TODO: This is way too hairy
*/
-
+#include "directional-element-interface.hh"
#include "dimension-cache.hh"
#include "stem.hh"
#include "debug.hh"
#include "group-interface.hh"
#include "cross-staff.hh"
#include "staff-symbol-referencer.hh"
+#include "lily-guile.icc"
void
return 0;
}
-Interval_t<int>
+Interval
Stem::head_positions () const
{
- /*
- Mysterious FreeBSD fix by John Galbraith. Somehow, the empty intervals
- trigger FP exceptions on FreeBSD. Fix: do not return infinity
-
- */
- if (!first_head ())
+ if (!heads_i ())
{
- return Interval_t<int> (100,-100);
+ Interval iv;
+ return iv;
}
- Link_array<Note_head> head_l_arr =
- Group_interface__extract_elements (this, (Note_head*)0, "heads");
- Interval_t<int> r;
- for (int i =0; i < head_l_arr.size (); i++)
- {
- Staff_symbol_referencer_interface si (head_l_arr[i]);
- int p = (int)si.position_f ();
- r[BIGGER] = r[BIGGER] >? p;
- r[SMALLER] = r[SMALLER] <? p;
- }
- return r;
+ Drul_array<Note_head*> e (extremal_heads ());
+
+ return Interval (staff_symbol_referencer_interface (e[DOWN]).position_f (),
+ staff_symbol_referencer_interface( e[UP]).position_f ());
}
Stem::stem_end_position () const
{
SCM p =get_elt_property ("stem-end-position");
- Real len;
+ Real pos;
if (!gh_number_p (p))
{
Stem * me = (Stem*) this;
- len = get_default_stemlen ();
-
- // FIXME: len != position
- me->set_elt_property ("stem-end-position", gh_double2scm (len));
+ pos = get_default_stem_end_position ();
+ me->set_elt_property ("stem-end-position", gh_double2scm (pos));
}
else
- len = gh_scm2double (p);
+ pos = gh_scm2double (p);
+
+ return pos;
+}
- return len;
+Direction
+Stem::get_direction () const
+{
+ Direction d = directional_element (this).get ();
+
+ if (!d)
+ {
+ Stem * me = (Stem*) this;
+ d = get_default_dir ();
+ directional_element (me).set (d);
+ }
+ return d ;
}
+
void
Stem::set_stemend (Real se)
{
return first_head () ? first_head ()->balltype_i () : 2;
}
-
-
/*
Note head that determines hshift for upstems
*/
Score_element * nh = unsmob_element (h);
if (nh)
return nh;
+ else if (heads_i () == 1)
+ {
+ /*
+ UGH.
+ */
+
+ return unsmob_element (gh_car (get_elt_property ("heads")));
+ }
else
return first_head ();
}
+int
+Stem::heads_i ()const
+{
+ Group_interface gi (this, "heads");
+ return gi.count ();
+}
+
/*
The note head which forms one end of the stem.
*/
Note_head*
Stem::first_head () const
{
- const int inf = 1000000;
- int pos = -inf;
- Direction dir = get_direction ();
+ return extremal_heads ()[-get_direction ()];
+}
- Note_head *nh =0;
+/*
+ START is part where stem reaches `last' head.
+ */
+Drul_array<Note_head*>
+Stem::extremal_heads () const
+{
+ const int inf = 1000000;
+ Drul_array<int> extpos;
+ extpos[DOWN] = inf;
+ extpos[UP] = -inf;
+
+ Drul_array<Note_head *> exthead;
+ exthead[LEFT] = exthead[RIGHT] =0;
+
for (SCM s = get_elt_property ("heads"); gh_pair_p (s); s = gh_cdr (s))
{
Note_head * n = dynamic_cast<Note_head*> (unsmob_element (gh_car (s)));
Staff_symbol_referencer_interface si (n);
- int p = dir * int(si.position_f ());
- if (p > pos)
+
+ int p = int(si.position_f ());
+
+ Direction d = LEFT;
+ do {
+ if (d* p > d* extpos[d])
{
- nh = n;
- pos = p;
+ exthead[d] = n;
+ extpos[d] = p;
}
+ } while (flip (&d) != DOWN);
}
- return nh;
+ return exthead;
}
void
Stem::add_head (Rhythmic_head *n)
{
n->set_elt_property ("stem", this->self_scm_);
- n->add_dependency (this); // ?
-
+ n->add_dependency (this);
Group_interface gi (this);
if (Note_head *nh = dynamic_cast<Note_head *> (n))
bool
Stem::invisible_b () const
{
- return !(first_head () && first_head()->balltype_i () >= 1);
+ /*
+ UGH. Who determines balltype for stem?
