vector<Real> get_other_coordinates (Axis a, Real x) const;
vector<Real> solve_point (Axis, Real coordinate) const;
Real minmax (Axis, Real, Real, Direction) const;
- Real minmax (Axis, Real, Real, Direction, vsize, vsize) const;
vector<Real> solve_derivative (Offset) const;
Interval extent (Axis) const;
Interval control_point_extent (Axis) const;