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Generator.cxx
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257 lines (212 loc) · 7.17 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.
/// \author R+Preghenella - August 2017
#include "Generators/Generator.h"
#include "Generators/Trigger.h"
#include "Generators/PrimaryGenerator.h"
#include "SimulationDataFormat/MCEventHeader.h"
#include "SimulationDataFormat/ParticleStatus.h"
#include "SimulationDataFormat/MCGenProperties.h"
#include "FairPrimaryGenerator.h"
#include <fairlogger/Logger.h>
#include <cmath>
#include "TClonesArray.h"
#include "TParticle.h"
namespace o2
{
namespace eventgen
{
std::atomic<int> Generator::InstanceCounter{0};
unsigned int Generator::gTotalNEvents = 0;
/*****************************************************************/
/*****************************************************************/
Generator::Generator() : FairGenerator("ALICEo2", "ALICEo2 Generator"),
mBoost(0.)
{
/** default constructor **/
mThisInstanceID = Generator::InstanceCounter;
Generator::InstanceCounter++;
}
/*****************************************************************/
Generator::Generator(const Char_t* name, const Char_t* title) : FairGenerator(name, title),
mBoost(0.)
{
/** constructor **/
mThisInstanceID = Generator::InstanceCounter;
Generator::InstanceCounter++;
}
/*****************************************************************/
Bool_t
Generator::Init()
{
/** init **/
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
Generator::ReadEvent(FairPrimaryGenerator* primGen)
{
/** read event **/
/** endless generate-and-trigger loop **/
while (true) {
mReadEventCounter++;
/** clear particle vector **/
mParticles.clear();
/** reset the sub-generator ID **/
mSubGeneratorId = -1;
/** generate event **/
if (!generateEvent()) {
LOG(error) << "ReadEvent failed in generateEvent";
return kFALSE;
}
/** import particles **/
if (!importParticles()) {
LOG(error) << "ReadEvent failed in importParticles";
return kFALSE;
}
if (mSubGeneratorsIdToDesc.empty() && mSubGeneratorId > -1) {
LOG(fatal) << "ReadEvent failed because no SubGenerator description given";
}
if (!mSubGeneratorsIdToDesc.empty() && mSubGeneratorId < 0) {
LOG(fatal) << "ReadEvent failed because SubGenerator description given but sub-generator not set";
}
/** trigger event **/
if (triggerEvent()) {
mTriggerOkHook(mParticles, mReadEventCounter);
break;
} else {
mTriggerFalseHook(mParticles, mReadEventCounter);
}
}
/** add tracks **/
if (!addTracks(primGen)) {
LOG(error) << "ReadEvent failed in addTracks";
return kFALSE;
}
/** update header **/
auto header = primGen->GetEvent();
auto o2header = dynamic_cast<o2::dataformats::MCEventHeader*>(header);
if (!header) {
LOG(fatal) << "MC event header is not a 'o2::dataformats::MCEventHeader' object";
return kFALSE;
}
updateHeader(o2header);
updateSubGeneratorInformation(o2header);
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
Generator::addTracks(FairPrimaryGenerator* primGen)
{
/** add tracks **/
auto o2primGen = dynamic_cast<PrimaryGenerator*>(primGen);
if (!o2primGen) {
LOG(fatal) << "PrimaryGenerator is not a o2::eventgen::PrimaryGenerator";
return kFALSE;
}
/** loop over particles **/
for (const auto& particle : mParticles) {
o2primGen->AddTrack(particle.GetPdgCode(),
particle.Px() * mMomentumUnit,
particle.Py() * mMomentumUnit,
particle.Pz() * mMomentumUnit,
particle.Vx() * mPositionUnit,
particle.Vy() * mPositionUnit,
particle.Vz() * mPositionUnit,
particle.GetMother(0),
particle.GetMother(1),
particle.GetDaughter(0),
particle.GetDaughter(1),
particle.TestBit(ParticleStatus::kToBeDone),
particle.Energy() * mEnergyUnit,
particle.T() * mTimeUnit,
particle.GetWeight(),
(TMCProcess)particle.GetUniqueID(),
particle.GetStatusCode()); // generator status information passed as status code field
}
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
Generator::boostEvent()
{
/** boost event **/
/** success **/
return kTRUE;
}
/*****************************************************************/
Bool_t
Generator::triggerEvent()
{
/** trigger event **/
/** check trigger presence **/
if (mTriggers.size() == 0 && mDeepTriggers.size() == 0) {
return kTRUE;
}
/** check trigger mode **/
Bool_t triggered;
if (mTriggerMode == kTriggerOFF) {
return kTRUE;
} else if (mTriggerMode == kTriggerOR) {
triggered = kFALSE;
} else if (mTriggerMode == kTriggerAND) {
triggered = kTRUE;
} else {
return kTRUE;
}
/** loop over triggers **/
for (const auto& trigger : mTriggers) {
auto retval = trigger(mParticles);
if (mTriggerMode == kTriggerOR) {
triggered |= retval;
}
if (mTriggerMode == kTriggerAND) {
triggered &= retval;
}
}
/** loop over deep triggers **/
for (const auto& trigger : mDeepTriggers) {
auto retval = trigger(mInterface, mInterfaceName);
if (mTriggerMode == kTriggerOR) {
triggered |= retval;
}
if (mTriggerMode == kTriggerAND) {
triggered &= retval;
}
}
/** return **/
return triggered;
}
/*****************************************************************/
void Generator::addSubGenerator(int subGeneratorId, std::string const& subGeneratorDescription)
{
if (subGeneratorId < 0) {
LOG(fatal) << "Sub-generator IDs must be >= 0, instead, passed value is " << subGeneratorId;
}
mSubGeneratorsIdToDesc.insert({subGeneratorId, subGeneratorDescription});
}
/*****************************************************************/
void Generator::updateSubGeneratorInformation(o2::dataformats::MCEventHeader* header) const
{
if (mSubGeneratorId < 0) {
return;
}
header->putInfo<int>(o2::mcgenid::GeneratorProperty::SUBGENERATORID, mSubGeneratorId);
header->putInfo<std::unordered_map<int, std::string>>(o2::mcgenid::GeneratorProperty::SUBGENERATORDESCRIPTIONMAP, mSubGeneratorsIdToDesc);
}
/*****************************************************************/
/*****************************************************************/
} /* namespace eventgen */
} /* namespace o2 */
ClassImp(o2::eventgen::Generator);