#include "direction.hh"
#include "directional-element-interface.hh"
#include "grob.hh"
+#include "grob-array.hh"
+#include "item.hh"
#include "international.hh"
+#include "least-squares.hh"
#include "libc-extension.hh"
#include "main.hh"
+#include "note-head.hh"
#include "output-def.hh"
#include "pointer-group-interface.hh"
+#include "rhythmic-head.hh"
#include "staff-symbol-referencer.hh"
#include "stencil.hh"
#include "stem.hh"
Real
Beam_scoring_problem::y_at (Real x, Beam_configuration const *p) const
{
- return p->y[LEFT] + (x - x_span[LEFT]) * p->y.delta () / x_span.delta ();
+ return p->y[LEFT] + (x - x_span_[LEFT]) * p->y.delta () / x_span_.delta ();
}
/****************************************************************/
void Beam_scoring_problem::add_collision (Real x, Interval y,
Real score_factor)
{
- if (edge_dirs[LEFT] == edge_dirs[RIGHT])
+ if (edge_dirs_[LEFT] == edge_dirs_[RIGHT])
{
- Direction d = edge_dirs[LEFT];
+ Direction d = edge_dirs_[LEFT];
- Real quant_range_y = quant_range[LEFT][-d]
- + (x - x_span[LEFT]) * (quant_range[RIGHT][-d] - quant_range[LEFT][-d]) / x_span.delta ();
+ Real quant_range_y = quant_range_[LEFT][-d]
+ + (x - x_span_[LEFT]) * (quant_range_[RIGHT][-d] - quant_range_[LEFT][-d]) / x_span_.delta ();
if (d * (quant_range_y - minmax (d, y[UP], y[DOWN])) > 0)
{
for (vsize j = 0; j < segments_.size (); j++)
{
if (segments_[j].horizontal_.contains (x))
- c.beam_y_.add_point (segments_[j].vertical_count_ * beam_translation);
+ c.beam_y_.add_point (segments_[j].vertical_count_ * beam_translation_);
if (segments_[j].horizontal_[LEFT] > x)
break;
}
- c.beam_y_.widen (0.5 * beam_thickness);
+ c.beam_y_.widen (0.5 * beam_thickness_);
c.x_ = x;
- y *= 1 / staff_space;
+ y *= 1 / staff_space_;
c.y_ = y;
c.base_penalty_ = score_factor;
collisions_.push_back (c);
void Beam_scoring_problem::init_collisions (vector<Grob *> grobs)
{
Grob *common_x = NULL;
- segments_ = Beam::get_beam_segments (beam, &common_x);
+ segments_ = Beam::get_beam_segments (beam_, &common_x);
vector_sort (segments_, beam_segment_less);
- if (common[X_AXIS] != common_x)
+ if (common_[X_AXIS] != common_x)
{
programming_error ("Disagree on common x. Skipping collisions in beam scoring.");
return;
{
Box b;
for (Axis a = X_AXIS; a < NO_AXES; incr (a))
- b[a] = grobs[i]->extent (common[a], a);
+ b[a] = grobs[i]->extent (common_[a], a);
Real width = b[X_AXIS].length ();
- Real width_factor = sqrt (width / staff_space);
+ Real width_factor = sqrt (width / staff_space_);
Direction d = LEFT;
do
for (set<Grob *>::const_iterator it (stems.begin ()); it != stems.end (); it++)
{
Grob *s = *it;
- Real x = s->extent (common[X_AXIS], X_AXIS).center ();
+ Real x = s->extent (common_[X_AXIS], X_AXIS).center ();
Direction stem_dir = get_grob_direction (*it);
Interval y;
y.set_full ();
- y[-stem_dir] = Stem::chord_start_y (*it) + (*it)->relative_coordinate (common[Y_AXIS], Y_AXIS)
- - beam->relative_coordinate (common[Y_AXIS], Y_AXIS);
+ y[-stem_dir] = Stem::chord_start_y (*it) + (*it)->relative_coordinate (common_[Y_AXIS], Y_AXIS)
+ - beam_->relative_coordinate (common_[Y_AXIS], Y_AXIS);
- Real factor = parameters.STEM_COLLISION_FACTOR;
+ Real factor = parameters_.STEM_COLLISION_FACTOR;
if (!unsmob_grob (s->get_object ("beam")))
factor = 1.0;
add_collision (x, y, factor);
void Beam_scoring_problem::init_stems ()
{
- extract_grob_set (beam, "covered-grobs", collisions);
- extract_grob_set (beam, "stems", stems);
+ extract_grob_set (beam_, "covered-grobs", collisions);
+ extract_grob_set (beam_, "stems", stems);
for (int a = 2; a--;)
{
- common[a] = common_refpoint_of_array (stems, beam, Axis (a));
- common[a] = common_refpoint_of_array (collisions, common[a], Axis (a));
