strategic.hpp

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// 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 BEM_RWG_OPINT_SRC_STRATEGIC_H
#define BEM_RWG_OPINT_SRC_STRATEGIC_H
 
#include "types.hpp"
 
#include "geometry/primitives/triangle.hpp"
#include "quadrature/triangle/base.hpp"
#include "quadrature/triangle/gauss.hpp"
#include "quadrature/line/base.hpp"
#include "quadrature/line/gauss.hpp"
 
#include "kernels/hgf.hpp"
#include "rwg/integrators/src/base.hpp"
#include "rwg/integrators/src/quadrature.hpp"
#include "rwg/integrators/src/singularity.hpp"
#include "rwg/integrators/src/line.hpp"
 
 
namespace bem::rwg
{
 
struct SrcIntegrationSettings
{
    Float tri_order_far = 4;
 
    Float tri_order_near = 8;
 
    Float line_order = 10;
 
    Float threshold_wvl_singularity = 0.1;
 
    Float threshold_dist_singularity = -1;
 
    Float threshold_length_line_int = 1;
 
    Float threshold_skin_depths = 10;
};
 
 
template <typename TriangleQuadratureType = GaussTriangleQuadrature<2>, typename LineQuadratureType = GaussLineQuadrature<1>>
class SrcStrategic: public SrcIntegratorBase
{
 
    using base = SrcIntegratorBase;
    static_assert(
        std::is_base_of<TriangleQuadratureBase<2>, TriangleQuadratureType>::value,
        "SrcStrategic: `TriangleQuadratureType` must derive from `TriangleQuadratureBase<2>`"
        );
    static_assert(
        std::is_base_of<LineQuadratureBase<1>, LineQuadratureType>::value,
        "SrcStrategic: `LineQuadratureType` must derive from `LineQuadratureBase<1>`"
        );
 
public:
 
    SrcStrategic(
        const SrcIntegrationSettings settings = SrcIntegrationSettings(),
        const TriangleQuadratureType tri_quad = GaussTriangleQuadrature<2>(),
        const LineQuadratureType line_quad = GaussLineQuadrature<1>()
        ):
            settings_(settings),
            src_hgf_(tri_quad, HGF()),
            src_shgf_(tri_quad, SingularitySubtractedHGF()),
            src_sthgf_(tri_quad, SingularitySubtractedTaylorHGF()),
            src_line_(line_quad)
    {
        src_line_.quadrature_object().set_order(settings_.line_order);
        src_sthgf_.quadrature_object().set_order(settings_.tri_order_near);
        src_shgf_.quadrature_object().set_order(settings_.tri_order_near);
        src_hgf_.quadrature_object().set_order(settings_.tri_order_far);
        return;
    };
 
 
    SrcResult integrate(
        const Complex k,
        const Triangle<2>& src_tri,
        ConstEigRef<EigMatNX<Float, 3>> r_obs
        ) override;
 
 
private:
 
    SrcIntegrationSettings settings_;
 
    SrcQuadrature<TriangleQuadratureType, HGF> src_hgf_;
    SrcSingularity<TriangleQuadratureType, SingularitySubtractedHGF> src_shgf_;
    SrcSingularity<TriangleQuadratureType, SingularitySubtractedTaylorHGF> src_sthgf_;
    SrcLineIntegrator<LineQuadratureType> src_line_;
 
};
 
}
 
#include "rwg/integrators/src/strategic.tpp"
 
#endif