TangentApproachInRPhi Class Reference

#include <TangentApproachInRPhi.h>

Inheritance diagram for TangentApproachInRPhi:

Public Member Functions
virtual bool	calculate (const TrajectoryStateOnSurface &sta, const TrajectoryStateOnSurface &stb)
virtual bool	calculate (const FreeTrajectoryState &sta, const FreeTrajectoryState &stb)
virtual TangentApproachInRPhi *	clone () const
virtual GlobalPoint	crossingPoint () const
virtual float	distance () const
float	perpdist () const
virtual std::pair< GlobalPoint, GlobalPoint >	points () const
virtual bool	status () const
	TangentApproachInRPhi ()
std::pair < GlobalTrajectoryParameters, GlobalTrajectoryParameters >	trajectoryParameters () const
Public Member Functions inherited from ClosestApproachOnHelices
	ClosestApproachOnHelices ()
virtual	~ClosestApproachOnHelices ()

Private Member Functions
bool	calculate (const TrackCharge &chargeA, const GlobalVector &momentumA, const GlobalPoint &positionA, const TrackCharge &chargeB, const GlobalVector &momentumB, const GlobalPoint &positionB, const MagneticField &magField)
void	circleParameters (const TrackCharge &charge, const GlobalVector &momemtum, const GlobalPoint &position, double &xc, double &yc, double &r, const MagneticField &magField) const
GlobalTrajectoryParameters	trajectoryParameters (const GlobalPoint &newpt, const GlobalTrajectoryParameters &oldpar) const
int	transverseCoord (double cxa, double cya, double ra, double cxb, double cyb, double rb, double &xg1, double &yg1, double &xg2, double &yg2) const
double	zCoord (const GlobalVector &mom, const GlobalPoint &pos, double r, double xc, double yc, double xg, double yg) const

Private Attributes
bool	intersection_
GlobalTrajectoryParameters	paramA
GlobalTrajectoryParameters	paramB
GlobalPoint	posA
GlobalPoint	posB
bool	status_

Detailed Description

Given two trajectory states, computes the two points of tangent approach in the transverse plane for the helices extrapolated from these states. 1) computes the tangent points of the circles in transverse plane. Two cases: - Whether or not the circles intersect the points used are the points of tangent approach of the two circles. 2) computes the corresponding z-coordinates.

Definition at line 15 of file TangentApproachInRPhi.h.

Constructor & Destructor Documentation

TangentApproachInRPhi::TangentApproachInRPhi ( )

inline

Definition at line 19 of file TangentApproachInRPhi.h.

References intersection_, and status_.

Referenced by clone().

{status_ = false; intersection_ = false;}

Member Function Documentation

bool TangentApproachInRPhi::calculate ( const TrajectoryStateOnSurface &  sta, const TrajectoryStateOnSurface &  stb  )

virtual

Implements ClosestApproachOnHelices.

Definition at line 7 of file TangentApproachInRPhi.cc.

bool TangentApproachInRPhi::calculate ( const FreeTrajectoryState &  sta, const FreeTrajectoryState &  stb  )

virtual

Implements ClosestApproachOnHelices.

Definition at line 23 of file TangentApproachInRPhi.cc.

bool TangentApproachInRPhi::calculate ( const TrackCharge &  chargeA, const GlobalVector &  momentumA, const GlobalPoint &  positionA, const TrackCharge &  chargeB, const GlobalVector &  momentumB, const GlobalPoint &  positionB, const MagneticField &  magField  )

private

Definition at line 80 of file TangentApproachInRPhi.cc.

void TangentApproachInRPhi::circleParameters ( const TrackCharge &  charge, const GlobalVector &  momemtum, const GlobalPoint &  position, double &  xc, double &  yc, double &  r, const MagneticField &  magField  ) const

private

temporary code, to be replaced by call to curvature() when bug is fixed.

end of temporary code

Definition at line 165 of file TangentApproachInRPhi.cc.

virtual TangentApproachInRPhi* TangentApproachInRPhi::clone ( void  ) const

inlinevirtual

Clone method

Implements ClosestApproachOnHelices.

Definition at line 51 of file TangentApproachInRPhi.h.

References TangentApproachInRPhi().

                                                {
    return new TangentApproachInRPhi(* this);
  }

GlobalPoint TangentApproachInRPhi::crossingPoint ( ) const

virtual

arithmetic mean of the two points of closest approach

Implements ClosestApproachOnHelices.

Definition at line 47 of file TangentApproachInRPhi.cc.

float TangentApproachInRPhi::distance ( ) const

virtual

distance between the two points of closest approach in 3D

Implements ClosestApproachOnHelices.

Definition at line 57 of file TangentApproachInRPhi.cc.

float TangentApproachInRPhi::perpdist

(

)

const

signed distance between two points of closest approach in r-phi plane (-ive if circles intersect)

Definition at line 64 of file TangentApproachInRPhi.cc.

pair< GlobalPoint, GlobalPoint > TangentApproachInRPhi::points ( ) const

virtual

Returns the two PCA on the trajectories.

Implements ClosestApproachOnHelices.

Definition at line 38 of file TangentApproachInRPhi.cc.

virtual bool TangentApproachInRPhi::status ( void  ) const

inlinevirtual

Implements ClosestApproachOnHelices.

Definition at line 27 of file TangentApproachInRPhi.h.

References status_.

{return status_;}

pair< GlobalTrajectoryParameters, GlobalTrajectoryParameters > TangentApproachInRPhi::trajectoryParameters

(

)

const

Returns not only the points, but the full GlobalTrajectoryParemeters at the points of closest approach

Definition at line 126 of file TangentApproachInRPhi.cc.

GlobalTrajectoryParameters TangentApproachInRPhi::trajectoryParameters ( const GlobalPoint &  newpt, const GlobalTrajectoryParameters &  oldpar  ) const

private

Definition at line 136 of file TangentApproachInRPhi.cc.

int TangentApproachInRPhi::transverseCoord ( double  cxa, double  cya, double  ra, double  cxb, double  cyb, double  rb, double &  xg1, double &  yg1, double &  xg2, double &  yg2  ) const

private

Definition at line 195 of file TangentApproachInRPhi.cc.

double TangentApproachInRPhi::zCoord ( const GlobalVector &  mom, const GlobalPoint &  pos, double  r, double  xc, double  yc, double  xg, double  yg  ) const

private

Definition at line 271 of file TangentApproachInRPhi.cc.

Member Data Documentation

bool TangentApproachInRPhi::intersection_

private

Definition at line 100 of file TangentApproachInRPhi.h.

Referenced by TangentApproachInRPhi().

GlobalTrajectoryParameters TangentApproachInRPhi::paramA

private

Definition at line 99 of file TangentApproachInRPhi.h.

GlobalTrajectoryParameters TangentApproachInRPhi::paramB

private

Definition at line 99 of file TangentApproachInRPhi.h.

GlobalPoint TangentApproachInRPhi::posA

private

Definition at line 98 of file TangentApproachInRPhi.h.

GlobalPoint TangentApproachInRPhi::posB

private

Definition at line 98 of file TangentApproachInRPhi.h.

bool TangentApproachInRPhi::status_

private

Definition at line 97 of file TangentApproachInRPhi.h.

Referenced by status(), and TangentApproachInRPhi().