content: package net.minecraft.world.gen;
  
  import net.minecraft.block.state.IBlockState;
  import net.minecraft.init.Blocks;
  import net.minecraft.util.MathHelper;
  import net.minecraft.world.World;
  import net.minecraft.world.chunk.ChunkPrimer;
  
  import java.util.Random;
  
  public class MapGenCavesHell extends MapGenBase {
      protected void func_180705_a(long p_180705_1_, int p_180705_3_, int p_180705_4_, ChunkPrimer p_180705_5_, double p_180705_6_, double p_180705_8_, double p_180705_10_) {
          this.func_180704_a(p_180705_1_, p_180705_3_, p_180705_4_, p_180705_5_, p_180705_6_, p_180705_8_, p_180705_10_, 1.0F + this.rand.nextFloat() * 6.0F, 0.0F, 0.0F, -1, -1, 0.5D);
      }
  
      protected void func_180704_a(long p_180704_1_, int p_180704_3_, int p_180704_4_, ChunkPrimer p_180704_5_, double p_180704_6_, double p_180704_8_, double p_180704_10_, float p_180704_12_, float p_180704_13_, float p_180704_14_, int p_180704_15_, int p_180704_16_, double p_180704_17_) {
          double d0 = p_180704_3_ * 16 + 8;
          double d1 = p_180704_4_ * 16 + 8;
          float f = 0.0F;
          float f1 = 0.0F;
          Random random = new Random(p_180704_1_);
  
          if (p_180704_16_ <= 0) {
              int i = this.range * 16 - 16;
              p_180704_16_ = i - random.nextInt(i / 4);
          }
  
          boolean flag1 = false;
  
          if (p_180704_15_ == -1) {
              p_180704_15_ = p_180704_16_ / 2;
              flag1 = true;
          }
  
          int j = random.nextInt(p_180704_16_ / 2) + p_180704_16_ / 4;
  
          for (boolean flag = random.nextInt(6) == 0; p_180704_15_ < p_180704_16_; ++p_180704_15_) {
              double d2 = 1.5D + (double) (MathHelper.sin((float) p_180704_15_ * (float) Math.PI / (float) p_180704_16_) * p_180704_12_ * 1.0F);
              double d3 = d2 * p_180704_17_;
              float f2 = MathHelper.cos(p_180704_14_);
              float f3 = MathHelper.sin(p_180704_14_);
              p_180704_6_ += MathHelper.cos(p_180704_13_) * f2;
              p_180704_8_ += f3;
              p_180704_10_ += MathHelper.sin(p_180704_13_) * f2;
  
              if (flag) {
                  p_180704_14_ = p_180704_14_ * 0.92F;
              } else {
                  p_180704_14_ = p_180704_14_ * 0.7F;
              }
  
              p_180704_14_ = p_180704_14_ + f1 * 0.1F;
              p_180704_13_ += f * 0.1F;
              f1 = f1 * 0.9F;
              f = f * 0.75F;
              f1 = f1 + (random.nextFloat() - random.nextFloat()) * random.nextFloat() * 2.0F;
              f = f + (random.nextFloat() - random.nextFloat()) * random.nextFloat() * 4.0F;
  
              if (!flag1 && p_180704_15_ == j && p_180704_12_ > 1.0F) {
                  this.func_180704_a(random.nextLong(), p_180704_3_, p_180704_4_, p_180704_5_, p_180704_6_, p_180704_8_, p_180704_10_, random.nextFloat() * 0.5F + 0.5F, p_180704_13_ - ((float) Math.PI / 2F), p_180704_14_ / 3.0F, p_180704_15_, p_180704_16_, 1.0D);
                  this.func_180704_a(random.nextLong(), p_180704_3_, p_180704_4_, p_180704_5_, p_180704_6_, p_180704_8_, p_180704_10_, random.nextFloat() * 0.5F + 0.5F, p_180704_13_ + ((float) Math.PI / 2F), p_180704_14_ / 3.0F, p_180704_15_, p_180704_16_, 1.0D);
                  return;
              }
  
              if (flag1 || random.nextInt(4) != 0) {
                  double d4 = p_180704_6_ - d0;
                  double d5 = p_180704_10_ - d1;
                  double d6 = p_180704_16_ - p_180704_15_;
                  double d7 = p_180704_12_ + 2.0F + 16.0F;
  
                  if (d4 * d4 + d5 * d5 - d6 * d6 > d7 * d7) {
                      return;
                  }
  
