source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
*/
+
+#include <math.h> // tanh.
+
+#include "directional-element-interface.hh"
#include "beaming.hh"
#include "dimensions.hh"
#include "beam.hh"
#include "misc.hh"
#include "debug.hh"
-#include "leastsquares.hh"
+#include "least-squares.hh"
#include "stem.hh"
#include "paper-def.hh"
#include "lookup.hh"
if (visible_stem_count () < 2)
{
warning (_ ("beam has less than two stems"));
- set_elt_property ("transparent", SCM_BOOL_T);
+ // set_elt_property ("transparent", SCM_BOOL_T);
}
- if (!get_direction ())
- set_direction (get_default_dir ());
+ if (!directional_element (this).get ())
+ directional_element (this).set (get_default_dir ());
auto_knees ();
set_stem_directions ();
-
set_stem_shorten ();
}
for (int i=0; i <stem_count (); i++)
do { // HUH -- waar slaat dit op?
Stem *s = stem (i);
- int current = s->get_direction ()
- ? (1 + d * s->get_direction ())/2
+ Direction sd = directional_element (s).get ();
+ int current = sd ? (1 + d * sd)/2
: s->get_center_distance ((Direction)-d);
if (current)
void
Beam::set_stem_directions ()
{
- Direction d = get_direction ();
+ Direction d = directional_element (this).get ();
for (int i=0; i <stem_count (); i++)
{
Stem *s = stem (i);
SCM force = s->remove_elt_property ("dir-forced");
if (!gh_boolean_p (force) || !gh_scm2bool (force))
- s->set_direction (d);
+ directional_element (s).set (d);
}
}
bool knee_b = false;
int knee_y = 0;
SCM gap = get_elt_property (gap_str);
+ Direction d = directional_element (this).get ();
+
if (gh_number_p (gap))
{
int auto_gap_i = gh_scm2int (gap);
{
bool is_b = (bool)(calc_interstaff_dist (stem (i), this)
- calc_interstaff_dist (stem (i-1), this));
- int l_y = (int)(stem (i-1)->head_positions()[get_direction ()])
+ int l_y = (int)(stem (i-1)->head_positions()[d])
+ (int)calc_interstaff_dist (stem (i-1), this);
- int r_y = (int)(stem (i)->head_positions()[get_direction ()])
+ int r_y = (int)(stem (i)->head_positions()[d])
+ (int)calc_interstaff_dist (stem (i), this);
int gap_i = r_y - l_y;
{
for (int i=0; i < stem_count (); i++)
{
- int y = (int)(stem (i)->head_positions()[get_direction ()])
+ int y = (int)(stem (i)->head_positions()[d])
+ (int)calc_interstaff_dist (stem (i), this);
- stem (i)->set_direction (y < knee_y ? UP : DOWN);
+ directional_element (stem (i)).set (y < knee_y ? UP : DOWN);
stem (i)->set_elt_property ("dir-forced", SCM_BOOL_T);
}
}
/* first, calculate y, dy */
Real y, dy;
calc_position_and_height (&y, &dy);
- if (suspect_slope_b (y, dy))
- dy = 0;
+ if (visible_stem_count ())
+ {
+ if (suspect_slope_b (y, dy))
+ dy = 0;
- Real damped_dy = calc_slope_damping_f (dy);
- Real quantised_dy = quantise_dy_f (damped_dy);
+ Real damped_dy = calc_slope_damping_f (dy);
+ Real quantised_dy = quantise_dy_f (damped_dy);
- y += (dy - quantised_dy) / 2;
- dy = quantised_dy;
-
+ y += (dy - quantised_dy) / 2;
+ dy = quantised_dy;
+ }
/*
until here, we used only stem_info, which acts as if dir=up
*/
- y *= get_direction ();
- dy *= get_direction ();
+ y *= directional_element (this).get ();
+ dy *= directional_element (this).get ();
+
+ Staff_symbol_referencer_interface st (this);
+ Real half_space = st.staff_space () / 2;
- /* set or read dy as necessary */
- SCM s = get_elt_property ("height");
+ /* check for user-override of dy */
+ SCM s = remove_elt_property ("height-hs");
if (gh_number_p (s))
- dy = gh_scm2double (s);
- else
- set_elt_property ("height", gh_double2scm (dy));
+ {
+ dy = gh_scm2double (s) * half_space;
+ }
+ set_elt_property ("height", gh_double2scm (dy));
- /* set or read y as necessary */
- s = get_elt_property ("y-position");
+ /* check for user-override of y */
+ s = remove_elt_property ("y-position-hs");
if (gh_number_p (s))
{
- y = gh_scm2double (s);
- set_stem_length (y, dy);
+ y = gh_scm2double (s) * half_space;
}
else
{
set_stem_length (y, dy);
y_shift = check_stem_length_f (y, dy);
- Staff_symbol_referencer_interface st (this);
- Real half_space = st.staff_space () / 2;
if (y_shift > half_space / 4)
{
y += y_shift;
*/
int quant_dir = 0;
if (abs (y_shift) > half_space / 2)
- quant_dir = sign (y_shift) * get_direction ();
+ quant_dir = sign (y_shift) * directional_element (this).get ();
y = quantise_y_f (y, dy, quant_dir);
- set_stem_length (y, dy);
}
-
- set_elt_property ("y-position", gh_double2scm (y));
}
+ // UGH. Y is not in staff position unit?
+ // Ik dacht datwe daar juist van weg wilden?
+ set_stem_length (y, dy);
+ set_elt_property ("y-position", gh_double2scm (y));
}
/*
return;
}
- Least_squares ls;
+ Array<Offset> ideals;
Real x0 = first_visible_stem ()->hpos_f ();
for (int i=0; i < stem_count (); i++)
{
Stem* s = stem (i);
if (s->invisible_b ())
continue;
- ls.input.push (Offset (s->hpos_f () - x0,
- s->calc_stem_info ().idealy_f_));
+ ideals.push (Offset (s->hpos_f () - x0,
+ s->calc_stem_info ().idealy_f_));
}
Real dydx;
- ls.minimise (dydx, *y); // duh, takes references
+ minimise_least_squares (&dydx, y, ideals); // duh, takes references
Real dx = last_visible_stem ()->hpos_f () - x0;
*dy = dydx * dx;
bool
Beam::suspect_slope_b (Real y, Real dy) const
{
+ /* first, calculate y, dy */
/*
steep slope running against lengthened stem is suspect
*/
Real steep = paper_l ()->get_var ("beam_steep_slope");
Real dx = last_visible_stem ()->hpos_f () - first_visible_stem ()->hpos_f ();
- Real dydx = dy/dx;
+ Real dydx = dy && dx ? dy/dx : 0;
if (((y - first_ideal > lengthened) && (dydx > steep))
|| ((y + dy - last_ideal > lengthened) && (dydx < -steep)))
{
Real dx = last_visible_stem ()->hpos_f ()
- first_visible_stem ()->hpos_f ();
- Real dydx = dy/dx;
+ Real dydx = dy && dx ? dy/dx : 0;
dydx = 0.6 * tanh (dydx) / damping;
return dydx * dx;
}
Real interbeam_f = paper_l ()->interbeam_f (beam_multiplicity);
Real x0 = first_visible_stem ()->hpos_f ();
Real dx = last_visible_stem ()->hpos_f () - x0;
- Real stem_y = (s->hpos_f () - x0) / dx * dy + y;
+ Real stem_y = (dy && dx ? (s->hpos_f () - x0) / dx * dy : 0) + y;
/* knee */
- if (get_direction () != s->get_direction ())
- {
- stem_y -= get_direction ()
+ Direction dir = directional_element(this).get ();
+ Direction sdir = directional_element (s).get ();
+
+ /* knee */
+ if (dir!= sdir)
+ {
+ stem_y -= dir
* (thick / 2 + (beam_multiplicity - 1) * interbeam_f);
Staff_symbol_referencer_interface me (s);
// huh, why not for first visible?
