release: 1.3.44

[lilypond.git] / lily / include / beam.hh

diff --git a/lily/include/beam.hh b/lily/include/beam.hh
index 7106cbf0d586e757f1ea2098d1092d2555247353..768d07aaa75c311e71c229467b122fe6a115f417 100644 (file)
--- a/lily/include/beam.hh
+++ b/lily/include/beam.hh
@@ -1,61 +1,70 @@
 /*
   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.
+
+  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)
 
-/** 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 {
+   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*);
 
+  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 ();
+  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 get_multiplicity () const;
 
 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 void before_line_breaking ();
+  virtual void after_line_breaking ();
+  virtual Molecule do_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