         <td> const</td>
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<p>Compute the distance from the center of the <a class="el" href="classnetdem_1_1_ellipsoid.html" title="A class for representing an ellipsoid shape.">Ellipsoid</a> object to a plane perpendicular to its axis in a given direction. </p>
<p>This private method computes the distance from the center of the <a class="el" href="classnetdem_1_1_ellipsoid.html" title="A class for representing an ellipsoid shape.">Ellipsoid</a> object