tensor_polynomials_base.h

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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2019 - 2023 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
 
#ifndef dealii_tensor_polynomials_base_h
#define dealii_tensor_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 <memory>
#include <string>
#include <vector>
 
DEAL_II_NAMESPACE_OPEN
 
template <int dim>
class TensorPolynomialsBase
{
public:
  TensorPolynomialsBase(const unsigned int deg,
                        const unsigned int n_polynomials);
 
  TensorPolynomialsBase(TensorPolynomialsBase<dim> &&) = default; // NOLINT
 
  TensorPolynomialsBase(const TensorPolynomialsBase<dim> &) = default;
 
  virtual ~TensorPolynomialsBase() = default;
 
  virtual void
  evaluate(const Point<dim>            &unit_point,
           std::vector<Tensor<1, dim>> &values,
           std::vector<Tensor<2, dim>> &grads,
           std::vector<Tensor<3, dim>> &grad_grads,
           std::vector<Tensor<4, dim>> &third_derivatives,
           std::vector<Tensor<5, dim>> &fourth_derivatives) const = 0;
 
  unsigned int
  n() const;
 
  unsigned int
  degree() const;
 
  virtual std::unique_ptr<TensorPolynomialsBase<dim>>
  clone() const = 0;
 
  virtual std::string
  name() const = 0;
 
private:
  const unsigned int polynomial_degree;
 
  const unsigned int n_pols;
};
 
 
 
template <int dim>
inline unsigned int
TensorPolynomialsBase<dim>::n() const
{
  return n_pols;
}
 
 
 
template <int dim>
inline unsigned int
TensorPolynomialsBase<dim>::degree() const
{
  return polynomial_degree;
}
 
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif