/*
beam.hh -- part of GNU LilyPond
- (c) 1996--2000 Han-Wen Nienhuys
+ source file of the LilyPond music typesetter
+
+ (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
#ifndef BEAM_HH
#define BEAM_HH
#include "lily-proto.hh"
-#include "spanner.hh"
+#include "lily-guile.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;
-/** a beam connects multiple stems.
+ /*
+ threshold to combat rounding errors.
+ */
+ Real BEAM_EPS;
- Beam adjusts the stems its owns to make sure that they reach the
- beam and that point in the correct direction (urg?)
+ // possibly ridiculous, but too short stems just won't do
+ Real STEM_LENGTH_LIMIT_PENALTY;
+ Real DAMPING_DIRECTION_PENALTY;
+ Real MUSICAL_DIRECTION_FACTOR;
+ Real IDEAL_SLOPE_FACTOR;
+ Real ROUND_TO_ZERO_SLOPE;
- elt_properties:
- y-position: real (position of left edge)
- height: real (dy)
+ void fill (Grob *him);
+};
- damping: amount of beam slope damping. (int)
- should beam slope be damped? 0: no, 1: yes, 100000: horizontal beams
-*/
-class Beam : public Spanner
+class Beam
{
public:
- static SCM brew_molecule (SCM);
+ static int visible_stem_count (Grob *);
+ static Grob *first_visible_stem (Grob *);
+ static Grob *last_visible_stem (Grob *);
+ static bool has_interface (Grob *);
+ static void add_stem (Grob *, Grob *);
+ static bool is_knee (Grob *);
+ static void set_beaming (Grob *, Beaming_info_list 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);
+
+ 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_concaveness, (SCM));
+ DECLARE_SCHEME_CALLBACK (set_stem_lengths, (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));
+static Real score_slopes_dy (Real, Real, Real, Real, Real, bool, Beam_quant_parameters const *);
- 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;
- static Real rest_collision_callback (Score_element const*,Axis);
- 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;
+ static Real score_stem_lengths (Link_array<Grob> const &stems,
+ Array<Stem_info> const &stem_infos,
+ Array<Real> const &base_stem_ys,
+ Array<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 *);
-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;
+ static int get_direction_beam_count (Grob *me, Direction d);
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;
+ 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,
+ Drul_array<Real> pos, bool french);
+ static int forced_stem_count (Grob *);
};
-#endif // BEAM_HH
+#ifndef NDEBUG
+#define DEBUG_QUANTING 1
+#endif
+
+#endif /* BEAM_HH */
projects / lilypond.git / blobdiff