001package net.minecraft.world.gen.feature;
002
003import java.util.Random;
004import net.minecraft.block.Block;
005import net.minecraft.util.Direction;
006import net.minecraft.world.World;
007
008public class WorldGenTrees extends WorldGenerator
009{
010    /** The minimum height of a generated tree. */
011    private final int minTreeHeight;
012
013    /** True if this tree should grow Vines. */
014    private final boolean vinesGrow;
015
016    /** The metadata value of the wood to use in tree generation. */
017    private final int metaWood;
018
019    /** The metadata value of the leaves to use in tree generation. */
020    private final int metaLeaves;
021
022    public WorldGenTrees(boolean par1)
023    {
024        this(par1, 4, 0, 0, false);
025    }
026
027    public WorldGenTrees(boolean par1, int par2, int par3, int par4, boolean par5)
028    {
029        super(par1);
030        this.minTreeHeight = par2;
031        this.metaWood = par3;
032        this.metaLeaves = par4;
033        this.vinesGrow = par5;
034    }
035
036    public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
037    {
038        int var6 = par2Random.nextInt(3) + this.minTreeHeight;
039        boolean var7 = true;
040
041        if (par4 >= 1 && par4 + var6 + 1 <= 256)
042        {
043            int var8;
044            byte var9;
045            int var11;
046            int var12;
047
048            for (var8 = par4; var8 <= par4 + 1 + var6; ++var8)
049            {
050                var9 = 1;
051
052                if (var8 == par4)
053                {
054                    var9 = 0;
055                }
056
057                if (var8 >= par4 + 1 + var6 - 2)
058                {
059                    var9 = 2;
060                }
061
062                for (int var10 = par3 - var9; var10 <= par3 + var9 && var7; ++var10)
063                {
064                    for (var11 = par5 - var9; var11 <= par5 + var9 && var7; ++var11)
065                    {
066                        if (var8 >= 0 && var8 < 256)
067                        {
068                            var12 = par1World.getBlockId(var10, var8, var11);
069
070                            Block block = Block.blocksList[var12];
071
072                            if (var12 != 0 &&
073                               !block.isLeaves(par1World, var10, var8, var11) &&
074                                var12 != Block.grass.blockID &&
075                                var12 != Block.dirt.blockID &&
076                               !block.isWood(par1World, var10, var8, var11))
077                            {
078                                var7 = false;
079                            }
080                        }
081                        else
082                        {
083                            var7 = false;
084                        }
085                    }
086                }
087            }
088
089            if (!var7)
090            {
091                return false;
092            }
093            else
094            {
095                var8 = par1World.getBlockId(par3, par4 - 1, par5);
096
097                if ((var8 == Block.grass.blockID || var8 == Block.dirt.blockID) && par4 < 256 - var6 - 1)
098                {
099                    this.setBlock(par1World, par3, par4 - 1, par5, Block.dirt.blockID);
100                    var9 = 3;
101                    byte var18 = 0;
102                    int var13;
103                    int var14;
104                    int var15;
105
106                    for (var11 = par4 - var9 + var6; var11 <= par4 + var6; ++var11)
107                    {
108                        var12 = var11 - (par4 + var6);
109                        var13 = var18 + 1 - var12 / 2;
110
111                        for (var14 = par3 - var13; var14 <= par3 + var13; ++var14)
112                        {
113                            var15 = var14 - par3;
114
115                            for (int var16 = par5 - var13; var16 <= par5 + var13; ++var16)
116                            {
117                                int var17 = var16 - par5;
118
119                                Block block = Block.blocksList[par1World.getBlockId(var14, var11, var16)];
120
121                                if ((Math.abs(var15) != var13 || Math.abs(var17) != var13 || par2Random.nextInt(2) != 0 && var12 != 0) &&
122                                    (block == null || block.canBeReplacedByLeaves(par1World, var14, var11, var16)))
123                                {
124                                    this.setBlockAndMetadata(par1World, var14, var11, var16, Block.leaves.blockID, this.metaLeaves);
125                                }
126                            }
127                        }
128                    }
129
130                    for (var11 = 0; var11 < var6; ++var11)
131                    {
132                        var12 = par1World.getBlockId(par3, par4 + var11, par5);
133
134                        Block block = Block.blocksList[var12];
135
136                        if (var12 == 0 || block == null || block.isLeaves(par1World, par3, par4 + var11, par5))
137                        {
138                            this.setBlockAndMetadata(par1World, par3, par4 + var11, par5, Block.wood.blockID, this.metaWood);
139
140                            if (this.vinesGrow && var11 > 0)
141                            {
