The Anatomy of a Smilie #metapost-sandbox

main.mp

                                                            
beginfig(0);
radius := 50;
pickup pencircle scaled 2;
path p;
path s, second;

z0 = (0, radius);
z1=((x0+x2)/2,y0+radius);
z2 = (x1+radius,y0);
z3 = (x1,y0-radius);
p := z0..z1..z2..z3..cycle;
fill p withcolor 0.5blue;
draw p withcolor white;


clearxy;

z0 = (xpart point 0.5 of p, 0.5radius);
z1 = (xpart point 1.5 of p, y0);
s:=z0{dir +45}..{dir -45}z1;
draw s withcolor white;

second:=s scaled 1 shifted (0,20);
draw second withcolor white;


endfig;
end