return gh_scm2double (s);
}
+/*
+ Maximum multiplicity.
+ */
int
Beam::get_multiplicity (Grob *me)
{
}
if (count >= 1)
{
- if (!Directional_element_interface::get (me))
- Directional_element_interface::set (me, get_default_dir (me));
-
- consider_auto_knees (me);
- set_stem_directions (me);
+ Direction d = get_default_dir (me);
+
+ consider_auto_knees (me, d);
+ set_stem_directions (me, d);
set_stem_shorten (me);
}
+
return SCM_EOL;
}
Urg: non-forced should become `without/with unforced' direction,
once stem gets cleaned-up. */
void
-Beam::set_stem_directions (Grob *me)
+Beam::set_stem_directions (Grob *me, Direction d)
{
Link_array<Item> stems
=Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
- Direction d = Directional_element_interface::get (me);
for (int i=0; i <stems.size (); i++)
{
`Forced' stem directions are ignored. If you don't want auto-knees,
don't set, or unset auto-knee-gap. */
void
-Beam::consider_auto_knees (Grob *me)
+Beam::consider_auto_knees (Grob *me, Direction d)
{
SCM scm = me->get_grob_property ("auto-knee-gap");
Real staff_space = Staff_symbol_referencer::staff_space (me);
Real gap = gh_scm2double (scm) / staff_space;
- Direction d = Directional_element_interface::get (me);
+
Link_array<Item> stems=
Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
/* your similar cute comment here */
shorten_f *= forced_fraction;
-
- me->set_grob_property ("shorten", gh_double2scm (shorten_f));
+
+ if (shorten_f)
+ me->set_grob_property ("shorten", gh_double2scm (shorten_f));
}
/* Call list of y-dy-callbacks, that handle setting of
*/
- const int REGION_SIZE = 2;
- for (int i = -REGION_SIZE ; i < REGION_SIZE; i++)
+
+
+ /*
+ Do stem computations. These depend on YL and YR linearly, so we can
+ precompute for every stem 2 factors.
+ */
+ Link_array<Grob> stems=
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "stems");
+ Array<Stem_info> stem_infos;
+ Array<Real> lbase_lengths;
+ Array<Real> rbase_lengths;
+
+ Drul_array<bool> dirs_found(0,0);
+ for (int i= 0; i < stems.size(); i++)
+ {
+ Grob*s = stems[i];
+ stem_infos.push( Stem::calc_stem_info (s));
+
+ Real b = calc_stem_y (me, s, Interval (1,0));
+ lbase_lengths.push (b);
+
+ b = calc_stem_y (me, s, Interval (0,1));
+ rbase_lengths.push (b);
+
+ dirs_found [stem_infos.top().dir_] = true;
+ }
+
+ Direction ldir = Direction (stem_infos[0].dir_);
+ Direction rdir = Direction (stem_infos.top ().dir_);
+ bool knee_b = dirs_found[LEFT] && dirs_found[RIGHT];
+
+
+ int REGION_SIZE = 2;
+
+ /*
+ Knees are harder, lets try some more possibilities for knees.
+ */
+ if (knee_b)
+ REGION_SIZE += 2 ;
+
+ for (int i = -REGION_SIZE ; i < REGION_SIZE; i++)
for (int j = 0; j < num_quants; j++)
{
quantsl.push (i + quants[j] + int (yl));
qscores[i].demerits
+= score_forbidden_quants (me, qscores[i].yl, qscores[i].yr,
rad, slt, thickness, interbeam,
- multiplicity);
+ multiplicity, ldir, rdir);
}
- /*
- Do stem lengths. These depend on YL and YR linearly, so we can
- precompute for every stem 2 factors.
