source file of the GNU LilyPond music typesetter
- (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include "molecule.hh"
#include "debug.hh"
#include "box.hh"
-#include "bezier.hh"
+#include "bezier-bow.hh"
#include "main.hh"
#include "cross-staff.hh"
#include "group-interface.hh"
+#include "staff-symbol-referencer.hh"
-Slur::Slur ()
+class Slur_bezier_bow : public Bezier_bow
{
- set_elt_property ("note-columns", SCM_EOL);
+public:
+ Slur_bezier_bow (Array<Offset> encompass, Direction dir);
+ Array<Real> area_x_gradients_array (Real area);
+ void blow_fit ();
+ Real enclosed_area_f () const;
+ Real fit_factor () const;
+ void minimise_enclosed_area (Paper_def* paper_l, Real default_height);
+};
+
+Slur_bezier_bow::Slur_bezier_bow (Array<Offset> encompass, Direction dir)
+ : Bezier_bow (encompass, dir)
+{
+}
+
+void
+Slur_bezier_bow::blow_fit ()
+{
+ Real len = curve_.control_[3][X_AXIS];
+ Real h = curve_.control_[1][Y_AXIS] * fit_factor () / len;
+ curve_.control_[1][Y_AXIS] = h * len;
+ curve_.control_[2][Y_AXIS] = h * len;
+ curve_.assert_sanity ();
+}
+
+
+Real
+Slur_bezier_bow::enclosed_area_f () const
+{
+ Real a = 0;
+ for (int i=0; i < encompass_.size (); i++)
+ {
+ Interval x;
+ Interval y;
+ if (i == 0)
+ {
+ x = Interval (0, encompass_[1][X_AXIS] / 2);
+ y = Interval (0,
+ curve_.get_other_coordinate (X_AXIS,
+ encompass_[1][X_AXIS]
+ / 2));
+ }
+ else if (i == encompass_.size () - 1)
+ {
+ x = Interval ((encompass_[i-1][X_AXIS] + encompass_[i][X_AXIS])/2,
+ encompass_[i][X_AXIS]);
+ y = Interval (0,
+ (curve_.get_other_coordinate (X_AXIS,
+ (x[MIN] + x[MAX]) / 2)));
+ }
+ else
+ {
+ x = Interval ((encompass_[i-1][X_AXIS] + encompass_[i][X_AXIS]) / 2,
+ (encompass_[i][X_AXIS] + encompass_[i+1][X_AXIS]) / 2);
+ y = Interval (encompass_[i][Y_AXIS],
+ (curve_.get_other_coordinate (X_AXIS, x[MIN])
+ + curve_.get_other_coordinate (X_AXIS,
+ (x[MIN] + x[MAX]) / 2)
+ + curve_.get_other_coordinate (X_AXIS, x[MAX])) / 3);
+ }
+
+ Real da = x.length () * y.length ();
+ a += da;
+ }
+ return a;
+}
+
+Array<Real>
+Slur_bezier_bow::area_x_gradients_array (Real area)
+{
+ Real len = curve_.control_[3][X_AXIS];
+ Real grow = len / 10.0;
+ Array<Real> da (2);
+ for (int i=0; i < 2; i++)
+ {
+ Real r = curve_.control_[i+1][X_AXIS];
+ curve_.control_[i+1][X_AXIS] += grow;
+ da[i] = (enclosed_area_f () - area) / grow;
+ curve_.control_[i+1][X_AXIS] = r;
+ }
+ return da;
+}
+
+void
+Slur_bezier_bow::minimise_enclosed_area (Paper_def* paper_l,
+ Real default_height)
+{
+ Real length = curve_.control_[3][X_AXIS];
+ Real sb = paper_l->get_var ("slur_beautiful");
+ Real beautiful = length * default_height * sb;
+
+ DEBUG_OUT << to_str ("Beautiful: %f\n", beautiful);
+ DEBUG_OUT << to_str ("Length: %f\n", length);
+ DEBUG_OUT << to_str ("D-height: %f\n", default_height);
+ DEBUG_OUT << to_str ("FitFac: %f\n", fit_factor ());
+
+ if (fit_factor () > 1.0)
+ blow_fit ();
+
+ Real pct_c0 = paper_l->get_var ("bezier_pct_c0");
+ Real pct_c3 = paper_l->get_var ("bezier_pct_c3");
+ Real pct_in_max = paper_l->get_var ("bezier_pct_in_max");
+ Real pct_out_max = paper_l->get_var ("bezier_pct_out_max");
+ Real steps = paper_l->get_var ("bezier_area_steps");
+
+ for (int i=0; i < steps; i++)
+ {
+ Real area = enclosed_area_f ();
+ if (!i)
+ DEBUG_OUT << to_str ("Init area: %f\n", area);
+
+ if (area <= beautiful)
+ break;
+
+ Array<Real> da = area_x_gradients_array (area);
+
+ // urg
+ Real pct = pct_c0 + pct_c3 * length * length * length;
+ pct *= (steps - i) / steps;
+ if (da[0] > 0 || da[1] < 0)
+ pct = pct <? pct_out_max;
+ else
+ pct = pct <? pct_in_max;
+
+ Real u = (abs (curve_.control_[1][X_AXIS] / da[0])
