// this :
#include <G4Lab/TrackingAction.h>

// Geant4 :
#include <G4TrackingManager.hh>

// G4Lab :
#include <G4Lab/Trajectory.h>

G4Lab::TrackingAction::TrackingAction() {}

G4Lab::TrackingAction::~TrackingAction() {}

void G4Lab::TrackingAction::PreUserTrackingAction(const G4Track* aTrack){
  if(!fpTrackingManager) return;
  //  In order to be able to "collect" trajectories 
  // according energy,...
  fpTrackingManager->SetTrajectory(new G4Lab::Trajectory(aTrack));
}