+++ /dev/null
-/*
- beam.cc -- implement Beam
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
-
-*/
-
-/*
- [TODO]
-
- -* shorter! (now +- 1000 lines)
-
- -* less hairy code
-
- -* Remove #'direction from beam. The beam has no direction per se.
- It may only set directions for stems.
- */
-
-
-#include <math.h> // tanh.
-
-#include "molecule.hh"
-#include "directional-element-interface.hh"
-#include "beaming.hh"
-#include "beam.hh"
-#include "misc.hh"
-#include "least-squares.hh"
-#include "stem.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
-#include "group-interface.hh"
-#include "staff-symbol-referencer.hh"
-#include "item.hh"
-#include "spanner.hh"
-#include "warn.hh"
-
-void
-Beam::add_stem (Grob*me, Grob*s)
-{
- Pointer_group_interface::add_grob (me, ly_symbol2scm ("stems"), s);
-
- s->add_dependency (me);
-
- assert (!Stem::beam_l (s));
- s->set_grob_property ("beam", me->self_scm ());
-
- add_bound_item (dynamic_cast<Spanner*> (me), dynamic_cast<Item*> (s));
-}
-
-int
-Beam::get_multiplicity (Grob*me)
-{
- int m = 0;
- for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
- {
- Grob * sc = unsmob_grob (ly_car (s));
-
- if (Stem::has_interface (sc))
- m = m >? Stem::beam_count (sc,LEFT) >? Stem::beam_count (sc,RIGHT);
- }
- return m;
-}
-
-/*
- After pre-processing all directions should be set.
- Several post-processing routines (stem, slur, script) need stem/beam
- direction.
- Currenly, this means that beam has set all stem's directions.
- [Alternatively, stems could set its own directions, according to
- their beam, during 'final-pre-processing'.]
- */
-MAKE_SCHEME_CALLBACK (Beam,before_line_breaking,1);
-SCM
-Beam::before_line_breaking (SCM smob)
-{
- Grob * me = unsmob_grob (smob);
-
- /*
- Beams with less than 2 two stems don't make much sense, but could happen
- when you do
-
- [r8 c8 r8].
-
- For a beam that only has one stem, we try to do some disappearance magic:
- we revert the flag, and move on to The Eternal Engraving Fields.*/
-
-
- if (visible_stem_count (me) < 2)
- {
- me->warning (_ ("beam has less than two visible stems"));
-
- SCM stems = me->get_grob_property ("stems");
- if (scm_ilength (stems) == 1)
- {
- me->warning (_("Beam has less than two stems. Removing beam."));
-
- unsmob_grob (gh_car (stems))->remove_grob_property ("beam");
- me->suicide ();
-
- return SCM_UNSPECIFIED;
- }
- else if (scm_ilength (stems) == 0)
- {
- me->suicide ();
- return SCM_UNSPECIFIED;
- }
- }
- if (visible_stem_count (me) >= 1)
- {
- if (!Directional_element_interface::get (me))
- Directional_element_interface::set (me, get_default_dir (me));
-
- consider_auto_knees (me);
- set_stem_directions (me);
- set_stem_shorten (me);
- }
- return SCM_EOL;
-}
-
-Direction
-Beam::get_default_dir (Grob*me)
-{
- Drul_array<int> total;
- total[UP] = total[DOWN] = 0;
- Drul_array<int> count;
- count[UP] = count[DOWN] = 0;
- Direction d = DOWN;
-
- Link_array<Item> stems=
- Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
-
- for (int i=0; i <stems.size (); i++)
- do {
- Grob *s = stems[i];
- Direction sd = Directional_element_interface::get (s);
- int current = sd ? (1 + d * sd)/2
- : Stem::get_center_distance (s, (Direction)-d);
-
- if (current)
- {
- total[d] += current;
- count[d] ++;
- }
-
- } while (flip (&d) != DOWN);
-
- SCM func = me->get_grob_property ("dir-function");
- SCM s = gh_call2 (func,
- gh_cons (gh_int2scm (count[UP]),
- gh_int2scm (count[DOWN])),
- gh_cons (gh_int2scm (total[UP]),
- gh_int2scm (total[DOWN])));
-
- if (gh_number_p (s) && gh_scm2int (s))
- return to_dir (s);
-
- /*
- If dir is not determined: get default
- */
- return to_dir (me->get_grob_property ("neutral-direction"));
-}
-
-
-/*
- Set all stems with non-forced direction to beam direction.
- Urg: non-forced should become `without/with unforced' direction,
- once stem gets cleaned-up.
- */
-void
-Beam::set_stem_directions (Grob*me)
-{
- 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++)
- {
- Grob *s = stems[i];
- SCM force = s->remove_grob_property ("dir-forced");
- if (!gh_boolean_p (force) || !gh_scm2bool (force))
- Directional_element_interface ::set (s,d);
- }
-}
-
-/*
- Simplistic auto-knees; only consider vertical gap between two
- adjacent chords.
-
- `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)
-{
- SCM scm = me->get_grob_property ("auto-knee-gap");
-
- if (gh_number_p (scm))
- {
- bool knee_b = false;
- Real knee_y = 0;
- 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");
-
- Grob *common = me->common_refpoint (stems[0], Y_AXIS);
- for (int i=1; i < stems.size (); i++)
- if (!Stem::invisible_b (stems[i]))
- common = common->common_refpoint (stems[i], Y_AXIS);
-
- int l = 0;
- for (int i=1; i < stems.size (); i++)
- {
- if (!Stem::invisible_b (stems[i-1]))
- l = i - 1;
- if (Stem::invisible_b (stems[l]))
- continue;
- if (Stem::invisible_b (stems[i]))
- continue;
-
- Real left = Stem::extremal_heads (stems[l])[d]
- ->relative_coordinate (common, Y_AXIS);
- Real right = Stem::extremal_heads (stems[i])[-d]
- ->relative_coordinate (common, Y_AXIS);
-
- Real dy = right - left;
-
- if (abs (dy) >= gap)
- {
- knee_y = (right + left) / 2;
- knee_b = true;
- break;
- }
- }
-
- if (knee_b)
- {
- for (int i=0; i < stems.size (); i++)
- {
- if (Stem::invisible_b (stems[i]))
- continue;
- Item *s = stems[i];
- Real y = Stem::extremal_heads (stems[i])[d]
- ->relative_coordinate (common, Y_AXIS);
-
- Directional_element_interface::set (s, y < knee_y ? UP : DOWN);
- s->set_grob_property ("dir-forced", SCM_BOOL_T);
- }
- }
- }
-}
-
-/*
- Set stem's shorten property if unset.
