gram.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_OPS_GRAM_H
#define BEM_RWG_OPS_GRAM_H
 
#include "types.hpp"
#include "constants.hpp"
 
#include "geometry/primitives/triangle.hpp"
#include "quadrature/triangle/gauss.hpp"
 
#include "rwg/operators/base.hpp"
 
 
namespace bem::rwg
{
 
template <typename TriangleQuadratureType = GaussTriangleQuadrature<3>>
class RwgRwgOp: public OperatorBase<3, 3>
{
 
    static_assert(
        std::is_base_of<TriangleQuadratureBase<3>, TriangleQuadratureType>::value,
        "RwgRwgOp: `TriangleQuadratureType` must derive from `TriangleQuadratureBase<3>`"
        );
 
public:
 
    RwgRwgOp(const TriangleQuadratureType tri_quad = GaussTriangleQuadrature<3>()):
        tri_quad_(tri_quad) {};
 
 
    EigMatMN<Complex, 3, 3> compute(
        const Complex k,
        const Triangle<3>& obs_tri,
        const Triangle<3>& src_tri
        ) override;
 
 
private:
 
    TriangleQuadratureType tri_quad_;
 
};
 
 
template <typename TriangleQuadratureType = GaussTriangleQuadrature<3>>
class RotRwgRwgOp: public OperatorBase<3, 3>
{
 
    static_assert(
        std::is_base_of<TriangleQuadratureBase<3>, TriangleQuadratureType>::value,
        "RotRwgRwgOp: `TriangleQuadratureType` must derive from `TriangleQuadratureBase<3>`"
        );
 
public:
 
    RotRwgRwgOp(const TriangleQuadratureType tri_quad = GaussTriangleQuadrature<3>()):
        tri_quad_(tri_quad) {};
 
 
    EigMatMN<Complex, 3, 3> compute(
        const Complex k,
        const Triangle<3>& obs_tri,
        const Triangle<3>& src_tri
        ) override;
 
 
private:
 
    TriangleQuadratureType tri_quad_;
 
};
 
}
 
#include "rwg/operators/gram.tpp"
 
#endif