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G4JLeicVTXSteppingAction.cc
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G4JLeicVTXSteppingAction.cc
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#include "G4JLeicVTXSteppingAction.h"
#include "G4JLeicVTXDetector.h"
#include <g4detectors/PHG4StepStatusDecode.h>
#include <g4main/PHG4Hit.h>
#include <g4main/PHG4HitContainer.h>
#include <g4main/PHG4Hitv1.h>
#include <g4main/PHG4Shower.h>
#include <g4main/PHG4SteppingAction.h> // for PHG4SteppingAction
#include <g4main/PHG4TrackUserInfoV1.h>
#include <phool/getClass.h>
#include <TSystem.h>
#include <Geant4/G4ParticleDefinition.hh> // for G4ParticleDefinition
#include <Geant4/G4ReferenceCountedHandle.hh> // for G4ReferenceCountedHandle
#include <Geant4/G4Step.hh>
#include <Geant4/G4StepPoint.hh> // for G4StepPoint
#include <Geant4/G4StepStatus.hh> // for fGeomBoundary, fAtRest...
#include <Geant4/G4String.hh> // for G4String
#include <Geant4/G4SystemOfUnits.hh>
#include <Geant4/G4ThreeVector.hh> // for G4ThreeVector
#include <Geant4/G4TouchableHandle.hh> // for G4TouchableHandle
#include <Geant4/G4Track.hh> // for G4Track
#include <Geant4/G4TrackStatus.hh> // for fStopAndKill
#include <Geant4/G4Types.hh> // for G4double
#include <Geant4/G4VPhysicalVolume.hh> // for G4VPhysicalVolume
#include <Geant4/G4VTouchable.hh> // for G4VTouchable
#include <Geant4/G4VUserTrackInformation.hh> // for G4VUserTrackInformation
#include <cmath> // for isfinite
#include <iostream>
#include <string> // for operator<<, string
class PHCompositeNode;
using namespace std;
//____________________________________________________________________________..
G4JLeicVTXSteppingAction::G4JLeicVTXSteppingAction(G4JLeicVTXDetector* detector, const PHParametersContainer* parameters)
: PHG4SteppingAction(detector->GetName())
, m_Detector(detector)
, m_HitContainer(nullptr)
, m_Hit(nullptr)
, m_SaveHitContainer(nullptr)
, m_SaveVolPre(nullptr)
, m_SaveVolPost(nullptr)
, m_SaveTrackId(-1)
, m_SavePreStepStatus(-1)
, m_SavePostStepStatus(-1)
, m_EdepSum(0)
, m_EionSum(0)
{
}
G4JLeicVTXSteppingAction::~G4JLeicVTXSteppingAction()
{
// if the last hit was a zero energie deposit hit, it is just reset
// and the memory is still allocated, so we need to delete it here
// if the last hit was saved, hit is a nullptr pointer which are
// legal to delete (it results in a no operation)
delete m_Hit;
}
//____________________________________________________________________________..
