scalar_polynomials_base.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2005 - 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.
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#ifndef dealii_scalar_polynomials_base_h
#define dealii_scalar_polynomials_base_h


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

#include <deal.II/base/exceptions.h>
#include <deal.II/base/point.h>
#include <deal.II/base/tensor.h>

#include <vector>

DEAL_II_NAMESPACE_OPEN

template <int dim>
class ScalarPolynomialsBase
{
public:
  ScalarPolynomialsBase(const unsigned int deg,
                        const unsigned int n_polynomials);

  ScalarPolynomialsBase(ScalarPolynomialsBase<dim> &&) = default; // NOLINT

  ScalarPolynomialsBase(const ScalarPolynomialsBase<dim> &) = default;

  virtual ~ScalarPolynomialsBase() = default;

  virtual void
  evaluate(const Point<dim> &           unit_point,
           std::vector<double> &        values,
           std::vector<Tensor<1, dim>> &grads,
           std::vector<Tensor<2, dim>> &grad_grads,
           std::vector<Tensor<3, dim>> &third_derivatives,
           std::vector<Tensor<4, dim>> &fourth_derivatives) const = 0;

  unsigned int
  n() const;

  unsigned int
  degree() const;

  virtual std::unique_ptr<ScalarPolynomialsBase<dim>>
  clone() const = 0;

  virtual std::string
  name() const = 0;

  virtual std::size_t
  memory_consumption() const;

private:
  const unsigned int polynomial_degree;

  const unsigned int n_pols;
};



template <int dim>
inline unsigned int
ScalarPolynomialsBase<dim>::n() const
{
  return n_pols;
}



template <int dim>
inline unsigned int
ScalarPolynomialsBase<dim>::degree() const
{
  return polynomial_degree;
}



DEAL_II_NAMESPACE_CLOSE

#endif