- */
- Link_array<Grob> stems=
- Pointer_group_interface__extract_grobs (me, (Grob*)0, "stems");
- Array<Stem_info> stem_infos;
- Array<Real> lbase_lengths;
- Array<Real> rbase_lengths;
-
- Array<int> directions;
-
- Drul_array<bool> dirs_found(0,0);
-
- for (int i= 0; i < stems.size(); i++)
- {
- Grob*s = stems[i];
- stem_infos.push( Stem::calc_stem_info (s));
-
- Real b = calc_stem_y (me, s, Interval (1,0));
- lbase_lengths.push (b);
-
- b = calc_stem_y (me, s, Interval (0,1));
- rbase_lengths.push (b);
-
- Direction d = Directional_element_interface::get( s);
- directions.push( d);
- dirs_found [d] = true;
- }
-
- bool knee_b = dirs_found[LEFT] && dirs_found[RIGHT];
for (int i = qscores.size (); i--;)
if (qscores[i].demerits < 100)
{
qscores[i].demerits
+= score_stem_lengths (stems, stem_infos,
lbase_lengths, rbase_lengths,
- directions, knee_b,
+ knee_b,
me, qscores[i].yl, qscores[i].yr);
}
Array<Stem_info> stem_infos,
Array<Real> left_factor,
Array<Real> right_factor,
- Array<int> directions,
bool knee,
- Grob*me, Real yl, Real yr)
+ Grob*me,
+ Real yl, Real yr)
{
Real demerit_score = 0.0 ;
-
+ Real pen = STEM_LENGTH_LIMIT_PENALTY;
+ if (knee)
+ pen = sqrt(pen);
+
for (int i=0; i < stems.size (); i++)
{
Grob* s = stems[i];
yl * left_factor[i] + right_factor[i]* yr;
Stem_info info = stem_infos[i];
- Direction d = Direction (directions[i]);
-
- Real pen = STEM_LENGTH_LIMIT_PENALTY;
- if (knee)
- pen = sqrt(pen);
-
- demerit_score += pen * ( 0 >? (info.min_y - d * current_y));
- demerit_score += pen * ( 0 >? (d * current_y - info.max_y));
+ Direction d = info.dir_;
- demerit_score += STEM_LENGTH_DEMERIT_FACTOR * shrink_extra_weight (d * current_y - info.ideal_y);
+ demerit_score += pen * ( 0 >? (info.dir_ *(info.shortest_y_ - current_y)));
+ demerit_score += STEM_LENGTH_DEMERIT_FACTOR
+ * shrink_extra_weight (d * current_y - info.dir_ * info.ideal_y_);
}
demerit_score *= 2.0 / stems.size ();
}
Real
-Beam::score_slopes_dy (Grob *me, Real yl, Real yr,
+Beam::score_slopes_dy (Grob *me,
+ Real yl, Real yr,
Real dy_mus, Real dy_damp)
{
Real dy = yr - yl;
}
dem += MUSICAL_DIRECTION_FACTOR * (0 >? (fabs (dy) - fabs (dy_mus)));
-
-
dem += shrink_extra_weight (fabs (dy_damp) - fabs (dy))* IDEAL_SLOPE_FACTOR;
+
return dem;
}
Real rad,
Real slt,
Real thickness, Real interbeam,
- int multiplicity)
+ int multiplicity,
+ Direction ldir, Direction rdir)
{
Real dy = yr - yl;
Real inter = 0.5;
Real hang = 1.0 - (thickness - slt) / 2;
- Direction dir = Directional_element_interface::get (me);
- if (fabs (yl - dir * interbeam) < rad
+
+ if (fabs (yl - ldir * interbeam) < rad
&& fabs (my_modf (yl) - inter) < 1e-3)
dem += SECONDARY_BEAM_DEMERIT;
- if (fabs (yr - dir * interbeam) < rad
+ if (fabs (yr - rdir * interbeam) < rad
&& fabs (my_modf (yr) - inter) < 1e-3)
dem += SECONDARY_BEAM_DEMERIT;
// hmm, without Interval/Drul_array, you get ~ 4x same code...