if (//(s != first_visible_stem ()) &&
me.staff_symbol_l () != last.staff_symbol_l ())
- stem_y += get_direction ()
+ stem_y += directional_element (this).get ()
* (beam_multiplicity - stem_multiplicity) * interbeam_f;
}
return stem_y;
{
Real shorten = 0;
Real lengthen = 0;
+ Direction dir = directional_element (this).get ();
+
for (int i=0; i < stem_count (); i++)
{
Stem* s = stem (i);
Real stem_y = calc_stem_y_f (s, y, dy);
- stem_y *= get_direction ();
+ stem_y *= dir;
Stem_info info = s->calc_stem_info ();
- if (stem_y > info.maxy_f_)
- shorten = shorten <? info.maxy_f_ - stem_y;
-
- if (stem_y < info.miny_f_)
- lengthen = lengthen >? info.miny_f_ - stem_y;
+ // 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)
warning (_ ("weird beam vertical offset"));
/* when all stems are too short, normal stems win */
- if (shorten)
- return shorten * get_direction ();
- else
- return lengthen * get_direction ();
+ return dir * ((shorten) ? shorten : lengthen);
}
/*
if (a.size () <= 1)
return y;
- Real up_y = get_direction () * y;
+ Real up_y = directional_element (this).get () * y;
Interval iv = quantise_iv (a, up_y/staff_space) * staff_space;
Real q = up_y - iv[SMALLER] <= iv[BIGGER] - up_y
if (quant_dir)
q = iv[(Direction)quant_dir];
- return q * get_direction ();
+ return q * directional_element (this).get ();
}
void
Real interbeam_f = paper_l ()->interbeam_f (multiplicity);
Real thick = gh_scm2double (get_elt_property ("beam-thickness"));;
- Real dy = interbeam_f;
+ Real bdy = interbeam_f;
Real stemdx = staffline_f;
- Real dx = last_visible_stem ()->hpos_f () - first_visible_stem ()->hpos_f ();
- Real dydx = get_real ("height")/dx;
+ Real dx = visible_stem_count () ?
+ last_visible_stem ()->hpos_f () - first_visible_stem ()->hpos_f ()
+ : 0.0;
+ Real dy = get_real ("height");
+ Real dydx = dy && dx ? dy/dx : 0;
Molecule leftbeams;
Molecule rightbeams;
else
nw_f = paper_l ()->get_var ("quartwidth");
+
+ Direction dir = directional_element (this).get ();
+
/* half beams extending to the left. */
if (prev)
{
for (int j = 0; j < lhalfs; j++)
{
Molecule b (a);
- b.translate_axis (-get_direction () * dy * (lwholebeams+j), Y_AXIS);
+ b.translate_axis (-dir * bdy * (lwholebeams+j), Y_AXIS);
leftbeams.add_molecule (b);
}
}
for (; j < nogap; j++)
{
Molecule b (a);
- b.translate_axis (-get_direction () * dy * j, Y_AXIS);
+ b.translate_axis (-dir * bdy * j, Y_AXIS);
rightbeams.add_molecule (b);
}
// TODO: notehead widths differ for different types
for (; j < rwholebeams; j++)
{
Molecule b (a);
- if (!here->invisible_b ())
- b.translate (Offset (gap_f, -get_direction () * dy * j));
- else
- b.translate (Offset (0, -get_direction () * dy * j));
+ b.translate (Offset (here->invisible_b () ? 0 : gap_f, -dir * bdy * j));
rightbeams.add_molecule (b);
}
for (; j < rwholebeams + rhalfs; j++)
{
Molecule b (a);
- b.translate_axis (-get_direction () * dy * j, Y_AXIS);
+ b.translate_axis (- dir * bdy * j, Y_AXIS);
rightbeams.add_molecule (b);
}
Molecule *mol_p = new Molecule;
if (!stem_count ())
return mol_p;
+ Real x0,dx;
+ if (visible_stem_count ())
+ {
+ x0 = first_visible_stem ()->hpos_f ();
+ dx = last_visible_stem ()->hpos_f () - x0;
+ }
+ else
+ {
+ x0 = stem (0)->hpos_f ();
+ dx = stem_top ()->hpos_f () - x0;
+ }
- Real x0 = first_visible_stem ()->hpos_f ();
- Real dx = last_visible_stem ()->hpos_f () - x0;
- Real dydx = get_real ("height")/dx;
+
+ Real dy = get_real ("height");
+ Real dydx = dy && dx ? dy/dx : 0;
Real y = get_real ("y-position");
for (int j=0; j <stem_count (); j++)
{
if (!s->invisible_b ())
return s;
}
-
- assert (0);
-
return 0;
}
if (!s->invisible_b ())
return s;
}
-
- assert (0);
- // sigh
return 0;
}
projects / lilypond.git / blobdiff