VKalExtPropagator.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
// VKalVrtAtlas.h
//
#ifndef TRKVKALVRTFITTER_VKALEXTPROPAGATOR_H
#define TRKVKALVRTFITTER_VKALEXTPROPAGATOR_H
 
// External propagator
#include "TrkExInterfaces/IExtrapolator.h"
#include "TrkVKalVrtCore/Propagator.h"
 
namespace Trk {
 
class TrkVKalVrtFitter;
class StraightLineSurface;
 
//  External propagator access for TrkVKalVrtCore
//-----------------------------------------------------
class VKalExtPropagator : public Trk::basePropagator {
 public:
  VKalExtPropagator(TrkVKalVrtFitter *);
  virtual ~VKalExtPropagator();
 
  //
  // Propagator from RefStart point  to RefEnd point in local coordinate
  //   system. Global coordinates are encapsulated inside function
  //
  virtual void Propagate(long int trkID, long int Charge, double *ParOld,
                         double *CovOld, double *RefStart, double *RefEnd,
                         double *ParNew, double *CovNew,
                         IVKalState &istate) const override;
  virtual bool checkTarget(double *, const IVKalState &istate) const override;
 
  void setPropagator(const IExtrapolator *);
 
  const TrackParameters *myExtrapWithMatUpdate(long int TrkID,
                                               const TrackParameters *inpPer,
                                               Amg::Vector3D *endPoint,
                                               const IVKalState &istate) const;
  const TrackParameters *myExtrapToLine(long int TrkID,
                                        const TrackParameters *inpPer,
                                        Amg::Vector3D *endPoint,
                                        StraightLineSurface &lineTarget,
                                        const IVKalState &istate) const;
  const NeutralParameters *myExtrapNeutral(const NeutralParameters *inpPer,
                                           Amg::Vector3D *endPoint) const;
 
  const Perigee *myxAODFstPntOnTrk(const xAOD::TrackParticle *xprt) const;
 
 private:
  const IExtrapolator *m_extrapolator;  
  TrkVKalVrtFitter *m_vkalFitSvc;       
 
  double Protection(const double *, const IVKalState &istate) const;
};
 
}  // namespace Trk
 
#endif