/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/Alignment/CommonAlignmentParametrization/interface/BeamSpotAlignmentParameters.h

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#ifndef Alignment_CommonAlignment_BeamSpotAlignmentParameters_h
#define Alignment_CommonAlignment_BeamSpotAlignmentParameters_h

#include "Alignment/CommonAlignment/interface/AlignmentParameters.h"
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"


class Alignable;
class AlignableDetOrUnitPtr;
class TrajectoryStateOnSurface;

class BeamSpotAlignmentParameters : public AlignmentParameters 
{

public:

  enum AlignmentParameterName 
        {
          dx = 0, dy,
          dxslope, dyslope,
          N_PARAM
        };
  
  BeamSpotAlignmentParameters( Alignable* alignable, bool calcMis );

  BeamSpotAlignmentParameters( Alignable* alignable, 
                               const AlgebraicVector& parameters, 
                               const AlgebraicSymMatrix& covMatrix );

  BeamSpotAlignmentParameters( Alignable* alignable, const AlgebraicVector& parameters, 
                               const AlgebraicSymMatrix& covMatrix, 
                               const std::vector<bool>& selection );

  virtual ~BeamSpotAlignmentParameters();
  virtual void apply();
  virtual int type() const;

  virtual BeamSpotAlignmentParameters* clone( const AlgebraicVector& parameters, 
                                              const AlgebraicSymMatrix& covMatrix ) const;
 
  virtual BeamSpotAlignmentParameters*
    cloneFromSelected(const AlgebraicVector& parameters, const AlgebraicSymMatrix& covMatrix) const;
  
  virtual AlgebraicMatrix derivatives( const TrajectoryStateOnSurface& tsos,
                                       const AlignableDetOrUnitPtr & ) const;

  virtual AlgebraicMatrix selectedDerivatives( const TrajectoryStateOnSurface& tsos, 
                                               const AlignableDetOrUnitPtr & ) const;

  AlgebraicVector translation(void) const;

  AlgebraicVector rotation(void) const;

  AlgebraicVector globalParameters(void) const;

  void print(void) const;

  static AlgebraicVector displacementFromAlignable(const Alignable* ali);
};

#endif