gauss.hpp

Go to the documentation of this file.

// OpenBEM - Copyright (C) 2026 Shashwat Sharma
 
// This file is part of OpenBEM.
 
// OpenBEM is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3
// of the License, or (at your option) any later version.
 
// You should have received a copy of the GNU General Public License along with OpenBEM.
// If not, see <https://www.gnu.org/licenses/>.
 
 
#ifndef GAUSS_LINE_QUAD_H
#define GAUSS_LINE_QUAD_H
 
#include <vector>
#include <string>
#include <functional>
 
#include "types.hpp"
#include "constants.hpp"
#include "quadrature/utility.hpp"
#include "quadrature/line/base.hpp"
 
 
namespace bem
{
 
template <uint8_t dim>
class GaussLineQuadrature: public LineQuadratureBase<dim>
{
 
    using base = LineQuadratureBase<dim>;
 
public:
 
    GaussLineQuadrature(const uint8_t order = LINE_DEFAULT_ORDER)
    {
        EigColVec<Index> orders = EigColVec<Index>::LinSpaced(LINE_MAX_ORDER, 1, LINE_MAX_ORDER);
        rules_ = load_rules<1> (rule_file_, orders);
        set_order(order);
        return;
    };
 
 
    void set_order(const uint8_t order) override;
 
 
    void compute_points_weights(
        ConstEigRef<EigColVecN<Float, dim>> p1,
        ConstEigRef<EigColVecN<Float, dim>> p2,
        std::function<EigRowVec<Complex> (ConstEigRef<EigMatNX<Float, dim>>)> eval = {}
        ) override;
 
 
    const EigRowVec<Float>& ref_points() const { return rules_[base::order_ - 1].nodes; };
 
 
    const EigRowVec<Float>& ref_weights() const { return rules_[base::order_ - 1].weights; };
 
 
protected:
 
    std::string rule_file_ = "line_quad_gauss.json";
    std::vector<QuadratureRule<1>> rules_;
 
};
 
}
 
#ifndef BEM_LINKED
#include "quadrature/line/gauss.cpp"
#endif
 
#endif