-/*
- stem-tremolo.cc -- implement Stem_tremolo
-
+/*
+ stem-tremolo.cc -- implement Stem_tremolo
+
source file of the GNU LilyPond music typesetter
-
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "stem-tremolo.hh"
-#include "debug.hh"
+
+#include "spanner.hh"
#include "beam.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
-#include "stem.hh"
+#include "directional-element-interface.hh"
#include "item.hh"
+#include "lookup.hh"
+#include "output-def.hh"
#include "staff-symbol-referencer.hh"
-#include "directional-element-interface.hh"
-
-/*
- TODO:
- lengthen stem if necessary
- */
-
-void
-Stem_tremolo::set_interface (Score_element *me)
-{
- me->set_interface (ly_symbol2scm ("stem-tremolo"));
-}
+#include "stem.hh"
+#include "warn.hh"
-bool
-Stem_tremolo::has_interface (Score_element *me)
-{
- return me->has_interface (ly_symbol2scm ("stem-tremolo"));
-}
+/* TODO: lengthen stem if necessary */
-MAKE_SCHEME_CALLBACK(Stem_tremolo,dim_callback,2);
+MAKE_SCHEME_CALLBACK (Stem_tremolo, dim_callback, 1);
-/*
- todo: init with cons.
- */
+/* todo: init with cons. */
SCM
-Stem_tremolo::dim_callback (SCM e, SCM )
+Stem_tremolo::dim_callback (SCM e)
{
- Score_element * se = unsmob_element (e);
-
+ Grob *se = unsmob_grob (e);
+
Real space = Staff_symbol_referencer::staff_space (se);
- return ly_interval2scm ( Interval (-space, space));
+ return ly_interval2scm (Interval (-space, space));
}
+MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 1);
+SCM
+Stem_tremolo::height (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ /* TODO: fixme. uncached? */
+ return ly_interval2scm (me->get_stencil ()
+ ? me->get_stencil ()->extent (Y_AXIS)
+ : Interval());
+}
-MAKE_SCHEME_CALLBACK(Stem_tremolo,brew_molecule,1);
-SCM
-Stem_tremolo::brew_molecule (SCM smob)
+Stencil
+Stem_tremolo::raw_stencil (Grob *me)
{
- Score_element *me= unsmob_element (smob);
- Score_element * stem = unsmob_element (me->get_elt_property ("stem"));
- Score_element * beam = Stem::beam_l (stem);
-
- Real dydx;
- if (beam)
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
+
+ SCM slope = me->get_property ("slope");
+ Real dydx = 0.25;
+ if (scm_is_number (slope))
{
- Real dy = 0;
- SCM s = beam->get_elt_property ("height");
- if (gh_number_p (s))
- dy = gh_scm2double (s);
- Real dx = Beam::last_visible_stem (beam)->relative_coordinate (0, X_AXIS)
- - Beam::first_visible_stem (beam)->relative_coordinate (0, X_AXIS);
- dydx = dx ? dy/dx : 0;
+ dydx = robust_scm2double (slope, 0.0);
}
else
- // urg
- dydx = 0.25;
+ {
+ if (beam)
+ {
+ Real dy = 0;
+ SCM s = beam->get_property ("positions");
+ if (is_number_pair (s))
+ dy = - scm_to_double (scm_car (s)) + scm_to_double (scm_cdr (s));
+
+ Real dx = Beam::last_visible_stem (beam)->relative_coordinate (0, X_AXIS)
+ - Beam::first_visible_stem (beam)->relative_coordinate (0, X_AXIS);
+ dydx = dx ? dy / dx : 0;
+ }
+ }
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real thick = robust_scm2double (me->get_property ("beam-thickness"), 1);
+ Real width = robust_scm2double (me->get_property ("beam-width"), 1);
+ Real blot = me->layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
- Real ss = Staff_symbol_referencer::staff_space (stem);
- Real thick = gh_scm2double (me->get_elt_property ("beam-thickness"));
- Real width = gh_scm2double (me->get_elt_property ("beam-width"));
width *= ss;
thick *= ss;
-
- Molecule a (Lookup::beam (dydx, width, thick));
- a.translate (Offset (-width/2, width / 2 * dydx));
-
- int tremolo_flags;
- SCM s = me->get_elt_property ("tremolo-flags");
- if (gh_number_p (s))
- tremolo_flags = gh_scm2int (s);
- else
- // huh?