                  if (p_180704_6_ >= d0 - 16.0D - d2 * 2.0D && p_180704_10_ >= d1 - 16.0D - d2 * 2.0D && p_180704_6_ <= d0 + 16.0D + d2 * 2.0D && p_180704_10_ <= d1 + 16.0D + d2 * 2.0D) {
                      int j2 = MathHelper.floor_double(p_180704_6_ - d2) - p_180704_3_ * 16 - 1;
                      int k = MathHelper.floor_double(p_180704_6_ + d2) - p_180704_3_ * 16 + 1;
                      int k2 = MathHelper.floor_double(p_180704_8_ - d3) - 1;
                      int l = MathHelper.floor_double(p_180704_8_ + d3) + 1;
                      int l2 = MathHelper.floor_double(p_180704_10_ - d2) - p_180704_4_ * 16 - 1;
                      int i1 = MathHelper.floor_double(p_180704_10_ + d2) - p_180704_4_ * 16 + 1;
  
                      if (j2 < 0) {
                          j2 = 0;
                      }
  
                      if (k > 16) {
                          k = 16;
                      }
  
                      if (k2 < 1) {
                          k2 = 1;
                      }
  
                      if (l > 120) {
                          l = 120;
                      }
  
                      if (l2 < 0) {
                          l2 = 0;
                      }
  
                      if (i1 > 16) {
                          i1 = 16;
                      }
  
                      boolean flag2 = false;
  
                      for (int j1 = j2; !flag2 && j1 < k; ++j1) {
                          for (int k1 = l2; !flag2 && k1 < i1; ++k1) {
                              for (int l1 = l + 1; !flag2 && l1 >= k2 - 1; --l1) {
                                  if (l1 >= 0 && l1 < 128) {
                                      IBlockState iblockstate = p_180704_5_.getBlockState(j1, l1, k1);
  
                                      if (iblockstate.getBlock() == Blocks.flowing_lava || iblockstate.getBlock() == Blocks.lava) {
                                          flag2 = true;
                                      }
  
                                      if (l1 != k2 - 1 && j1 != j2 && j1 != k - 1 && k1 != l2 && k1 != i1 - 1) {
                                          l1 = k2;
                                      }
                                  }
                              }
                          }
                      }
  
                      if (!flag2) {
                          for (int i3 = j2; i3 < k; ++i3) {
                              double d10 = ((double) (i3 + p_180704_3_ * 16) + 0.5D - p_180704_6_) / d2;
  
                              for (int j3 = l2; j3 < i1; ++j3) {
                                  double d8 = ((double) (j3 + p_180704_4_ * 16) + 0.5D - p_180704_10_) / d2;
  
                                  for (int i2 = l; i2 > k2; --i2) {
                                      double d9 = ((double) (i2 - 1) + 0.5D - p_180704_8_) / d3;
  
                                      if (d9 > -0.7D && d10 * d10 + d9 * d9 + d8 * d8 < 1.0D) {
                                          IBlockState iblockstate1 = p_180704_5_.getBlockState(i3, i2, j3);
  
                                          if (iblockstate1.getBlock() == Blocks.netherrack || iblockstate1.getBlock() == Blocks.dirt || iblockstate1.getBlock() == Blocks.grass) {
                                              p_180704_5_.setBlockState(i3, i2, j3, Blocks.air.getDefaultState());
                                          }
                                      }
                                  }
                              }
                          }
  
                          if (flag1) {
                              break;
                          }
                      }
                  }
              }
          }
      }
  
      protected void recursiveGenerate(World worldIn, int chunkX, int chunkZ, int p_180701_4_, int p_180701_5_, ChunkPrimer chunkPrimerIn) {
          int i = this.rand.nextInt(this.rand.nextInt(this.rand.nextInt(10) + 1) + 1);
  
          if (this.rand.nextInt(5) != 0) {
              i = 0;
          }
  
          for (int j = 0; j < i; ++j) {
              double d0 = chunkX * 16 + this.rand.nextInt(16);
              double d1 = this.rand.nextInt(128);
              double d2 = chunkZ * 16 + this.rand.nextInt(16);
              int k = 1;
  
              if (this.rand.nextInt(4) == 0) {
                  this.func_180705_a(this.rand.nextLong(), p_180701_4_, p_180701_5_, chunkPrimerIn, d0, d1, d2);
                  k += this.rand.nextInt(4);
              }
  
              for (int l = 0; l < k; ++l) {
                  float f = this.rand.nextFloat() * (float) Math.PI * 2.0F;
                  float f1 = (this.rand.nextFloat() - 0.5F) * 2.0F / 8.0F;
                  float f2 = this.rand.nextFloat() * 2.0F + this.rand.nextFloat();
                  this.func_180704_a(this.rand.nextLong(), p_180701_4_, p_180701_5_, chunkPrimerIn, d0, d1, d2, f2 * 2.0F, f, f1, 0, 0, 0.5D);
              }
          }
      }
  }
  