- TODO:
- take some y-position (chord/beam/nearest?) into account
- scmify forced-fraction
- */
-void
-Beam::set_stem_shorten (Grob*m)
-{
- Spanner*me = dynamic_cast<Spanner*> (m);
-
- Real forced_fraction = forced_stem_count (me) / visible_stem_count (me);
- if (forced_fraction < 0.5)
- return;
-
- int multiplicity = get_multiplicity (me);
-
- SCM shorten = me->get_grob_property ("beamed-stem-shorten");
- if (shorten == SCM_EOL)
- return;
-
- int sz = scm_ilength (shorten);
-
- Real staff_space = Staff_symbol_referencer::staff_space (me);
- SCM shorten_elt = scm_list_ref (shorten, gh_int2scm (multiplicity <? (sz - 1)));
- Real shorten_f = gh_scm2double (shorten_elt) * staff_space;
-
- /* cute, but who invented me -- how to customise ? */
- if (forced_fraction < 1)
- shorten_f /= 2;
-
- Link_array<Item> stems=
- Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
-
- for (int i=0; i < stems.size (); i++)
- {
- Item* s = stems[i];
- if (Stem::invisible_b (s))
- continue;
- if (gh_number_p (s->get_grob_property ("shorten")))
- s->set_grob_property ("shorten", gh_double2scm (shorten_f));
- }
-}
-
-/*
- Call list of y-dy-callbacks, that handle setting of
- grob-properties y, dy.
-
- User may set grob-properties: y-position-hs and height-hs
- (to be fixed) that override the calculated y and dy.
-
- Because y and dy cannot be calculated and quanted separately, we
- always calculate both, then check for user override.
- */
-MAKE_SCHEME_CALLBACK (Beam, after_line_breaking, 1);
-SCM
-Beam::after_line_breaking (SCM smob)
-{
- Grob * me = unsmob_grob (smob);
-
- me->set_grob_property ("y", gh_double2scm (0));
- me->set_grob_property ("dy", gh_double2scm (0));
-
- /* Hmm, callbacks should be called by, a eh, callback mechanism
- somewhere (?), I guess, not by looping here. */
-
- SCM list = me->get_grob_property ("y-dy-callbacks");
- for (SCM i = list; gh_pair_p (i); i = ly_cdr (i))
- gh_call1 (ly_car (i), smob);
-
- // UGH. Y is not in staff position unit?
- // Ik dacht datwe daar juist van weg wilden?
-
- // Hmm, nu hebben we 3 dimensies, want inmiddels zijn we daar
- // weer terug, maar dan / 2
- // (staff-space iso staff-position)
-
- set_stem_lengths (me);
-
- return SCM_UNSPECIFIED;
-}
-
-
-MAKE_SCHEME_CALLBACK (Beam, least_squares, 1);
-SCM
-Beam::least_squares (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
-
- if (visible_stem_count (me) <= 1)
- return SCM_UNSPECIFIED;
-
- Real y = 0;
- Real dy = 0;
-
- /* Stem_info, and thus y,dy in this function are corrected for beam-dir */
- Real first_ideal = Stem::calc_stem_info (first_visible_stem (me)).idealy_f_;
- if (first_ideal == Stem::calc_stem_info (last_visible_stem (me)).idealy_f_)
- {
- y = first_ideal;
- dy = 0;
- }
- else
- {
- Array<Offset> ideals;
-
- // ugh -> use commonx
- Real x0 = first_visible_stem (me)->relative_coordinate (0, X_AXIS);
- Link_array<Item> stems=
- Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
-
- for (int i=0; i < stems.size (); i++)
- {
- Item* s = stems[i];
- if (Stem::invisible_b (s))
- continue;
- ideals.push (Offset (s->relative_coordinate (0, X_AXIS) - x0,
- Stem::calc_stem_info (s).idealy_f_));
- }
- Real dydx;
- minimise_least_squares (&dydx, &y, ideals);
-
- Real dx = last_visible_stem (me)->relative_coordinate (0, X_AXIS) - x0;
- dy = dydx * dx;
- }
-
- /* Store true, not dir-corrected values */
- Direction dir = Directional_element_interface::get (me);
- me->set_grob_property ("y", gh_double2scm (y * dir));
- me->set_grob_property ("dy", gh_double2scm (dy * dir));
- return SCM_UNSPECIFIED;
-}
-
-#include <stdio.h>
-MAKE_SCHEME_CALLBACK (Beam, check_concave, 1);
-SCM
-Beam::check_concave (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
-
- Link_array<Item> stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
-
- for (int i = 0; i < stems.size ();)
- {
- if (Stem::invisible_b (stems[i]))
- stems.del (i);
- else
- i++;
- }
-
- if (stems.size () < 3)
- return SCM_UNSPECIFIED;
-
- SCM s = me->get_grob_property ("concaveness-no-slope");
-
- Real concave = 0;
- if (!to_boolean (s))
- {
- /* Concaveness try #1: Sum distances of inner noteheads to line
- between two outer noteheads. */
-
- Real dy = Stem::chord_start_f (stems.top ())
- - Stem::chord_start_f (stems[0]);
- Real slope = dy / (stems.size () - 1);
-
- Real y0 = Stem::chord_start_f (stems[0]);
- for (int i = 1; i < stems.size () - 1; i++)
- {
- Real c = (Stem::chord_start_f (stems[i]) - y0) - i * slope;
- concave += c;
- }
-
- }
- else
- {
- /* Concaveness try #2: Sum distances of inner noteheads that
- fall outside the interval of the two outer noteheads */
-
- Interval iv = Interval (Stem::chord_start_f (stems[0]),
- Stem::chord_start_f (stems.top ()));
-
- if (iv[MAX] < iv[MIN])
- // iv.swap ();
- iv = Interval (iv[MAX], iv[MIN]);
-
- for (int i = 1; i < stems.size () - 1; i++)
