% feta-klef.mf -- implement Clefs -*-Fundamental-*- % % part of LilyPond's pretty-but-neat music font % % source file of the Feta (not the Font-En-Tja) music font % % (c) 1997--2005 Han-Wen Nienhuys , % Jan Nieuwenhuizen , % Juergen Reuter fet_begingroup ("clefs"); % % [Wanske] says the bulbs should be positioned about 1/4 right of the % `arrow'. % % TODO: The hair-curve at z6r looks a little awkward. % def draw_c_clef (expr reduction) = save hair, norm, reduced_ss, right_edge; save xoff; reduced_ss# = staff_space# * reduction; norm# := 2/3 reduced_ss#; hair# := 0.06 reduced_ss# + 0.5 linethickness#; right_edge# = 15/4 norm# + 2 hair#; define_pixels (norm, reduced_ss, right_edge); define_whole_vertical_blacker_pixels (hair); set_char_box (0, right_edge#, 2 reduced_ss#, 2 reduced_ss#); % make unreduced glyph fit exactly into five staff lines if reduction = 1: h := d := 2 staff_space_rounded; fi; % assure that the gap between the left and right stem % has the same number of pixels as the thickness of the right % stem draw_block ((0, -d + feta_shift), (3/4 norm + 1/2 hair, h)); draw_block ((3/4 norm + 1/2 hair + hround (3/2 hair), -d + feta_shift), (3/4 norm + 1/2 hair + 2 hround (3/2 hair), h)); % assure symmetry h := h - feta_shift; pickup feta_fillpen; xoff = 3/4 norm + 1/2 hair + 2 hround (3/2 hair); z5l = (xoff - 3/4 hair, 0); z5r = (x4, 0); penpos1 (hair - pen_top - pen_bot, -90); top z1l = (xoff + norm + hair, h); penpos2 (hround (norm - 3/2 hair) - pen_lft - pen_rt, 180); rt z2l = (w, h / 2); penpos3 (hair - pen_top - pen_bot, 90); bot z3l = ((right_edge - xoff) / 2 + xoff, vround (.5 norm - 1.5 hair)); penpos4 (hair - pen_lft - pen_rt, 0); top z4 = (xoff + 1/2 norm + 1/2 hair, vfloor (reduced_ss - linethickness - .2 hair)); bot z6 = (xoff + 3/4 norm, vround (.5 norm - .5 hair)); save t; t = 0.833; save pat; path pat; pat = z5l{curl 1} .. z4l{up} .. z4r{down} .. z3r{right} ..tension t.. z2r{up} ..tension t.. flare_path (top z1l, 180, 90, hair, hfloor (norm - 1/2 hair), -1) ..tension t.. z2l{down} .. z3l{left} .. z6 .. z5r{down}; filldraw pat shifted (0, feta_shift) -- reverse pat yscaled -1 shifted (0, -feta_eps) -- cycle; penlabels (1, 2, 3, 4, 5, 6); % ugh, should be bulb, not flare? draw_staff (-2, 2, 0); enddef; fet_beginchar ("C clef", "C"); draw_c_clef (1.0); fet_endchar; fet_beginchar ("C clef", "C_change"); draw_c_clef (.8); fet_endchar; % % New bulb routine: % % Insert a brushed piece of the path, and draw the rest of the bulb % separately. % % The bulb has circular form. Neat merging of the bulb and brushed path % is done by playing with tension. % def new_bulb (expr start_point, start_angle, outer_tangent_point, end_point, end_angle, big_radius, bulb_radius, flare, direction, turning_dir) = begingroup; save pat, before, after; save center; save u, v; path pat, before, after; pair center; clearxy; center = outer_tangent_point + big_radius * dir (0) % + (big_radius - bulb_radius) * dir (-turning_dir * 90) ; z1' = center + bulb_radius * dir (turning_dir * 180); z2' = outer_tangent_point + flare * dir (0); z3' = center + bulb_radius * dir (0); z4' = center + bulb_radius * dir (turning_dir * 90); z5' = center - 0.5 [big_radius, bulb_radius] * dir (turning_dir * 90); labels (1', 2', 3', 4', 5'); before := z3'{dir (turning_dir * 90)} .. z4'{-dir(0)} .. tension 1.1 .. z1'{-dir (turning_dir* 90)}; after := z2'{dir (turning_dir * 90)} .. tension 1.05 .. end_point{dir (end_angle)}; (u, v) = before intersectiontimes after; pat := start_point{dir (start_angle)} .. outer_tangent_point{dir (-turning_dir * 90)} .. tension 1.02 .. z5'{dir(0)} .. subpath (0, u) of before .. subpath (v, infinity) of after; if direction = 0: pat := reverse pat; fi pat endgroup enddef; % % There is some variation in the shape of bass clefs. % % * In some clefs the size of the swoosh tip almost reaches the % bottom staff line; in some it crosses the 2nd line from the bottom % with a small overshoot. % % The most popular design is where the X part of the tip is aligned % with the left bulb boundary, and the Y part ends on the 2nd % staffline exactly. This is what we do. % % * The diameter of the bulb is the width of the open space. % % * The vertical center of the bulb can be on or slightly above the % staff line. % % * The vertical position of the dots can be symmetrical around the % staffline, centered in the staff space. The Baerenreiter SCS has % the bottom dot raised by approximately 0.1 staff space. % % * Uncarefully set music may have overshoots at the top. We have none. % % * It is not exactly clear where the vertical tangent at the right % of the swoosh should be. % def draw_bass_clef (expr exact_center, reduction) = save reduced_ss, swoosh_width; save right_thickness, right_offset, tip_protude; save dot_diam, bulb_y_offset, bulb_flare; pair tip_protude; reduced_ss# = staff_space# * reduction; 2.2 dot_diam# = reduction * (staff_space# - stafflinethickness#); right_thickness# = 0.37 staff_space# + 1.2 linethickness#; swoosh_width# = 2.1 reduced_ss#; define_pixels (swoosh_width); define_whole_pixels (reduced_ss); define_whole_blacker_pixels (dot_diam, right_thickness); right_offset = 0.05 staff_space; bulb_y_offset := 0.075 staff_space; bulb_flare := 2.5 linethickness; % tip_protude := (-linethickness, -.2 staff_space); tip_protude := (0, 0); set_char_box (-xpart exact_center, xpart exact_center + swoosh_width# + 7/12 reduced_ss#, -ypart exact_center + 2.5 reduced_ss#, ypart exact_center + reduced_ss#); y1 = bulb_y_offset; x1 = 0; x2 = .5 [x1, x3]; x2l = x2r = x2; y2l := vround_pixels (reduced_ss# + 0.5 linethickness#); y2l - y2r = linethickness; x3l - x1 = swoosh_width; x3l - x3r = right_thickness; % optical correction: the top dot seems farther away if y3l = 0. y3l = right_offset; z4 = -(0, 2.0 reduced_ss) + tip_protude; penpos3 (whatever, 185); penpos4 (linethickness, 135); fill new_bulb (z2l, 180, z1, z2r, 0, 0.45 reduced_ss, 0.4 reduced_ss, bulb_flare, 1, 1) .. z3r{down} .. {curl 0}simple_serif (z4r, z4l, 90){curl 0} .. z3l{up} ..tension 0.9.. cycle; pickup pencircle scaled dot_diam; lft x5 = hround (x3l + 1/3 reduced_ss - dot_diam / 2); bot y5 = vfloor (.5 