#include <math.h> // tanh.
-#include "align-interface.hh"
#include "molecule.hh"
#include "directional-element-interface.hh"
#include "beaming.hh"
#endif
-const int INTER_QUANT_PENALTY = 1000;
-const int SECONDARY_BEAM_DEMERIT = 15;
-const int STEM_LENGTH_DEMERIT_FACTOR = 5;
-// possibly ridiculous, but too short stems just won't do
-const int STEM_LENGTH_LIMIT_PENALTY = 5000;
-const int DAMPING_DIRECTIION_PENALTY = 800;
-const int MUSICAL_DIRECTION_FACTOR = 400;
-const int IDEAL_SLOPE_FACTOR = 10;
-const int REGION_SIZE = 2;
-
-
-static Real
-shrink_extra_weight (Real x)
-{
- return fabs (x) * ((x < 0) ? 1.5 : 1.0);
-}
-
void
Beam::add_stem (Grob *me, Grob *s)
{
Real staff_space = Staff_symbol_referencer::staff_space (me);
Real gap = gh_scm2double (scm) / staff_space;
-
Link_array<Grob> stems=
Pointer_group_interface__extract_grobs (me, (Grob*)0, "stems");
return SCM_UNSPECIFIED;
}
-struct Quant_score
-{
- Real yl;
- Real yr;
- Real demerits;
-};
-
-
-/*
- TODO:
-
- - Make all demerits customisable
-
- - One sensible check per demerit (what's this --hwn)
-
- - Add demerits for quants per se, as to forbid a specific quant
- entirely
-
-*/
-MAKE_SCHEME_CALLBACK (Beam, quanting, 1);
-SCM
-Beam::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 ss = Staff_symbol_referencer::staff_space (me);
- Real thickness = gh_scm2double (me->get_grob_property ("thickness")) / ss;
- Real slt = me->paper_l ()->get_var ("linethickness") / ss;
-
-
- SCM sdy = me->get_grob_property ("least-squares-dy");
- Real dy_mus = gh_number_p (sdy) ? gh_scm2double (sdy) : 0.0;
-
- Real straddle = 0.0;
- Real sit = (thickness - slt) / 2;
- Real inter = 0.5;
- Real hang = 1.0 - (thickness - slt) / 2;
- Real quants [] = {straddle, sit, inter, hang };
-
- int num_quants = int (sizeof (quants)/sizeof (Real));
- Array<Real> quantsl;
- Array<Real> quantsr;
-
- /*
- going to REGION_SIZE == 2, yields another 0.6 second with
- wtk1-fugue2.
-
-
- (result indexes between 70 and 575) ? --hwn.
-
- */
-
-
-
- /*
- 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);
- Grob *common_y = common_refpoint_of_array (stems, me, Y_AXIS);
-
- bool french = to_boolean (me->get_grob_property ("french-beaming"));
- for (int i= 0; i < stems.size(); i++)
- {
- Grob*s = stems[i];
- stem_infos.push (Stem::calc_stem_info (s));
- dirs_found[stem_infos.top ().dir_] = true;
-
- Real b = calc_stem_y (me, s, common_y , Interval (1,0), french && i > 0&& (i < stems.size () -1));
- lbase_lengths.push (b);
-
- Real a = calc_stem_y (me, s, common_y , Interval (0,1), french && i > 0&& (i < stems.size () -1));
- rbase_lengths.push (a);
- }
-
- 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 = REGION_SIZE;
- /*
- 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));
- 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);
- }
-
-
- /*
- This is a longish function, but we don't separate this out into
- neat modular separate subfunctions, as the subfunctions would be
- called for many values of YL, YR. By precomputing various
- parameters outside of the loop, we can save a lot of time.
