X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fspacing-basic.cc;h=ff245aa30fdd438b17efced4c3fa1ebc64eb28d2;hb=a6a51abfd0195a3cf7d6ea095cf69808852f21ce;hp=7545ec4e5b94723f384c94ed9753bcd2d3cbd7b4;hpb=0387f04497978e37b335a8b99eec905499d6ad0f;p=lilypond.git diff --git a/lily/spacing-basic.cc b/lily/spacing-basic.cc index 7545ec4e5b..ff245aa30f 100644 --- a/lily/spacing-basic.cc +++ b/lily/spacing-basic.cc @@ -1,9 +1,20 @@ /* - spacing-basic.cc -- implement Spacing_spanner, simplistic spacing routines + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 2005--2015 Han-Wen Nienhuys - (c) 2005--2008 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 "spacing-spanner.hh" @@ -30,69 +41,78 @@ Spring Spacing_spanner::standard_breakable_column_spacing (Grob *me, Item *l, Item *r, Spacing_options const *options) { Real min_dist = max (0.0, Paper_column::minimum_distance (l, r)); - Real ideal; if (Paper_column::is_breakable (l) && Paper_column::is_breakable (r)) { - Moment *dt = unsmob_moment (l->get_property ("measure-length")); + Moment *dt = unsmob (l->get_property ("measure-length")); Moment mlen (1); if (dt) - mlen = *dt; + mlen = *dt; Real incr = robust_scm2double (me->get_property ("spacing-increment"), 1); + Real space = incr * double (mlen.main_part_ / options->global_shortest_) * 0.8; + Spring spring = Spring (min_dist + space, min_dist); - ideal = min_dist + incr * double (mlen.main_part_ / options->global_shortest_) * 0.8; + /* + By default, the spring will have an inverse_stretch_strength of space+min_dist. + However, we don't want stretchability to scale with min_dist or else an + empty first measure on a line (which has a large min_dist because of the clef) + will stretch much more than an empty measure later in the line. + */ + spring.set_inverse_stretch_strength (space); + return spring; } - else + + Moment dt = Paper_column::when_mom (r) - Paper_column::when_mom (l); + Real ideal; + + if (dt == Moment (0, 0)) { - Moment dt = Paper_column::when_mom (r) - Paper_column::when_mom (l); - - if (dt == Moment (0, 0)) - { - /* - In this case, Staff_spacing should handle the job, - using dt when it is 0 is silly. - */ - ideal = min_dist + 0.5; - } - else - ideal = min_dist + options->get_duration_space (dt.main_part_); + /* + In this case, Staff_spacing should handle the job, + using dt when it is 0 is silly. + */ + ideal = min_dist + 0.5; } + else + ideal = min_dist + options->get_duration_space (dt.main_part_); + return Spring (ideal, min_dist); } Moment * get_measure_length (Grob *column) { - Grob * sys = column->get_parent (X_AXIS); + Grob *sys = column->get_parent (X_AXIS); extract_grob_set (sys, "columns", cols); vsize col_idx = Paper_column::get_rank (column); - + do { - if (Moment *len = unsmob_moment (cols[col_idx]->get_property ("measure-length"))) - { - return len; - } + if (Moment *len = unsmob (cols[col_idx]->get_property ("measure-length"))) + { + return len; + } } while (col_idx-- != 0); - + return 0; } -Real -Spacing_spanner::note_spacing (Grob *me, Grob *lc, Grob *rc, - Spacing_options const *options) +/* Basic spring based on duration alone */ +Spring +Spacing_spanner::note_spacing (Grob * /* me */, + Grob *lc, + Grob *rc, + Spacing_options const *options) { - (void) me; - Moment shortest_playing_len = 0; SCM s = lc->get_property ("shortest-playing-duration"); - if (unsmob_moment (s)) - shortest_playing_len = *unsmob_moment (s); + if (unsmob (s)) + shortest_playing_len = *unsmob (s); if (! shortest_playing_len.to_bool ()) { @@ -119,36 +139,45 @@ Spacing_spanner::note_spacing (Grob *me, Grob *lc, Grob *rc, delta_t = min (delta_t, *measure_len); /* - The following is an extra safety measure, such that - the length of a mmrest event doesn't cause havoc. + The following is an extra safety measure, such that + the length of a mmrest event doesn't cause havoc. */ shortest_playing_len = min (shortest_playing_len, *measure_len); } - Real dist = 0.0; + Spring ret; if (delta_t.main_part_ && !lwhen.grace_part_) { - dist = options->get_duration_space (shortest_playing_len.main_part_); - dist *= double (delta_t.main_part_ / shortest_playing_len.main_part_); + // A spring of length and stiffness based on the controlling duration + Real len = options->get_duration_space (shortest_playing_len.main_part_); + Real min = options->increment_; // canonical notehead width + + // The portion of that spring proportional to the time between lc and rc + Real fraction = (delta_t.main_part_ / shortest_playing_len.main_part_); + ret = Spring (fraction * len, fraction * min); + + // Stretch proportional to the space between canonical bare noteheads + ret.set_inverse_stretch_strength (fraction * max (0.1, (len - min))); } else if (delta_t.grace_part_) { - /* - Crude hack for spacing graces: we take the shortest space - available (namely the space for the global shortest note), and - multiply that by grace-space-factor - */ - dist = options->get_duration_space (options->global_shortest_) / 2.0; - Grob *grace_spacing = unsmob_grob (lc->get_object ("grace-spacing")); + Grob *grace_spacing = unsmob (lc->get_object ("grace-spacing")); if (grace_spacing) - { - Spacing_options grace_opts; - grace_opts.init_from_grob (grace_spacing); - dist = grace_opts.get_duration_space (delta_t.grace_part_); - } - + { + Spacing_options grace_opts; + grace_opts.init_from_grob (grace_spacing); + Real len = grace_opts.get_duration_space (delta_t.grace_part_); + Real min = grace_opts.increment_; + ret = Spring (len, min); + // Grace notes should not stretch very much + ret.set_inverse_stretch_strength (grace_opts.increment_ / 2.0); + } + else // Fallback to the old grace spacing: half that of the shortest note + ret = Spring (options-> + get_duration_space (options->global_shortest_) / 2.0, + options->increment_ / 2.0); } - return dist; + return ret; }