source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "timing-translator.hh"
{
Global_context *global = get_global_context ();
- /* allbars == ! skipbars */
- SCM sb = get_property ("skipBars");
- bool allbars = !to_boolean (sb);
-
- // urg: multi bar rests: should always process whole of first bar?
- SCM tim = get_property ("timing");
- bool timb = to_boolean (tim);
- if (timb && allbars)
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- Moment barleft = (measure_length () - measure_position ());
+ Moment barleft = (measure_length () - measure_position (context ()));
Moment now = now_mom ();
if (barleft > Moment (0)
/*
Hmm. We insert the bar moment every time we process a
moment. A waste of cpu?
- */
+ */
&& !now.grace_part_)
global->add_moment_to_process (now + barleft);
}
void
Timing_translator::initialize ()
{
-
- /*
- move this to engraver-init.ly?
- */
context ()->add_alias (ly_symbol2scm ("Timing"));
- context ()->set_property ("timing" , SCM_BOOL_T);
- context ()->set_property ("currentBarNumber" , scm_int2num (1));
+ context ()->set_property ("currentBarNumber", scm_from_int (1));
context ()->set_property ("timeSignatureFraction",
- scm_cons (scm_int2num (4), scm_int2num (4)));
+ scm_cons (scm_from_int (4), scm_from_int (4)));
/*
Do not init measurePosition; this should be done from global
context.
- */
- context ()->set_property ("measureLength", Moment (Rational (1)).smobbed_copy ());
- context ()->set_property ("beatLength", Moment (Rational (1,4)).smobbed_copy ());
+ */
+ context ()->set_property ("measureLength",
+ Moment (Rational (1)).smobbed_copy ());
+ context ()->set_property ("beatLength",
+ Moment (Rational (1, 4)).smobbed_copy ());
}
Rational
Timing_translator::Timing_translator ()
{
-
-}
-
-Moment
-Timing_translator::measure_position () const
-{
- SCM sm = get_property ("measurePosition");
-
- Moment m =0;
- if (unsmob_moment (sm))
- {
- m = *unsmob_moment (sm);
- while (m.main_part_ < Rational (0))
- m.main_part_ += measure_length ();
- }
-
- return m;
}
void
Timing_translator::start_translation_timestep ()
{
- Global_context *global =get_global_context ();
+ Global_context *global = get_global_context ();
Moment now = global->now_mom ();
- Moment dt = now - global->previous_moment ();
+ Moment dt = now - global->previous_moment ();
if (dt < Moment (0))
{
- programming_error ("Moving backwards in time");
+ programming_error ("moving backwards in time");
dt = 0;
}
else if (dt.main_part_.is_infinity ())
{
- programming_error ("Moving infinitely to future");
+ programming_error ("moving infinitely to future");
dt = 0;
}
-
+
if (!dt.to_bool ())
return;
SCM s = get_property ("measurePosition");
if (unsmob_moment (s))
- {
- measposp = *unsmob_moment (s);
- }
+ measposp = *unsmob_moment (s);
else
{
measposp = now;
context ()->set_property ("measurePosition",
measposp.smobbed_copy ());
}
-
+
measposp += dt;
-
+
SCM barn = get_property ("currentBarNumber");
int b = 0;
if (scm_is_number (barn))
- {
- b = scm_to_int (barn);
- }
+ b = scm_to_int (barn);
SCM cad = get_property ("timing");
- bool c= to_boolean (cad);
+ bool c = to_boolean (cad);
Rational len = measure_length ();
while (c && measposp.main_part_ >= len)
{
measposp.main_part_ -= len;
- b ++;
+ b++;
}
- context ()->set_property ("currentBarNumber", scm_int2num (b));
+ context ()->set_property ("currentBarNumber", scm_from_int (b));
context ()->set_property ("measurePosition", measposp.smobbed_copy ());
}
-ENTER_DESCRIPTION (Timing_translator,
- "This engraver adds the alias "
- "@code{Timing} to its containing context."
- ,
+#include "translator.icc"
+
+ADD_TRANSLATOR (Timing_translator,
+ "This engraver adds the alias "
+ "@code{Timing} to its containing context."
+ "Responsible for synchronizing timing information from staves. "
+ "Normally in @code{Score}. In order to create polyrhythmic music, "
+ "this engraver should be removed from @code{Score} and placed in "
+ "@code{Staff}. "
+ "\n\nThis engraver adds the alias @code{Timing} to its containing context.",
- "","","","","");
+ "", "", "", "");