def __init__(self, game, planet_class=Planet, fleet_class=Fleet):
     Universe.__init__(self, game, planet_class, fleet_class)
     self._rally_cache = None
     self._frontlines_cache = None
     self.center = (17,17)
 def __init__(self, game, planet_class=Planet, fleet_class=Fleet):
     Universe.__init__(self, game, planet_class=Planet, fleet_class=Fleet)
     self._rally_cache = None
     self.center = Point(17,17)