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#include <limits>
#include <random>
#include <AMReX.H>
#include <AMReX_ParmParse.H>
#include <AMReX_Vector.H>
#include <AMReX_MultiFab.H>
#include <AMReX_MultiFabUtil.H>
#include <AMReX_PlotFileUtil.H>
#include <WarpXConst.H>
#include <WarpX_f.H>
using namespace amrex;
int main(int argc, char* argv[])
{
amrex::Initialize(argc,argv);
{
long nox=1, noy=1, noz=1;
{
ParmParse pp("interpolation");
pp.query("nox", nox);
pp.query("noy", noy);
pp.query("noz", noz);
if (nox != noy || nox != noz) {
amrex::Abort("warpx.nox, noy and noz must be equal");
}
if (nox < 1) {
amrex::Abort("warpx.nox must >= 1");
}
}
std::mt19937 rand_eng(42);
std::uniform_real_distribution<Real> rand_dis(0.0,1.0);
long nx = 64, ny = 64, nz = 64;
Real dx[3] = {1.0/nx, 1.0/ny, 1.0/nz};
Real dt = 1.e-6;
Box cc_domain{IntVect{D_DECL(0,0,0)},IntVect{D_DECL(nx-1,ny-1,nz-1)}};
BoxArray grids{cc_domain};
grids.maxSize(32);
DistributionMapping dmap {grids};
const int ng = nox;
#if (BL_SPACEDIM == 3)
IntVect Bx_nodal_flag(1,0,0);
IntVect By_nodal_flag(0,1,0);
IntVect Bz_nodal_flag(0,0,1);
#elif (BL_SPACEDIM == 2)
IntVect Bx_nodal_flag(1,0); // x is the first dimension to AMReX
IntVect By_nodal_flag(0,0); // y is the missing dimension to 2D AMReX
IntVect Bz_nodal_flag(0,1); // z is the second dimension to 2D AMReX
#endif
#if (BL_SPACEDIM == 3)
IntVect Ex_nodal_flag(0,1,1);
IntVect Ey_nodal_flag(1,0,1);
IntVect Ez_nodal_flag(1,1,0);
#elif (BL_SPACEDIM == 2)
IntVect Ex_nodal_flag(0,1); // x is the first dimension to AMReX
IntVect Ey_nodal_flag(1,1); // y is the missing dimension to 2D AMReX
IntVect Ez_nodal_flag(1,0); // z is the second dimension to 2D AMReX
#endif
#if (BL_SPACEDIM == 3)
IntVect jx_nodal_flag(0,1,1);
IntVect jy_nodal_flag(1,0,1);
IntVect jz_nodal_flag(1,1,0);
#elif (BL_SPACEDIM == 2)
IntVect jx_nodal_flag(0,1); // x is the first dimension to AMReX
IntVect jy_nodal_flag(1,1); // y is the missing dimension to 2D AMReX
IntVect jz_nodal_flag(1,0); // z is the second dimension to 2D AMReX
#endif
Vector<std::unique_ptr<MultiFab> > current(3);
Vector<std::unique_ptr<MultiFab> > Efield(3);
Vector<std::unique_ptr<MultiFab> > Bfield(3);
// Create the MultiFabs for B
Bfield[0].reset( new MultiFab(amrex::convert(grids,Bx_nodal_flag),dmap,1,ng));
Bfield[1].reset( new MultiFab(amrex::convert(grids,By_nodal_flag),dmap,1,ng));
Bfield[2].reset( new MultiFab(amrex::convert(grids,Bz_nodal_flag),dmap,1,ng));
// Create the MultiFabs for E
Efield[0].reset( new MultiFab(amrex::convert(grids,Ex_nodal_flag),dmap,1,ng));
Efield[1].reset( new MultiFab(amrex::convert(grids,Ey_nodal_flag),dmap,1,ng));
Efield[2].reset( new MultiFab(amrex::convert(grids,Ez_nodal_flag),dmap,1,ng));
// Create the MultiFabs for the current
current[0].reset( new MultiFab(amrex::convert(grids,jx_nodal_flag),dmap,1,ng));
current[1].reset( new MultiFab(amrex::convert(grids,jy_nodal_flag),dmap,1,ng));
current[2].reset( new MultiFab(amrex::convert(grids,jz_nodal_flag),dmap,1,ng));
Bfield[0]->setVal(0.0);
Bfield[1]->setVal(0.0);
Bfield[2]->setVal(0.0);
Efield[0]->setVal(0.0);
Efield[1]->setVal(0.0);
Efield[2]->setVal(0.0);
current[0]->setVal(0.0);
current[1]->setVal(0.0);
current[2]->setVal(0.0);
for (MFIter mfi(*current[0]); mfi.isValid(); ++mfi)
{
const Box& bx = mfi.validbox();
FArrayBox& exfab = (*Efield [0])[mfi];
FArrayBox& eyfab = (*Efield [1])[mfi];
FArrayBox& ezfab = (*Efield [2])[mfi];
FArrayBox& bxfab = (*Bfield [0])[mfi];
