Thank you for the clarification Cemortan_Tudor, I will look into the distinction of segments vs. a joined curve.

My main question is *how* do I get the coordinates of the center of either a circle or arc?

    var curves = moi.geometryDatabase.getSelectedObjects().getCurves();
    for (var i = 0; i < curves.length; ++i) {
        for (var j = 0; j <= curves.item(i).getSubObjects().length; ++j) {
        if ( curves.item(i).getSubObjects().item(j).isCircle || curves.item(i).getSubObjects().item(j).isArc)
           // How do I get the center point?
        }
    }

--Larry

curves.item(i).getSubObjects().item(j).conicFrame.origin;
ex:
var pointfactory = moi.command.createFactory('point');
pointfactory.setInput(0, curves.item(i).getSubObjects().item(j).conicFrame.origin);
pointfactory.commit();

Thank you Tudor! Your code examples helped me to solve the puzzle, much appreciated.

--Larry

The resulting script is here: https://moi3d.com/forum/messages.php?webtag=MOI&msg=9885.1

--Larry