/*
- abbrev.cc -- implement Stem_tremolo
+ stem-tremolo.cc -- implement Stem_tremolo
source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "stem-tremolo.hh"
-#include "debug.hh"
+#include "warn.hh"
#include "beam.hh"
#include "paper-def.hh"
#include "lookup.hh"
#include "stem.hh"
-#include "offset.hh"
+#include "item.hh"
+#include "staff-symbol-referencer.hh"
+#include "directional-element-interface.hh"
-Stem_tremolo::Stem_tremolo ()
-{
- stem_l_ = 0;
- abbrev_flags_i_ = 1;
-}
+/*
+ TODO:
+ lengthen stem if necessary
+ */
+MAKE_SCHEME_CALLBACK (Stem_tremolo,dim_callback,2);
-void
-Stem_tremolo::do_print () const
+/*
+ todo: init with cons.
+ */
+SCM
+Stem_tremolo::dim_callback (SCM e, SCM)
{
- DEBUG_OUT << "abbrev_flags_i_ " << abbrev_flags_i_;
+ Grob * se = unsmob_grob (e);
+
+ Real space = Staff_symbol_referencer::staff_space (se);
+ return ly_interval2scm (Interval (-space, space));
}
-Interval
-Stem_tremolo::do_width () const
+/*
+ ugh ? --from Slur
+ */
+MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 2);
+SCM
+Stem_tremolo::height (SCM smob, SCM ax)
{
- Real space = stem_l_->staff_line_leading_f ();
- return Interval (-space, space);
-}
+ Axis a = (Axis)gh_scm2int (ax);
+ Grob * me = unsmob_grob (smob);
+ assert (a == Y_AXIS);
-void
-Stem_tremolo::do_pre_processing ()
-{
+ SCM mol = me->get_uncached_molecule ();
+
+ if (Molecule *m = unsmob_molecule (mol))
+ return ly_interval2scm (m->extent (a));
+ else
+ return ly_interval2scm (Interval());
}
-Molecule*
-Stem_tremolo::do_brew_molecule_p () const
+
+Molecule
+Stem_tremolo::raw_molecule (Grob *me)
{
- int mult =0;
- if (Beam * b = stem_l_->beam_l_)
+ Grob *stem = unsmob_grob (me->get_grob_property ("stem"));
+ Grob *beam = Stem::get_beam (stem);
+
+ Real dydx;
+ if (beam)
{
- Stem_info i = b->get_stem_info (stem_l_);
- mult = i.mult_i_;
+ Real dy = 0;
+ SCM s = beam->get_grob_property ("positions");
+ if (is_number_pair (s))
+ {
+ dy = -gh_scm2double (gh_car (s)) +gh_scm2double (gh_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;
}
+ else
+ // urg
+ dydx = 0.25;
+
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real thick = gh_scm2double (me->get_grob_property ("beam-thickness"));
+ Real width = gh_scm2double (me->get_grob_property ("beam-width"));
+ width *= ss;
+ thick *= ss;
- Real interbeam_f = paper_l ()->interbeam_f (mult);
- Real w = 1.5 * lookup_l ()->notehead (2, "").dim_[X_AXIS].length ();
- Real space = stem_l_->staff_line_leading_f ();
- Real internote_f = space/2;
+ Molecule a (Lookup::beam (dydx, width, thick));
+ a.translate (Offset (-width/2, width / 2 * dydx));
- Real beam_f = paper_l ()->beam_thickness_f ();
+ int tremolo_flags = 0;
+ SCM s = me->get_grob_property ("flag-count");
+ if (gh_number_p (s))
+ tremolo_flags = gh_scm2int (s);
+
+ if (!tremolo_flags)
+ {
+ programming_error ("No tremolo flags?");
- int beams_i = 0;
- Real slope_f = internote_f / 4 / internote_f; // HUH?
