G4VFastSimSensitiveDetector.hh

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#ifndef G4VFASTSIMSENSITIVEDETECTOR_HH
#define G4VFASTSIMSENSITIVEDETECTOR_HH
 
#include "G4VReadOutGeometry.hh"
#include "G4TouchableHistory.hh"
#include "G4VSensitiveDetector.hh"
#include "G4FastHit.hh"
#include "G4FastTrack.hh"
 
class G4VFastSimSensitiveDetector
{
 public:
  inline G4bool Hit(const G4FastHit* aHit, const G4FastTrack* aTrack,
                    G4TouchableHandle* aTouchable)
  {
    G4bool result                 = true;
    G4VSensitiveDetector* sensDet = dynamic_cast<G4VSensitiveDetector*>(this);
    if(sensDet == nullptr)
    {
      G4Exception("G4VFastSimSensitiveDetector::Hit()", "InvalidSetup",
                  FatalException,
                  "Sensitive detector needs also to inherit also from "
                  "G4VSensitiveDetector if full "
                  "simulation is used instead!");
    }
    if(sensDet->isActive())
    {
      G4VReadOutGeometry* ROgeometry = sensDet->GetROgeometry();
      G4TouchableHistory* ROhistory  = 0;
 
      if(ROgeometry)
      {
        // create fake pre-step point updating the touchable from read-out
        // geometry.
        G4Step fakeStep;
        const G4Track* currentTrack = aTrack->GetPrimaryTrack();
        G4StepPoint* tmpPoint       = fakeStep.GetPreStepPoint();
        tmpPoint->SetTouchableHandle(*aTouchable);
        tmpPoint->SetPosition(aHit->GetPosition());
        tmpPoint->SetMomentumDirection(currentTrack->GetMomentumDirection());
        result = ROgeometry->CheckROVolume(&fakeStep, ROhistory);
      } else {
        ROhistory = static_cast<G4TouchableHistory*>((*aTouchable)());
      }
      if(result)
        result = ProcessHits(aHit, aTrack, ROhistory);
    }
    else
    {
      result = false;
    }
    return result;
  }
 
 private:
  virtual G4bool ProcessHits(const G4FastHit* aHit, const G4FastTrack* aTrack,
                             G4TouchableHistory* aROHistory) = 0;
};
#endif /* G4VFASTSIMSENSITIVEDETECTOR_HH */