/usr/share/lilypond/2.16.2/fonts/source/parmesan-macros.mf is in lilypond-data 2.16.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 | % Feta (not the Font-En-Tja) music font -- macros for parmesan font
% This file is part of LilyPond, the GNU music typesetter.
%
% Copyright (C) 2001--2012 Juergen Reuter <reuter@ipd.uka.de>
%
%
% 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 <http://www.gnu.org/licenses/>.
%
% Find point on `curve' which gives the tangent between point `p'
% and `curve'. To guide the search, two auxiliary points must be
% specified, `p_in' and `p_out'. The line between `p' and `p_in'
% must intersect `curve', while the line between `p' and `p_out'
% must not.
%
def find_tangent (expr p, curve, p_in, p_out) =
begingroup;
save mid, t, t_good, in, out;
pair mid, in, out;
in := p_in;
out := p_out;
forever:
mid := 0.5 [in, out];
exitif abs (out - mid) <= eps;
t := xpart (curve intersectiontimes (p -- mid));
if t > 0:
in := mid;
t_good := t;
else:
out := mid;
fi;
endfor;
point t_good of curve
endgroup
enddef;
%
% Shift `curve' along the line given by the auxiliary points `p_in'
% and `p_out' until `line' is a tangent, and return the shift.
% If `curve' is shifted to position `p_in', it must intersect
% `line', while shifted to `p_out' it must not.
%
def find_tangent_shift (expr line, curve, p_in, p_out) =
begingroup;
save mid, t, in, out;
pair mid, in, out;
in := p_in;
out := p_out;
forever:
mid := 0.5 [in, out];
exitif abs (out - mid) <= eps;
t := xpart ((curve shifted mid) intersectiontimes line);
if t > 0:
in := mid;
else:
out := mid;
fi;
endfor;
mid
endgroup
enddef;
%
% Get subpath specified by `dir_in' and `dir_out' of `curve'
% which is then shifted by `offset'. Assure that result has
% the same orientation as `curve'.
%
def get_subpath (expr curve, dir_in, dir_out, offset) =
begingroup;
save t_in, t_out;
t_in := directiontime dir_in of curve;
t_out := directiontime dir_out of curve;
if t_in > t_out:
t_out := t_out + length curve;
fi;
(subpath (t_in, t_out) of curve) shifted offset
endgroup
enddef;
%
% Get point specified by `dir_' of `curve' which is then
% shifted by `offset'.
%
def get_subpoint (expr curve, dir_, offset) =
(directionpoint dir_ of curve) shifted offset
enddef;
%
% This is the same as `get_subpath', except that the time values
% used to construct the resulting subpath are rounded to integers.
%
def get_subpath_i (expr curve, dir_in, dir_out, offset) =
begingroup;
save t_in, t_out;
t_in := directiontime dir_in of curve;
t_out := directiontime dir_out of curve;
if t_in > t_out:
t_out := t_out + length curve;
fi;
(subpath (floor (t_in + 0.5), floor (t_out + 0.5)) of curve)
shifted offset
endgroup
enddef;
%
% Find envelope cusp created by `object' moved along `curve', using
% step value `s' for initial intermediate points. `s' must be small
% enough so that this macro finds at least one point on the envelope
% between the `entrance' and `exit' points of the cusp which has
% a significantly different direction vector.
%
% This function returns a time value on `curve'; if there is no
% cusp, it returns -1.
%
def find_envelope_cusp (expr object, curve, s) =
begingroup;
save mid, p, t, t_good, delta, start, stop, do_exit;
pair p[];
boolean do_exit;
p0 := (directionpoint (direction 0 of curve) of object)
shifted (point 0 of curve);
p1 := (directionpoint (direction s of curve) of object)
shifted (point s of curve);
t := s;
forever:
t := t + s;
exitif t >= length curve;
p2 := (directionpoint (direction t of curve) of object)
shifted (point t of curve);
if p2 <> p1:
delta := angle (p2 - p1) - angle (p1 - p0);
if delta > 180:
delta := delta - 360;
fi;
% we check for a direction change by more than
% than 45 degrees
if abs (delta) >= 45:
do_exit := true;
else:
do_exit := false;
fi;
p0 := p1;
p1 := p2;
fi;
% having `exitif' within an if-clause doesn't work
exitif do_exit;
endfor;
if t >= length curve:
t_good := -1;
else:
% the wanted point lies between `t - s' and `t'
start := t - s;
stop := t;
t_good := start;
forever:
mid := 0.5 [start, stop];
exitif abs (stop - mid) <= eps;
p0 := (directionpoint (direction start of curve)
of object) shifted (point start of curve);
p1 := (directionpoint (direction mid of curve)
of object) shifted (point mid of curve);
p2 := (directionpoint (direction stop of curve)
of object) shifted (point stop of curve);
exitif (length (p1 - p0) = 0)
or (length (p2 - p1) = 0);
delta := angle (p2 - p1) - angle (p1 - p0);
if delta > 180:
delta := delta - 360;
fi;
if abs (delta) >= 45:
stop := mid;
t_good := mid;
else:
start := mid;
t_good := stop;
fi;
endfor;
fi;
t_good
endgroup
enddef;
% EOF
|