/*
beam.hh -- part of GNU LilyPond
- (c) 1996--1998 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 "lily-guile.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 (urg?)
+
+ elt_properties:
+
+ y-position -- real (position of left edge)
+
+ height -- real (dy)
+
+
+ Read-only
+ =========
+
+ flag-width-function --
+
+ damping -- amount of beam slope damping. (int)
+ should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
+
+ default-neutral-direction -- which direction to choose if we're in
+ the middle of the staff
+
+ thickness -- weight of beams, in staffspace
+
+ space-function -- function of type multiplicity -> real (in staffspace)
+
+ beamed-stem-shorten --
+
+ height-quants --
+
+ vertical-position-quant-function --
+
+ dir-function --
+
+ damping -- damping factor (real).
+
+ outer-stem-length-limit -- catch suspect beam slopes, set slope to zero if
+ outer stem is lengthened more than this (in staffspace)
+
+ slope-limit -- set slope to zero if slope is running away steeper than this.
+*/
+class Beam
+{
public:
- /**
- The beams should be prevented to conflict with the stafflines,
- especially at small slopes.
- */
- enum Quantisation { NONE, NORMAL, TRADITIONAL, TEST };
- enum Dir_algorithm { /* DOWN=-1, UP=1, */ MAJORITY=2, MEAN, MEDIAN };
-
- Link_array<Stem> stems_;
- /// the slope of the beam in posns / point (dimension)
- Real slope_f_;
- /// the slope as solved; not quantised or damped
- Real solved_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
- Quantisation quantisation_;
- /// maximum number of beams (for opening-up of beam-spacing)
- int multiple_i_;
-
-
-
- Beam();
- void add_stem (Stem*);
-
- void set_grouping (Rhythmic_grouping def, Rhythmic_grouping current);
- void set_stemlens ();
- VIRTUAL_COPY_CONS(Score_element);
-
-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_element*, Score_element*);
-
- virtual void do_print() const;
-
- virtual void quantise_left_y (bool extend_b);
- virtual Molecule stem_beams (Stem *here, Stem *next, Stem *prev) const;
- virtual void solve_slope ();
- virtual void quantise_dy ();
- virtual Molecule*do_brew_molecule_p () const;
+ static int visible_stem_count (Score_element*);
+ static Item* first_visible_stem (Score_element*);
+ static Item* last_visible_stem (Score_element*);
+ static bool has_interface (Score_element*);
+ static void set_interface (Score_element*);
+ static Real rest_collision_callback (Score_element *,Axis);
+ Beam (SCM);
+ static void add_stem (Score_element*,Score_element*);
+ static void set_beaming (Score_element*,Beaming_info_list *);
+ static void set_stemlens (Score_element*);
+ static int get_multiplicity (Score_element*me);
+ static SCM brew_molecule (SCM);
+ static SCM before_line_breaking (SCM);
+ static SCM after_line_breaking (SCM);
+ static Molecule stem_beams (Score_element*,Item *here, Item *next, Item *prev);
+
+private:
+ static Direction get_default_dir (Score_element*);
+ static void set_stem_directions (Score_element*);
+ static void auto_knees (Score_element*);
+ static bool auto_knee (Score_element*,String gap_str, bool interstaff_b);
+ static void set_stem_shorten (Score_element*);
+ static void calc_default_position_and_height (Score_element*,Real* y, Real* dy);
+ static bool suspect_slope_b (Score_element*, Real y, Real dy);
+ static Real calc_slope_damping_f (Score_element*, Real dy);
+ static Real calc_stem_y_f (Score_element*, Item* s, Real y, Real dy);
+ static Real check_stem_length_f (Score_element*, Real y, Real dy);
+ static void set_stem_length (Score_element*, Real y, Real dy);
+ static Real quantise_dy_f (Score_element*, Real dy);
+ static Real quantise_y_f (Score_element*, Real y, Real dy, int quant_dir);
+ static int forced_stem_count (Score_element*);
};
#endif // BEAM_HH
projects / lilypond.git / blobdiff