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1 /*
2   beam.hh -- part of GNU LilyPond
3
4   (c) 1996--2002 Han-Wen Nienhuys
5 */
6
7 #ifndef BEAM_HH
8 #define BEAM_HH
9
10 #include "lily-proto.hh"
11 #include "lily-guile.hh"
12 #include "stem-info.hh"
13
14
15 class Beam
16 {
17 public:
18   static int visible_stem_count (Grob*);
19   static Grob* first_visible_stem (Grob*);
20   static Grob* last_visible_stem (Grob*);
21   static bool has_interface (Grob*);
22   DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM axis));
23   Beam (SCM);
24   static void add_stem (Grob*,Grob*);
25   static bool knee_b (Grob*);
26   static void set_beaming (Grob*,Beaming_info_list *);
27   static void set_stemlens (Grob*);
28   static int get_beam_count (Grob*me);
29   static Real get_beam_translation (Grob*me);
30   static void connect_beams (Grob*me);
31   DECLARE_SCHEME_CALLBACK (space_function, (SCM, SCM));
32   DECLARE_SCHEME_CALLBACK (brew_molecule, (SCM));
33   DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM));
34   DECLARE_SCHEME_CALLBACK (after_line_breaking, (SCM));
35   
36   /* position callbacks */
37   DECLARE_SCHEME_CALLBACK (least_squares, (SCM));
38   DECLARE_SCHEME_CALLBACK (check_concave, (SCM));
39   DECLARE_SCHEME_CALLBACK (slope_damping, (SCM));
40   DECLARE_SCHEME_CALLBACK (shift_region_to_valid, (SCM));  
41   DECLARE_SCHEME_CALLBACK (quanting, (SCM));
42   static Real score_slopes_dy (Grob*, Real,Real,Real,Real, bool);
43   static Real score_stem_lengths (Link_array<Grob>,
44                                   Array<Stem_info>,
45                                   Array<Real>, Array<Real>,
46                                   Real, Real,
47                                   bool,Grob*,Real , Real);
48   static Real score_forbidden_quants (Grob*, Real, Real,
49                                       Real, Real, Real, Real,
50                                       int, Direction, Direction);
51   
52   
53 private:
54   static Direction get_default_dir (Grob*);
55   static void set_stem_directions (Grob*, Direction );
56   static void consider_auto_knees (Grob*, Direction d);
57   static void set_stem_shorten (Grob*);
58   static Real calc_stem_y (Grob*, Grob* s, Grob**c,
59                            Real, Real,
60                            Interval pos, bool french);
61   static void set_stem_lengths (Grob*);
62   static int forced_stem_count (Grob*);
63 };
64
65 const int REGION_SIZE = 2;
66 #define DEBUG_QUANTING 0
67
68
69 #endif /* BEAM_HH */
70