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% -*- Fundamental -*- (emacs-20 mf mode sucks)
% feta-slag.mf -- implement trill symbols
%
% source file of the Feta (definitely not an abbreviation for Font-En-Tja)
% music font
%
% (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
%
% this file is included by feta-scripts.mf
trill_thin# = 0.1 staff_space# + 0.6 stafflinethickness#;
trill_stemwidth# = trill_thin#;
define_pixels (trill_thin);
define_whole_blacker_pixels (trill_stemwidth);
trill_thick = 1/2 staff_space;
trill_overlap = 1/6 staff_space;
trill_width# = 5/6 staff_space#;
trill_height# = 1/2 staff_space#;
define_pixels (trill_height);
define_whole_pixels (trill_width);
pair trill_ne;
trill_ne := unitvector ((2, 3));
%
% The trill element sticks out on both the left and right side
% of the normal bbox, so you can glue them together easily.
%
% `ending' is either 0 for none, 1 for left, or 2 for right.
%
def draw_trillelement (expr offset, ending) =
clearxy;
begingroup;
save nw, pat, nw_dist, ne_dist;
pair nw, nw_dist, ne_dist;
path pat;
pickup pencircle scaled trill_thin;
x1 = -.5 trill_width;
y1 = 0;
z3 = whatever * trill_ne + z1;
top y3 = vround trill_height;
z2 = z3 - (trill_thick - trill_thin) * trill_ne;
bot z3' = (top z3) scaled -1;
nw = unitvector (z2 - z3');
ne_dist = (nw rotated -90) * 0.5 trill_thin;
nw_dist = (trill_ne rotated 90) * 0.5 trill_thin;
z5 = whatever * trill_ne + (z1 - nw_dist);
z5 = whatever * nw + (z3' - ne_dist);
pat := z5
-- (z1 - nw_dist){-trill_ne}
-- (z1 + nw_dist){trill_ne}
-- (z3 + nw_dist){trill_ne}
.. top z3{right}
.. (z3 + ne_dist){-nw};
pat := pat
-- pat scaled -1 shifted (-feta_eps, -feta_eps)
-- cycle;
pat := pat shifted (offset, 0);
fill pat;
z4 = z1 - trill_ne * trill_overlap;
x4 := hround (x4 + 0.5 trill_thin) - 0.5 trill_thin;
pat := (z4 - nw_dist){-trill_ne}
.. bot z4{left}
.. lft z4{up}
.. (z4 + nw_dist){trill_ne}
-- (z1 + nw_dist){trill_ne}
-- (z1 - nw_dist){-trill_ne}
-- cycle;
if ending = 1:
fill pat shifted (offset, 0);
elseif ending = 2:
pat := pat scaled -1 shifted (-feta_eps, -feta_eps);
fill pat shifted (offset, 0);
fi;
endgroup;
enddef;
fet_beginchar ("trilelement", "trilelement");
set_char_box (.5 trill_width#, .5 trill_width#,
trill_height#, trill_height#);
draw_trillelement (0, 0);
labels (1, 2, 3, 3', 4, 5, 5');
fet_endchar;
fet_beginchar ("prall", "prall");
set_char_box (trill_width#, trill_width#,
trill_height#, trill_height#);
draw_trillelement (-hround (.5 trill_width), 1);
draw_trillelement (-hround (.5 trill_width) + trill_width, 2);
fet_endchar;
fet_beginchar ("mordent", "mordent");
set_char_box (trill_width#, trill_width#,
4/3 trill_height#, 4/3 trill_height#);
draw_trillelement (-hround (.5 trill_width), 1);
draw_trillelement (-hround (.5 trill_width) + trill_width, 2);
clearxy;
pickup pencircle scaled trill_stemwidth;
top y1 = h;
bot y2 = -d;
x1 = x2;
x2 = 0;
draw_gridline (z2, z1, trill_stemwidth);
labels (1, 2);
fet_endchar;
fet_beginchar ("prallprall", "prallprall");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, trill_height#);
draw_trillelement (-trill_width, 1);
draw_trillelement (0, 0);
draw_trillelement (trill_width, 2);
fet_endchar;
fet_beginchar ("prallmordent", "prallmordent");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
