Anders:
In the US library is an Object “Sign Handicap 20” which uses the Poly2_{2} command to draw the handicap symbol. It has hard coded x & y points rather than parametric ones like yours, but otherwise the concept is the same. See if you have this object or can search for it or a similar one to look at. Some information about General polygon can be found on this site 05 Basic 2D elements. Maybe the moderators can point to better examples.
David
David Maudlin / Architect
Washington, D.C.
AC 22 - Mac OS