Barr's "superquadrics" ellipsoid.

  [x,y,z] = SUPERQUAD(n,e,m) is a generalized ellipsoid with

  n = vertical roundness, e = horizontal roundness and m facets.

  If values of n and e are not given, random values are supplied.

  The default value of m is 24.



  SUPERQUAD(...) , with no output arguments, does a SURF1F43EU2 plot.



  Ref: A. H. Barr, IEEE Computer Graphics and Applications, 1981,

       or, Graphics Gems III, David Kirk, editor, 1992.



  See also: SQDEMO2XSGNWP.