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>,
7 % Jan Nieuwenhuizen <jan@digicash.com>
9 fet_begingroup("klef");
11 def draw_staff(expr first, last)=
12 pickup pencircle scaled stafflinethickness;
13 for i:= first step 1 until last:
14 draw (- interline, i* interline) .. (4 interline, i* interline);
18 def draw_c_clef (expr reduction) =
19 save hair, norm, reduced_il;
20 reduced_il#=interline#*reduction;
21 norm#:=2/3reduced_il#;
23 define_pixels (hair,norm,reduced_il);
24 set_char_box (0, 11/4interline#, 2 reduced_il#, 2 reduced_il#);
26 draw_block ((0,-d), (1/2reduced_il,h));
27 draw_block ((1/2reduced_il+stafflinethickness,-d),
28 (1/2reduced_il+2stafflinethickness,h));
31 xoff=1/2reduced_il+2hair;
33 z1l=(xoff+norm+hair/2,h);
34 penpos2(norm-hair,180);
37 z3=(((w-xoff)/2)+xoff,2hair);
39 z4=(xoff+hair+1/2norm+hair,y3);
42 z6r=(xoff+norm+hair,-d);
46 p = z4r{right}..z3r{right}..tension t..z2r{up}
47 ..z1r{left}..z1l{right}..z2l{down}
48 ..z3l{left}..z4l{left};
49 pickup pencircle scaled 1pt#;
51 % draw p..(p yscaled -1)..cycle;
53 fill (p yscaled -1)..cycle;
56 % ugh, should be bulb, not flare
57 draw_flare(z1l,180,90,hair,norm);
58 draw_flare(z6r,180,-90,hair,norm+hair);
61 fet_beginchar ("C clef", "ugh_alto", "ugh_altoclef")
68 fet_beginchar ("C clef", "ugh_alto_change", "ugh_caltoclef")
73 % Inspired by Baerenreiter and Breitkopf
76 % FIXME: right vertical tangent seems to be lower than the F-line
77 % FIXME: bulb curve smoothly into "long curve" on the inside
80 % [Wanske] says that the extreme x point should be exactly between
81 % the dots, but her picture shows that the extreme is ~ 0.2 ss lower
83 def draw_bass_klef(expr exact_center, reduction) =
84 save reduced_il, left_tilt, left_thick;
85 reduced_il# = interline# * reduction;
87 define_pixels(reduced_il);
88 left_thick = .25 reduced_il;
91 - xpart exact_center+ .2 reduced_il#,
92 xpart exact_center + 2.7 reduced_il#,
93 - ypart exact_center + 2.5 reduced_il#,
94 ypart exact_center +reduced_il#);
95 x1r - x1l = left_thick;
96 z1l = (hround_pixels(xpart exact_center),
97 vround_pixels(ypart exact_center));
101 x3l - x1l = 2.1 reduced_il;
103 x3l - x3r = .48 reduced_il;
104 y3l = -0.05 interline;
105 x4 = x1l - stafflinethickness;
106 y4 = -2.2 reduced_il;
107 z5 = (x3l + 1/3 reduced_il, .5 reduced_il);
109 penpos1(whatever, left_tilt);
110 penpos2(1.2 stafflinethickness, -90);
111 penpos3(whatever, 185);
112 penpos4(stafflinethickness, 135);
114 draw_bulb(1, z1r, z1l, .45 reduced_il, 1.0);
117 fill z1r{up} .. z2r{right} .. tension 1.0 .. z3r{down} .. {curl 0}
118 simple_serif(z4r, z4l, 90) {curl 0}
119 .. z3l{up} .. tension 0.9 .. z2l{left}
120 .. z1l{dir (-90 + left_tilt)} -- cycle;
124 pickup pencircle scaled (.35 reduced_il);
131 fet_beginchar("F clef ", "bass", "bassclef")
135 draw_bass_klef((.5 interline#, 0), 1.0);
137 fet_beginchar("F clef (reduced)", "bass_change", "cbassclef")
138 draw_bass_klef((.4 interline#, 0),0.8);
144 % Inspired by Baerenreiter
146 % FIXME top should be thinner at z8,
147 % FIXME bulb should curve (see bass clef)
148 % FIXME start (inside) should be little thinner
150 % FIXME should be a bit more upright
153 % Beste lezers, kijk,
155 % Een bolletje hebben we bij toeval allemaal wel eens getekend, maar begint u
156 % toch eenvoudig. Eerst een eenvoudig kruis of herstellingsteken
157 % en via de dubbelslag naar een voorzichtig vlaggetje, en heb geduld!
