Level biomes (basically a way of categorizing level generation parameters). The single player map is now divided into biomes, meaning that specific types of levels are generated at different areas of the map.

TODO: more variety between biomes, assign the map biomes in a less random way (e.g. splotches of easier biomes connected by more dangerous ones, very dangerous biomes at the edges of the map...), option to select the biome in MP?

Barotrauma/BarotraumaShared/Source/Map/Map/Map.cs

@@ -209,8 +209,46 @@ namespace Barotrauma
                 connection.CrackSegments = MathUtils.GenerateJaggedLine(start, end, generations, 5.0f);
             }
 
+            List<LocationConnection> biomeSeeds = new List<LocationConnection>();
+            foreach (Biome biome in LevelGenerationParams.GetBiomes())
+            {
+                LocationConnection seed = connections[0];
+                while (biomeSeeds.Contains(seed))
+                {
+                    seed = connections[Rand.Range(0, connections.Count, Rand.RandSync.Server)];
+                }
+                seed.Biome = biome;
+                biomeSeeds.Add(seed);
+            }
+
+            ExpandBiomes(biomeSeeds);
         }
 
+        private void ExpandBiomes(List<LocationConnection> seeds)
+        {
+            List<LocationConnection> nextSeeds = new List<LocationConnection>(); 
+            foreach (LocationConnection connection in seeds)
+            {
+                foreach (Location location in connection.Locations)
+                {
+                    foreach (LocationConnection otherConnection in location.Connections)
+                    {
+                        if (otherConnection == connection) continue;                        
+                        if (otherConnection.Biome != null) continue; //already assigned
+
+                        otherConnection.Biome = connection.Biome;
+                        nextSeeds.Add(otherConnection);                        
+                    }
+                }
+            }
+
+            if (nextSeeds.Count > 0)
+            {
+                ExpandBiomes(nextSeeds);
+            }
+        }
+        
+
         private void GenerateDifficulties(Location start, List<LocationConnection> locations, float currDifficulty)
         {
             //start.Difficulty = currDifficulty;
@@ -258,6 +296,8 @@ namespace Barotrauma
         private Location[] locations;
         private Level level;
 
+        public Biome Biome;
+
         public float Difficulty;
 
         public List<Vector2[]> CrackSegments;