Reconstruction/MdcPatRec/TrkFitter/include/TrkFitter/TrkBmSpotOnTrk.h

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//--------------------------------------------------------------------------
// File and Version Information:
//      $Id: TrkBmSpotOnTrk.h,v 1.1.1.1 2005/04/21 06:26:56 maqm Exp $
//
// Description:
//   Defines interface between Svt hit and track, and stores information
//       about fit.  Used by fitters
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Authors: Steve Schaffner
//
//      Copyright (C) 1996      Stanford Linear Accelerator Center
//------------------------------------------------------------------------
 
#ifndef TRKBMSPOTONTRK_H
#define TRKBMSPOTONTRK_H
 
#include "TrkBase/TrkEnums.h"
#include "TrkBase/TrkHitOnTrk.h"
#include "TrkBase/TrkLineTraj.h"
 
#include "CLHEP/Geometry/Point3D.h"
#include "CLHEP/Matrix/SymMatrix.h"
 
// Class interface //
class TrkBmSpotOnTrk : public TrkHitOnTrk {
public:
  TrkBmSpotOnTrk( const HepPoint3D& ip, const HepSymMatrix& size );
  ~TrkBmSpotOnTrk();
 
  TrkBmSpotOnTrk*               clone( TrkRep*, const TrkDifTraj* t = 0 ) const;
  virtual TrkEnums::TrkViewInfo whatView() const;
  virtual unsigned              layerNumber() const { return 0; }
 
  const Trajectory* hitTraj() const;
  const HepPoint3D& ip() const;
 
  // this hot has no timing information
  virtual bool timeResid( double& t, double& tErr ) const { return false; }
  virtual bool timeAbsolute( double& t, double& tErr ) const { return false; }
 
protected:
  TrkBmSpotOnTrk( const TrkBmSpotOnTrk& hitToBeCopied, TrkRep* newRep,
                  const TrkDifTraj* trkTraj = 0 );
  virtual TrkErrCode updateMeasurement( const TrkDifTraj* traj, bool maintainAmbiguity );
 
  static const TrkLineTraj FindBeamTrajectory( const HepPoint3D&   point,
                                               const HepSymMatrix& error );
  double                   GetRms();
 
private:
  // Make sure these aren't used by mistake:
  TrkBmSpotOnTrk& operator=( const TrkBmSpotOnTrk& );
  TrkBmSpotOnTrk( const TrkBmSpotOnTrk& );
 
  const TrkLineTraj  _beamTraj;
  const HepPoint3D   _ip;
  const HepSymMatrix _size;
};
 
#endif