On Wed, 25 Aug 2004 14:13:28 -0400, Jim parker <jparker@xxxxxxxxxxxx> wrote: > As it currently stands ARCS and CIRCLES are not fully described. You > need at minimum a normal vector to define the orientation of the face in > 3-D space. > Yes, actually this brings up a whole other entity that I'm missing: coordinate systems. In acad circles are always drawn in the plane of a particular UCS. I'm wondering if I should just give a vector attribute to circles and arcs, or give every geometric entity a coordsys attribute and have the coordinate system defined as a separate entity, like layers. Listers?