content: package net.minecraft.world.gen.feature;
  
  import net.minecraft.block.*;
  import net.minecraft.block.material.Material;
  import net.minecraft.block.state.IBlockState;
  import net.minecraft.init.Blocks;
  import net.minecraft.util.BlockPos;
  import net.minecraft.util.EnumFacing;
  import net.minecraft.world.World;
  
  import java.util.Random;
  
  public class WorldGenCanopyTree extends WorldGenAbstractTree {
      private static final IBlockState field_181640_a = Blocks.log2.getDefaultState().withProperty(BlockNewLog.VARIANT, BlockPlanks.EnumType.DARK_OAK);
      private static final IBlockState field_181641_b = Blocks.leaves2.getDefaultState().withProperty(BlockNewLeaf.VARIANT, BlockPlanks.EnumType.DARK_OAK).withProperty(BlockLeaves.CHECK_DECAY, false);
  
      public WorldGenCanopyTree(boolean p_i45461_1_) {
          super(p_i45461_1_);
      }
  
      public boolean generate(World worldIn, Random rand, BlockPos position) {
          int i = rand.nextInt(3) + rand.nextInt(2) + 6;
          int j = position.getX();
          int k = position.getY();
          int l = position.getZ();
  
          if (k >= 1 && k + i + 1 < 256) {
              BlockPos blockpos = position.down();
              Block block = worldIn.getBlockState(blockpos).getBlock();
  
              if (block != Blocks.grass && block != Blocks.dirt) {
                  return false;
              } else if (!this.func_181638_a(worldIn, position, i)) {
                  return false;
              } else {
                  this.func_175921_a(worldIn, blockpos);
                  this.func_175921_a(worldIn, blockpos.east());
                  this.func_175921_a(worldIn, blockpos.south());
                  this.func_175921_a(worldIn, blockpos.south().east());
                  EnumFacing enumfacing = EnumFacing.Plane.HORIZONTAL.random(rand);
                  int i1 = i - rand.nextInt(4);
                  int j1 = 2 - rand.nextInt(3);
                  int k1 = j;
                  int l1 = l;
                  int i2 = k + i - 1;
  
                  for (int j2 = 0; j2 < i; ++j2) {
                      if (j2 >= i1 && j1 > 0) {
                          k1 += enumfacing.getFrontOffsetX();
                          l1 += enumfacing.getFrontOffsetZ();
                          --j1;
                      }
  
                      int k2 = k + j2;
                      BlockPos blockpos1 = new BlockPos(k1, k2, l1);
                      Material material = worldIn.getBlockState(blockpos1).getBlock().getMaterial();
  
                      if (material == Material.air || material == Material.leaves) {
                          this.func_181639_b(worldIn, blockpos1);
                          this.func_181639_b(worldIn, blockpos1.east());
                          this.func_181639_b(worldIn, blockpos1.south());
                          this.func_181639_b(worldIn, blockpos1.east().south());
                      }
                  }
  
                  for (int i3 = -2; i3 <= 0; ++i3) {
                      for (int l3 = -2; l3 <= 0; ++l3) {
                          int k4 = -1;
                          this.func_150526_a(worldIn, k1 + i3, i2 + k4, l1 + l3);
                          this.func_150526_a(worldIn, 1 + k1 - i3, i2 + k4, l1 + l3);
                          this.func_150526_a(worldIn, k1 + i3, i2 + k4, 1 + l1 - l3);
                          this.func_150526_a(worldIn, 1 + k1 - i3, i2 + k4, 1 + l1 - l3);
  