- {
- Real c = 0;
- Real f = Stem::chord_start_f (stems[i]);
- if ((c = f - iv[MAX]) > 0)
- concave += c;
- else if ((c = f - iv[MIN]) < 0)
- concave += c;
- }
- }
-
- concave *= Directional_element_interface::get (me);
-
- Real concaveness = concave / (stems.size () - 2);
-
- /* ugh: this is the a kludge to get input/regression/beam-concave.ly
- to behave as baerenreiter. */
- s = me->get_grob_property ("concaveness-square");
- if (to_boolean (s))
- concaveness /= (stems.size () - 2);
-
- s = me->get_grob_property ("concaveness");
- Real r = gh_scm2double (s);
-
- if (concaveness > r)
- {
- Direction dir = Directional_element_interface::get (me);
- Real y = gh_scm2double (me->get_grob_property ("y")) * dir;
- Real dy = gh_scm2double (me->get_grob_property ("dy")) * dir;
-
- Real adjusted_y = y + dy / 2;
- /* Store true, not dir-corrected values */
- me->set_grob_property ("y", gh_double2scm (adjusted_y * dir));
- me->set_grob_property ("dy", gh_double2scm (0));
- }
-
- s = me->get_grob_property ("debug-concave");
- if (to_boolean (s))
- {
-#if 0
- Item *text = new Item (me->get_property ("TextScript"));
- text->set_grob_property ("text",
- ly_str02scm (to_str (concaveness).ch_C ())),
- Side_position_interface::add_support (text, stem[0]);
-#else
- printf ("concaveness: %.2f\n", concaveness);
-#endif
- }
-
- return SCM_UNSPECIFIED;
-}
-
-/*
- This neat trick is by Werner Lemberg,
- damped = tanh (slope)
- corresponds with some tables in [Wanske]
-*/
-MAKE_SCHEME_CALLBACK (Beam, slope_damping, 1);
-SCM
-Beam::slope_damping (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
-
- if (visible_stem_count (me) <= 1)
- return SCM_UNSPECIFIED;
-
- SCM s = me->get_grob_property ("damping");
- int damping = gh_scm2int (s);
-
- if (damping)
- {
- /* y,dy in this function are corrected for beam-dir */
- Direction dir = Directional_element_interface::get (me);
- Real y = gh_scm2double (me->get_grob_property ("y")) * dir;
- Real dy = gh_scm2double (me->get_grob_property ("dy")) * dir;
-
- // ugh -> use commonx
- Real dx = last_visible_stem (me)->relative_coordinate (0, X_AXIS)
- - first_visible_stem (me)->relative_coordinate (0, X_AXIS);
- Real dydx = dy && dx ? dy/dx : 0;
- dydx = 0.6 * tanh (dydx) / damping;
-
- Real damped_dy = dydx * dx;
- Real adjusted_y = y + (dy - damped_dy) / 2;
- /* Store true, not dir-corrected values */
- me->set_grob_property ("y", gh_double2scm (adjusted_y * dir));
- me->set_grob_property ("dy", gh_double2scm (damped_dy * dir));
- }
- return SCM_UNSPECIFIED;
-}
-
-/*
- Quantise dy (height) of beam.
- Generalisation of [Ross].
- */
-MAKE_SCHEME_CALLBACK (Beam, quantise_dy, 1);
-SCM
-Beam::quantise_dy (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
-
- if (visible_stem_count (me) <= 1)
- return SCM_UNSPECIFIED;
-
- Array<Real> a;
- SCM proc = me->get_grob_property ("height-quants");
- SCM quants = gh_call2 (proc, me->self_scm (),
- gh_double2scm (me->paper_l ()->get_var ("stafflinethickness")
- / 1.0));
-
- for (SCM s = quants; gh_pair_p (s); s = ly_cdr (s))
- a.push (gh_scm2double (ly_car (s)));
-
- if (a.size () > 1)
- {
- /* y,dy in this function are corrected for beam-dir */
- Direction dir = Directional_element_interface::get (me);
- Real y = gh_scm2double (me->get_grob_property ("y")) * dir;
- Real dy = gh_scm2double (me->get_grob_property ("dy")) * dir;
-
- Real staff_space = Staff_symbol_referencer::staff_space (me);
-
- Interval iv = quantise_iv (a, abs (dy)/staff_space) * staff_space;
- Real q = (abs (dy) - iv[SMALLER] <= iv[BIGGER] - abs (dy))
- ? iv[SMALLER]
- : iv[BIGGER];
-
- Real quantised_dy = q * sign (dy);
- Real adjusted_y = y + (dy - quantised_dy) / 2;
- /* Store true, not dir-corrected values */
- me->set_grob_property ("y", gh_double2scm (adjusted_y * dir));
- me->set_grob_property ("dy", gh_double2scm (quantised_dy * dir));
- }
- return SCM_UNSPECIFIED;
-}
-
-/* It's tricky to have the user override y,dy directly, so we use this
- translation func. Also, if our staff_space != 1 (smaller staff, eg),
- user will expect staff-position to be discrete values. */
-MAKE_SCHEME_CALLBACK (Beam, user_override, 1);
-SCM
-Beam::user_override (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
- Real staff_space = Staff_symbol_referencer::staff_space (me);
-
- SCM s = me->get_grob_property ("staff-position");
- if (gh_number_p (s))
- {
- Real y = gh_scm2double (s) * staff_space * 0.5;
- me->set_grob_property ("y", gh_double2scm (y));
- }
-
- /* Name suggestions? Tilt, slope, vertical-* ? */
- s = me->get_grob_property ("height");
- if (gh_number_p (s))
- {
- Real dy = gh_scm2double (s) * staff_space * 0.5;
- me->set_grob_property ("dy", gh_double2scm (dy));
- }
-
- return SCM_UNSPECIFIED;
-}
-
-/*
- Ugh, this must be last, after user_override
- Assumes directionised y/dy.
