Start terrain refactor

src/engine/objects/City.java

@@ -11,8 +11,8 @@ package engine.objects;
 
 import engine.Enum;
 import engine.Enum.*;
-import engine.InterestManagement.HeightMap;
 import engine.InterestManagement.RealmMap;
+import engine.InterestManagement.Terrain;
 import engine.InterestManagement.WorldGrid;
 import engine.db.archive.CityRecord;
 import engine.db.archive.DataWarehouse;
@@ -588,7 +588,7 @@ public class City extends AbstractWorldObject {
             this.setBounds(cityBounds);
 
             if (zone.getHeightMap() == null && this.isNpc == 1 && this.getObjectUUID() != 1213) {
-                HeightMap.GenerateCustomHeightMap(zone);
+                Terrain.GenerateCustomHeightMap(zone);
                 Logger.info(zone.zoneName + " created custom heightmap");
             }
         } catch (Exception e) {