/// lat/lon pair. If there is no scenery for that point, the altitude
/// value is undefined.
/// All values are meant to be in meters.
- bool get_cart_elevation_m(const sgdVec3 pos, double max_altoff,
+ bool get_cart_elevation_m(const sgdVec3& pos, double max_altoff,
double& radius, bool exact = false);
- inline Point3D get_center() const { return center; }
- void set_center( Point3D p );
+ inline const Point3D& get_center() const { return center; }
+ void set_center( const Point3D& p );
- inline Point3D get_next_center() const { return next_center; }
- inline void set_next_center( Point3D p ) { next_center = p; }
+ inline const Point3D& get_next_center() const { return next_center; }
+ inline void set_next_center( const Point3D& p ) { next_center = p; }
inline ssgRoot *get_scene_graph () const { return scene_graph; }
inline void set_scene_graph (ssgRoot * s) { scene_graph = s; }