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#ifndef WARPX_FINITE_DIFFERENCE_SOLVER_H_
#define WARPX_FINITE_DIFFERENCE_SOLVER_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 >;
using ConstVectorField = std::array< std::unique_ptr<amrex::MultiFab const>, 3 >;
// Constructor
void FiniteDifferenceSolver::FiniteDifferenceSolver ( std::array<Real,3> cell_size ) {
// Select algorithm (The choice of algorithm is a runtime option,
// but we compile code for each algorithm, using templates)
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,
ConstVectorField Efield,
amrex::Real dt ) const;
};
private:
int 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 fdtd_algo >
void EvolveBwithAlgo ( VectorField Bfield,
ConstVectorField Efield,
amrex::Real dt ) const;
};
#endif // WARPX_FINITE_DIFFERENCE_SOLVER_H_
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