158 % Ikzelf heb bijvoorbeeld over mijn eerste gave G-sleutel
159 % 35 kilobyte metafont, 12 patchlevels, 0 vriendinnen en 45 dagen gedaan
161 def draw_gclef (expr exact_center, reduction)=
162 save reduced_il, downstroke_dir, downstroke_angle, hair, center;
163 save breapth_factor, inner_thick_end, thinness, thickness, thinnib;
164 save inner_start_angle, thinness, thinpen;
165 reduced_il# = interline# * reduction;
166 define_pixels(reduced_il);
167 pair downstroke_dir, center;
169 center := (hround_pixels(xpart exact_center),
170 vround_pixels(ypart exact_center));
172 hair = .3 stafflinethickness;
173 thinness = 1.3 stafflinethickness;
174 downstroke_dir = (14, -75);
175 breapth_factor = 11/7;
176 inner_thick_end = 45;
177 inner_start_angle = angle(-1,-2);
178 thickness = .4 reduced_il - hair;
180 thinnib = thinness - hair;
182 set_char_box(-xpart exact_center + breapth_factor* reduced_il#,
183 xpart exact_center + .66 breapth_factor* reduced_il#,
184 -ypart exact_center + 3 * reduced_il#,
185 ypart exact_center + 5 * reduced_il#);
187 pickup pencircle scaled hair;
189 downstroke_angle = angle downstroke_dir;
190 z1 = center + whatever * dir inner_start_angle;
191 x1 = xpart center -.28 reduced_il;
193 top z2r = center + (0,reduced_il + stafflinethickness/2);
195 x4 = xpart center - .1 reduced_il;
196 bot y4r = -(reduced_il + .5 stafflinethickness);
198 z3 = (z4 - center) rotated inner_thick_end + center;
200 z5r = (- breapth_factor, .37)* reduced_il + center;
201 penpos5(thickness, 135);
203 z6 = center + whatever * downstroke_dir;
204 y6 = ypart center + 2 reduced_il;
206 z7l - z6 = whatever *(z5- z6) ;
207 y7l = 3.5 reduced_il;
208 z8r = .4 [z9r, z7r] + 1.5 stafflinethickness * dir 52;
211 top y9l = 5 reduced_il;
214 y11 = -11/7 reduced_il;
216 y12 = ypart center - 18.5/7 reduced_il;
217 x12 = x11 - 5 /7 reduced_il;
219 z13 = z12 + .6 reduced_il*(-1,1);
221 (z10r - z10l) dotprod (unitvector downstroke_dir rotated 90) =
224 center - z10= whatever * downstroke_dir;
225 center - z11 = whatever * downstroke_dir;
227 penpos1(thinnib, inner_start_angle);
228 penpos2(thickness, 90);
229 penpos3(thinnib, -90 + inner_thick_end);
230 penpos4(thinnib, -90);
233 penpos7(thickness, 135);
234 penpos8(1.5 thinnib, - 70 + angle downstroke_dir);
235 penpos9(1.5 thickness, -80);
236 penpos10(whatever, downstroke_angle + 10);
237 penpos11(thinnib, downstroke_angle + 90);
238 penpos12(thinnib, -90);
239 penpos13(3 thinnib, 180);
242 filldraw z2l{right} .. z3l.. z4l{left} .. z5l{up} .. z7l{up}
245 {downstroke_dir}z10l --- z11l -- z11r --- z10r{- downstroke_dir}
249 .. z7r{down} .. z5r{down} .. z4r{right}
250 .. z3r .. z2r{left} ..
253 .. tension 0.85 ..cycle;
255 filldraw simple_serif(z1r, z1l, 90) -- cycle;
257 filldraw z12r{left} .. z13r{up} -- z13l{down} .. z12l{right} .. cycle;
259 draw_bulb(-1, z13l, lft z13r, 6/14 reduced_il, 1.0);
261 pickup pencircle scaled (thinpen);
262 draw z10 --- z11 .. z12{left};
264 penlabels(range 1 thru 15);
268 fet_beginchar("G clef", "violin", "violinclef")
272 draw_gclef((1.6 interline#,0), 1.0);
274 fet_beginchar("G clef", "violin_change", "cviolinclef")
275 draw_gclef((1.3 interline#,0), .8);
278 fet_endgroup("klef");