--- /dev/null
+/*
+ slur-bezier-bow.cc -- implement Slur_bezier_bow
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+#include "debug.hh"
+#include "paper-def.hh"
+#include "slur-bezier-bow.hh"
+#include "main.hh"
+
+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;
+}
+
+
+
+
#include "paper-column.hh"
#include "molecule.hh"
#include "debug.hh"
-#include "box.hh"
-#include "bezier-bow.hh"
+#include "slur-bezier-bow.hh"
#include "main.hh"
#include "cross-staff.hh"
#include "group-interface.hh"
#include "staff-symbol-referencer.hh"
-class Slur_bezier_bow : public Bezier_bow
-{
-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;
-
+ /*
+ silly value for testing
+ */
+ set_elt_property ("attachment", gh_cons (ly_symbol2scm ("alongside-stem"),
+ ly_symbol2scm ("alongside-stem")));
set_elt_pointer ("note-columns", SCM_EOL);
set_elt_property ("control-points", SCM_EOL);
}
return SCM_UNDEFINED;
}
-/*
- urg
- FIXME
- */
-void
-Slur::set_extremities ()
+SCM
+slur_get_bound (SCM slur, SCM dir)
{
- Link_array<Note_column> encompass_arr =
- Pointer_group_interface__extract_elements (this, (Note_column*)0, "note-columns");
-
- if (!encompass_arr.size ())
- {
- suicide();
- return;
- }
-
- if (!directional_element (this).get ())
- directional_element (this).set (get_default_dir ());
-
-
- /*
- Slur and tie placement [OSU]
-
- Slurs:
- * x = centre of head - d * x_gap_f
+ return ((Slur*)unsmob_element (slur))->get_bound (to_dir (dir))->self_scm_;
+}
- TODO:
- * y = length < 5ss : horizontal tangent + d * 0.25 ss
- y = length >= 5ss : y next interline - d * 0.25 ss
- */
+SCM
+score_element_get_pointer (SCM se, SCM name)
+{
+ SCM s = scm_assq (name, unsmob_element (se)->pointer_alist_);
+ return (s == SCM_BOOL_F) ? SCM_UNDEFINED : gh_cdr (s);
+}
- Real staff_space = paper_l ()->get_var ("interline");
- Real half_staff_space = staff_space / 2;
+SCM
+score_element_get_property (SCM se, SCM name)
+{
+ SCM s = scm_assq (name, unsmob_element (se)->property_alist_);
+ return (s == SCM_BOOL_F) ? SCM_UNDEFINED : gh_cdr (s);
+}
- Real x_gap_f = paper_l ()->get_var ("slur_x_gap");
- Real y_gap_f = paper_l ()->get_var ("slur_y_gap");
+void
+init_score_elts ()
+{
+ scm_make_gsubr ("get-pointer", 2 , 0, 0,
+ (SCM(*)(...)) score_element_get_pointer);
+ scm_make_gsubr ("get-property", 2 , 0, 0,
+ (SCM(*)(...)) score_element_get_property);
+ scm_make_gsubr ("get-bound", 2 , 0, 0,
+ (SCM(*)(...)) slur_get_bound);
+}
- Drul_array<Note_column*> note_column_drul;
- note_column_drul[LEFT] = encompass_arr[0];
- note_column_drul[RIGHT] = encompass_arr.top ();
+ADD_SCM_INIT_FUNC (score_elt, init_score_elts);
- bool fix_broken_b = false;
+void
+Slur::set_extremities ()
+{
+ if (!directional_element (this).get ())
+ directional_element (this).set (get_default_dir ());
- Direction my_dir = directional_element (this).get ();
-
- Direction d = LEFT;
+ Direction dir = LEFT;
do
{
- dx_f_drul_[d] = 0;
- dy_f_drul_[d] = 0;
-
- if ((note_column_drul[d] == get_bound (d))
- && note_column_drul[d]->first_head ()
- && (note_column_drul[d]->stem_l ()))
+ // for (SCM s = get_elt_property ("slur-extremity-rules"); s != SCM_EOL; s = gh_cdr (s))
+ for (SCM s = scm_eval (ly_symbol2scm ("slur-extremity-rules"));
+ s != SCM_EOL; s = gh_cdr (s))
{
- Stem* stem_l = note_column_drul[d]->stem_l ();
- /*
- side directly attached to note head;
- no beam getting in the way
- */
- if ((stem_l->extent (Y_AXIS).empty_b ()
- || !((stem_l->get_direction () == my_dir) && (my_dir != d)))
- && !((my_dir == stem_l->get_direction ())
- && stem_l->beam_l () && (stem_l->beam_count (-d) >= 1)))
+ SCM r = scm_eval (scm_listify (gh_caar (s),
+ this->self_scm_,
+ gh_int2scm ((int)dir),
+ SCM_UNDEFINED));
+ if (r != SCM_BOOL_F)
{
- dx_f_drul_[d] = get_bound (d)->extent (X_AXIS).length () / 2;
- dx_f_drul_[d] -= d * x_gap_f;
+ index_set_cell (get_elt_property ("attachment"), dir,
+ gh_cdar (s));
+ break;
+ }
+ }
+ }
+ while (flip (&dir) != LEFT);
+}
- if (stem_l->get_direction () != my_dir)
- {
