#include <math.h>
#include <stdio.h>
-#include "line-of-score.hh"
+#include "system.hh"
+#include "paper-def.hh"
#include "paper-score.hh"
#include "paper-column.hh"
#include "item.hh"
#include "spring.hh"
#include "paper-column.hh"
#include "spaceable-grob.hh"
+#include "break-align-interface.hh"
+
+
+
/*
paper-column:
-
- Don't be confused by right-items: each spacing wish can also contain
- a number of items, with which a spacing constraint may be kept. It's
- a little baroque, but it might come in handy later on?
-
*/
class Spacing_spanner
{
static Real default_bar_spacing (Grob*,Grob*,Grob*,Moment);
static Real note_spacing (Grob*,Grob*,Grob*,Moment, bool*);
static Real get_duration_space (Grob*,Moment dur, Rational shortest, bool*);
- static Rational find_shortest (Link_array<Grob> const &);
+ static Rational find_shortest (Grob *, Link_array<Grob> const &);
static void breakable_column_spacing (Grob*, Item* l, Item *r, Moment);
static void find_loose_columns () {}
static void prune_loose_colunms (Grob*,Link_array<Grob> *cols, Rational);
static void do_measure (Rational, Grob*me,Link_array<Grob> *cols);
static void musical_column_spacing (Grob*,Item*,Item*, Real, Rational);
DECLARE_SCHEME_CALLBACK (set_springs, (SCM ));
+ static bool has_interface (Grob*);
};
/*
if (!l_neighbor || !r_neighbor)
return false;
+
+ /*
+ A rather hairy check, but we really only want to move around clefs. (anything else?)
+
+ in any case, we don't want to move bar lines.
+ */
+ for (SCM e = c->get_grob_property ("elements"); gh_pair_p (e); e = gh_cdr (e))
+ {
+ Grob * g = unsmob_grob (gh_car (e));
+ if (g && Break_align_interface::has_interface (g))
+ {
+ for (SCM s = g->get_grob_property ("elements"); gh_pair_p (s);
+ s = gh_cdr (s))
+ {
+ Grob *h = unsmob_grob (gh_car (s));
+
+ if (h && h->get_grob_property ("break-align-symbol") == ly_symbol2scm ("bar-line"))
+ return false;
+ }
+ }
+ }
+
/*
Only declare loose if the bounds make a little sense. This means
some cases (two isolated, consecutive clef changes) won't be
set_explicit_neighbor_columns (all);
- Rational global_shortest = find_shortest (all);
+ Rational global_shortest = find_shortest (me, all);
prune_loose_colunms (me, &all, global_shortest);
set_implicit_neighbor_columns (all);
*/
Rational
-Spacing_spanner::find_shortest (Link_array<Grob> const &cols)
+Spacing_spanner::find_shortest (Grob *me, Link_array<Grob> const &cols)
{
/*
ascending in duration
max_count = counts[i];
}
- // printf ("Den %d/%d, c %d\n", durations[i].num (), durations[i].den (), counts[i]);
+ // printf ("duration %d/%d, count %d\n", durations[i].num (), durations[i].den (), counts[i]);
}
- /*
- TODO: 1/8 should be adjustable?
- */
+ SCM bsd = me->get_grob_property ("base-shortest-duration");
Rational d = Rational (1,8);
+ if (Moment *m = unsmob_moment (bsd))
+ d = m->main_part_;
+
if (max_idx >= 0)
d = d <? durations[max_idx] ;
/*
- Generate the space between two musical columns LC and RC, given spacing parameters INCR and SHRTEST.
+ Generate the space between two musical columns LC and RC, given
+ spacing parameters INCR and SHORTEST.
*/
void
Spacing_spanner::musical_column_spacing (Grob *me, Item * lc, Item *rc, Real increment, Rational shortest)
max_note_space = max_note_space >? space;
max_fixed_note_space = max_fixed_note_space >? fixed;
}
-
}
if (max_note_space < 0)
{
max_note_space = base_note_space;
- max_fixed_note_space = increment;
+ max_fixed_note_space = increment;
}
- Spaceable_grob::add_spring (lc, rc, max_note_space, 1 / (max_note_space -max_fixed_note_space), expand_only);
+ bool ragged = to_boolean (me->paper_l ()->get_scmvar ("raggedright"));
+
+ /*
+ Whatever we do, the fixed space is smaller than the real
+ space.
+
+ TODO: this criterion is discontinuous in the derivative.
+ Maybe it should be continuous?
+ */
+ max_fixed_note_space = max_fixed_note_space <? max_note_space;
+
+ Real strength = (ragged) ? 1.0 : 1 / (max_note_space - max_fixed_note_space);
+ Real distance = (ragged) ? max_fixed_note_space : max_note_space;
+ // Spaceable_grob::add_spring (lc, rc, distance, strength, expand_only);
+
+ Spaceable_grob::add_spring (lc, rc, distance, strength, false);
}
+
+/*
+ The one-size-fits all spacing. It doesn't take into account
+ different spacing wishes from one to the next column.
+ */
void
Spacing_spanner::standard_breakable_column_spacing (Grob * me, Item*l, Item*r,
Real * fixed, Real * space,
-
+
if (isinf (max_space))
{
- programming_error ("No pref spacing found");
+ /*
+ One situation where this can happen is when there is a column
+ that only serves as a spanning point for a short staff-symbol.
