FieldAccessorFunctors.H

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/* Copyright 2020 Revathi Jambunathan
 *
 * This file is part of WarpX.
 *
 * License: BSD-3-Clause-LBNL
 */
 
#ifndef WARPX_FIELD_ACCESSOR_FUNCTORS_H
#define WARPX_FIELD_ACCESSOR_FUNCTORS_H
 
#include <AMReX_Array.H>
#include <AMReX_Extension.H>
#include <AMReX_Gpu.H>

struct FieldAccessorMacroscopic
{
    AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
    FieldAccessorMacroscopic ( amrex::Array4<amrex::Real const> const a_field,
                               amrex::Array4<amrex::Real> const& a_parameter)
        : m_field(a_field), m_parameter(a_parameter) {}

    AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
    amrex::Real operator() (int const i, int const j,
                            int const k, int const ncomp) const noexcept
    {
        return ( m_field(i, j, k, ncomp)  /  m_parameter(i, j, k) ) ;
    }
private:
    amrex::Array4<amrex::Real const> m_field;
    amrex::Array4<amrex::Real const> m_parameter;
};
 
 
#endif