Line data    Source code

       1             : // The libMesh Finite Element Library.
       2             : // Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
       3             : 
       4             : // This library is free software; you can redistribute it and/or
       5             : // modify it under the terms of the GNU Lesser General Public
       6             : // License as published by the Free Software Foundation; either
       7             : // version 2.1 of the License, or (at your option) any later version.
       8             : 
       9             : // This library is distributed in the hope that it will be useful,
      10             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             : // Lesser General Public License for more details.
      13             : 
      14             : // You should have received a copy of the GNU Lesser General Public
      15             : // License along with this library; if not, write to the Free Software
      16             : // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      17             : 
      18             : 
      19             : 
      20             : #ifndef LIBMESH_QUADRATURE_GAUSS_LOBATTO_H
      21             : #define LIBMESH_QUADRATURE_GAUSS_LOBATTO_H
      22             : 
      23             : // Local includes
      24             : #include "libmesh/quadrature.h"
      25             : 
      26             : namespace libMesh
      27             : {
      28             : 
      29             : /**
      30             :  * This class implements Gauss-Lobatto quadrature for 1D elements and 2D/3D
      31             :  * tensor product elements.  Properties of Gauss-Lobatto quadrature rules:
      32             :  * .) Include the "end-points" of the domain (have points on edges/faces in 2D/3D).
      33             :  * .) Rules with n points can exactly integrate polynomials of degree 2n-3.
      34             :  *
      35             :  * http://en.wikipedia.org/wiki/Gaussian_quadrature#Gauss.E2.80.93Lobatto_rules
      36             :  *
      37             :  * \author John W. Peterson
      38             :  * \date 2014
      39             :  * \brief Implements 1D and 2/3D tensor product Gauss-Lobatto quadrature rules.
      40             :  */
      41             : class QGaussLobatto final : public QBase
      42             : {
      43             : public:
      44             : 
      45             :   /**
      46             :    * Constructor.  Declares the order of the quadrature rule.
      47             :    */
      48             :   QGaussLobatto (unsigned int dim,
      49             :                  Order order=INVALID_ORDER);
      50             : 
      51             :   /**
      52             :    * Copy/move ctor, copy/move assignment operator, and destructor are
      53             :    * all explicitly defaulted for this simple class.
      54             :    */
      55           0 :   QGaussLobatto (const QGaussLobatto &) = default;
      56             :   QGaussLobatto (QGaussLobatto &&) = default;
      57             :   QGaussLobatto & operator= (const QGaussLobatto &) = default;
      58             :   QGaussLobatto & operator= (QGaussLobatto &&) = default;
      59       15080 :   virtual ~QGaussLobatto() = default;
      60             : 
      61             :   /**
      62             :    * \returns \p QGAUSS_LOBATTO.
      63             :    */
      64             :   virtual QuadratureType type() const override;
      65             : 
      66             :   virtual std::unique_ptr<QBase> clone() const override;
      67             : 
      68             : private:
      69             : 
      70             :   virtual void init_1D () override;
      71             :   virtual void init_2D () override;
      72             :   virtual void init_3D () override;
      73             : };
      74             : 
      75             : } // namespace libMesh
      76             : 
      77             : #endif // LIBMESH_QUADRATURE_GAUSS_LOBATTO_H