+
+ void add_vehicle(Vehicle3D &);
+ void remove_vehicle(Vehicle3D &);
+ Vehicle3D &get_vehicle(Vehicle &) const;
+
+ Msp::GL::Scene &get_scene() { return scene; }
+ Msp::GL::Scene &get_endpoint_scene() { return ep_scene; }
+ Msp::GL::Scene &get_path_scene() { return path_scene; }
+