- dy_f_drul_[d] = note_column_drul[d]->extent (Y_AXIS)[my_dir];
- }
- else
- {
- dy_f_drul_[d] = stem_l->chord_start_f ()
- + my_dir * half_staff_space;
- }
- dy_f_drul_[d] += my_dir * y_gap_f;
+Offset
+Slur::get_attachment (Direction dir) const
+{
+ SCM s = get_elt_property ("attachment");
+ SCM a = dir == LEFT ? gh_car (s) : gh_cdr (s);
+ Real ss = Staff_symbol_referencer_interface (this).staff_space ();
+ Real hs = ss / 2.0;
+ Offset o;
+ if (Note_column* n = dynamic_cast<Note_column*> (get_bound (dir)))
+ {
+ if (Stem* st = dynamic_cast<Stem*> (n->stem_l ()))
+ {
+ String str = ly_symbol2string (a);
+ if (str == "head")
+ {
+ o = Offset (0, st->chord_start_f ());
}
- /*
- side attached to (visible) stem
- */
- else
+ else if (str == "alongside-stem")
{
- 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 (stem_l->beam_l () && (stem_l->beam_count (-d) >= 1))
- {
- dy_f_drul_[d] = stem_l->extent (Y_AXIS)[my_dir];
- dy_f_drul_[d] += my_dir * 2 * y_gap_f;
- }
- /*
- side attached to notehead, with stem getting in the way
- */
- else
+ o = Offset (0, st->chord_start_f ());
+ }
+ else if (str == "stem")
+ {
+ o = Offset (0, st->stem_end_position () * hs);
+ }
+ else if (str == "loose-end")
+ {
+ SCM other_a = dir == LEFT ? gh_cdr (s) : gh_car (s);
+ if (ly_symbol2string (other_a) != "loose-end")
{
- dx_f_drul_[d] -= d * x_gap_f;
-
- dy_f_drul_[d] = stem_l->chord_start_f ()
- + my_dir * half_staff_space;
- dy_f_drul_[d] += my_dir * y_gap_f;
+ o = Offset (0, get_attachment (-dir)[Y_AXIS]);
}
}
- }
- /*
- loose end
- */
- else
- {
- dx_f_drul_[d] = get_broken_left_end_align ();
-
- /*
- broken: should get y from other piece, so that slur
- continues up/down trend
-
- for now: be horizontal..
- */
- fix_broken_b = true;
- }
- }
- while (flip (&d) != LEFT);
-
- int cross_count = cross_staff_count ();
- bool interstaff_b = (0 < cross_count) && (cross_count < encompass_arr.size ());
- Drul_array<Offset> info_drul;
- Drul_array<Real> interstaff_interval;
-
- do
- {
- info_drul[d] = encompass_offset (encompass_arr.boundary (d, 0));
- interstaff_interval[d] = - calc_interstaff_dist (encompass_arr.boundary (d,0),
- this);
- }
- while (flip (&d) != LEFT);
-
- Real interstaff_f = interstaff_interval[RIGHT] - interstaff_interval[LEFT];
-
- if (fix_broken_b)
- {
- Direction d = (encompass_arr.top () != get_bound (RIGHT)) ?
- RIGHT : LEFT;
- dy_f_drul_[d] = info_drul[d][Y_AXIS];
- if (!interstaff_b)
- {
- dy_f_drul_[d] -= interstaff_interval[d];
- if (cross_count) // interstaff_i ?
+ o += Offset (0.5 * st->get_direction ()
+ * n->extent (X_AXIS).length (), 0);
+
+ SCM l = scm_assoc
+ (scm_listify (a,
+ gh_int2scm (st->get_direction () * dir),
+ gh_int2scm (directional_element (this).get () * dir),
+ SCM_UNDEFINED),
+ scm_eval (ly_symbol2scm ("slur-extremity-offset-alist")));
+
+ if (l != SCM_BOOL_F)
{
- dy_f_drul_[LEFT] += interstaff_interval[d];
- dy_f_drul_[RIGHT] += interstaff_interval[d];
+ o += ly_scm2offset (gh_cdr (l)) * ss * dir;
}
}
}
-
- if (!fix_broken_b)
- dy_f_drul_[RIGHT] += interstaff_f;
+
+ return o;
}
-
int
Slur::cross_staff_count ()const
{
Array<Offset> offset_arr;
-#if 0
- /*
- check non-disturbed slur
- FIXME: x of ends off by a tiny bit!!
- */
- offset_arr.push (Offset (0, dy_f_drul_[LEFT]));
- offset_arr.push (Offset (0, dy_f_drul_[RIGHT]));
- return offset_arr;
-#endif
-
Offset origin (relative_coordinate (0, X_AXIS), 0);
int first = 1;
int last = encompass_arr.size () - 2;
- offset_arr.push (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
+ offset_arr.push (get_attachment (LEFT));
/*
left is broken edge
*/
-
int cross_count = cross_staff_count ();
bool cross_b = cross_count && cross_count < encompass_arr.size ();
if (encompass_arr[0] != get_bound (LEFT))
offset_arr.push (o - origin);
}
- offset_arr.push (Offset (spanner_length ()+ dx_f_drul_[RIGHT],
- dy_f_drul_[RIGHT]));
+ offset_arr.push (Offset (spanner_length (), 0) + get_attachment (RIGHT));
return offset_arr;
}
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