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#ifndef WARPX_FINITE_DIFFERENCE_SOLVER_H_
#define WARPX_FINITE_DIFFERENCE_SOLVER_H_
#include "WarpXAlgorithmSelection.H"
#include "FiniteDifferenceAlgorithms/YeeAlgorithm.H"
#include <AMReX_MultiFab.H>
/**
* \brief Top-level class for the electromagnetic finite-difference solver
*
* TODO
*/
class FiniteDifferenceSolver
{
public:
using VectorField = std::array< std::unique_ptr<amrex::MultiFab>, 3 >;
// Constructor
FiniteDifferenceSolver ( int const fdtd_algo,
std::array<amrex::Real,3> cell_size ) {
// Register the type of finite-difference algorithm
m_fdtd_algo = fdtd_algo;
// Calculate coefficients of finite-difference stencil
if (fdtd_algo == MaxwellSolverAlgo::Yee){
YeeAlgorithm::InitializeStencilCoefficients( cell_size,
stencil_coefs_x, stencil_coefs_y, stencil_coefs_z );
// } else if (fdtd_algo == MaxwellSolverAlgo::CKC) {
// CKCAlgorithm::InitializeStencilCoefficients( cell_size,
// stencil_coefs_x, stencil_coefs_y, stencil_coefs_z );
} else {
amrex::Abort("Unknown algorithm");
}
};
void EvolveB ( VectorField& Bfield,
VectorField const& Efield,
amrex::Real const dt );
private:
int m_fdtd_algo;
amrex::Gpu::ManagedVector<amrex::Real> stencil_coefs_x;
amrex::Gpu::ManagedVector<amrex::Real> stencil_coefs_y;
amrex::Gpu::ManagedVector<amrex::Real> stencil_coefs_z;
template< typename T_Algo >
void EvolveBwithAlgo ( VectorField& Bfield,
VectorField const& Efield,
amrex::Real const dt );
};
#endif // WARPX_FINITE_DIFFERENCE_SOLVER_H_
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