+ me->suicide();
+ return Molecule ();
+ }
- if (stem_l_ && stem_l_->beam_l_) {
- slope_f = stem_l_->beam_l_->slope_f_;
- // ugh, rather calc from Stem_tremolo_req
- beams_i = stem_l_->beams_i_drul_[RIGHT] >? stem_l_->beams_i_drul_[LEFT];
- }
- Real sl = slope_f * internote_f;
+ /*
+ Who the fuck is 0.81 ?
- Molecule a (lookup_l ()->beam (sl, w, beam_f));
- a.translate (Offset (-w/2, w / 2 * slope_f));
+ --hwn.
+ */
+ Real beam_translation = beam ? Beam::get_beam_translation (beam) : 0.81;
- Molecule *beams= new Molecule;
- for (int i = 0; i < abbrev_flags_i_; i++)
+ Molecule mol;
+ for (int i = 0; i < tremolo_flags; i++)
{
Molecule b (a);
- b.translate_axis (interbeam_f * i, Y_AXIS);
- beams->add_molecule (b);
+ b.translate_axis (beam_translation * i, Y_AXIS);
+ mol.add_molecule (b);
}
- beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
-
- if (stem_l_)
- {
- if (stem_l_->beam_l_)
- {
- beams->translate (Offset(stem_l_->hpos_f () - hpos_f (),
- stem_l_->stem_end_f () * internote_f -
- stem_l_->beam_l_->dir_ * beams_i * interbeam_f));
- }
- else
- {
- /*
- Beams should intersect one beamthickness below staff end
- */
- Real dy = - beams->extent ()[Y_AXIS].length () / 2 * stem_l_->dir_;
-
- /*
- uhg. Should use relative coords and placement
- */
- Real whole_note_correction = (stem_l_ && stem_l_->invisible_b( ))
- ? -stem_l_->get_dir () * stem_l_->note_delta_f ()/2
- : 0.0;
-
- /*
- UGH. Internote fudging.
- */
- dy /= internote_f;
- dy += stem_l_->stem_end_f ();
- dy *= internote_f;
- beams->translate (Offset(stem_l_->hpos_f () - hpos_f ()+
- whole_note_correction, dy));
- }
+ return mol;
+}
- /*
- there used to be half a page of code that was long commented out.
- Removed in 1.1.35
- */
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo,brew_molecule,1);
+SCM
+Stem_tremolo::brew_molecule (SCM grob)
+{
+ Grob *me = unsmob_grob (grob);
+ Grob *stem = unsmob_grob (me->get_grob_property ("stem"));
+ Grob *beam = Stem::get_beam (stem);
+ Direction stemdir = Stem::get_direction (stem);
+ Real beam_translation = beam ? Beam::get_beam_translation (beam) : 0.81;
+
+ Molecule mol = raw_molecule (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;
+
+ /*
+ TODO.
+ */
+
+
+ Real beamthickness = 0.0;
+ SCM sbt = (beam) ? beam->get_grob_property ("thickness") : SCM_EOL ;
+ if (gh_number_p (sbt))
+ {
+ beamthickness = gh_scm2double (sbt) * ss;
+ }
+
+ Real end_y
+ = Stem::stem_end_position (stem) *ss/2
+ - stemdir * (beam_count * beamthickness
+ + ((beam_count -1) >? 0) * beam_translation);
+
+ /*
+ 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 + .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 beams;
+ return mol.smobbed_copy ();
}
+
void
-Stem_tremolo::do_substitute_element_pointer (Score_element*o, Score_element*n)
+Stem_tremolo::set_stem (Grob*me,Grob *s)
{
- if (stem_l_ == o)
- stem_l_ = dynamic_cast<Stem*> (n);
+ me->set_grob_property ("stem", s->self_scm ());
}
-void
-Stem_tremolo::set_stem (Stem *s)
-{
- stem_l_ = s;
- add_dependency (s);
-}
+ADD_INTERFACE (Stem_tremolo,"stem-tremolo-interface",
+ "",
+ "stem beam-width beam-thickness flag-count");
projects / lilypond.git / blobdiff