-/*
- stem-tremolo.cc -- implement Stem_tremolo
-
+/*
+ stem-tremolo.cc -- implement Stem_tremolo
+
source file of the GNU LilyPond music typesetter
-
- (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "stem-tremolo.hh"
-#include "warn.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
- */
-MAKE_SCHEME_CALLBACK (Stem_tremolo,dim_callback,2);
+#include "stem.hh"
+#include "warn.hh"
-/*
- todo: init with cons.
- */
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_slope, 1)
SCM
-Stem_tremolo::dim_callback (SCM e, SCM)
+Stem_tremolo::calc_slope (SCM smob)
{
- Grob * se = unsmob_grob (e);
-
- Real space = Staff_symbol_referencer::staff_space (se);
- return ly_interval2scm (Interval (-space, space));
+ Grob *me = unsmob_grob (smob);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
+
+ if (beam)
+ {
+ Real dy = 0;
+ SCM s = beam->get_property ("quantized-positions");
+ if (is_number_pair (s))
+ dy = - scm_to_double (scm_car (s)) + scm_to_double (scm_cdr (s));
+
+ Grob *s2 = Beam::last_normal_stem (beam);
+ Grob *s1 = Beam::first_normal_stem (beam);
+
+ Grob *common = s1->common_refpoint (s2, X_AXIS);
+ Real dx = s2->relative_coordinate (common, X_AXIS) -
+ s1->relative_coordinate (common, X_AXIS);
+
+ return scm_from_double (dx ? dy / dx : 0);
+ }
+ else
+ /* down stems with flags should have more sloped trems (helps avoid
+ flag/stem collisions without making the stem very long) */
+ return scm_from_double (
+ (Stem::duration_log (stem) >= 3 && get_grob_direction (stem) == DOWN) ?
+ 0.40 : 0.25);
}
-/*
- ugh ? --from Slur
- */
-MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 2);
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_width, 1)
SCM
-Stem_tremolo::height (SCM smob, SCM ax)
+Stem_tremolo::calc_width (SCM smob)
{
- Axis a = (Axis)gh_scm2int (ax);
- Grob * me = unsmob_grob (smob);
- assert (a == Y_AXIS);
-
- SCM mol = me->get_uncached_molecule ();
+ Grob *me = unsmob_grob (smob);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Direction stemdir = get_grob_direction (stem);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
- if (Molecule *m = unsmob_molecule (mol))
- return ly_interval2scm (m->extent (a));
- else
- return ly_interval2scm (Interval());
+ /* beamed stems and up-stems with flags have shorter tremolos */
+ return scm_from_double (((stemdir == UP && flag) || beam)? 1.0 : 1.5);
}
+MAKE_SCHEME_CALLBACK (Stem_tremolo, calc_style, 1)
+SCM
+Stem_tremolo::calc_style (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Direction stemdir = get_grob_direction (stem);
+ bool beam = Stem::get_beam (stem);
+ bool flag = Stem::duration_log (stem) >= 3 && !beam;
+
+ return ly_symbol2scm (((stemdir == UP && flag) || beam) ? "rectangle" : "default");
+}
-Molecule
-Stem_tremolo::raw_molecule (Grob *me)
+Real
+Stem_tremolo::get_beam_translation (Grob *me)
{
- Grob *stem = unsmob_grob (me->get_grob_property ("stem"));
- Grob *beam = Stem::get_beam (stem);
-
- Real dydx;
- if (beam)
- {
- 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;
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ Spanner *beam = Stem::get_beam (stem);
+
+ return (beam && beam->is_live ())
+ ? Beam::get_beam_translation (beam)
+ : (Staff_symbol_referencer::staff_space (me)
+ * robust_scm2double (me->get_property ("length-fraction"), 1.0) * 0.81);
+}
+Stencil
+Stem_tremolo::raw_stencil (Grob *me, Real slope, Direction stemdir)
+{
Real ss = Staff_symbol_referencer::staff_space (me);
- Real thick = robust_scm2double (me->get_grob_property ("beam-thickness"),1);
- Real width = robust_scm2double (me->get_grob_property ("beam-width"),1);
- Real blot = me->get_paper ()->get_realvar (ly_symbol2scm ("blotdiameter"));
+ 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 ("blot-diameter"));
+ SCM style = me->get_property ("style");
+ if (!scm_is_symbol (style))
+ style = ly_symbol2scm ("default");
width *= ss;
thick *= ss;
-
- Molecule a (Lookup::beam (dydx, width, thick, blot));
- a.translate (Offset (-width/2, width / 2 * dydx));
-
- int tremolo_flags = 0;
- SCM s = me->get_grob_property ("flag-count");
- if (gh_number_p (s))
- tremolo_flags = gh_scm2int (s);
+ Stencil a;
+ if (style == ly_symbol2scm ("rectangle"))
+ a = Lookup::rotated_box (slope, width, thick, blot);
+ else
+ a = Lookup::beam (slope, width, thick, blot);
+
+ a.align_to (X_AXIS, CENTER);
+ a.align_to (Y_AXIS, CENTER);
+
+ int tremolo_flags = robust_scm2int (me->get_property ("flag-count"), 0);
if (!tremolo_flags)
{
- programming_error ("No tremolo flags?");
+ programming_error ("no tremolo flags");
- me->suicide();
- return Molecule ();
+ me->suicide ();
+ return Stencil ();
}
- /*
- Who the fuck is 0.81 ?
-
- --hwn.
