-fixed
                reference frame of the segment designated by `handle'
                and `dladsc'. The center of this frame is the origin
                of the cartesian coordinate system in which the
                vertices are expressed. Note that the frame center
                need not coincide with the central body of the
                segment. Units are km.

                If an error occurs on the call, `vrtces' is
                undefined.

</pre><h4><a name="Examples">Examples</a></h