Trk2dDistanceSeeder.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRKVERTEXSEEDFINDERUTILS_TRK2DDISTANCESEEDER_H
#define TRKVERTEXSEEDFINDERUTILS_TRK2DDISTANCESEEDER_H
 
#include "GaudiKernel/ToolHandle.h"
#include <vector>
#include "TrkVertexSeedFinderUtils/SeedFinderParamDefs.h"
#include "GeoPrimitives/GeoPrimitives.h"
#include "AthenaBaseComps/AthAlgTool.h"
#include "MagFieldConditions/AtlasFieldCacheCondObj.h"
 
namespace Trk
{
 
  static const InterfaceID IID_Trk2dDistanceSeeder("Trk2dDistanceSeeder", 1, 1);
  
  class Trk2dDistanceSeeder final: public AthAlgTool
  {
  public:
 
    static const InterfaceID& interfaceID()
    {
        return IID_Trk2dDistanceSeeder;
    };
 
 
    //default constructor due to Athena interface
    Trk2dDistanceSeeder(const std::string& t, const std::string& n, const IInterface*  p);
    
    //
    //destructor
    virtual ~Trk2dDistanceSeeder();
 
    virtual StatusCode initialize() override;
    virtual StatusCode finalize() override;
    
    TwoPointOnTrack GetSeed (const TwoTracks& mytracks,
                                   TwoPoints* twopoints = nullptr) const;
 
 
  private:
    double getBField (const Perigee& p, MagField::AtlasFieldCache& cache) const;
    
    //option
    bool m_solveAmbiguityUsingZ;
 
    SG::ReadCondHandleKey<AtlasFieldCacheCondObj> m_fieldCacheCondObjInputKey 
          {this, "AtlasFieldCacheCondObj", "fieldCondObj", "Name of the Magnetic Field conditions object key"};
  };
}
#endif