void add_spring (Real, Real);
Real range_ideal_len (int l, int r) const;
Real range_stiffness (int l, int r) const;
- Real configuration_length () const;
+ Real configuration_length (Real) const;
vector<Real> spring_positions () const;
- Real force ();
- bool fits ();
+ Real force () const;
+ bool fits () const;
DECLARE_SIMPLE_SMOBS (Simple_spacer,);