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tamaas/src/surface_generator_filter_bessel.hh
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surface_generator_filter_bessel.hh
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/**
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Tamaas 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef SURFACE_GENERATOR_FILTER_BESSEL_H
#define SURFACE_GENERATOR_FILTER_BESSEL_H
/* -------------------------------------------------------------------------- */
#include "surface_generator.hh"
#include "surface_generator_filter.hh"
/* -------------------------------------------------------------------------- */
class SurfaceGeneratorFilterBessel : public virtual SurfaceGeneratorFilter {
public:
//! constructor
SurfaceGeneratorFilterBessel();
protected:
void parseInputFile(std::ifstream & fp);
void computeFilterCoefficients();
Real besselFunction1(Real x);
Real lanczosFunction(Real x,int order);
//! cutofffrequency
Real alpha;
};
#endif
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