+ save crook_thinness, crook_fatness;
+ save bottom_overshoot, bot_crook_dir;
+ save top_stem_thick, bottom_stem_thick, hair, smaller_hole;
+ save top_crook_thinness;
+ save zwiep;
+ save center;
+ pair center, bot_crook_dir;
+ save clearing, wid;
+ save pat;
+ path pat;
+
+ clearxy;
+
+ wid = w / 2;
+
+ % the stem shouldn't reach the top staff line.
+ %% TODO: should take from height.
+ %
+ % TODO: parameterize this
+ %
+ if wid >= 0.75 staff_space:
+ smaller_hole = 0.35 stafflinethickness;
+ else:
+ smaller_hole = 0;
+ fi;
+ clearing = 1.7 stafflinethickness;
+ crook_thinness = .7 stafflinethickness + .06 staff_space;
+ crook_fatness = 0.31 staff_space;
+ top_crook_thinness = 1 stafflinethickness + .065 staff_space;
+ bottom_overshoot = stafflinethickness;
+
+ bottom_stem_thick# = 0.06 staff_space# + 0.6 stafflinethickness#;
+ top_stem_thick# = 0.1 staff_space# + 1.2 stafflinethickness#;
+ define_whole_blacker_pixels (bottom_stem_thick, top_stem_thick);
+
+ if odd (top_stem_thick - bottom_stem_thick):
+ top_stem_thick := top_stem_thick - 1;
+ fi;
+
+ center = (0, 0);
+
+ x1l = hround (-.5 top_stem_thick);
+ y1 = vround (2 staff_space - clearing);
+ x2l = hround (-.5 bottom_stem_thick);
+ y2 = -.5 staff_space - .5 stafflinethickness;
+
+ penpos1 (top_stem_thick, 0);
+ penpos2 (bottom_stem_thick, 0);
+
+ y3l = vfloor ((staff_space - stafflinethickness) / 2);
+ z3l = whatever [z2r, z1r];
+ z3r = .3 [z2r, z1r] + (smaller_hole, 0);
+ x3r := hceiling x3r;
+
+ z10 = whatever [z2r, z1r] + (smaller_hole, 0);
+ y10 = -1/10 staff_space;
+ x10 := hceiling x10;
+
+ x11 = bottom_overshoot / 3;
+ y11 = -vround (.5 (staff_space + stafflinethickness)
+ + bottom_overshoot);
+
+ penpos4 (whatever, 53);
+
+ y4l - y4r = top_crook_thinness;
+ y5r = .15 staff_space;
+ x5l = hround (wid);
+ y4 = staff_space / 2;
+ x4r = .45 [x5r, x3r];
+ y4l := vround y4l;
+
+ penpos5 (crook_fatness, -175);
+
+ bot_crook_dir = unitvector ((x5l, 0) - z11);
+ z8 = z11 + whatever * bot_crook_dir;
+ y8 = -staff_space / 2;
+
+ z7 = z8
+ + whatever * bot_crook_dir
+ + crook_thinness * (bot_crook_dir rotated 90);
+ x7 = .1 [x3r, x8];
+
+ pat := z3r{z3r - z10}
+ .. z4r{right}
+ .. z5r{down}
+ .. z7{-bot_crook_dir}
+ & z7
+ .. z10{z3r - z10}
+ -- cycle;
+ unfill pat;
+ unfill pat xscaled -1;
+
+ pat := z11{right}
+ .. z8{bot_crook_dir}
+ .. z5l{up}
+ .. z4l{left}
+ .. z3l;
+ fill pat
+ -- simple_serif (z1r, z1l, 30)
+ -- reverse pat xscaled -1 shifted (-feta_eps, 0)
+ -- cycle;
+
+ currentpicture := currentpicture shifted (w/2, 0);