G4FastSimHitMaker Class Reference

Helper class for hit creation. More...

#include <G4FastSimHitMaker.hh>

Public Member Functions
	G4FastSimHitMaker ()
	~G4FastSimHitMaker ()
void	make (const G4FastHit &aHit, const G4FastTrack &aTrack)
void	SetNameOfWorldWithSD (const G4String &aName)
void	SetProcess (G4VProcess *proc)

Detailed Description

Helper class for hit creation.

Helper class that can be employed in the fast simulation models. It allows to deposit energy at given position (G4FastHit), provided it is located within the sensitive detector that derives from G4VFastSimSensitiveDetector base class. An extended example extended/parameterisations/Par03 demonstrates how to use G4FastSimHitMaker to create multiple deposits from the fast simulation model.

Definition at line 50 of file G4FastSimHitMaker.hh.

Constructor & Destructor Documentation

G4FastSimHitMaker()

G4FastSimHitMaker::G4FastSimHitMaker

(

)

Definition at line 36 of file G4FastSimHitMaker.cc.

{
  fTouchableHandle = new G4TouchableHistory();
  fpNavigator = new G4Navigator();
  fNaviSetup = false;
  fWorldWithSdName = "";
  fpSpotS = new G4Step();
  fpSpotP = new G4StepPoint();
  // N.B. Pre and Post step points are common.
  fpSpotS->SetPreStepPoint(fpSpotP);
  fpSpotS->SetPostStepPoint(fpSpotP);
}

~G4FastSimHitMaker()

G4FastSimHitMaker::~G4FastSimHitMaker

(

)

Definition at line 51 of file G4FastSimHitMaker.cc.

{
  delete fpNavigator;
  delete fpSpotP;
  fpSpotS->ResetPreStepPoint();
  fpSpotS->ResetPostStepPoint();
  delete fpSpotS;
}

Member Function Documentation

make()

void G4FastSimHitMaker::make	(	const G4FastHit &	aHit,
		const G4FastTrack &	aTrack )

Deposit energy at given position.

Parameters

[in]	aHit	Created hit (energy and position)
[in]	aTrack	Fast track with access to particle's track and properties in envelope's local coordinates

Definition at line 62 of file G4FastSimHitMaker.cc.

{
  // do not make empty deposit
  if (aHit.GetEnergy() <= 0) return;
  // Locate the spot
  if (!fNaviSetup) {
    // Choose the world volume that contains the sensitive detector based on its
    // name (empty name for mass geometry)
    G4VPhysicalVolume* worldWithSD = nullptr;
    if (fWorldWithSdName.empty()) {
      worldWithSD = G4TransportationManager::GetTransportationManager()
                      ->GetNavigatorForTracking()
                      ->GetWorldVolume();
    }
    else {
      worldWithSD =
        G4TransportationManager::GetTransportationManager()->GetParallelWorld(fWorldWithSdName);
    }
    fpNavigator->SetWorldVolume(worldWithSD);
    // use track global position
    fpNavigator->LocateGlobalPointAndUpdateTouchable(aTrack.GetPrimaryTrack()->GetPosition(),
                                                     fTouchableHandle(), false);
    fNaviSetup = true;
  }
  else {
    // for further deposits use hit (local) position and local->global
    // transformation
    fpNavigator->LocateGlobalPointAndUpdateTouchable(
      aTrack.GetInverseAffineTransformation()->TransformPoint(aHit.GetPosition()),
      fTouchableHandle());
  }
  G4VPhysicalVolume* currentVolume = fTouchableHandle()->GetVolume();
 
  if (currentVolume != nullptr) {
    G4VSensitiveDetector* sensitive = currentVolume->GetLogicalVolume()->GetSensitiveDetector();
    auto fastSimSensitive = dynamic_cast<G4VFastSimSensitiveDetector*>(sensitive);
    if (fastSimSensitive != nullptr) {
      fastSimSensitive->Hit(&aHit, &aTrack, &fTouchableHandle);
    }
    else if ((sensitive != nullptr)
             && (currentVolume->GetLogicalVolume()->GetFastSimulationManager() != nullptr))
    {
      fpSpotS->SetTotalEnergyDeposit(aHit.GetEnergy());
      fpSpotS->SetTrack(const_cast<G4Track*>(aTrack.GetPrimaryTrack()));
      fpSpotP->SetWeight(aTrack.GetPrimaryTrack()->GetWeight());
      fpSpotP->SetPosition(aHit.GetPosition());
      fpSpotP->SetGlobalTime(aTrack.GetPrimaryTrack()->GetGlobalTime());
      fpSpotP->SetLocalTime(aTrack.GetPrimaryTrack()->GetLocalTime());
      fpSpotP->SetProperTime(aTrack.GetPrimaryTrack()->GetProperTime());
      fpSpotP->SetTouchableHandle(fTouchableHandle);
      fpSpotP->SetProcessDefinedStep(fpProcess);
      fpSpotP->SetStepStatus(fUserDefinedLimit);
      sensitive->Hit(fpSpotS);
    }
  }
}

SetNameOfWorldWithSD()

void G4FastSimHitMaker::SetNameOfWorldWithSD ( const G4String & aName )

inline

If sensitive detector class is in the parallel world, it must be specified, otherwise no sensitive detector will be found (mass geometry will be checked).

Parameters

[in]

aName

Name of the parallel world

Definition at line 65 of file G4FastSimHitMaker.hh.

{ fWorldWithSdName = aName; };

SetProcess()

void G4FastSimHitMaker::SetProcess ( G4VProcess * proc )

inline

Definition at line 66 of file G4FastSimHitMaker.hh.

{ fpProcess = proc; }

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The documentation for this class was generated from the following files:

• G4FastSimHitMaker.hh
• G4FastSimHitMaker.cc