SAXSSensitiveDetector.cc

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/// \file SAXSSensitiveDetector.cc
/// \brief Implementation of the SAXSSensitiveDetector class
//
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#include "SAXSSensitiveDetector.hh"
#include "SAXSSensitiveDetectorHit.hh"
 
#include "G4HCofThisEvent.hh"
#include "G4TouchableHistory.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4SDManager.hh"
#include "G4Navigator.hh"
#include "G4ios.hh"
 
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SAXSSensitiveDetector::SAXSSensitiveDetector(G4String name):
  G4VSensitiveDetector(name)
{
  G4String HCname;
  collectionName.insert(HCname="collection");
  fHCID = -1;
  
  fVarStopAndKill = true;
  
  fSDMessenger = new SAXSSensitiveDetectorMessenger(this);
}
 
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SAXSSensitiveDetector::~SAXSSensitiveDetector() {}
 
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void SAXSSensitiveDetector::Initialize(G4HCofThisEvent* HCE)
{
  fHitsCollection = 
          new SensitiveDetectorHitsCollection(SensitiveDetectorName,collectionName[0]);
  if(fHCID<0) 
    fHCID = G4SDManager::GetSDMpointer()->GetCollectionID(fHitsCollection);  
  HCE->AddHitsCollection(fHCID,fHitsCollection);    
}
 
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bool SAXSSensitiveDetector::ProcessHits(G4Step* aStep,G4TouchableHistory*)
{   
  G4Track* vTrack = aStep->GetTrack();
  
  G4StepPoint* preStepPoint = aStep->GetPreStepPoint();
  
  G4ThreeVector worldPosition = preStepPoint->GetPosition();        
  G4ThreeVector localPosition = preStepPoint->GetTouchableHandle()->
                GetHistory()->GetTopTransform().TransformPoint(worldPosition);
  
  G4ThreeVector mom = preStepPoint->GetMomentumDirection();
  
  //if the partcile is not on the boundary of the sensitive detector, return
  if (!(preStepPoint->GetStepStatus() == fGeomBoundary)) {return false;}        
  
  G4int vType = -1;
  if(preStepPoint->GetMass() == 0 && preStepPoint->GetCharge() == 0) {
    vType = 0;
  }
  else if(preStepPoint->GetMass() != 0 && preStepPoint->GetCharge() == 0) {
    vType = 1;
  }
  else if(preStepPoint->GetMass() != 0 && preStepPoint->GetCharge() > 0) {
    vType = 2;
  }
  else if(preStepPoint->GetMass() != 0 && preStepPoint->GetCharge() < 0) {
    vType = 3;
  }
 
  //insert a hit        
  SAXSSensitiveDetectorHit* aHit = new SAXSSensitiveDetectorHit();
  aHit->SetPos(localPosition);
  aHit->SetMom(mom);
  aHit->SetType(vType);        
  aHit->SetEnergy(preStepPoint->GetKineticEnergy()); 
  aHit->SetTime(preStepPoint->GetGlobalTime());
  aHit->SetTrackID(vTrack->GetTrackID());
  aHit->SetWeight(vTrack->GetWeight());
  fHitsCollection->insert(aHit);
  
  if (fVarStopAndKill) {vTrack->SetTrackStatus(fStopAndKill);}
  
  return true;
}
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void SAXSSensitiveDetector::EndOfEvent(G4HCofThisEvent*) {}
 
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