DecayInFlyTruthTrajectoryBuilder.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
// Dear emacs, this is -*-c++-*-
 
#ifndef DECAYINFLYTRUTHTRAJECTORYBUILDER_H
#define DECAYINFLYTRUTHTRAJECTORYBUILDER_H
 
#include "TrkToolInterfaces/ITruthTrajectoryBuilder.h"
#include "AthenaBaseComps/AthAlgTool.h"
 
#include "AtlasHepMC/GenVertex_fwd.h"
 
namespace Trk {
  
  class DecayInFlyTruthTrajectoryBuilder final: virtual public ITruthTrajectoryBuilder,
                       public AthAlgTool 
  {
  public:
    DecayInFlyTruthTrajectoryBuilder(const std::string& type, const std::string& name, const IInterface* parent);
 
    virtual StatusCode initialize();
    
    void buildTruthTrajectory(TruthTrajectory *result, const HepMC::ConstGenParticlePtr& input) const ;
    
    HepMC::ConstGenParticlePtr getMother(const HepMC::ConstGenParticlePtr& particle) const;

    HepMC::ConstGenParticlePtr getDaughter(const HepMC::ConstGenParticlePtr& particle) const;

    typedef std::pair<HepMC::ConstGenParticlePtr,HepMC::ConstGenParticlePtr> MotherDaughter;

    static MotherDaughter truthTrajectoryCuts(const HepMC::ConstGenVertexPtr& vtx) ;
  };
  
} // end namespace Trk
 
#endif/*DECAYINFLYTRUTHTRAJECTORYBUILDER_H*/