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.cocoa.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 }