#include <itkSymmetricEllipsoidInteriorExteriorSpatialFunction.h>
Similar to itkEllipsoidInteriorExteriorSpatialFunction in that it implements a function that returns 1 for points inside or on the surface of a ellipsoid and 0 for points outside the ellipsoid. However, this ellipsoid is defined by a single orientation vector and deals only with symmetric ellipsoids. An n-dimensional symmetric ellipsoid is one which has m axes of equal length and (n - m) unique axes lengths. Specifically, this class deals with the case where (n - m) = 1 and the ellipsoid's major axis is oriented along a singles orientation vector.