-/*
- spring.hh -- declare Spring, Column_spring
-
+/*
+ spring.hh -- declare Spring
+
source file of the GNU LilyPond music typesetter
-
- (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#ifndef SPRING_HH
#define SPRING_HH
#include "lily-proto.hh"
-#include "drul-array.hh"
+#include "smobs.hh"
-struct Column_spring {
- Paper_column *other_l_;
- Real distance_f_;
- Real strength_f_;
-
- Column_spring ();
- static int compare (const Column_spring &r1, const Column_spring &r2);
- void print () const;
-};
+class Spring
+{
+ Real distance_;
+ Real min_distance_;
-struct Spring{
- Drul_array<Item*> item_l_drul_;
- Real distance_f_;
- Real strength_f_;
- void add_to_cols ();
+ Real inverse_stretch_strength_;
+ Real inverse_compress_strength_;
+
+ 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 */