#include <LocalTrajectoryParameters.h>

Public Member Functions
float	absdz () const

TrackCharge	charge () const
	Charge (-1, 0 or 1) More...

LocalVector	direction () const
	Momentum vector unit in the local frame. More...

LocalVector	directionNotNormalized () const
	Momentum vector unit in the local frame. More...

float	dxdz () const

float	dydz () const

	LocalTrajectoryParameters ()

	LocalTrajectoryParameters (const AlgebraicVector5 &v, float aPzSign, bool charged=true)

	LocalTrajectoryParameters (const LocalPoint &pos, const LocalVector &p, TrackCharge charge)
	Constructor from local position, momentum and charge. More...

	LocalTrajectoryParameters (float aQbp, float aDxdz, float aDydz, float aX, float aY, float aPzSign, bool charged=true)

AlgebraicVector5	mixedFormatVector () const

LocalVector	momentum () const
	Momentum vector in the local frame. More...

LocalPoint	position () const
	Local x and y position coordinates. More...

float	pzSign () const
	Sign of the z-component of the momentum in the local frame. More...

float	qbp () const

float	signedInverseMomentum () const
	Signed inverse momentum q/p (zero for neutrals). More...

bool	updateP (float dP)
	Update of momentum by a scalar dP. More...

AlgebraicVector5	vector () const

Private Attributes
short	theCharge
	charge More...

float	theDxdz
	tangent of direction in local x vs. z More...

float	theDydz
	tangent of direction in local y vs. z More...

short	thePzSign
	sign of local pz More...

float	theQbp
	q/p (charged) or 1/p (neutral) More...

float	theX
	local x position More...

float	theY
	local y position More...

Detailed Description

Class providing access to a set of relevant parameters of a trajectory in a local, Cartesian frame. The set consists of the following parameters:

q/p : charged particles: charge (plus or minus one) divided by magnitude of momentum
neutral particles: inverse magnitude of momentum
dxdz : direction tangent in local xz-plane
dydz : direction tangent in local yz-plane
x : local x-coordinate
y : local y-coordinate

In addition, the sign of local p_z is needed to fully define the direction of the track in this local frame.

Definition at line 25 of file LocalTrajectoryParameters.h.

Constructor & Destructor Documentation

◆ LocalTrajectoryParameters() [1/4]

LocalTrajectoryParameters::LocalTrajectoryParameters ( )

inline

Definition at line 29 of file LocalTrajectoryParameters.h.

29 {}

◆ LocalTrajectoryParameters() [2/4]

LocalTrajectoryParameters::LocalTrajectoryParameters	(	const AlgebraicVector5 &	v,
		float	aPzSign,
		bool	charged = `true`
	)

inline

Constructor from vector of parameters.

Expects a vector of parameters as defined above, plus the sign of p_z. For charged particles the charge will be determined by the sign of the first element. For neutral particles the last argument should be false, in which case the charge of the first element will be neglected.

Definition at line 38 of file LocalTrajectoryParameters.h.

                                                                                            {
     theQbp = v[0];
     theDxdz = v[1];
     theDydz = v[2];
     theX = v[3];
     theY = v[4];
     thePzSign = aPzSign;
     if (charged)
       theCharge = theQbp > 0 ? 1 : -1;
     else
       theCharge = 0;
   }

References theCharge, theDxdz, theDydz, thePzSign, theQbp, theX, theY, and findQualityFiles::v.

◆ LocalTrajectoryParameters() [3/4]

LocalTrajectoryParameters::LocalTrajectoryParameters	(	float	aQbp,
		float	aDxdz,
		float	aDydz,
		float	aX,
		float	aY,
		float	aPzSign,
		bool	charged = `true`
	)

inline

Constructor from individual parameters.

Expects parameters as defined above, plus the sign of p_z. For charged particles the charge will be determined by the sign of the first argument. For neutral particles the last argument should be false, in which case the charge of the first argument will be neglected.

Definition at line 58 of file LocalTrajectoryParameters.h.

       : theDxdz(aDxdz), theDydz(aDydz), theX(aX), theY(aY), thePzSign(aPzSign > 0 ? 1 : -1) {
     if (charged) {
       theQbp = aQbp;
       theCharge = theQbp > 0 ? 1 : -1;
     } else {
       theQbp = aQbp;
       theCharge = 0;
     }
   }

References theCharge, and theQbp.

◆ LocalTrajectoryParameters() [4/4]

LocalTrajectoryParameters::LocalTrajectoryParameters	(	const LocalPoint &	pos,
		const LocalVector &	p,
		TrackCharge	charge
	)

inline

Constructor from local position, momentum and charge.

Definition at line 70 of file LocalTrajectoryParameters.h.

