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 WorldGenSavannaTree extends WorldGenAbstractTree {
      private static final IBlockState field_181643_a = Blocks.log2.getDefaultState().withProperty(BlockNewLog.VARIANT, BlockPlanks.EnumType.ACACIA);
      private static final IBlockState field_181644_b = Blocks.leaves2.getDefaultState().withProperty(BlockNewLeaf.VARIANT, BlockPlanks.EnumType.ACACIA).withProperty(BlockLeaves.CHECK_DECAY, false);
  
      public WorldGenSavannaTree(boolean p_i45463_1_) {
          super(p_i45463_1_);
      }
  
      public boolean generate(World worldIn, Random rand, BlockPos position) {
          int i = rand.nextInt(3) + rand.nextInt(3) + 5;
          boolean flag = true;
  
          if (position.getY() >= 1 && position.getY() + i + 1 <= 256) {
              for (int j = position.getY(); j <= position.getY() + 1 + i; ++j) {
                  int k = 1;
  
                  if (j == position.getY()) {
                      k = 0;
                  }
  
                  if (j >= position.getY() + 1 + i - 2) {
                      k = 2;
                  }
  
                  BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();
  
                  for (int l = position.getX() - k; l <= position.getX() + k && flag; ++l) {
                      for (int i1 = position.getZ() - k; i1 <= position.getZ() + k && flag; ++i1) {
                          if (j >= 0 && j < 256) {
                              if (!this.func_150523_a(worldIn.getBlockState(blockpos$mutableblockpos.set(l, j, i1)).getBlock())) {
                                  flag = false;
                              }
                          } else {
                              flag = false;
                          }
                      }
                  }
              }
  
              if (!flag) {
                  return false;
              } else {
                  Block block = worldIn.getBlockState(position.down()).getBlock();
  
                  if ((block == Blocks.grass || block == Blocks.dirt) && position.getY() < 256 - i - 1) {
                      this.func_175921_a(worldIn, position.down());
                      EnumFacing enumfacing = EnumFacing.Plane.HORIZONTAL.random(rand);
                      int k2 = i - rand.nextInt(4) - 1;
                      int l2 = 3 - rand.nextInt(3);
                      int i3 = position.getX();
                      int j1 = position.getZ();
                      int k1 = 0;
  
                      for (int l1 = 0; l1 < i; ++l1) {
                          int i2 = position.getY() + l1;
  
                          if (l1 >= k2 && l2 > 0) {
                              i3 += enumfacing.getFrontOffsetX();
                              j1 += enumfacing.getFrontOffsetZ();
                              --l2;
                          }
  
                          BlockPos blockpos = new BlockPos(i3, i2, j1);
                          Material material = worldIn.getBlockState(blockpos).getBlock().getMaterial();
  
                          if (material == Material.air || material == Material.leaves) {
                              this.func_181642_b(worldIn, blockpos);
                              k1 = i2;
                          }
                      }
  
                      BlockPos blockpos2 = new BlockPos(i3, k1, j1);
  
                      for (int j3 = -3; j3 <= 3; ++j3) {
                          for (int i4 = -3; i4 <= 3; ++i4) {
                              if (Math.abs(j3) != 3 || Math.abs(i4) != 3) {
                                  this.func_175924_b(worldIn, blockpos2.add(j3, 0, i4));
                              }
                          }
                      }
  
                      blockpos2 = blockpos2.up();
  
                      for (int k3 = -1; k3 <= 1; ++k3) {
                          for (int j4 = -1; j4 <= 1; ++j4) {
                              this.func_175924_b(worldIn, blockpos2.add(k3, 0, j4));
                          }
                      }
  
                      this.func_175924_b(worldIn, blockpos2.east(2));
                      this.func_175924_b(worldIn, blockpos2.west(2));
                      this.func_175924_b(worldIn, blockpos2.south(2));
                      this.func_175924_b(worldIn, blockpos2.north(2));
                      i3 = position.getX();
                      j1 = position.getZ();
                      EnumFacing enumfacing1 = EnumFacing.Plane.HORIZONTAL.random(rand);
  
                      if (enumfacing1 != enumfacing) {
                          int l3 = k2 - rand.nextInt(2) - 1;
                          int k4 = 1 + rand.nextInt(3);
                          k1 = 0;
  
                          for (int l4 = l3; l4 < i && k4 > 0; --k4) {
                              if (l4 >= 1) {
                                  int j2 = position.getY() + l4;
                                  i3 += enumfacing1.getFrontOffsetX();
                                  j1 += enumfacing1.getFrontOffsetZ();
                                  BlockPos blockpos1 = new BlockPos(i3, j2, j1);
                                  Material material1 = worldIn.getBlockState(blockpos1).getBlock().getMaterial();
  
                                  if (material1 == Material.air || material1 == Material.leaves) {
                                      this.func_181642_b(worldIn, blockpos1);
                                      k1 = j2;
                                  }
                              }
  
                              ++l4;
                          }
  
                          if (k1 > 0) {
                              BlockPos blockpos3 = new BlockPos(i3, k1, j1);
  
                              for (int i5 = -2; i5 <= 2; ++i5) {
                                  for (int k5 = -2; k5 <= 2; ++k5) {
                                      if (Math.abs(i5) != 2 || Math.abs(k5) != 2) {
                                          this.func_175924_b(worldIn, blockpos3.add(i5, 0, k5));
                                      }
                                  }
                              }
  
                              blockpos3 = blockpos3.up();
  
                              for (int j5 = -1; j5 <= 1; ++j5) {
                                  for (int l5 = -1; l5 <= 1; ++l5) {
                                      this.func_175924_b(worldIn, blockpos3.add(j5, 0, l5));
                                  }
                              }
                          }
                      }
  
                      return true;
                  } else {
                      return false;
                  }
              }
          } else {
              return false;
          }
      }
  
      private void func_181642_b(World p_181642_1_, BlockPos p_181642_2_) {
          this.setBlockAndNotifyAdequately(p_181642_1_, p_181642_2_, field_181643_a);
      }
  
      private void func_175924_b(World worldIn, BlockPos p_175924_2_) {
          Material material = worldIn.getBlockState(p_175924_2_).getBlock().getMaterial();
  
          if (material == Material.air || material == Material.leaves) {
              this.setBlockAndNotifyAdequately(worldIn, p_175924_2_, field_181644_b);
          }
      }
  }
  