-
- */
-
-
- Grob *fvs = first_visible_stem (me);
- Grob *lvs = last_visible_stem (me);
-
- bool xstaff= false;
- if (lvs && fvs)
- {
- Grob *commony = fvs->common_refpoint (lvs, Y_AXIS);
- xstaff = Align_interface::has_interface (commony);
- }
-
- for (int i = qscores.size (); i--;)
- if (qscores[i].demerits < 100)
- {
- qscores[i].demerits
- += score_slopes_dy (me, qscores[i].yl, qscores[i].yr,
- dy_mus, yr- yl, xstaff);
- }
-
- Real rad = Staff_symbol_referencer::staff_radius (me);
- int beam_count = get_beam_count (me);
- Real beam_space = beam_count < 4
- ? (2*ss + slt - thickness) / 2.0
- : (3*ss + slt - thickness) / 3.0;
-
- for (int i = qscores.size (); i--;)
- if (qscores[i].demerits < 100)
- {
- qscores[i].demerits
- += score_forbidden_quants (me, qscores[i].yl, qscores[i].yr,
- rad, slt, thickness, beam_space,
- beam_count, ldir, rdir);
- }
-
-
- for (int i = qscores.size (); i--;)
- if (qscores[i].demerits < 100)
- {
- qscores[i].demerits
- += score_stem_lengths (stems, stem_infos,
- lbase_lengths, rbase_lengths,
- knee_b,
- me, qscores[i].yl, qscores[i].yr);
- }
-
-
- 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))
- );
-
-#if DEBUG_QUANTING
-
- // debug quanting
- me->set_grob_property ("quant-score",
- gh_double2scm (qscores[best_idx].demerits));
- me->set_grob_property ("best-idx", gh_int2scm (best_idx));
-#endif
-
- return SCM_UNSPECIFIED;
-}
-
-Real
-Beam::score_stem_lengths (Link_array<Grob>stems,
- Array<Stem_info> stem_infos,
- Array<Real> left_factor,
- Array<Real> right_factor,
- bool knee,
- Grob*me,
- Real yl, Real yr)
-{
- Real demerit_score = 0.0 ;
- Real pen = STEM_LENGTH_LIMIT_PENALTY;
-
- for (int i=0; i < stems.size (); i++)
- {
- Grob* s = stems[i];
- if (Stem::invisible_b (s))
- continue;
-
- Real current_y =
- yl * left_factor[i] + right_factor[i]* yr;
-
- Stem_info info = stem_infos[i];
- Direction d = info.dir_;
-
- 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 ();
-
- return demerit_score;
-}
-
-Real
-Beam::score_slopes_dy (Grob *me,
- Real yl, Real yr,
- Real dy_mus, Real dy_damp,
- bool xstaff)
-{
- Real dy = yr - yl;
-
- Real dem = 0.0;
- if (sign (dy_damp) != sign (dy))
- {
- dem += DAMPING_DIRECTIION_PENALTY;
- }
-
- dem += MUSICAL_DIRECTION_FACTOR * (0 >? (fabs (dy) - fabs (dy_mus)));
-
-
- Real slope_penalty = IDEAL_SLOPE_FACTOR;
-
- /*
- Xstaff beams tend to use extreme slopes to get short stems. We
- put in a penalty here.
- */
- if (xstaff)
- slope_penalty *= 10;
-
- dem += shrink_extra_weight (fabs (dy_damp) - fabs (dy))* slope_penalty;
- return dem;
-}
-
-static Real
-my_modf (Real x)
-{
- return x - floor (x);
-}
-
-Real
-Beam::score_forbidden_quants (Grob*me,
- Real yl, Real yr,
- Real rad,
- Real slt,
- Real thickness, Real beam_space,
- int beam_count,
- Direction ldir, Direction rdir)
-{
- Real dy = yr - yl;
-
- Real dem = 0.0;
- if (fabs (yl) < rad && fabs ( my_modf (yl) - 0.5) < 1e-3)
- dem += INTER_QUANT_PENALTY;
- if (fabs (yr) < rad && fabs ( my_modf (yr) - 0.5) < 1e-3)
- dem += INTER_QUANT_PENALTY;
-
- // todo: use beam_count of outer stems.
- if (beam_count >= 2)
- {
-
- Real straddle = 0.0;
- Real sit = (thickness - slt) / 2;
- Real inter = 0.5;
- Real hang = 1.0 - (thickness - slt) / 2;
-
-
- if (fabs (yl - ldir * beam_space) < rad
- && fabs (my_modf (yl) - inter) < 1e-3)
- dem += SECONDARY_BEAM_DEMERIT;
- if (fabs (yr - rdir * beam_space) < rad
- && fabs (my_modf (yr) - inter) < 1e-3)
- dem += SECONDARY_BEAM_DEMERIT;
-
- Real eps = 1e-3;
-
- /*
- Can't we simply compute the distance between the nearest
- staffline and the secondary beam? That would get rid of the
- silly case analysis here (which is probably not when we have
- different beam-thicknesses.)
-
- --hwn
- */
-
-
- // hmm, without Interval/Drul_array, you get ~ 4x same code...