+ */
+ Note_head * nh = dynamic_cast<Note_head*> (support_head ());
+ return !(heads_i () && nh->balltype_i () >= 1);
}
int
Stem::get_center_distance (Direction d) const
{
int staff_center = 0;
- int distance = d*(head_positions()[d] - staff_center);
+ int distance = (int) (d*(head_positions()[d] - staff_center));
return distance >? 0;
}
}
Real
-Stem::get_default_stemlen () const
+Stem::get_default_stem_end_position () const
{
+ bool grace_b = get_elt_property ("grace") != SCM_UNDEFINED;
+ String type_str = grace_b ? "grace-" : "";
+ SCM s;
+ Array<Real> a;
+
Real length_f = 0.;
SCM scm_len = get_elt_property("length");
if (gh_number_p (scm_len))
length_f = gh_scm2double (scm_len);
}
else
- length_f = paper_l ()->get_var ("stem_length0");
+ {
+ s = ly_eval_str (type_str + "stem-length");
+ scm_to_array (s, &a);
+ // stem uses half-spaces
+ length_f = a[((flag_i () - 2) >? 0) <? (a.size () - 1)] * 2;
+ }
- bool grace_b = get_elt_property ("grace") != SCM_UNDEFINED;
- String type_str = grace_b ? "grace_" : "";
- Real shorten_f = paper_l ()->get_var (type_str + "forced_stem_shorten0");
+ s = ly_eval_str (type_str + "stem-shorten");
+ scm_to_array (s, &a);
+
+ // stem uses half-spaces
+ Real shorten_f = a[((flag_i () - 2) >? 0) <? (a.size () - 1)] * 2;
/* URGURGURG
'set-default-stemlen' sets direction too
Direction dir = get_direction ();
if (!dir)
{
- Stem * me = (Stem*) this;
dir = get_default_dir ();
- me->set_direction (dir);
+ directional_element (this).set (dir);
}
/*
&& (get_direction () != get_default_dir ()))
length_f -= shorten_f;
- /*
- UGK.!
- */
- if (flag_i () >= 5)
- length_f += 2.0;
- if (flag_i () >= 6)
- length_f += 1.0;
-
+ Real st = head_positions()[dir] + dir * length_f;
- Real st = head_positions()[-dir] + dir * length_f;
-
- bool no_extend_b = get_elt_property ("no-stem-extend") != SCM_UNDEFINED;
- if (!grace_b && !no_extend_b && dir * st < 0)
- st = 0.0;
+ bool no_extend_b = to_boolean (get_elt_property ("no-stem-extend"));
+ if (!grace_b && !no_extend_b && dir * st < 0)
+ st = 0.0;
return st;
}
+/*
+ FIXME: wrong name
+ */
int
Stem::flag_i () const
{
void
Stem::position_noteheads ()
{
- if (!first_head ())
+ if (!heads_i ())
return;
Link_array<Score_element> heads =
void
Stem::do_pre_processing ()
{
- get_default_stemlen (); // ugh. Trigger direction calc.
+ stem_end_position (); // ugh. Trigger direction calc.
position_noteheads ();
if (invisible_b ())
{
assert (beam_l ());
- Direction beam_dir = beam_l ()->get_direction ();
+ Direction beam_dir = directional_element (beam_l ()).get ();
if (!beam_dir)
{
programming_error ("Beam dir not set.");
beam_dir = UP;
}
- Stem_info info;
- Real internote_f
- = staff_symbol_referencer_interface (this).staff_space ()/2;
+ Staff_symbol_referencer_interface st (this);
+ Real staff_space = st.staff_space ();
+ Real half_space = staff_space / 2;
Real interbeam_f = paper_l ()->interbeam_f (beam_l ()->get_multiplicity ());
- Real beam_f = gh_scm2double (beam_l ()->get_elt_property ("beam-thickness"));
-
+ Real thick = gh_scm2double (beam_l ()->get_elt_property ("beam-thickness"));
+ int multiplicity = beam_l ()->get_multiplicity ();
+
+ Stem_info info;
info.idealy_f_ = chord_start_f ();
// for simplicity, we calculate as if dir == UP
info.idealy_f_ *= beam_dir;
SCM grace_prop = get_elt_property ("grace");
- bool grace_b = gh_boolean_p (grace_prop) && gh_scm2bool (grace_prop);
- SCM extend_prop = get_elt_property ("no-stem-extend");
- bool no_extend_b = gh_boolean_p (extend_prop) && gh_scm2bool (extend_prop);
-
- int stem_max = (int)rint(paper_l ()->get_var ("stem_max"));
- String type_str = grace_b ? "grace_" : "";
- Real min_stem_f = paper_l ()->get_var (type_str + "minimum_stem_length"
- + to_str (beam_l ()->get_multiplicity () <? stem_max)) * internote_f;
- Real stem_f = paper_l ()->get_var (type_str + "stem_length"
- + to_str (beam_l ()->get_multiplicity () <? stem_max)) * internote_f;
-
- if (!beam_dir || (beam_dir == get_direction ()))
+
+ bool grace_b = to_boolean (grace_prop);
+
+ Array<Real> a;
+ SCM s;
+ String type_str = grace_b ? "grace-" : "";
+
+ s = ly_eval_str (type_str + "beamed-stem-minimum-length");
+ scm_to_array (s, &a);
+ Real minimum_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+
+ s = ly_eval_str (type_str + "beamed-stem-length");
+ scm_to_array (s, &a);
+ Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
+
+ if (!beam_dir || (beam_dir == directional_element (this).get ()))
/* normal beamed stem */
{
- if (beam_l ()->get_multiplicity ())
+ if (multiplicity)
{
- info.idealy_f_ += beam_f
- + (beam_l ()->get_multiplicity () - 1) * interbeam_f;
+ info.idealy_f_ += thick + (multiplicity - 1) * interbeam_f;
}
info.miny_f_ = info.idealy_f_;
info.maxy_f_ = INT_MAX;
- info.idealy_f_ += stem_f;
- info.miny_f_ += min_stem_f;
+ info.idealy_f_ += stem_length;
+ info.miny_f_ += minimum_length;
/*
lowest beam of (UP) beam must never be lower than second staffline
than middle staffline, just as normal stems.
