Reconstruction/MdcPatRec/TrkBase/include/TrkBase/TrkExchangePar.h

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//--------------------------------------------------------------------------
// File and Version Information:
//      $Id: TrkExchangePar.h,v 1.3 2010/03/25 09:56:26 zhangy Exp $
//
// Description: Class to pass around a minimal set of track parameters from
//   one class to another.  It has no functionality.
//
//
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Authors: Steve Schaffner
//
// Revision History:
//  20020417  M. Kelsey -- Add print(), printAll(), and operator<<
//------------------------------------------------------------------------
#ifndef TRKEXCHANGEPAR_H
#define TRKEXCHANGEPAR_H
#include "CLHEP/Matrix/Matrix.h"
#include "CLHEP/Matrix/SymMatrix.h"
#include "CLHEP/Matrix/Vector.h"
 
#include <iosfwd>
 
using CLHEP::Hep3Vector;
using CLHEP::HepMatrix;
using CLHEP::HepSymMatrix;
using CLHEP::HepVector;
// Class interface //
class TrkExchangePar {
public:
  enum { nParam = 5 };
  enum { ex_d0, ex_phi0, ex_omega, ex_z0, ex_tanDip };
 
  TrkExchangePar( const HepVector&, const HepMatrix& );
  TrkExchangePar( const HepVector&, const HepSymMatrix& );
  TrkExchangePar( const HepVector& );
  TrkExchangePar( double d0In, double phi0In, double omegaIn, double z0In, double tanDipIn );
  ~TrkExchangePar();
 
  double d0() const { return paramVec[ex_d0]; }
  double phi0() const { return paramVec[ex_phi0]; }
  double omega() const { return paramVec[ex_omega]; }
  double z0() const { return paramVec[ex_z0]; }
  double tanDip() const { return paramVec[ex_tanDip]; }
 
  const HepVector&    params() const { return paramVec; }
  HepVector&          params() { return paramVec; }
  const HepSymMatrix& covariance() const { return paramErr; }
  HepSymMatrix&       covariance() { return paramErr; }
 
  void setD0( double in ) { paramVec[ex_d0] = in; }
  void setPhi0( double in ) { paramVec[ex_phi0] = in; }
  void setOmega( double in ) { paramVec[ex_omega] = in; }
  void setZ0( double in ) { paramVec[ex_z0] = in; }
  void setTanDip( double in ) { paramVec[ex_tanDip] = in; }
  void setError( const HepSymMatrix& in ) { paramErr = in; }
 
  void print( std::ostream& o ) const;    // Print parameters on one line
  void printAll( std::ostream& o ) const; // Print parameters and error matrix
 
private:
  HepVector    paramVec;
  HepSymMatrix paramErr;
};
 
// Output operator, useful for debugging
std::ostream& operator<<( std::ostream& o, const TrkExchangePar& helix );
 
#endif