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tamaas/src/model/kelvin.hh
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kelvin.hh
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/*
* SPDX-License-Indentifier: AGPL-3.0-or-later
*
* Copyright (©) 2016-2024 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
* Copyright (©) 2020-2024 Lucas Frérot
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef KELVIN_HH
#define KELVIN_HH
/* -------------------------------------------------------------------------- */
#include "grid_hermitian.hh"
#include "influence.hh"
#include "integration/accumulator.hh"
#include "kelvin_helper.hh"
#include "model_type.hh"
#include "volume_potential.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
/// Integration method enumeration
enum class integration_method { cutoff, linear };
/**
* @brief Kelvin tensor
*/
template <model_type type, UInt derivative>
class Kelvin : public VolumePotential<type> {
static_assert(type == model_type::volume_1d || type == model_type::volume_2d,
"Only volume types are supported");
using trait = model_type_traits<type>;
using dtrait = derivative_traits<derivative>;
using parent = VolumePotential<type>;
protected:
using KelvinInfluence = influence::Kelvin<trait::dimension, derivative>;
using ktrait = detail::KelvinTrait<KelvinInfluence>;
using Source = typename ktrait::source_t;
using Out = typename ktrait::out_t;
using filter_t = typename parent::filter_t;
public:
/// Constructor
Kelvin(Model* model);
/// Apply the Kelvin-tensor_order operator
void applyIf(GridBase<Real>& source, GridBase<Real>& out,
filter_t pred) const override;
/// Set the integration method for volume operator
void setIntegrationMethod(integration_method method, Real cutoff);
std::pair<UInt, UInt> matvecShape() const override;
GridBase<Real> matvec(GridBase<Real>& X) const override;
private:
void linearIntegral(GridBase<Real>& out, KelvinInfluence& kelvin) const;
void cutoffIntegral(GridBase<Real>& out, KelvinInfluence& kelvin) const;
protected:
integration_method method = integration_method::linear;
Real cutoff;
};
} // namespace tamaas
#endif // KELVIN_HH
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