source file of the GNU LilyPond music typesetter
- (c) 1996--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
*/
+
#include <math.h> // m_pi
#include "lookup.hh"
if (!gh_pair_p (pair))
{
- pair = gh_cons (gh_int2scm (0),gh_int2scm (0));
+ pair = gh_cons (gh_int2scm (-1),gh_int2scm (-1));
me-> set_grob_property ("beaming", pair);
}
index_set_cell (pair, d, gh_int2scm (i));
if (gh_pair_p (p))
return gh_scm2int (index_cell (p,d));
else
- return 0;
+ return -1;
}
Interval
Real pos;
if (!gh_number_p (p))
{
-
pos = get_default_stem_end_position (me);
me->set_grob_property ("stem-end-position", gh_double2scm (pos));
}
Direction d= get_direction (me);
if (d && d * head_positions (me)[get_direction (me)] >= se*d)
- warning (_ ("Weird stem size; check for narrow beams"));
+ me->warning (_ ("Weird stem size; check for narrow beams"));
me->set_grob_property ("stem-end-position", gh_double2scm (se));
}
UGH.
*/
- return unsmob_grob (gh_car (me->get_grob_property ("heads")));
+ return unsmob_grob (ly_car (me->get_grob_property ("heads")));
}
else
return first_head (me);
Drul_array<Grob *> exthead;
exthead[LEFT] = exthead[RIGHT] =0;
- for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = gh_cdr (s))
+ for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = ly_cdr (s))
{
- Grob * n = unsmob_grob (gh_car (s));
+ Grob * n = unsmob_grob (ly_car (s));
int p = int (Staff_symbol_referencer::position_f (n));
return exthead;
}
+static int
+icmp (int const &a, int const &b)
+{
+ return a-b;
+}
+
+Array<int>
+Stem::note_head_positions (Grob *me)
+{
+ Array<int> ps ;
+ for (SCM s = me->get_grob_property ("heads"); gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * n = unsmob_grob (ly_car (s));
+ int p = int (Staff_symbol_referencer::position_f (n));
+
+ ps.push (p);
+ }
+
+ ps.sort (icmp);
+ return ps;
+}
+
+
void
Stem::add_head (Grob*me, Grob *n)
{
if (Note_head::has_interface (n))
{
- Pointer_group_interface::add_element (me, "heads",n);
- }
- else
- {
- n->set_grob_property ("rest", n->self_scm ());
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("heads"), n);
}
}
else
{
s = me->get_grob_property ("lengths");
- for (SCM q = s; q != SCM_EOL; q = gh_cdr (q))
- a.push (gh_scm2double (gh_car (q)));
+ for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
+ a.push (gh_scm2double (ly_car (q)));
// stem uses half-spaces
length_f = a[ ((flag_i (me) - 2) >? 0) <? (a.size () - 1)] * 2;
a.clear ();
s = me->get_grob_property ("stem-shorten");
- for (SCM q = s; gh_pair_p (q); q = gh_cdr (q))
- a.push (gh_scm2double (gh_car (q)));
+ for (SCM q = s; gh_pair_p (q); q = ly_cdr (q))
+ a.push (gh_scm2double (ly_car (q)));
// stem uses half-spaces
- // fixme: use gh_list_ref () iso. array[]
+ // fixme: use scm_list_n_ref () iso. array[]
Real shorten_f = a[ ((flag_i (me) - 2) >? 0) <? (a.size () - 1)] * 2;
+ /* On boundary: shorten only half */
+ if (abs (chord_start_f (me)) == 0.5)
+ shorten_f *= 0.5;
+
/* URGURGURG
'set-default-stemlen' sets direction too
*/
Directional_element_interface::set (me, dir);
}
- /*
- stems in unnatural (forced) direction should be shortened,
- according to [Roush & Gourlay]
- */
- if (( (int)chord_start_f (me))
+ /* stems in unnatural (forced) direction should be shortened,
+ according to [Roush & Gourlay] */
+ if (chord_start_f (me)
&& (get_direction (me) != get_default_dir (me)))
length_f -= shorten_f;
which should be a dot-column.
