2 % feta-macros.mf -- auxiliary macros for both feta and parmesan fonts
4 % source file of the GNU LilyPond music typesetter
6 % (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
13 def print_penpos (suffix $) =
15 "z" & str$ & "l = (" & decimal x.$.l & ", " &decimal y.$.l & ");"
16 & " z" & str$ & "r = (" & decimal x.$.r & ", " & decimal y.$.r & ");";
22 proofrulethickness 1pt#;
25 (0pt, 0pt for i := -5pt step 1pt until 5pt: , i endfor)
26 (0pt, 0pt for i := -5pt step 1pt until 5pt: , i endfor);
28 proofrulethickness .1pt#;
31 (0pt, 0pt for i := -4.8pt step .2pt until 4.8pt: , i endfor)
32 (0pt, 0pt for i := -4.8pt step .2pt until 4.8pt: , i endfor);
38 tracingequations := tracingonline := 1;
42 def draw_staff (expr first, last, offset) =
44 pickup pencircle scaled stafflinethickness;
46 for i := first step 1 until last:
48 (i + offset) * staff_space_rounded)
50 (i + offset) * staff_space_rounded);
57 % Draw the outline of the stafflines. For fine tuning.
60 def draw_staff_outline (expr first, last, offset) =
65 pickup pencircle scaled 2;
67 for i := first step 1 until last:
69 (i + offset) * staff_space_rounded)
71 (i + offset) * staff_space_rounded);
73 draw p shifted (0, .5 stafflinethickness);
74 draw p shifted (0, -.5 stafflinethickness);
84 def scaledabout (expr point, scale) =
85 shifted -point scaled scale shifted point
90 % make a local (restored after endgroup) copy of t_var
93 def local_copy (text type, t_var) =
104 % Urgh! Want to do parametric types
107 def del_picture_stack =
108 save save_picture_stack, picture_stack_idx;
113 % better versions of Taupin/Egler savepic cmds
116 def make_picture_stack =
117 % override previous stack
119 picture save_picture_stack[];
120 numeric picture_stack_idx;
121 picture_stack_idx := 0;
123 def push_picture (expr p) =
124 save_picture_stack[picture_stack_idx] := p;
125 picture_stack_idx := picture_stack_idx + 1;
128 def pop_picture = save_picture_stack[decr picture_stack_idx] enddef;
129 def top_picture = save_picture_stack[picture_stack_idx] enddef;
135 % why can't I delete individual pens?
140 pen save_pen_stack[];
141 numeric pen_stack_idx;
143 def push_pen (expr p) =
144 save_pen_stack[pen_stack_idx] := p;
145 pen_stack_idx := pen_stack_idx + 1;
147 def pop_pen = save_pen_stack[decr pen_stack_idx] enddef;
148 def top_pen = save_pen_stack[pen_stack_idx] enddef;
153 save save_pen_stack, pen_stack_idx;
161 def soft_penstroke text t =
162 forsuffixes e = l, r:
170 ..tension1.5.. reverse path_.r
171 ..tension1.5.. cycle;
176 def soft_start_penstroke text t =
177 forsuffixes e = l, r:
186 ..tension1.5.. cycle;
191 def soft_end_penstroke text t =
192 forsuffixes e = l, r:
200 ..tension1.5.. reverse path_.r
207 % Make a round path segment going from P to Q. 2*A is the angle that the
211 def simple_serif (expr p, q, a) =
212 p{dir (angle (q - p) - a)}
213 .. q{-dir (angle (p - q) + a)}
218 % Draw an axis aligned block making sure that edges are on pixels.
221 def draw_rounded_block (expr bottom_left, top_right, roundness) =
226 % Originally, there was `floor' instead of `round', but this is
227 % not correct because pens use `round' also.
228 size = round min (roundness,
229 xpart (top_right - bottom_left),
230 ypart (top_right - bottom_left));
232 z2 + (size / 2, size / 2) = top_right;
233 z4 - (size / 2, size / 2) = bottom_left;
239 pickup pencircle scaled size;
254 def draw_block (expr bottom_left, top_right) =
255 draw_rounded_block (bottom_left, top_right, blot_diameter);
259 def draw_square_block (expr bottom_left, top_right) =
262 x1 = xpart bottom_left;
263 y1 = ypart bottom_left;
264 x2 = xpart top_right;
265 y2 = ypart top_right;
275 def draw_gridline (expr bottom_left, top_right, thickness) =
276 draw_rounded_block (bottom_left - (thickness / 2, thickness / 2),
277 top_right + (thickness / 2, thickness / 2),
282 def draw_brush (expr a, w, b, v) =
290 penpos3 (w, angle (z2 - z1) + 90);
291 penpos4 (w, angle (z2 - z1));
292 penpos5 (v, angle (z1 - z2) + 90);
293 penpos6 (v, angle (z1 - z2));
306 % Make a superellipsoid segment going from FROM to TO, with SUPERNESS.