4/3 trill_height#, 4/3 trill_height#);
draw_trillelement (-trill_width, 1);
draw_trillelement (0, 0);
draw_trillelement (trill_width, 2);
clearxy;
pickup pencircle scaled trill_stemwidth;
top y1 = h;
bot y2 = -d;
x1 = x2 ;
x2 = good.x (.5 trill_width);
draw_gridline (z2, z1, trill_stemwidth);
labels (1, 2);
fet_endchar;
save remember_pic;
picture remember_pic;
fet_beginchar ("upprall", "upprall");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, trill_height#);
draw_trillelement (-trill_width, 1);
draw_trillelement (0, 0);
draw_trillelement (trill_width, 2);
z11 = z4 shifted (-trill_width, 0);
z12 = z11 + (0, -2 trill_height);
penpos11 (trill_thin, angle (trill_ne) - 90);
penpos12 (trill_thin, angle (trill_ne yscaled -1) + 90);
penlabels (11, 12);
pickup pencircle scaled trill_stemwidth;
fill z11l{-trill_ne}
.. z12l{trill_ne yscaled -1}
.. bot z12
.. rt z12
.. z12r{-trill_ne yscaled -1}
.. z11r{trill_ne}
-- cycle;
remember_pic := currentpicture;
fet_endchar;
fet_beginchar ("upmordent", "upmordent");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
4/3 trill_height#, 4/3 trill_height#);
currentpicture := remember_pic;
clearxy;
pickup pencircle scaled trill_stemwidth;
top y1 = h;
bot y2 = -d;
x1 = x2;
x2 = good.x (.5 trill_width);
draw_gridline (z2, z1, trill_stemwidth);
labels (1, 2);
fet_endchar;
fet_beginchar ("pralldown", "pralldown");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, trill_height#);
currentpicture := remember_pic xscaled -1;
fet_endchar;
fet_beginchar ("downprall", "downprall");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, trill_height#);
draw_trillelement (-trill_width, 1);
draw_trillelement (0, 0);
draw_trillelement (trill_width, 2);
z11 = z4 shifted (-trill_width, 0);
z12 = z11 + (0, 2 trill_height);
penpos11 (trill_thin, angle (trill_ne xscaled -1) - 90);
penpos12 (trill_thin, angle (trill_ne) - 90);
penlabels (11, 12);
pickup pencircle scaled trill_stemwidth;
fill z11l{trill_ne xscaled -1}
.. z12l{trill_ne}
.. top z12
.. rt z12
.. z12r{-trill_ne}
.. z11r{-trill_ne xscaled -1}
-- cycle;
remember_pic := currentpicture;
fet_endchar;
fet_beginchar ("downmordent", "downmordent");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
4/3 trill_height#, 4/3 trill_height#);
currentpicture := remember_pic;
clearxy;
pickup pencircle scaled trill_stemwidth;
top y1 = h;
bot y2 = -d;
x1 = x2;
x2 = good.x (.5 trill_width);
draw_gridline (z2, z1, trill_stemwidth);
labels (1, 2);
fet_endchar;
fet_beginchar ("prallup", "prallup");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, trill_height#);
currentpicture := remember_pic xscaled -1;
fet_endchar;
fet_beginchar ("lineprall", "lineprall");
set_char_box (1.5 trill_width#, 1.5 trill_width#,
trill_height#, 4 trill_height#);
draw_trillelement (-trill_width, 1);
labels (1, 2, 3, 3', 4, 5, 5');
pickup pencircle scaled trill_stemwidth;
penpos10 (trill_stemwidth, 0);
penpos11 (trill_stemwidth, 0);
x10l = x4 - .5 trill_thin - trill_width;
y10 = y4;
z11 = z10 + (0, h);
penlabels (10, 11);
fill z11l
.. top z11
.. z11r
-- z10r
-- z10l
-- cycle;
draw_trillelement (0, 0);
draw_trillelement (trill_width, 2);
fet_endchar;
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