       : theQbp(charge / p.mag()),
         theDxdz(p.x() / p.z()),
         theDydz(p.y() / p.z()),
         theX(pos.x()),
         theY(pos.y()),
         thePzSign(p.z() > 0. ? 1 : -1),
         theCharge(charge) {
     if (charge == 0)
       theQbp = 1.f / p.mag();
   }

References charge(), AlCaHLTBitMon_ParallelJobs::p, and theQbp.

Member Function Documentation

◆ absdz()

float LocalTrajectoryParameters::absdz ( ) const

inline

Definition at line 161 of file LocalTrajectoryParameters.h.

161 { return 1.f / std::sqrt(1.f + theDxdz * theDxdz + theDydz * theDydz); }

References f, mathSSE::sqrt(), theDxdz, and theDydz.

◆ charge()

TrackCharge LocalTrajectoryParameters::charge ( ) const

inline

Charge (-1, 0 or 1)

Definition at line 110 of file LocalTrajectoryParameters.h.

110 { return theCharge; }

References theCharge.

Referenced by BzeroReferenceTrajectory::BzeroReferenceTrajectory(), reco::ElectronSeed::getCharge(), JacobianCartesianToLocal::JacobianCartesianToLocal(), JacobianLocalToCartesian::JacobianLocalToCartesian(), LocalTrajectoryParameters(), operator<<(), PrintRecoObjects::print(), SeedProducerFromSoA::produce(), PixelTrackProducerFromSoA::produce(), and signedInverseMomentum().

◆ direction()

LocalVector LocalTrajectoryParameters::direction ( ) const

inline

Momentum vector unit in the local frame.

Definition at line 99 of file LocalTrajectoryParameters.h.

                                 {
     float dz = float(thePzSign) / std::sqrt(1.f + theDxdz * theDxdz + theDydz * theDydz);
     float dx = dz * theDxdz;
     float dy = dz * theDydz;
     return LocalVector(dx, dy, dz);
   }

References PVValHelper::dx, PVValHelper::dy, PVValHelper::dz, f, dqmMemoryStats::float, mathSSE::sqrt(), theDxdz, theDydz, and thePzSign.

Referenced by JacobianCurvilinearToLocal::JacobianCurvilinearToLocal(), and JacobianLocalToCurvilinear::JacobianLocalToCurvilinear().

◆ directionNotNormalized()

LocalVector LocalTrajectoryParameters::directionNotNormalized ( ) const

inline

Momentum vector unit in the local frame.

Definition at line 107 of file LocalTrajectoryParameters.h.

107 { return LocalVector(theDxdz, theDydz, 1.f); }

References f, theDxdz, and theDydz.

Referenced by StripCPE::getAlgoParam().

◆ dxdz()

float LocalTrajectoryParameters::dxdz ( ) const

inline

Definition at line 159 of file LocalTrajectoryParameters.h.

159 { return theDxdz; }

References theDxdz.

Referenced by PixelCPEBase::computeAnglesFromTrajectory(), and JacobianLocalToCartesian::JacobianLocalToCartesian().

◆ dydz()

float LocalTrajectoryParameters::dydz ( ) const

inline

Definition at line 160 of file LocalTrajectoryParameters.h.

160 { return theDydz; }

References theDydz.

Referenced by PixelCPEBase::computeAnglesFromTrajectory(), and JacobianLocalToCartesian::JacobianLocalToCartesian().

◆ mixedFormatVector()

AlgebraicVector5 LocalTrajectoryParameters::mixedFormatVector ( ) const

inline

Vector of parameters in internal representation.

Vector of parameters as defined above, with the first element = q/p for charged and = 1/p for neutral.

Definition at line 135 of file LocalTrajectoryParameters.h.

                                              {
     AlgebraicVector5 v;
     v[0] = theQbp;  // signed in case of charged particles, 1/p for neutrals
     v[1] = theDxdz;
     v[2] = theDydz;
     v[3] = theX;
     v[4] = theY;
     return v;
   }

References theDxdz, theDydz, theQbp, theX, theY, and findQualityFiles::v.

Referenced by BzeroReferenceTrajectory::BzeroReferenceTrajectory(), SiStripBackplaneCalibration::derivatives(), TwoBowedSurfacesAlignmentParameters::derivatives(), DualBzeroReferenceTrajectory::extractParameters(), DualReferenceTrajectory::extractParameters(), SegmentAlignmentDerivatives4D::operator()(), KarimakiAlignmentDerivatives::operator()(), BowedSurfaceAlignmentDerivatives::operator()(), operator<<(), and ReferenceTrajectory::ReferenceTrajectory().

◆ momentum()

LocalVector LocalTrajectoryParameters::momentum ( ) const

inline

Momentum vector in the local frame.

Definition at line 88 of file LocalTrajectoryParameters.h.

