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