+ <? abs ((curve_.control_[3][X_AXIS]
+ - curve_.control_[2][X_AXIS]) / da[1]));
+
+ DEBUG_OUT << to_str ("pct: %f\n", pct);
+ DEBUG_OUT << to_str ("u: %f\n", u);
+
+ DEBUG_OUT << to_str ("da: (%f, %f)\n", da[0], da[1]);
+ DEBUG_OUT << to_str ("da*u: (%f, %f)\n", da[0]*u*pct, da[1]*u*pct);
+ DEBUG_OUT << to_str ("cx: (%f, %f)\n", curve_.control_[1][X_AXIS],
+ curve_.control_[2][X_AXIS]);
+
+ curve_.control_[1][X_AXIS] -= da[0] * u * pct;
+ curve_.control_[2][X_AXIS] -= da[1] * u * pct;
+ }
+
+ Real area = enclosed_area_f ();
+ DEBUG_OUT << to_str ("Exarea: %f\n", area);
+}
+
+
+
+/*
+ max ( encompass.y / curve.y )
+
+ */
+Real
+Slur_bezier_bow::fit_factor () const
+{
+ Real x1 = encompass_[0][X_AXIS];
+ Real x2 = encompass_.top ()[X_AXIS];
+
+ Real factor = 0.0;
+ for (int i=1; i < encompass_.size ()-1; i++)
+ {
+ if (encompass_[i][X_AXIS] > x1 && encompass_[i][X_AXIS] < x2)
+ {
+ Real y = curve_.get_other_coordinate (X_AXIS, encompass_[i][X_AXIS]);
+ if (y>0)
+ {
+ Real f = encompass_[i][Y_AXIS] / y;
+ factor = factor >? f;
+ }
+ }
+ }
+
+
+ return factor;
+}
+
+
+
+
+
+/*
+ Slur
+*/
+
+Slur::Slur (SCM s)
+ : Spanner (s)
+{
+ // URG
+ dy_f_drul_[LEFT] = dy_f_drul_[RIGHT] = 0.0;
+ dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
+
+ set_elt_pointer ("note-columns", SCM_EOL);
+ set_elt_property ("control-points", SCM_EOL);
}
void
Slur::add_column (Note_column*n)
{
- if (!gh_pair_p (n->get_elt_property ("note-heads")))
+ if (!gh_pair_p (n->get_elt_pointer ("note-heads")))
warning (_ ("Putting slur over rest. Ignoring."));
else
{
- Group_interface gi (this, "note-columns");
- gi.add_element (n);
+ Pointer_group_interface (this, "note-columns").add_element (n);
add_dependency (n);
}
}
+void
+Slur::de_uglyfy (Slur_bezier_bow* bb, Real default_height)
+{
+ Real length = bb->curve_.control_[3][X_AXIS] ;
+ Real ff = bb->fit_factor ();
+ for (int i = 1; i < 3; i++)
+ {
+ Real ind = abs (bb->curve_.control_[(i-1)*3][X_AXIS]
+ - bb->curve_.control_[i][X_AXIS]) / length;
+ Real h = bb->curve_.control_[i][Y_AXIS] * ff / length;
+
+ Real f = default_height / length;
+ Real c1 = paper_l ()->get_var ("bezier_control1");
+ Real c2 = paper_l ()->get_var ("bezier_control2");
+ Real c3 = paper_l ()->get_var ("bezier_control3");
+ if (h > c1 * f)
+ {
+ h = c1 * f;
+ }
+ else if (h > c2 + c3 * ind)
+ {
+ h = c2 + c3 * ind;
+ }
+
+ bb->curve_.control_[i][Y_AXIS] = h * length;
+ }
+
+ bb->curve_.assert_sanity ();
+}
+
Direction
Slur::get_default_dir () const
{
Link_array<Note_column> encompass_arr =
- Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
Direction d = DOWN;
for (int i=0; i < encompass_arr.size (); i ++)
Slur::do_add_processing ()
{
Link_array<Note_column> encompass_arr =
- Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
- set_bounds (LEFT, encompass_arr[0]);
- if (encompass_arr.size () > 1)
- set_bounds (RIGHT, encompass_arr.top ());
-}
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
-void
-Slur::do_pre_processing ()
-{
- // don't set directions
+ if (encompass_arr.size ())
+ {
+ set_bound (LEFT, encompass_arr[0]);
+ if (encompass_arr.size () > 1)
+ set_bound (RIGHT, encompass_arr.top ());
+ }
}
+
Offset
Slur::encompass_offset (Note_column const* col) const
{
if (!stem_l)
{
warning (_ ("Slur over rest?"));
- o[X_AXIS] = col->hpos_f ();
+ o[X_AXIS] = col->relative_coordinate (0, X_AXIS);
o[Y_AXIS] = col->extent (Y_AXIS)[dir];
return o;
}
Direction stem_dir = directional_element (stem_l).get ();
- o[X_AXIS] = stem_l->hpos_f ();
+ o[X_AXIS] = stem_l->relative_coordinate (0, X_AXIS);
/*
Simply set x to middle of notehead
return o;
}
-/*
- ARGRARGRARGRARGAR!