                                {
     float op = std::abs(theQbp);
     if (op < 1.e-9f)
       op = 1.e-9f;
     float pz = float(thePzSign) / (op * std::sqrt(1.f + theDxdz * theDxdz + theDydz * theDydz));
     float px = pz * theDxdz;
     float py = pz * theDydz;
     return LocalVector(px, py, pz);
   }

References funct::abs(), MillePedeFileConverter_cfg::e, f, dqmMemoryStats::float, multPhiCorr_741_25nsDY_cfi::px, multPhiCorr_741_25nsDY_cfi::py, mathSSE::sqrt(), theDxdz, theDydz, thePzSign, and theQbp.

Referenced by SiPixelTrackResidualSource::analyze(), SiPixelErrorEstimation::analyze(), TwoBodyDecayTrajectory::constructSingleTsosWithErrors(), SiPixelHitEfficiencyModule::fill(), JacobianCartesianToLocal::JacobianCartesianToLocal(), BasicTrajectoryState::localMomentum(), StripCPEgeometric::localParameters(), PrintRecoObjects::print(), SeedProducerFromSoA::produce(), PixelTrackProducerFromSoA::produce(), and TrackInfoProducerAlgorithm::run().

◆ position()

LocalPoint LocalTrajectoryParameters::position ( ) const

inline

Local x and y position coordinates.

Definition at line 85 of file LocalTrajectoryParameters.h.

85 { return LocalPoint(theX, theY); }

References theX, and theY.

Referenced by PixelCPEBase::computeAnglesFromTrajectory(), OutInConversionSeedFinder::createSeed(), SiPixelHitEfficiencyModule::fill(), KFTrajectoryFitter::fitOne(), StripCPE::getAlgoParam(), JacobianCurvilinearToLocal::JacobianCurvilinearToLocal(), JacobianLocalToCurvilinear::JacobianLocalToCurvilinear(), StripCPEgeometric::localParameters(), BasicTrajectoryState::localPosition(), SeedProducerFromSoA::produce(), PixelTrackProducerFromSoA::produce(), and TrackInfoProducerAlgorithm::run().

◆ pzSign()

float LocalTrajectoryParameters::pzSign ( ) const

inline

Sign of the z-component of the momentum in the local frame.

Definition at line 146 of file LocalTrajectoryParameters.h.

146 { return thePzSign; }

References thePzSign.

Referenced by BzeroReferenceTrajectory::BzeroReferenceTrajectory(), TrajectoryStateCombiner::combine(), JacobianLocalToCartesian::JacobianLocalToCartesian(), GlobalTrackerMuonAlignment::misalignMuonL(), multiTrajectoryStateMode::momentumFromModeLocal(), GsfTrackProducerBase::putInEvt(), MultiGaussianStateTransform::tsosFromSingleState(), and KFStrip1DUpdator::update().

◆ qbp()

float LocalTrajectoryParameters::qbp ( ) const

inline

Definition at line 158 of file LocalTrajectoryParameters.h.

158 { return theQbp; }

References theQbp.

Referenced by KFTrajectoryFitter::fitOne(), and JacobianLocalToCartesian::JacobianLocalToCartesian().

◆ signedInverseMomentum()

float LocalTrajectoryParameters::signedInverseMomentum ( ) const

inline

Signed inverse momentum q/p (zero for neutrals).

Definition at line 113 of file LocalTrajectoryParameters.h.

113 { return charge() == 0 ? 0.f : theQbp; }

References charge(), and theQbp.

Referenced by ReferenceTrajectory::construct(), TwoBodyDecayTrajectory::constructSingleTsosWithErrors(), JacobianCurvilinearToLocal::JacobianCurvilinearToLocal(), JacobianLocalToCurvilinear::JacobianLocalToCurvilinear(), NuclearInteractionFinder::rescaleError(), and vector().

◆ updateP()

bool LocalTrajectoryParameters::updateP ( float dP )

inline

Update of momentum by a scalar dP.

Definition at line 149 of file LocalTrajectoryParameters.h.

                          {
     float p = 1.f / std::abs(theQbp);
     if ((p += dP) <= 0.f)
       return false;
     float newQbp = theQbp > 0. ? 1.f / p : -1.f / p;
     theQbp = newQbp;
     return true;
   }

References funct::abs(), f, AlCaHLTBitMon_ParallelJobs::p, and theQbp.

Referenced by GsfMaterialEffectsUpdator::updateState(), and MaterialEffectsUpdator::updateStateInPlace().

◆ vector()

AlgebraicVector5 LocalTrajectoryParameters::vector ( ) const

inline

Vector of parameters with signed inverse momentum.

Vector of parameters as defined above, with the first element = q/p .

Definition at line 120 of file LocalTrajectoryParameters.h.

                                   {
     AlgebraicVector5 v;
     v[0] = signedInverseMomentum();
     v[1] = theDxdz;
     v[2] = theDydz;
     v[3] = theX;
     v[4] = theY;
     return v;
   }