class AliFmPhysicalHelix: public AliFmHelix


AliFmHelix: a helper helix class
Includes all the operations and specifications of the helix. Can be
used to determine path lengths, distance of closest approach etc.

Function Members (Methods)

public:

	AliFmPhysicalHelix()
	AliFmPhysicalHelix(const AliFmPhysicalHelix&)
	AliFmPhysicalHelix(const AliFmThreeVector<double>& v1, const AliFmThreeVector<double>& v2, double x, double y)
	AliFmPhysicalHelix(double curvature, double dipAngle, double phase, const AliFmThreeVector<double>& origin, int h = -1)
virtual	~AliFmPhysicalHelix()
AliFmThreeVector<double>	AliFmHelix::At(double s) const
int	AliFmHelix::Bad(double WorldSize = 1.e+5) const
int	Charge(double x) const
double	AliFmHelix::Curvature() const
double	CurvatureSignedDistance(const AliFmThreeVector<double>& v)
double	CurvatureSignedDistance(double x, double y)
double	AliFmHelix::DipAngle() const
double	AliFmHelix::Distance(const AliFmThreeVector<double>& p, bool scanPeriods = true) const
double	GeometricSignedDistance(const AliFmThreeVector<double>& v)
double	GeometricSignedDistance(double x, double y)
int	AliFmHelix::H() const
AliFmThreeVector<double>	Momentum(double x) const
AliFmThreeVector<double>	MomentumAt(double x, double y) const
virtual void	AliFmHelix::MoveOrigin(double s)
AliFmPhysicalHelix&	operator=(const AliFmPhysicalHelix&)
const AliFmThreeVector<double>&	AliFmHelix::Origin() const
pair<double,double>	AliFmHelix::PathLength(double r) const
double	AliFmHelix::PathLength(const AliFmThreeVector<double>& p, bool scanPeriods = true) const
double	AliFmHelix::PathLength(const AliFmThreeVector<double>& r, const AliFmThreeVector<double>& n) const
double	AliFmHelix::PathLength(double x, double y) const
pair<double,double>	AliFmHelix::PathLength(double r, double x, double y, bool scanPeriods = true)
pair<double,double>	AliFmHelix::PathLengths(const AliFmHelix& h, bool scanPeriods = true) const
double	AliFmHelix::Period() const
double	AliFmHelix::Phase() const
void	AliFmHelix::SetParameters(double c, double dip, double phase, const AliFmThreeVector<double>& o, int h)
bool	AliFmHelix::Valid(double world = 1.e+5) const
double	AliFmHelix::X(double s) const
double	AliFmHelix::XCenter() const
double	AliFmHelix::Y(double s) const
double	AliFmHelix::YCenter() const
double	AliFmHelix::Z(double s) const

protected:

double	AliFmHelix::FudgePathLength(const AliFmThreeVector<double>& v) const
void	AliFmHelix::SetCurvature(double d)
void	AliFmHelix::SetDipAngle(double d)
void	AliFmHelix::SetPhase(double d)

Data Members

public:

static const double	AliFmHelix::fgkNoSolution	coinstant indicating lack of solution

protected:

double	AliFmHelix::fCosDipAngle	cosine of the dip angle
double	AliFmHelix::fCosPhase	cosine of the phase
double	AliFmHelix::fCurvature	curvature
double	AliFmHelix::fDipAngle	Helix dip angle
int	AliFmHelix::fH	-sign(q*B);
AliFmThreeVector<double>	AliFmHelix::fOrigin	Helix origin
double	AliFmHelix::fPhase	phase
double	AliFmHelix::fSinDipAngle	sine of the dip angle
double	AliFmHelix::fSinPhase	sine of the phase
bool	AliFmHelix::fSingularity	true for straight line case (B=0)

Class Charts

Inheritance Chart:

AliFmHelix

←

AliFmPhysicalHelix

Function documentation

AliFmPhysicalHelix()

{}

~AliFmPhysicalHelix()

{ /* nop */ }

AliFmPhysicalHelix(const AliFmThreeVector<double>& v1, const AliFmThreeVector<double>& v2, double x, double y)

 Constructor from given parameters

AliFmPhysicalHelix(double curvature, double dipAngle, double phase, const AliFmThreeVector<double>& origin, int h = -1)

{ /* nop */}

AliFmThreeVector<double> Momentum(double x) const

 momentum for given magnetic field

AliFmThreeVector<double> MomentumAt(double x, double y) const

 Obtain phase-shifted momentum from phase-shift of origin

int Charge(double x) const

 charge

double GeometricSignedDistance(double x, double y)

 Geometric signed distance

double CurvatureSignedDistance(double x, double y)

 Protect against fH = 0 or zero field

double GeometricSignedDistance(const AliFmThreeVector<double>& v)

 Geometric distance

double CurvatureSignedDistance(const AliFmThreeVector<double>& v)

 Distance with the sign dependent on curvature sigm

AliFmPhysicalHelix(const AliFmThreeVector<double>& v1, const AliFmThreeVector<double>& v2, double x, double y)

 Requires: momentum, origin, signed Magnetic Field
           and Charge of particle (+/- 1)