Reference documentation for deal.II version 9.5.0
\(\newcommand{\dealvcentcolon}{\mathrel{\mathop{:}}}\) \(\newcommand{\dealcoloneq}{\dealvcentcolon\mathrel{\mkern-1.2mu}=}\) \(\newcommand{\jump}[1]{\left[\!\left[ #1 \right]\!\right]}\) \(\newcommand{\average}[1]{\left\{\!\left\{ #1 \right\}\!\right\}}\)
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function_derivative.h
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1// ---------------------------------------------------------------------
2//
3// Copyright (C) 2000 - 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_derivative_h
17#define dealii_function_derivative_h
18
19#include <deal.II/base/config.h>
20
24
26
27
43template <int dim>
45{
46public:
53 const Point<dim> & direction,
54 const double h = 1.e-6);
55
69 const std::vector<Point<dim>> &direction,
70 const double h = 1.e-6);
71
80 void
86 void
87 set_h(const double h);
88
89 virtual double
90 value(const Point<dim> &p, const unsigned int component = 0) const override;
91
92 virtual void
93 vector_value(const Point<dim> &p, Vector<double> &value) const override;
94
95 virtual void
96 value_list(const std::vector<Point<dim>> &points,
97 std::vector<double> & values,
98 const unsigned int component = 0) const override;
99
105 virtual std::size_t
106 memory_consumption() const override;
107
108private:
113
117 double h;
118
123
127 std::vector<Tensor<1, dim>> incr;
128};
129
131
132#endif
virtual std::size_t memory_consumption() const override
virtual void vector_value(const Point< dim > &p, Vector< double > &value) const override
void set_h(const double h)
virtual void value_list(const std::vector< Point< dim > > &points, std::vector< double > &values, const unsigned int component=0) const override
AutoDerivativeFunction< dim >::DifferenceFormula formula
virtual double value(const Point< dim > &p, const unsigned int component=0) const override
const Function< dim > & f
std::vector< Tensor< 1, dim > > incr
void set_formula(typename AutoDerivativeFunction< dim >::DifferenceFormula formula=AutoDerivativeFunction< dim >::Euler)
Definition point.h:112
#define DEAL_II_NAMESPACE_OPEN
Definition config.h:472
#define DEAL_II_NAMESPACE_CLOSE
Definition config.h:473