001 package net.minecraft.world.gen.feature;
002
003 import java.util.Random;
004 import net.minecraft.block.Block;
005 import net.minecraft.util.Direction;
006 import net.minecraft.world.World;
007
008 public 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 }