% --- start of displayed preamble in the book --- input metaobj % Circle produced as before % --- end of displayed preamble in the book --- newCircle.a(btex start etex); a.c=origin; defaultfont:="ptmr8r"; warningcheck:=0; beginfig(1) nccircle(a) "angleA(0)", "linecolor(blue)","linewidth(1pt)"; drawObj(a); endfig; end;