bool G4JLeicVTXSteppingAction::UserSteppingAction(const G4Step* aStep, bool was_used)
{
G4TouchableHandle touch = aStep->GetPreStepPoint()->GetTouchableHandle();
G4TouchableHandle touchpost = aStep->GetPostStepPoint()->GetTouchableHandle();
// get volume of the current step
G4VPhysicalVolume* volume = touch->GetVolume();
// IsInVTX(volume) returns
// == 0 outside of pstof
// > 0 for hits in active volume
// < 0 for hits in passive material
int whichactive = m_Detector->IsInVTX(volume);
if (!whichactive)
{
return false;
}
// collect energy and track length step by step
G4double edep = aStep->GetTotalEnergyDeposit() / GeV;
G4double eion = (aStep->GetTotalEnergyDeposit() - aStep->GetNonIonizingEnergyDeposit()) / GeV;
const G4Track* aTrack = aStep->GetTrack();
int layer_id = whichactive - 1; // layer id is +1 in detector description
bool geantino = false;
// the check for the pdg code speeds things up, I do not want to make
// an expensive string compare for every track when we know
// geantino or chargedgeantino has pid=0
if (aTrack->GetParticleDefinition()->GetPDGEncoding() == 0 &&
aTrack->GetParticleDefinition()->GetParticleName().find("geantino") != string::npos)
{
geantino = true;
}
G4StepPoint* prePoint = aStep->GetPreStepPoint();
G4StepPoint* postPoint = aStep->GetPostStepPoint();
// cout << "track id " << aTrack->GetTrackID() << endl;
// cout << "time prepoint: " << prePoint->GetGlobalTime() << endl;
// cout << "time postpoint: " << postPoint->GetGlobalTime() << endl;
switch (prePoint->GetStepStatus())
{
case fPostStepDoItProc:
if (m_SavePostStepStatus != fGeomBoundary)
{
break;
}
else
{
cout << GetName() << ": New Hit for " << endl;
cout << "prestep status: " << PHG4StepStatusDecode::GetStepStatus(prePoint->GetStepStatus())
<< ", poststep status: " << PHG4StepStatusDecode::GetStepStatus(postPoint->GetStepStatus())
<< ", last pre step status: " << PHG4StepStatusDecode::GetStepStatus(m_SavePreStepStatus)
<< ", last post step status: " << PHG4StepStatusDecode::GetStepStatus(m_SavePostStepStatus) << endl;
cout << "last track: " << m_SaveTrackId
<< ", current trackid: " << aTrack->GetTrackID() << endl;
cout << "phys pre vol: " << volume->GetName()
<< " post vol : " << touchpost->GetVolume()->GetName() << endl;
cout << " previous phys pre vol: " << m_SaveVolPre->GetName()
<< " previous phys post vol: " << m_SaveVolPost->GetName() << endl;
}
case fGeomBoundary:
case fUndefined:
if (!m_Hit)
{
m_Hit = new PHG4Hitv1();
}
m_Hit->set_layer(layer_id);
//here we set the entrance values in cm
m_Hit->set_x(0, prePoint->GetPosition().x() / cm);
m_Hit->set_y(0, prePoint->GetPosition().y() / cm);
m_Hit->set_z(0, prePoint->GetPosition().z() / cm);
// time in ns
m_Hit->set_t(0, prePoint->GetGlobalTime() / nanosecond);
//set the track ID
m_Hit->set_trkid(aTrack->GetTrackID());
m_SaveTrackId = aTrack->GetTrackID();
if (G4VUserTrackInformation* p = aTrack->GetUserInformation())
{
if (PHG4TrackUserInfoV1* pp = dynamic_cast<PHG4TrackUserInfoV1*>(p))
{
m_Hit->set_trkid(pp->GetUserTrackId());
}
}
//set the initial energy deposit
m_EdepSum = 0;
if (whichactive > 0)
{
m_EionSum = 0;
m_Hit->set_eion(0);
m_SaveHitContainer = m_HitContainer;
}
else
{
cout << "implement stuff for whichactive < 0" << endl;
gSystem->Exit(1);
}
if (G4VUserTrackInformation* p = aTrack->GetUserInformation())
{
if (PHG4TrackUserInfoV1* pp = dynamic_cast<PHG4TrackUserInfoV1*>(p))
{
m_Hit->set_trkid(pp->GetUserTrackId());
pp->GetShower()->add_g4hit_id(m_SaveHitContainer->GetID(), m_Hit->get_hit_id());
}
}
break;
default:
break;
}
// some sanity checks for inconsistencies
// check if this hit was created, if not print out last post step status
if (!m_Hit || !isfinite(m_Hit->get_x(0)))
{
cout << GetName() << ": hit was not created" << endl;
cout << "prestep status: " << PHG4StepStatusDecode::GetStepStatus(prePoint->GetStepStatus())
<< ", poststep status: " << PHG4StepStatusDecode::GetStepStatus(postPoint->GetStepStatus())
