X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fline-interface.cc;h=9c16ece4106f956af5cb3a30cb4fc667065abab8;hb=90e4d7057f3857da049dfda3d130017d4719bd6b;hp=f936b0498f26d2abd1cd5e61d27938a36bf79e37;hpb=157d98c1870868bf59c1691577444e3c3d533bc4;p=lilypond.git diff --git a/lily/line-interface.cc b/lily/line-interface.cc index f936b0498f..9c16ece410 100644 --- a/lily/line-interface.cc +++ b/lily/line-interface.cc @@ -1,25 +1,36 @@ /* - 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--2015 Han-Wen Nienhuys - (c) 2004--2007 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 "staff-symbol-referencer.hh" +#include "font-interface.hh" +#include "grob.hh" #include "lookup.hh" #include "output-def.hh" -#include "grob.hh" -#include "font-interface.hh" +#include "staff-symbol-referencer.hh" Stencil Line_interface::make_arrow (Offset begin, Offset end, - Real thick, - Real length, Real width) + Real thick, + Real length, Real width) { - Real angle = (end - begin).arg (); + Offset dir = (end - begin).direction (); vector points; points.push_back (Offset (0, 0)); @@ -27,25 +38,19 @@ Line_interface::make_arrow (Offset begin, Offset end, points.push_back (Offset (-length, -width)); for (vsize i = 0; i < points.size (); i++) - points[i] = points[i] * complex_exp (Offset (0, angle)) + end; + points[i] = points[i] * dir + end; return Lookup::round_filled_polygon (points, thick); } Stencil Line_interface::make_trill_line (Grob *me, - Offset from, - Offset to) + 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); + Offset dz = (to - from); - Font_metric *fm = select_font (me->layout (), - scm_cons (style_alist, - alist_chain)); + Font_metric *fm = Font_interface::get_default_font (me); Stencil elt = fm->find_by_name ("scripts.trill_element"); elt.align_to (Y_AXIS, CENTER); @@ -55,7 +60,7 @@ Line_interface::make_trill_line (Grob *me, programming_error ("can't find scripts.trill_element"); return Stencil (); } - + Stencil line; Real len = 0.0; do @@ -65,22 +70,21 @@ Line_interface::make_trill_line (Grob *me, } while (len + elt_len < dz.length ()); - line.rotate (dz.arg (), Offset (LEFT, CENTER)); + line.rotate (dz.angle_degrees (), Offset (LEFT, CENTER)); line.translate (from); - return line; + return line; } - Stencil Line_interface::make_zigzag_line (Grob *me, - Offset from, - Offset to) + Offset from, + Offset to) { - Offset dz = to -from; + 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? + thick *= robust_scm2double (me->get_property ("thickness"), 1.0); // todo: staff sym referencer? Real staff_space = Staff_symbol_referencer::staff_space (me); @@ -91,7 +95,7 @@ Line_interface::make_zigzag_line (Grob *me, 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 rotation_factor = dz.direction (); Offset points[3]; points[0] = Offset (0, -h / 2); @@ -111,32 +115,25 @@ Line_interface::make_zigzag_line (Grob *me, 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 ()); + 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 = min (max (dash_fraction, 0.0), 1.0); - Real on = dash_fraction * dash_period + thick; + Real on = dash_fraction * dash_period; Real off = max (0.0, dash_period - on); SCM at = scm_list_n (ly_symbol2scm ("dashed-line"), - scm_from_double (thick), - scm_from_double (on), - scm_from_double (off), - scm_from_double (to[X_AXIS] - from[X_AXIS]), - scm_from_double (to[Y_AXIS] - from[Y_AXIS]), - scm_from_double (0.0), - SCM_UNDEFINED); + scm_from_double (thick), + scm_from_double (on), + scm_from_double (off), + scm_from_double (to[X_AXIS] - from[X_AXIS]), + scm_from_double (to[Y_AXIS] - from[Y_AXIS]), + scm_from_double (0.0), + SCM_UNDEFINED); Box box; box.add_point (Offset (0, 0)); @@ -154,12 +151,12 @@ Stencil Line_interface::make_line (Real th, Offset from, Offset to) { SCM at = scm_list_n (ly_symbol2scm ("draw-line"), - scm_from_double (th), - scm_from_double (from[X_AXIS]), - scm_from_double (from[Y_AXIS]), - scm_from_double (to[X_AXIS]), - scm_from_double (to[Y_AXIS]), - SCM_UNDEFINED); + scm_from_double (th), + scm_from_double (from[X_AXIS]), + scm_from_double (from[Y_AXIS]), + scm_from_double (to[X_AXIS]), + scm_from_double (to[Y_AXIS]), + SCM_UNDEFINED); Box box; box.add_point (from); @@ -173,24 +170,24 @@ Line_interface::make_line (Real th, Offset from, Offset to) Stencil Line_interface::arrows (Grob *me, Offset from, Offset to, - bool from_arrow, - bool to_arrow) + bool from_arrow, + bool to_arrow) { Stencil a; if (from_arrow || to_arrow) { Real thick = Staff_symbol_referencer::line_thickness (me) - * robust_scm2double (me->get_property ("thickness"), 1); + * robust_scm2double (me->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)); + a.add_stencil (make_arrow (from, to, thick, len, wid)); if (from_arrow) - a.add_stencil (make_arrow (to, from, thick, len, wid)); + a.add_stencil (make_arrow (to, from, thick, len, wid)); } return a; @@ -200,69 +197,76 @@ Stencil Line_interface::line (Grob *me, Offset from, Offset to) { Real thick = Staff_symbol_referencer::line_thickness (me) - * robust_scm2double (me->get_property ("thickness"), 1); + * 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")) + if (scm_is_eq (type, ly_symbol2scm ("zigzag"))) + return make_zigzag_line (me, from, to); + else if (scm_is_eq (type, ly_symbol2scm ("trill"))) return make_trill_line (me, from, to); - - Stencil stil; + else if (scm_is_eq (type, ly_symbol2scm ("none"))) + return Stencil (); - SCM dash_fraction = me->get_property ("dash-fraction"); - if (scm_is_number (dash_fraction) || type == ly_symbol2scm ("dotted-line")) + Stencil stencil; + + if (scm_is_eq (type, ly_symbol2scm ("dashed-line")) + || scm_is_eq (type, ly_symbol2scm ("dotted-line"))) { Real fraction - = type == ly_symbol2scm ("dotted-line") - ? 0.0 - : robust_scm2double (dash_fraction, 0.4); + = scm_is_eq (type, ly_symbol2scm ("dotted-line")) + ? 0.0 + : 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); + * robust_scm2double (me->get_property ("dash-period"), 1.0); if (period <= 0) - return Stencil (); - - 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; - } - stil = make_dashed_line (thick, from, to, period, fraction); + return Stencil (); + + Real len = (to - from).length (); + /* + Dashed lines should begin and end with a dash. Therefore, + there will be one more dash than complete dash + whitespace + units (full periods). + */ + int full_period_count = + (int) rint ((len - period * fraction) / period); + full_period_count = max (0, full_period_count); + if (full_period_count > 0) + { + /* + TODO: figure out something intelligent for really short + sections. + */ + period = len / (fraction + full_period_count); + } + 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.", - - /* properties */ - "dash-period " - "dash-fraction " - "thickness " - "style " - "zigzag-length " - "zigzag-width " - "arrow-length " - "arrow-width ") - + "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 " + );