shape_info.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2011 - 2020 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_matrix_free_shape_info_h
#define dealii_matrix_free_shape_info_h
 
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/aligned_vector.h>
#include <deal.II/base/exceptions.h>
#include <deal.II/base/quadrature_lib.h>
 
#include <deal.II/fe/fe.h>
 
 
DEAL_II_NAMESPACE_OPEN
 
namespace internal
{
  namespace MatrixFreeFunctions
  {
    enum ElementType
    {
      tensor_symmetric_collocation = 0,
 
      tensor_symmetric_hermite = 1,
 
      tensor_symmetric = 2,
 
      tensor_general = 3,
 
      truncated_tensor = 4,
 
      tensor_symmetric_plus_dg0 = 5
    };
 
 
 
    template <typename Number>
    struct UnivariateShapeData
    {
      UnivariateShapeData();
 
      std::size_t
      memory_consumption() const;
 
      ElementType element_type;
 
      AlignedVector<Number> shape_values;
 
      AlignedVector<Number> shape_gradients;
 
      AlignedVector<Number> shape_hessians;
 
      AlignedVector<Number> shape_gradients_collocation;
 
      AlignedVector<Number> shape_hessians_collocation;
 
      AlignedVector<Number> shape_values_eo;
 
      AlignedVector<Number> shape_gradients_eo;
 
      AlignedVector<Number> shape_hessians_eo;
 
      AlignedVector<Number> shape_gradients_collocation_eo;
 
      AlignedVector<Number> shape_hessians_collocation_eo;
 
      AlignedVector<Number> inverse_shape_values;
 
      AlignedVector<Number> inverse_shape_values_eo;
 
      AlignedVector<Number> shape_data_on_face[2];
 
      AlignedVector<Number> values_within_subface[2];
 
      AlignedVector<Number> gradients_within_subface[2];
 
      AlignedVector<Number> hessians_within_subface[2];
 
      Quadrature<1> quadrature;
 
      unsigned int fe_degree;
 
      unsigned int n_q_points_1d;
 
      bool nodal_at_cell_boundaries;
    };
 
 
 
    template <typename Number>
    struct ShapeInfo
    {
      ElementType element_type;
 
      ShapeInfo();
 
      template <int dim>
      ShapeInfo(const Quadrature<1> &     quad,
                const FiniteElement<dim> &fe,
                const unsigned int        base_element = 0);
 
      template <int dim>
      void
      reinit(const Quadrature<1> &     quad,
             const FiniteElement<dim> &fe_dim,
             const unsigned int        base_element = 0);
 
      const UnivariateShapeData<Number> &
      get_shape_data(const unsigned int dimension = 0,
                     const unsigned int component = 0) const;
 
      std::size_t
      memory_consumption() const;
 
      std::vector<unsigned int> lexicographic_numbering;
 
      std::vector<UnivariateShapeData<Number>> data;
 
      ::Table<2, UnivariateShapeData<Number> *> data_access;
 
      unsigned int n_dimensions;
 
      unsigned int n_components;
 
      unsigned int n_q_points;
 
      unsigned int dofs_per_component_on_cell;
 
      unsigned int n_q_points_face;
 
      unsigned int dofs_per_component_on_face;
 
      ::Table<2, unsigned int> face_to_cell_index_nodal;
 
      ::Table<2, unsigned int> face_to_cell_index_hermite;
 
    private:
      bool
      check_1d_shapes_symmetric(
        UnivariateShapeData<Number> &univariate_shape_data);
 
      bool
      check_1d_shapes_collocation(
        const UnivariateShapeData<Number> &univariate_shape_data) const;
    };
 
 
 
    // ------------------------------------------ inline functions
 
    template <typename Number>
    template <int dim>
    inline ShapeInfo<Number>::ShapeInfo(const Quadrature<1> &     quad,
                                        const FiniteElement<dim> &fe_in,
                                        const unsigned int base_element_number)
      : element_type(tensor_general)
      , n_dimensions(0)
      , n_components(0)
      , n_q_points(0)
      , dofs_per_component_on_cell(0)
      , n_q_points_face(0)
      , dofs_per_component_on_face(0)
    {
      reinit(quad, fe_in, base_element_number);
    }
 
    template <typename Number>
    inline const UnivariateShapeData<Number> &
    ShapeInfo<Number>::get_shape_data(const unsigned int dimension,
                                      const unsigned int component) const
    {
      AssertDimension(n_dimensions, data_access.size(0));
      AssertDimension(n_components, data_access.size(1));
      AssertIndexRange(dimension, n_dimensions);
      AssertIndexRange(component, n_components);
      return *(data_access(dimension, component));
    }
 
  } // end of namespace MatrixFreeFunctions
 
} // end of namespace internal
 
DEAL_II_NAMESPACE_CLOSE
 
#endif