- if (fabs (yl - ldir * beam_space) < rad + inter)
- {
- if (ldir == UP && dy <= eps
- && fabs (my_modf (yl) - sit) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
-
- if (ldir == DOWN && dy >= eps
- && fabs (my_modf (yl) - hang) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
- }
-
- if (fabs (yr - rdir * beam_space) < rad + inter)
- {
- if (rdir == UP && dy >= eps
- && fabs (my_modf (yr) - sit) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
-
- if (rdir == DOWN && dy <= eps
- && fabs (my_modf (yr) - hang) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
- }
-
- if (beam_count >= 3)
- {
- if (fabs (yl - 2 * ldir * beam_space) < rad + inter)
- {
- if (ldir == UP && dy <= eps
- && fabs (my_modf (yl) - straddle) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
-
- if (ldir == DOWN && dy >= eps
- && fabs (my_modf (yl) - straddle) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
- }
-
- if (fabs (yr - 2 * rdir * beam_space) < rad + inter)
- {
- if (rdir == UP && dy >= eps
- && fabs (my_modf (yr) - straddle) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
-
- if (rdir == DOWN && dy <= eps
- && fabs (my_modf (yr) - straddle) < eps)
- dem += SECONDARY_BEAM_DEMERIT;
- }
- }
- }
-
- return dem;
-}
-
-
-
MAKE_SCHEME_CALLBACK (Beam, least_squares, 1);
SCM
Beam::least_squares (SCM smob)
/*
Calculate the Y position of the stem-end, given the Y-left, Y-right
- in POS, and for stem S.
+ in POS for stem S. This Y position is relative to S.
*/
Real
-Beam::calc_stem_y (Grob *me, Grob* s, Grob * common_y, Interval pos, bool french)
+Beam::calc_stem_y (Grob *me, Grob* s, Grob ** common,
+ Real xl, Real xr,
+ Interval pos, bool french)
{
Real beam_space = get_beam_space (me);
- // ugh -> use commonx
- Grob * fvs = first_visible_stem (me);
- Grob *lvs = last_visible_stem (me);
- Real x0 = fvs ? fvs->relative_coordinate (0, X_AXIS) : 0.0;
- Real dx = fvs ? lvs->relative_coordinate (0, X_AXIS) - x0 : 0.0;
- Real r = s->relative_coordinate (0, X_AXIS) - x0;
+ Real r = s->relative_coordinate (common[X_AXIS], X_AXIS) - xl;
Real dy = pos.delta ();
+ Real dx = xr - xl;
Real stem_y_beam0 = (dy && dx
? r / dx
* dy
: 0) + pos[LEFT];
-
-
Direction my_dir = Directional_element_interface::get (s);
SCM beaming = s->get_grob_property ("beaming");
stem_y +=bm[my_dir] * beam_space;
}
- Real id = me->relative_coordinate (common_y, Y_AXIS)
- - s->relative_coordinate (common_y, Y_AXIS);
+ Real id = me->relative_coordinate (common[Y_AXIS], Y_AXIS)
+ - s->relative_coordinate (common[Y_AXIS], Y_AXIS);
return stem_y + id;
}
if (stems.size () <= 1)
return;
- Grob *common = common_refpoint_of_array (stems, me, Y_AXIS);
+ Grob *common[2];
+ for (int a = 2; a--;)
+ common[a] = common_refpoint_of_array (stems, me, Axis(a));
+
Interval pos = ly_scm2interval (me->get_grob_property ("positions"));
Real staff_space = Staff_symbol_referencer::staff_space (me);
bool french = to_boolean (me->get_grob_property ("french-beaming"));
-
+
+
+ // ugh -> use commonx
+ Grob * fvs = first_visible_stem (me);
+ Grob *lvs = last_visible_stem (me);
+
+ Real xl = fvs ? fvs->relative_coordinate (common[X_AXIS], X_AXIS) : 0.0;
+ Real xr = fvs ? lvs->relative_coordinate (common[X_AXIS], X_AXIS) : 0.0;
+
for (int i=0; i < stems.size (); i++)
{
Grob* s = stems[i];
if (Stem::invisible_b (s))
continue;
- Real stem_y = calc_stem_y (me, s, common , pos, french && i > 0&& (i < stems.size () -1));
+ Real stem_y = calc_stem_y (me, s, common,
+ xl, xr,
+ pos, french && i > 0&& (i < stems.size () -1));
- Stem::set_stemend (s, 2* stem_y / staff_space);
+ Stem::set_stemend (s, 2* stem_y / staff_space);
}
}
projects / lilypond.git / blobdiff