quadrature_composite.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef LIBMESH_QUADRATURE_COMPOSITE_H
#define LIBMESH_QUADRATURE_COMPOSITE_H

#include "libmesh/libmesh_config.h"

#if defined(LIBMESH_HAVE_TRIANGLE) && defined(LIBMESH_HAVE_TETGEN)

// Local includes
#include "libmesh/quadrature.h"
#include "libmesh/elem_cutter.h"
#include "libmesh/fe_base.h"

// C++ includes
#include <memory>

namespace libMesh
{

template <class QSubCell>
class QComposite final : public QSubCell
{
public:

  using QSubCell::_dim;
  using QSubCell::_points;
  using QSubCell::_weights;
  using QSubCell::init;

  QComposite (unsigned int dim,
              Order order=INVALID_ORDER);

  QComposite (const QComposite &) = delete;
  QComposite & operator= (const QComposite &) = delete;

  QComposite (QComposite &&) = default;
  QComposite & operator= (QComposite &&) = default;
  virtual ~QComposite() = default;

  virtual QuadratureType type() const override;

  virtual void init (const Elem & elem,
                     const std::vector<Real> & vertex_distance_func,
                     unsigned int p_level=0) override;

private:

  void add_subelem_values (const std::vector<Elem const *> & subelem);

  QSubCell _q_subcell;

  ElemCutter _elem_cutter;

  std::unique_ptr<FEBase> _lagrange_fe;
};

} // namespace libMesh

#endif // LIBMESH_HAVE_TRIANGLE && LIBMESH_HAVE_TETGEN
#endif // LIBMESH_QUADRATURE_COMPOSITE_H