- */
-MAKE_SCHEME_CALLBACK (Beam, do_quantise_y, 1);
-SCM
-Beam::do_quantise_y (SCM smob)
-{
- Grob *me = unsmob_grob (smob);
-
- /*
- If the user set y-position, we shouldn't do quanting.
- */
- if (gh_number_p (me->get_grob_property ("y-position-hs")))
- return SCM_UNSPECIFIED;
-
- Real y = gh_scm2double (me->get_grob_property ("y"));
- Real dy = gh_scm2double (me->get_grob_property ("dy"));
-
- /* we can modify y, so we should quantise y */
- Real half_space = Staff_symbol_referencer::staff_space (me) / 2;
- Real y_shift = check_stem_length_f (me, y, dy);
- y += y_shift;
- y = quantise_y_f (me, y, dy, 0);
-
- /*
- Hmm, this is a bit keyhole operation: we're passing `this' as a
- parameter, and member vars as SCM properties. We should decide on
- SCM/C/C++ boundary */
- me->set_grob_property ("y", gh_double2scm (y));
- set_stem_lengths (me);
- y = gh_scm2double (me->get_grob_property ("y"));
-
- y_shift = check_stem_length_f (me, y, dy);
-
- if (y_shift > half_space / 4)
- {
- y += y_shift;
-
- /*
- for significantly lengthened or shortened stems,
- request quanting the other way.
- */
- int quant_dir = 0;
- if (abs (y_shift) > half_space / 2)
- quant_dir = sign (y_shift) * Directional_element_interface::get (me);
- y = quantise_y_f (me, y, dy, quant_dir);
- }
-
- me->set_grob_property ("y", gh_double2scm (y));
- // me->set_grob_property ("dy", gh_double2scm (dy));
- return SCM_UNSPECIFIED;
-}
-
-
-Real
-Beam::calc_stem_y_f (Grob*me,Item* s, Real y, Real dy)
-{
- int beam_multiplicity = get_multiplicity (me);
- int stem_multiplicity = (Stem::flag_i (s) - 2) >? 0;
-
- SCM space_proc = me->get_grob_property ("space-function");
- SCM space = gh_call1 (space_proc, gh_int2scm (beam_multiplicity));
-
- Real thick = gh_scm2double (me->get_grob_property ("thickness")) ;
- Real interbeam_f = gh_scm2double (space) ;
-
- // ugh -> use commonx
- Real x0 = first_visible_stem (me)->relative_coordinate (0, X_AXIS);
- Real dx = last_visible_stem (me)->relative_coordinate (0, X_AXIS) - x0;
- Real stem_y = (dy && dx ? (s->relative_coordinate (0, X_AXIS) - x0) / dx * dy : 0) + y;
-
- /* knee */
- Direction dir = Directional_element_interface::get (me);
- Direction sdir = Directional_element_interface::get (s);
-
- /* knee */
- if (dir!= sdir)
- {
- stem_y -= dir
- * (thick / 2 + (beam_multiplicity - 1) * interbeam_f);
-
-
-
- // huh, why not for first visible?
- if (Staff_symbol_referencer::staff_symbol_l (s)
- != Staff_symbol_referencer::staff_symbol_l (last_visible_stem (me)))
- stem_y += Directional_element_interface::get (me)
- * (beam_multiplicity - stem_multiplicity) * interbeam_f;
- }
-
- return stem_y;
-}
-
-Real
-Beam::check_stem_length_f (Grob*me,Real y, Real dy)
-{
- Real shorten = 0;
- Real lengthen = 0;
- Direction dir = Directional_element_interface::get (me);
-
- Link_array<Item> stems=
- Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
-
- for (int i=0; i < stems.size (); i++)
- {
- Item* s = stems[i];
- if (Stem::invisible_b (s))
- continue;
-
- Real stem_y = calc_stem_y_f (me, s, y, dy);
-
- stem_y *= dir;
- Stem_info info = Stem::calc_stem_info (s);
-
- // if (0 > info.maxy_f_ - stem_y)
- shorten = shorten <? info.maxy_f_ - stem_y;
- // if (0 < info.miny_f_ - stem_y)
- lengthen = lengthen >? info.miny_f_ - stem_y;
- }
-
- if (lengthen && shorten)
- me->warning (_ ("weird beam vertical offset"));
-
- /* when all stems are too short, normal stems win */
- return dir * ((shorten) ? shorten : lengthen);
-}
-
-/*
- Hmm. At this time, beam position and slope are determined. Maybe,
- stem directions and length should set to relative to the chord's
- position of the beam. */
-void
-Beam::set_stem_lengths (Grob *me)
-{
- if (visible_stem_count (me) <= 1)
- return;
-
- Real y = gh_scm2double (me->get_grob_property ("y"));
- Real dy = gh_scm2double (me->get_grob_property ("dy"));
-
- Real half_space = Staff_symbol_referencer::staff_space (me)/2;
- Link_array<Item> stems=
- Pointer_group_interface__extract_grobs (me, (Item*)0, "stems");
-
- Grob *common = me->common_refpoint (stems[0], Y_AXIS);
- for (int i=1; i < stems.size (); i++)
- if (!Stem::invisible_b (stems[i]))
- common = common->common_refpoint (stems[i], Y_AXIS);
-
- for (int i=0; i < stems.size (); i++)
- {
- Item* s = stems[i];
- if (Stem::invisible_b (s))
- continue;
-
- Real stem_y = calc_stem_y_f (me, s, y, dy);
-
- // doesn't play well with dvips
- if (scm_definedp (ly_symbol2scm ("ps-testing"), SCM_UNDEFINED)
- == SCM_BOOL_T)
- if (Stem::get_direction (s) == Directional_element_interface::get (me))
- stem_y += Stem::get_direction (s)
- * gh_scm2double (me->get_grob_property ("thickness")) / 2;
-
- /* caution: stem measures in staff-positions */
- Real id = me->relative_coordinate (common, Y_AXIS)
- - stems[i]->relative_coordinate (common, Y_AXIS);
- Stem::set_stemend (s, (stem_y + id) / half_space);
- }
-}
-
-/*
- Prevent interference from stafflines and beams.