- if (fabs (yl - dir * interbeam) < rad + inter)
+ if (fabs (yl - ldir * interbeam) < rad + inter)
{
- if (dir == UP && dy <= eps
+ if (ldir == UP && dy <= eps
&& fabs (my_modf (yl) - sit) < eps)
dem += SECONDARY_BEAM_DEMERIT;
- if (dir == DOWN && dy >= eps
+ if (ldir == DOWN && dy >= eps
&& fabs (my_modf (yl) - hang) < eps)
dem += SECONDARY_BEAM_DEMERIT;
}
- if (fabs (yr - dir * interbeam) < rad + inter)
+ if (fabs (yr - rdir * interbeam) < rad + inter)
{
- if (dir == UP && dy >= eps
+ if (rdir == UP && dy >= eps
&& fabs (my_modf (yr) - sit) < eps)
dem += SECONDARY_BEAM_DEMERIT;
- if (dir == DOWN && dy <= eps
+ if (rdir == DOWN && dy <= eps
&& fabs (my_modf (yr) - hang) < eps)
dem += SECONDARY_BEAM_DEMERIT;
}
if (multiplicity >= 3)
{
- if (fabs (yl - 2 * dir * interbeam) < rad + inter)
+ if (fabs (yl - 2 * ldir * interbeam) < rad + inter)
{
- if (dir == UP && dy <= eps
+ if (ldir == UP && dy <= eps
&& fabs (my_modf (yl) - straddle) < eps)
dem += SECONDARY_BEAM_DEMERIT;
- if (dir == DOWN && dy >= eps
+ if (ldir == DOWN && dy >= eps
&& fabs (my_modf (yl) - straddle) < eps)
dem += SECONDARY_BEAM_DEMERIT;
}
- if (fabs (yr - 2 * dir * interbeam) < rad + inter)
+ if (fabs (yr - 2 * rdir * interbeam) < rad + inter)
{
- if (dir == UP && dy >= eps
+ if (rdir == UP && dy >= eps
&& fabs (my_modf (yr) - straddle) < eps)
dem += SECONDARY_BEAM_DEMERIT;
- if (dir == DOWN && dy <= eps
+ if (rdir == DOWN && dy <= eps
&& fabs (my_modf (yr) - straddle) < eps)
dem += SECONDARY_BEAM_DEMERIT;
}
me->set_grob_property ("positions", ly_interval2scm (pos));
return SCM_UNSPECIFIED;
}
-
- Direction dir = Directional_element_interface::get (me);
- Interval ideal (Stem::calc_stem_info (first_visible_stem (me)).ideal_y,
- Stem::calc_stem_info (last_visible_stem (me)).ideal_y);
+ Interval ideal (Stem::calc_stem_info (first_visible_stem (me)).ideal_y_,
+ Stem::calc_stem_info (last_visible_stem (me)).ideal_y_);
if (!ideal.delta ())
{
/* Make simple beam on middle line have small tilt */
if (!ideal[LEFT] && chord.delta () && count == 2)
{
- Direction d = (Direction) (sign (chord.delta ()) * dir);
- pos[d] = gh_scm2double (me->get_grob_property ("thickness")) / 2
- * dir;
+
+ /*
+ FIXME. -> UP
+ */
+ Direction d = (Direction) (sign (chord.delta ()) * UP);
+ pos[d] = gh_scm2double (me->get_grob_property ("thickness")) / 2;
+ // * dir;
pos[-d] = - pos[d];
}
else
{
pos = ideal;
- pos[LEFT] *= dir ;
- pos[RIGHT] *= dir ;
}
}
else
if (Stem::invisible_b (s))
continue;
ideals.push (Offset (s->relative_coordinate (0, X_AXIS) - x0,
- Stem::calc_stem_info (s).ideal_y));
+ Stem::calc_stem_info (s).ideal_y_));
}
Real y;
Real dydx;
Real dx = last_visible_stem (me)->relative_coordinate (0, X_AXIS) - x0;
Real dy = dydx * dx;
- me->set_grob_property ("least-squares-dy", gh_double2scm (dy * dir));
+ me->set_grob_property ("least-squares-dy", gh_double2scm (dy));
- pos = Interval (y*dir, (y+dy) * dir);
+ pos = Interval (y, (y+dy));
}
me->set_grob_property ("positions", ly_interval2scm (pos));
/* Concaveness #2: Sum distances of inner noteheads that fall
- outside the interval of the two outer noteheads */
+ outside the interval of the two outer noteheads.
