SteppingAction.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
//-----------------------------------------------------------------------------
// Description : A class to control a track in G4
//-----------------------------------------------------------------------------
 
#include "G4Step.hh"
#include "trg/cdc/SteppingAction.h"
 
using namespace std;
 
namespace Belle2 {
  TRGCDCSteppingAction::TRGCDCSteppingAction()
  {
  }
 
  TRGCDCSteppingAction::~TRGCDCSteppingAction()
  {
  }
 
  void
  TRGCDCSteppingAction::UserSteppingAction(const G4Step* aStep)
  {
    const G4StepPoint& in = * aStep->GetPreStepPoint();
    const G4StepPoint& out = * aStep->GetPostStepPoint();
    const double rIn = in.GetPosition().r();
    const double rOut = out.GetPosition().r();
    const bool curlBack = rIn > rOut;
    if (curlBack)
      aStep->GetTrack()->SetTrackStatus(fKillTrackAndSecondaries);
  };
 
} // namespace Belle2