return sphere;
}
*/
public void setPivot( ReferenceFrame pivot ) {
Matrix44 m = getTransformation( pivot );
Matrix44 mInverse = Matrix44.invert( m );
transform( mInverse, this );
for( int i=0; i<getChildCount(); i++ ) {
Component child = getChildAt( i );
if( child instanceof Transformable ) {
((Transformable)child).transform( m, this );