*/
+ bool no_extend_b = to_boolean (get_elt_property ("no-stem-extend"));
if (!grace_b && !no_extend_b)
{
- /* highest beam of (UP) beam must never be lower than middle staffline
-
+ /* 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.miny_f_ =
info.miny_f_ >? 0
- >? (- 2 * internote_f - beam_f
- + (beam_l ()->get_multiplicity () > 0) * beam_f
- + interbeam_f * (beam_l ()->get_multiplicity () - 1));
+ >? (- 2 * half_space - thick
+ + (multiplicity > 0) * thick
+ + interbeam_f * (multiplicity - 1));
}
}
else
/* knee */
{
- info.idealy_f_ -= beam_f;
+ info.idealy_f_ -= thick;
info.maxy_f_ = info.idealy_f_;
info.miny_f_ = -INT_MAX;
- info.idealy_f_ -= stem_f;
- info.maxy_f_ -= min_stem_f;
+ info.idealy_f_ -= stem_length;
+ info.maxy_f_ -= minimum_length;
}
info.idealy_f_ = (info.maxy_f_ <? info.idealy_f_) >? info.miny_f_;
- SCM s = beam_l ()->get_elt_property ("shorten");
+ s = beam_l ()->get_elt_property ("shorten");
if (gh_number_p (s))
info.idealy_f_ -= gh_double2scm (s);
- Real interstaff_f = beam_dir* calc_interstaff_dist (this, beam_l ());
+ Real interstaff_f = -beam_dir* calc_interstaff_dist (this, beam_l ());
info.idealy_f_ += interstaff_f;
info.miny_f_ += interstaff_f;
#include "note-column.hh"
#include "dimensions.hh"
#include "group-interface.hh"
+#include "directional-element-interface.hh"
num.align_to (X_AXIS, CENTER);
num.translate_axis (w/2, X_AXIS);
Real interline = paper_l ()->get_var ("interline");
- Real dy = column_arr.top ()->extent (Y_AXIS) [get_direction ()]
- - column_arr[0]->extent (Y_AXIS) [get_direction ()];
+
+ Direction dir = directional_element (this).get ();
+ Real dy = column_arr.top ()->extent (Y_AXIS) [dir]
+ - column_arr[0]->extent (Y_AXIS) [dir];
num.align_to (Y_AXIS, CENTER);
- num.translate_axis (get_direction () * interline, Y_AXIS);
+ num.translate_axis (dir * interline, Y_AXIS);
num.translate_axis (dy/2, Y_AXIS);
{
Real gap = paper_l () -> get_var ("tuplet_spanner_gap");
- mol_p->add_molecule (lookup_l ()->tuplet_bracket (dy, w, thick, gap, interline, get_direction ()));
+ mol_p->add_molecule (lookup_l ()->tuplet_bracket (dy, w, thick, gap, interline, dir));
}
if (number_visibility)
{
mol_p->add_molecule (num);
}
- mol_p->translate_axis (get_direction () * interline, Y_AXIS);
+ mol_p->translate_axis (dir * interline, Y_AXIS);
}
return mol_p;
}
Group_interface__extract_elements (this, (Note_column*)0, "columns");
+ Direction d = directional_element (this).get ();
+ if (!d)
+ {
+ d = UP;
+ directional_element (this).set (d);
+ }
+
if (column_arr.size())
- translate_axis (column_arr[0]->extent (Y_AXIS)[get_direction ()], Y_AXIS);
+ translate_axis (column_arr[0]->extent (Y_AXIS)[d], Y_AXIS);
if (scm_ilength (get_elt_property ("beams")) == 1)
--- /dev/null
+;;; paper.scm -- scm paper variables and functions
+;;;
+;;; source file of the GNU LilyPond music typesetter
+;;;
+;;; (c) 1999 Jan Nieuwenhuizen <janneke@gnu.org>
+
+;;; All dimensions are measured in staff-spaces
+
+
+
+;; Beams should be prevented to conflict with the stafflines,
+;; especially at small slopes
+;; ----------------------------------------------------------
+;; ########
+;; ########
+;; ########
+;; --------------########------------------------------------
+;; ########
+;;
+;; hang straddle sit inter hang
+
+;; inter seems to be a modern quirk, we don't use that
+
