rework of world altitude calculation.

src/engine/gameManager/ZoneManager.java

@@ -9,6 +9,7 @@
 package engine.gameManager;
 
 import engine.Enum;
+import engine.InterestManagement.HeightMap;
 import engine.db.archive.CityRecord;
 import engine.db.archive.DataWarehouse;
 import engine.math.Bounds;
@@ -453,4 +454,23 @@ public enum ZoneManager {
             }
         }
     }
+
+    public static float caclulateWorldAltitude(Zone zone) {
+
+        float worldAlttitude = MBServerStatics.SEA_FLOOR_ALTITUDE;
+
+        if (getSeaFloor().getObjectUUID() == zone.getObjectUUID()) {
+            return worldAlttitude;
+        }
+
+        Zone parentZone = zone.getParent();
+
+        if (getSeaFloor().getObjectUUID() == parentZone.getObjectUUID()) {
+            return worldAlttitude + zone.getYCoord();
+        }
+
+        worldAlttitude = HeightMap.getWorldHeight(parentZone, zone.getLoc());
+
+        return worldAlttitude;
+    }
 }