307 % Take superness = sqrt(2)/2 to get a circle segment.
309 % See Knuth, p. 267 and p.126.
311 def super_curvelet (expr from, to, superness, dir) =
313 (superness [xpart to, xpart from],
314 superness [ypart from, ypart to]){to - from}
316 (superness [xpart from, xpart to],
317 superness [ypart to, ypart from]){to - from}
323 % Bulb with smooth inside curve.
325 % alpha = start direction
326 % beta = which side to turn to
327 % flare = diameter of the bulb
328 % line = diameter of line attachment
329 % direction = is ink on left or right side (1 or -1)
331 % Note that `currentpen' must be set correctly -- only circular pens
332 % are supported properly.
334 def flare_path (expr pos, alpha, beta, line, flare, direction) =
338 thick = pen_top + pen_bot;
342 penpos1' (line - thick, 180 + beta + alpha);
345 penpos2' (flare - thick, 180 + beta + alpha);
348 penpos3' (flare - thick, 0 + alpha);
349 rt x3'l = hround (x1'r
350 + (1/2 + 0.43) * flare * xpart dir (alpha + beta));
351 bot y2'l = vround (y1'r
352 + (1 + 0.43) * flare * ypart dir (alpha + beta));
354 rt x4' = x2'r - line * xpart dir (alpha);
355 y4' = y2'r - line * ypart dir (alpha);
357 penlabels (1', 2', 3', 4');
363 p := z1'r{dir (alpha)}
364 .. z3'r{dir (180 + alpha - beta)}
365 .. z2'l{dir (alpha + 180)}
366 .. z3'l{dir (180 + alpha + beta)}
367 ..tension t.. z4'{dir (180 + alpha + beta)}
368 .. z1'l{dir (alpha + 180)};
379 def brush (expr a, w, b, v) =
381 draw_brush (a, w, b, v);
382 penlabels (3, 4, 5, 6);
388 % Draw a (rest) crook, starting at thickness STEM in point A,
389 % ending a ball W to the left, diameter BALLDIAM.
390 % ypart of the center of the ball is BALLDIAM/4 lower than ypart A.
393 def balled_crook (expr a, w, balldiam, stem) =
397 penpos1 (balldiam / 2, -90);
398 penpos2 (balldiam / 2, 0);
399 penpos3 (balldiam / 2, 90);
400 penpos4 (balldiam / 2, 180);
403 y3r = ypart a + balldiam / 4;
404 x1l = x2l = x3l = x4l;
405 y1l = y2l = y3l = y4l;
408 x5 = x4r + 9/8 balldiam;
423 penlabels (1, 2, 3, 4, 5, 6);
429 currentpicture := currentpicture yscaled -1;
431 set_char_box (charbp, charwd, charht, chardp);
436 currentpicture := currentpicture scaled -1;
438 set_char_box (charwd, charbp, charht, chardp);
443 % center_factor: typically .5; the larger, the larger the radius of the bulb
444 % radius factor: how much the bulb curves inward
447 def draw_bulb (expr turndir, zl, zr, bulb_rad, radius_factor)=
454 ang = angle (zr - zl);
456 % don't get near infinity
457 % z0 = zr + bulb_rad * (zl - zr) / length (zr - zl);
458 z0' = zr + bulb_rad / length (zr - zl) * (zl - zr);
462 z1' = z0' + radius_factor * rad * dir (ang + turndir * 100);
463 z2' = z0' + rad * dir (ang + turndir * 300);
467 pat = zr{dir (ang + turndir * 90)}
472 % avoid grazing outlines
473 fill subpath (0, 2.5) of pat
483 % To get symmetry at low resolutions we need to shift some points and
484 % paths, but not if mf2pt1 is used.
488 vardef hfloor primary x = x enddef;
489 vardef vfloor primary y = y enddef;
490 vardef hceiling primary x = x enddef;
491 vardef vceiling primary y = y enddef;
493 vardef hfloor primary x = floor x enddef;
494 vardef vfloor primary y = (floor y.o_)_o_ enddef;
495 vardef hceiling primary x = ceiling x enddef;
496 vardef vceiling primary y = (ceiling y.o_)_o_ enddef;