content: package net.minecraft.world.gen.layer;
  
  import net.minecraft.world.biome.BiomeGenBase;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  public class GenLayerHills extends GenLayer {
      private static final Logger logger = LogManager.getLogger();
      private final GenLayer field_151628_d;
  
      public GenLayerHills(long p_i45479_1_, GenLayer p_i45479_3_, GenLayer p_i45479_4_) {
          super(p_i45479_1_);
          this.parent = p_i45479_3_;
          this.field_151628_d = p_i45479_4_;
      }
  
      public int[] getInts(int areaX, int areaY, int areaWidth, int areaHeight) {
          int[] aint = this.parent.getInts(areaX - 1, areaY - 1, areaWidth + 2, areaHeight + 2);
          int[] aint1 = this.field_151628_d.getInts(areaX - 1, areaY - 1, areaWidth + 2, areaHeight + 2);
          int[] aint2 = IntCache.getIntCache(areaWidth * areaHeight);
  
          for (int i = 0; i < areaHeight; ++i) {
              for (int j = 0; j < areaWidth; ++j) {
                  this.initChunkSeed(j + areaX, i + areaY);
                  int k = aint[j + 1 + (i + 1) * (areaWidth + 2)];
                  int l = aint1[j + 1 + (i + 1) * (areaWidth + 2)];
                  boolean flag = (l - 2) % 29 == 0;
  
                  if (k > 255) {
                      logger.debug("old! " + k);
                  }
  
                  if (k != 0 && l >= 2 && (l - 2) % 29 == 1 && k < 128) {
                      if (BiomeGenBase.getBiome(k + 128) != null) {
                          aint2[j + i * areaWidth] = k + 128;
                      } else {
                          aint2[j + i * areaWidth] = k;
                      }
                  } else if (this.nextInt(3) != 0 && !flag) {
                      aint2[j + i * areaWidth] = k;
                  } else {
                      int i1 = k;
  
                      if (k == BiomeGenBase.desert.biomeID) {
                          i1 = BiomeGenBase.desertHills.biomeID;
                      } else if (k == BiomeGenBase.forest.biomeID) {
                          i1 = BiomeGenBase.forestHills.biomeID;
                      } else if (k == BiomeGenBase.birchForest.biomeID) {
                          i1 = BiomeGenBase.birchForestHills.biomeID;
                      } else if (k == BiomeGenBase.roofedForest.biomeID) {
                          i1 = BiomeGenBase.plains.biomeID;
                      } else if (k == BiomeGenBase.taiga.biomeID) {
                          i1 = BiomeGenBase.taigaHills.biomeID;
                      } else if (k == BiomeGenBase.megaTaiga.biomeID) {
                          i1 = BiomeGenBase.megaTaigaHills.biomeID;
                      } else if (k == BiomeGenBase.coldTaiga.biomeID) {
                          i1 = BiomeGenBase.coldTaigaHills.biomeID;
                      } else if (k == BiomeGenBase.plains.biomeID) {
                          if (this.nextInt(3) == 0) {
                              i1 = BiomeGenBase.forestHills.biomeID;
                          } else {
                              i1 = BiomeGenBase.forest.biomeID;
                          }
                      } else if (k == BiomeGenBase.icePlains.biomeID) {
                          i1 = BiomeGenBase.iceMountains.biomeID;
                      } else if (k == BiomeGenBase.jungle.biomeID) {
                          i1 = BiomeGenBase.jungleHills.biomeID;
                      } else if (k == BiomeGenBase.ocean.biomeID) {
                          i1 = BiomeGenBase.deepOcean.biomeID;
                      } else if (k == BiomeGenBase.extremeHills.biomeID) {
                          i1 = BiomeGenBase.extremeHillsPlus.biomeID;
                      } else if (k == BiomeGenBase.savanna.biomeID) {
                          i1 = BiomeGenBase.savannaPlateau.biomeID;
                      } else if (biomesEqualOrMesaPlateau(k, BiomeGenBase.mesaPlateau_F.biomeID)) {
                          i1 = BiomeGenBase.mesa.biomeID;
                      } else if (k == BiomeGenBase.deepOcean.biomeID && this.nextInt(3) == 0) {
                          int j1 = this.nextInt(2);
  
                          if (j1 == 0) {
                              i1 = BiomeGenBase.plains.biomeID;
                          } else {
                              i1 = BiomeGenBase.forest.biomeID;
                          }
                      }
  
                      if (flag && i1 != k) {
                          if (BiomeGenBase.getBiome(i1 + 128) != null) {
                              i1 += 128;
                          } else {
                              i1 = k;
                          }
                      }
  
                      if (i1 == k) {
                          aint2[j + i * areaWidth] = k;
                      } else {
                          int k2 = aint[j + 1 + (i + 1 - 1) * (areaWidth + 2)];
                          int k1 = aint[j + 1 + 1 + (i + 1) * (areaWidth + 2)];
                          int l1 = aint[j + 1 - 1 + (i + 1) * (areaWidth + 2)];
                          int i2 = aint[j + 1 + (i + 1 + 1) * (areaWidth + 2)];
                          int j2 = 0;
  
                          if (biomesEqualOrMesaPlateau(k2, k)) {
                              ++j2;
                          }
  
                          if (biomesEqualOrMesaPlateau(k1, k)) {
                              ++j2;
                          }
  
                          if (biomesEqualOrMesaPlateau(l1, k)) {
                              ++j2;
                          }
  
                          if (biomesEqualOrMesaPlateau(i2, k)) {
                              ++j2;
                          }
  
                          if (j2 >= 3) {
                              aint2[j + i * areaWidth] = i1;
                          } else {
                              aint2[j + i * areaWidth] = k;
                          }
                      }
                  }
              }
          }
  
          return aint2;
      }
  }
  