-/*
- spring.hh -- declare Spring, Column_spring
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 1999--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
#ifndef SPRING_HH
#define SPRING_HH
#include "lily-proto.hh"
-#include "drul-array.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:
- SCM smobbed_copy () const;
- 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 ensure_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 set_default_compress_strength ();
+ void set_default_stretch_strength ();
+
+ void operator *= (Real);
+ bool operator > (Spring const &) const;
};
+DECLARE_UNSMOB (Spring, spring);
+Spring merge_springs (vector<Spring> const &springs);
#endif /* SPRING_HH */