/*
- spring.hh -- declare Spring, Column_spring
+ spring.hh -- declare Spring
source file of the GNU LilyPond music typesetter
- (c) 1999--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#ifndef SPRING_HH
#include "lily-proto.hh"
#include "smobs.hh"
-struct Spring_smob
+class Spring
{
- Grob *other_;
Real distance_;
- bool expand_only_b_;
- Real inverse_strength_;
+ Real min_distance_;
- DECLARE_SIMPLE_SMOBS (Spring_smob, dummy);
-public:
- Spring_smob ();
-};
-DECLARE_UNSMOB (Spring_smob, spring);
+ Real inverse_stretch_strength_;
+ Real inverse_compress_strength_;
-struct Spring
-{
- Drul_array<Item *> item_drul_;
- Real distance_;
- bool expand_only_b_;
-
- /*
- TODO: make 2 strengths: one for stretching, and one for shrinking.
- */
- Real inverse_strength_;
- void add_to_cols ();
- void set_to_cols ();
+ Real blocking_force_;
+
+ void update_blocking_force ();
+
+ DECLARE_SIMPLE_SMOBS (Spring);
+public:
Spring ();
+ Spring (Real distance, Real min_distance);
+
+ Real distance () const {return distance_;}
+ Real min_distance () const {return min_distance_;}
+ Real inverse_stretch_strength () const {return inverse_stretch_strength_;}
+ Real inverse_compress_strength () const {return inverse_compress_strength_;}
+ Real blocking_force () const {return blocking_force_;}
+
+ Real length (Real f) const;
+
+ void set_distance (Real);
+ void set_min_distance (Real);
+ void set_inverse_stretch_strength (Real);
+ void set_inverse_compress_strength (Real);
+ void set_blocking_force (Real);
+ void set_default_strength ();
+
+ void operator*= (Real);
+ bool operator> (Spring const&) const;
};
+DECLARE_UNSMOB (Spring, spring);
+
+Spring merge_springs (vector<Spring> const &springs);
#endif /* SPRING_HH */