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GeneratorTGenerator.cxx
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135 lines (108 loc) · 4.36 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 "SimulationDataFormat/MCGenProperties.h"
#include "SimulationDataFormat/ParticleStatus.h"
#include "Generators/GeneratorTGenerator.h"
#include "Generators/GeneratorExternalParam.h"
#include <fairlogger/Logger.h>
#include "FairPrimaryGenerator.h"
#include "TGenerator.h"
#include "TClonesArray.h"
#include "TParticle.h"
#include "TMCProcess.h" // for VMC Particle Production Process
namespace o2
{
namespace eventgen
{
/*****************************************************************/
/*****************************************************************/
GeneratorTGenerator::GeneratorTGenerator() : Generator("ALICEo2", "ALICEo2 TGenerator Generator"),
mTGenerator(nullptr),
mCloneParticles(nullptr)
{
/** default constructor **/
mInterface = reinterpret_cast<void*>(mTGenerator);
mInterfaceName = "tgenerator";
mCloneParticles = new TClonesArray("TParticle");
mCloneParticles->SetOwner(kTRUE);
}
/*****************************************************************/
GeneratorTGenerator::GeneratorTGenerator(const Char_t* name, const Char_t* title) : Generator(name, title),
mTGenerator(nullptr),
mCloneParticles(nullptr)
{
/** constructor **/
mInterface = reinterpret_cast<void*>(mTGenerator);
mInterfaceName = "tgenerator";
mCloneParticles = new TClonesArray("TParticle");
mCloneParticles->SetOwner(kTRUE);
}
/*****************************************************************/
GeneratorTGenerator::~GeneratorTGenerator()
{
/** destructor **/
delete mCloneParticles;
}
/*****************************************************************/
Bool_t
GeneratorTGenerator::generateEvent()
{
/** generate event **/
mTGenerator->GenerateEvent();
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
GeneratorTGenerator::importParticles()
{
/** import particles **/
mTGenerator->ImportParticles(mCloneParticles, "All");
auto nparticles = mCloneParticles->GetEntries();
for (Int_t iparticle = 0; iparticle < nparticles; iparticle++) {
auto particle = (TParticle*)mCloneParticles->At(iparticle);
// Some particle comes in from somewhere.
// To support the user and in case the status code is found to be not encoded, do it here,
// assuming that the current code is the HepMC status (like it used to be before).
auto statusCode = particle->GetStatusCode();
if (!mcgenstatus::isEncoded(statusCode)) {
particle->SetStatusCode(mcgenstatus::MCGenStatusEncoding(statusCode, 0).fullEncoding);
}
mParticles.push_back(*particle);
// Set the transport bit according to the HepMC status code as it always used to be
mParticles.back().SetBit(ParticleStatus::kToBeDone, mcgenstatus::getHepMCStatusCode(particle->GetStatusCode()) == 1);
if (GeneratorExternalParam::Instance().markAllAsPrimary) {
// The production process will be set to kPPrimary which is the expected default for generator-level particles in O2
// not doing this might confuse transport and selection of particles to keep in AOD
mParticles.back().SetUniqueID(kPPrimary);
}
}
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
GeneratorTGenerator::Init()
{
/** init **/
/** init base class **/
Generator::Init();
if (!mTGenerator) {
LOG(fatal) << "No TGenerator inteface assigned" << std::endl;
return kFALSE;
}
/** success **/
return kTRUE;
}
/*****************************************************************/
/*****************************************************************/
} /* namespace eventgen */
} /* namespace o2 */