<< ", last pre step status: " << PHG4StepStatusDecode::GetStepStatus(m_SavePreStepStatus)
<< ", last post step status: " << PHG4StepStatusDecode::GetStepStatus(m_SavePostStepStatus) << endl;
cout << "last track: " << m_SaveTrackId
<< ", current trackid: " << aTrack->GetTrackID() << endl;
cout << "phys pre vol: " << volume->GetName()
<< " post vol : " << touchpost->GetVolume()->GetName() << endl;
cout << " previous phys pre vol: " << m_SaveVolPre->GetName()
<< " previous phys post vol: " << m_SaveVolPost->GetName() << endl;
gSystem->Exit(1);
}
// check if track id matches the initial one when the hit was created
if (aTrack->GetTrackID() != m_SaveTrackId)
{
cout << GetName() << ": hits do not belong to the same track" << endl;
cout << "saved track: " << m_SaveTrackId
<< ", current trackid: " << aTrack->GetTrackID()
<< ", prestep status: " << prePoint->GetStepStatus()
<< ", previous post step status: " << m_SavePostStepStatus
<< endl;
gSystem->Exit(1);
}
m_SavePreStepStatus = prePoint->GetStepStatus();
m_SavePostStepStatus = postPoint->GetStepStatus();
m_SaveVolPre = volume;
m_SaveVolPost = touchpost->GetVolume();
// here we just update the exit values, it will be overwritten
// for every step until we leave the volume or the particle
// ceases to exist
//sum up the energy to get total deposited
m_EdepSum += edep;
if (whichactive > 0)
{
m_EionSum += eion;
}
// if any of these conditions is true this is the last step in
// this volume and we need to save the hit
// postPoint->GetStepStatus() == fGeomBoundary: track leaves this volume
// postPoint->GetStepStatus() == fWorldBoundary: track leaves this world
// (happens when your detector goes outside world volume)
// postPoint->GetStepStatus() == fAtRestDoItProc: track stops (typically
// aTrack->GetTrackStatus() == fStopAndKill is also set)
// aTrack->GetTrackStatus() == fStopAndKill: track ends
if (postPoint->GetStepStatus() == fGeomBoundary ||
postPoint->GetStepStatus() == fWorldBoundary ||
postPoint->GetStepStatus() == fAtRestDoItProc ||
aTrack->GetTrackStatus() == fStopAndKill)
{
// save only hits with energy deposit (or geantino)
if (m_EdepSum > 0 || geantino)
{
// update values at exit coordinates and set keep flag
// of track to keep
m_Hit->set_x(1, postPoint->GetPosition().x() / cm);
m_Hit->set_y(1, postPoint->GetPosition().y() / cm);
m_Hit->set_z(1, postPoint->GetPosition().z() / cm);
m_Hit->set_t(1, postPoint->GetGlobalTime() / nanosecond);
if (G4VUserTrackInformation* p = aTrack->GetUserInformation())
{
if (PHG4TrackUserInfoV1* pp = dynamic_cast<PHG4TrackUserInfoV1*>(p))
{
pp->SetKeep(1); // we want to keep the track
}
}
if (geantino)
{
m_Hit->set_edep(-1); // only energy=0 g4hits get dropped, this way geantinos survive the g4hit compression
if (whichactive > 0)
{
m_Hit->set_eion(-1);
}
}
else
{
m_Hit->set_edep(m_EdepSum);
}
if (whichactive > 0)
{
m_Hit->set_eion(m_EionSum);
}
m_SaveHitContainer->AddHit(layer_id, m_Hit);
// ownership has been transferred to container, set to null
// so we will create a new hit for the next track
m_Hit = nullptr;
}
else
{
// if this hit has no energy deposit, just reset it for reuse
// this means we have to delete it in the dtor. If this was
// the last hit we processed the memory is still allocated
m_Hit->Reset();
}
}
// return true to indicate the hit was used
return true;
}
//____________________________________________________________________________..
void G4JLeicVTXSteppingAction::SetInterfacePointers(PHCompositeNode* topNode)
{
string hitnodename;
if (m_Detector->SuperDetector() != "NONE")
{
hitnodename = "G4HIT_" + m_Detector->SuperDetector();
}
else
{
hitnodename = "G4HIT_" + m_Detector->GetName();
}
//now look for the map and grab a pointer to it.
m_HitContainer = findNode::getClass<PHG4HitContainer>(topNode, hitnodename);
// if we do not find the node we need to make it.
if (!m_HitContainer)
{
std::cout << "G4JLeicVTXSteppingAction::SetTopNode - unable to find " << hitnodename << std::endl;
}
}