+ common_[a] = common_refpoint_of_array (stems, beam_, Axis (a));
+ common_[a] = common_refpoint_of_array (collisions, common_[a], Axis (a));
}
- Drul_array<Grob *> edge_stems (Beam::first_normal_stem (beam),
- Beam::last_normal_stem (beam));
+ Drul_array<Grob *> edge_stems (Beam::first_normal_stem (beam_),
+ Beam::last_normal_stem (beam_));
Direction d = LEFT;
do
- x_span[d] = edge_stems[d] ? edge_stems[d]->relative_coordinate (common[X_AXIS], X_AXIS) : 0.0;
+ x_span_[d] = edge_stems[d] ? edge_stems[d]->relative_coordinate (common_[X_AXIS], X_AXIS) : 0.0;
while (flip (&d) != LEFT);
Drul_array<bool> dirs_found (0, 0);
continue;
Stem_info si (Stem::get_stem_info (s));
- si.scale (1 / staff_space);
- stem_infos.push_back (si);
+ si.scale (1 / staff_space_);
+ stem_infos_.push_back (si);
dirs_found[si.dir_] = true;
bool f = to_boolean (s->get_property ("french-beaming"))
&& s != edge_stems[LEFT] && s != edge_stems[RIGHT];
- Real y = Beam::calc_stem_y (beam, s, common, x_span[LEFT], x_span[RIGHT], CENTER,
+ Real y = Beam::calc_stem_y (beam_, s, common_, x_span_[LEFT], x_span_[RIGHT], CENTER,
Interval (0, 0), f);
- base_lengths.push_back (y / staff_space);
- stem_xpositions.push_back (s->relative_coordinate (common[X_AXIS], X_AXIS));
+ base_lengths_.push_back (y / staff_space_);
+ stem_xpositions_.push_back (s->relative_coordinate (common_[X_AXIS], X_AXIS));
}
- edge_dirs = Drul_array<Direction> (CENTER, CENTER);
- if (stem_infos.size ())
+ edge_dirs_ = Drul_array<Direction> (CENTER, CENTER);
+ if (stem_infos_.size ())
{
- edge_dirs = Drul_array<Direction> (stem_infos[0].dir_,
- stem_infos.back ().dir_);
+ edge_dirs_ = Drul_array<Direction> (stem_infos_[0].dir_,
+ stem_infos_.back ().dir_);
}
- is_xstaff = Align_interface::has_interface (common[Y_AXIS]);
- is_knee = dirs_found[LEFT] && dirs_found[RIGHT];
+ is_xstaff_ = Align_interface::has_interface (common_[Y_AXIS]);
+ is_knee_ = dirs_found[LEFT] && dirs_found[RIGHT];
- staff_radius = Staff_symbol_referencer::staff_radius (beam);
- edge_beam_counts = Drul_array<int>
+ staff_radius_ = Staff_symbol_referencer::staff_radius (beam_);
+ edge_beam_counts_ = Drul_array<int>
(Stem::beam_multiplicity (stems[0]).length () + 1,
Stem::beam_multiplicity (stems.back ()).length () + 1);
- // TODO - why are we dividing by staff_space?
- beam_translation = Beam::get_beam_translation (beam) / staff_space;
+ // TODO - why are we dividing by staff_space_?
+ beam_translation_ = Beam::get_beam_translation (beam_) / staff_space_;
d = LEFT;
do
{
- quant_range[d].set_full ();
+ quant_range_[d].set_full ();
if (!edge_stems[d])
continue;
- Real stem_offset = edge_stems[d]->relative_coordinate (common[Y_AXIS], Y_AXIS)
- - beam->relative_coordinate (common[Y_AXIS], Y_AXIS);
- Interval heads = Stem::head_positions (edge_stems[d]) * 0.5 * staff_space;
+ Real stem_offset = edge_stems[d]->relative_coordinate (common_[Y_AXIS], Y_AXIS)
+ - beam_->relative_coordinate (common_[Y_AXIS], Y_AXIS);
+ Interval heads = Stem::head_positions (edge_stems[d]) * 0.5 * staff_space_;
- Direction ed = edge_dirs[d];
- heads.widen (0.5 * staff_space
- + (edge_beam_counts[d] - 1) * beam_translation + beam_thickness * .5);
- quant_range[d][-ed] = heads[ed] + stem_offset;
+ Direction ed = edge_dirs_[d];
+ heads.widen (0.5 * staff_space_
+ + (edge_beam_counts_[d] - 1) * beam_translation_ + beam_thickness_ * .5);
+ quant_range_[d][-ed] = heads[ed] + stem_offset;
}
while (flip (&d) != LEFT);
Beam_scoring_problem::Beam_scoring_problem (Grob *me, Drul_array<Real> ys)
{
- beam = me;
- unquanted_y = ys;
+ beam_ = me;
+ unquanted_y_ = ys;
/*
Calculations are relative to a unit-scaled staff, i.e. the quants are
- divided by the current staff_space.
+ divided by the current staff_space_.
*/
- staff_space = Staff_symbol_referencer::staff_space (me);
- beam_thickness = Beam::get_beam_thickness (me) / staff_space;
- line_thickness = Staff_symbol_referencer::line_thickness (me) / staff_space;
+ staff_space_ = Staff_symbol_referencer::staff_space (me);
+ beam_thickness_ = Beam::get_beam_thickness (me) / staff_space_;
+ line_thickness_ = Staff_symbol_referencer::line_thickness (me) / staff_space_;
// This is the least-squares DY, corrected for concave beams.
- musical_dy = robust_scm2double (me->get_property ("least-squares-dy"), 0);
+ musical_dy_ = robust_scm2double (me->get_property ("least-squares-dy"), 0);
- parameters.fill (me);
+ parameters_.fill (me);
init_stems ();
}
+// Assuming V is not empty, pick a 'reasonable' point inside V.
+static Real
+point_in_interval (Interval v, Real dist)
+{
+ if (isinf (v[DOWN]))
+ return v[UP] - dist;
+ else if (isinf (v[UP]))
+ return v[DOWN] + dist;
+ else
+ return v.center ();
+}
+
+/* Set stem's shorten property if unset.
+
+TODO:
+take some y-position (chord/beam/nearest?) into account
+scmify forced-fraction
+
+This is done in beam because the shorten has to be uniform over the
+entire beam.
+*/
+
+void
+set_minimum_dy (Grob *me, Real *dy)
+{
+ if (*dy)
+ {
+ /*
+ If dy is smaller than the smallest quant, we
+ get absurd direction-sign penalties.
+ */
+
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real beam_thickness = Beam::get_beam_thickness (me) / ss;
+ Real slt = Staff_symbol_referencer::line_thickness (me) / ss;
+ Real sit = (beam_thickness - slt) / 2;
+ Real inter = 0.5;
+ Real hang = 1.0 - (beam_thickness - slt) / 2;
+
+ *dy = sign (*dy) * max (fabs (*dy),
+ min (min (sit, inter), hang));
+ }
+}
+
+Interval
+Beam::no_visible_stem_positions (Grob *me, Interval default_value)
+{
+ extract_grob_set (me, "stems", stems);
+ if (stems.empty ())
+ return default_value;
+
+ Interval head_positions;
+ Slice multiplicity;
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ head_positions.unite (Stem::head_positions (stems[i]));
+ multiplicity.unite (Stem::beam_multiplicity (stems[i]));
+ }
+
+ Direction dir = get_grob_direction (me);
+
+ if (!dir)
+ programming_error ("The beam should have a direction by now.");
+
+ Real y = head_positions.linear_combination (dir)
+ * 0.5 * Staff_symbol_referencer::staff_space (me)
+ + dir * get_beam_translation (me) * (multiplicity.length () + 1);
+
+ y /= Staff_symbol_referencer::staff_space (me);
+ return Interval (y, y);
+}
+
+/*
+ Compute a first approximation to the beam slope.
+*/
+MAKE_SCHEME_CALLBACK (Beam, calc_least_squares_positions, 2);
+SCM
+Beam::calc_least_squares_positions (SCM smob, SCM /* posns */)
+{
+ Grob *me = unsmob_grob (smob);
+
+ int count = normal_stem_count (me);
+ Interval pos (0, 0);
+ if (count < 1)
+ return ly_interval2scm (no_visible_stem_positions (me, pos));
+
+ vector<Real> x_posns;
+ extract_grob_set (me, "normal-stems", stems);
+ Grob *commonx = common_refpoint_of_array (stems, me, X_AXIS);
+ Grob *commony = common_refpoint_of_array (stems, me, Y_AXIS);
+
+ Real my_y = me->relative_coordinate (commony, Y_AXIS);
+
+ Grob *fvs = first_normal_stem (me);
+ Grob *lvs = last_normal_stem (me);
+
+ Interval ideal (Stem::get_stem_info (fvs).ideal_y_
+ + fvs->relative_coordinate (commony, Y_AXIS) - my_y,
+ Stem::get_stem_info (lvs).ideal_y_
+ + lvs->relative_coordinate (commony, Y_AXIS) - my_y);
+
+ Real x0 = first_normal_stem (me)->relative_coordinate (commonx, X_AXIS);
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ Grob *s = stems[i];
+
+ Real x = s->relative_coordinate (commonx, X_AXIS) - x0;
+ x_posns.push_back (x);
+ }
+ Real dx = last_normal_stem (me)->relative_coordinate (commonx, X_AXIS) - x0;
+
+ Real y = 0;
+ Real slope = 0;
+ Real dy = 0;
+ Real ldy = 0.0;
+ if (!ideal.delta ())
+ {
+ Interval chord (Stem::chord_start_y (stems[0]),
+ Stem::chord_start_y (stems.back ()));
+
+ /* Simple beams (2 stems) on middle line should be allowed to be
+ slightly sloped.
