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>
12 fet_begingroup("clefs");
15 % [Ross] says that clefs take 1 interline space on the left and right
17 def set_horizontal_spacing =
18 save left_space ,right_space;
19 left_space# = reduced_il#;
20 right_space# = reduced_il#;
23 def draw_staff(expr first, last)=
24 pickup pencircle scaled stafflinethickness;
25 for i:= first step 1 until last:
26 draw (- interline, i* interline) .. (4 interline, i* interline);
30 % [Wanske] says the bulbs should be positioned about 1/4 right of the
32 def draw_c_clef (expr reduction) =
33 save hair, norm, reduced_il, right_edge;
34 reduced_il#=interline#*reduction;
35 norm#:=2/3reduced_il#;
38 set_horizontal_spacing;
39 right_edge# = 15/4norm#+2hair#;
41 set_char_box (left_space#, right_edge# + right_space#,
42 2 reduced_il#, 2 reduced_il#);
43 define_pixels (hair,norm,reduced_il, right_edge);
45 draw_block ((0,-d), (3/4norm+1/2hair,h));
46 draw_block ((3/4norm+2hair,-d),
52 z1l=(xoff+norm+hair,h);
53 penpos2(norm-3/2hair,180);
56 z3=(((right_edge -xoff)/2)+xoff,2hair);
59 z4=(xoff+1/2norm+1/2hair,reduced_il-hair);
64 penpos6(norm-hair,90);
72 p = z5l..z4l{up}..z4r{down}..z3r{right}..tension t..z2r{up}
73 ..tension t..z1r{left}..z1l{right}..tension t..z2l{down}
74 ..z3l{left}..z6r..z5r{down};
75 pickup pencircle scaled 1pt#;
76 filldraw p..(reverse p yscaled -1)..cycle;
77 penlabels (1,2,3,4,5,6);
79 % ugh, should be bulb, not flare?
80 draw_flare(z1l,180,90,hair,norm-1/2hair);
81 draw_flare(z7r,180,-90,hair,norm-1/2hair);
84 fet_beginchar ("C clef", "alto", "altoclef")
91 fet_beginchar ("C clef", "alto_change", "caltoclef")
99 % Inspired by Baerenreiter and Breitkopf
102 % FIXME: right vertical tangent seems to be lower than the F-line
103 % FIXME: bulb curve smoothly into "long curve" on the inside
106 % [Wanske] says that the extreme x point should be exactly between
107 % the dots, but her picture shows that the extreme is ~ 0.2 ss lower
109 def draw_bass_klef(expr exact_center, reduction) =
110 save reduced_il, left_tilt, left_thick, ball_to_right;
111 reduced_il# = interline# * reduction;
113 set_horizontal_spacing;
114 ball_to_right# = 2.1 reduced_il#;
115 set_char_box(left_space# +
116 - xpart exact_center,
118 xpart exact_center + ball_to_right#,
119 - ypart exact_center + 2.5 reduced_il#,
120 ypart exact_center +reduced_il#);
122 define_pixels(reduced_il, ball_to_right);
124 left_thick = .25 reduced_il;
126 x1r - x1l = left_thick;
127 z1l = (hround_pixels(xpart exact_center),
128 vround_pixels(ypart exact_center));
132 x3l - x1l = ball_to_right;
134 x3l - x3r = .48 reduced_il;
135 y3l = -0.05 interline;
136 x4 = x1l - stafflinethickness;
137 y4 = -2.2 reduced_il;
138 z5 = (x3l + 1/3 reduced_il, .5 reduced_il);
140 penpos1(whatever, left_tilt);
141 penpos2(1.2 stafflinethickness, -90);
142 penpos3(whatever, 185);
143 penpos4(stafflinethickness, 135);
145 draw_bulb(1, z1r, z1l, .45 reduced_il, 1.0);
148 fill z1r{up} .. z2r{right} .. tension 1.0 .. z3r{down} .. {curl 0}
149 simple_serif(z4r, z4l, 90) {curl 0}
150 .. z3l{up} .. tension 0.9 .. z2l{left}
151 .. z1l{dir (-90 + left_tilt)} -- cycle;
156 2 dot_diam = reduction* (interline - stafflinethickness);
157 pickup pencircle scaled dot_diam;
164 fet_beginchar("F clef ", "bass", "bassclef")
168 draw_bass_klef((.5 interline#, 0), 1.0);
170 fet_beginchar("F clef (reduced)", "bass_change", "cbassclef")
171 draw_bass_klef((.4 interline#, 0),0.8);
177 % Inspired by Baerenreiter
179 % FIXME top should be thinner at z8,
180 % FIXME bulb should curve (see bass clef)
181 % FIXME start (inside) should be little thinner
185 % Beste lezers, kijk,
187 % Een bolletje hebben we bij toeval allemaal wel eens getekend, maar begint u
188 % toch eenvoudig. Eerst een eenvoudig kruis of herstellingsteken
189 % en via de dubbelslag naar een voorzichtig vlaggetje, en heb geduld!