-
- We only need to quantise the (left) y of the beam,
- since dy is quantised too.
- if extend_b then stems must *not* get shorter
- */
-Real
-Beam::quantise_y_f (Grob*me,Real y, Real dy, int quant_dir)
-{
- int multiplicity = get_multiplicity (me);
-
- Real staff_space = Staff_symbol_referencer::staff_space (me);
- Real thick = me->paper_l ()->get_var ("stafflinethickness");
-
-
- SCM proc = me->get_grob_property ("vertical-position-quant-function");
- SCM quants = scm_apply (proc,
- me->self_scm (),
- scm_list_n (gh_int2scm (multiplicity),
- gh_double2scm (dy/staff_space),
- gh_double2scm (thick/staff_space),
- SCM_EOL, SCM_UNDEFINED));
-
- Array<Real> a;
-
- for (; gh_pair_p (quants); quants = ly_cdr (quants))
- a.push (gh_scm2double (ly_car (quants)));
-
- if (a.size () <= 1)
- return y;
-
- Real up_y = Directional_element_interface::get (me) * y;
- Interval iv = quantise_iv (a, up_y/staff_space) * staff_space;
-
- Real q = up_y - iv[SMALLER] <= iv[BIGGER] - up_y
- ? iv[SMALLER] : iv[BIGGER];
- if (quant_dir)
- q = iv[ (Direction)quant_dir];
-
- return q * Directional_element_interface::get (me);
-}
-
-void
-Beam::set_beaming (Grob*me,Beaming_info_list *beaming)
-{
- Link_array<Grob> stems=
- Pointer_group_interface__extract_grobs (me, (Grob*)0, "stems");
-
- Direction d = LEFT;
- for (int i=0; i < stems.size (); i++)
- {
- do
- {
- /* Don't overwrite user override (?) */
- if (Stem::beam_count (stems[i], d) == 0
- /* Don't set beaming for outside of outer stems */
- && ! (d == LEFT && i == 0)
- && ! (d == RIGHT && i == stems.size () -1))
- {
- int b = beaming->infos_.elem (i).beams_i_drul_[d];
- Stem::set_beaming (stems[i], b, d);
- }
- }
- while (flip (&d) != LEFT);
- }
-}
-
-
-
-/*
- beams to go with one stem.
-
- FIXME: clean me up.
- */
-Molecule
-Beam::stem_beams (Grob*me,Item *here, Item *next, Item *prev,
- Real /* dy */ , Real dydx
- )
-{
- // ugh -> use commonx
- if ((next && ! (next->relative_coordinate (0, X_AXIS) > here->relative_coordinate (0, X_AXIS))) ||
- (prev && ! (prev->relative_coordinate (0, X_AXIS) < here->relative_coordinate (0, X_AXIS))))
- programming_error ("Beams are not left-to-right");
-
- int multiplicity = get_multiplicity (me);
-
- SCM space_proc = me->get_grob_property ("space-function");
- SCM space = gh_call1 (space_proc, gh_int2scm (multiplicity));
-
- Real thick = gh_scm2double (me->get_grob_property ("thickness")) ;
- Real interbeam_f = gh_scm2double (space) ;
-
- Real bdy = interbeam_f;
-
-#if 0
- // ugh -> use commonx
- Real dx = visible_stem_count (me) ?
