sampler.h

/*****************************************************************************
* Multiscale Universal Interface Code Coupling Library                       *
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* Copyright (C) 2019 Y. H. Tang, S. Kudo, X. Bian, Z. Li, G. E. Karniadakis  *
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* ** GNU General Public License, version 3 **                                *
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/**
 * @file sampler.h
 * @author Y. H. Tang
 * @date 10 February 2014
 * @brief A reference file for making custom samplers. The new sampler does
 * not have to derive from this class, it just needs to implement all the
 * interfaces with the signatures specified.
 */

#ifndef MUI_SAMPLER_H_
#define MUI_SAMPLER_H_

#include "config.h"
#include "geometry.h"
#include "virtual_container.h"

namespace mui {

#if 0
class sampler {
public:
    sampler() {
        r = 1.0;
    }

    double filter( point<double,3> focus, const virtual_container<double> &data_points ) const {
        double sum = 0.;
        int n = 0;
        for( size_t i = 0 ; i < data_points.size() ; i++ ) {
            if ( ( focus - data_points[i].first ).norm() < r ) {
                sum += data_points[i].second;
                n++;
            }
        }
        if (n) return sum / n;
        else return 0;
    }
    inline span<> support() const {
        return span<>() || geometry::sphere<>( point<double,3>(0), r );
    }

protected:
    double r;
};

#endif
}

#endif /* MUI_SAMPLER_H_ */