factory/shared/src/ScreenSD.cc

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// $Id$
//
//

#include "ScreenSD.hh"
#include "Analysis.hh"

#include "G4VTouchable.hh"
#include "G4Step.hh"
#include "G4ios.hh"
#include "G4SystemOfUnits.hh"

#include "G4VProcess.hh"

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ScreenSD::ScreenSD(const G4String& name)
 : G4VSensitiveDetector(name)
{}

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ScreenSD::~ScreenSD()
{}

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void ScreenSD::Initialize(G4HCofThisEvent* /*hce*/)
{}

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G4bool ScreenSD::ProcessHits(G4Step* step, G4TouchableHistory* /*history*/)
{
  // Current track:
  const G4Track* track = step->GetTrack();

  // Track ID:
  G4int ID = track->GetTrackID();

  // code PDG:
  G4int pdgCode = track->GetDefinition()->GetPDGEncoding();

  // Remember preStepPoint:
  G4StepPoint* preStepPoint = step->GetPreStepPoint();

  // Ekin:
  G4double Ekin =  preStepPoint->GetKineticEnergy();

  // Obtain local coordinates:
  const G4VTouchable* touchable = preStepPoint->GetTouchable();
  G4ThreeVector globalPosition = preStepPoint->GetPosition();
  G4ThreeVector localPosition 
    = touchable->GetHistory()->GetTopTransform().TransformPoint(globalPosition);
  // // Example for obtaining the local direction:
  // G4ThreeVector globalDirection = preStepPoint->GetMomentumDirection();
  // G4ThreeVector localDirection 
  //   = touchable->GetHistory()->GetTopTransform().TransformAxis(localDirection);

  // Time
  G4double time = preStepPoint->GetGlobalTime();
  
  // Store hit in the ntuple
  G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
  analysisManager->FillNtupleIColumn(0, ID);
  analysisManager->FillNtupleIColumn(1, pdgCode);
  analysisManager->FillNtupleDColumn(2, Ekin/MeV);
  analysisManager->FillNtupleDColumn(3, localPosition.x()/cm);
  analysisManager->FillNtupleDColumn(4, localPosition.y()/cm);
  analysisManager->FillNtupleDColumn(5, time/ns);
  analysisManager->AddNtupleRow();  

  return true;
}

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void ScreenSD::EndOfEvent(G4HCofThisEvent* /*hce*/)
{}

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