- last_visible_stem (me)->relative_coordinate (0, X_AXIS) - first_visible_stem (me)->relative_coordinate (0, X_AXIS)
- : 0.0;
-#endif
-
- Molecule leftbeams;
- Molecule rightbeams;
-
- Real nw_f;
- if (!Stem::first_head (here))
- nw_f = 0;
- else {
- int t = Stem::type_i (here);
-
- SCM proc = me->get_grob_property ("flag-width-function");
- SCM result = gh_call1 (proc, gh_int2scm (t));
- nw_f = gh_scm2double (result);
- }
-
-
- 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);
-
-
- /* half beams extending to the left. */
- if (prev)
- {
- int lhalfs= lhalfs = Stem::beam_count (here,LEFT) - Stem::beam_count (prev,RIGHT);
- int lwholebeams= Stem::beam_count (here,LEFT) <? Stem::beam_count (prev,RIGHT) ;
- /*
- Half beam should be one note-width,
- but let's make sure two half-beams never touch
- */
-
- // FIXME: TODO (check) stem width / sloped beams
- Real w = here->relative_coordinate (0, X_AXIS)
- - prev->relative_coordinate (0, X_AXIS);
- Real stem_w = gh_scm2double (prev->get_grob_property ("thickness"))
- // URG
- * me->paper_l ()->get_var ("stafflinethickness");
-
- w = w/2 <? nw_f;
- Molecule a;
- if (lhalfs) // generates warnings if not
- a = Lookup::beam (dydx, w + stem_w, thick);
- a.translate (Offset (-w, -w * dydx));
- a.translate_axis (-stem_w/2, X_AXIS);
- for (int j = 0; j < lhalfs; j++)
- {
- Molecule b (a);
- b.translate_axis (-dir * bdy * (lwholebeams+j), Y_AXIS);
- leftbeams.add_molecule (b);
- }
- }
-
- if (next)
- {
- int rhalfs = Stem::beam_count (here,RIGHT)
- - Stem::beam_count (next,LEFT);
- int rwholebeams= Stem::beam_count (here,RIGHT)
- <? Stem::beam_count (next,LEFT) ;
-
- Real w = next->relative_coordinate (0, X_AXIS)
- - here->relative_coordinate (0, X_AXIS);
-
- Real stem_w = gh_scm2double (next->get_grob_property ("thickness"))
- // URG
- * me->paper_l ()->get_var ("stafflinethickness");
-
- Molecule a = Lookup::beam (dydx, w + stem_w, thick);
- a.translate_axis (- stem_w/2, X_AXIS);
- int j = 0;
- Real gap_f = 0;
-
- SCM gap = me->get_grob_property ("gap");
- if (gh_number_p (gap))
- {
- int gap_i = gh_scm2int ((gap));
- int nogap = rwholebeams - gap_i;
-
- for (; j < nogap; j++)
- {
- Molecule b (a);
- b.translate_axis (-dir * bdy * j, Y_AXIS);
- rightbeams.add_molecule (b);
- }
- if (Stem::invisible_b (here))
- gap_f = nw_f;
- else
- gap_f = nw_f / 2;
- w -= 2 * gap_f;
- a = Lookup::beam (dydx, w + stem_w, thick);
- }
-
- for (; j < rwholebeams; j++)
- {
- Molecule b (a);
- Real tx = 0;
- if (Stem::invisible_b (here))
- // ugh, see chord-tremolo.ly
- tx = (-dir + 1) / 2 * nw_f * 1.5 + gap_f/4;
- else
- tx = gap_f;
- b.translate (Offset (tx, -dir * bdy * j));
- rightbeams.add_molecule (b);
- }
-
- w = w/2 <? nw_f;
- if (rhalfs)
- a = Lookup::beam (dydx, w, thick);
-
- for (; j < rwholebeams + rhalfs; j++)
- {
- Molecule b (a);
- b.translate_axis (- dir * bdy * j, Y_AXIS);
- rightbeams.add_molecule (b);
- }
-
- }
- leftbeams.add_molecule (rightbeams);
-
- /*
- Does beam quanting think of the asymetry of beams?
- Refpoint is on bottom of symbol. (FIXTHAT) --hwn.
- */
- return leftbeams;
-}
-
-MAKE_SCHEME_CALLBACK (Beam,brew_molecule,1);
-SCM
-Beam::brew_molecule (SCM smob)
-{
- Grob * me =unsmob_grob (smob);
-
- Molecule mol;
- if (!gh_pair_p (me->get_grob_property ("stems")))
- return SCM_EOL;
- Real x0,dx;
- Link_array<Item>stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
- if (visible_stem_count (me))
- {
- // ugh -> use commonx
- x0 = first_visible_stem (me)->relative_coordinate (0, X_AXIS);
- dx = last_visible_stem (me)->relative_coordinate (0, X_AXIS) - x0;
- }
- else
- {
- x0 = stems[0]->relative_coordinate (0, X_AXIS);
- dx = stems.top ()->relative_coordinate (0, X_AXIS) - x0;
- }
-
-
-
- /*
- TODO: the naming of the grob properties sucks.
- */
- SCM dy_s = me->get_grob_property ("dy");
- SCM y_s = me->get_grob_property ("y");
-
-
- Real dy = gh_number_p (dy_s) ? gh_scm2double (dy_s) : 0.0;
- Real dydx = dy && dx ? dy/dx : 0;
- Real y = gh_number_p (y_s) ? gh_scm2double (y_s) : 0.0;
-
-
- for (int j=0; j <stems.size (); j++)
- {
- Item *i = stems[j];
- Item * prev = (j > 0)? stems[j-1] : 0;
- Item * next = (j < stems.size ()-1) ? stems[j+1] :0;
-
- Molecule sb = stem_beams (me, i, next, prev, dy, dydx);
- Real x = i->relative_coordinate (0, X_AXIS)-x0;
- sb.translate (Offset (x, x * dydx + y));
- mol.add_molecule (sb);
- }
- mol.translate_axis (x0
- - dynamic_cast<Spanner*> (me)->get_bound (LEFT)->relative_coordinate (0, X_AXIS), X_AXIS);
-
- return mol.smobbed_copy ();
-}
-
-int
-Beam::forced_stem_count (Grob*me)
-{
- Link_array<Item>stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
- int f = 0;
- for (int i=0; i < stems.size (); i++)
- {
- Item *s = stems[i];
-
- if (Stem::invisible_b (s))
- continue;
-
- if (( (int)Stem::chord_start_f (s))
- && (Stem::get_direction (s) != Stem::get_default_dir (s)))
- f++;
- }
- return f;
-}
-
-
-
-
-/* TODO:
- use filter and standard list functions.