*/
if (dir * (st + flagy - dp) < 0.5)
- Side_position_interface::add_support (dots->parent_l (X_AXIS), me);
+ Side_position_interface::add_support (dots->get_parent (X_AXIS), me);
/*
previous approach was to lengthen the stem. This is not
bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend"));
- if (!grace_b && !no_extend_b && dir * st < 0) // junkme?
- st = 0.0;
+ if (!grace_b && !no_extend_b && dir * st < 0) // junkme?
+ st = 0.0;
return st;
}
+
+
/*
Number of hooks on the flag, ie. the log of the duration.
*/
return;
Link_array<Grob> heads =
- Pointer_group_interface__extract_elements (me, (Grob*)0, "heads");
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "heads");
heads.sort (compare_position);
Direction dir =get_direction (me);
Grob *hed = support_head (me);
- Real w = hed->extent (hed, X_AXIS)[dir];
+ Real w = Note_head::head_extent (hed,X_AXIS)[dir];
for (int i=0; i < heads.size (); i++)
{
- heads[i]->translate_axis (w - heads[i]->extent (heads[i], X_AXIS)[dir], X_AXIS);
+ heads[i]->translate_axis (w - Note_head::head_extent (heads[i],X_AXIS)[dir],
+ X_AXIS);
}
bool parity= true; // todo: make me settable.
{
if (parity)
{
- Real l = heads[i]->extent (heads[i], X_AXIS).length ();
+ Real l = Note_head::head_extent (heads[i], X_AXIS).length ();
+
heads[i]->translate_axis (l * get_direction (me), X_AXIS);
}
parity = !parity;
// suicide ();
}
- set_spacing_hints (me);
return SCM_UNSPECIFIED;
}
-
/*
ugh.
When in a beam with tuplet brackets, brew_mol is called early,
}
-/**
- set stem directions for hinting the optical spacing correction.
-
- Modifies DIR_LIST property of the Stem's Paper_column
-
- TODO: more advanced: supply height of noteheads as well, for more advanced spacing possibilities
- */
-void
-Stem::set_spacing_hints (Grob*me)
+Molecule
+Stem::flag (Grob*me)
{
- if (!invisible_b (me))
+ /* TODO: rename flag-style into something more appropriate,
+ e.g. "stroke-style", maybe with values "" (i.e. no stroke),
+ "single" and "double". Needs more discussion.
+ */
+ String style, fstyle, staffline_offs;
+ SCM fst = me->get_grob_property ("flag-style");
+ if (gh_string_p (fst))
{
- SCM scmdir = gh_int2scm (get_direction (me));
+ fstyle = ly_scm2string (fst);
+ }
- Item* item = dynamic_cast<Item*> (me);
- Item * col = item->column_l ();
- SCM dirlist =col->get_grob_property ("dir-list");
- if (scm_sloppy_memq (scmdir, dirlist) == SCM_BOOL_F)
- {
- dirlist = gh_cons (scmdir, dirlist);
- col->set_grob_property ("dir-list", dirlist);
+ SCM st = me->get_grob_property ("style");
+ if (gh_symbol_p (st))
+ {
+ style = (ly_scm2string (scm_symbol_to_string (st)));
+ }
+ else
+ {
+ style = "";
+ }
+ bool adjust = to_boolean (me->get_grob_property ("adjust-if-on-staffline"));
+
+ if (String::compare_i (style, "mensural") == 0)
+ /* Mensural notation: For notes on staff lines, use different
+ flags than for notes between staff lines. The idea is that
+ flags are always vertically aligned with the staff lines,
+ regardless if the note head is on a staff line or between two
+ staff lines. In other words, the inner end of a flag always
+ touches a staff line.
