surface_generator_filter_bessel.hh
fbfcad1b6cb9maxwell_viscoelastic…

surface_generator_filter_bessel.hh
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			#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 : takes a config file as input
			SurfaceGeneratorFilterBessel(const std::string & inputfile);

			protected:

			void parseInputFile(std::ifstream & fp);
			void computeFilterCoefficients();
			Real besselFunction1(Real x);
			Real lanczosFunction(Real x,int order);

			//! cutofffrequency
			Real alpha;

			};

			#endif