reduced_ss - dot_diam / 2); z6 = z5 yscaled -1; % for symmetry y5 := y5 + feta_shift; drawdot z5; drawdot z6; penlabels (1, 2, 3, 4, 5, 6); draw_staff (-3, 1, 0); enddef; fet_beginchar ("F clef ", "F"); draw_bass_clef ((0, 0), 1.0); fet_endchar; fet_beginchar ("F clef (reduced)", "F_change"); draw_bass_clef ((0, 0), 0.8); fet_endchar; % % Inspired by Baerenreiter % % % 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 % % -- vrij naar Van Kooten & De Bie % def debugfill = fill enddef; def draw_gclef (expr reduction) = save reduced_ss, downstroke_dir, downstroke_angle, center; save breapth_factor, inner_thick_end, thinness, thickness, thinnib; save start_angle, inner_start_angle, thinness; save upward_swoosh_angle, bot_angle; save pat; path pat; pair downstroke_dir, center; reduced_ss# = staff_space# * reduction; define_pixels (reduced_ss); thinness = 0.10 staff_space + 0.65 linethickness; downstroke_dir = unitvector (14, -75); downstroke_angle = angle downstroke_dir; bot_angle = -180; % downstroke_angle - 87 upward_swoosh_angle = 132; start_angle = -99; breapth_factor = 21.0 /14; inner_thick_end = 45; inner_start_angle = downstroke_angle - 43; thickness = .32 reduced_ss + 1.1 linethickness; thinnib = thinness; set_char_box (0, 1.71 * breapth_factor * reduced_ss#, 2.6 * reduced_ss#, 5 * reduced_ss#); center := (breapth_factor * reduced_ss, 0); z1 = center + whatever * dir (inner_start_angle); x1 = xpart center - .28 reduced_ss; penpos1 (thinnib, inner_start_angle); x2r = xpart center; y2r = vround_pixels (reduced_ss# + .5 stafflinethickness#); penpos2 (thickness, 90); z3 = (z4 - center) rotated inner_thick_end + center; penpos3 (thinnib, -90 + inner_thick_end); x4 = xpart center - .1 reduced_ss; y4r = -y2r + feta_shift; penpos4 (thinnib, -90); x5r = -breapth_factor * reduced_ss + xpart center; y5r = .37 reduced_ss + ypart center; penpos5 (thickness, upward_swoosh_angle); z6 = center + whatever * downstroke_dir; y6 = ypart center + 2 reduced_ss; % penpos6 is computed later z7l - z6 = whatever * (z5 - z6) ; y7l = 3.5 reduced_ss; penpos7 (thickness, upward_swoosh_angle); x9 = .7 [x10, x7r]; top y9l = 5 reduced_ss; penpos9 (1.45 thickness, -70); x11 - x13r = 1.5 reduced_ss + 0.5 thinnib; y11 = ypart center - 47/28 reduced_ss; y12 = ypart center - 71/28 reduced_ss; y13 = .48 [y12, y4r]; x12r = xpart (.45 [z13r, z11] + .75 reduced_ss * downstroke_dir); % z10 = center + whatever * dir (downstroke_angle - 1.5); x10 = x6 - 2 thinnib; y10 = ypart center + 3.5 reduced_ss; y10l - y10r = 1.2 thickness; z10r - z10l = .7 thinnib * dir (downstroke_angle + 90) + whatever * downstroke_dir; z10 = .5 [z10l, z10r]; z11 = center + whatever * downstroke_dir + (-0.05 reduced_ss, 0); penpos11 (thinnib, start_angle + 90); penpos12 (thinnib, bot_angle + 90); penpos13 (thinnib + 0.14 staff_space, 180); % this auxiliary point ensures good contour overlapping z8 = .5 [z9l, z9r] + .25 ((z9r - z9l) rotated -90); z20 = z9l - (0, .25 blot_diameter); penpos20(blot_diameter, 0); fill z2l{right} .. z3l .. z4l{left} .. tension 1.07 % inside curve .. z5l{up} .. z7l{up} .. tension 1.2 .. z20r & simple_serif (z20r,z20l, 60) -- z8 -- z9r % {dir (downstroke_angle + 0)} ..tension 0.8.. z7r{down} .. z5r{down} .. z4r{right} .. z3r .. z2r{left} ..tension .95.. z1r -- simple_serif (z1r, z1l, 80) -- z1l ..tension 0.85.. cycle; pat := z10{down} .. z6 .. tension 1.02 .. z11{dir (start_angle)}; penpos6 (thinnib, angle (direction 1 of pat) + 90); % two auxiliary points to simulate `draw' with `penstroke' z10' = point 0.5 of pat; penpos10' (thinnib, angle (direction 0.5 of pat) + 90); z11' = point 1.5 of pat; penpos11' (thinnib, angle (direction 1.5 of pat) + 90); z21l = z20l; z21r = z9r; penstroke z21e .. z10e{down} .. z10'e .. z6e .. z11'e .. z11e{dir (-95)} .. z12e{dir (bot_angle)}; fill new_bulb (z12r, bot_angle, z13r, z12l, bot_angle + 180, 0.45 reduced_ss, 0.38 reduced_ss, thinnib + .075 staff_space, 1, -1) -- cycle; penlabels (range 1 thru 20); penlabels (10', 11'); draw_staff (-1, 3, 0); enddef; fet_beginchar ("G clef", "G"); draw_gclef (1.0); fet_endchar; fet_beginchar ("G clef", "G_change"); draw_gclef (0.8); fet_endchar; %%%% % % PERCUSSION % % % The percussion clef extent is not coincident with its bbox, since % the percussion clef needs more space in front than a normal clef. % def draw_percussion_clef (expr reduction) = save reduced_ss, razt; reduced_ss# = staff_space# * reduction; define_pixels (reduced_ss); set_char_box (-.67 reduced_ss#, 2.0 reduced_ss#, reduced_ss#, reduced_ss#); razt := hround (0.45 reduced_ss); d := d - feta_shift; draw_block ((-b, -d), (-b + razt, h)); draw_block ((w - razt, -d), (w, h)); draw_staff (-3, 1, 1); enddef; fet_beginchar ("percussion clef", "percussion"); draw_percussion_clef (1.0); fet_endchar; fet_beginchar ("percussion clef (reduced)", "percussion_change"); draw_percussion_clef (.8); fet_endchar; def draw_tab_T (expr pos, siz, slant) = begingroup; save vx, vy; pair vx, vy; clearxy; vx = (xpart siz) * dir 0; vy = (ypart siz) * dir 90; penpos1 (.75 penh, 100); z1 = z2 + (1/6 * vx - .15 * vy); penpos2 (hround (.9 penw), 0); x2l = hround xpart (pos + .75 vy); y2l = ypart (pos + .75 vy); penpos3 (penh, -100); z3l = pos + .4 vx + vy; penpos4 (penh, -90); z4 = -.1 vy + .5 [z3, z5]; penpos5 (.8 penh, -30); x5r = xpart (pos + siz); y5l = ypart (pos + siz); penpos10 (penw, 170); z10 = pos + .55 vx + .9 vy; penpos11 (.75 [penh, penw], 170); z11 = z10 - .5 vy + .025 vx; penpos12 (penh, 100); z12l = (xpart .5 [z13, z11], ypart (pos - .025 * siz)); penpos13 (.75 penh, 60); z13 = pos + .2 vx + .15 vy; % penlabels (range 1 thru 13); soft_penstroke (z1e ..tension 1.1.. z2e .. z3e{right} ..tension 1.5.. z4e ..z5e) slanted slant shifted (slant * -ypart pos, 0); soft_end_penstroke (z10e ..tension 1.5.. z11e .. z12e ..tension 1.1.. z13e{(z13r - z13l) rotated 90}) slanted slant shifted (slant * -ypart pos, 0); endgroup; enddef; def draw_tab_A (expr pos, siz, slant) = begingroup; save vx, vy, pat; pair vx, vy; path pat; clearxy; vx = (xpart siz) * dir 0; vy = (ypart siz) * dir 90; penpos1 (.75 penh, -110); z1r = pos + .07 vy; penpos2 (penh, -75); z2r = (.5 [x1, x3], ypart