TrackDensitySeedFinder.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRKVERTEXSEEDFINDERTOOLS_TrackDensitySeedFinder_H
#define TRKVERTEXSEEDFINDERTOOLS_TrackDensitySeedFinder_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ToolHandle.h"
#include "TrkVertexFitterInterfaces/IVertexAnalyticSeedFinder.h"
#include "TrkVertexFitterInterfaces/IVertexTrackDensityEstimator.h"
 
namespace Trk
{
 
  class Track;
  class IMode1dFinder;
  class ITrackToVertexIPEstimator;
 
  // @author D. Casper
  //
  // @ATLAS software
  //
  // This class implements a seed finder for the primary vertex finding 
  // which is based on the use of a density function along the beam line 
  // 
  // -------------------------------------------
 
  class TrackDensitySeedFinder final: public extends<AthAlgTool, IVertexAnalyticSeedFinder>
  {
  public:
    // Standard Gaudi constructor.
    TrackDensitySeedFinder (const std::string& t,
                            const std::string& n,
                            const IInterface*  p);
 
 
    virtual ~TrackDensitySeedFinder();
 
 
    virtual StatusCode initialize() override;
    virtual StatusCode finalize() 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::pair<Amg::Vector3D, Amg::MatrixX> findAnalyticSeed(
      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:
    ToolHandle<IVertexTrackDensityEstimator> m_densityEstimator{
      this,
      "DensityEstimator",
      "Trk::GaussianTrackDensity",
      "Track density tool"
    };
  };
}
#endif