TrackingRecHitPropagator Class Reference

#include <TrackingRecHitPropagator.h>

Public Member Functions
template<class ResultingHit >
TransientTrackingRecHit::RecHitPointer	project (const TransientTrackingRecHit::ConstRecHitPointer hit, const GeomDet &det, const TrajectoryStateOnSurface ts) const
	TrackingRecHitPropagator (const MagneticField *magf)
	~TrackingRecHitPropagator ()

Private Attributes
const AnalyticalPropagator *	thePropagator

Detailed Description

Definition at line 18 of file TrackingRecHitPropagator.h.

Constructor & Destructor Documentation

TrackingRecHitPropagator::TrackingRecHitPropagator ( const MagneticField *  magf )

inline

Definition at line 20 of file TrackingRecHitPropagator.h.

References AnalyticalPropagator_cfi::AnalyticalPropagator, anyDirection, and thePropagator.

                                                       {
        thePropagator = new AnalyticalPropagator(magf, anyDirection, 1.6);
    };

TrackingRecHitPropagator::~TrackingRecHitPropagator ( )

inline

Definition at line 24 of file TrackingRecHitPropagator.h.

References thePropagator.

{delete thePropagator;}

Member Function Documentation

template<class ResultingHit >

TransientTrackingRecHit::RecHitPointer TrackingRecHitPropagator::project ( const TransientTrackingRecHit::ConstRecHitPointer  hit, const GeomDet &  det, const TrajectoryStateOnSurface  ts  ) const

inline

Definition at line 26 of file TrackingRecHitPropagator.h.

References newFWLiteAna::build, TrajectoryStateOnSurface::charge(), alignCSCRings::e, TrajectoryStateOnSurface::isValid(), TrajectoryStateOnSurface::localMomentum(), TrajectoryStateOnSurface::magneticField(), AlCaHLTBitMon_ParallelJobs::p, AnalyticalPropagator::propagate(), GeomDet::surface(), TrajectoryStateOnSurface::surface(), and thePropagator.

                                                                                                         {
    //1) propagate the best possible track parameters to the surface of the hit you want to "move" using a AnalyticalPropagator ;
    //2) create LocalTrajectoryParameters with the local x,y of the hit and direction + momentum from the propagated track parameters;
    //3) create a LocalTrajectoryError matrix which is 0 except for the local x,y submatrix, which is filled with the hit errors;
    //4) create a TSOS from the result of 2) and 3) and propagate it to the reference surface;
    //5) create a new hit with the local x,y subspace of the result of 4)
      if (!ts.isValid()) return InvalidTransientRecHit::build(hit->det());
      //      LogTrace("SiTrackerMultiRecHitUpdator") << "the tsos is valid";     
        //check if the ts lays or not on the destination surface and in case propagate it
        TrajectoryStateOnSurface propagated =ts;
        if (hit->surface() != &(ts.surface())) propagated = thePropagator->propagate(ts, *(hit->surface()));
        if (!propagated.isValid()) return InvalidTransientRecHit::build(hit->det());    
        //    LogTrace("SiTrackerMultiRecHitUpdator") << "the propagate tsos is valid";   
        //      LogTrace("SiTrackerMultiRecHitUpdator") << "Original: position: "<<hit->parameters()<<" error: "<<hit->parametersError()<<std::endl;
        //clone the original hit with this state
        TransientTrackingRecHit::RecHitPointer updatedOriginal = hit->clone(propagated);
        //      LogTrace("SiTrackerMultiRecHitUpdator") << "New: position: "<<updatedOriginal->parameters()<<" error: "<<updatedOriginal->parametersError()<<std::endl;
        
        //    LogTrace("SiTrackerMultiRecHitUpdator") << "rechit cloned";     
        LocalTrajectoryParameters ltp(updatedOriginal->localPosition(), propagated.localMomentum(), propagated.charge());
        AlgebraicSymMatrix55 ltem;
        ltem(3,3) = (updatedOriginal->parametersError())(1,1);
        ltem(4,4) = (updatedOriginal->parametersError())(2,2);
        ltem(3,4) = (updatedOriginal->parametersError())(1,2);
        //      LogTrace("SiTrackerMultiRecHitUpdator") <<"The cov matrix: "<<ltem<<std::endl;
        LocalTrajectoryError lte(ltem);
        //      LogTrace("SiTrackerMultiRecHitUpdator") <<"Original cov matrix: "<<lte.matrix()<<std::endl;
        TrajectoryStateOnSurface hit_state(ltp, lte, propagated.surface(), propagated.magneticField());
        TrajectoryStateOnSurface projected_hit_state = thePropagator->propagate(hit_state, det.surface());
        if (!projected_hit_state.isValid()) return InvalidTransientRecHit::build(hit->det());   
        LocalPoint p = projected_hit_state.localPosition();
        LocalError e = projected_hit_state.localError().positionError();
        //      LogTrace("SiTrackerMultiRecHitUpdator") << "position: "<<p<<" error: "<<e<<std::endl;
        //AlgebraicSymMatrix55 projm=projected_hit_state.localError().matrix();   
        //      for(int i=0;i<5;i++){
        //      LogTrace("SiTrackerMultiRecHitUpdator") <<"cov matrix: "<<projm<<std::endl;
        //      }
        return ResultingHit::build(p, e, &det, updatedOriginal->det(), updatedOriginal, this);
    }

Member Data Documentation

const AnalyticalPropagator* TrackingRecHitPropagator::thePropagator

private

Definition at line 69 of file TrackingRecHitPropagator.h.

Referenced by project(), TrackingRecHitPropagator(), and ~TrackingRecHitPropagator().