OptionalcenterThe point the polygon is centered on.
OptionaldirectionThe normal of the plane the polygon lies in; the default lays it flat on the ground.
OptionalnrHow many corners, and so how many equal sides, the polygon has.
OptionalradiusThe distance from the center to each corner, in model units.
A corner count, a radius and a placement for
shapes.wire.createNGonWireandshapes.face.createNGonFace, a regular polygon.