REMORA_InitAnalyticZeta_DogboneAnalytic.H

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    mf_zeta.setVal(zero);
 
    for (MFIter mfi(mf_zeta, TilingIfNotGPU()); mfi.isValid(); ++mfi)
    {
        const Box &bx = mfi.growntilebox(IntVect(1,1,0));
 
        Array4<      Real> const& zeta = mf_zeta.array(mfi);
        Array4<const Real> const& x_r  = remora.vec_xr[lev]->const_array(mfi);
 
        ParallelFor(bx, 3, [=] AMREX_GPU_DEVICE(int i, int j, int , int n) noexcept
        {
            if (x_r(i,j,0) < Real(1100.0)) {
                zeta(i,j,0,n) = Real(-0.00125) * (x_r(i,j,0) - Real(100.0)) + Real(1.25);
            }
        });
    }