142                                if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3 - 1, par4 + var11, par5))
143                                {
144                                    this.setBlockAndMetadata(par1World, par3 - 1, par4 + var11, par5, Block.vine.blockID, 8);
145                                }
146
147                                if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3 + 1, par4 + var11, par5))
148                                {
149                                    this.setBlockAndMetadata(par1World, par3 + 1, par4 + var11, par5, Block.vine.blockID, 2);
150                                }
151
152                                if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3, par4 + var11, par5 - 1))
153                                {
154                                    this.setBlockAndMetadata(par1World, par3, par4 + var11, par5 - 1, Block.vine.blockID, 1);
155                                }
156
157                                if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3, par4 + var11, par5 + 1))
158                                {
159                                    this.setBlockAndMetadata(par1World, par3, par4 + var11, par5 + 1, Block.vine.blockID, 4);
160                                }
161                            }
162                        }
163                    }
164
165                    if (this.vinesGrow)
166                    {
167                        for (var11 = par4 - 3 + var6; var11 <= par4 + var6; ++var11)
168                        {
169                            var12 = var11 - (par4 + var6);
170                            var13 = 2 - var12 / 2;
171
172                            for (var14 = par3 - var13; var14 <= par3 + var13; ++var14)
173                            {
174                                for (var15 = par5 - var13; var15 <= par5 + var13; ++var15)
175                                {
176                                    Block block = Block.blocksList[par1World.getBlockId(var14, var11, var15)];
177                                    if (block != null && block.isLeaves(par1World, var14, var11, var15))
178                                    {
179                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var14 - 1, var11, var15) == 0)
180                                        {
181                                            this.growVines(par1World, var14 - 1, var11, var15, 8);
182                                        }
183
184                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var14 + 1, var11, var15) == 0)
185                                        {
186                                            this.growVines(par1World, var14 + 1, var11, var15, 2);
187                                        }
188
189                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var14, var11, var15 - 1) == 0)
190                                        {
191                                            this.growVines(par1World, var14, var11, var15 - 1, 1);
192                                        }
193
194                                        if (par2Random.nextInt(4) == 0 && par1World.getBlockId(var14, var11, var15 + 1) == 0)
195                                        {
196                                            this.growVines(par1World, var14, var11, var15 + 1, 4);
197                                        }
198                                    }
199                                }
200                            }
201                        }
202
203                        if (par2Random.nextInt(5) == 0 && var6 > 5)
204                        {
205                            for (var11 = 0; var11 < 2; ++var11)
206                            {
207                                for (var12 = 0; var12 < 4; ++var12)
208                                {
209                                    if (par2Random.nextInt(4 - var11) == 0)
210                                    {
211                                        var13 = par2Random.nextInt(3);
212                                        this.setBlockAndMetadata(par1World, par3 + Direction.offsetX[Direction.footInvisibleFaceRemap[var12]], par4 + var6 - 5 + var11, par5 + Direction.offsetZ[Direction.footInvisibleFaceRemap[var12]], Block.cocoaPlant.blockID, var13 << 2 | var12);
213                                    }
214                                }
215                            }
216                        }
217                    }
218
219                    return true;
220                }
221                else
222                {
223                    return false;
224                }
225            }
226        }
227        else
228        {
229            return false;
230        }
231    }
232
233    /**
234     * Grows vines downward from the given block for a given length. Args: World, x, starty, z, vine-length
235     */
236    private void growVines(World par1World, int par2, int par3, int par4, int par5)
237    {
238        this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5);
239        int var6 = 4;
240
241        while (true)
242        {
243            --par3;
244
245            if (par1World.getBlockId(par2, par3, par4) != 0 || var6 <= 0)
246            {
247                return;
248            }
249
250            this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5);
251            --var6;
252        }
253    }
254}