Reverses
the order of the points on the curve, i.e, first point becomes the last
point and vice versa. This is useful in when constraining a X-Topology curve
to a location surface as in the case of the plane constraint the first point
of the curve marks the planes location. In addition, the point may be reference
to a certain location on another curve. Reverse the points order if the
other end of the X-Topology Curve has a better reference location.