GlobalTrajectoryParameters Class Reference

#include <GlobalTrajectoryParameters.h>

Public Member Functions
TrackCharge	charge () const
	GlobalTrajectoryParameters ()
	GlobalTrajectoryParameters (const GlobalPoint &aX, const GlobalVector &aP, TrackCharge aCharge, const MagneticField *fieldProvider)
	GlobalTrajectoryParameters (const GlobalPoint &aX, const GlobalVector &direction, double transverseCurvature, int, const MagneticField *fieldProvider)
const MagneticField &	magneticField () const
GlobalVector	magneticFieldInInverseGeV (const GlobalPoint &x) const
GlobalVector	momentum () const
GlobalPoint	position () const
double	signedInverseMomentum () const
double	signedInverseTransverseMomentum () const
double	transverseCurvature () const
AlgebraicVector6	vector () const
AlgebraicVector	vector_old () const

Private Attributes
double	cachedCurvature_
bool	hasCurvature_
TrackCharge	theCharge
const MagneticField *	theField
GlobalVector	theP
GlobalPoint	theX

Detailed Description

Class providing access to a set of relevant parameters of a trajectory in the global, Cartesian frame. The basic data members used to calculate these parameters are the charge and global position and momentum.

Definition at line 16 of file GlobalTrajectoryParameters.h.

Constructor & Destructor Documentation

GlobalTrajectoryParameters::GlobalTrajectoryParameters ( )

inline

Definition at line 19 of file GlobalTrajectoryParameters.h.

                               : 
    theX(), theP(), theCharge(0), theField(0),
    hasCurvature_(false), cachedCurvature_(1.0) {} // we must initialize cache to non-NAN to avoid FPE

GlobalTrajectoryParameters::GlobalTrajectoryParameters ( const GlobalPoint &  aX, const GlobalVector &  aP, TrackCharge  aCharge, const MagneticField *  fieldProvider  )

inline

Constructing class from global position, global momentum and charge.

Definition at line 26 of file GlobalTrajectoryParameters.h.

                                                     :
    theX(aX), theP(aP), theCharge(aCharge), theField(fieldProvider),
    hasCurvature_(false), cachedCurvature_(1.0) {} // we must initialize cache to non-NAN to avoid FPE

GlobalTrajectoryParameters::GlobalTrajectoryParameters	(	const GlobalPoint &	aX,
		const GlobalVector &	direction,
		double	transverseCurvature,
		int	,
		const MagneticField *	fieldProvider
	)

Constructing class from global position, direction (unit length) and transverse curvature. The fourth int argument is dummy, it serves only to distinguish this constructor from the one above.

Definition at line 4 of file GlobalTrajectoryParameters.cc.

References MagneticField::inTesla(), PV3DBase< T, PVType, FrameType >::perp(), theCharge, theField, theP, theX, and PV3DBase< T, PVType, FrameType >::z().

                                                                   :
  theX(aX), theField(fieldProvider), hasCurvature_(true), cachedCurvature_(transverseCurvature)
{
  double bza = -2.99792458e-3 * theField->inTesla(theX).z();
  double qbp = transverseCurvature/bza*direction.perp();
  theP = direction*fabs(1./qbp);
  theCharge = qbp > 0. ? 1 : -1;
}

Member Function Documentation

TrackCharge GlobalTrajectoryParameters::charge ( void  ) const

inline

Charge q of particle, either +1 or -1.

Definition at line 61 of file GlobalTrajectoryParameters.h.

References theCharge.

Referenced by cms::DiMuonSeedGeneratorHIC::barrelUpdateSeed(), TwoTrackMinimumDistanceLineLine::calculate(), TwoTrackMinimumDistance::calculate(), FreeTrajectoryState::charge(), HICTrajectoryCorrector::correct(), MuonPatternRecoDumper::dumpFTS(), HICTrajectoryBuilder::findCompatibleMeasurements(), HICTrajectoryCorrector::findPhiInVertex(), HICMuonUpdator::findPhiInVertex(), cms::DiMuonSeedGeneratorHIC::forwardUpdateSeed(), SeedFromConsecutiveHitsCreator::initialKinematic(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectoryFromTriplet(), JacobianCartesianToCurvilinear::JacobianCartesianToCurvilinear(), JacobianCurvilinearToCartesian::JacobianCurvilinearToCartesian(), ClosestApproachInRPhi::newTrajectory(), TwoTrackMinimumDistance::pointsHelixHelix(), SimpleCosmicBONSeeder::pqFromHelixFit(), ConvBremSeedProducer::produce(), cms::FastMuPropagator::propagate(), NavPropagator::propagateInVolume(), NavPropagator::propagateWithPath(), SeedGeneratorForCosmics::seeds(), TangentApproachInRPhi::trajectoryParameters(), HICMuonUpdator::updateBarrel(), and TwoTrackMinimumDistanceHelixHelix::updateCoeffs().