pos); penpos3 (.25 [penh, penw], -30); z3 = (.45 [x2, x4], .15 [y2, y4]); penpos4 (1 [penh, penw], 0); z4 = pos + .5 vx + .975 vy; penpos5 (1 [penh, penw], -180); z5 = z4; penpos6 (.2 [penh, penw], -150); z6l = (.8 [x5l, x7l], .9 [y5l, y7l]); penpos7 (penh,-90); z7r = (.5 [x6, x8], ypart pos); penpos8 (.75 penh, -70); z8r = (xpart (pos + siz), y7r + .075 ypart (siz)); pat := z2 .. z3 .. z4; penpos10 (penh, angle (direction 1.2 of pat) - 180); z10 = point 1.2 of pat; penpos11 (.9 penh, -90); z11 = .4 [z10, z6] - 0.05 vy; penpos12 (.75 penh, -75); z12 = .3 [z11, z6] + 0.02 vy; % penlabels (range 1 thru 12); soft_penstroke (z1e{(z1r - z1l) rotated 90} .. z2e .. z3e .. z4e) slanted slant shifted (slant * -ypart pos, 0); soft_end_penstroke (z5e .. z6e .. z7e .. z8e{(z8r - z8l) rotated 90}) slanted slant shifted (slant * -ypart pos, 0); soft_end_penstroke (z10e .. z11e .. z12e) slanted slant shifted (slant * -ypart pos, 0); endgroup; enddef; def draw_tab_B (expr pos, siz, slant) = begingroup; save vx, vy; pair vx, vy; clearxy; vx = (xpart siz) * dir 0; vy = (ypart siz) * dir 90; penpos1 (.75 penh, 100); z1 = z2 + (.15 * vx - .1 * vy); penpos2 (hround (.9 penw), 0); x2l = hround xpart (pos + .75 vy); y2l = ypart (pos + .75 vy); penpos3 (penh, -100); z3l = pos + .4 vx + 1.05 vy; penpos4 (.8 [penh, penw], -180); z4 = (xpart (pos + .75 siz), .5 [y3, y5]); penpos5 (.8 penh, 90); z5 = (.5 [x10, x4], ypart (pos + .55 siz)); penpos6 (.8 penh, 270); z6 = z5; penpos7 (penw, 180); z7l = (xpart (pos + siz), .5 [y6, y8]); penpos8 (.8 penh, 45); z8 = .5 [z12l, z11l] + .15 vx - .05 vy; penpos10 (.75 [penh, penw], 170); z10 = pos + .375 vx + vy; penpos 11 (.8 [penh, penw], 150); z11 = z10 - .5 vy + .04 vx; penpos12 (penh, 100); z12l = (xpart .5 [z13, z11], ypart pos); penpos13 (.75 penh, 60); z13 = pos + .1 vx + .15 vy; % penlabels (range 1 thru 13); soft_penstroke (z1e ..tension 1.1.. z2e .. z3e .. z4e ..z5e {left}) slanted slant shifted (slant * -ypart pos, 0); soft_end_penstroke (z6e{right} .. z7e .. z8e{(z8r - z8l) rotated 90}) slanted slant shifted (slant * -ypart pos, 0); soft_end_penstroke (z10e ..tension 1.5.. z11e .. z12e ..tension 1.1.. z13e{(z13r - z13l) rotated 90}) slanted slant shifted (slant * -ypart pos, 0); endgroup; enddef; def draw_tab_clef (expr reduction) = save reduced_ss, letterheight, penw, penh; reduced_ss# = staff_space# * reduction; letterheight# = 1.8 reduced_ss#; define_pixels (reduced_ss, letterheight); set_char_box (-.2 reduced_ss#, 2.8 reduced_ss#, 1.6 letterheight#, 1.6 letterheight#); penw = .45 reduced_ss; penh = .2 reduced_ss; draw_tab_T ((-b + .15 reduced_ss, h - letterheight), (2.1 reduced_ss, letterheight), 0.2); draw_tab_A ((-b - .05 reduced_ss, -.5 letterheight +.15 reduced_ss), (2.2 reduced_ss, letterheight), 0.4); draw_tab_B ((-b + .025 reduced_ss, -d), (2.1 reduced_ss, letterheight), 0.25); draw_staff (-3, 2, 0.5); enddef; fet_beginchar ("tab clef", "tab"); draw_tab_clef (1.0); fet_endchar; fet_beginchar ("tab clef (reduced)", "tab_change"); draw_tab_clef (.8); fet_endchar; fet_endgroup ("clefs");