+
+ ===============X===
+
+ |=======Y
+
+
+ (here no StaffSpacing from Y to X is found.)
+ */
+ programming_error ("No StaffSpacing wishes found");
max_space = 2.0;
max_fixed = 1.0;
}
works on all architectures.
*/
- Spaceable_grob::add_spring (l, r, max_space, 1/(max_space - max_fixed), false);
+ bool ragged = to_boolean (me->paper_l ()->get_scmvar ("raggedright"));
+ Real strength = (ragged) ? 1.0 : 1 / (max_space - max_fixed);
+ Real distance = (ragged) ? max_fixed : max_space;
+ Spaceable_grob::add_spring (l, r, distance, strength, false);
}
Spacing_spanner::get_duration_space (Grob*me, Moment d, Rational shortest, bool * expand_only)
{
Real k = gh_scm2double (me->get_grob_property ("shortest-duration-space"));
-
+ Real incr = gh_scm2double (me->get_grob_property ("spacing-increment"));
+
if (d < shortest)
{
+ /*
+ We don't space really short notes using the log of the
+ duration, since it would disproportionally stretches the long
+ notes in a piece. In stead, we use geometric spacing with constant 0.5
+ (i.e. linear.)
+
+ This should probably be tunable, to use other base numbers.
+
+ In Mozart hrn3 by EB., we have 8th note = 3.9 mm (total), 16th note =
+ 3.6 mm (total). head-width = 2.4, so we 1.2mm for 16th, 1.5
+ mm for 8th. (white space), suggesting that we use
+
+ (1.2 / 1.5)^{-log2(duration ratio)}
+
+
+ */
Rational ratio = d.main_part_ / shortest;
*expand_only = true;
- return (0.5 + 0.5 * double (ratio)) * k ;
+ return ((k-1) + double (ratio)) * incr;
}
else
{
/*
- @see
- John S. Gourlay. ``Spacing a Line of Music,'' Technical Report
- OSU-CISRC-10/87-TR35, Department of Computer and Information Science,
- The Ohio State University, 1987.
+ John S. Gourlay. ``Spacing a Line of Music,'' Technical
+ Report OSU-CISRC-10/87-TR35, Department of Computer and
+ Information Science, The Ohio State University, 1987.
*/
Real log = log_2 (shortest);
k -= log;
Rational compdur = d.main_part_ + d.grace_part_ /Rational (3);
*expand_only = false;
- return (log_2 (compdur) + k) * gh_scm2double (me->get_grob_property ("spacing-increment"));
+ return (log_2 (compdur) + k) * incr;
}
}
Moment delta_t = rwhen - lwhen;
Real dist = 0.0;
+ /*
+ In normal situations, the next column is at most
+ SHORTEST_PLAYING_LEN away. However chord-tremolos do funky faking stuff
+ with durations, invalidating this assumption. Here we kludge
+ around to get chord tremolos to behave properly.
+
+ */
+ shortest_playing_len = shortest_playing_len >? delta_t;
if (delta_t.main_part_ && !lwhen.grace_part_)
{
dist = get_duration_space (me, shortest_playing_len, shortest.main_part_, expand_only);
ADD_INTERFACE (Spacing_spanner,"spacing-spanner-interface",
- " SPACE = arithmetic_multiplier * ( C + log2 (TIME) ))
-The space taken by a note is determined by the formula
-
-
-
-where TIME is the amount of time a note occupies. The value of C is
-chosen such that the smallest space within a measure is
-arithmetic_basicspace:
-
-C = arithmetic_basicspace - log2 (mininum (SHORTEST, 1/8))
-
-The smallest space is the one following the shortest note in the
-measure, or the space following a hypothetical 1/8 note. Typically
-arithmetic_basicspace is set to a value so that the shortest note
-takes about two noteheads of space (ie, is followed by a notehead of
-space):
-
-@example
-2*quartwidth = arithmetic_multiplier * ( C + log2 (SHORTEST) ))
-
-@{ using: C = arithmetic_basicspace - log2 (mininum (SHORTEST, 1/8)) @}
-@{ assuming: SHORTEST <= 1/8 @}
-
-= arithmetic_multiplier *
-( arithmetic_basicspace - log2 (SHORTEST) + log2 (SHORTEST) )
-
-= arithmetic_multiplier * arithmetic_basicspace
-
-@{ choose: arithmetic_multiplier = 1.0*quartwidth (why?) @}
-
-= quartwidth * arithmetic_basicspace
-
-=>
-
-arithmetic_basicspace = 2/1 = 2
-
-
-If you want to space your music wider, use something like:
-
-arithmetic_basicspace = 4.;
-
-@end example",
- "spacing-increment shortest-duration-space");
+ "
+The space taken by a note is dependent on its duration. Doubling a
+duration adds spacing-increment to the space. The most common shortest
+note gets shortest-duration-space. Notes that are even shorter are
+spaced proportonial to their duration.
+
+Typically, the increment is the width of a black note head. In a
+piece with lots of 8th notes, and some 16th notes, the eighth note
+gets 2 note heads width (i.e. the space following a note is 1 note
+head width) A 16th note is followed by 0.5 note head width. The
+quarter note is followed by 3 NHW, the half by 4 NHW, etc.
+",
+ "grace-space-factor spacing-increment base-shortest-duration shortest-duration-space");
projects / lilypond.git / blobdiff