fe_nedelec_sz.h

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// -----------------------------------------------------------------------------
//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception OR LGPL-2.1-or-later
// Copyright (C) 2018 - 2026 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Detailed license information governing the source code and contributions
// can be found in LICENSE.md and CONTRIBUTING.md at the top level directory.
//
// -----------------------------------------------------------------------------
 
#ifndef dealii_fe_nedelec_sz_h
#define dealii_fe_nedelec_sz_h
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/derivative_form.h>
#include <deal.II/base/polynomials_integrated_legendre_sz.h>
 
#include <deal.II/fe/fe.h>
#include <deal.II/fe/mapping.h>
 
DEAL_II_NAMESPACE_OPEN
 
template <int dim, int spacedim = dim>
class FE_NedelecSZ : public FiniteElement<dim, dim>
{
public:
  static_assert(dim == spacedim,
                "FE_NedelecSZ is only implemented for dim==spacedim!");
 
  FE_NedelecSZ(const unsigned int order);
 
  virtual UpdateFlags
  requires_update_flags(const UpdateFlags update_flags) const override;
 
  virtual std::string
  get_name() const override;
 
  virtual std::unique_ptr<FiniteElement<dim, dim>>
  clone() const override;
 
  virtual double
  shape_value(const unsigned int i, const Point<dim> &p) const override;
 
  virtual double
  shape_value_component(const unsigned int i,
                        const Point<dim>  &p,
                        const unsigned int component) const override;
 
  virtual Tensor<1, dim>
  shape_grad(const unsigned int i, const Point<dim> &p) const override;
 
  virtual Tensor<1, dim>
  shape_grad_component(const unsigned int i,
                       const Point<dim>  &p,
                       const unsigned int component) const override;
 
  virtual Tensor<2, dim>
  shape_grad_grad(const unsigned int i, const Point<dim> &p) const override;
 
  virtual Tensor<2, dim>
  shape_grad_grad_component(const unsigned int i,
                            const Point<dim>  &p,
                            const unsigned int component) const override;
 
  virtual const FullMatrix<double> &
  get_prolongation_matrix(
    const unsigned int         child,
    const RefinementCase<dim> &refinement_case =
      RefinementCase<dim>::isotropic_refinement) const override;
 
protected:
  MappingKind mapping_kind;
 
  void
  evaluate(const std::vector<Point<dim>> &p_list,
           const UpdateFlags              update_flags,
           std::unique_ptr<
             typename ::FiniteElement<dim, spacedim>::InternalDataBase>
             &data_ptr) const;
 
  virtual std::unique_ptr<
    typename ::FiniteElement<dim, spacedim>::InternalDataBase>
  get_data(
    const UpdateFlags             update_flags,
    const Mapping<dim, spacedim> &mapping,
    const Quadrature<dim>        &quadrature,
    ::internal::FEValuesImplementation::FiniteElementRelatedData<dim,
                                                                       spacedim>
      &output_data) const override;
 
  virtual void
  fill_fe_values(
    const typename Triangulation<dim, dim>::cell_iterator &cell,
    const CellSimilarity::Similarity                       cell_similarity,
    const Quadrature<dim>                                 &quadrature,
    const Mapping<dim, dim>                               &mapping,
    const typename Mapping<dim, dim>::InternalDataBase    &mapping_internal,
    const internal::FEValuesImplementation::MappingRelatedData<dim, dim>
                                                             &mapping_data,
    const typename FiniteElement<dim, dim>::InternalDataBase &fedata,
    ::internal::FEValuesImplementation::FiniteElementRelatedData<dim, dim>
      &data) const override;
 
  using FiniteElement<dim, spacedim>::fill_fe_face_values;
 
  virtual void
  fill_fe_face_values(
    const typename Triangulation<dim, dim>::cell_iterator &cell,
    const unsigned int                                     face_no,
    const hp::QCollection<dim - 1>                        &quadrature,
    const Mapping<dim, dim>                               &mapping,
    const typename Mapping<dim, dim>::InternalDataBase    &mapping_internal,
    const internal::FEValuesImplementation::MappingRelatedData<dim, dim>
                                                             &mapping_data,
    const typename FiniteElement<dim, dim>::InternalDataBase &fedata,
    ::internal::FEValuesImplementation::FiniteElementRelatedData<dim, dim>
      &data) const override;
 
  virtual void
  fill_fe_subface_values(
    const typename Triangulation<dim, dim>::cell_iterator &cell,
    const unsigned int                                     face_no,
    const unsigned int                                     sub_no,
    const Quadrature<dim - 1>                             &quadrature,
    const Mapping<dim, dim>                               &mapping,
    const typename Mapping<dim, dim>::InternalDataBase    &mapping_internal,
    const internal::FEValuesImplementation::MappingRelatedData<dim, dim>
                                                             &mapping_data,
    const typename FiniteElement<dim, dim>::InternalDataBase &fedata,
    ::internal::FEValuesImplementation::FiniteElementRelatedData<dim, dim>
      &data) const override;
 
  class InternalData : public FiniteElement<dim, dim>::InternalDataBase
  {
  public:
    mutable std::vector<std::vector<Tensor<1, dim>>> shape_values;
 
    mutable std::vector<std::vector<DerivativeForm<1, dim, dim>>> shape_grads;
 
    mutable std::vector<std::vector<DerivativeForm<2, dim, dim>>>
      shape_hessians;
 
    std::vector<std::vector<std::vector<double>>> sigma_imj_values;
 
    std::vector<std::vector<std::vector<double>>> sigma_imj_grads;
 
    std::vector<std::vector<double>> edge_sigma_values;
 
    std::vector<std::vector<double>> edge_sigma_grads;
 
    std::vector<std::vector<double>> edge_lambda_values;
 
    std::vector<std::vector<double>> edge_lambda_grads_2d;
 
    std::vector<std::vector<std::vector<double>>> edge_lambda_grads_3d;
 
    std::vector<std::vector<std::vector<double>>> edge_lambda_gradgrads_3d;
 
    std::vector<std::vector<double>> face_lambda_values;
 
    std::vector<std::vector<double>> face_lambda_grads;
  };
 
private:
  static std::vector<unsigned int>
  get_dpo_vector(const unsigned int degree);
 
  std::vector<Polynomials::Polynomial<double>> IntegratedLegendrePolynomials;
 
  void
  create_polynomials(const unsigned int degree);
 
  unsigned int
  compute_num_dofs(const unsigned int degree) const;
 
  void
  fill_edge_values(const typename Triangulation<dim, dim>::cell_iterator &cell,
                   const Quadrature<dim> &quadrature,
                   const InternalData    &fedata) const;
 
  void
  fill_face_values(const typename Triangulation<dim, dim>::cell_iterator &cell,
                   const Quadrature<dim> &quadrature,
                   const InternalData    &fedata) const;
 
  mutable Threads::Mutex prolongation_matrix_mutex;
};
 
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif