#include "item.hh"
#include "spanner.hh"
#include "warn.hh"
+#include "text-item.hh" // debug output.
+#include "font-interface.hh" // debug output.
+
+
+
+Real
+shrink_extra_weight(Real x)
+{
+ return fabs(x) * ((x < 0) ? 1.5 : 1.0);
+}
+
void
Beam::add_stem (Grob *me, Grob *s)
total[d] += current;
count[d] ++;
}
-
} while (flip (&d) != DOWN);
SCM func = me->get_grob_property ("dir-function");
return SCM_UNSPECIFIED;
}
+struct Quant_score
+{
+ Real yl;
+ Real yr;
+ Real demerits;
+};
+
+
+MAKE_SCHEME_CALLBACK (Beam, new_quanting, 1);
+SCM
+Beam::new_quanting (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ SCM s = me->get_grob_property ("positions");
+ Real yl = gh_scm2double (gh_car(s));
+ Real yr = gh_scm2double (gh_cdr(s));
+
+ Real thick = gh_scm2double (me->get_grob_property ("thickness"));
+ // Staff_symbol_referencer::staff_space (me);
+ Real sthick = me->paper_l()->get_var ("stafflinethickness");
+ // * Staff_symbol_referencer::staff_space (me);
+
+ Real quants [] = {0.0, thick/2 - sthick / 2, 0.5, 1.0 - thick/2 + sthick/2};
+ int num_quants = int(sizeof(quants)/sizeof (Real));
+ Array<Real> quantsl;
+ Array<Real> quantsr;
+
+ const int REGION_SIZE = 3;
+
+ for (int i = -REGION_SIZE ; i < REGION_SIZE; i++)
+ for (int j = 0; j < num_quants; j++)
+ {
+ quantsl.push (i + quants[j] + int (yl));
+ quantsr.push (i + quants[j] + int (yr));
+ }
+
+ Array<Quant_score> qscores;
+
+ for(int l =0; l < quantsl.size(); l++)
+ for(int r =0; r < quantsr.size(); r++)
+ {
+ Quant_score qs;
+ qs.yl = quantsl[l];
+ qs.yr = quantsr[r];
+ qs.demerits = 0.0;
+
+ qscores.push (qs);
+ }
+
+
+ SCM score_funcs = me->get_grob_property("quant-score-functions");
+ for (SCM s = score_funcs; gh_pair_p (s); s = gh_cdr (s))
+ {
+ SCM f = gh_car (s);
+ for (int i = qscores.size(); i--;)
+ {
+ if (qscores[i].demerits < 1000)
+ {
+ SCM score = gh_call3 (f,
+ me->self_scm(),
+ gh_double2scm (qscores[i].yl),
+ gh_double2scm (qscores[i].yr));
+
+ qscores[i].demerits += gh_scm2double (score);
+ }
+ }
+ }
+
+ Real best = 1e6;
+ int best_idx = -1;
+ for (int i = qscores.size(); i--;)
+ {
+ if (qscores[i].demerits < best)
+ {
+ best = qscores [i].demerits ;
+ best_idx = i;
+ }
+ }
+
+
+ me->set_grob_property ("positions",
+ gh_cons (gh_double2scm (qscores[best_idx].yl),
+ gh_double2scm (qscores[best_idx].yr))
+ );
+ me->set_grob_property ("quant-score",gh_double2scm (qscores[best_idx].demerits));
+
+ return SCM_UNSPECIFIED;
+}
+
+MAKE_SCHEME_CALLBACK (Beam, score_slopes_dy, 3);
+SCM
+Beam::score_slopes_dy (SCM smob, SCM syl, SCM syr)
+{
+ Grob*me = unsmob_grob(smob);
+ Real yl = gh_scm2double (syl);
+ Real yr = gh_scm2double (syr);
+ Real dy = yr - yl;
+
+ SCM sdy = me->get_grob_property("least-squares-dy");
+ SCM posns = me->get_grob_property ("positions");
+
+ Real dy_mus = gh_number_p (sdy) ? gh_scm2double (sdy) : 0.0;
+ Real dy_damp = - gh_scm2double (gh_car(posns)) + gh_scm2double (gh_cdr (posns));
+
+ Real dem = 0.0;
+ if (sign (dy_damp) != sign (dy))
+ {
+ dem += 800;
+ }
+
+ dem += 400* (0 >? (fabs(dy) - fabs(dy_mus)));
+
+
+ dem += shrink_extra_weight (fabs (dy_damp) - fabs(dy))* 10;
+ return gh_double2scm (dem);
+}
+
+MAKE_SCHEME_CALLBACK (Beam, score_stem_lengths, 3);
+SCM
+Beam::score_stem_lengths (SCM smob, SCM syl, SCM syr)
+{
+ Grob*me = unsmob_grob(smob);
+ Real yl = gh_scm2double (syl);
+ Real yr = gh_scm2double (syr);
+
+ Link_array<Item> stems=
+ Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
+
+ Real demerit_score = 0.0 ;
+
+ for (int i=0; i < stems.size (); i++)
+ {
+ Item* s = stems[i];
+ if (Stem::invisible_b (s))
+ continue;
+
+ Real current_y = calc_stem_y_f (me, s, Interval(yl,yr));
+ Stem_info info = Stem::calc_stem_info (s);
+ Direction d = Directional_element_interface::get (s);
+
+ demerit_score += 500 * ( 0 >? (info.miny_f_ - d*current_y));
+ demerit_score += 500 * ( 0 >? (d * current_y - info.maxy_f_));
+
+ demerit_score += 5 * shrink_extra_weight (d * current_y - info.idealy_f_);
+ }
+
+ demerit_score *= 2.0 /stems.size();
+
+ return gh_double2scm (demerit_score);
+}
+Real
+my_modf(Real x)
+{
+ return x - floor(x);
+}
+
+
+
+MAKE_SCHEME_CALLBACK (Beam, score_forbidden_quants, 3);
+SCM
+Beam::score_forbidden_quants (SCM smob, SCM syl, SCM syr)
+{
+ Grob*me = unsmob_grob(smob);
+ Real yl = gh_scm2double (syl);
+ Real yr = gh_scm2double (syr);
+ Real rad = Staff_symbol_referencer::staff_radius (me);
+ Real dem = 0.0;
+ if (fabs (yl) < 2*rad && fabs( my_modf(yl) - 0.5) < 1e-3)
+ dem += 1000;
+ if (fabs (yr) < 2*rad && fabs( my_modf(yr) - 0.5) < 1e-3)
+ dem += 1000;
+
+
+ int multiplicity = get_multiplicity (me);
+ // todo: use multiplicity of outer stems.
+ if (multiplicity >= 2)
+ {
+ Real slt = me->paper_l()->get_var("stafflinethickness");
+ Real ss = Staff_symbol_referencer::staff_space(me);
+ Real thickness = gh_scm2double (me->get_grob_property ("thickness")) * ss;
+
+ Real beam_space= (2*ss + slt - 3 *thickness) / 2.0;
+ if (multiplicity >= 4)
+ {
+ beam_space = (3*ss + slt - 4 * thickness) /3.0;
+ }
+
+ Direction d = Directional_element_interface::get (me);
+ yl += d * (beam_space + thickness);
+ yr += d * (beam_space + thickness);
+ if (fabs (yl) < rad && fabs( my_modf(yl) - 0.5) < 0.1)
+ dem += 15;
+ if (fabs (yr) < rad && fabs( my_modf(yr) - 0.5) < 0.1)
+ dem += 15;
+ }
+
+ return gh_double2scm ( dem);
+}
+
+
MAKE_SCHEME_CALLBACK (Beam, least_squares, 1);
SCM
Interval ideal (Stem::calc_stem_info (first_visible_stem (me)).idealy_f_,
Stem::calc_stem_info (last_visible_stem (me)).idealy_f_);
+
if (!ideal.delta ())
{
Interval chord (Stem::chord_start_f (first_visible_stem (me)),
Stem::chord_start_f (last_visible_stem (me)));
-
+
+
+ /*
+ TODO : use scoring for this.
+
+ complicated, because we take stem-info.ideal for determining
+ beam slopes.
+
+ */
/* Make simple beam on middle line have small tilt */
if (!ideal[LEFT] && chord.delta () && count == 2)
{
pos[-d] = - pos[d];
}
else
- pos = ideal;
+ {
+ pos = ideal;
+ pos[LEFT] *= dir ;
+ pos[RIGHT] *= dir ;
+ }
}
else
{
else if ((c = f - iv[MIN]) < 0)
concave += c;
}
- concave *= Directional_element_interface::get (me);
+
+ Direction dir = Directional_element_interface::get (me);
+ concave *= dir;
Real concaveness = concave / (stems.size () - 2);
/* ugh: this is the a kludge to get input/regression/beam-concave.ly
Interval pos = ly_scm2interval (me->get_grob_property ("positions"));
Real r = pos.linear_combination (0);
me->set_grob_property ("positions", ly_interval2scm (Interval (r, r)));
- me->remove_grob_property ("least-squares-dy");
+ me->set_grob_property ("least-squares-dy", gh_double2scm (0));
}
return SCM_UNSPECIFIED;
return SCM_UNSPECIFIED;
}
-
/* Prevent interference from stafflines. */
Interval
Beam::quantise_interval (Grob *me, Interval pos, Direction quant_dir)
return SCM_UNSPECIFIED;
}
+/*
+ Calculate the Y position of the stem-end, given the Y-left, Y-right
+ in POS, and for stem S.
+ */
Real
Beam::calc_stem_y_f (Grob *me, Item* s, Interval pos)
{
return leftbeams;
}
+
MAKE_SCHEME_CALLBACK (Beam, brew_molecule, 1);
SCM
Beam::brew_molecule (SCM smob)
->get_bound (LEFT)->relative_coordinate (0, X_AXIS),
X_AXIS);
+ if (0)
+ {
+ /*
+ This code prints the demerits for each beam. Perhaps this
+ should be switchable for those who want to twiddle with the
+ parameters.
+ */
+ SCM dem = me->get_grob_property ("quant-score");
+ Real s = gh_scm2double (dem);
+ String str = to_str (s);
+
+ SCM properties = Font_interface::font_alist_chain (me);
+
+ Molecule tm = Text_item::text2molecule (me, gh_str02scm (str.ch_C()), properties);
+ mol.add_at_edge (Y_AXIS, UP, tm, 5.0);
+ }
+
return mol.smobbed_copy ();
}
projects / lilypond.git / commitdiff