+
+ However, if both stems reach middle line,
+ ideal[LEFT] == ideal[RIGHT] and ideal.delta () == 0.
+
+ For that case, we apply artificial slope */
+ if (!ideal[LEFT] && chord.delta () && count == 2)
+ {
+ /* FIXME. -> UP */
+ Direction d = (Direction) (sign (chord.delta ()) * UP);
+ pos[d] = get_beam_thickness (me) / 2;
+ pos[-d] = -pos[d];
+ }
+ else
+ pos = ideal;
+
+ /*
+ For broken beams this doesn't work well. In this case, the
+ slope esp. of the first part of a broken beam should predict
+ where the second part goes.
+ */
+ ldy = pos[RIGHT] - pos[LEFT];
+ }
+ else
+ {
+ vector<Offset> ideals;
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ Grob *s = stems[i];
+ ideals.push_back (Offset (x_posns[i],
+ Stem::get_stem_info (s).ideal_y_
+ + s->relative_coordinate (commony, Y_AXIS)
+ - my_y));
+ }
+
+ minimise_least_squares (&slope, &y, ideals);
+
+ dy = slope * dx;
+
+ set_minimum_dy (me, &dy);
+
+ ldy = dy;
+ pos = Interval (y, (y + dy));
+ }
+
+ /*
+ "position" is relative to the staff.
+ */
+ scale_drul (&pos, 1 / Staff_symbol_referencer::staff_space (me));
+
+ me->set_property ("least-squares-dy", scm_from_double (ldy));
+ return ly_interval2scm (pos);
+}
+
+/* This neat trick is by Werner Lemberg,
+ damped = tanh (slope)
+ corresponds with some tables in [Wanske] CHECKME */
+MAKE_SCHEME_CALLBACK (Beam, slope_damping, 2);
+SCM
+Beam::slope_damping (SCM smob, SCM posns)
+{
+ Grob *me = unsmob_grob (smob);
+ Drul_array<Real> pos = ly_scm2interval (posns);
+
+ if (normal_stem_count (me) <= 1)
+ return posns;
+
+ SCM s = me->get_property ("damping");
+ Real damping = scm_to_double (s);
+ Real concaveness = robust_scm2double (me->get_property ("concaveness"), 0.0);
+ if (concaveness >= 10000)
+ {
+ pos[LEFT] = pos[RIGHT];
+ me->set_property ("least-squares-dy", scm_from_double (0));
+ damping = 0;
+ }
+
+ if (damping)
+ {
+ scale_drul (&pos, Staff_symbol_referencer::staff_space (me));
+
+ Real dy = pos[RIGHT] - pos[LEFT];
+
+ Grob *fvs = first_normal_stem (me);
+ Grob *lvs = last_normal_stem (me);
+
+ Grob *commonx = fvs->common_refpoint (lvs, X_AXIS);
+
+ Real dx = last_normal_stem (me)->relative_coordinate (commonx, X_AXIS)
+ - first_normal_stem (me)->relative_coordinate (commonx, X_AXIS);
+
+ Real slope = dy && dx ? dy / dx : 0;
+
+ slope = 0.6 * tanh (slope) / (damping + concaveness);
+
+ Real damped_dy = slope * dx;
+
+ set_minimum_dy (me, &damped_dy);
+
+ pos[LEFT] += (dy - damped_dy) / 2;
+ pos[RIGHT] -= (dy - damped_dy) / 2;
+
+ scale_drul (&pos, 1 / Staff_symbol_referencer::staff_space (me));
+ }
+
+ return ly_interval2scm (pos);
+}
+
+/*
+ We can't combine with previous function, since check concave and
+ slope damping comes first.
+
+ TODO: we should use the concaveness to control the amount of damping
+ applied.
+*/
+MAKE_SCHEME_CALLBACK (Beam, shift_region_to_valid, 2);
+SCM
+Beam::shift_region_to_valid (SCM grob, SCM posns)
+{
+ Grob *me = unsmob_grob (grob);
+
+ /*
+ Code dup.
+ */
+ vector<Real> x_posns;
+ extract_grob_set (me, "stems", stems);
+ extract_grob_set (me, "covered-grobs", covered);
+
+ Grob *common[NO_AXES] = { me, me };
+ for (Axis a = X_AXIS; a < NO_AXES; incr (a))
+ {
+ common[a] = common_refpoint_of_array (stems, me, a);
+ common[a] = common_refpoint_of_array (covered, common[a], a);
+ }
+ Grob *fvs = first_normal_stem (me);
+
+ if (!fvs)
+ return posns;
+ Interval x_span;
+ x_span[LEFT] = fvs->relative_coordinate (common[X_AXIS], X_AXIS);
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ Grob *s = stems[i];
+
+ Real x = s->relative_coordinate (common[X_AXIS], X_AXIS) - x_span[LEFT];
+ x_posns.push_back (x);
+ }
+
+ Grob *lvs = last_normal_stem (me);
+ x_span[RIGHT] = lvs->relative_coordinate (common[X_AXIS], X_AXIS);
+
+ Drul_array<Real> pos = ly_scm2interval (posns);
+
+ scale_drul (&pos, Staff_symbol_referencer::staff_space (me));
+
+ Real beam_dy = pos[RIGHT] - pos[LEFT];
+ Real beam_left_y = pos[LEFT];
+ Real slope = x_span.delta () ? (beam_dy / x_span.delta ()) : 0.0;
+
+ /*
+ Shift the positions so that we have a chance of finding good
+ quants (i.e. no short stem failures.)