+void
+Slur::after_line_breaking ()
+{
+ set_extremities ();
+ set_control_points ();
+}
- Fixme
+/*
+ urg
+ FIXME
*/
void
-Slur::do_post_processing ()
+Slur::set_extremities ()
{
Link_array<Note_column> encompass_arr =
- Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
if (!encompass_arr.size ())
{
- set_elt_property ("transparent", SCM_BOOL_T);
- set_empty (X_AXIS);
- set_empty (Y_AXIS);
+ suicide();
return;
}
if (!directional_element (this).get ())
directional_element (this).set (get_default_dir ());
+
/*
Slur and tie placement [OSU]
dx_f_drul_[d] = 0;
dy_f_drul_[d] = 0;
- if ((note_column_drul[d] == spanned_drul_[d])
+ if ((note_column_drul[d] == get_bound (d))
&& note_column_drul[d]->first_head ()
&& (note_column_drul[d]->stem_l ()))
{
&& !((my_dir == stem_l->get_direction ())
&& stem_l->beam_l () && (stem_l->beam_count (-d) >= 1)))
{
- dx_f_drul_[d] = spanned_drul_[d]->extent (X_AXIS).length () / 2;
+ dx_f_drul_[d] = get_bound (d)->extent (X_AXIS).length () / 2;
dx_f_drul_[d] -= d * x_gap_f;
if (stem_l->get_direction () != my_dir)
*/
else
{
- dx_f_drul_[d] = stem_l->hpos_f ()
- - spanned_drul_[d]->relative_coordinate (0, X_AXIS);
+ dx_f_drul_[d] = stem_l->relative_coordinate (0, X_AXIS)
+ - get_bound (d)->relative_coordinate (0, X_AXIS);
/*
side attached to beamed stem
*/
if (fix_broken_b)
{
- Direction d = (encompass_arr.top () != spanned_drul_[RIGHT]) ?
+ Direction d = (encompass_arr.top () != get_bound (RIGHT)) ?
RIGHT : LEFT;
dy_f_drul_[d] = info_drul[d][Y_AXIS];
if (!interstaff_b)
}
}
-
- /*
- Now we've got a fine slur
- Catch and correct some ugly cases
- */
- String infix = interstaff_b ? "interstaff_" : "";
- Real height_damp_f = paper_l ()->get_var ("slur_"+infix +"height_damping");
- Real slope_damp_f = paper_l ()->get_var ("slur_"+infix +"slope_damping");
- Real snap_f = paper_l ()->get_var ("slur_"+infix +"snap_to_stem");
- Real snap_max_dy_f = paper_l ()->get_var ("slur_"+infix +"snap_max_slope_change");
-
if (!fix_broken_b)
dy_f_drul_[RIGHT] += interstaff_f;
-
- Real dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
- if (!fix_broken_b)
- dy_f -= interstaff_f;
- Real dx_f = spanner_length ()+ dx_f_drul_[RIGHT] - dx_f_drul_[LEFT];
-
- /*
- Avoid too steep slurs.
