Reference documentation for deal.II version 9.5.0
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function_bessel.h
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1// ---------------------------------------------------------------------
2//
3// Copyright (C) 2010 - 2020 by the deal.II authors
4//
5// This file is part of the deal.II library.
6//
7// The deal.II library is free software; you can use it, redistribute
8// it, and/or modify it under the terms of the GNU Lesser General
9// Public License as published by the Free Software Foundation; either
10// version 2.1 of the License, or (at your option) any later version.
11// The full text of the license can be found in the file LICENSE.md at
12// the top level directory of deal.II.
13//
14// ---------------------------------------------------------------------
15
16#ifndef dealii_function_bessel_h
17#define dealii_function_bessel_h
18
19
20#include <deal.II/base/config.h>
21
23#include <deal.II/base/point.h>
24
26
27namespace Functions
28{
34 template <int dim>
35 class Bessel1 : public Function<dim>
36 {
37 public:
41 Bessel1(const unsigned int order,
42 const double wave_number,
43 const Point<dim> center = Point<dim>());
44
45 virtual double
46 value(const Point<dim> & points,
47 const unsigned int component = 0) const override;
48
49 virtual void
50 value_list(const std::vector<Point<dim>> &points,
51 std::vector<double> & values,
52 const unsigned int component = 0) const override;
53
54 virtual Tensor<1, dim>
55 gradient(const Point<dim> & p,
56 const unsigned int component = 0) const override;
57
58 virtual void
59 gradient_list(const std::vector<Point<dim>> &points,
60 std::vector<Tensor<1, dim>> & gradients,
61 const unsigned int component = 0) const override;
62
63 private:
64 unsigned int order;
67 };
68} // namespace Functions
69
71
72#endif
virtual Tensor< 1, dim > gradient(const Point< dim > &p, const unsigned int component=0) const override
virtual void value_list(const std::vector< Point< dim > > &points, std::vector< double > &values, const unsigned int component=0) const override
virtual double value(const Point< dim > &points, const unsigned int component=0) const override
virtual void gradient_list(const std::vector< Point< dim > > &points, std::vector< Tensor< 1, dim > > &gradients, const unsigned int component=0) const override
Definition point.h:112
#define DEAL_II_NAMESPACE_OPEN
Definition config.h:472
#define DEAL_II_NAMESPACE_CLOSE
Definition config.h:473