X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fline-interface.cc;h=c662d77d9f84f42b97e62d71f2c17b7320f113fc;hb=6a33b5cb60d40f9ae549deac8d0e6ebebf17af60;hp=894d1089cfa6a545cad8835a7ca96c88b0a49b16;hpb=16cb456cabf477f6d398ff731aa0f10b60913394;p=lilypond.git diff --git a/lily/line-interface.cc b/lily/line-interface.cc index 894d1089cf..c662d77d9f 100644 --- a/lily/line-interface.cc +++ b/lily/line-interface.cc @@ -12,6 +12,7 @@ #include "lookup.hh" #include "output-def.hh" #include "grob.hh" +#include "font-interface.hh" Stencil Line_interface::make_arrow (Offset begin, Offset end, @@ -31,13 +32,102 @@ Line_interface::make_arrow (Offset begin, Offset end, return Lookup::round_filled_polygon (points, thick); } +Stencil +Line_interface::make_trill_line (Grob *me, + Offset from, + Offset to) +{ + Offset dz = (to-from); + SCM alist_chain = Font_interface::text_font_alist_chain (me); + SCM style_alist = scm_list_n (scm_cons (ly_symbol2scm ("font-encoding"), + ly_symbol2scm ("fetaMusic")), + SCM_UNDEFINED); + + Font_metric *fm = select_font (me->layout (), + scm_cons (style_alist, + alist_chain)); + + Stencil elt = fm->find_by_name ("scripts.trill_element"); + elt.align_to (Y_AXIS, CENTER); + Real elt_len = elt.extent (X_AXIS).length (); + if (elt_len <= 0.0) + { + programming_error ("can't find scripts.trill_element"); + return Stencil (); + } + + Stencil line; + Real len = 0.0; + do + { + line.add_at_edge (X_AXIS, RIGHT, elt, 0); + len = line.extent (X_AXIS).length (); + } + while (len + elt_len < dz.length ()); + + line.rotate (dz.arg (), Offset (LEFT, CENTER)); + line.translate (from); + + return line; +} + + +Stencil +Line_interface::make_zigzag_line (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) { dash_fraction = min (max (dash_fraction, 0.0), 1.0); Real on = dash_fraction * dash_period + thick; - Real off = dash_period - on; + Real off = max (0.0, dash_period - on); SCM at = scm_list_n (ly_symbol2scm ("dashed-line"), scm_from_double (thick), @@ -113,46 +203,68 @@ Line_interface::line (Grob *me, Offset from, Offset to) * robust_scm2double (me->get_property ("thickness"), 1); SCM type = me->get_property ("style"); + if (type == ly_symbol2scm ("zigzag")) + { + return make_zigzag_line (me, from, to); + } + else if (type == ly_symbol2scm ("trill")) + return make_trill_line (me, from, to); + + Stencil stencil; - Stencil stil; - - SCM dash_fraction = me->get_property ("dash-fraction"); - if (scm_is_number (dash_fraction) || type == ly_symbol2scm ("dotted-line")) + if (type == ly_symbol2scm ("dashed-line") || type == ly_symbol2scm ("dotted-line")) { Real fraction = type == ly_symbol2scm ("dotted-line") ? 0.0 - : robust_scm2double (dash_fraction, 0.4); + : robust_scm2double (me->get_property ("dash-fraction"), 0.4); fraction = min (max (fraction, 0.0), 1.0); Real period = Staff_symbol_referencer::staff_space (me) * robust_scm2double (me->get_property ("dash-period"), 1.0); - if (period < 0) + if (period <= 0) return Stencil (); - stil = make_dashed_line (thick, from, to, period, fraction); + Real len = (to-from).length (); + + int n = (int) rint ((len - period * fraction) / period); + n = max (0, n); + if (n > 0) + { + /* + TODO: figure out something intelligent for really short + sections. + */ + period = ((to-from).length () - period * fraction) / n; + } + stencil = make_dashed_line (thick, from, to, period, fraction); } else - stil = make_line (thick, from, to); + stencil = make_line (thick, from, to); - return stil; + return stencil; } ADD_INTERFACE (Line_interface, - "Generic line objects. Any object using lines supports this. Normally, " - "you get a straight line. If @code{dash-period} is defined, a dashed line is " - "produced; the length of the dashes is tuned with " - "@code{dash-fraction}. If the latter is set to 0, a dotted line is " - "produced. If @code{dash-fraction} is negative, the line is made " - "transparent.", + "Generic line objects. Any object using lines supports this." + " The property @code{style} can be @code{line}," + " @code{dashed-line}, @code{trill}, @code{dotted-line} or" + " @code{zigzag}.\n" + "\n" + "For @code{dashed-line}, the length of the dashes is tuned" + " with @code{dash-fraction}. If the latter is set to@tie{}0, a" + " dotted line is produced. If @code{dash-period} is negative," + " the line is made transparent.", /* properties */ "dash-period " "dash-fraction " "thickness " "style " + "zigzag-length " + "zigzag-width " "arrow-length " "arrow-width ")