+ */
+ Interval feasible_left_point;
+ feasible_left_point.set_full ();
+
+ for (vsize i = 0; i < stems.size (); i++)
+ {
+ Grob *s = stems[i];
+ if (Stem::is_invisible (s))
+ continue;
+
+ Direction d = get_grob_direction (s);
+ Real left_y
+ = Stem::get_stem_info (s).shortest_y_
+ - slope * x_posns [i];
+
+ /*
+ left_y is now relative to the stem S. We want relative to
+ ourselves, so translate:
+ */
+ left_y
+ += + s->relative_coordinate (common[Y_AXIS], Y_AXIS)
+ - me->relative_coordinate (common[Y_AXIS], Y_AXIS);
+
+ Interval flp;
+ flp.set_full ();
+ flp[-d] = left_y;
+
+ feasible_left_point.intersect (flp);
+ }
+
+ vector<Grob *> filtered;
+ /*
+ We only update these for objects that are too large for quanting
+ to find a workaround. Typically, these are notes with
+ stems, and timesig/keysig/clef, which take out the entire area
+ inside the staff as feasible.
+
+ The code below disregards the thickness and multiplicity of the
+ beam. This should not be a problem, as the beam quanting will
+ take care of computing the impact those exactly.
+ */
+ Real min_y_size = 2.0;
+
+ // A list of intervals into which beams may not fall
+ vector<Interval> forbidden_intervals;
+
+ for (vsize i = 0; i < covered.size (); i++)
+ {
+ if (!covered[i]->is_live ())
+ continue;
+
+ if (Beam::has_interface (covered[i]) && is_cross_staff (covered[i]))
+ continue;
+
+ Box b;
+ for (Axis a = X_AXIS; a < NO_AXES; incr (a))
+ b[a] = covered[i]->extent (common[a], a);
+
+ if (b[X_AXIS].is_empty () || b[Y_AXIS].is_empty ())
+ continue;
+
+ if (intersection (b[X_AXIS], x_span).is_empty ())
+ continue;
+
+ filtered.push_back (covered[i]);
+ Grob *head_stem = Rhythmic_head::get_stem (covered[i]);
+ if (head_stem && Stem::is_normal_stem (head_stem)
+ && Note_head::has_interface (covered[i]))
+ {
+ if (Stem::get_beam (head_stem))
+ {
+ /*
+ We must assume that stems are infinitely long in this
+ case, as asking for the length of the stem typically
+ leads to circular dependencies.
+
+ This strategy assumes that we don't want to handle the
+ collision of beams in opposite non-forced directions
+ with this code, where shortening the stems of both
+ would resolve the problem, eg.
+
+ x x
+ | |
+ =====
+
+ =====
+ | |
+ x x
+
+ Such beams would need a coordinating grob to resolve
+ the collision, since both will likely want to occupy
+ the centerline.
+ */
+ Direction stemdir = get_grob_direction (head_stem);
+ b[Y_AXIS][stemdir] = stemdir * infinity_f;
+ }
+ else
+ {
+ // TODO - should we include the extent of the stem here?
+ }
+ }
+
+ if (b[Y_AXIS].length () < min_y_size)
+ continue;
+
+ Direction d = LEFT;
+ do
+ {
+ Real x = b[X_AXIS][d] - x_span[LEFT];
+ Real dy = slope * x;
+
+ Direction yd = DOWN;
+ Interval disallowed;
+ do
+ {
+ Real left_y = b[Y_AXIS][yd];
+
+ left_y -= dy;
+
+ // Translate back to beam as ref point.
+ left_y -= me->relative_coordinate (common[Y_AXIS], Y_AXIS);
+
+ disallowed[yd] = left_y;
+ }
+ while (flip (&yd) != DOWN);
+
+ forbidden_intervals.push_back (disallowed);
+ }
+ while (flip (&d) != LEFT);
+ }
+
+ Grob_array *arr
+ = Pointer_group_interface::get_grob_array (me,
+ ly_symbol2scm ("covered-grobs"));
+ arr->set_array (filtered);
+
+ vector_sort (forbidden_intervals, Interval::left_less);
+ Real epsilon = 1.0e-10;
+ Interval feasible_beam_placements (beam_left_y, beam_left_y);
+
+ /*
+ forbidden_intervals contains a vector of intervals in which
+ the beam cannot start. it iterates through these intervals,
+ pushing feasible_beam_placements epsilon over or epsilon under a
+ collision. when this type of change happens, the loop is marked
+ as "dirty" and re-iterated.
