MuonDecayTruthTrajectoryBuilder.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// Dear emacs, this is -*-c++-*-
 
#ifndef MUONDECAYTRUTHTRAJECTORYBUILDER_H
#define MUONDECAYTRUTHTRAJECTORYBUILDER_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "AtlasHepMC/GenVertex_fwd.h"
#include "AtlasHepMC/GenParticle_fwd.h"
#include "TrkToolInterfaces/ITruthTrajectoryBuilder.h"
#include <utility> //for std::pair
 
namespace Muon {
 
    class MuonDecayTruthTrajectoryBuilder : virtual public Trk::ITruthTrajectoryBuilder, public AthAlgTool {
    public:
        MuonDecayTruthTrajectoryBuilder(const std::string& type, const std::string& name, const IInterface* parent);
 
       
 
        void buildTruthTrajectory(TruthTrajectory* result, const HepMC::ConstGenParticlePtr& input) const override;

        HepMC::ConstGenParticlePtr getMother(const HepMC::ConstGenParticlePtr& particle) const override;

        HepMC::ConstGenParticlePtr getDaughter(const HepMC::ConstGenParticlePtr&particle) const override;
 
    private:
        typedef std::pair<HepMC::ConstGenParticlePtr, HepMC::ConstGenParticlePtr> MotherDaughter;

        MotherDaughter truthTrajectoryCuts(const HepMC::ConstGenVertexPtr& vtx) const;
 
    };
 
}  // namespace Muon
 
#endif