+
+ We only do this for beams where first and last stem have the same
+ direction. --hwn.
+
+
+ Note that "convex" stems compensate for "concave" stems.
+ (is that intentional?) --hwn.
+ */
+
Real concaveness2 = 0;
SCM thresh = me->get_grob_property ("concaveness-threshold");
Real r2 = infinity_f;
- if (!concaveness1 && gh_number_p (thresh))
+ if (!concaveness1 && gh_number_p (thresh)
+ && Stem::get_direction(stems.top ())
+ == Stem::get_direction(stems[0]))
{
r2 = gh_scm2double (thresh);
-
- Direction dir = Directional_element_interface::get (me);
+ Direction dir = Stem::get_direction(stems.top ());
Real concave = 0;
Interval iv (Stem::chord_start_y (stems[0]),
Stem::chord_start_y (stems.top ()));
for (int i = 1; i < stems.size () - 1; i++)
{
- Real c = 0;
Real f = Stem::chord_start_y (stems[i]);
- if ((c = f - iv[MAX]) > 0)
- concave += c;
- else if ((c = f - iv[MIN]) < 0)
- concave += c;
+ concave += ((f - iv[MAX] ) >? 0) +
+ ((f - iv[MIN] ) <? 0);
}
- /*
- Ugh. This will mess up with knees. Direction should be
- determined per stem.
- */
concave *= dir;
-
concaveness2 = concave / (stems.size () - 2);
- /* ugh: this is the a kludge to get input/regression/beam-concave.ly
- to behave as baerenreiter. */
+
+ /* ugh: this is the a kludge to get
+ input/regression/beam-concave.ly to behave as
+ baerenreiter. */
+
+ /*
+ huh? we're dividing twice (which is not scalable) meaning that
+ the longer the beam, the more unlikely it will be
+ concave. Maybe you would even expect the other way around??
+
+ --hwn.
+
+ */
concaveness2 /= (stems.size () - 2);
}
* dy
: 0) + pos[LEFT];
- /* knee */
- Direction dir = Directional_element_interface::get (me);
- Direction sdir = Directional_element_interface::get (s);
-
- /* knee */
- if (dir!= sdir)
+
+ Direction first_dir = Directional_element_interface::get (first_visible_stem (me));
+ Direction my_dir = Directional_element_interface::get (s);
+
+ if (my_dir != first_dir)
{
- stem_y -= dir * (thick / 2 + (beam_multiplicity - 1) * interbeam);
+ /*
+ WTF is happening here ?
+
+ It looks as if this is some kind of fixup for multiple kneed
+ beams to get a piece of stem at the #.
+
+
+ x
+ |
+ =======|
+ |======#
+ |
+ |
+ x
+
+ Rules for this kind of stuff are hairy. In any event, the
+ current stem should look at the multiplicity of its
+ predecessor.
+
+ --hwn.
+
+ */
+ stem_y += my_dir * (thick / 2 + (beam_multiplicity - 1) * interbeam);
// huh, why not for first visible?
+ /*
+ What the heck is happening here??
+ */
Grob *last_visible = last_visible_stem (me);
if (last_visible)
{
if (!Stem::invisible_b (stems[i]))
common = common->common_refpoint (stems[i], Y_AXIS);
- Direction dir = Directional_element_interface::get (me);
Interval pos = ly_scm2interval (me->get_grob_property ("positions"));
Real staff_space = Staff_symbol_referencer::staff_space (me);
+
+ /*
+ DOCUMENT THIS.
+ */
+#if 0
Real thick = gh_scm2double (me->get_grob_property ("thickness"));
+ Direction dir = Directional_element_interface::get (me);
bool ps_testing = to_boolean (ly_symbol2scm ("ps-testing"));
+#endif
+
for (int i=0; i < stems.size (); i++)
{
Item* s = stems[i];
Real stem_y = calc_stem_y (me, s, pos);
+#if 0
// doesn't play well with dvips
if (ps_testing)
if (Stem::get_direction (s) == dir)
stem_y += Stem::get_direction (s) * thick / 2;
+#endif
/* caution: stem measures in staff-positions */
Real id = me->relative_coordinate (common, Y_AXIS)
/*
beams to go with one stem.
- FIXME: clean me up.
+ FIXME: clean me up:
+
+ The beam should be constructed by one function that knows where the
+ X and Y points are, and only inspects the stems to obtain
+ multiplicity and stem directions.
+
*/
Molecule
Beam::stem_beams (Grob *me, Item *here, Item *next, Item *prev, Real dydx)
}
- Direction dir = Directional_element_interface::get (me);
-
/* [Tremolo] beams on whole notes may not have direction set? */
- if (dir == CENTER)
- dir = Directional_element_interface::get (here);
-
+ Direction dir = Directional_element_interface::get (here);
/* half beams extending to the left. */
if (prev)
}
leftbeams.add_molecule (rightbeams);
- /* Does beam quanting think of the asymetry of beams?
- Refpoint is on bottom of symbol. (FIXTHAT) --hwn. */
return leftbeams;
}
Real dy = pos.delta ();
Real dydx = dy && dx ? dy/dx : 0;
+
+ Direction firstdir = Directional_element_interface::get ( Beam::first_visible_stem (me) );
+
for (int i=0; i < stems.size (); i++)
{
Item *item = stems[i];
Item *prev = (i > 0)? stems[i-1] : 0;
Item *next = (i < stems.size ()-1) ? stems[i+1] :0;
+
+
Molecule sb = stem_beams (me, item, next, prev, dydx);
Real x = item->relative_coordinate (0, X_AXIS) - x0;
sb.translate (Offset (x, x * dydx + pos[LEFT]));
+
+ Direction sd = Stem::get_direction (item);
mol.add_molecule (sb);
}
take the best scoring combination.
",
- "position-callbacks concaveness-gap concaveness-threshold dir-function quant-score auto-knee-gap gap chord-tremolo beamed-stem-shorten shorten least-squares-dy direction damping flag-width-function neutral-direction positions space-function thickness");
+ "position-callbacks concaveness-gap concaveness-threshold dir-function quant-score auto-knee-gap gap chord-tremolo beamed-stem-shorten shorten least-squares-dy damping flag-width-function neutral-direction positions space-function thickness");
+
{
Stem_info si ;
- si.ideal_y = gh_scm2double (gh_car (scm_info));
- si.max_y = gh_scm2double (gh_cadr (scm_info));
- si.min_y = gh_scm2double (gh_caddr (scm_info));
+ si.dir_ = Directional_element_interface::get(me);
+ si.ideal_y_ = gh_scm2double (gh_car (scm_info));
+ si.shortest_y_ = gh_scm2double (gh_cadr (scm_info));
return si;
}
-
- Grob * beam = beam_l (me);
-
- Direction beam_dir = Directional_element_interface::get (beam);
- if (!beam_dir)
- {
- programming_error ("Beam dir not set.");
- beam_dir = UP;
- }
-
+ Direction mydir = Directional_element_interface::get (me);
Real staff_space = Staff_symbol_referencer::staff_space (me);
Real half_space = staff_space / 2;
-
+
+ Grob * beam = beam_l (me);
int multiplicity = Beam::get_multiplicity (beam);
Real interbeam_f = Beam::get_interbeam (beam);
Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
- Stem_info info;
- info.ideal_y = chord_start_y (me);
-
- // for simplicity, we calculate as if dir == UP
-
- /*
- UGH. This confuses issues more. fixme. --hwn
- */
- info.ideal_y *= beam_dir;
+
+ Real ideal_y = chord_start_y (me);
+ ideal_y *= mydir;
SCM grace_prop = me->get_grob_property ("grace");
+
bool grace_b = to_boolean (grace_prop);
Array<Real> a;
a.push (gh_scm2double (ly_car (q)));
Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+ Real shortest_y = ideal_y;
-
- /*
- This sucks -- On a kneed beam, *all* stems are kneed, not half of them.
