vector<Real> solve_derivative (Offset) const;
Interval extent (Axis) const;
Interval control_point_extent (Axis) const;
Polynomial polynomial (Axis)const;
Offset curve_point (Real t) const;
vector<Real> solve_derivative (Offset) const;
Interval extent (Axis) const;
Interval control_point_extent (Axis) const;
Polynomial polynomial (Axis)const;
Offset curve_point (Real t) const;