MCTrueSeedFinder.h

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRKVERTEXSEEDFINDERTOOLS_MCTRUESEEDFINDER_H
#define TRKVERTEXSEEDFINDERTOOLS_MCTRUESEEDFINDER_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "TrkVertexFitterInterfaces/IVertexSeedFinder.h"
#include "xAODEventInfo/EventInfo.h"
#include "GeneratorObjects/McEventCollection.h"
 
 
#include "AtlasHepMC/GenParticle_fwd.h"
#include "AtlasHepMC/GenEvent_fwd.h"
 
namespace Trk
{
  // @author N. Giacinto Piacquadio (Albert-Ludwigs-Universitaet Freiburg - Germany)
  //
  // @ATLAS software
  //
  // This class implements a dummy seed finder
  //
  // -----------------------------------------
  // Changes:
  //
  // David Shope <david.richard.shope@cern.ch> (2016-04-19)
  //
  // EDM Migration to xAOD - from Trk::VxCandidate to xAOD::Vertex, 
  //                         from Trk::RecVertex   to xAOD::Vertex,
  //                         from Trk::Vertex      to Amg::Vector3D
 
  class MCTrueSeedFinder final: public extends<AthAlgTool, IVertexSeedFinder>
  {
  public:
    // Standard Gaudi constructor.
    MCTrueSeedFinder (const std::string& t,
                      const std::string& n,
                      const IInterface*  p);
 
 
    virtual ~MCTrueSeedFinder();
 
 
    virtual StatusCode initialize() override;
 
 
    using IVertexSeedFinder::findSeed;
 

    virtual Amg::Vector3D
    findSeed (const std::vector<const Trk::Track*> & vectorTrk,
              const xAOD::Vertex * constraint=0) const override final;
    

    virtual Amg::Vector3D
    findSeed (const std::vector<const Trk::TrackParameters*> & perigeeList,
              const xAOD::Vertex * constraint=0) const override final;
 

    virtual std::vector<Amg::Vector3D>
    findMultiSeeds(const std::vector<const Trk::Track*>& vectorTrk,
                   const xAOD::Vertex * constraint=0) const override final;
 

    virtual std::vector<Amg::Vector3D>
    findMultiSeeds(const std::vector<const Trk::TrackParameters*>& perigeeList,
                   const xAOD::Vertex * constraint=0) const override final;
 
 
  private:
    SG::ReadHandleKey<McEventCollection> m_mcEventCollectionKey{
      this,
      "McTruthCollection",
      "G4Truth",
      "MC Event Collection Name"
    };
 
    //Implement directly pass methods from GenObjectsFilterTool until better sol'n is found
    bool m_removeInTimePileUp; 
    bool m_removeHardScattering; 

    bool pass( const HepMC::GenEvent* evt,
           const McEventCollection* coll = 0 ) const;
    bool pass( const HepMC::ConstGenParticlePtr& part,
           const McEventCollection* coll = 0 ) const;
 
    StatusCode retrieveInteractionsInfo (std::vector<Amg::Vector3D>& interactions) const;
  };
}
#endif