                             {
    return theCharge;
  }

const MagneticField& GlobalTrajectoryParameters::magneticField ( ) const

inline

Definition at line 108 of file GlobalTrajectoryParameters.h.

References theField.

Referenced by TransientTrackKinematicStateBuilder::buildState(), TangentApproachInRPhi::calculate(), ClosestApproachInRPhi::calculate(), TwoTrackMinimumDistanceLineLine::calculate(), TwoTrackMinimumDistance::calculate(), TrajectoryStateCombiner::combine(), TSCPBuilderNoMaterial::createFTSatTransverseImpactPointCharged(), TSCPBuilderNoMaterial::createFTSatTransverseImpactPointNeutral(), PerigeeConversions::ftsToPerigeeParameters(), PerigeeConversions::jacobianCurvilinear2Perigee(), PerigeeConversions::jacobianPerigee2Curvilinear(), ClosestApproachInRPhi::newTrajectory(), TrajectoryStateWithArbitraryError::operator()(), TrackKinematicStatePropagator::planeCrossing(), RecHitPropagator::propagate(), NuclearInteractionFinder::rescaleError(), TangentApproachInRPhi::trajectoryParameters(), TrajectoryStateClosestToPoint::TrajectoryStateClosestToPoint(), PerigeeRefittedTrackState::trajectoryStateOnSurface(), GsfMultiStateUpdator::update(), KFStrip1DUpdator::update(), KFStripUpdator::update(), TwoTrackMinimumDistanceHelixHelix::updateCoeffs(), GsfMaterialEffectsUpdator::updateState(), VolumeMaterialEffectsUpdator::updateState(), and MaterialEffectsUpdator::updateStateInPlace().

{return *theField;}

GlobalVector GlobalTrajectoryParameters::magneticFieldInInverseGeV

(

const GlobalPoint &

x

)

const

Definition at line 26 of file GlobalTrajectoryParameters.cc.

References MagneticField::inTesla(), and theField.

Referenced by ReferenceTrajectory::addMaterialEffectsBrl(), AnalyticalCurvilinearJacobian::AnalyticalCurvilinearJacobian(), AnalyticalErrorPropagation::operator()(), operator<<(), and FreeTrajectoryState::rescaleError().

{
  return 2.99792458e-3 * theField->inTesla(x);
}

GlobalVector GlobalTrajectoryParameters::momentum ( ) const

inline

Global momentum.

Definition at line 54 of file GlobalTrajectoryParameters.h.

References theP.

Referenced by ReferenceTrajectory::addMaterialEffectsBrl(), cms::DiMuonSeedGeneratorHIC::barrelUpdateSeed(), MuonTrackLoader::buildTrackExtra(), TwoTrackMinimumDistanceLineLine::calculate(), VZeroFinder::checkTrackPair(), TkGluedMeasurementDet::collectRecHits(), AnalyticalCurvilinearJacobian::computeFullJacobian(), AnalyticalCurvilinearJacobian::computeInfinitesimalJacobian(), AnalyticalCurvilinearJacobian::computeStraightLineJacobian(), convert(), HICTrajectoryCorrector::correct(), cms::HICSeedMeasurementEstimator::estimate(), HICTrajectoryBuilder::findCompatibleMeasurements(), cms::HICTkOuterStartingLayerFinder::findForwardLayers(), HICTrajectoryCorrector::findPhiInVertex(), HICMuonUpdator::findPhiInVertex(), cms::DiMuonSeedGeneratorHIC::forwardUpdateSeed(), NuclearTrackCorrector::getNewTrackExtra(), SeedFromConsecutiveHitsCreator::initialKinematic(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectoryFromTriplet(), JacobianCartesianToCurvilinear::JacobianCartesianToCurvilinear(), PerigeeConversions::jacobianCurvilinear2Perigee(), JacobianCurvilinearToCartesian::JacobianCurvilinearToCartesian(), PerigeeConversions::jacobianPerigee2Curvilinear(), FreeTrajectoryState::momentum(), ClosestApproachInRPhi::newTrajectory(), AnalyticalErrorPropagation::operator()(), TwoTrackMinimumDistance::pointsHelixHelix(), SimpleCosmicBONSeeder::pqFromHelixFit(), SoftConversionProducer::produce(), ConvBremSeedProducer::produce(), TrackingRecHitProjector< ResultingHit >::project(), cms::HICMuonPropagator::propagate(), cms::FastMuPropagator::propagate(), AnalyticalPropagator::propagatedStateWithPath(), KfTrackProducerBase::putInEvt(), GsfTrackProducerBase::putInEvt(), TrackProducerWithSCAssociation::putInEvt(), KalmanAlignmentTrackRefitter::refitSingleTracklet(), SeedGeneratorForCosmics::seeds(), TkGluedMeasurementDet::testStrips(), TangentApproachInRPhi::trajectoryParameters(), SeedFromConsecutiveHitsCreator::trajectorySeed(), and TwoTrackMinimumDistanceHelixHelix::updateCoeffs().

