source file of the GNU LilyPond music typesetter
- (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2004--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "line-interface.hh"
return Lookup::round_filled_polygon (points, thick);
}
+Stencil
+Line_interface::zigzag_stencil (Grob *me,
+ Offset from,
+ Offset to)
+{
+ Offset dz = to -from;
+
+ Real thick = Staff_symbol_referencer::line_thickness (me);
+ thick *= robust_scm2double (me->get_property ("thickness"), 1.0); // todo: staff sym referencer?
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+
+ Real w = robust_scm2double (me->get_property ("zigzag-width"), 1) * staff_space;
+ int count = (int) ceil (dz.length () / w);
+ w = dz.length () / count;
+
+ Real l = robust_scm2double (me->get_property ("zigzag-length"), 1) * w;
+ Real h = l > w / 2 ? sqrt (l * l - w * w / 4) : 0;
+
+ Offset rotation_factor = complex_exp (Offset (0, dz.arg ()));
+
+ Offset points[3];
+ points[0] = Offset (0, -h / 2);
+ points[1] = Offset (w / 2, h / 2);
+ points[2] = Offset (w, -h / 2);
+ for (int i = 0; i < 3; i++)
+ points[i] = complex_multiply (points[i], rotation_factor);
+
+ Stencil squiggle (Line_interface::make_line (thick, points[0], points[1]));
+ squiggle.add_stencil (Line_interface::make_line (thick, points[1], points[2]));
+
+ Stencil total;
+ for (int i = 0; i < count; i++)
+ {
+ Stencil moved_squiggle (squiggle);
+ moved_squiggle.translate (from + Offset (i * w, 0) * rotation_factor);
+ total.add_stencil (moved_squiggle);
+ }
+
+ Box b;
+ b.add_point (Offset (0, 0));
+ b.add_point (dz);
+ b[X_AXIS].widen (thick / 2);
+ b[Y_AXIS].widen (thick / 2);
+
+ return Stencil (b, total.expr ());
+}
+
+
Stencil
Line_interface::make_dashed_line (Real thick, Offset from, Offset to,
Real dash_period, Real dash_fraction)
* robust_scm2double (me->get_property ("thickness"), 1);
SCM type = me->get_property ("style");
-
+ if (type == ly_symbol2scm ("zigzag"))
+ {
+ return zigzag_stencil (me, from, to);
+ }
Stencil stil;
SCM dash_fraction = me->get_property ("dash-fraction");
"dash-fraction "
"thickness "
"style "
+ "zigzag-length "
+ "zigzag-width "
"arrow-length "
- "arrow-width")
-
+ "arrow-width ")
-
-/* todo: move this somewhere else? */
-Stencil
-points_to_line_stencil (vector<Offset> points)
-{
- Stencil ret;
- for (vsize i = 1; i < points.size (); i++)
- {
- if (points[i-1].is_sane () && points[i].is_sane ())
- {
- Stencil line
- = Line_interface::make_line (0.1, points[i-1], points[i]);
- ret.add_stencil (line);
- }
- }
- return ret;
-}