+
+ TODO: figure out a faster ways that this loop can happen via
+ a better search algorithm and/or OOP.
+ */
+
+ bool dirty = false;
+ do
+ {
+ dirty = false;
+ for (vsize i = 0; i < forbidden_intervals.size (); i++)
+ {
+ Direction d = DOWN;
+ do
+ {
+ if (forbidden_intervals[i][d] == d * infinity_f)
+ feasible_beam_placements[d] = d * infinity_f;
+ else if (forbidden_intervals[i].contains (feasible_beam_placements[d]))
+ {
+ feasible_beam_placements[d] = d * epsilon + forbidden_intervals[i][d];
+ dirty = true;
+ }
+ }
+ while (flip (&d) != DOWN);
+ }
+ }
+ while (dirty);
+
+ // if the beam placement falls out of the feasible region, we push it
+ // to infinity so that it can never be a feasible candidate below
+ Direction d = DOWN;
+ do
+ {
+ if (!feasible_left_point.contains (feasible_beam_placements[d]))
+ feasible_beam_placements[d] = d * infinity_f;
+ }
+ while (flip (&d) != DOWN);
+
+ if ((feasible_beam_placements[UP] == infinity_f && feasible_beam_placements[DOWN] == -infinity_f) && !feasible_left_point.is_empty ())
+ {
+ // We are somewhat screwed: we have a collision, but at least
+ // there is a way to satisfy stem length constraints.
+ beam_left_y = point_in_interval (feasible_left_point, 2.0);
+ }
+ else if (!feasible_left_point.is_empty ())
+ {
+ // Only one of them offers is feasible solution. Pick that one.
+ if (abs (beam_left_y - feasible_beam_placements[DOWN]) > abs (beam_left_y - feasible_beam_placements[UP]))
+ beam_left_y = feasible_beam_placements[UP];
+ else
+ beam_left_y = feasible_beam_placements[DOWN];
+ }
+ else
+ {
+ // We are completely screwed.
+ me->warning (_ ("no viable initial configuration found: may not find good beam slope"));
+ }
+
+ pos = Drul_array<Real> (beam_left_y, (beam_left_y + beam_dy));
+ scale_drul (&pos, 1 / Staff_symbol_referencer::staff_space (me));
+
+ return ly_interval2scm (pos);
+}
+
void
Beam_scoring_problem::generate_quants (vector<Beam_configuration *> *scores) const
{
- int region_size = (int) parameters.REGION_SIZE;
+ int region_size = (int) parameters_.REGION_SIZE;
// Knees and collisions are harder, lets try some more possibilities
- if (is_knee)
+ if (is_knee_)
region_size += 2;
if (collisions_.size ())
region_size += 2;
Real straddle = 0.0;
- Real sit = (beam_thickness - line_thickness) / 2;
+ Real sit = (beam_thickness_ - line_thickness_) / 2;
Real inter = 0.5;
- Real hang = 1.0 - (beam_thickness - line_thickness) / 2;
+ Real hang = 1.0 - (beam_thickness_ - line_thickness_) / 2;
Real base_quants [] = {straddle, sit, inter, hang};
int num_base_quants = int (sizeof (base_quants) / sizeof (Real));
for (vsize j = 0; j < unshifted_quants.size (); j++)
{
Beam_configuration *c
- = Beam_configuration::new_config (unquanted_y,
+ = Beam_configuration::new_config (unquanted_y_,
Interval (unshifted_quants[i],
unshifted_quants[j]));
Direction d = LEFT;
do
{
- if (!quant_range[d].contains (c->y[d]))
+ if (!quant_range_[d].contains (c->y[d]))
{
delete c;
c = NULL;
if (configs.empty ())
{
programming_error ("No viable beam quanting found. Using unquanted y value.");
- return unquanted_y;
+ return unquanted_y_;
}
Beam_configuration *best = NULL;
bool debug
- = to_boolean (beam->layout ()->lookup_variable (ly_symbol2scm ("debug-beam-scoring")));
- SCM inspect_quants = beam->get_property ("inspect-quants");
+ = to_boolean (beam_->layout ()->lookup_variable (ly_symbol2scm ("debug-beam-scoring")));
+ SCM inspect_quants = beam_->get_property ("inspect-quants");
if (scm_is_pair (inspect_quants))
{
debug = true;
}
string card = best->score_card_ + to_string (" c%d/%d", completed, configs.size ());
- beam->set_property ("annotation", ly_string2scm (card));
+ beam_->set_property ("annotation", ly_string2scm (card));
}
#endif
void
Beam_scoring_problem::score_stem_lengths (Beam_configuration *config) const
{
- Real limit_penalty = parameters.STEM_LENGTH_LIMIT_PENALTY;
+ Real limit_penalty = parameters_.STEM_LENGTH_LIMIT_PENALTY;
Drul_array<Real> score (0, 0);
Drul_array<int> count (0, 0);
