urns a clone of this Geometry3D.
   
  </p><p>NOTE: Because polygons also stores instance-specific data like Appearance
  on the Geometry level, we are considering it only as a set of connections between points, 
  so only coordinates and normals are copied in the clone process.
  
  <p></p>
<span class="label">Returns</span>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="20"></td><td><code><a href="../scenegraph/Geometry3D.html">Geometry3D</a></code> &mdash; 
                        A c