/*
beam.hh -- part of GNU LilyPond
- (c) 1996--1998 Han-Wen Nienhuys
+ (c) 1996--2001 Han-Wen Nienhuys
*/
#ifndef BEAM_HH
#define BEAM_HH
#include "lily-proto.hh"
-#include "directional-spanner.hh"
-#include "stem-info.hh"
-#include "plist.hh"
+#include "lily-guile.hh"
-/** a beam connects multiple stems.
- Beam adjusts the stems its owns to make sure that they reach the
- beam and that point in the correct direction */
-class Beam: public Directional_spanner {
-public:
- /**
- The beams should be prevented to conflict with the stafflines,
- especially at small slopes.
- */
- enum Quantisation { NONE, NORMAL, TRADITIONAL, TEST };
- enum Dir_algorithm { /* DOWN=-1, UP=1, */ MAJORITY=2, MEAN, MEDIAN };
-
- Link_array<Stem> stems_;
- /// the slope of the beam in posns / point (dimension)
- Real slope_f_;
- /// the slope as solved; not quantised or damped
- Real solved_slope_f_;
-
- /// position of leftmost end of beam
- Real left_y_;
- /// should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
- int damping_i_;
- /// should beam pos / slope be quantised? 0: no, 1: yes, 2: traditional
- Quantisation quantisation_;
- /// maximum number of beams (for opening-up of beam-spacing)
- int multiple_i_;
-
- Array<Stem_info> sinfo_;
-
- Beam();
- void add_stem (Stem*);
- void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
- void set_stemlens ();
- VIRTUAL_COPY_CONS(Score_element);
-
-protected:
- virtual Interval do_width () const;
- Offset center () const;
- void set_default_dir ();
- void set_steminfo ();
- virtual void do_pre_processing ();
- virtual void do_post_processing ();
- virtual void do_substitute_dependent (Score_element*, Score_element*);
-
- virtual void do_print() const;
-
- virtual void quantise_left_y (bool extend_b);
- virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
- virtual void calculate_slope ();
- virtual Real check_stemlengths_f (bool set_b);
- virtual void solve_slope ();
- virtual void quantise_dy ();
- virtual Molecule*do_brew_molecule_p () const;
+class Beam
+{
+public:
+ static int visible_stem_count (Grob*);
+ static Item* first_visible_stem (Grob*);
+ static Item* last_visible_stem (Grob*);
+ static bool has_interface (Grob*);
+ DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM axis));
+ Beam (SCM);
+ static void add_stem (Grob*,Grob*);
+ static void set_beaming (Grob*,Beaming_info_list *);
+ static void set_stemlens (Grob*);
+ static int get_multiplicity (Grob*me);
+ DECLARE_SCHEME_CALLBACK (brew_molecule, (SCM ));
+ DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM ));
+ DECLARE_SCHEME_CALLBACK (after_line_breaking, (SCM ));
+
+ /*
+ y-dy callbacks
+ */
+ DECLARE_SCHEME_CALLBACK (least_squares, (SCM));
+ DECLARE_SCHEME_CALLBACK (cancel_suspect_slope, (SCM));
+ DECLARE_SCHEME_CALLBACK (slope_damping, (SCM));
+ DECLARE_SCHEME_CALLBACK (quantise_dy, (SCM));
+ DECLARE_SCHEME_CALLBACK (user_override, (SCM));
+ DECLARE_SCHEME_CALLBACK (do_quantise_y, (SCM));
+
+ static Molecule stem_beams (Grob*,Item *here, Item *next, Item *prev);
+
+private:
+ static Direction get_default_dir (Grob*);
+ static void set_stem_directions (Grob*);
+ static void consider_auto_knees (Grob*);
+ static void set_stem_shorten (Grob*);
+ static Real calc_stem_y_f (Grob*, Item* s, Real y, Real dy);
+ static Real check_stem_length_f (Grob*, Real y, Real dy);
+ static void set_stem_lengths (Grob*);
+ static Real quantise_y_f (Grob*, Real y, Real dy, int quant_dir);
+ static int forced_stem_count (Grob*);
};
-#endif // BEAM_HH
+#endif /* BEAM_HH */