smoothPoly

Creates a smooth version of a polygon. The smoothing mode is set within this. This function creates a composite object that has a single child: the un-smoothed polygon. The un-smoothed polygon still exists and can be changed, which will cause the smoothed object to be re-computed. The smoothed object also has several fields that can be changed. One is the smoothing mode, which says what math will be used to do the smoothing. Parabolic Blend is nice since it the only mode that guarantees the resultant curve will pass through the control polygon. The parabolic blend is quadratic between the vertex 0, 1, and n-2, n-1, every where else it is cubic, and possibly non planer. It is cubic every where if closed.
Quadaratic Uniform Spline is usually nicer looking than the parabolic blend. If end joining is on the resultant curve will to the control polygon end points. The resultant curve will not pass through control vertices. Doubling a vertex will force the curve though the control polygon there.
Cubic Uniform Spline is smoother than the parabolic, sacrificing some local control. Tripling a vertex will force the curve though the control polygon there.

polygons : ObjectSet
Polygons to smooth