FArrayBox& byfab = (*Bfield [1])[mfi];
FArrayBox& bzfab = (*Bfield [2])[mfi];
FArrayBox& jxfab = (*current[0])[mfi];
FArrayBox& jyfab = (*current[1])[mfi];
FArrayBox& jzfab = (*current[2])[mfi];
for (IntVect cell=bx.smallEnd(); cell <= bx.bigEnd(); bx.next(cell))
{
exfab(cell) = rand_dis(rand_eng)*1.e5;
eyfab(cell) = rand_dis(rand_eng)*1.e5;
ezfab(cell) = rand_dis(rand_eng)*1.e5;
bxfab(cell) = rand_dis(rand_eng)*1.e-5;
byfab(cell) = rand_dis(rand_eng)*1.e-5;
bzfab(cell) = rand_dis(rand_eng)*1.e-5;
jxfab(cell) = rand_dis(rand_eng)*1.e10;
jyfab(cell) = rand_dis(rand_eng)*1.e10;
jzfab(cell) = rand_dis(rand_eng)*1.e10;
}
}
{ // Evolve B
Real dtsdx[3];
#if (BL_SPACEDIM == 3)
dtsdx[0] = dt / dx[0];
dtsdx[1] = dt / dx[1];
dtsdx[2] = dt / dx[2];
#elif (BL_SPACEDIM == 2)
dtsdx[0] = dt / dx[0];
dtsdx[1] = std::numeric_limits<Real>::quiet_NaN();
dtsdx[2] = dt / dx[1];
#endif
const int norder = 2;
// FDT Yee solver
const int maxwell_fdtd_solver_id = 0;
for ( MFIter mfi(*Bfield[0],true); mfi.isValid(); ++mfi )
{
const Box& tbx = mfi.tilebox(Bx_nodal_flag);
const Box& tby = mfi.tilebox(By_nodal_flag);
const Box& tbz = mfi.tilebox(Bz_nodal_flag);
// Call picsar routine for each tile
warpx_push_bvec(
tbx.loVect(), tbx.hiVect(),
tby.loVect(), tby.hiVect(),
tbz.loVect(), tbz.hiVect(),
BL_TO_FORTRAN_3D((*Efield[0])[mfi]),
BL_TO_FORTRAN_3D((*Efield[1])[mfi]),
BL_TO_FORTRAN_3D((*Efield[2])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[0])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[1])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[2])[mfi]),
&dtsdx[0], &dtsdx[1], &dtsdx[2],
&maxwell_fdtd_solver_id);
}
}
{ // evolve E
Real mu_c2_dt = (PhysConst::mu0*PhysConst::c*PhysConst::c) * dt;
Real dtsdx_c2[3];
#if (BL_SPACEDIM == 3)
dtsdx_c2[0] = (PhysConst::c*PhysConst::c) * dt / dx[0];
dtsdx_c2[1] = (PhysConst::c*PhysConst::c) * dt / dx[1];
dtsdx_c2[2] = (PhysConst::c*PhysConst::c) * dt / dx[2];
#else
dtsdx_c2[0] = (PhysConst::c*PhysConst::c) * dt / dx[0];
dtsdx_c2[1] = std::numeric_limits<Real>::quiet_NaN();
dtsdx_c2[2] = (PhysConst::c*PhysConst::c) * dt / dx[1];
#endif
const int norder = 2;
for ( MFIter mfi(*Efield[0],true); mfi.isValid(); ++mfi )
{
const Box& tex = mfi.tilebox(Ex_nodal_flag);
const Box& tey = mfi.tilebox(Ey_nodal_flag);
const Box& tez = mfi.tilebox(Ez_nodal_flag);
// Call picsar routine for each tile
warpx_push_evec(
tex.loVect(), tex.hiVect(),
tey.loVect(), tey.hiVect(),
tez.loVect(), tez.hiVect(),
BL_TO_FORTRAN_3D((*Efield[0])[mfi]),
BL_TO_FORTRAN_3D((*Efield[1])[mfi]),
BL_TO_FORTRAN_3D((*Efield[2])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[0])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[1])[mfi]),
BL_TO_FORTRAN_3D((*Bfield[2])[mfi]),
BL_TO_FORTRAN_3D((*current[0])[mfi]),
BL_TO_FORTRAN_3D((*current[1])[mfi]),
BL_TO_FORTRAN_3D((*current[2])[mfi]),
&mu_c2_dt,
&dtsdx_c2[0], &dtsdx_c2[1], &dtsdx_c2[2]);
}
}
MultiFab plotmf(grids, dmap, 6, 0);
amrex::average_edge_to_cellcenter(plotmf, 0, amrex::GetVecOfConstPtrs(Efield));
amrex::average_face_to_cellcenter(plotmf, 3, amrex::GetVecOfConstPtrs(Bfield));
Real xyzmin[3] = {0.0,0.0,0.0};
RealBox realbox{cc_domain, dx, xyzmin};
int is_per[3] = {0,0,0};
Geometry geom{cc_domain, &realbox, 0, is_per};
std::string plotname{"plotfiles/plt00000"};
Vector<std::string> varnames{"Ex", "Ey", "Ez", "Bx", "By", "Bz"};
amrex::WriteSingleLevelPlotfile(plotname, plotmf, varnames, geom, 0.0, 0);
}
amrex::Finalize();
}
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