6 proofrulethickness 1pt#;
7 makegrid(0pt,0pt for i:=-5pt step 1pt until 5pt: ,i endfor)
8 (0pt,0pt for i:=-5pt step 1pt until 5pt: ,i endfor);
9 proofrulethickness .1pt#;
10 makegrid(0pt,0pt for i:=-4.8pt step .2pt until 4.8pt: ,i endfor)
11 (0pt,0pt for i:=-4.8pt step .2pt until 4.8pt: ,i endfor);
16 tracingequations := tracingonline := 1;
20 def draw_staff(expr first, last, offset)=
21 pickup pencircle scaled stafflinethickness;
22 for i:= first step 1 until last:
23 draw (- staff_space, (i + offset) * staff_space) .. (4 staff_space,( i+ offset)* staff_space);
32 def scaledabout(expr point, scale) =
33 shifted -point scaled scale shifted point
38 % make a local (restored after endgroup) copy of t_var
40 def local_copy(text type, t_var)=
51 % Urgh! Want to do parametric types
54 def del_picture_stack=
55 save save_picture_stack, picture_stack_idx;
58 % better versions of Taupin/Egler savepic cmds
61 def make_picture_stack =
62 % override previous stack.
64 picture save_picture_stack[];
65 numeric picture_stack_idx;
66 picture_stack_idx := 0;
67 def push_picture(expr p) =
68 save_picture_stack[picture_stack_idx] := p ;
69 picture_stack_idx := picture_stack_idx + 1;
71 def pop_picture = save_picture_stack[decr picture_stack_idx] enddef;
72 def top_picture = save_picture_stack[picture_stack_idx] enddef;
77 % why can't I delete individual pens?
81 numeric pen_stack_idx;
83 def push_pen(expr p) =
84 save_pen_stack[pen_stack_idx] := p ;
85 pen_stack_idx := pen_stack_idx +1;
87 def pop_pen = save_pen_stack[decr pen_stack_idx] enddef;
88 def top_pen = save_pen_stack[pen_stack_idx] enddef;
91 save save_pen_stack, pen_stack_idx;
98 def simple_serif(expr p,q, a)=
99 p{dir(angle(q-p) -a)} .. q{ - dir(angle(p -q) + a)}
105 % err_x: drift of y axis at top
106 % err_y: drift of x axis at right
107 def distorted_ellipse(expr a,b,err_y,err_x,super) =
108 superellipse((a,err_x),(-err_y,b),(-a,-err_x),(err_y,-b),super);
111 % stolen from feta-eindelijk, but still
113 def draw_block (expr bottom_left, top_right) =
114 pickup pencircle scaled blot_diameter;
118 bot y1 = ypart bottom_left;
119 top y2 = ypart top_right;
123 rt x1 = xpart top_right;
125 lft x3 = xpart bottom_left;
128 filldraw z1--z2--z3--z4--cycle;
132 def draw_brush(expr a,w,b,v) =
135 penpos3(w,angle(z2-z1)+90);
136 penpos4(w,angle(z2-z1));
137 penpos5(v,angle(z1-z2)+90);
138 penpos6(v,angle(z1-z2));
142 fill z3r{z3r-z5l}..z4l..{z5r-z3l}z3l..z5r{z5r-z3l}..z6l..{z3r-z5l}z5l..cycle;
145 def draw_flare(expr pos,alpha,beta,line,flare) =
148 penpos1(line,180+beta+alpha);
150 penpos2(flare,180+beta+alpha);
152 penpos3(flare,0+alpha);
153 z3l=z1r+(1/2+0.43)*flare*dir(alpha+beta);
154 z4=z2r-line*dir(alpha);
158 fill z1r{dir(alpha)}..z3r{dir(180+alpha-beta)}..z2l{dir(alpha+180)}
159 ..z3l{dir(180+alpha+beta)}..tension t
160 ..z4{dir(180+alpha+beta)}..z1l{dir(alpha+180)}..cycle;
164 def brush(expr a,w,b,v) =
172 % Draw a (rest) crook, starting at thickness STEM in point A,
173 % ending a ball W to the left, diameter BALLDIAM
174 % ypart of the center of the ball is BALLDIAM/4 lower than ypart A
176 def balled_crook(expr a, w, balldiam, stem) =
179 penpos1(balldiam/2,-90);
180 penpos2(balldiam/2,0);
181 penpos3(balldiam/2,90);
182 penpos4(balldiam/2,180);
183 x4r=xpart a-w; y3r=ypart a+balldiam/4;
187 x5=x4r+9/8balldiam; y5r=y1r;
189 x6l=xpart a; y6l=ypart a;
190 penstroke z1e..z2e..z3e..z4e..z1e..z5e{right}..z6e;
191 penlabels(1,2,3,4,5,6);
196 currentpicture := currentpicture yscaled -1;
197 set_char_box(charbp, charwd, charht, chardp);
202 currentpicture := currentpicture scaled -1;
203 set_char_box(charwd, charbp, charht, chardp);
208 % center_factor: typically .5, the larger, the larger the radius of the bulb
209 % radius factor: how much the bulb curves inward
211 def draw_bulb(expr turndir, zl, zr, bulb_rad, radius_factor)=
218 % don't get near infinity
219 %z0 = zr + bulb_rad * (zl-zr)/length(zr -zl);
220 z0 = zr + bulb_rad /length(zr -zl) * (zl-zr);
224 z1 = z0 + radius_factor* rad * dir(ang + turndir* 100);
225 z2 = z0 + rad * dir(ang + turndir*300);
227 fill zr{dir (ang + turndir* 90)} .. z1 .. z2 -- cycle;