2 beam.hh -- part of GNU LilyPond
4 (c) 1996,97 Han-Wen Nienhuys
9 #include "lily-proto.hh"
10 #include "directional-spanner.hh"
13 /** a beam connects multiple stems.
15 Beam adjusts the stems its owns to make sure that they reach the
16 beam and that point in the correct direction */
17 class Beam: public Directional_spanner {
19 enum Pos { NONE, SIT = 1, STRADDLE = 2, HANG = 4, INTER = 8 };
21 enum Quantise { NUN, NORMAL, TRADITIONAL };
23 Link_array<Stem> stems_;
24 /// the slope of the beam in posns / point (dimension)
27 /// position of leftmost end of beam
29 /// should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
31 /// should beam pos / slope be quantised? 0: no, 1: yes, 2: traditional
32 Quantise quantisation_;
33 /// maximum number of beams (for opening-up of beam-spacing)
37 DECLARE_MY_RUNTIME_TYPEINFO;
41 void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
43 SCORE_ELEM_CLONE (Beam);
46 virtual Interval do_width () const;
47 Offset center () const;
48 void set_default_dir ();
49 virtual void do_pre_processing ();
50 virtual void do_post_processing ();
51 virtual void do_substitute_dependent (Score_elem*, Score_elem*);
53 virtual void do_print() const;
55 virtual void quantise_left_y (Beam::Pos pos, bool extend_b);
56 virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
57 virtual void solve_slope ();
58 virtual void quantise_yspan ();
59 virtual Molecule*brew_molecule_p () const;