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/* Copyright 2019-2020 Maxence Thevenet
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#ifndef GUARDCELLMANAGER_H_
#define GUARDCELLMANAGER_H_
#include <AMReX_IntVect.H>
/**
* \brief This class computes and stores the number of guard cells needed for
* the allocation of the MultiFabs and required for each part of the PIC loop.
*/
class guardCellManager{
public:
/**
* \brief Initialize number of guard cells depending on the options used.
*
* \param do_subcycling bool, whether to use subcycling
* \param do_fdtd_nci_corr bool, whether to use Godfrey NCI corrector
* \param do_nodal bool, whether the field solver is nodal
* \param do_moving_window bool, whether to use moving window
* \param aux_is_nodal bool, true if the aux grid is nodal
* \param moving_window_dir direction of moving window
* \param nox order of current deposition
* \param nox_fft order of PSATD in x direction
* \param noy_fft order of PSATD in y direction
* \param noz_fft order of PSATD in z direction
* \param nci_corr_stencil stencil of NCI corrector
* \param maxwell_fdtd_solver_id if of Maxwell solver
* \param max_level max level of the simulation
*/
void Init(
const bool do_subcycling,
const bool do_fdtd_nci_corr,
const bool do_nodal,
const bool do_moving_window,
const bool aux_is_nodal,
const int moving_window_dir,
const int nox,
const int nox_fft, const int noy_fft, const int noz_fft,
const int nci_corr_stencil,
const int maxwell_fdtd_solver_id,
const int max_level,
const amrex::Array<amrex::Real,3> v_galilean,
const bool safe_guard_cells);
// Guard cells allocated for MultiFabs E and B
amrex::IntVect ng_alloc_EB = amrex::IntVect::TheZeroVector();
// Guard cells allocated for MultiFab J
amrex::IntVect ng_alloc_J = amrex::IntVect::TheZeroVector();
// Guard cells allocated for MultiFab Rho
amrex::IntVect ng_alloc_Rho = amrex::IntVect::TheZeroVector();
// Guard cells allocated for MultiFab F
amrex::IntVect ng_alloc_F = amrex::IntVect::TheZeroVector();
// Guard cells exchanged for specific parts of the PIC loop
// Number of guard cells of E and B that must exchanged before Field Solver
amrex::IntVect ng_FieldSolver = amrex::IntVect::TheZeroVector();
// Number of guard cells of F that must exchanged before Field Solver
amrex::IntVect ng_FieldSolverF = amrex::IntVect::TheZeroVector();
// Number of guard cells of E and B that must exchanged before Field Gather
amrex::IntVect ng_FieldGather = amrex::IntVect::TheZeroVector();
// Number of guard cells of E and B that must exchanged before updating the Aux grid
amrex::IntVect ng_UpdateAux = amrex::IntVect::TheZeroVector();
// Number of guard cells of all MultiFabs that must exchanged before moving window
amrex::IntVect ng_MovingWindow = amrex::IntVect::TheZeroVector();
// When the auxiliary grid is nodal but the field solver is staggered
// (typically with momentum-conserving gather with FDTD Yee solver),
// An extra guard cell is needed on the fine grid to do the interpolation
// for E and B.
amrex::IntVect ng_Extra = amrex::IntVect::TheZeroVector();
};
#endif // GUARDCELLMANAGER_H_
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