% % feta-klef.mf -- implement Clefs % % source file of the Feta (Font-En-Tja) music font % % (c) 1997 Han-Wen Nienhuys % fet_begingroup("klef"); def draw_staff(expr first, last)= pickup pencircle scaled stafflinethickness; for i:= first step 1 until last: draw (- interline, i* interline) .. (4 interline, i* interline); endfor enddef; % % Inspired by Baerenreiter and Breitkopf % % FIXME: dims % FIXME: right vertical tangent seems to be lower than the F-line % FIXME: bulb curve smoothly into "long curve" on the inside % % % [Wanske] says that the extreme x point should be exactly between % the dots, but her picture shows that the extreme is ~ 0.2 ss lower def draw_bass_klef(expr exact_center, reduction) = save reduced_il, left_tilt, left_thick; reduced_il# = interline# * reduction; left_tilt = 5; define_pixels(reduced_il); left_thick = .25 reduced_il; set_char_box( - xpart exact_center+ .2 reduced_il#, xpart exact_center + 2.7 reduced_il#, - ypart exact_center + 2.5 reduced_il#, ypart exact_center +reduced_il#); x1r - x1l = left_thick; z1l = (hround_pixels(xpart exact_center), vround_pixels(ypart exact_center)); y2 = reduced_il; x3l - x1l = 2.1 reduced_il; x2 = .5 [x1,x3]; x3l - x3r = .48 reduced_il; y3l = -0.05 interline; x4 = x1l - stafflinethickness; y4 = -2.2 reduced_il; z5 = (x3l + 1/3 reduced_il, .5 reduced_il); penpos1(whatever, left_tilt); penpos2(1.2 stafflinethickness, -90); penpos3(whatever, 185); penpos4(stafflinethickness, 135); draw_bulb(1, z1r, z1l, .45 reduced_il, 1.0); fill z1r{up} .. z2r{right} .. tension 1.0 .. z3r{down} .. {curl 0} simple_serif(z4r, z4l, 90) {curl 0} .. z3l{up} .. tension 0.9 .. z2l{left} .. z1l{dir (-90 + left_tilt)} -- cycle; labels(2,4); penlabels(1,2,3,4); pickup pencircle scaled (.35 reduced_il); draw z5; draw z5 yscaled -1; enddef; fet_beginchar("F clef ", "bass", "bassclef") if test = 1: draw_staff(-3,1); fi; draw_bass_klef((.5 interline#, 0), 1.0); fet_endchar; fet_beginchar("F clef (reduced)", "bass_change", "cbassclef") draw_bass_klef((.4 interline#, 0),0.8); fet_endchar; % % Inspired by Baerenreiter % % FIXME top should be thinner at z8, % FIXME bulb should curve (see bass clef) % FIXME start (inside) should be little thinner % FIXME parametrise. % FIXME should be a bit more upright % % Beste lezers, kijk, % % Een bolletje hebben we bij toeval allemaal wel eens getekend, maar begint u % toch eenvoudig. Eerst een eenvoudig kruis of herstellingsteken % en via de dubbelslag naar een voorzichtig vlaggetje, en heb geduld! % Ikzelf heb bijvoorbeeld over mijn eerste gave G-sleutel % 35 kilobyte metafont, 12 patchlevels, 0 vriendinnen en 45 dagen gedaan % def draw_gclef (expr exact_center, reduction)= save reduced_il, downstroke_dir, downstroke_angle, hair, center; save breapth_factor, inner_thick_end, thinness, thickness, thinnib; save inner_start_angle, thinness, thinpen; reduced_il# = interline# * reduction; define_pixels(reduced_il); pair downstroke_dir, center; center := (hround_pixels(xpart exact_center), vround_pixels(ypart exact_center)); hair = .3 stafflinethickness; thinness = 1.3 stafflinethickness; downstroke_dir = (14, -75); breapth_factor = 11/7; inner_thick_end = 45; inner_start_angle = angle(-1,-2); thickness = .4 reduced_il - hair; thinnib = thinness - hair; thinpen = thinness; set_char_box(-xpart exact_center + breapth_factor* reduced_il#, xpart exact_center + .66 breapth_factor* reduced_il#, -ypart exact_center + 3 * reduced_il#, ypart exact_center + 5 * reduced_il#); pickup pencircle scaled hair; downstroke_angle = angle downstroke_dir; z1 = center + whatever * dir inner_start_angle; x1 = xpart center -.28 reduced_il; top z2r = center + (0,reduced_il + stafflinethickness/2); x4 = xpart center - .1 reduced_il; bot y4r = -(reduced_il + .5 stafflinethickness); z3 = (z4 - center) rotated inner_thick_end + center; z5r = (- breapth_factor, .37)* reduced_il + center; penpos5(thickness, 135); z6 = center + whatever * downstroke_dir; y6 = ypart center + 2 reduced_il; z7l - z6 = whatever *(z5- z6) ; y7l = 3.5 reduced_il; z8r = .4 [z9r, z7r] + 1.5 stafflinethickness * dir 52; x9 = .7 [x10, x7r]; top y9l = 5 reduced_il; y10 = 3. reduced_il; y11 = -11/7 reduced_il; y12 = ypart center - 18.5/7 reduced_il; x12 = x11 - 5 /7 reduced_il; z13 = z12 + .6 reduced_il*(-1,1); (z10r - z10l) dotprod (unitvector downstroke_dir rotated 90) = thinnib; center - z10= whatever * downstroke_dir; center - z11 = whatever * downstroke_dir; penpos1(thinnib, inner_start_angle); penpos2(thickness, 90); penpos3(thinnib, -90 + inner_thick_end); penpos4(thinnib, -90); penpos7(thickness, 135); penpos8(1.5 thinnib, - 70 + angle downstroke_dir); penpos9(1.5 thickness, -80); penpos10(whatever, downstroke_angle + 10); penpos11(thinnib, downstroke_angle + 90); penpos12(thinnib, -90); penpos13(3 thinnib, 180); filldraw z2l{right} .. z3l.. z4l{left} .. z5l{up} .. z7l{up} %.. z8l .. z9l & z9l .. {downstroke_dir}z10l --- z11l -- z11r --- z10r{- downstroke_dir} .. tension .8 .. z9r & z9r %.. z8r .. z7r{down} .. z5r{down} .. z4r{right} .. z3r .. z2r{left} .. tension .95 .. z1r -- z1l .. tension 0.85 ..cycle; filldraw simple_serif(z1r, z1l, 90) -- cycle; filldraw z12r{left} .. z13r{up} -- z13l{down} .. z12l{right} .. cycle; draw_bulb(-1, z13l, lft z13r, 6/14 reduced_il, 1.0); pickup pencircle scaled (thinpen); draw z10 --- z11 .. z12{left}; penlabels(range 1 thru 15); enddef; fet_beginchar("G clef", "violin", "violinclef") if test = 1: draw_staff(-1,3); fi; draw_gclef((1.6 interline#,0), 1.0); fet_endchar; fet_beginchar("G clef", "violin_change", "cviolinclef") draw_gclef((1.3 interline#,0), .8); fet_endchar; fet_endgroup("klef");