- */
-int
-Beam::visible_stem_count (Grob*me)
-{
- Link_array<Item>stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
- int c = 0;
- for (int i = stems.size (); i--;)
- {
- if (!Stem::invisible_b (stems[i]))
- c++;
- }
- return c;
-}
-
-Item*
-Beam::first_visible_stem (Grob*me)
-{
- Link_array<Item>stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
-
- for (int i = 0; i < stems.size (); i++)
- {
- if (!Stem::invisible_b (stems[i]))
- return stems[i];
- }
- return 0;
-}
-
-Item*
-Beam::last_visible_stem (Grob*me)
-{
- Link_array<Item>stems =
- Pointer_group_interface__extract_grobs (me, (Item*) 0, "stems");
- for (int i = stems.size (); i--;)
- {
- if (!Stem::invisible_b (stems[i]))
- return stems[i];
- }
- return 0;
-}
-
-
-/*
- [TODO]
- handle rest under beam (do_post: beams are calculated now)
- what about combination of collisions and rest under beam.
-
- Should lookup
-
- rest -> stem -> beam -> interpolate_y_position ()
-*/
-MAKE_SCHEME_CALLBACK (Beam,rest_collision_callback,2);
-SCM
-Beam::rest_collision_callback (SCM element_smob, SCM axis)
-{
- Grob *rest = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
-
- assert (a == Y_AXIS);
-
- Grob * st = unsmob_grob (rest->get_grob_property ("stem"));
- Grob * stem = st;
- if (!stem)
- return gh_double2scm (0.0);
- Grob * beam = unsmob_grob (stem->get_grob_property ("beam"));
- if (!beam || !Beam::has_interface (beam) || !Beam::visible_stem_count (beam))
- return gh_double2scm (0.0);
-
- // make callback for rest from this.
- Real beam_dy = 0;
- Real beam_y = 0;
-
-
- // todo: make sure this calced already.
- SCM s = beam->get_grob_property ("dy");
- if (gh_number_p (s))
- beam_dy = gh_scm2double (s);
-
- s = beam->get_grob_property ("y");
- if (gh_number_p (s))
- beam_y = gh_scm2double (s);
-
- // ugh -> use commonx
- Real x0 = first_visible_stem (beam)->relative_coordinate (0, X_AXIS);
- Real dx = last_visible_stem (beam)->relative_coordinate (0, X_AXIS) - x0;
- Real dydx = beam_dy && dx ? beam_dy/dx : 0;
-
- Direction d = Stem::get_direction (stem);
- Real beamy = (stem->relative_coordinate (0, X_AXIS) - x0) * dydx + beam_y;
-
- Real staff_space = Staff_symbol_referencer::staff_space (rest);
-
-
- Real rest_dim = rest->extent (rest, Y_AXIS)[d]*2.0 / staff_space ; // refp??
-
- Real minimum_dist
- = gh_scm2double (rest->get_grob_property ("minimum-beam-collision-distance"));
- Real dist =
- minimum_dist + -d * (beamy - rest_dim) >? 0;
-
- int stafflines = Staff_symbol_referencer::line_count (rest);
-
- // move discretely by half spaces.
- int discrete_dist = int (ceil (dist));
-
- // move by whole spaces inside the staff.
- if (discrete_dist < stafflines+1)
- discrete_dist = int (ceil (discrete_dist / 2.0)* 2.0);
-
- return gh_double2scm (-d * discrete_dist);
-}
-
-
-bool
-Beam::has_interface (Grob*me)
-{
- return me->has_interface (ly_symbol2scm ("beam-interface"));
-}
-
a little baroque, but it might come in handy later on?
*/
-
class Spacing_spanner
{
public:
static Rational find_shortest (Link_array<Grob> const &);
static void breakable_column_spacing (Item* l, Item *r);
static void find_loose_columns () {}
- static void prune_loose_colunms (Link_array<Grob> *cols);
+ static void prune_loose_colunms (Grob*,Link_array<Grob> *cols, Rational);
static void find_loose_columns (Link_array<Grob> cols);
static void set_explicit_neighbor_columns (Link_array<Grob> cols);
static void set_implicit_neighbor_columns (Link_array<Grob> cols);
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 ));
};
the column containing the clef is really loose, and should be
attached right to the first column, but that is a lot of work for
- such a borderline case.
-
- )
+ such a borderline case.)
*/
if (!gh_pair_p (lns) || !gh_pair_p (rns))
some cases (two isolated, consecutive clef changes) won't be
nicely folded, but hey, then don't do that.
*/
- if( (Paper_column::musical_b (l_neighbor) || Item::breakable_b (l_neighbor))
+ if ((Paper_column::musical_b (l_neighbor) || Item::breakable_b (l_neighbor))
&& (Paper_column::musical_b (r_neighbor) || Item::breakable_b (r_neighbor)))
{
return true;
between.