+(define staff-line 0.10)
+(define beam-thickness (* 0.52 (- 1 staff-line)))
+(define beam-straddle 0)
+(define beam-sit (/ (+ beam-thickness staff-line) 2))
+(define beam-hang (- 1 (/ (- beam-thickness staff-line) 2)))
+
+(define beam-normal-dy-quants
+ (list 0 (/ (+ beam-thickness staff-line) 2) (+ beam-thickness staff-line) 1))
+
+;; two popular veritcal beam quantings
+;; see params.ly: #'beam-vertical-quants
+(define (beam-normal-y-quants multiplicity dy)
+ (let ((quants (list beam-hang 1)))
+ (if (or (<= multiplicity 1) (>= (abs dy) (/ staff-line 2)))
+ (set! quants (cons beam-sit quants)))
+ (if (or (<= multiplicity 2) (>= (abs dy) (/ staff-line 2)))
+ (set! quants (cons beam-straddle quants)))
+ quants))
+
+(define (beam-traditional-y-quants multiplicity dy)
+ (let ((quants '(1)))
+ (if (>= dy (/ staff-line -2))
+ (set! quants (cons beam-hang quants)))
+ (if (and (<= multiplicity 1) (<= dy (/ staff-line 2)))
+ (set! quants (cons beam-sit quants)))
+ (if (or (<= multiplicity 2) (>= (abs dy) (/ staff-line 2)))
+ (set! quants (cons beam-straddle quants)))
+ quants))
+
+
+;; There are several ways to calculate the direction of a beam
+;;
+;; * majority: number count of up or down notes
+;; * mean : mean centre distance of all notes
+;; * median : mean centre distance weighted per note
+
+(define (dir-compare up down)
+ (if (= up down)
+ 0
+ (if (> up down)
+ 1
+ -1)))
+
+;; (up . down)
+(define (beam-dir-majority count total)
+ (dir-compare (car count) (cdr count)))
+
+(define (beam-dir-mean count total)
+ (dir-compare (car total) (cdr total)))
+
+(define (beam-dir-median count total)
+ (if (and (> (car count) 0)
+ (> (cdr count) 0))
+ (dir-compare (/ (car total) (car count)) (/ (cdr total) (cdr count)))
+ (dir-compare (car count) (cdr count))))
+
+
+;;; Default variables and settings
+
+(define beam-height-quants beam-normal-dy-quants)
+(define beam-vertical-position-quants beam-normal-y-quants)
+
+
+;; [Ross] states that the majority of the notes dictates the
+;; direction (and not the mean of "center distance")
+;;
+;; But is that because it really looks better, or because he wants
+;; to provide some real simple hands-on rules?
+;;
+;; We have our doubts, so we simply provide all sensible alternatives.
+(define beam-dir-algorithm beam-dir-majority)
+
+
+;; array index flag-2 (what a name!!), last if index>size
+;; unbeamed stems
+(define stem-length '(3.5 3.5 3.5 4.5 5.0))
+(define grace-length-factor 0.8)
+(define grace-stem-length
+ (map (lambda (x) (* grace-length-factor x)) stem-length))
+
+;; array index multiplicity, last if index>size
+;; beamed stems
+(define beamed-stem-shorten '(0.5))
+(define beamed-stem-length '(0.0 2.5 2.0 1.5))
+(define grace-beamed-stem-length '(0.0 2.5 2.0 1.5))
+(define beamed-stem-minimum-length '(0.0 1.5 1.25 1.0))
+(define grace-beamed-stem-minimum-length
+ (map (lambda (x) (* grace-length-factor x)) beamed-stem-minimum-length))
+
+;; Stems in unnatural (forced) direction should be shortened,
+;; according to [Roush & Gourlay]. Their suggestion to knock off
+;; a whole staffspace seems a bit drastical: we'll do half.
+
+;; TODO
+;; - take #forced stems into account (now done in C++)?
+;; - take y-position of chord or beam into account
+
+(define stem-shorten '(0.5))
+(define grace-stem-shorten '(0.0))
projects / lilypond.git / commitdiff