190 % Ikzelf heb bijvoorbeeld over mijn eerste gave G-sleutel
191 % 35 kilobyte metafont, 12 patchlevels, 0 vriendinnen en 45 dagen gedaan
193 def draw_gclef (expr exact_center, reduction)=
194 save reduced_il, downstroke_dir, downstroke_angle, hair, center;
195 save breapth_factor, inner_thick_end, thinness, thickness, thinnib;
196 save inner_start_angle, thinness, thinpen;
197 reduced_il# = interline# * reduction;
198 define_pixels(reduced_il);
199 pair downstroke_dir, center;
201 center := (hround_pixels(xpart exact_center),
202 vround_pixels(ypart exact_center));
204 hair = .3 stafflinethickness;
205 thinness = 1.3 stafflinethickness;
206 downstroke_dir = (14, -75);
207 breapth_factor = 11/7;
208 inner_thick_end = 45;
209 inner_start_angle = downstroke_angle - 43;
210 thickness = .4 reduced_il - hair;
212 thinnib = thinness - hair;
214 set_horizontal_spacing;
218 -xpart exact_center + 1.1 * breapth_factor* reduced_il#,
220 xpart exact_center + .66 breapth_factor* reduced_il#,
221 -ypart exact_center + 3 * reduced_il#,
222 ypart exact_center + 5 * reduced_il#);
224 pickup pencircle scaled hair;
225 downstroke_angle = angle downstroke_dir;
227 z1 = center + whatever * dir (inner_start_angle);
228 x1 = xpart center -.28 reduced_il;
230 top z2r = center + (0,reduced_il + stafflinethickness/2);
232 x4 = xpart center - .1 reduced_il;
233 bot y4r = -(reduced_il + .5 stafflinethickness);
235 z3 = (z4 - center) rotated inner_thick_end + center;
237 z5r = (- breapth_factor, .37)* reduced_il + center;
238 penpos5(thickness, 135);
240 z6 = center + whatever * downstroke_dir;
241 y6 = ypart center + 2 reduced_il;
243 z7l - z6 = whatever *(z5- z6) ;
244 y7l = 3.5 reduced_il;
245 z8r = .4 [z9r, z7r] + 1.5 stafflinethickness * dir 52;
248 top y9l = 5 reduced_il;
251 y11 = -11/7 reduced_il;
253 y12 = ypart center - 18.5/7 reduced_il;
254 x12 = x11 - 5 /7 reduced_il;
256 z13 = z12 + .6 reduced_il*(-1,1);
258 (z10r - z10l) dotprod (unitvector downstroke_dir rotated 90) =
261 center - z10= whatever * downstroke_dir;
262 center - z11 = whatever * downstroke_dir;
264 penpos1(thinnib, inner_start_angle);
265 penpos2(thickness, 90);
266 penpos3(thinnib, -90 + inner_thick_end);
267 penpos4(thinnib, -90);
270 penpos7(thickness, 135);
271 penpos8(1.5 thinnib, - 70 + angle downstroke_dir);
272 penpos9(1.5 thickness, -80);
273 penpos10(whatever, downstroke_angle + 10);
274 penpos11(thinnib, downstroke_angle + 90);
275 penpos12(thinnib, -90);
276 penpos13(3 thinnib, 180);
279 filldraw z2l{right} .. z3l.. z4l{left} .. z5l{up} .. z7l{up}
282 {downstroke_dir}z10l --- z11l -- z11r --- z10r{- downstroke_dir}
286 .. z7r{down} .. z5r{down} .. z4r{right}
287 .. z3r .. z2r{left} ..
290 .. tension 0.85 ..cycle;
292 filldraw simple_serif(z1r, z1l, 90) -- cycle;
294 filldraw z12r{left} .. z13r{up} -- z13l{down} .. z12l{right} .. cycle;
296 draw_bulb(-1, z13l, lft z13r, 6/14 reduced_il, 1.0);
298 pickup pencircle scaled (thinpen);
299 draw z10 --- z11 .. z12{left};
301 penlabels(range 1 thru 15);
305 fet_beginchar("G clef", "violin", "violinclef")
309 draw_gclef((1.7 interline#,0), 1.0);
311 fet_beginchar("G clef", "violin_change", "cviolinclef")
312 draw_gclef((1.3 interline#,0), .8);
315 fet_endgroup("clefs");