/*
beam.hh -- part of GNU LilyPond
- (c) 1996,97 Han-Wen Nienhuys
+ (c) 1996--1999 Han-Wen Nienhuys
*/
#ifndef BEAM_HH
#define BEAM_HH
+
#include "lily-proto.hh"
#include "directional-spanner.hh"
-#include "plist.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 {
+ beam and that point in the correct direction
+
+elt property:
+
+damping: amount of beam slope damping. (int)
+
+should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
+
+slope_quantisation: 'none, 'normal or 'traditional
+
+*/
+class Beam : public Directional_spanner {
public:
- enum Pos { NONE, SIT = 1, STRADDLE = 2, HANG = 4, INTER = 8 };
- // ugh, silly C++
- enum Quantise { NUN, NORMAL, TRADITIONAL };
- Link_array<Stem> stems_;
- /// the slope of the beam in posns / point (dimension)
+ int stem_count () const;
+ Stem* stem (int) const;
+ Stem* stem_top () const;
+ int visible_stem_count () const;
+ Stem* first_visible_stem () const;
+ Stem* last_visible_stem () const;
+
+ /**
+ the slope of the beam in (staffpositions) per (X-dimension, in PT).
+ UGH. standardise this for once and for all.
+ */
Real 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
- Quantise quantisation_;
- /// maximum number of beams (for opening-up of beam-spacing)
- int multiple_i_;
+ /**
+ */
- DECLARE_MY_RUNTIME_TYPEINFO;
- Beam();
- void add (Stem*);
+ Beam ();
+ void add_stem (Stem*);
void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
+ void set_beaming (Beaming_info_list *);
void set_stemlens ();
- SCORE_ELEM_CLONE (Beam);
+ VIRTUAL_COPY_CONS(Score_element);
+ int multiplicity_i () const;
protected:
- virtual Interval do_width () const;
Offset center () const;
- void set_default_dir ();
+ Direction get_default_dir () const;
+ void set_direction (Direction);
+ void set_stem_shorten ();
+ bool auto_knee (SCM gap, bool interstaff_b);
+ bool auto_knees ();
+
virtual void do_pre_processing ();
virtual void do_post_processing ();
- virtual void do_substitute_dependent (Score_elem*, Score_elem*);
-
virtual void do_print() const;
+ virtual Molecule*do_brew_molecule_p () const;
+
+ Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
+
+private:
+ void calculate_slope ();
+ Real check_stemlengths_f (bool set_b);
+ void solve_slope ();
+
+ void quantise_left_y (bool extend_b);
+ void quantise_dy ();
- virtual void quantise_left_y (Beam::Pos pos, bool extend_b);
- virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
- virtual void solve_slope ();
- virtual void quantise_yspan ();
- virtual Molecule*brew_molecule_p () const;
};
#endif // BEAM_HH