public void _updateXYImpl ( boolean bExact ) { m_envelope . setEmpty ( ) ; AttributeStreamOfDbl stream = ( AttributeStreamOfDbl ) m_vertexAttributes [ 0 ] ; Point2D pt = new Point2D ( ) ; for ( int i = 0 ; i < m_pointCount ; i ++ ) { stream . read ( 2 * i , pt ) ; m_envelope . merge ( pt ) ; } }
\ internal Updates x y intervals .