def draw_staff(expr first, last, offset)=
+if test <> 0:
pickup pencircle scaled stafflinethickness;
for i:= first step 1 until last:
draw (- staff_space, (i + offset) * staff_space) .. (4 staff_space,( i+ offset)* staff_space);
endfor
- enddef;
+fi;
+
+enddef;
+
+% draw the outline of the stafflines. For fine tuning.
+def draw_staff_outline(expr first, last, offset)=
+if test <> 0:
+ save p;
+ path p;
+ pickup pencircle scaled 2;
+ for i:= first step 1 until last:
+ p := (- staff_space, (i + offset) * staff_space) .. (4 staff_space,( i+ offset)* staff_space);
+
+ draw p shifted (0, .5 stafflinethickness);
+ draw p shifted (0, -.5 stafflinethickness);
+ endfor
+fi;
+enddef;
%
% Transforms
% drawing
%
-def simple_serif(expr p,q, a)=
- p{dir(angle(q-p) -a)} .. q{ - dir(angle(p -q) + a)}
+def soft_penstroke text t =
+ forsuffixes e = l,r: path_.e:=t; endfor
+ if cycle path_.l:
+ cyclestroke_
+ else:
+ fill path_.l .. tension1.5 .. reverse path_.r .. tension1.5 .. cycle
+ fi
enddef;
-%
-% a: x diameter
-% b: y diameter
-% err_x: drift of y axis at top
-% err_y: drift of x axis at right
-def distorted_ellipse(expr a,b,err_y,err_x,super) =
- superellipse((a,err_x),(-err_y,b),(-a,-err_x),(err_y,-b),super);
- enddef;
-% stolen from feta-eindelijk, but still
-% FIXME: too high
-def draw_block (expr bottom_left, top_right) =
- pickup pencircle scaled blot_diameter;
+%
+% make a round path segment going from P to Q. 2*A is the angle that the
+% path should take.
+%
- begingroup;
- save x,y;
- bot y1 = ypart bottom_left;
- top y2 = ypart top_right;
- y3 = y2;
- y4 = y1;
+def simple_serif(expr p,q, a)=
+ p{dir(angle(q-p) -a)} .. q{ - dir(angle(p -q) + a)}
+enddef;
+%
- rt x1 = xpart top_right;
- x2 = x1;
- lft x3 = xpart bottom_left;
- x4 = x3;
+%
+% draw an axis aligned block making sure that edges are on pixels.
+%
- filldraw z1--z2--z3--z4--cycle;
- endgroup;
- enddef;
+def draw_rounded_block (expr bottom_left, top_right, roundness) =
+ save round;
+ round = floor min(roundness,xpart (top_right-bottom_left),
+ ypart (top_right-bottom_left));
+
+
+ pickup pencircle scaled round;
+
+ begingroup;
+ save x,y;
+ z2+(round/2,round/2) = top_right;
+ z4-(round/2,round/2) = bottom_left;
+ y3 = y2;
+ y4 = y1;
+ x2 = x1;
+ x4 = x3;
+ fill bot z1 .. rt z1 --- rt z2 .. top z2 ---
+ top z3 .. lft z3 --- lft z4 .. bot z4 --- cycle;
+ endgroup;
+ enddef;
+
+
+
+ def draw_block (expr bottom_left, top_right) =
+ draw_rounded_block (bottom_left, top_right, blot_diameter);
+ enddef;
+
+ def draw_square_block (expr bottom_left, top_right) =
+ save x,y;
+ x1 = xpart bottom_left;
+ y1 = ypart bottom_left;
+ x2 = xpart top_right;
+ y2 = ypart top_right;
+
+
+ fill (x1,y1) --- (x2,y1) --- (x2,y2) --- (x1,y2) --- cycle;
+ enddef;
+
+
+ def draw_gridline (expr bottom_left,top_right,thickness) =
+ draw_rounded_block (bottom_left-(thickness/2,thickness/2),
+ top_right+(thickness/2,thickness/2),
+ thickness);
+ enddef;
+
def draw_brush(expr a,w,b,v) =
save x,y;
fill z3r{z3r-z5l}..z4l..{z5r-z3l}z3l..z5r{z5r-z3l}..z6l..{z3r-z5l}z5l..cycle;
enddef;
-def draw_flare(expr pos,alpha,beta,line,flare) =
+
+
+%
+% make a superellipsoid segment going from FROM to TO, with SUPERNESS.
+% Take superness = sqrt(2)/2 to get a circle segment
+%
+% see Knuth, p. 267 and p.126
+def super_curvelet(expr from, to, superness, dir) =
+ if dir = 1:
+ (superness [xpart to, xpart from], superness [ypart from,ypart to]){to - from}
+ else:
+ (superness [xpart from, xpart to], superness [ypart to,ypart from]){to - from}
+ fi
+enddef;
+
+
+%
+% Bulb with smooth inside curve.
+%
+% alpha = start direction.
+% beta = which side to turn to.
+% flare = diameter of the bulb
+% line = diameter of line attachment
+% direction = is ink on left or right side (1 or -1)
+%
+def flare_path(expr pos,alpha,beta,line,flare, direction) =
begingroup;
clearxy;
penpos1(line,180+beta+alpha);
penpos2(flare,180+beta+alpha);
z2=z3;
penpos3(flare,0+alpha);
- z3l=z1r+(1/2+0.43)*flare*dir(alpha+beta);
- z4=z2r-line*dir(alpha);
+ z3l=z1r+(1/2+0.43)*flare*dir(alpha+beta) ;
+ save taille;
+ taille = 0.0;
+ z4=z2r- line * dir(alpha);
penlabels(1,2,3,4);
pickup pencircle;
save t; t=0.833;
- fill z1r{dir(alpha)}..z3r{dir(180+alpha-beta)}..z2l{dir(alpha+180)}
+ save p;
+ path p;
+ p:=z1r{dir(alpha)}..z3r{dir(180+alpha-beta)}..z2l{dir(alpha+180)}
..z3l{dir(180+alpha+beta)}..tension t
- ..z4{dir(180+alpha+beta)}..z1l{dir(alpha+180)}..cycle;
- endgroup;
+ ..z4{dir(180+alpha+beta)}..z1l{dir(alpha+180)};
+
+ if direction = 1:
+ p
+ else:
+ reverse p
+ fi
+ endgroup
enddef;
+
+
def brush(expr a,w,b,v) =
begingroup;
draw_brush(a,w,b,v);
endgroup;
enddef;
+
def y_mirror_char =
currentpicture := currentpicture yscaled -1;
set_char_box(charbp, charwd, charht, chardp);
save rad, ang;
ang = angle(zr-zl);
- z0 = zr + bulb_rad * (zl-zr)/length(zr -zl);
+
+ % don't get near infinity
+ %z0 = zr + bulb_rad * (zl-zr)/length(zr -zl);
+ z0 = zr + bulb_rad /length(zr -zl) * (zl-zr);
+
rad = bulb_rad;
z1 = z0 + radius_factor* rad * dir(ang + turndir* 100);
endgroup
enddef;
+
+pi:=3.14159;
projects / lilypond.git / blobdiff