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#ifndef WARPX_SPECTRAL_BASE_ALGORITHM_H_
#define WARPX_SPECTRAL_BASE_ALGORITHM_H_
#include <SpectralKSpace.H>
#include <SpectralFieldData.H>
/* \brief Class that updates the field in spectral space
* and stores the coefficients of the corresponding update equation.
*
* `SpectralBaseAlgorithm` is only a base class and cannot be used directly.
* Instead use its subclasses, which implement the specific field update
* equations for a given spectral algorithm.
*/
class SpectralBaseAlgorithm
{
public:
// Virtual member function ; meant to be overridden in subclasses
virtual void pushSpectralFields(SpectralFieldData& f) const = 0;
virtual int getRequiredNumberOfFields() const = 0;
// The destructor should also be a virtual function, so that
// a pointer to subclass of `SpectraBaseAlgorithm` actually
// calls the subclass's destructor.
virtual ~SpectralBaseAlgorithm() {};
protected: // Meant to be used in the subclasses
using SpectralCoefficients = amrex::FabArray< amrex::BaseFab <amrex::Real> >;
// Constructor
SpectralBaseAlgorithm(const SpectralKSpace& spectral_kspace,
const amrex::DistributionMapping& dm,
const int norder_x, const int norder_y,
const int norder_z, const bool nodal)
// Compute and assign the modified k vectors
: modified_kx_vec(spectral_kspace.getModifiedKComponent(dm,0,norder_x,nodal)),
#if (AMREX_SPACEDIM==3)
modified_ky_vec(spectral_kspace.getModifiedKComponent(dm,1,norder_y,nodal)),
modified_kz_vec(spectral_kspace.getModifiedKComponent(dm,2,norder_z,nodal))
#else
modified_kz_vec(spectral_kspace.getModifiedKComponent(dm,1,norder_z,nodal))
#endif
{};
// Modified finite-order vectors
KVectorComponent modified_kx_vec, modified_kz_vec;
#if (AMREX_SPACEDIM==3)
KVectorComponent modified_ky_vec;
#endif
};
#endif // WARPX_SPECTRAL_BASE_ALGORITHM_H_
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