4 + var6; ++var16)
082                        {
083                            var10 = var16 - (par4 + var6);
084                            var11 = 2 - var10 / 2;
085    
086                            for (var12 = par3 - var11; var12 <= par3 + var11; ++var12)
087                            {
088                                var13 = var12 - par3;
089    
090                                for (int var14 = par5 - var11; var14 <= par5 + var11; ++var14)
091                                {
092                                    int var15 = var14 - par5;
093    
094                                    Block block = Block.blocksList[par1World.getBlockId(var12, var16, var14)];
095    
096                                    if ((Math.abs(var13) != var11 || Math.abs(var15) != var11 || par2Random.nextInt(2) != 0 && var10 != 0) && 
097                                        (block == null || block.canBeReplacedByLeaves(par1World, var12, var16, var14)))
098                                    {
099                                        this.setBlock(par1World, var12, var16, var14, Block.leaves.blockID);
100                                    }
101                                }
102                            }
103                        }
104    
105                        for (var16 = 0; var16 < var6; ++var16)
106                        {
107                            var10 = par1World.getBlockId(par3, par4 + var16, par5);
108    
109                            Block block = Block.blocksList[var10];
110    
111                            if (var10 == 0 || (block != null && block.isLeaves(par1World, par3, par4 + var16, par5)) || var10 == Block.waterMoving.blockID || var10 == Block.waterStill.blockID)
112                            {
113                                this.setBlock(par1World, par3, par4 + var16, par5, Block.wood.blockID);
114                            }
115                        }
116    
117                        for (var16 = par4 - 3 + var6; var16 <= par4 + var6; ++var16)
118                        {
119                            var10 = var16 - (par4 + var6);
120                            var11 = 2 - var10 / 2;
121    
122                            for (var12 = par3 - var11; var12 <= par3 + var11; ++var12)
123                            {
124                                for (var13 = par5 - var11; var13 <= par5 + var11; ++var13)
125                                {
126                                    Block block = Block.blocksList[par1World.getBlockId(var12, var16, var13)];
127                                    if (block != null && block.isLeaves(par1World, var12, var16, var13))
128                                    {
129                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var12 - 1, var16, var13) == 0)
130                                        {
131                                            this.generateVines(par1World, var12 - 1, var16, var13, 8);
132                                        }
133    
134                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var12 + 1, var16, var13) == 0)
135                                        {
136                                            this.generateVines(par1World, var12 + 1, var16, var13, 2);
137                                        }
138    
139                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var12, var16, var13 - 1) == 0)
140                                        {
141                                            this.generateVines(par1World, var12, var16, var13 - 1, 1);
142                                        }
143    
144                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var12, var16, var13 + 1) == 0)
145                                        {
146                                            this.generateVines(par1World, var12, var16, var13 + 1, 4);
147                                        }
148                                    }
149                                }
150                            }
151                        }
152    
153                        return true;
154                    }
155                    else
156                    {
157                        return false;
158                    }
159                }
160            }
161            else
162            {
163                return false;
164            }
165        }
166    
167        /**
168         * Generates vines at the given position until it hits a block.
169         */
170        private void generateVines(World par1World, int par2, int par3, int par4, int par5)
171        {
172            this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5);
173            int var6 = 4;
174    
175            while (true)
176            {
177                --par3;
178    
179                if (par1World.getBlockId(par2, par3, par4) != 0 || var6 <= 0)
180                {
181                    return;
182                }
183    
184                this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5);
185                --var6;
186            }
187        }
188    }