/*
beam.hh -- part of GNU LilyPond
- (c) 1996--1999 Han-Wen Nienhuys
+ source file of the LilyPond music typesetter
+
+ (c) 1996--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
#ifndef BEAM_HH
#define BEAM_HH
+#include "grob-interface.hh"
+#include "std-vector.hh"
#include "lily-proto.hh"
-#include "directional-spanner.hh"
#include "stem-info.hh"
+/*
+ TODO: move quanting in separate file.
+*/
+struct Beam_quant_parameters
+{
+ Real INTER_QUANT_PENALTY;
+ Real SECONDARY_BEAM_DEMERIT;
+ Real STEM_LENGTH_DEMERIT_FACTOR;
+ Real REGION_SIZE;
+
+ /*
+ threshold to combat rounding errors.
+ */
+ Real BEAM_EPS;
+
+ // possibly ridiculous, but too short stems just won't do
+ Real STEM_LENGTH_LIMIT_PENALTY;
+ Real DAMPING_DIRECTION_PENALTY;
+ Real MUSICAL_DIRECTION_FACTOR;
+ Real HINT_DIRECTION_PENALTY;
+ Real IDEAL_SLOPE_FACTOR;
+ Real ROUND_TO_ZERO_SLOPE;
+
+ void fill (Grob *him);
+};
-/** 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
-
-elt property:
+struct Beam_segment
+{
+ int vertical_count_;
+ Interval horizontal_;
+ Beam_segment ();
+};
-damping: amount of beam slope damping. (int)
+struct Beam_stem_segment
+{
+ Beam_stem_segment ();
+
+ Grob *stem_;
+ Real width_;
+ Real stem_x_;
+ int rank_;
+ vsize stem_index_;
+ bool gapped_;
+ Direction dir_;
+ int max_connect_;
+
+};
-should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
+bool operator <(Beam_stem_segment const &a, Beam_stem_segment const &b);
-*/
-class Beam : public Directional_spanner {
+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 (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 pos / slope be quantised? 0: no, 1: yes, 2: traditional
- JUNKME.
- */
- Quantisation quantisation_;
+ static int normal_stem_count (Grob *);
+ static Grob *first_normal_stem (Grob *);
+ static Grob *last_normal_stem (Grob *);
+ DECLARE_GROB_INTERFACE();
+ static void add_stem (Grob *, Grob *);
+ static bool is_cross_staff (Grob *);
+ static bool is_knee (Grob *);
+ static void set_beaming (Grob *, Beaming_pattern const *);
+ static void set_stemlens (Grob *);
+ static int get_beam_count (Grob *me);
+ static Real get_beam_translation (Grob *me);
+ static Real get_thickness (Grob *me);
+ static void connect_beams (Grob *me);
+ static vector<Beam_segment> get_beam_segments (Grob *me_grob, Grob **common);
+ static Interval no_visible_stem_positions (Grob *me, Interval default_value);
- /// maximum number of beams (for opening-up of beam-spacing)
- int multiple_i_;
-
- Array<Stem_info> sinfo_;
-
- Beam();
- void add_stem (Stem*);
- Stem_info get_stem_info (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;
- Direction get_default_dir () const;
- void set_direction (Direction);
- void set_steminfo ();
+ DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM prev_off));
+ DECLARE_SCHEME_CALLBACK (print, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_beaming, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_stem_shorten, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_direction, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_positions, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_least_squares_positions, (SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (calc_normal_stems, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_concaveness, (SCM));
+ DECLARE_SCHEME_CALLBACK (set_stem_lengths, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
+
+ /* position callbacks */
+ DECLARE_SCHEME_CALLBACK (shift_region_to_valid, (SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (slope_damping, (SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (quanting, (SCM, SCM));
- virtual void do_pre_processing ();
- virtual void do_post_processing ();
- virtual void do_substitute_element_pointer (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 calculate_slope ();
- virtual Real check_stemlengths_f (bool set_b);
- virtual void solve_slope ();
- virtual void quantise_dy ();
- virtual Molecule*do_brew_molecule_p () const;
+static Real score_slopes_dy (Real, Real, Real, Real, Real, bool, Beam_quant_parameters const *);
+
+ static Real score_stem_lengths (vector<Grob*> const &stems,
+ vector<Stem_info> const &stem_infos,
+ vector<Real> const &base_stem_ys,
+ vector<Real> const &stem_xs,
+ Real xl, Real xr,
+ bool knee,
+ Real yl, Real yr, Beam_quant_parameters const *);
+ static Real score_forbidden_quants (Real, Real,
+ Real, Real, Real, Real,
+ Drul_array<int>, Direction, Direction,
+ Beam_quant_parameters const *);
+
+ static int get_direction_beam_count (Grob *me, Direction d);
+private:
+ static Direction get_default_dir (Grob *);
+ static void set_stem_directions (Grob *, Direction);
+ static void consider_auto_knees (Grob *);
+ static void set_stem_shorten (Grob *);
+ static Real calc_stem_y (Grob *, Grob *s, Grob **c,
+ Real, Real, Direction,
+ Drul_array<Real> pos, bool french);
+ static int forced_stem_count (Grob *);
};
-#endif // BEAM_HH
+
+#endif /* BEAM_HH */
projects / lilypond.git / blobdiff