IVertexTrackDensityEstimator.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/

// IVertexTrackDensityEstimator.h, (c) ATLAS Detector software 2018
 
#ifndef TRKVERTEXFITTERINTERFACE_IVERTEXTRACKDENSITYESTIMATOR_H
#define TRKVERTEXFITTERINTERFACE_IVERTEXTRACKDENSITYESTIMATOR_H
 
#include "GaudiKernel/IAlgTool.h"
#include "TrkParameters/TrackParameters.h"

 
namespace Trk
{
  class Track;
 
  class IVertexTrackDensityEstimator : virtual public IAlgTool
  {
  public:
    DeclareInterfaceID (IVertexTrackDensityEstimator, 1, 0);
 

    class ITrackDensity
    {
    public:
      virtual ~ITrackDensity() = default;
 

      virtual double trackDensity (double z) const = 0;
 

      virtual void trackDensity (double z,
                                 double& density,
                                 double& firstDerivative,
                                 double& secondDerivative) const = 0;
    };
 

    virtual ~IVertexTrackDensityEstimator() = default;
 

    virtual double
    globalMaximum (const std::vector<const Track*>& vectorTrk) const = 0;
 

    virtual double
    globalMaximum (const std::vector<const Track*>& vectorTrk,
                   std::unique_ptr<ITrackDensity>& density) const = 0;
 

    virtual double
    globalMaximum (const std::vector<const TrackParameters*>& perigeeList) const = 0;
 
    virtual std::pair<double,double>
    globalMaximumWithWidth (const std::vector<const TrackParameters*>& perigeeList) const = 0;

    virtual double
    globalMaximum (const std::vector<const TrackParameters*>& perigeeList,
                   std::unique_ptr<ITrackDensity>& density) const = 0;
  };
 
 
 
 
} // namespace Trk
 
 
#endif