                          if ((i3 > -2 || l3 > -1) && (i3 != -1 || l3 != -2)) {
                              k4 = 1;
                              this.func_150526_a(worldIn, k1 + i3, i2 + k4, l1 + l3);
                              this.func_150526_a(worldIn, 1 + k1 - i3, i2 + k4, l1 + l3);
                              this.func_150526_a(worldIn, k1 + i3, i2 + k4, 1 + l1 - l3);
                              this.func_150526_a(worldIn, 1 + k1 - i3, i2 + k4, 1 + l1 - l3);
                          }
                      }
                  }
  
                  if (rand.nextBoolean()) {
                      this.func_150526_a(worldIn, k1, i2 + 2, l1);
                      this.func_150526_a(worldIn, k1 + 1, i2 + 2, l1);
                      this.func_150526_a(worldIn, k1 + 1, i2 + 2, l1 + 1);
                      this.func_150526_a(worldIn, k1, i2 + 2, l1 + 1);
                  }
  
                  for (int j3 = -3; j3 <= 4; ++j3) {
                      for (int i4 = -3; i4 <= 4; ++i4) {
                          if ((j3 != -3 || i4 != -3) && (j3 != -3 || i4 != 4) && (j3 != 4 || i4 != -3) && (j3 != 4 || i4 != 4) && (Math.abs(j3) < 3 || Math.abs(i4) < 3)) {
                              this.func_150526_a(worldIn, k1 + j3, i2, l1 + i4);
                          }
                      }
                  }
  
                  for (int k3 = -1; k3 <= 2; ++k3) {
                      for (int j4 = -1; j4 <= 2; ++j4) {
                          if ((k3 < 0 || k3 > 1 || j4 < 0 || j4 > 1) && rand.nextInt(3) <= 0) {
                              int l4 = rand.nextInt(3) + 2;
  
                              for (int i5 = 0; i5 < l4; ++i5) {
                                  this.func_181639_b(worldIn, new BlockPos(j + k3, i2 - i5 - 1, l + j4));
                              }
  
                              for (int j5 = -1; j5 <= 1; ++j5) {
                                  for (int l2 = -1; l2 <= 1; ++l2) {
                                      this.func_150526_a(worldIn, k1 + k3 + j5, i2, l1 + j4 + l2);
                                  }
                              }
  
                              for (int k5 = -2; k5 <= 2; ++k5) {
                                  for (int l5 = -2; l5 <= 2; ++l5) {
                                      if (Math.abs(k5) != 2 || Math.abs(l5) != 2) {
                                          this.func_150526_a(worldIn, k1 + k3 + k5, i2 - 1, l1 + j4 + l5);
                                      }
                                  }
                              }
                          }
                      }
                  }
  
                  return true;
              }
          } else {
              return false;
          }
      }
  
      private boolean func_181638_a(World p_181638_1_, BlockPos p_181638_2_, int p_181638_3_) {
          int i = p_181638_2_.getX();
          int j = p_181638_2_.getY();
          int k = p_181638_2_.getZ();
          BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();
  
          for (int l = 0; l <= p_181638_3_ + 1; ++l) {
              int i1 = 1;
  
              if (l == 0) {
                  i1 = 0;
              }
  
              if (l >= p_181638_3_ - 1) {
                  i1 = 2;
              }
  
              for (int j1 = -i1; j1 <= i1; ++j1) {
                  for (int k1 = -i1; k1 <= i1; ++k1) {
                      if (!this.func_150523_a(p_181638_1_.getBlockState(blockpos$mutableblockpos.set(i + j1, j + l, k + k1)).getBlock())) {
                          return false;
                      }
                  }
              }
          }
  
          return true;
      }
  
      private void func_181639_b(World p_181639_1_, BlockPos p_181639_2_) {
          if (this.func_150523_a(p_181639_1_.getBlockState(p_181639_2_).getBlock())) {
              this.setBlockAndNotifyAdequately(p_181639_1_, p_181639_2_, field_181640_a);
          }
      }
  
      private void func_150526_a(World worldIn, int p_150526_2_, int p_150526_3_, int p_150526_4_) {
          BlockPos blockpos = new BlockPos(p_150526_2_, p_150526_3_, p_150526_4_);
          Block block = worldIn.getBlockState(blockpos).getBlock();
  
          if (block.getMaterial() == Material.air) {
              this.setBlockAndNotifyAdequately(worldIn, blockpos, field_181641_b);
          }
      }
  }
  