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 {
20 The beams should be prevented to conflict with the stafflines,
21 especially at small slopes.
23 enum Quantisation { NONE, NORMAL, TRADITIONAL, TEST };
25 Link_array<Stem> stems_;
26 /// the slope of the beam in posns / point (dimension)
28 /// the slope as solved; not quantised or damped
31 /// position of leftmost end of beam
33 /// should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
35 /// should beam pos / slope be quantised? 0: no, 1: yes, 2: traditional
36 Quantisation quantisation_;
37 /// maximum number of beams (for opening-up of beam-spacing)
41 DECLARE_MY_RUNTIME_TYPEINFO;
45 void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
47 SCORE_ELEM_CLONE (Beam);
50 virtual Interval do_width () const;
51 Offset center () const;
52 void set_default_dir ();
53 virtual void do_pre_processing ();
54 virtual void do_post_processing ();
55 virtual void do_substitute_dependent (Score_elem*, Score_elem*);
57 virtual void do_print() const;
59 virtual void quantise_left_y (bool extend_b);
60 virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
61 virtual void solve_slope ();
62 virtual void quantise_dy ();
63 virtual Molecule*brew_molecule_p () const;