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Helix Class Reference

Helix class. More...

#include <Helix.h>

List of all members.

Public Methods
	Helix ()
	Default Constructor.
	Helix (const Helix &h)
	Copy Constructor.
	Helix (const HepPoint3D &pivot, const HepVector &a, const HepSymMatrix &Ea)
	Constructor with pivot, helix parameter a, and its error matrix.
	Helix (const HepPoint3D &pivot, const HepVector &a)
	Constructor without error matrix.
	Helix (const HepPoint3D &position, const Hep3Vector &momentum, double charge)
	Constructor with position, momentum, and charge.
virtual	~Helix ()
	Destructor.
const HepPoint3D &	center (void) const
	returns position of helix center(z = 0.);.
const HepPoint3D &	pivot (void) const
	returns pivot position.
double	radius (void) const
	returns radious of helix.
HepPoint3D	x (double dPhi=0.) const
	returns position after rotating angle dPhi in phi direction.
double *	x (double dPhi, double p[3]) const
HepPoint3D	x (double dPhi, HepSymMatrix &Ex) const
	returns position and convariance matrix(Ex) after rotation.
Hep3Vector	direction (double dPhi=0.) const
	returns direction vector after rotating angle dPhi in phi direction.
Hep3Vector	momentum (double dPhi=0.) const
	returns momentum vector after rotating angle dPhi in phi direction.
Hep3Vector	momentum (double dPhi, HepSymMatrix &Em) const
	returns momentum vector after rotating angle dPhi in phi direction.
HepLorentzVector	momentum (double dPhi, double mass) const
	returns 4momentum vector after rotating angle dPhi in phi direction.
HepLorentzVector	momentum (double dPhi, double mass, HepSymMatrix &Em) const
	returns 4momentum vector after rotating angle dPhi in phi direction.
HepLorentzVector	momentum (double dPhi, double mass, HepPoint3D &x, HepSymMatrix &Emx) const
	returns 4momentum vector after rotating angle dPhi in phi direction.
double	a0 (void) const
	returns an element of parameters.
double	dr (void) const
double	z (void) const
double	phi (void) const
double	cotth (void) const
double	ptinv (void) const
double	kappa (void) const
double	sinPhi (void) const
double	cosPhi (void) const
const HepVector &	a (void) const
	returns helix parameters.
const HepSymMatrix &	Ea (void) const
	returns error matrix.
const HepVector &	a (const HepVector &newA)
	sets helix parameters.
const HepSymMatrix &	Ea (const HepSymMatrix &newdA)
	sets helix paramters and error matrix.
const HepPoint3D &	pivot (const HepPoint3D &newPivot)
	sets pivot position.
void	set (const HepPoint3D &pivot, const HepVector &a, const HepSymMatrix &Ea)
	sets helix pivot position, parameters, and error matrix.
void	ignoreErrorMatrix (void)
	unsets error matrix. Error calculations will be ignored after this function call until an error matrix be set again. 0 matrix will be return as a return value for error matrix when you call functions which returns an error matrix.
double	bFieldZ (double)
	sets/returns z componet of the magnetic field.
double	bFieldZ (void) const
Helix &	operator= (const Helix &)
	Copy operator.
HepMatrix	delApDelA (const HepVector &ap, const HepPoint3D &newPivot) const
HepMatrix	delXDelA (double phi) const
HepMatrix	delMDelA (double phi) const
HepMatrix	del4MDelA (double phi, double mass) const
HepMatrix	del4MXDelA (double phi, double mass) const
Protected Methods
virtual void	updateCache (void)

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Detailed Description

Helix class.

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The documentation for this class was generated from the following files:

• Helix.h
• Helix.cxx

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