2 % feta-klef.mf -- implement Clefs
4 % source file of the Feta (Font-En-Tja) music font
6 % (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
9 fet_begingroup("klef");
12 def draw_staff(expr first, last)=
13 pickup pencircle scaled stafflinethickness;
14 for i:= first step 1 until last:
15 draw (- interline, i* interline) .. (4 interline, i* interline);
23 % Inspired by Baerenreiter and Breitkopf
26 % FIXME: right vertical tangent seems to be lower than the F-line
27 % FIXME: bulb curve smoothly into "long curve" on the inside
30 % [Wanske] says that the extreme x point should be exactly between
31 % the dots, but her picture shows that the extreme is ~ 0.2 ss lower
33 def draw_bass_klef(expr exact_center, reduction) =
34 save reduced_il, left_tilt, left_thick;
35 reduced_il# = interline# * reduction;
37 define_pixels(reduced_il);
38 left_thick = .25 reduced_il;
41 - xpart exact_center+ .2 reduced_il#,
42 xpart exact_center + 2.7 reduced_il#,
43 - ypart exact_center + 2.5 reduced_il#,
44 ypart exact_center +reduced_il#);
45 x1r - x1l = left_thick;
46 z1l = (hround_pixels(xpart exact_center),
47 vround_pixels(ypart exact_center));
51 x3l - x1l = 2.1 reduced_il;
53 x3l - x3r = .48 reduced_il;
54 y3l = -0.05 interline;
55 x4 = x1l - stafflinethickness;
57 z5 = (x3l + 1/3 reduced_il, .5 reduced_il);
59 penpos1(whatever, left_tilt);
60 penpos2(1.2 stafflinethickness, -90);
61 penpos3(whatever, 185);
62 penpos4(stafflinethickness, 135);
64 draw_bulb(1, z1r, z1l, .45 reduced_il, 1.0);
67 fill z1r{up} .. z2r{right} .. tension 1.0 .. z3r{down} .. {curl 0}
68 simple_serif(z4r, z4l, 90) {curl 0}
69 .. z3l{up} .. tension 0.9 .. z2l{left}
70 .. z1l{dir (-90 + left_tilt)} -- cycle;
74 pickup pencircle scaled (.35 reduced_il);
81 fet_beginchar("F clef ", "bass", "bassclef")
85 draw_bass_klef((.5 interline#, 0), 1.0);
87 fet_beginchar("F clef (reduced)", "bass_change", "cbassclef")
88 draw_bass_klef((.4 interline#, 0),0.8);
94 % Inspired by Baerenreiter
96 % FIXME top should be thinner at z8,
97 % FIXME bulb should curve (see bass clef)
98 % FIXME start (inside) should be little thinner
100 % FIXME should be a bit more upright
103 % Beste lezers, kijk,
105 % Een bolletje hebben we bij toeval allemaal wel eens getekend, maar begint u
106 % toch eenvoudig. Eerst een eenvoudig kruis of herstellingsteken
107 % en via de dubbelslag naar een voorzichtig vlaggetje, en heb geduld!
108 % Ikzelf heb bijvoorbeeld over mijn eerste gave G-sleutel
109 % 35 kilobyte metafont, 12 patchlevels, 0 vriendinnen en 45 dagen gedaan
111 def draw_gclef (expr exact_center, reduction)=
112 save reduced_il, downstroke_dir, downstroke_angle, hair, center;
113 save breapth_factor, inner_thick_end, thinness, thickness, thinnib;
114 save inner_start_angle, thinness, thinpen;
115 reduced_il# = interline# * reduction;
116 define_pixels(reduced_il);
117 pair downstroke_dir, center;
119 center := (hround_pixels(xpart exact_center),
120 vround_pixels(ypart exact_center));
122 hair = .3 stafflinethickness;
123 thinness = 1.3 stafflinethickness;
124 downstroke_dir = (14, -75);
125 breapth_factor = 11/7;
126 inner_thick_end = 45;
127 inner_start_angle = angle(-1,-2);
128 thickness = .4 reduced_il - hair;
130 thinnib = thinness - hair;
132 set_char_box(-xpart exact_center + breapth_factor* reduced_il#,
133 xpart exact_center + .66 breapth_factor* reduced_il#,
134 -ypart exact_center + 3 * reduced_il#,
135 ypart exact_center + 5 * reduced_il#);
137 pickup pencircle scaled hair;
139 downstroke_angle = angle downstroke_dir;
140 z1 = center + whatever * dir inner_start_angle;
141 x1 = xpart center -.28 reduced_il;
143 top z2r = center + (0,reduced_il + stafflinethickness/2);
145 x4 = xpart center - .1 reduced_il;
146 bot y4r = -(reduced_il + .5 stafflinethickness);
148 z3 = (z4 - center) rotated inner_thick_end + center;
150 z5r = (- breapth_factor, .37)* reduced_il + center;
151 penpos5(thickness, 135);
153 z6 = center + whatever * downstroke_dir;
154 y6 = ypart center + 2 reduced_il;
156 z7l - z6 = whatever *(z5- z6) ;
157 y7l = 3.5 reduced_il;
158 z8r = .4 [z9r, z7r] + 1.5 stafflinethickness * dir 52;
161 top y9l = 5 reduced_il;
164 y11 = -11/7 reduced_il;
166 y12 = ypart center - 18.5/7 reduced_il;
167 x12 = x11 - 5 /7 reduced_il;
169 z13 = z12 + .6 reduced_il*(-1,1);
171 (z10r - z10l) dotprod (unitvector downstroke_dir rotated 90) =
174 center - z10= whatever * downstroke_dir;
175 center - z11 = whatever * downstroke_dir;
177 penpos1(thinnib, inner_start_angle);
178 penpos2(thickness, 90);
179 penpos3(thinnib, -90 + inner_thick_end);
180 penpos4(thinnib, -90);
183 penpos7(thickness, 135);
184 penpos8(1.5 thinnib, - 70 + angle downstroke_dir);
185 penpos9(1.5 thickness, -80);
186 penpos10(whatever, downstroke_angle + 10);
187 penpos11(thinnib, downstroke_angle + 90);
188 penpos12(thinnib, -90);
189 penpos13(3 thinnib, 180);
192 filldraw z2l{right} .. z3l.. z4l{left} .. z5l{up} .. z7l{up}
195 {downstroke_dir}z10l --- z11l -- z11r --- z10r{- downstroke_dir}
199 .. z7r{down} .. z5r{down} .. z4r{right}
200 .. z3r .. z2r{left} ..
203 .. tension 0.85 ..cycle;
205 filldraw simple_serif(z1r, z1l, 90) -- cycle;
207 filldraw z12r{left} .. z13r{up} -- z13l{down} .. z12l{right} .. cycle;
209 draw_bulb(-1, z13l, lft z13r, 6/14 reduced_il, 1.0);
211 pickup pencircle scaled (thinpen);
212 draw z10 --- z11 .. z12{left};
214 penlabels(range 1 thru 15);
218 fet_beginchar("G clef", "violin", "violinclef")
222 draw_gclef((1.6 interline#,0), 1.0);
224 fet_beginchar("G clef", "violin_change", "cviolinclef")
225 draw_gclef((1.3 interline#,0), .8);
228 fet_endgroup("klef");