                                {
    return theP;
  }

GlobalPoint GlobalTrajectoryParameters::position ( ) const

inline

Global position.

Definition at line 47 of file GlobalTrajectoryParameters.h.

References theX.

Referenced by ReferenceTrajectory::addMaterialEffectsBrl(), AnalyticalCurvilinearJacobian::AnalyticalCurvilinearJacobian(), cms::DiMuonSeedGeneratorHIC::barrelUpdateSeed(), MuonTrackLoader::buildTrackExtra(), TwoTrackMinimumDistanceHelixHelix::calculate(), TwoTrackMinimumDistanceLineLine::calculate(), TwoTrackMinimumDistance::calculate(), cms::FastMuPropagator::checkfts(), PixelHitMatcher::compatibleSeeds(), AnalyticalCurvilinearJacobian::computeFullJacobian(), convert(), HICTrajectoryCorrector::correct(), cms::HICSeedMeasurementEstimator::estimate(), ConversionForwardEstimator::estimate(), ConversionBarrelEstimator::estimate(), ForwardMeasurementEstimator::estimate(), BarrelMeasurementEstimator::estimate(), AnalyticalImpactPointExtrapolator::extrapolateSingleState(), AnalyticalTrajectoryExtrapolatorToLine::extrapolateSingleState(), TwoTrackMinimumDistanceHelixHelix::finalPoints(), HICTrajectoryBuilder::findCompatibleMeasurements(), cms::HICTkOuterStartingLayerFinder::findForwardLayers(), HICTrajectoryCorrector::findPhiInVertex(), HICMuonUpdator::findPhiInVertex(), cms::DiMuonSeedGeneratorHIC::forwardUpdateSeed(), NuclearTrackCorrector::getNewTrackExtra(), SeedFromConsecutiveHitsCreator::initialKinematic(), RoadSearchTrackCandidateMakerAlgorithm::initialTrajectoryFromTriplet(), PerigeeConversions::jacobianPerigee2Curvilinear(), ClosestApproachInRPhi::newTrajectory(), AnalyticalErrorPropagation::operator()(), TwoTrackMinimumDistance::pointsHelixHelix(), FreeTrajectoryState::position(), SoftConversionProducer::produce(), ConvBremSeedProducer::produce(), cms::HICMuonPropagator::propagate(), cms::FastMuPropagator::propagate(), AnalyticalPropagator::propagatedStateWithPath(), TauTagTools::propagTrackECALSurfContactPoint(), KfTrackProducerBase::putInEvt(), GsfTrackProducerBase::putInEvt(), TrackProducerWithSCAssociation::putInEvt(), cms::HICTkOuterStartingLayerFinder::startingLayers(), TangentApproachInRPhi::trajectoryParameters(), and TwoTrackMinimumDistanceHelixHelix::updateCoeffs().

                               {
    return theX;
  }

double GlobalTrajectoryParameters::signedInverseMomentum ( ) const

inline

Charge divided by (magnitude of) momentum, i.e. q/p.

Definition at line 68 of file GlobalTrajectoryParameters.h.

References PV3DBase< T, PVType, FrameType >::mag(), theCharge, and theP.