- tremolo_flags = 1;
- int mult = beam ? Beam::get_multiplicity (beam) : 0;
- SCM space_proc = me->get_elt_property ("beam-space-function");
- SCM space = gh_call1 (space_proc, gh_int2scm (mult));
- Real interbeam_f = gh_scm2double (space) * ss;
+ Stencil a (Lookup::beam (dydx, width, thick, blot));
+ a.translate (Offset (-width * 0.5, width * 0.5 * dydx));
+ int tremolo_flags = 0;
+ SCM s = me->get_property ("flag-count");
+ if (scm_is_number (s))
+ tremolo_flags = scm_to_int (s);
- Molecule mol;
- for (int i = 0; i < tremolo_flags; i++)
+ if (!tremolo_flags)
{
- Molecule b (a);
- b.translate_axis (interbeam_f * i, Y_AXIS);
- mol.add_molecule (b);
+ programming_error ("no tremolo flags");
+
+ me->suicide ();
+ return Stencil ();
}
- if (tremolo_flags)
- mol.translate_axis (-mol.extent (Y_AXIS).center (), Y_AXIS);
- if (beam)
+
+ /* Who the fuck is 0.81 ? --hwn. */
+ Real beam_translation = beam ? Beam::get_beam_translation (beam) : 0.81;
+
+ Stencil mol;
+ for (int i = 0; i < tremolo_flags; i++)
{
- // ugh, rather calc from Stem_tremolo_req
- int beams_i = Stem::beam_count(stem, RIGHT) >? Stem::beam_count (stem, LEFT);
- mol.translate (Offset(stem->relative_coordinate (0, X_AXIS) - me->relative_coordinate (0, X_AXIS),
- Stem::stem_end_position (stem ) * ss / 2 -
- Directional_element_interface::get (beam) * beams_i * interbeam_f));
- }
- else
- {
- /*
- Beams should intersect one beamthickness below stem end
- */
- Real dy = Stem::stem_end_position (stem ) * ss / 2;
- dy -= mol.extent (Y_AXIS).length () / 2 * Stem::get_direction (stem );
-
- /*
- uhg. Should use relative coords and placement
- */
- Real whole_note_correction;
- if (Stem::invisible_b (stem ))
- {
- Score_element *hed = Stem::support_head (stem );
- whole_note_correction = -Stem::get_direction (stem )
- *hed->extent (hed, X_AXIS).length () / 2;
- }
- else
- whole_note_correction = 0;
-
- mol.translate (Offset (stem->relative_coordinate (0, X_AXIS) - me->relative_coordinate (0, X_AXIS) +
- whole_note_correction, dy));
+ Stencil b (a);
+ b.translate_axis (beam_translation * i, Y_AXIS);
+ mol.add_stencil (b);
}
-
- return mol.create_scheme();
+ return mol;
}
-
-void
-Stem_tremolo::set_stem (Score_element*me,Score_element *s)
+MAKE_SCHEME_CALLBACK (Stem_tremolo, print, 1);
+SCM
+Stem_tremolo::print (SCM grob)
{
- me->set_elt_property ("stem", s->self_scm ());
+ Grob *me = unsmob_grob (grob);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ if (!stem)
+ {
+ programming_error ("no stem for stem-tremolo");
+ return SCM_EOL;
+ }
+
+ Spanner *beam = Stem::get_beam (stem);
+ Direction stemdir = get_grob_direction (stem);
+ if (stemdir == 0)
+ stemdir = UP;
+
+ Real beam_translation
+ = (beam && beam->is_live ())
+ ? Beam::get_beam_translation (beam)
+ : 0.81;
+
+ Stencil mol = raw_stencil (me);
+ Interval mol_ext = mol.extent (Y_AXIS);
+ Real ss = Staff_symbol_referencer::staff_space (me);
+
+ // ugh, rather calc from Stem_tremolo_req
+ int beam_count = beam ? (Stem::beam_multiplicity (stem).length () + 1) : 0;
+
+ Real beamthickness = 0.0;
+ SCM sbt = (beam) ? beam->get_property ("thickness") : SCM_EOL;
+ if (scm_is_number (sbt))
+ beamthickness = scm_to_double (sbt) * ss;
+
+ Real end_y
+ = Stem::stem_end_position (stem) * ss / 2
+ - stemdir * (beam_count * beamthickness
+ + (max (beam_count -1, 0) * beam_translation));
+
+ /* FIXME: the 0.33 ss is to compensate for the size of the note head. */
+ Real chord_start_y = Stem::chord_start_y (stem) + 0.33 * ss * stemdir;
+
+ Real padding = beam_translation;
+
+ /* if there is a flag, just above/below the notehead.
+ if there is not enough space, center on remaining space,
+ else one beamspace away from stem end. */
+ if (!beam && Stem::duration_log (stem) >= 3)
+ {
+ mol.align_to (Y_AXIS, -stemdir);
+ mol.translate_axis (chord_start_y + 0.5 * stemdir, Y_AXIS);
+ }
+ else if (stemdir * (end_y - chord_start_y) - 2 * padding - mol_ext.length ()
+ < 0.0)
+ mol.translate_axis (0.5 * (end_y + chord_start_y) - mol_ext.center (),
+ Y_AXIS);
+ else
+ mol.translate_axis (end_y - stemdir * beam_translation -mol_ext [stemdir],
+ Y_AXIS);
+
+ return mol.smobbed_copy ();
}
+ADD_INTERFACE (Stem_tremolo, "stem-tremolo-interface",
+ "A beam slashing a stem to indicate a tremolo.",
+ "stem "
+ "slope "
+ "beam-width "
+ "beam-thickness "
+ "flag-count");
projects / lilypond.git / blobdiff