fe_trace.h

// ---------------------------------------------------------------------
//
// Copyright (C) 2000 - 2018 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, 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.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------

#ifndef dealii_fe_trace_h
#define dealii_fe_trace_h

#include <deal.II/base/config.h>

#include <deal.II/base/tensor_product_polynomials.h>

#include <deal.II/fe/fe_face.h>
#include <deal.II/fe/fe_poly_face.h>
#include <deal.II/fe/fe_q.h>

DEAL_II_NAMESPACE_OPEN

template <int dim, int spacedim = dim>
class FE_TraceQ
  : public FE_PolyFace<TensorProductPolynomials<dim - 1>, dim, spacedim>
{
public:
  FE_TraceQ(unsigned int p);

  virtual std::string
  get_name() const override;

  virtual std::unique_ptr<FiniteElement<dim, spacedim>>
  clone() const override;

  virtual void
  convert_generalized_support_point_values_to_dof_values(
    const std::vector<Vector<double>> &support_point_values,
    std::vector<double> &              nodal_values) const override;

  virtual bool
  has_support_on_face(const unsigned int shape_index,
                      const unsigned int face_index) const override;

  virtual std::pair<Table<2, bool>, std::vector<unsigned int>>
  get_constant_modes() const override;

  virtual bool
  hp_constraints_are_implemented() const override;

  virtual void
  get_face_interpolation_matrix(const FiniteElement<dim, spacedim> &source,
                                FullMatrix<double> &matrix) const override;

  virtual void
  get_subface_interpolation_matrix(const FiniteElement<dim, spacedim> &source,
                                   const unsigned int                  subface,
                                   FullMatrix<double> &matrix) const override;

  virtual FiniteElementDomination::Domination
  compare_for_domination(const FiniteElement<dim, spacedim> &fe_other,
                         const unsigned int codim = 0) const override final;

private:
  FE_Q<dim, spacedim> fe_q;

  static std::vector<unsigned int>
  get_dpo_vector(const unsigned int deg);
};



template <int spacedim>
class FE_TraceQ<1, spacedim> : public FE_FaceQ<1, spacedim>
{
public:
  FE_TraceQ(const unsigned int p);

  std::string
  get_name() const override;
};


DEAL_II_NAMESPACE_CLOSE

#endif