Geant4 Cross Reference

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Geant4/examples/advanced/ICRP145_HumanPhantoms/src/TETSteppingAction.cc

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 25 //
 26 // TETSteppingAction.cc
 27 //
 28 // Author: Haegin Han
 29 // Reference: ICRP Publication 145. Ann. ICRP 49(3), 2020.
 30 // Geant4 Contributors: J. Allison and S. Guatelli
 31 //
 32 
 33 #include "TETSteppingAction.hh"
 34 
 35 TETSteppingAction::TETSteppingAction()
 36 : G4UserSteppingAction(), fKCarTolerance(1.0000000000000002e-07), fStepCounter(0),
 37   fCheckFlag(0)
 38 {}
 39 
 40 void TETSteppingAction::UserSteppingAction(const G4Step* step)
 41 {
 42  // Slightly move the particle when the step length of five continuous steps is
 43  // shorter than the tolerance (0.1 nm)
 44  //
 45  G4Track* theTrack = step->GetTrack();
 46  G4bool CheckingLength = (step->GetStepLength() < fKCarTolerance);
 47  if(CheckingLength)
 48  {
 49   ++fStepCounter;
 50   if( fCheckFlag && fStepCounter>=5 )
 51   {
 52    // kill the track if the particle is stuck even after the slight move
 53    // (this hardly occurs)
 54    theTrack->SetTrackStatus(fStopAndKill);
 55    fStepCounter=0;
 56    fCheckFlag=0;
 57 }
 58  else if(fStepCounter>=5 )
 59   {
 60    // if a particle is at the same position (step length < 0.1 nm) for five consecutive steps,
 61    // slightly move (0.1 nm) the stuck particle in the direction of momentum
 62    theTrack->SetPosition(theTrack->GetPosition() + theTrack->GetMomentumDirection()*fKCarTolerance);
 63    fCheckFlag=1;
 64   }
 65  }
 66 else fStepCounter=0;
 67 }
 68