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/* Copyright 2019-2020 Andrew Myers, Burlen Loring, Luca Fedeli
* Maxence Thevenet, Remi Lehe, Revathi Jambunathan
* Revathi Jambunathan
*
* This file is part of WarpX.
*
* License: BSD-3-Clause-LBNL
*/
#include <WarpXUtil.H>
#include <WarpXConst.H>
#include <AMReX_ParmParse.H>
#include <WarpX.H>
#include <cmath>
#include <fstream>
using namespace amrex;
void ReadBoostedFrameParameters(Real& gamma_boost, Real& beta_boost,
Vector<int>& boost_direction)
{
ParmParse pp("warpx");
pp.query("gamma_boost", gamma_boost);
if( gamma_boost > 1. ) {
beta_boost = std::sqrt(1.-1./pow(gamma_boost,2));
std::string s;
pp.get("boost_direction", s);
if (s == "x" || s == "X") {
boost_direction[0] = 1;
}
#if (AMREX_SPACEDIM == 3)
else if (s == "y" || s == "Y") {
boost_direction[1] = 1;
}
#endif
else if (s == "z" || s == "Z") {
boost_direction[2] = 1;
}
else {
const std::string msg = "Unknown boost_dir: "+s;
Abort(msg.c_str());
}
AMREX_ALWAYS_ASSERT_WITH_MESSAGE( s == "z" || s == "Z" ,
"The boost must be in the z direction.");
}
}
void ConvertLabParamsToBoost()
{
Real gamma_boost = 1., beta_boost = 0.;
int max_level = 0;
Vector<int> boost_direction {0,0,0};
ReadBoostedFrameParameters(gamma_boost, beta_boost, boost_direction);
if (gamma_boost <= 1.) return;
Vector<Real> prob_lo(AMREX_SPACEDIM);
Vector<Real> prob_hi(AMREX_SPACEDIM);
Vector<Real> fine_tag_lo(AMREX_SPACEDIM);
Vector<Real> fine_tag_hi(AMREX_SPACEDIM);
Vector<Real> slice_lo(AMREX_SPACEDIM);
Vector<Real> slice_hi(AMREX_SPACEDIM);
ParmParse pp_geom("geometry");
ParmParse pp_wpx("warpx");
ParmParse pp_amr("amr");
ParmParse pp_slice("slice");
pp_geom.getarr("prob_lo",prob_lo,0,AMREX_SPACEDIM);
BL_ASSERT(prob_lo.size() == AMREX_SPACEDIM);
pp_geom.getarr("prob_hi",prob_hi,0,AMREX_SPACEDIM);
BL_ASSERT(prob_hi.size() == AMREX_SPACEDIM);
pp_slice.queryarr("dom_lo",slice_lo,0,AMREX_SPACEDIM);
BL_ASSERT(slice_lo.size() == AMREX_SPACEDIM);
pp_slice.queryarr("dom_hi",slice_hi,0,AMREX_SPACEDIM);
BL_ASSERT(slice_hi.size() == AMREX_SPACEDIM);
pp_amr.query("max_level", max_level);
if (max_level > 0){
pp_wpx.getarr("fine_tag_lo", fine_tag_lo);
pp_wpx.getarr("fine_tag_hi", fine_tag_hi);
}
#if (AMREX_SPACEDIM == 3)
Vector<int> dim_map {0, 1, 2};
#else
Vector<int> dim_map {0, 2};
#endif
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim)
{
if (boost_direction[dim_map[idim]]) {
amrex::Real convert_factor;
// Assume that the window travels with speed +c
convert_factor = 1./( gamma_boost * ( 1 - beta_boost ) );
prob_lo[idim] *= convert_factor;
prob_hi[idim] *= convert_factor;
if (max_level > 0){
fine_tag_lo[idim] *= convert_factor;
fine_tag_hi[idim] *= convert_factor;
}
slice_lo[idim] *= convert_factor;
slice_hi[idim] *= convert_factor;
break;
}
}
pp_geom.addarr("prob_lo", prob_lo);
pp_geom.addarr("prob_hi", prob_hi);
if (max_level > 0){
pp_wpx.addarr("fine_tag_lo", fine_tag_lo);
pp_wpx.addarr("fine_tag_hi", fine_tag_hi);
}
pp_slice.addarr("dom_lo",slice_lo);
pp_slice.addarr("dom_hi",slice_hi);
}
/* \brief Function that sets the value of MultiFab MF to zero for z between
* zmin and zmax.
*/
void NullifyMF(amrex::MultiFab& mf, int lev, amrex::Real zmin, amrex::Real zmax){
BL_PROFILE("WarpX::NullifyMF()");
#ifdef _OPENMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for(amrex::MFIter mfi(mf, amrex::TilingIfNotGPU()); mfi.isValid(); ++mfi){
const amrex::Box& bx = mfi.tilebox();
// Get box lower and upper physical z bound, and dz
const amrex::Real zmin_box = WarpX::LowerCorner(bx, lev)[2];
const amrex::Real zmax_box = WarpX::UpperCorner(bx, lev)[2];
amrex::Real dz = WarpX::CellSize(lev)[2];
// Get box lower index in the z direction
#if (AMREX_SPACEDIM==3)
const int lo_ind = bx.loVect()[2];
#else
const int lo_ind = bx.loVect()[1];
#endif
// Check if box intersect with [zmin, zmax]
if ( (zmax>zmin_box && zmin<=zmax_box) ){
Array4<Real> arr = mf[mfi].array();
// Set field to 0 between zmin and zmax
ParallelFor(bx,
[=] AMREX_GPU_DEVICE(int i, int j, int k) noexcept{
#if (AMREX_SPACEDIM==3)
const Real z_gridpoint = zmin_box+(k-lo_ind)*dz;
#else
const Real z_gridpoint = zmin_box+(j-lo_ind)*dz;
#endif
if ( (z_gridpoint >= zmin) && (z_gridpoint < zmax) ) {
arr(i,j,k) = 0.;
};
}
);
}
}
}
namespace WarpXUtilIO{
bool WriteBinaryDataOnFile(std::string filename, const amrex::Vector<char>& data)
{
std::ofstream of{filename, std::ios::binary};
of.write(data.data(), data.size());
of.close();
return of.good();
}
}
void Store_parserString(amrex::ParmParse& pp, std::string query_string,
std::string& stored_string)
{
char cstr[query_string.size()+1];
strcpy(cstr, query_string.c_str());
std::vector<std::string> f;
pp.getarr(cstr, f);
stored_string.clear();
for (auto const& s : f) {
stored_string += s;
}
f.clear();
}
WarpXParser makeParser (std::string const& parse_function)
{
WarpXParser parser(parse_function);
parser.registerVariables({"x","y","z","t"});
ParmParse pp("my_constants");
std::set<std::string> symbols = parser.symbols();
symbols.erase("x");
symbols.erase("y");
symbols.erase("z");
symbols.erase("t");
for (auto it = symbols.begin(); it != symbols.end(); ) {
Real v;
if (pp.query(it->c_str(), v)) {
parser.setConstant(*it, v);
it = symbols.erase(it);
} else {
++it;
}
}
for (auto const& s : symbols) {
amrex::Abort("makeParser::Unknown symbol "+s);
}
return parser;
}
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