/*
beam.hh -- part of GNU LilyPond
- (c) 1996,97 Han-Wen Nienhuys
+ (c) 1996--2000 Han-Wen Nienhuys
*/
#ifndef BEAM_HH
#define BEAM_HH
+
#include "lily-proto.hh"
-#include "directional-spanner.hh"
-#include "plist.hh"
+#include "spanner.hh"
+
+
+/** a beam connects multiple stems.
-/** 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 adjusts the stems its owns to make sure that they reach the
+ beam and that point in the correct direction (urg?)
+
+ elt_properties:
+ y-position: real (position of left edge)
+ height: real (dy)
+
+ damping: amount of beam slope damping. (int)
+ should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
+*/
+class Beam : public 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)
- 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*);
+ static SCM brew_molecule (SCM);
+
+ 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;
+
+ Beam (SCM);
+ 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);
-
-protected:
- virtual Interval do_width () const;
- Offset center () const;
- void set_default_dir ();
- 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 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;
+ VIRTUAL_COPY_CONS(Score_element);
+
+ int get_multiplicity () const;
+
+public:
+
+ SCM member_before_line_breaking ();
+ static SCM before_line_breaking (SCM);
+ SCM member_after_line_breaking ();
+ static SCM after_line_breaking (SCM);
+ SCM member_brew_molecule () const;
+
+ Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
+private:
+ Direction get_default_dir () const;
+ void set_stem_directions ();
+ void auto_knees ();
+ bool auto_knee (String gap_str, bool interstaff_b);
+ void set_stem_shorten ();
+ void calc_default_position_and_height (Real* y, Real* dy) const;
+ bool suspect_slope_b (Real y, Real dy) const;
+ Real calc_slope_damping_f (Real dy) const;
+ Real calc_stem_y_f (Stem* s, Real y, Real dy) const;
+ Real check_stem_length_f (Real y, Real dy) const;
+ void set_stem_length (Real y, Real dy);
+ Real quantise_dy_f (Real dy) const;
+ Real quantise_y_f (Real y, Real dy, int quant_dir);
+ int forced_stem_count () const;
};
#endif // BEAM_HH