ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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Constant.hpp
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1/*
2 * Copyright (C) 2010-2022 The ESPResSo project
3 *
4 * This file is part of ESPResSo.
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14 * GNU General Public License for more details.
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19#ifndef CORE_EXTERNAL_FIELD_FIELDS_CONSTANT_HPP
20#define CORE_EXTERNAL_FIELD_FIELDS_CONSTANT_HPP
21
22#include "jacobian_type.hpp"
23#include <utils/Vector.hpp>
24
25#include <cstddef>
26
27namespace FieldCoupling {
28namespace Fields {
29/**
30 * @brief A vector field that is constant in space.
31 */
32template <typename T, std::size_t codim> class Constant {
33public:
34 using value_type =
36 using jacobian_type = detail::jacobian_type<T, codim>;
37
38private:
39 value_type m_value;
40
41public:
42 Constant(const value_type &value) : m_value(value) {}
43
44 value_type &value() { return m_value; }
45
46 value_type operator()(const Utils::Vector3d &, double = {}) const {
47 return m_value;
48 }
49 static constexpr jacobian_type jacobian(const Utils::Vector3d &) {
50 return jacobian_type{};
51 }
52
53 bool fits_in_box(const Utils::Vector3d &) const { return true; }
54};
55} // namespace Fields
56} // namespace FieldCoupling
57
58#endif
Vector implementation and trait types for boost qvm interoperability.
A vector field that is constant in space.
Definition Constant.hpp:32
Constant(const value_type &value)
Definition Constant.hpp:42
detail::jacobian_type< T, codim > jacobian_type
Definition Constant.hpp:36
bool fits_in_box(const Utils::Vector3d &) const
Definition Constant.hpp:53
value_type operator()(const Utils::Vector3d &, double={}) const
Definition Constant.hpp:46
typename Utils::decay_to_scalar< Utils::Vector< T, codim > >::type value_type
Definition Constant.hpp:35
static constexpr jacobian_type jacobian(const Utils::Vector3d &)
Definition Constant.hpp:49
Meta function to turns a Vector<1, T> into T.
Definition Vector.hpp:478