ITrkVKalVrtFitter.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// ITrkVKalVrtFitter.h  - old VKalVrtInterface
//
//  Old interface of VKalVrt.
//  Fully implemented also in Reconstruction/VKalVrt/VKalVrtFitSvc
//
//---------------------------------------------------------------
#ifndef TRKVKALVRTFITTER_ITRKVKALVRTFITTER_H
#define TRKVKALVRTFITTER_ITRKVKALVRTFITTER_H
//Pphysical vectors
#include "GeoPrimitives/GeoPrimitives.h"
#include "EventPrimitives/EventPrimitives.h"
// Gaudi includes
#include "AthenaBaseComps/AthAlgTool.h"
//
#include  "xAODTracking/TrackParticleFwd.h"
#include  "xAODTracking/NeutralParticleFwd.h"
#include  "TrkVKalVrtFitter/IVKalState.h"
 
#include <vector>
#include <memory>
#include <span>
 
class EventContext;
 
namespace Trk{
 
class IExtrapolator;
class IVKalState;
class Track;
 
//------------------------------------------------------------------------
  static const InterfaceID IID_ITrkVKalVrtFitter("ITrkVKalVrtFitter", 1, 0);
 
  class ITrkVKalVrtFitter : virtual public IAlgTool {
    public:
      static const InterfaceID& interfaceID() { return IID_ITrkVKalVrtFitter;}
//---------------------------------------------------------------------------
//Interface itself
 
     /*
      * Context aware method
      */
      virtual std::unique_ptr<IVKalState> makeState(const EventContext& ctx) const = 0;
 
     /*
      * For non-migrated clients which should always use the context aware method
      */
      virtual std::unique_ptr<IVKalState> makeState() const
      {
        return makeState(Gaudi::Hive::currentContext());
      }
 
      virtual StatusCode VKalVrtFit(
        const std::vector<const xAOD::TrackParticle*>& listC,
        const std::vector<const xAOD::NeutralParticle*>& listN,
        Amg::Vector3D& Vertex,
        TLorentzVector& Momentum,
        long int& Charge,
        std::vector<double>& ErrorMatrix,
        std::vector<double>& Chi2PerTrk,
        std::vector<std::vector<double>>& TrkAtVrt,
        double& Chi2,
        IVKalState& istate,
        bool ifCovV0 = false) const = 0;
 
      virtual StatusCode VKalVrtFit(const std::vector<const Perigee*>& list,
                                    Amg::Vector3D& Vertex,
                                    TLorentzVector& Momentum,
                                    long int& Charge,
                                    std::vector<double>& ErrorMatrix,
                                    std::vector<double>& Chi2PerTrk,
                                    std::vector<std::vector<double>>& TrkAtVrt,
                                    double& Chi2,
                                    IVKalState& istate,
                                    bool ifCovV0 = false) const = 0;
 
      virtual StatusCode VKalVrtFit(
        const std::vector<const TrackParameters*>& listC,
        const std::vector<const NeutralParameters*>& listN,
        Amg::Vector3D& Vertex,
        TLorentzVector& Momentum,
        long int& Charge,
        std::vector<double>& ErrorMatrix,
        std::vector<double>& Chi2PerTrk,
        std::vector<std::vector<double>>& TrkAtVrt,
        double& Chi2,
        IVKalState& istate,
        bool ifCovV0 = false) const = 0;
 
      //------
      virtual StatusCode VKalVrtCvtTool(const Amg::Vector3D& Vertex,
                                        const TLorentzVector& Momentum,
                                        const std::vector<double>& CovVrtMom,
                                        const long int& Charge,
                                        std::vector<double>& Perigee,
                                        std::vector<double>& CovPerigee,
                                        IVKalState& istate) const = 0;
      //.........................................................................................
 
      virtual StatusCode VKalVrtFitFast(
        std::span<const xAOD::TrackParticle* const> list,
        Amg::Vector3D& Vertex,
        IVKalState& istate) const = 0;
 
      virtual StatusCode VKalVrtFitFast(
        const std::vector<const TrackParameters*>& list,
        Amg::Vector3D& Vertex,
        IVKalState& istate) const = 0;
      //.........................................................................................
 
      virtual std::unique_ptr<Perigee>
    CreatePerigee(const std::vector<double>& VKPerigee,
              const std::vector<double>& VKCov,
              IVKalState& istate) const = 0;
 
      virtual StatusCode VKalGetTrkWeights(std::vector<double>& Weights,
                                           const IVKalState& istate) const = 0;
 
      virtual StatusCode VKalGetFullCov(long int, std::vector<double>& CovMtx,
                                        IVKalState& istate, bool = false) const =0;
 
      virtual StatusCode VKalGetMassError(double& Mass, double& MassError,
                                          const IVKalState& istate) const =0;
 
      virtual void setApproximateVertex(double,double,double,
                                        IVKalState& istate) const =0;
      virtual void setMassForConstraint(double,
                                        IVKalState& istate) const =0;
 
      virtual void setMassForConstraint(double, std::span<const int>,
                                        IVKalState& istate) const =0;
 
      virtual void setRobustness(int, IVKalState& istate) const =0;
 
      virtual void setRobustScale(double, IVKalState& istate) const =0;
 
      virtual void setCnstType(int, IVKalState& istate) const =0;
 
      virtual void setVertexForConstraint(const xAOD::Vertex &,
                                          IVKalState& istate) const=0;
 
      virtual void setVertexForConstraint(double,double,double,
                                          IVKalState& istate) const =0;
 
      virtual void setCovVrtForConstraint(double,double,double,
                                          double,double,double,
                                          IVKalState& istate) const=0;
 
      virtual void setMassInputParticles( const std::vector<double>&,
                                          IVKalState& istate) const=0;
//----------------------------------------------------------------------------------------------------
 
      virtual double VKalGetImpact(const xAOD::TrackParticle*,
                                   const Amg::Vector3D& Vertex,
                                   const long int Charge,
                                   std::vector<double>& Impact,
                                   std::vector<double>& ImpactError,
                                   IVKalState& istate) const = 0;
 
      virtual double VKalGetImpact(const Perigee*,
                                   const Amg::Vector3D& Vertex,
                                   const long int Charge,
                                   std::vector<double>& Impact,
                                   std::vector<double>& ImpactError,
                                   IVKalState& istate) const = 0;
 
      virtual double VKalGetImpact(const xAOD::TrackParticle*,
                                   const Amg::Vector3D& Vertex,
                                   const long int Charge,
                                   std::vector<double>& Impact,
                                   std::vector<double>& ImpactError) const = 0;
 
      virtual double VKalGetImpact(const Perigee*,
                                   const Amg::Vector3D& Vertex,
                                   const long int Charge,
                                   std::vector<double>& Impact,
                                   std::vector<double>& ImpactError) const = 0;
 
      //----------------------------------------------------------------------------------------------------
   };
 
} //end of namespace
 
#endif