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input mpattern;
prologues:=1;
beginpattern(szachy_i);
patterncolor(.8);
fill unitsquare scaled 4mm;
fill unitsquare scaled 4mm shifted (4mm,4mm);
endpattern;
beginpattern(szachy_ii);
fill unitsquare scaled 3mm withcolor .7white;
fill unitsquare scaled 3mm shifted (3mm,3mm) withcolor .7white;
endpattern;
beginfig(1);
fill fullcircle scaled 30mm withpattern szachy_i;
picture q;
q:=currentpicture; clearit;
draw q shifted (10mm*right) rotated 30 scaled .5;
fill unitsquare scaled 20mm withpattern szachy_ii;
endfig;
beginpattern(checker);
u:=1mm;
fill unitsquare scaled u;
fill unitsquare scaled u shifted (u,u);
patternbbox(0,0,2u,2u);
patterntransform(identity slanted .17);
endpattern;
beginpattern(rotated_checker);
fill unitsquare scaled 4mm rotated 45 withcolor .7white;
patterntransform(identity rotated 30);
endpattern;
beginfig(11);
path p;
z1=(1cm,1cm);
p=fullcircle scaled 3cm;
fill p withpattern checker;
unfill p shifted z1;
fill p shifted z1 withpattern rotated_checker;
endfig;
beginpattern(tt);
fill unitsquare scaled 2mm rotated 45 withcolor .5white;
z1=llcorner currentpicture;
z2=lrcorner currentpicture;
z3=urcorner currentpicture;
z4=ulcorner currentpicture;
% draw z1--z2--z3--z4--cycle;
patterntransform(identity rotated 30 slanted .2 yscaled 3);
patternstep((1.1*xpart(urcorner currentpicture-ulcorner currentpicture),
2/3*xpart(urcorner currentpicture-ulcorner currentpicture)));
endpattern;
beginpattern(ttt);
fill unitsquare scaled 2mm rotated 45 withcolor .5white;
z1=llcorner currentpicture;
z2=lrcorner currentpicture;
z3=urcorner currentpicture;
z4=ulcorner currentpicture;
% draw z1--z2--z3--z4--cycle;
patterntransform(identity rotated 30 slanted .2);
patternstep((1.1*xpart(urcorner currentpicture-ulcorner currentpicture),
2/3*xpart(urcorner currentpicture-ulcorner currentpicture)));
endpattern;
beginpattern(tr);
u:=4mm;
z1=(0,0);
z2=(u,0);
z3=(u,2u);
z4=(0,2u);
z12=.5[z1,z2];
z23=.5[z2,z3];
z34=.5[z3,z4];
z41=.5[z4,z1];
draw z12--z23--z34--z41--cycle;
draw z23--z41;
draw z1--z2;
draw z3--z4;
patternbbox(z1,z3);
patterntransform(identity slanted .1 rotated 11);
patternstep(1.2(x2-x1),1.2(y3-y1));
endpattern;
beginfig(12);
path p;
z1=(1cm,1cm);
p=fullcircle scaled 3cm;
fill p withpattern tt;
draw p;
unfill p shifted z1;
fill p shifted z1 withpattern tr;
draw p shifted z1;
endfig;
beginpattern(ll);
pickup pencircle scaled .3;
draw origin--4up;
patternbbox(left,4up+right);
patterntransform(identity rotated -45);
endpattern;
beginpattern(lll);
pickup pencircle scaled .3;
draw origin--4up;
patternbbox(left,4up+right);
patterntransform(identity rotated 45);
endpattern;
beginpattern(literki);
label(btex \font\q=ptmr8r at 5pt\q abcd etex,origin);
z1=ulcorner currentpicture;
z2=urcorner currentpicture;
patterntransform(identity slanted .17);
endpattern;
beginpattern(cm_literki);
label(btex \font\q=cmr5\q xyz XYZ ZYX zyx etex,origin);
z1=ulcorner currentpicture;
z2=urcorner currentpicture;
patterntransform(identity slanted .17);
endpattern;
beginfig(13);
label(btex \font\q=ptmr8r at 90pt\q ABCD etex, origin) withpattern ll;
endfig;
beginfig(14);
picture a; a=btex \font\q=ptmbi8r at 90pt\q ABCD etex;
draw a withpattern literki;
undraw a shifted (20up+10right);
draw a shifted (20up+10right) withpattern checker;
undraw a shifted (40up+20right);
draw a shifted (40up+20right) withpattern lll;
draw a shifted (40up+20right) withpattern ll;
undraw a shifted (60up+30right);
draw a shifted (60up+30right) withpattern cm_literki;
endfig;
end.
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