+#include "lily-proto.hh"
+#include "lily-guile.hh"
+#include "stem-info.hh"
+
+
+class Beam
+{
+public:
+ static int visible_stem_count (Grob*);
+ static Grob* first_visible_stem (Grob*);
+ static Grob* last_visible_stem (Grob*);
+ static bool has_interface (Grob*);
+ DECLARE_SCHEME_CALLBACK (rest_collision_callback, (SCM element, SCM axis));
+ Beam (SCM);
+ static void add_stem (Grob*,Grob*);
+ static bool knee_b (Grob*);
+ static void set_beaming (Grob*,Beaming_info_list *);
+ static void set_stemlens (Grob*);
+ static int get_beam_count (Grob*me);
+ static Real get_beam_translation (Grob*me);
+ static void connect_beams (Grob*me);
+ DECLARE_SCHEME_CALLBACK (space_function, (SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (brew_molecule, (SCM));
+ DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM));
+ DECLARE_SCHEME_CALLBACK (after_line_breaking, (SCM));
+
+ /* position callbacks */
+ DECLARE_SCHEME_CALLBACK (least_squares, (SCM));
+ DECLARE_SCHEME_CALLBACK (check_concave, (SCM));
+ DECLARE_SCHEME_CALLBACK (slope_damping, (SCM));
+ DECLARE_SCHEME_CALLBACK (shift_region_to_valid, (SCM));
+ DECLARE_SCHEME_CALLBACK (quanting, (SCM));
+ static Real score_slopes_dy (Real, Real, Real, Real, bool);
+ static Real score_stem_lengths (Link_array<Grob>,
+ Array<Stem_info>,
+ Array<Real>, Array<Real>,
+ Real, Real, bool, Real, Real);
+ static Real score_forbidden_quants (Real, Real,
+ Real, Real, Real, Real,
+ int, Direction, Direction);
+
+