- for (vsize i = 0; i < stem_xpositions.size (); i++)
+ for (vsize i = 0; i < stem_xpositions_.size (); i++)
{
- Real x = stem_xpositions[i];
- Real dx = x_span.delta ();
+ Real x = stem_xpositions_[i];
+ Real dx = x_span_.delta ();
Real beam_y = dx
- ? config->y[RIGHT] * (x - x_span[LEFT]) / dx + config->y[LEFT] * (x_span[RIGHT] - x) / dx
+ ? config->y[RIGHT] * (x - x_span_[LEFT]) / dx + config->y[LEFT] * (x_span_[RIGHT] - x) / dx
: (config->y[RIGHT] + config->y[LEFT]) / 2;
- Real current_y = beam_y + base_lengths[i];
- Real length_pen = parameters.STEM_LENGTH_DEMERIT_FACTOR;
+ Real current_y = beam_y + base_lengths_[i];
+ Real length_pen = parameters_.STEM_LENGTH_DEMERIT_FACTOR;
- Stem_info info = stem_infos[i];
+ Stem_info info = stem_infos_[i];
Direction d = info.dir_;
score[d] += limit_penalty * max (0.0, (d * (info.shortest_y_ - current_y)));
/* We introduce a power, to make the scoring strictly
convex. Otherwise a symmetric knee beam (up/down/up/down)
does not have an optimum in the middle. */
- if (is_knee)
+ if (is_knee_)
ideal_score = pow (ideal_score, 1.1);
score[d] += length_pen * ideal_score;
Beam_scoring_problem::score_slope_direction (Beam_configuration *config) const
{
Real dy = config->y.delta ();
- Real damped_dy = unquanted_y.delta ();
+ Real damped_dy = unquanted_y_.delta ();
Real dem = 0.0;
/*
DAMPING_DIRECTION_PENALTY is a very harsh measure, while for
{
if (!dy)
{
- if (fabs (damped_dy / x_span.delta ()) > parameters.ROUND_TO_ZERO_SLOPE)
- dem += parameters.DAMPING_DIRECTION_PENALTY;
+ if (fabs (damped_dy / x_span_.delta ()) > parameters_.ROUND_TO_ZERO_SLOPE)
+ dem += parameters_.DAMPING_DIRECTION_PENALTY;
else
- dem += parameters.HINT_DIRECTION_PENALTY;
+ dem += parameters_.HINT_DIRECTION_PENALTY;
}
else
- dem += parameters.DAMPING_DIRECTION_PENALTY;
+ dem += parameters_.DAMPING_DIRECTION_PENALTY;
}
config->add (dem, "Sd");
Beam_scoring_problem::score_slope_musical (Beam_configuration *config) const
{
Real dy = config->y.delta ();
- Real dem = parameters.MUSICAL_DIRECTION_FACTOR
- * max (0.0, (fabs (dy) - fabs (musical_dy)));
+ Real dem = parameters_.MUSICAL_DIRECTION_FACTOR
+ * max (0.0, (fabs (dy) - fabs (musical_dy_)));
config->add (dem, "Sm");
}
Beam_scoring_problem::score_slope_ideal (Beam_configuration *config) const
{
Real dy = config->y.delta ();
- Real damped_dy = unquanted_y.delta ();
+ Real damped_dy = unquanted_y_.delta ();
Real dem = 0.0;
- Real slope_penalty = parameters.IDEAL_SLOPE_FACTOR;
+ Real slope_penalty = parameters_.IDEAL_SLOPE_FACTOR;
/* Xstaff beams tend to use extreme slopes to get short stems. We
put in a penalty here. */
- if (is_xstaff)
+ if (is_xstaff_)
slope_penalty *= 10;
/* Huh, why would a too steep beam be better than a too flat one ? */
Beam_scoring_problem::score_horizontal_inter_quants (Beam_configuration *config) const
{
if (config->y.delta () == 0.0
- && abs (config->y[LEFT]) < staff_radius * staff_space)
+ && abs (config->y[LEFT]) < staff_radius_ * staff_space_)
{
- Real yshift = config->y[LEFT] - 0.5 * staff_space;
- if (fabs (my_round (yshift) - yshift) < 0.01 * staff_space)
- config->add (parameters.HORIZONTAL_INTER_QUANT_PENALTY, "H");
+ Real yshift = config->y[LEFT] - 0.5 * staff_space_;
+ if (fabs (my_round (yshift) - yshift) < 0.01 * staff_space_)
+ config->add (parameters_.HORIZONTAL_INTER_QUANT_PENALTY, "H");
}
}
{
Real dy = config->y.delta ();
- Real extra_demerit = parameters.SECONDARY_BEAM_DEMERIT
- / max (edge_beam_counts[LEFT], edge_beam_counts[RIGHT]);
+ Real extra_demerit = parameters_.SECONDARY_BEAM_DEMERIT
+ / max (edge_beam_counts_[LEFT], edge_beam_counts_[RIGHT]);
Direction d = LEFT;
Real dem = 0.0;
- Real eps = parameters.BEAM_EPS;
+ Real eps = parameters_.BEAM_EPS;
do
{
- for (int j = 1; j <= edge_beam_counts[d]; j++)
+ for (int j = 1; j <= edge_beam_counts_[d]; j++)
{
- Direction stem_dir = edge_dirs[d];
+ Direction stem_dir = edge_dirs_[d];
/*
The 2.2 factor is to provide a little leniency for
will be in the gap of the (2, sit) quant, leading to a
false demerit.