- */
- Real beam_translation = beam ? Beam::get_beam_translation (beam) : 0.81;
+ Real beam_translation = get_beam_translation (me);
- Molecule mol;
+ Stencil mol;
for (int i = 0; i < tremolo_flags; i++)
{
- Molecule b (a);
- b.translate_axis (beam_translation * i, Y_AXIS);
- mol.add_molecule (b);
+ Stencil b (a);
+ b.translate_axis (beam_translation * i * stemdir * -1, Y_AXIS);
+ mol.add_stencil (b);
}
return mol;
}
-MAKE_SCHEME_CALLBACK (Stem_tremolo,brew_molecule,1);
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, height, 1);
SCM
-Stem_tremolo::brew_molecule (SCM grob)
+Stem_tremolo::height (SCM smob)
{
- 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->live ())
- ? Beam::get_beam_translation (beam)
- : 0.81;
+ Grob *me = unsmob_grob (smob);
- Molecule mol = raw_molecule (me);
- Interval mol_ext = mol.extent (Y_AXIS);
- Real ss = Staff_symbol_referencer::staff_space (me);
+ /*
+ Cannot use the real slope, since it looks at the Beam.
+ */
+ Stencil s1 (translated_stencil (me, 0.35));
- // ugh, rather calc from Stem_tremolo_req
- int beam_count = (beam) ? (Stem::beam_multiplicity (stem).length () + 1): 0;
+ return ly_interval2scm (s1.extent (Y_AXIS));
+}
+
+MAKE_SCHEME_CALLBACK (Stem_tremolo, width, 1);
+SCM
+Stem_tremolo::width (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
/*
- TODO.
+ Cannot use the real slope, since it looks at the Beam.
*/
+ Stencil s1 (untranslated_stencil (me, 0.35));
+ return ly_interval2scm (s1.extent (X_AXIS));
+}
- Real beamthickness = 0.0;
- SCM sbt = (beam) ? beam->get_grob_property ("thickness") : SCM_EOL ;
- if (gh_number_p (sbt))
+Real
+Stem_tremolo::vertical_length (Grob *me)
+{
+ return untranslated_stencil (me, 0.35).extent (Y_AXIS).length ();
+}
+
+Stencil
+Stem_tremolo::untranslated_stencil (Grob *me, Real slope)
+{
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ if (!stem)
{
- beamthickness = gh_scm2double (sbt) * ss;
+ programming_error ("no stem for stem-tremolo");
+ return Stencil ();
}
- Real end_y
- = Stem::stem_end_position (stem) *ss/2
- - stemdir * (beam_count * beamthickness
- + ((beam_count -1) >? 0) * beam_translation);
+ Direction stemdir = get_grob_direction (stem);
+ if (!stemdir)
+ stemdir = UP;
- /*
- 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;
+ bool whole_note = Stem::duration_log (stem) <= 0;
- Real padding = beam_translation;
+ /* for a whole note, we position relative to the notehead, so we want the
+ stencil aligned on the flag closest to the head */
+ Direction stencil_dir = whole_note ? -stemdir : stemdir;
+ return raw_stencil (me, slope, stencil_dir);
+}
+
+
+Stencil
+Stem_tremolo::translated_stencil (Grob *me, Real slope)
+{
+ Stencil mol = untranslated_stencil (me, slope);
+
+ Grob *stem = unsmob_grob (me->get_object ("stem"));
+ if (!stem)
+ return Stencil ();
+
+ Direction stemdir = get_grob_direction (stem);
+ if (stemdir == 0)
+ stemdir = UP;
+
+ Spanner *beam = Stem::get_beam (stem);
+ Real beam_translation = get_beam_translation (me);
+
+ int beam_count = beam ? (Stem::beam_multiplicity (stem).length () + 1) : 0;
+ Real ss = Staff_symbol_referencer::staff_space (me);
+
+ Real end_y
+ = Stem::stem_end_position (stem) * ss / 2
+ - stemdir * max (beam_count, 1) * 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);
+ end_y -= stemdir * (Stem::duration_log (stem) - 2) * beam_translation;
+ if (stemdir == UP)
+ end_y -= stemdir * beam_translation * 0.5;
}
- else
+
+ bool whole_note = Stem::duration_log (stem) <= 0;
+ if (whole_note)
{
- mol.translate_axis (end_y - stemdir * beam_translation
- -mol_ext [stemdir]
- , Y_AXIS);
+ /* we shouldn't position relative to the end of the stem since the stem
+ is invisible */
+ vector<int> nhp = Stem::note_head_positions (stem);
+ Real note_head = (stemdir == UP ? nhp.back () : nhp[0]) * ss / 2;
+ end_y = note_head + stemdir * 1.5;
}
-
- return mol.smobbed_copy ();
-}
+ mol.translate_axis (end_y, Y_AXIS);
+ return mol;
+}
-void
-Stem_tremolo::set_stem (Grob*me,Grob *s)
+MAKE_SCHEME_CALLBACK (Stem_tremolo, print, 1);
+SCM
+Stem_tremolo::print (SCM grob)
{
- me->set_grob_property ("stem", s->self_scm ());
+ Grob *me = unsmob_grob (grob);
+
+ Stencil s = translated_stencil (me, robust_scm2double (me->get_property ("slope"), 0.25));
+ return s.smobbed_copy ();
}
+ADD_INTERFACE (Stem_tremolo,
+ "A beam slashing a stem to indicate a tremolo. The property"
+ " @code{style} can be @code{default} or @code{rectangle}.",
-ADD_INTERFACE (Stem_tremolo,"stem-tremolo-interface",
- "",
- "stem beam-width beam-thickness flag-count");
+ /* properties */
+ "beam-thickness "
+ "beam-width "
+ "flag-count "
+ "length-fraction "
+ "stem "
+ "style "
+ "slope "
+ );
projects / lilypond.git / blobdiff