MeasurementExtractor Class Reference

#include <MeasurementExtractor.h>

Public Member Functions
AlgebraicSymMatrix	measuredError (const TrackingRecHit &)
template<unsigned int D>
AlgebraicROOTObject< D >::SymMatrix	measuredError (const TrackingRecHit &hit)
AlgebraicVector	measuredParameters (const TrackingRecHit &)
template<unsigned int D>
AlgebraicROOTObject< D >::Vector	measuredParameters (const TrackingRecHit &hit)
	MeasurementExtractor (const TrajectoryStateOnSurface &aTSoS)

Private Attributes
const TrajectoryStateOnSurface &	theTSoS

Detailed Description

Extracts the subset of TrajectoryState parameters and errors that correspond to the parameters measured by a RecHit.

Definition at line 11 of file MeasurementExtractor.h.

Constructor & Destructor Documentation

MeasurementExtractor()

MeasurementExtractor::MeasurementExtractor ( const TrajectoryStateOnSurface &  aTSoS )

inline

Definition at line 14 of file MeasurementExtractor.h.

: theTSoS(aTSoS) {}

Member Function Documentation

measuredError() [1/2]

AlgebraicSymMatrix MeasurementExtractor::measuredError

(

const TrackingRecHit &

hit

)

Definition at line 9 of file MeasurementExtractor.cc.

                                                                                {
  AlgebraicSymMatrix err5(asHepMatrix(theTSoS.localError().matrix()));
  AlgebraicMatrix H(hit.projectionMatrix());
  //  return AlgebraicSymMatrix( H * err5 * H.T());
  return err5.similarity(H);
}

References asHepMatrix(), class-composition::H, TrajectoryStateOnSurface::localError(), LocalTrajectoryError::matrix(), and theTSoS.

measuredError() [2/2]

template<unsigned int D>

AlgebraicROOTObject<D>::SymMatrix MeasurementExtractor::measuredError ( const TrackingRecHit &  hit )

inline

Definition at line 33 of file MeasurementExtractor.h.

                                                                                    {
    typedef typename AlgebraicROOTObject<D, 5>::Matrix Mat;
    const AlgebraicSymMatrix55 &err5 = theTSoS.localError().matrix();
    Mat H = asSMatrix<D, 5>(hit.projectionMatrix());
    return ROOT::Math::Similarity(H, err5);
  }

References class-composition::H, TrajectoryStateOnSurface::localError(), LocalTrajectoryError::matrix(), and theTSoS.

measuredParameters() [1/2]

AlgebraicVector MeasurementExtractor::measuredParameters

(

const TrackingRecHit &

hit

)

Definition at line 3 of file MeasurementExtractor.cc.

                                                                                  {
  AlgebraicVector par5(asHepVector(theTSoS.localParameters().vector()));
  AlgebraicMatrix H(hit.projectionMatrix());
  return H * par5;
}

References asHepVector(), class-composition::H, TrajectoryStateOnSurface::localParameters(), theTSoS, and LocalTrajectoryParameters::vector().

measuredParameters() [2/2]

template<unsigned int D>

AlgebraicROOTObject<D>::Vector MeasurementExtractor::measuredParameters ( const TrackingRecHit &  hit )

inline

Definition at line 25 of file MeasurementExtractor.h.

                                                                                      {
    typedef typename AlgebraicROOTObject<D, 5>::Matrix Mat;
    AlgebraicVector5 par5(theTSoS.localParameters().vector());
    Mat H = asSMatrix<D, 5>(hit.projectionMatrix());
    return H * par5;
  }

References class-composition::H, TrajectoryStateOnSurface::localParameters(), theTSoS, and LocalTrajectoryParameters::vector().

Member Data Documentation

theTSoS

const TrajectoryStateOnSurface& MeasurementExtractor::theTSoS

private

Definition at line 41 of file MeasurementExtractor.h.

Referenced by measuredError(), and measuredParameters().