X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fspring.hh;h=f4f943f899b5286cbabb18223cdaf40cc97dc846;hb=5b4b0d6e9a197e8f9eb085b7c2ad78b8be3e5cfc;hp=58b72feb0e352ff4ca37d08a3888135f1e13af36;hpb=5d1ddaf889233f8e5c32a118f9e843e1becca2d2;p=lilypond.git

diff --git a/lily/include/spring.hh b/lily/include/spring.hh
index 58b72feb0e..f4f943f899 100644
--- a/lily/include/spring.hh
+++ b/lily/include/spring.hh
@@ -1,11 +1,10 @@
-/*   
-  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@cs.uu.nl>
-  
- */
+
+  (c) 1999--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
 
 #ifndef SPRING_HH
 #define SPRING_HH
@@ -13,34 +12,44 @@
 #include "lily-proto.hh"
 #include "smobs.hh"
 
-struct Spring_smob
+class Spring
 {
-  Grob *other_;
   Real distance_;
-  bool expand_only_b_;
-  Real strength_;
-  
-  DECLARE_SIMPLE_SMOBS(Spring_smob, dummy);
-public:
-  Spring_smob();
-};
-DECLARE_UNSMOB(Spring_smob, spring);
+  Real min_distance_;
 
-struct Spring
-{
-  Drul_array<Item*> item_l_drul_;
-  Real distance_;
-  bool expand_only_b_;
-
-  /*
-    TODO: make 2 strengths: one for stretching, and one for shrinking.
-  */
-  Real strength_;
-  void add_to_cols ();
-  void set_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 */