% Feta (not the Font-En-Tja) music font -- draw accordion symbols
% This file is part of LilyPond, the GNU music typesetter.
%
-% Copyright (C) 1998--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+% Copyright (C) 1998--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
%
% LilyPond is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
x3 = x1;
bot y3 = 0;
- draw z1
- -- z2
- -- z3;
+ save nw_offset, ne_offset;
+ pair nw_offset, ne_offset;
+ save sw_offset, se_offset, line_radius;
+ pair sw_offset, se_offset;
+
+ line_radius := linewidth / 2;
+ nw_offset := line_radius * unitvector (z1 - z2);
+ ne_offset := nw_offset rotated -90;
+ sw_offset := line_radius * unitvector (z3 - z2);
+ se_offset := sw_offset rotated 90;
+
+ z4 = ((z1 - ne_offset)
+ -- (z2 - ne_offset))
+ intersectionpoint
+ ((z2 - se_offset)
+ -- (z3 - se_offset));
+
+ fill z1 + ne_offset
+ -- z2 + ne_offset
+ .. rt z2 {down}
+ .. z2 + se_offset
+ -- z3 + se_offset
+ .. z3 + sw_offset {- se_offset}
+ .. z3 - se_offset
+ -- z4
+ -- z1 - ne_offset
+ .. z1 + nw_offset {ne_offset}
+ .. cycle;
fet_endchar;