- */
- Real slope_ratio_f = abs (dy_f / dx_f);
- if (slope_ratio_f > slope_damp_f)
- {
- Direction d = (Direction)(- my_dir * (sign (dy_f)));
- if (!d)
- d = LEFT;
- Real damp_f = (slope_ratio_f - slope_damp_f) * dx_f;
- /*
- must never change sign of dy
- */
- damp_f = damp_f <? abs (dy_f);
- dy_f_drul_[d] += my_dir * damp_f;
- }
-
- /*
- Avoid too high slurs
-
- Wierd slurs may look a lot better after they have been
- adjusted a bit.
- So, we'll do this in 3 steps
- */
- for (int i = 0; i < 3; i++)
- {
- Real height_f = curve_extent (Y_AXIS).length ();
- Real width_f = curve_extent (X_AXIS).length ();
-
- dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
- if (!fix_broken_b)
- dy_f -= interstaff_f;
-
- Real height_ratio_f = abs (height_f / width_f);
- if (height_ratio_f > height_damp_f)
- {
- Direction d = (Direction)(- my_dir * (sign (dy_f)));
- if (!d)
- d = LEFT;
- /* take third step */
- Real damp_f = (height_ratio_f - height_damp_f) * width_f / 3;
- /*
- if y positions at about the same height, correct both ends
- */
- if (abs (dy_f / dx_f ) < slope_damp_f)
- {
- dy_f_drul_[-d] += my_dir * damp_f;
- dy_f_drul_[d] += my_dir * damp_f;
- }
- /*
- don't change slope too much, would have been catched by slope damping
- */
- else
- {
- damp_f = damp_f <? abs (dy_f/2);
- dy_f_drul_[d] += my_dir * damp_f;
- }
- }
- }
-
- /*
- If, after correcting, we're close to stem-end...
- */
- Drul_array<Real> snapy_f_drul;
- snapy_f_drul[LEFT] = snapy_f_drul[RIGHT] = 0;
- Drul_array<Real> snapx_f_drul;
- snapx_f_drul[LEFT] = snapx_f_drul[RIGHT] = 0;
- Drul_array<bool> snapped_b_drul;
- snapped_b_drul[LEFT] = snapped_b_drul[RIGHT] = false;
- do
- {
- Note_column * nc = note_column_drul[d];
- if (nc == spanned_drul_[d]
- && nc->stem_l ()
- && nc->stem_l ()->get_direction () == my_dir
- && abs (nc->stem_l ()->extent (Y_AXIS)[my_dir]
- - dy_f_drul_[d] + (d == LEFT ? 0 : interstaff_f))
- <= snap_f)
- {
- /*
- prepare to attach to stem-end
- */
- snapx_f_drul[d] = nc->stem_l ()->hpos_f ()
- - spanned_drul_[d]->relative_coordinate (0, X_AXIS);
-
- snapy_f_drul[d] = nc->stem_l ()->extent (Y_AXIS)[my_dir]
- + interstaff_interval[d]
- + my_dir * 2 * y_gap_f;
-
- snapped_b_drul[d] = true;
- }
- }
- while (flip (&d) != LEFT);
-
- /*
- only use snapped positions if sign (dy) will not change
- and dy doesn't change too much
- */
- if (!fix_broken_b)
- dy_f += interstaff_f;
-
-
- /*
- (sigh)
-
- More refactoring could be done.
- */
- Real maxsnap = abs (dy_f * snap_max_dy_f);
- if (snapped_b_drul[LEFT] && snapped_b_drul[RIGHT]
- && ((sign (snapy_f_drul[RIGHT] - snapy_f_drul[LEFT]) == sign (dy_f)))
- && (!dy_f || (abs (snapy_f_drul[RIGHT] - snapy_f_drul[LEFT] - dy_f)
- < maxsnap)))
- {
- dy_f_drul_ = snapy_f_drul;
- dx_f_drul_ = snapx_f_drul;
- }
- else
- do
- {
- Direction od = (Direction)-d;
- if (snapped_b_drul[d]
- && d * sign (snapy_f_drul[d] - dy_f_drul_[od]) == sign (dy_f)
- && (!dy_f || (abs (snapy_f_drul[d] - dy_f_drul_[od] - d * dy_f)
- < maxsnap)))
- {
- dy_f_drul_[d] = snapy_f_drul[d];
- dx_f_drul_[d] = snapx_f_drul[d];
- }
- }
- while (flip (&d) != LEFT);
}
Slur::cross_staff_count ()const
{
Link_array<Note_column> encompass_arr =
- Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
int k=0;
Slur::get_encompass_offset_arr () const
{
Link_array<Note_column> encompass_arr =
