IGeantFollowerHelper.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/

// IGeantFollowerHelperFollowerHelper.h, (c) ATLAS Detector software
 
#ifndef IGeantFollowerHelper_H
#define IGeantFollowerHelper_H
 
// Gaudi
#include "GaudiKernel/IAlgTool.h"
 
#include "G4ThreeVector.hh"
 
namespace Trk {

  static const InterfaceID IID_IGeantFollowerHelper("IGeantFollowerHelper", 1, 0);

  class IGeantFollowerHelper : virtual public IAlgTool {
    public:

      virtual ~IGeantFollowerHelper(){}

      static const InterfaceID& interfaceID() { return IID_IGeantFollowerHelper; }
 
      // Follower interface
      // a) begin event - initialize follower process
      virtual void beginEvent() = 0;
      // b) track the particle
      virtual void trackParticle(const G4ThreeVector& pos, const G4ThreeVector& mom, int pdg, double charge, float t, float X0) = 0;
      // c) end event - ntuple writing
      virtual void endEvent() = 0;
 
  };
 
 
} // end of namespace
 
#endif // IGeantFollowerHelper_H