001package net.minecraft.world.gen.feature; 002 003import java.util.Random; 004import net.minecraft.block.Block; 005import net.minecraft.block.BlockSapling; 006import net.minecraft.util.Direction; 007import net.minecraft.world.World; 008import net.minecraftforge.common.ForgeDirection; 009 010public class WorldGenTrees extends WorldGenerator 011{ 012 /** The minimum height of a generated tree. */ 013 private final int minTreeHeight; 014 015 /** True if this tree should grow Vines. */ 016 private final boolean vinesGrow; 017 018 /** The metadata value of the wood to use in tree generation. */ 019 private final int metaWood; 020 021 /** The metadata value of the leaves to use in tree generation. */ 022 private final int metaLeaves; 023 024 public WorldGenTrees(boolean par1) 025 { 026 this(par1, 4, 0, 0, false); 027 } 028 029 public WorldGenTrees(boolean par1, int par2, int par3, int par4, boolean par5) 030 { 031 super(par1); 032 this.minTreeHeight = par2; 033 this.metaWood = par3; 034 this.metaLeaves = par4; 035 this.vinesGrow = par5; 036 } 037 038 public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5) 039 { 040 int l = par2Random.nextInt(3) + this.minTreeHeight; 041 boolean flag = true; 042 043 if (par4 >= 1 && par4 + l + 1 <= 256) 044 { 045 int i1; 046 byte b0; 047 int j1; 048 int k1; 049 050 for (i1 = par4; i1 <= par4 + 1 + l; ++i1) 051 { 052 b0 = 1; 053 054 if (i1 == par4) 055 { 056 b0 = 0; 057 } 058 059 if (i1 >= par4 + 1 + l - 2) 060 { 061 b0 = 2; 062 } 063 064 for (int l1 = par3 - b0; l1 <= par3 + b0 && flag; ++l1) 065 { 066 for (j1 = par5 - b0; j1 <= par5 + b0 && flag; ++j1) 067 { 068 if (i1 >= 0 && i1 < 256) 069 { 070 k1 = par1World.getBlockId(l1, i1, j1); 071 072 Block block = Block.blocksList[k1]; 073 074 if (k1 != 0 && 075 !block.isLeaves(par1World, l1, i1, j1) && 076 k1 != Block.grass.blockID && 077 k1 != Block.dirt.blockID && 078 !block.isWood(par1World, l1, i1, j1)) 079 { 080 flag = false; 081 } 082 } 083 else 084 { 085 flag = false; 086 } 087 } 088 } 089 } 090 091 if (!flag) 092 { 093 return false; 094 } 095 else 096 { 097 i1 = par1World.getBlockId(par3, par4 - 1, par5); 098 Block soil = Block.blocksList[i1]; 099 boolean isSoil = (soil != null && soil.canSustainPlant(par1World, par3, par4 - 1, par5, ForgeDirection.UP, (BlockSapling)Block.sapling)); 100 101 if (isSoil && par4 < 256 - l - 1) 102 { 103 soil.onPlantGrow(par1World, par3, par4 - 1, par5, par3, par4, par5); 104 b0 = 3; 105 byte b1 = 0; 106 int i2; 107 int j2; 108 int k2; 109 110 for (j1 = par4 - b0 + l; j1 <= par4 + l; ++j1) 111 { 112 k1 = j1 - (par4 + l); 113 i2 = b1 + 1 - k1 / 2; 114 115 for (j2 = par3 - i2; j2 <= par3 + i2; ++j2) 116 { 117 k2 = j2 - par3; 118 119 for (int l2 = par5 - i2; l2 <= par5 + i2; ++l2) 120 { 121 int i3 = l2 - par5; 122 123 if (Math.abs(k2) != i2 || Math.abs(i3) != i2 || par2Random.nextInt(2) != 0 && k1 != 0) 124 { 125 int j3 = par1World.getBlockId(j2, j1, l2); 126 Block block = Block.blocksList[j3]; 127 128 if (block == null || block.canBeReplacedByLeaves(par1World, j2, j1, l2)) 129 { 130 this.setBlockAndMetadata(par1World, j2, j1, l2, Block.leaves.blockID, this.metaLeaves); 131 } 132 } 133 } 134 } 135 } 136 137 for (j1 = 0; j1 < l; ++j1) 138 { 139 k1 = par1World.getBlockId(par3, par4 + j1, par5); 140 141 Block block = Block.blocksList[k1]; 142 143 if (k1 == 0 || block == null || block.isLeaves(par1World, par3, par4 + j1, par5)) 144 { 145 this.setBlockAndMetadata(par1World, par3, par4 + j1, par5, Block.wood.blockID, this.metaWood); 146 147 if (this.vinesGrow && j1 > 0) 148 { 149 if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3 - 1, par4 + j1, par5)) 150 { 151 this.setBlockAndMetadata(par1World, par3 - 1, par4 + j1, par5, Block.vine.blockID, 8); 152 } 153 154 if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3 + 1, par4 + j1, par5)) 155 { 156 this.setBlockAndMetadata(par1World, par3 + 1, par4 + j1, par5, Block.vine.blockID, 2); 157 } 158 159 if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3, par4 + j1, par5 - 1)) 160 { 161 this.setBlockAndMetadata(par1World, par3, par4 + j1, par5 - 1, Block.vine.blockID, 1); 162 } 163 164 if (par2Random.nextInt(3) > 0 && par1World.isAirBlock(par3, par4 + j1, par5 + 1)) 165 { 166 this.setBlockAndMetadata(par1World, par3, par4 + j1, par5 + 1, Block.vine.blockID, 4); 167 } 168 } 169 } 170 } 171 172 if (this.vinesGrow) 173 { 174 for (j1 = par4 - 3 + l; j1 <= par4 + l; ++j1) 175 { 176 k1 = j1 - (par4 + l); 177 i2 = 2 - k1 / 2; 178 179 for (j2 = par3 - i2; j2 <= par3 + i2; ++j2) 180 { 181 for (k2 = par5 - i2; k2 <= par5 + i2; ++k2) 182 { 183 Block block = Block.blocksList[par1World.getBlockId(j2, j1, k2)]; 184 if (block != null && block.isLeaves(par1World, j2, j1, k2)) 185 { 186 if (par2Random.nextInt(4) == 0 && par1World.getBlockId(j2 - 1, j1, k2) == 0) 187 { 188 this.growVines(par1World, j2 - 1, j1, k2, 8); 189 } 190 191 if (par2Random.nextInt(4) == 0 && par1World.getBlockId(j2 + 1, j1, k2) == 0) 192 { 193 this.growVines(par1World, j2 + 1, j1, k2, 2); 194 } 195 196 if (par2Random.nextInt(4) == 0 && par1World.getBlockId(j2, j1, k2 - 1) == 0) 197 { 198 this.growVines(par1World, j2, j1, k2 - 1, 1); 199 } 200 201 if (par2Random.nextInt(4) == 0 && par1World.getBlockId(j2, j1, k2 + 1) == 0) 202 { 203 this.growVines(par1World, j2, j1, k2 + 1, 4); 204 } 205 } 206 } 207 } 208 } 209 210 if (par2Random.nextInt(5) == 0 && l > 5) 211 { 212 for (j1 = 0; j1 < 2; ++j1) 213 { 214 for (k1 = 0; k1 < 4; ++k1) 215 { 216 if (par2Random.nextInt(4 - j1) == 0) 217 { 218 i2 = par2Random.nextInt(3); 219 this.setBlockAndMetadata(par1World, par3 + Direction.offsetX[Direction.rotateOpposite[k1]], par4 + l - 5 + j1, par5 + Direction.offsetZ[Direction.rotateOpposite[k1]], Block.cocoaPlant.blockID, i2 << 2 | k1); 220 } 221 } 222 } 223 } 224 } 225 226 return true; 227 } 228 else 229 { 230 return false; 231 } 232 } 233 } 234 else 235 { 236 return false; 237 } 238 } 239 240 /** 241 * Grows vines downward from the given block for a given length. Args: World, x, starty, z, vine-length 242 */ 243 private void growVines(World par1World, int par2, int par3, int par4, int par5) 244 { 245 this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5); 246 int i1 = 4; 247 248 while (true) 249 { 250 --par3; 251 252 if (par1World.getBlockId(par2, par3, par4) != 0 || i1 <= 0) 253 { 254 return; 255 } 256 257 this.setBlockAndMetadata(par1World, par2, par3, par4, Block.vine.blockID, par5); 258 --i1; 259 } 260 } 261}