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#include "BreitWheelerEngineWrapper.H"
#include "QedTableParserHelperFunctions.H"
#include <utility>
using namespace std;
using namespace QedUtils;
using namespace amrex;
//This file provides a wrapper aroud the breit_wheeler engine
//provided by the PICSAR library
// Factory class =============================
BreitWheelerEngine::BreitWheelerEngine (){}
//Builds the functor to initialize the optical depth
BreitWheelerGetOpticalDepth
BreitWheelerEngine::build_optical_depth_functor ()
{
return BreitWheelerGetOpticalDepth();
}
//Builds the functor to evolve the optical depth
BreitWheelerEvolveOpticalDepth
BreitWheelerEngine::build_evolve_functor ()
{
AMREX_ALWAYS_ASSERT(lookup_tables_initialized);
return BreitWheelerEvolveOpticalDepth(&innards);
}
//Builds the functor to generate the pairs
BreitWheelerGeneratePairs
BreitWheelerEngine::build_pair_functor ()
{
AMREX_ALWAYS_ASSERT(lookup_tables_initialized);
return BreitWheelerGeneratePairs(&innards);
}
bool BreitWheelerEngine::are_lookup_tables_initialized () const
{
return lookup_tables_initialized;
}
/* \brief Reads lookup tables from 'file' on disk */
bool
BreitWheelerEngine::init_lookup_tables_from_raw_data (
const Vector<char>& raw_data)
{
const char* p_data = raw_data.data();
const char* const p_last = &raw_data.back();
bool is_ok;
//Header (control parameters)
tie(is_ok, innards.ctrl.chi_phot_min, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_min)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tdndt_min, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tdndt_min)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tdndt_max, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tdndt_max)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tdndt_how_many, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tdndt_how_many)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tpair_min, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tpair_min)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tpair_max, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tpair_max)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_phot_tpair_how_many, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_phot_tpair_how_many)>(
p_data, p_last);
if(!is_ok) return false;
tie(is_ok, innards.ctrl.chi_frac_tpair_how_many, p_data) =
parse_raw_data<decltype(innards.ctrl.chi_frac_tpair_how_many)>(
p_data, p_last);
if(!is_ok) return false;
//___________________________
//Data
Vector<Real> tndt_coords(innards.ctrl.chi_phot_tdndt_how_many);
Vector<Real> tndt_data(innards.ctrl.chi_phot_tdndt_how_many);
Vector<Real> cum_tab_coords1(innards.ctrl.chi_phot_tpair_how_many);
Vector<Real> cum_tab_coords2(innards.ctrl.chi_frac_tpair_how_many);
Vector<Real> cum_tab_data(innards.ctrl.chi_phot_tpair_how_many*
innards.ctrl.chi_frac_tpair_how_many);
tie(is_ok, tndt_coords, p_data) =
parse_raw_data_vec<Real>(
p_data, tndt_coords.size(), p_last);
if(!is_ok) return false;
innards.TTfunc_coords.assign(tndt_coords.begin(), tndt_coords.end());
tie(is_ok, tndt_data, p_data) =
parse_raw_data_vec<Real>(
p_data, tndt_data.size(), p_last);
if(!is_ok) return false;
innards.TTfunc_data.assign(tndt_data.begin(), tndt_data.end());
tie(is_ok, cum_tab_coords1, p_data) =
parse_raw_data_vec<Real>(
p_data, cum_tab_coords1.size(), p_last);
if(!is_ok) return false;
innards.cum_distrib_coords_1.assign(
cum_tab_coords1.begin(), cum_tab_coords1.end());
tie(is_ok, cum_tab_coords2, p_data) =
parse_raw_data_vec<Real>(
p_data, cum_tab_coords2.size(), p_last);
if(!is_ok) return false;
innards.cum_distrib_coords_2.assign(
cum_tab_coords2.begin(), cum_tab_coords2.end());
tie(is_ok, cum_tab_data, p_data) =
parse_raw_data_vec<Real>(
p_data, cum_tab_data.size(), p_last);
if(!is_ok) return false;
innards.cum_distrib_data.assign(
cum_tab_data.begin(), cum_tab_data.end());
//___________________________
lookup_tables_initialized = true;
return true;
}
PicsarBreitWheelerCtrl
BreitWheelerEngine::get_default_ctrl() const
{
return PicsarBreitWheelerCtrl();
}
/* \brief Writes lookup tables on disk in 'file'
* return false if it fails. */
Vector<char> BreitWheelerEngine::export_lookup_tables_data () const
{
Vector<char> res{};
if(!lookup_tables_initialized)
return res;
auto add_data_to_buf = [&res](auto data){
res.insert(res.end(),
reinterpret_cast<const char*>(&data),
reinterpret_cast<const char*>(&data) +
sizeof(data));
};
add_data_to_buf(innards.ctrl.chi_phot_min);
add_data_to_buf(innards.ctrl.chi_phot_tdndt_min);
add_data_to_buf(innards.ctrl.chi_phot_tdndt_max);
add_data_to_buf(innards.ctrl.chi_phot_tdndt_how_many);
add_data_to_buf(innards.ctrl.chi_phot_tpair_min);
add_data_to_buf(innards.ctrl.chi_phot_tpair_max);
add_data_to_buf(innards.ctrl.chi_phot_tpair_how_many);
add_data_to_buf(innards.ctrl.chi_frac_tpair_how_many);
auto add_data_to_buf_vv = [&res](const auto* data, size_t how_many){
res.insert(res.end(),
reinterpret_cast<const char*>(data),
reinterpret_cast<const char*>(data) +
sizeof(*data)*how_many);
};
add_data_to_buf_vv(innards.TTfunc_coords.data(), innards.TTfunc_coords.size());
add_data_to_buf_vv(innards.TTfunc_data.data(), innards.TTfunc_data.size());
add_data_to_buf_vv(innards.cum_distrib_coords_1.data(), innards.cum_distrib_coords_1.size());
add_data_to_buf_vv(innards.cum_distrib_coords_2.data(), innards.cum_distrib_coords_2.size());
add_data_to_buf_vv(innards.cum_distrib_data.data(), innards.cum_distrib_data.size());
return res;
}
//Private function which actually computes the lookup tables
void BreitWheelerEngine::compute_lookup_tables (
PicsarBreitWheelerCtrl ctrl)
{
#ifdef WARPX_QED_TABLE_GEN
table_builder.compute_table(ctrl, innards);
lookup_tables_initialized = true;
#endif
}
//============================================
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