X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fline-interface.cc;h=bc6099916ad8ef82af07fb166b50ecd1972641c3;hb=ed7fc0c2cac9da5d3d6e497588015d325897fa8d;hp=cc8c17b851e5dc39bcb6f136494f2557562b1be5;hpb=e37010af17faa8b185de836664b6544bd29dc1d0;p=lilypond.git diff --git a/lily/line-interface.cc b/lily/line-interface.cc index cc8c17b851..bc6099916a 100644 --- a/lily/line-interface.cc +++ b/lily/line-interface.cc @@ -1,42 +1,146 @@ -/* -line-interface.cc -- implement Line_interface +/* + This file is part of LilyPond, the GNU music typesetter. -source file of the GNU LilyPond music typesetter + Copyright (C) 2004--2012 Han-Wen Nienhuys -(c) 2004 Han-Wen Nienhuys + LilyPond is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - */ + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . +*/ #include "line-interface.hh" -#include "stencil.hh" + +#include "font-interface.hh" #include "grob.hh" -#include "staff-symbol-referencer.hh" #include "lookup.hh" -#include "paper-def.hh" +#include "output-def.hh" +#include "staff-symbol-referencer.hh" + +Stencil +Line_interface::make_arrow (Offset begin, Offset end, + Real thick, + Real length, Real width) +{ + Real angle = (end - begin).arg (); + vector points; + + points.push_back (Offset (0, 0)); + points.push_back (Offset (-length, width)); + points.push_back (Offset (-length, -width)); + + for (vsize i = 0; i < points.size (); i++) + points[i] = points[i] * complex_exp (Offset (0, angle)) + end; + + return Lookup::round_filled_polygon (points, thick); +} + +Stencil +Line_interface::make_trill_line (Grob *me, + Offset from, + Offset to) +{ + Offset dz = (to - from); + + Font_metric *fm = Font_interface::get_default_font (me); + + 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); + } + + return total; +} Stencil Line_interface::make_dashed_line (Real thick, Offset from, Offset to, - Real dash_period, Real dash_fraction) + Real dash_period, Real dash_fraction) { - dash_fraction = (dash_fraction >? 0) get_property ("thickness"), 1); + Real ss = Staff_symbol_referencer::staff_space (me); + + Real len = robust_scm2double (me->get_property ("arrow-length"), 1.3 * ss); + Real wid = robust_scm2double (me->get_property ("arrow-width"), 0.5 * ss); + + if (to_arrow) + a.add_stencil (make_arrow (from, to, thick, len, wid)); + + if (from_arrow) + a.add_stencil (make_arrow (to, from, thick, len, wid)); + } + + return a; +} + Stencil Line_interface::line (Grob *me, Offset from, Offset to) { Real thick = Staff_symbol_referencer::line_thickness (me) - * robust_scm2double (me->get_grob_property ("thickness"),1); - - SCM type = me->get_grob_property ("style"); + * 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); + else if (type == ly_symbol2scm ("none")) + return Stencil (); - SCM dash_fraction = me->get_grob_property ("dash-fraction"); - if (gh_number_p (dash_fraction) || type == ly_symbol2scm ("dotted-line")) + Stencil stencil; + + 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); - - fraction = (fraction >? 0) 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_grob_property ("dash-period"), 1.0); + * robust_scm2double (me->get_property ("dash-period"), 1.0); + + if (period <= 0) + return Stencil (); - if (period < 0) - return Stencil (); - - return 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 - { - return make_line (thick, from, to); - } + stencil = make_line (thick, from, to); + + return stencil; } -ADD_INTERFACE(Line_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.", - - "dash-period dash-fraction thickness style") +ADD_INTERFACE (Line_interface, + "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}," + " @code{zigzag} or @code{none} (a transparent line).\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.", + + /* properties */ + "arrow-length " + "arrow-width " + "dash-fraction " + "dash-period " + "style " + "thickness " + "zigzag-length " + "zigzag-width " + );