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tamaas/src/surface/filter.hh
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filter.hh
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/**
* @file
* @section LICENSE
*
* Copyright (©) 2016-2020 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* 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 FILTER_H
#define FILTER_H
/* -------------------------------------------------------------------------- */
#include "fftransform.hh"
#include "grid.hh"
#include "grid_hermitian.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
template <UInt dim>
class Filter {
public:
/// Default constructor
Filter() = default;
/// Destructor
virtual ~Filter() = default;
public:
/// Compute Filter coefficients
virtual void
computeFilter(GridHermitian<Real, dim>& filter_coefficients) const = 0;
protected:
/// Compute filter coefficients using lambda
template <typename T>
void computeFilter(T&& f, GridHermitian<Real, dim>& filter) const;
};
template <UInt dim>
template <typename T>
void Filter<dim>::computeFilter(T&& f, GridHermitian<Real, dim>& filter) const {
auto wavevectors =
FFTransform<Real, dim>::template computeFrequencies<true>(filter.sizes());
Loop::loop(std::forward<T>(f), filter,
range<VectorProxy<Real, dim>>(wavevectors));
}
} // namespace tamaas
#endif // FILTER_H
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