/*
- beam.hh -- part of LilyPond
+ 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 "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 */
-struct Beam: public Directional_spanner {
- Link_list<Stem*> stems;
- /// the slope of the beam in posns / point (dimension)
- Real slope;
-
- /// position of leftmost end of beam
- Real left_pos;
-
-
- /* *************** */
-NAME_MEMBERS(Beam);
-
- virtual Interval do_width()const;
- Offset center() const;
- Spanner *do_break_at(PCol *, PCol *) const;
- Beam();
- void add(Stem*);
-
-
- void set_default_dir();
- void do_pre_processing();
- void do_post_processing();
-
- void do_print() const;
- void set_grouping(Rhythmic_grouping def, Rhythmic_grouping current);
- void set_stemlens();
- ~Beam();
+#include "lily-proto.hh"
+#include "spanner.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 (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:
+ 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 ();
+ 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:
- Molecule stem_beams(Stem *here, Stem *next, Stem *prev)const;
- void solve_slope();
- Molecule*brew_molecule_p()const;
+ 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