*/
void
-Spacing_spanner::prune_loose_colunms (Link_array<Grob> *cols)
+Spacing_spanner::prune_loose_colunms (Grob*me,Link_array<Grob> *cols, Rational shortest)
{
Link_array<Grob> newcols;
-
+ Real increment = gh_scm2double (me->get_grob_property ("spacing-increment"));
for (int i=0; i < cols->size (); i++)
{
if (Item::breakable_b (cols->elem(i)) || Paper_column::musical_b (cols->elem (i)))
do
{
dists[d] = 0.0;
- Grob *lc = (d == LEFT) ? next_door[LEFT] : c;
- Grob *rc = d == LEFT ? c : next_door[RIGHT];
+ Item *lc = dynamic_cast<Item*> ((d == LEFT) ? next_door[LEFT] : c);
+ Item *rc = dynamic_cast<Item*> (d == LEFT ? c : next_door[RIGHT]);
for (SCM s = lc->get_grob_property ("spacing-wishes");
gh_pair_p (s); s = gh_cdr (s))
|| Note_spacing::right_column (sp) != rc)
continue;
- dists[d] = dists[d] >? Note_spacing::get_spacing (sp);
+ Real space, fixed;
+ fixed = 0.0;
+ bool expand_only;
+ Real base = note_spacing (me, lc, rc, shortest, &expand_only);
+ Note_spacing::get_spacing (sp, rc, base, increment, &space, &fixed);
+ space -=base;
+
+ dists[d] = dists[d] >? space;
}
}
while (flip (&d) != LEFT);
Link_array<Grob> all (me->pscore_l_->line_l_->column_l_arr ()) ;
set_explicit_neighbor_columns (all);
- prune_loose_colunms (&all);
- set_implicit_neighbor_columns (all);
Rational global_shortest = find_shortest (all);
+ prune_loose_colunms (me, &all, global_shortest);
+ set_implicit_neighbor_columns (all);
+
int j = 0;
for (int i = 1; i < all.size (); i++)
continue ;
}
- bool expand_only = false;
- Real note_space = note_spacing (me, lc, rc, shortest, &expand_only);
-
- Real hinterfleisch = note_space;
-
-
- SCM seq = lc->get_grob_property ("right-neighbors");
- /*
- hinterfleisch = hind-meat = amount of space following a note.
-
-
- We adjust the space following a note only if the next note
- happens after the current note (this is set in the grob
- property SPACING-SEQUENCE. */
- Real stretch_distance = note_space;
+ musical_column_spacing (me, lc, rc, headwid, shortest);
+ if (Item *rb = r->find_prebroken_piece (LEFT))
+ musical_column_spacing (me, lc, rb, headwid, shortest);
+ }
+}
- hinterfleisch = -1.0;
- Real max_factor = 0.0;
- for (SCM s = seq; gh_pair_p (s); s = ly_cdr (s))
- {
- Grob * wish = unsmob_grob (gh_car (s));
+void
+Spacing_spanner::musical_column_spacing (Grob *me, Item * lc, Item *rc, Real increment, Rational shortest)
+{
+ bool expand_only = false;
+ Real base_note_space = note_spacing (me, lc, rc, shortest, &expand_only);
- if (Note_spacing::left_column (wish) != lc
- || Note_spacing::right_column (wish) != rc)
- continue;
+ Real max_note_space = -infinity_f;
+ Real max_fixed_note_space = -infinity_f;
- /*
- This is probably a waste of time in the case of polyphonic
- music. */
- if (Note_spacing::has_interface (wish))
- {
- hinterfleisch = hinterfleisch >?
- ( - headwid +
+ SCM seq = lc->get_grob_property ("right-neighbors");
- (note_space + Note_spacing::get_spacing (wish))
- *gh_scm2double (wish->get_grob_property ("space-factor"))
+ /*
+ We adjust the space following a note only if the next note
+ happens after the current note (this is set in the grob
+ property SPACING-SEQUENCE.
+ */
+ for (SCM s = seq; gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * wish = unsmob_grob (gh_car (s));
- + Note_spacing::stem_dir_correction (wish));
- }
- }
+ Item *wish_rcol = Note_spacing::right_column (wish);
+ if (Note_spacing::left_column (wish) != lc
+ || (wish_rcol != rc && wish_rcol != rc->original_l_))
+ continue;
- if (hinterfleisch < 0)
+ /*
+ This is probably a waste of time in the case of polyphonic
+ music. */
+ if (Note_spacing::has_interface (wish))
{
- // maybe should issue a programming error.
- hinterfleisch = note_space;
+ Real space =0.0;
+ Real fixed =0.0;
+
+ Note_spacing::get_spacing (wish, rc, base_note_space, increment, &space, &fixed);
+ max_note_space = max_note_space >? space;
+ max_fixed_note_space = max_fixed_note_space >? fixed;
}
- else
- stretch_distance -= headwid; // why?
- if (max_factor == 0.0)
- max_factor = 1.0;
-
- Spaceable_grob::add_spring (l, r, max_factor * hinterfleisch, 1 / stretch_distance, expand_only);
+ }
- /*
- TODO: we should have a separate routine determining this distance!
- */
- if (Item *rb = r->find_prebroken_piece (LEFT))
- {
- Spaceable_grob::add_spring (l, rb, max_factor * hinterfleisch, 1 / stretch_distance, expand_only);
- }
+ if (max_note_space < 0)
+ {
+ max_note_space = base_note_space;
+ max_fixed_note_space = increment;
}
+ Spaceable_grob::add_spring (lc, rc, max_note_space, 1 / (max_note_space -max_fixed_note_space), expand_only);
}
+
/*
Read hints from L (todo: R) and generate springs.
*/
for (SCM s = l->get_grob_property ("spacing-wishes");
gh_pair_p (s); s = gh_cdr (s))
{
- Grob * spacing_grob = unsmob_grob (gh_car (s));
+ Item * spacing_grob = dynamic_cast<Item*> (unsmob_grob (gh_car (s)));
if (!spacing_grob || !Staff_spacing::has_interface (spacing_grob))
continue;
Real space;
Real fixed_space;
+ /*
+ column for the left one settings should be ok due automatic
+ pointer munging.
+
+ */
+ assert (spacing_grob-> column_l () == l);
+
Staff_spacing::get_spacing_params (spacing_grob,
&space, &fixed_space);
if (space > max_space)
max_fixed = 1.0;
}
+
+ if (l->break_status_dir() == RIGHT
+ && Paper_column::when_mom (l) == Paper_column::when_mom (r))
+ {
+ /* Start of line: this space is not stretchable */
+ max_fixed = max_space;
+ }
+
+ /*
+ Hmm. we do 1/0 in the next thing. Perhaps we should check if this
+ works on all architectures.
+ */
+
Spaceable_grob::add_spring (l, r, max_space, 1/(max_space - max_fixed), false);
}
projects / lilypond.git / commitdiff