+ */
+ {
+ if (adjust)
+ {
+ /* Urrgh! We have to detect wether this stem ends on a staff
+ line or between two staff lines. But we can not call
+ stem_end_position(me) or get_default_stem_end_position(me),
+ since this encounters the flag and hence results in an
+ infinite recursion. However, in pure mensural notation,
+ there are no multiple note heads attached to a single stem,
+ neither is there usually need for using the stem_shorten
+ property (except for 32th and 64th notes, but that is not a
+ problem since the stem length in this case is augmented by
+ an integral multiple of staff_space). Hence, it should be
+ sufficient to just take the first note head, assume it's
+ the only one, look if it's on a staff line, and select the
+ flag's shape accordingly. In the worst case, the shape
+ looks slightly misplaced, but that will usually be the
+ programmer's fault (e.g. when trying to attach multiple
+ note heads to a single stem in mensural notation). */
+ Grob *first = first_head(me);
+ int sz = Staff_symbol_referencer::line_count (me)-1;
+ int p = (int)rint (Staff_symbol_referencer::position_f (first));
+ staffline_offs = (((p ^ sz) & 0x1) == 0) ? "1" : "0";
+ }
+ else
+ {
+ staffline_offs = "2";
}
}
-}
-
-Molecule
-Stem::flag (Grob*me)
-{
- String style;
- SCM st = me->get_grob_property ("flag-style");
- if (gh_string_p (st))
+ else
{
- style = ly_scm2string (st);
+ staffline_offs = "";
}
-
char c = (get_direction (me) == UP) ? 'u' : 'd';
- Molecule m = Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) +
- to_str (flag_i (me)));
- if (!style.empty_b ())
- m.add_molecule (Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) + style));
+ String index_str
+ = String ("flags-") + style + to_str (c) + staffline_offs + to_str (flag_i (me));
+ Molecule m
+ = Font_interface::get_default_font (me)->find_by_name (index_str);
+ if (!fstyle.empty_b ())
+ m.add_molecule (Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) + fstyle));
return m;
}
Real y1 = Staff_symbol_referencer::position_f (first_head (me));
Real y2 = stem_end_position (me);
- Interval stem_y (y1,y2);
- stem_y.unite (Interval (y2,y1));
+ Interval stem_y (y1 <? y2,y2 >? y1);
+
// dy?
- Real dy = Staff_symbol_referencer::staff_space (me)/2.0;
-
+ Real dy = Staff_symbol_referencer::staff_space (me) * 0.5;
+
if (Grob *hed = support_head (me))
{
- Interval head_height = hed->extent (hed,Y_AXIS);
+ /*
+ must not take ledgers into account.
+ */
+ Interval head_height = Note_head::head_extent (hed,Y_AXIS);
Real y_attach = Note_head::stem_attachment_coordinate ( hed, Y_AXIS);
y_attach = head_height.linear_combination (y_attach);
- stem_y[Direction (-d)] += d * 2*y_attach;
+ stem_y[Direction (-d)] += d * y_attach/dy;
}
if (!invisible_b (me))
Real r=0;
if (Grob * f = first_head (me))
{
- Interval head_wid = f->extent (f,X_AXIS);
+ Interval head_wid = Note_head::head_extent(f, X_AXIS);
Real attach =
Note_head::stem_attachment_coordinate(f, X_AXIS);
Stem_info
Stem::calc_stem_info (Grob*me)
{
+ SCM scm_info = me->get_grob_property ("stem-info");
+
+ if (gh_pair_p (scm_info ))
+ {
+ 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));
+
+ return si;
+ }
+
Grob * beam = beam_l (me);
Direction beam_dir = Directional_element_interface::get (beam);
Real staff_space = Staff_symbol_referencer::staff_space (me);
Real half_space = staff_space / 2;
+
int multiplicity = Beam::get_multiplicity (beam);
-
-
- SCM space_proc = beam->get_grob_property ("space-function");
