Geant4TrackingPreAction.cpp

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//==========================================================================
//  AIDA Detector description implementation 
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
// Author     : M.Frank
//
//==========================================================================
 
// Framework include files
#include <DD4hep/InstanceCount.h>
#include <DDG4/Geant4TrackingPreAction.h>
 
// Geant4 include files
#include <G4TrackingManager.hh>
 
using namespace dd4hep::sim;
 
Geant4TrackingPreAction::Geant4TrackingPreAction(Geant4Context* ctxt, const std::string& nam)
  : Geant4TrackingAction(ctxt, nam) {
  InstanceCount::increment(this);
}
 
Geant4TrackingPreAction::~Geant4TrackingPreAction() {
  InstanceCount::decrement(this);
}
 
void Geant4TrackingPreAction::begin(const G4Track* track) {
  // Is the track valid? Is tracking manager valid?
  // Does trajectory already exist?
  if (0 == track || 0 == trackMgr() || 0 != trackMgr()->GimmeTrajectory())
    return;
  trackMgr()->SetStoreTrajectory(true);
  // create GaussTrajectory and inform Tracking Manager
  G4VTrajectory* tr = context()->createTrajectory(track);
  trackMgr()->SetTrajectory(tr);
}
 
void Geant4TrackingPreAction::end(const G4Track* /* track */) {
}