void spawn_unit_actor(string name, float ap_fill_rate, int a, int b, int c)
    {
        GameObject unit  = tactical_map.place_unit(a, b, c);
        UnitActor  actor = unit.GetComponent <UnitActor>();

        actor.initialize(ap_fill_rate, turn_meter_controller);
        turn_meter_controller.register_actor(name, actor);
    }