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_COMPOSITE_H
      21             : #define LIBMESH_QUADRATURE_COMPOSITE_H
      22             : 
      23             : #include "libmesh/libmesh_config.h"
      24             : 
      25             : #if defined(LIBMESH_HAVE_TRIANGLE) && defined(LIBMESH_HAVE_TETGEN)
      26             : 
      27             : // Local includes
      28             : #include "libmesh/quadrature.h"
      29             : #include "libmesh/elem_cutter.h"
      30             : #include "libmesh/fe_base.h"
      31             : 
      32             : // C++ includes
      33             : #include <memory>
      34             : 
      35             : namespace libMesh
      36             : {
      37             : 
      38             : /**
      39             :  * This class implements generic composite quadrature rules.
      40             :  * Composite quadrature rules are constructed from any of the
      41             :  * supported rules by breaking an element into subelements and
      42             :  * applying the base rule on each subelement.  This class uses the
      43             :  * ElemCutter, which is only available if libmesh is configured with
      44             :  * --disable-strict-lgpl.
      45             :  *
      46             :  * \author Benjamin Kirk
      47             :  * \date 2013
      48             :  * \brief A quadrature rule for subdivided elements.
      49             :  */
      50             : template <class QSubCell>
      51             : class QComposite final : public QSubCell
      52             : {
      53             : public:
      54             : 
      55             :   /**
      56             :    * Import base class data into namespace scope.
      57             :    */
      58             :   using QSubCell::_dim;
      59             :   using QSubCell::_points;
      60             :   using QSubCell::_weights;
      61             :   using QSubCell::init;
      62             : 
      63             :   /**
      64             :    * Constructor.  Declares the order of the quadrature rule.
      65             :    */
      66             :   QComposite (unsigned int dim,
      67             :               Order order=INVALID_ORDER);
      68             : 
      69             :   /**
      70             :    * This class contains a unique_ptr member, so it can't be default
      71             :    * copy constructed or assigned.
      72             :    */
      73             :   QComposite (const QComposite &) = delete;
      74             :   QComposite & operator= (const QComposite &) = delete;
      75             : 
      76             :   /**
      77             :    * Copy/move ctor, copy/move assignment operator, and destructor are
      78             :    * all explicitly defaulted for this simple class.
      79             :    */
      80             :   QComposite (QComposite &&) = default;
      81             :   QComposite & operator= (QComposite &&) = default;
      82           0 :   virtual ~QComposite() = default;
      83             : 
      84             :   /**
      85             :    * \returns \p QCOMPOSITE.
      86             :    */
      87             :   virtual QuadratureType type() const override;
      88             : 
      89             :   /**
      90             :    * Overrides the base class init() function, and uses the ElemCutter to
      91             :    * subdivide the element into "inside" and "outside" subelements.
      92             :    */
      93             :   virtual void init (const Elem & elem,
      94             :                      const std::vector<Real> & vertex_distance_func,
      95             :                      unsigned int p_level=0) override;
      96             : 
      97             : private:
      98             : 
      99             :   /**
     100             :    * Helper function called from init() to collect all the points and
     101             :    * weights of the subelement quadrature rules.
     102             :    */
     103             :   void add_subelem_values (const std::vector<Elem const *> & subelem);
     104             : 
     105             :   /**
     106             :    * Subcell quadrature object.
     107             :    */
     108             :   QSubCell _q_subcell;
     109             : 
     110             :   /**
     111             :    * ElemCutter object.
     112             :    */
     113             :   ElemCutter _elem_cutter;
     114             : 
     115             :   /**
     116             :    * Lagrange FE to use for subcell mapping.
     117             :    */
     118             :   std::unique_ptr<FEBase> _lagrange_fe;
     119             : };
     120             : 
     121             : } // namespace libMesh
     122             : 
     123             : #endif // LIBMESH_HAVE_TRIANGLE && LIBMESH_HAVE_TETGEN
     124             : #endif // LIBMESH_QUADRATURE_COMPOSITE_H