I assume the ''center points'' is referring to the two foci of the ellipse section, but ellipsoids don't have radii so not totally sure what is meant by that.

Yes, the points refer to the two foci of the ellipsoid. As far as I understand, the ellipsoid is inscribed in a sphere with a radius equal to half of the 'ellipsoid radius' that you specified in the XML file.

## Comments

I assume the ''center points'' is referring to the two foci of the ellipse section, but ellipsoids don't have radii so not totally sure what is meant by that.

Yes, the points refer to the two foci of the ellipsoid. As far as I understand, the ellipsoid is inscribed in a sphere with a radius equal to half of the 'ellipsoid radius' that you specified in the XML file.