*/
- Real gap1 = config->y[d] - stem_dir * ((j - 1) * beam_translation + beam_thickness / 2 - line_thickness / 2.2);
- Real gap2 = config->y[d] - stem_dir * (j * beam_translation - beam_thickness / 2 + line_thickness / 2.2);
+ Real gap1 = config->y[d] - stem_dir * ((j - 1) * beam_translation_ + beam_thickness_ / 2 - line_thickness_ / 2.2);
+ Real gap2 = config->y[d] - stem_dir * (j * beam_translation_ - beam_thickness_ / 2 + line_thickness_ / 2.2);
Interval gap;
gap.add_point (gap1);
gap.add_point (gap2);
- for (Real k = -staff_radius;
- k <= staff_radius + eps; k += 1.0)
+ for (Real k = -staff_radius_;
+ k <= staff_radius_ + eps; k += 1.0)
if (gap.contains (k))
{
Real dist = min (fabs (gap[UP] - k), fabs (gap[DOWN] - k));
}
while ((flip (&d)) != LEFT);
- if (max (edge_beam_counts[LEFT], edge_beam_counts[RIGHT]) >= 2)
+ if (max (edge_beam_counts_[LEFT], edge_beam_counts_[RIGHT]) >= 2)
{
Real straddle = 0.0;
- Real sit = (beam_thickness - line_thickness) / 2;
+ Real sit = (beam_thickness_ - line_thickness_) / 2;
Real inter = 0.5;
- Real hang = 1.0 - (beam_thickness - line_thickness) / 2;
+ Real hang = 1.0 - (beam_thickness_ - line_thickness_) / 2;
Direction d = LEFT;
do
{
- if (edge_beam_counts[d] >= 2
- && fabs (config->y[d] - edge_dirs[d] * beam_translation) < staff_radius + inter)
+ if (edge_beam_counts_[d] >= 2
+ && fabs (config->y[d] - edge_dirs_[d] * beam_translation_) < staff_radius_ + inter)
{
// TODO up/down symmetry.
- if (edge_dirs[d] == UP && dy <= eps
+ if (edge_dirs_[d] == UP && dy <= eps
&& fabs (my_modf (config->y[d]) - sit) < eps)
dem += extra_demerit;
- if (edge_dirs[d] == DOWN && dy >= eps
+ if (edge_dirs_[d] == DOWN && dy >= eps
&& fabs (my_modf (config->y[d]) - hang) < eps)
dem += extra_demerit;
}
- if (edge_beam_counts[d] >= 3
- && fabs (config->y[d] - 2 * edge_dirs[d] * beam_translation) < staff_radius + inter)
+ if (edge_beam_counts_[d] >= 3
+ && fabs (config->y[d] - 2 * edge_dirs_[d] * beam_translation_) < staff_radius_ + inter)
{
// TODO up/down symmetry.
- if (edge_dirs[d] == UP && dy <= eps
+ if (edge_dirs_[d] == UP && dy <= eps
&& fabs (my_modf (config->y[d]) - straddle) < eps)
dem += extra_demerit;
- if (edge_dirs[d] == DOWN && dy >= eps
+ if (edge_dirs_[d] == DOWN && dy >= eps
&& fabs (my_modf (config->y[d]) - straddle) < eps)
dem += extra_demerit;
}
beam_y.distance (collision_y[UP]));
Real scale_free
- = max (parameters.COLLISION_PADDING - dist, 0.0) /
- parameters.COLLISION_PADDING;
+ = max (parameters_.COLLISION_PADDING - dist, 0.0) /
+ parameters_.COLLISION_PADDING;
demerits
+= collisions_[i].base_penalty_ *
- pow (scale_free, 3) * parameters.COLLISION_PENALTY;
+ pow (scale_free, 3) * parameters_.COLLISION_PENALTY;
}
config->add (demerits, "C");
projects / lilypond.git / blobdiff