Referenced by AnalyticalCurvilinearJacobian::computeFullJacobian(), AnalyticalCurvilinearJacobian::computeInfinitesimalJacobian(), PerigeeConversions::jacobianPerigee2Curvilinear(), and FreeTrajectoryState::signedInverseMomentum().

                                       {
    return theCharge/theP.mag();
  }

double GlobalTrajectoryParameters::signedInverseTransverseMomentum ( ) const

inline

Charge divided by transverse momentum, i.e. q/p_T.

Definition at line 75 of file GlobalTrajectoryParameters.h.

References PV3DBase< T, PVType, FrameType >::perp(), theCharge, and theP.

Referenced by transverseCurvature().

                                                 {
    return theCharge/theP.perp();
  }

double GlobalTrajectoryParameters::transverseCurvature

(

)

const

Transverse curvature kappa (which is the inverse radius of curvature in the transverse plane) in cm^{-1}. Sign convention is such that positive kappa means counterclockwise rotation of the track with respect to the global z-axis.

Definition at line 16 of file GlobalTrajectoryParameters.cc.

References cachedCurvature_, hasCurvature_, MagneticField::inTesla(), signedInverseTransverseMomentum(), theField, theX, and PV3DBase< T, PVType, FrameType >::z().

Referenced by AnalyticalCurvilinearJacobian::AnalyticalCurvilinearJacobian(), PerigeeConversions::jacobianPerigee2Curvilinear(), and FreeTrajectoryState::transverseCurvature().

{
  if (!hasCurvature_) {
      double bza = -2.99792458e-3 * theField->inTesla(theX).z();
      cachedCurvature_ = bza*signedInverseTransverseMomentum();
      hasCurvature_ = true;
  }
  return cachedCurvature_;
}

AlgebraicVector6 GlobalTrajectoryParameters::vector ( ) const

inline

Vector whose first three elements are the global position coordinates and whose last three elements are the global momentum coordinates.

Definition at line 90 of file GlobalTrajectoryParameters.h.

References theP, theX, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by GlobalTrackerMuonAlignment::debugTrajectorySOS(), GlobalTrackerMuonAlignment::debugTrajectorySOSv(), operator<<(), ThresholdPtTrajectoryFilter::test(), MinPtTrajectoryFilter::test(), and vector_old().

                                  {
    //AlgebraicVector6 v;
    //v[0] = theX.x();
    //v[1] = theX.y();
    //v[2] = theX.z();
    //v[3] = theP.x();
    //v[4] = theP.y();
    //v[5] = theP.z();
    return AlgebraicVector6(theX.x(),theX.y(),theX.z(),theP.x(),theP.y(),theP.z());
  }

AlgebraicVector GlobalTrajectoryParameters::vector_old ( ) const

inline

Vector whose first three elements are the global position coordinates and whose last three elements are the global momentum coordinates.

Definition at line 105 of file GlobalTrajectoryParameters.h.

References asHepVector(), and vector().

{ return asHepVector(vector());  }

Member Data Documentation

double GlobalTrajectoryParameters::cachedCurvature_

mutableprivate

Definition at line 115 of file GlobalTrajectoryParameters.h.

Referenced by transverseCurvature().

bool GlobalTrajectoryParameters::hasCurvature_

mutableprivate

Definition at line 115 of file GlobalTrajectoryParameters.h.

Referenced by transverseCurvature().

TrackCharge GlobalTrajectoryParameters::theCharge

private

Definition at line 113 of file GlobalTrajectoryParameters.h.

Referenced by charge(), GlobalTrajectoryParameters(), signedInverseMomentum(), and signedInverseTransverseMomentum().

const MagneticField* GlobalTrajectoryParameters::theField

private

Definition at line 114 of file GlobalTrajectoryParameters.h.

Referenced by GlobalTrajectoryParameters(), magneticField(), magneticFieldInInverseGeV(), and transverseCurvature().

GlobalVector GlobalTrajectoryParameters::theP

private

Definition at line 112 of file GlobalTrajectoryParameters.h.

Referenced by GlobalTrajectoryParameters(), momentum(), signedInverseMomentum(), signedInverseTransverseMomentum(), and vector().

GlobalPoint GlobalTrajectoryParameters::theX

private

Definition at line 111 of file GlobalTrajectoryParameters.h.

Referenced by GlobalTrajectoryParameters(), position(), transverseCurvature(), and vector().