- Group_interface__extract_elements (this, (Note_column*)0, "note-columns");
+ Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
Array<Offset> offset_arr;
+
#if 0
/*
check non-disturbed slur
int cross_count = cross_staff_count ();
bool cross_b = cross_count && cross_count < encompass_arr.size ();
- if (encompass_arr[0] != spanned_drul_[LEFT])
+ if (encompass_arr[0] != get_bound (LEFT))
{
first--;
Real is = calc_interstaff_dist (encompass_arr[0], this);
/*
right is broken edge
*/
- if (encompass_arr.top () != spanned_drul_[RIGHT])
+ if (encompass_arr.top () != get_bound (RIGHT))
{
last++;
}
{
Array<Rod> a;
Rod r;
- r.item_l_drul_ = spanned_drul_;
+
+ r.item_l_drul_[LEFT] = get_bound (LEFT);
+ r.item_l_drul_[RIGHT] = get_bound (RIGHT);
r.distance_f_ = paper_l ()->get_var ("slur_x_minimum");
a.push (r);
}
+
+MAKE_SCHEME_SCORE_ELEMENT_CALLBACKS(Slur);
+
+/*
+ Ugh should have dash-length + dash-period
+ */
+Molecule
+Slur::do_brew_molecule () const
+{
+ Real thick = paper_l ()->get_var ("slur_thickness");
+ Bezier one = get_curve ();
+
+ Molecule a;
+ SCM d = get_elt_property ("dashed");
+ if (gh_number_p (d))
+ a = lookup_l ()->dashed_slur (one, thick, thick * gh_scm2double (d));
+ else
+ a = lookup_l ()->slur (one, directional_element (this).get () * thick, thick);
+
+ return a;
+}
+
+void
+Slur::set_control_points ()
+{
+ Slur_bezier_bow bb (get_encompass_offset_arr (),
+ directional_element (this).get ());
+
+ Real staff_space = Staff_symbol_referencer_interface (this).staff_space ();
+ Real h_inf = paper_l ()->get_var ("slur_height_limit_factor") * staff_space;
+ Real r_0 = paper_l ()->get_var ("slur_ratio");
+
+ bb.set_default_bezier (h_inf, r_0);
+
+ if (bb.fit_factor () > 1.0)
+ {
+ Real length = bb.curve_.control_[3][X_AXIS];
+ Real default_height = bb.get_default_height (h_inf, r_0, length);
+ bb.minimise_enclosed_area (paper_l(), default_height);
+
+ Real bff = paper_l ()->get_var ("slur_force_blowfit");
+ bb.curve_.control_[1][Y_AXIS] *= bff;
+ bb.curve_.control_[2][Y_AXIS] *= bff;
+ bb.blow_fit ();
+
+ Real sb = paper_l ()->get_var ("slur_beautiful");
+ Real beautiful = length * default_height * sb;
+ Real area = bb.enclosed_area_f ();
+
+ /*
+ Slurs that fit beautifully are not ugly
+ */
+ if (area > beautiful)
+ de_uglyfy (&bb, default_height);
+ }
+
+ Bezier b = bb.get_bezier ();
+
+
+ SCM controls = SCM_EOL;
+ for (int i= 4; i--;)
+ controls = gh_cons ( ly_offset2scm (b.control_[i]), controls);
+
+ set_elt_property ("control-points", controls);
+}
+
+
+Bezier
+Slur::get_curve () const
+{
+ Bezier b;
+ int i = 0;
+
+ if (!directional_element (this).get ())
+ ((Slur*)this)->set_extremities ();
+
+ if (!gh_pair_p (get_elt_property ("control-points")))
+ ((Slur*)this)->set_control_points ();
+
+
+ for (SCM s= get_elt_property ("control-points"); s != SCM_EOL; s = gh_cdr (s))
+ {
+ b.control_[i] = ly_scm2offset (gh_car (s));
+ i++;
+ }
+
+ Array<Offset> enc (get_encompass_offset_arr ());
+ Direction dir = directional_element (this).get ();
+
+ Real x1 = enc[0][X_AXIS];
+ Real x2 = enc.top ()[X_AXIS];
+
+ Real off = 0.0;
+ for (int i=1; i < enc.size ()-1; i++)
+ {
+ Real x = enc[i][X_AXIS];
+ if (x > x1 && x <x2)
+ {
+ Real y = b.get_other_coordinate (X_AXIS, x);
+ off = off >? dir * (enc[i][Y_AXIS] - y);
+ }
+ }
+ b.translate (Offset (0, dir * off));
+ return b;
+}
+
projects / lilypond.git / blobdiff