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tamaas/src/model/integral_operator.hh
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integral_operator.hh
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/*
* SPDX-License-Indentifier: AGPL-3.0-or-later
*
* Copyright (©) 2016-2022 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
* Copyright (©) 2020-2022 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 INTEGRAL_OPERATOR_HH
#define INTEGRAL_OPERATOR_HH
/* -------------------------------------------------------------------------- */
#include "grid_base.hh"
#include "model_type.hh"
#include "field_container.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
/* -------------------------------------------------------------------------- */
class Model;
/**
* @brief Generic class for integral operators
*/
class IntegralOperator : public FieldContainer {
public:
/// Kind of operator
enum kind { neumann, dirichlet, dirac };
public:
/// Constructor
IntegralOperator(Model* model) : model(model) {}
/// Apply operator on input
virtual void apply(GridBase<Real>& input, GridBase<Real>& output) const = 0;
/// Apply operator on filtered input
virtual void applyIf(GridBase<Real>& input, GridBase<Real>& output,
const std::function<bool(UInt)>& /*unused*/) const {
apply(input, output);
}
/// Update any data dependent on model parameters
virtual void updateFromModel() = 0;
/// Get model
const Model& getModel() const { return *model; }
/// Kind
virtual kind getKind() const = 0;
/// Type
virtual model_type getType() const = 0;
/// Norm
virtual Real getOperatorNorm() {
TAMAAS_EXCEPTION("operator does not implement norm");
}
/// Dense shape (for Scipy integration)
virtual std::pair<UInt, UInt> matvecShape() const {
TAMAAS_EXCEPTION("operator does not implement "
"scipy.sparse.linalg.LinearOperator interface");
}
/// matvec definition
virtual GridBase<Real> matvec(GridBase<Real>& /*x*/) const {
TAMAAS_EXCEPTION("operator does not implement "
"scipy.sparse.linalg.LinearOperator interface");
}
protected:
Model* model = nullptr;
};
/* -------------------------------------------------------------------------- */
/* Printing IntegralOperator::kind to string */
/* -------------------------------------------------------------------------- */
std::ostream& operator<<(std::ostream& o, const IntegralOperator::kind& val);
} // namespace tamaas
#endif // INTEGRAL_OPERATOR_HH
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