- SCM space = gh_call1 (space_proc, gh_int2scm (multiplicity));
- Real interbeam_f = gh_scm2double (space) * staff_space;
+ Real interbeam_f = Beam::get_interbeam (beam);
Real thick = gh_scm2double (beam->get_grob_property ("thickness"));
Stem_info info;
- info.idealy_f_ = chord_start_f (me);
+ info.ideal_y = chord_start_f (me);
// for simplicity, we calculate as if dir == UP
- info.idealy_f_ *= beam_dir;
+ info.ideal_y *= beam_dir;
SCM grace_prop = me->get_grob_property ("grace");
bool grace_b = to_boolean (grace_prop);
s = me->get_grob_property ("beamed-minimum-lengths");
a.clear ();
- for (SCM q = s; q != SCM_EOL; q = gh_cdr (q))
- a.push (gh_scm2double (gh_car (q)));
+ for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
+ a.push (gh_scm2double (ly_car (q)));
Real minimum_length = a[multiplicity <? (a.size () - 1)] * staff_space;
s = me->get_grob_property ("beamed-lengths");
a.clear ();
- for (SCM q = s; q != SCM_EOL; q = gh_cdr (q))
- a.push (gh_scm2double (gh_car (q)));
+ for (SCM q = s; q != SCM_EOL; q = ly_cdr (q))
+ a.push (gh_scm2double (ly_car (q)));
Real stem_length = a[multiplicity <? (a.size () - 1)] * staff_space;
{
if (multiplicity)
{
- info.idealy_f_ += thick + (multiplicity - 1) * interbeam_f;
+ info.ideal_y += thick + (multiplicity - 1) * interbeam_f;
}
- info.miny_f_ = info.idealy_f_;
- info.maxy_f_ = INT_MAX;
+ info.min_y = info.ideal_y;
+ info.max_y = 1000; // INT_MAX;
- info.idealy_f_ += stem_length;
- info.miny_f_ += minimum_length;
+ info.ideal_y += stem_length;
+ info.min_y += minimum_length;
/*
lowest beam of (UP) beam must never be lower than second staffline
staffline
lowest beam of (UP) beam must never be lower than second staffline
*/
- info.miny_f_ =
- info.miny_f_ >? 0
+ info.min_y =
+ info.min_y >? 0
>? (- 2 * half_space - thick
+ (multiplicity > 0) * thick
+ interbeam_f * (multiplicity - 1));
else
/* knee */
{
- info.idealy_f_ -= thick;
- info.maxy_f_ = info.idealy_f_;
- info.miny_f_ = -INT_MAX;
+ info.ideal_y -= thick;
+ info.max_y = info.ideal_y;
+ info.min_y = - 1000 ; // INT_MAX;
- info.idealy_f_ -= stem_length;
- info.maxy_f_ -= minimum_length;
+ info.ideal_y -= stem_length;
+ info.max_y -= minimum_length;
}
- info.idealy_f_ = (info.maxy_f_ <? info.idealy_f_) >? info.miny_f_;
+ info.ideal_y = (info.max_y <? info.ideal_y) >? info.min_y;
s = beam->get_grob_property ("shorten");
if (gh_number_p (s))
- info.idealy_f_ -= gh_scm2double (s);
+ info.ideal_y -= gh_scm2double (s);
- Grob *common = me->common_refpoint (beam, Y_AXIS);
+ Grob *common = me->common_refpoint (beam, Y_AXIS);
Real interstaff_f = beam_dir *
- (me->relative_coordinate (common, Y_AXIS)
+ (me->relative_coordinate (common, Y_AXIS)
- beam->relative_coordinate (common, Y_AXIS));
-
- info.idealy_f_ += interstaff_f;
- info.miny_f_ += interstaff_f;
- info.maxy_f_ += interstaff_f ;
-
+
+ info.ideal_y += interstaff_f;
+ info.min_y += interstaff_f;
+ info.max_y += interstaff_f ;
+
+ 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_UNDEFINED));
+
return info;
}
return m && m->has_interface (ly_symbol2scm ("stem-interface"));
}
-void
-Stem::set_interface (Grob*me)
-{
- me->set_interface (ly_symbol2scm ("stem-interface"));
-}
+ADD_INTERFACE (Stem,"stem-interface",
+ "A stem",
+ "thickness stem-info beamed-lengths beamed-minimum-lengths lengths beam stem-shorten duration-log beaming neutral-direction stem-end-position support-head heads direction length style no-stem-extend flag-style dir-forced");
+