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SimFieldUtils.cxx
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43 lines (39 loc) · 1.82 KB
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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
#include <DetectorsBase/SimFieldUtils.h>
#include <Field/MagneticField.h>
#include <Field/ALICE3MagneticField.h>
#include <SimConfig/SimConfig.h>
#include <CCDB/BasicCCDBManager.h>
#include <DataFormatsParameters/GRPMagField.h>
using namespace o2::base;
FairField* const SimFieldUtils::createMagField()
{
if (getenv("ALICE3_SIM_FIELD")) {
return new o2::field::ALICE3MagneticField();
}
auto& confref = o2::conf::SimConfig::Instance();
// a) take field from CDDB
const auto fieldmode = confref.getConfigData().mFieldMode;
o2::field::MagneticField* field = nullptr;
if (fieldmode == o2::conf::SimFieldMode::kCCDB) {
LOG(info) << "Fetching magnetic field from CCDB";
auto& ccdb = o2::ccdb::BasicCCDBManager::instance();
auto grpmagfield = ccdb.get<o2::parameters::GRPMagField>("GLO/Config/GRPMagField");
// TODO: clarify if we need to pass other params such as beam energy/type etc.
field = o2::field::MagneticField::createFieldMap(grpmagfield->getL3Current(), grpmagfield->getDipoleCurrent(), grpmagfield->getFieldUniformity());
}
// b) using the given values on the command line
else {
field = o2::field::MagneticField::createNominalField(confref.getConfigData().mField, confref.getConfigData().mFieldMode == o2::conf::SimFieldMode::kUniform);
}
return field;
}