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% Croatian Wattle Patterns
% Circular wattle pattern, 1994, darko.zubrinic@etf.hr

mode_setup;
 font_size 10pt#;
 u#:=.8pt#; font_quad= 24u#;
            font_normal_space= 9u#;
            font_normal_stretch= 3u#;
            font_normal_shrink= 2u#;
 em#:=10pt#; cap#:=7pt#;
 thin#:=2/3pt#; thick#:=.9*5/6pt#;
 o#:=1/5pt#;
define_pixels(em,cap);
define_blacker_pixels(thin,thick);
curve_sidebar:=round 1.1*1/10em;


beginchar("a",10cap#,5cap#,5cap#); "veliki, gusti pleter"; %10
pickup pencircle scaled .2thick;
n:=20; % 20
kuts:=360/(2n);
z0=(.5w,0);
r:=.7*.5w; % .7
R:=.5w;
.5[x7,x6]=.5[w-(R-r),w];
x8-x7=x7-x6=x6-x5=1.41*1/7*(R-r);  % def z5,...,z8
y5=y6=y7=y8=0;
z1=(w,0) rotatedaround (z0,kuts);
z4=(w-3*1/7*(R-r),0) rotatedaround (z0,kuts);
z1-z2=z2-z3=z3-z4; % def z1,...,z4
z9=(w-(R-r),0) rotatedaround (z0,-kuts);
z12=(w-(R-r)+3*1/7*(R-r),0) rotatedaround (z0,-kuts);
z12-z11=z11-z10=z10-z9; % def z9,...,z12

path p[]; path q[];
path qq[]; path pp[];
path p$[]; path q$[];
path qq$[]; path pp$[];

for l=1 upto 5:
kutt[l]:=(2l-1)*360/(2n);
kuttt[l]:=kutt[l]-360/n;

for k=1 upto 12: z'[k][l]=z[k] rotatedaround (z0,kutt[l]); endfor
kut[l]=angle (z'[9][l]-z'[1][l]); %-10;
p[l]= z'[1][l]{dir (kutt[l]-90)}..tension1.1..
      {dir(kut[l])}z'[8][l]..{dir (kuttt[l]-90)}z'[12][l];
q[l]= z'[2][l]{dir(kutt[l]-90)}..{dir(kut[l])}z'[7][l]..
      {dir(kuttt[l]-90)}z'[11][l];
qq[l]= z'[3][l]{dir(kutt[l]-90)}..{dir(kut[l])}z'[6][l]..
       {dir(kuttt[l]-90)}z'[10][l];
pp[l]= z'[4][l]{dir(kutt[l]-90)}..{dir(kut[l])}z'[5][l]..
       {dir(kuttt[l]-90)}z'[9][l];

p$[l]= p[l] reflectedabout (z0,z'[8][l]);
q$[l]= q[l] reflectedabout (z0,z'[8][l]);
qq$[l]= qq[l] reflectedabout (z0,z'[8][l]);
pp$[l]= pp[l] reflectedabout (z0,z'[8][l]);

pickup pencircle   scaled .2thick;
draw p[l];
pickup pencircle   scaled .1thick;
draw q[l]; draw qq[l];
pickup pencircle   scaled .2thick;
draw pp[l];
draw p$[l];
pickup pencircle   scaled .1thick;
draw q$[l];  draw qq$[l];
pickup pencircle   scaled .2thick;
draw pp$[l];

unfill z'[1][l]--z'[4][l]{dir(kutt[l]-90)}..{dir(kut[l])}z'[5][l]..
{dir(kuttt[l]-90)}z'[9][l]--z'[12][l]{dir(90+kuttt[l])}..
{dir(kut[l]-180)}z'[8][l]..{dir(90+kutt[l])}z'[1][l]..cycle;
draw p[l];
pickup pencircle   scaled .1thick;
draw q[l]; draw qq[l];
pickup pencircle scaled .2thick;
draw pp[l];
endfor
transform s; s=identity rotatedaround (z0,90);
addto currentpicture also currentpicture transformed s;
addto currentpicture also currentpicture transformed (s transformed s);
endchar;


end.