- */
- if (!beam_dir || (beam_dir == Directional_element_interface::get (me)))
- /* normal beamed stem */
+ if (multiplicity)
{
- if (multiplicity)
- {
- info.ideal_y += thick + (multiplicity - 1) * interbeam_f;
- }
- info.min_y = info.ideal_y;
- info.max_y = 1000; // INT_MAX;
+ ideal_y += thick + (multiplicity - 1) * interbeam_f;
+ }
- info.ideal_y += stem_length;
- info.min_y += minimum_length;
- /*
- lowest beam of (UP) beam must never be lower than second staffline
+ ideal_y += stem_length;
+ shortest_y += minimum_length;
- Hmm, reference (Wanske?)
+ /*
+ lowest beam of (UP) beam must never be lower than second staffline
- Although this (additional) rule is probably correct,
- I expect that highest beam (UP) should also never be lower
- than middle staffline, just as normal stems.
+ Hmm, reference (Wanske?)
+
+ Although this (additional) rule is probably correct,
+ I expect that highest beam (UP) should also never be lower
+ than middle staffline, just as normal stems.
- */
- bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b)
- {
- /* highest beam of (UP) beam must never be lower than middle
- staffline
- lowest beam of (UP) beam must never be lower than second staffline
- */
- info.min_y =
- info.min_y >? 0
- >? (- 2 * half_space - thick
- + (multiplicity > 0) * thick
- + interbeam_f * (multiplicity - 1));
- }
- }
- else
- /* knee */
+ */
+ bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
+ if (!grace_b && !no_extend_b)
{
- info.ideal_y -= thick + stem_length;
- info.max_y = info.ideal_y - minimum_length;
-
- /*
- We shouldn't invert the stems, so we set minimum at 0.
- */
- info.min_y = 0.5;
+ /* highest beam of (UP) beam must never be lower than middle
+ staffline
+ lowest beam of (UP) beam must never be lower than second staffline
+ */
+ shortest_y =
+ shortest_y >? 0
+ >? (- 2 * half_space - thick
+ + (multiplicity > 0) * thick
+ + interbeam_f * (multiplicity - 1));
}
+
- info.ideal_y = (info.max_y <? info.ideal_y) >? info.min_y;
+ ideal_y = ideal_y >? shortest_y;
s = beam->get_grob_property ("shorten");
if (gh_number_p (s))
- info.ideal_y -= gh_scm2double (s);
+ ideal_y -= gh_scm2double (s);
Grob *common = me->common_refpoint (beam, Y_AXIS);
- Real interstaff_f = beam_dir *
+ Real interstaff_f = mydir *
(me->relative_coordinate (common, Y_AXIS)
- beam->relative_coordinate (common, Y_AXIS));
- info.ideal_y += interstaff_f;
- info.min_y += interstaff_f;
- info.max_y += interstaff_f ;
+ ideal_y += interstaff_f;
+ shortest_y += interstaff_f;
+
+ ideal_y *= mydir;
+ shortest_y *= mydir;
+
me->set_grob_property ("stem-info",
- scm_list_n (gh_double2scm (info.ideal_y),
- gh_double2scm (info.max_y),
- gh_double2scm (info.min_y),
+ scm_list_n (gh_double2scm (ideal_y),
+ gh_double2scm (shortest_y),
SCM_UNDEFINED));
+
+ Stem_info si;
+ si.dir_ = mydir;
+ si.shortest_y_ = shortest_y;
+ si.ideal_y_ = ideal_y;
- return info;
+ return si;
}
ADD_INTERFACE (Stem,"stem-interface",
projects / lilypond.git / commitdiff