2 beam.hh -- part of GNU LilyPond
4 (c) 1996--1999 Han-Wen Nienhuys
10 #include "lily-proto.hh"
11 #include "directional-spanner.hh"
12 #include "stem-info.hh"
15 /** a beam connects multiple stems.
17 Beam adjusts the stems its owns to make sure that they reach the
18 beam and that point in the correct direction */
19 class Beam: public Directional_spanner {
22 The beams should be prevented to conflict with the stafflines,
23 especially at small slopes.
25 enum Quantisation { NONE, NORMAL, TRADITIONAL, TEST };
26 enum Dir_algorithm { /* DOWN=-1, UP=1, */ MAJORITY=2, MEAN, MEDIAN };
28 Link_array<Stem> stems_;
29 /// the slope of the beam in posns / point (dimension)
31 /// the slope as solved; not quantised or damped
34 /// position of leftmost end of beam
36 /// should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
38 /// should beam pos / slope be quantised? 0: no, 1: yes, 2: traditional
39 Quantisation quantisation_;
40 /// maximum number of beams (for opening-up of beam-spacing)
43 /// vertical align distance between staffs
44 Drul_array<Real> vertical_align_drul_;
46 Array<Stem_info> sinfo_;
49 void add_stem (Stem*);
51 void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
53 VIRTUAL_COPY_CONS(Score_element);
56 virtual Interval do_width () const;
57 Offset center () const;
58 void set_default_dir ();
60 virtual void do_pre_processing ();
61 virtual void do_post_processing ();
62 virtual void do_substitute_dependent (Score_element*, Score_element*);
64 virtual void do_print() const;
66 virtual void quantise_left_y (bool extend_b);
67 virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
68 virtual void calculate_slope ();
69 virtual Real check_stemlengths_f (bool set_b);
70 virtual void solve_slope ();
71 virtual void quantise_dy ();
72 virtual Molecule*do_brew_molecule_p () const;