ctors x in three-dimensional
               space that satisfy

                  &lt; x - point, normal &gt;  =  0.

               'point' is always the closest point in the input
               plane to the origin. 'point' is always a
               non-negative scalar multiple of 'normal'.

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

   Any numerical results shown for this example may differ between
   platforms as the results depend on the SPICE kernels used as input
   and the machine specifi