LCLine3D Class Reference

Definition of a LCLine3D describing a geometrical line in 3D space. More...

#include <LCLine3D.h>

Public Member Functions
	LCLine3D ()
	Standard constructor: Initializes a line along the x-axis.
	LCLine3D (const LCVector3D &point, const LCVector3D &direction)
	Constructor from a point and a direction. More...
	LCLine3D (const LCVector3D &point, const LCVector3D &direction, const LCVector3D &reference)
	Constructor from a point and a direction. More...
	LCLine3D (double d0, double phi0, double z0, double tanLambda)
	Constructor using the canonical parameterization. More...
	LCLine3D (double d0, double phi0, double z0, double tanLambda, const LCVector3D &reference)
	Constructor using the canonical parameterization. More...
	LCLine3D (const LCLine3D &line)
	Copy constructor. More...
	~LCLine3D ()
	Destructor. More...
bool	set (const LCVector3D &point, const LCVector3D &direction, const LCVector3D &reference)
	set the Parameters for a line using a point and a direction. More...
bool	set (double d0, double phi0, double z0, double tanLambda, const LCVector3D &reference)
	Set the Parameters of a line using the canonical parameterization. More...
LCLine3D &	operator= (const LCLine3D &rhs)
	Assignment. More...
LCVector3D	position (const double s=0) const
	Position is the point of the line after a distance s. More...
LCVector3D	direction () const
	Direction of the line.
double	distance (const LCVector3D &point) const
	Distance of a point to the line. More...
double	projectPoint (const LCVector3D &point) const
	Projection of a point on to the line. More...
bool	operator== (const LCLine3D &rhs) const
	Test for equality. More...
bool	operator!= (const LCLine3D &rhs) const
	Test for inequality. More...
double	intersectionWithPlane (const LCPlane3D plane, bool &pointExists) const
	Pathlength at closest intersection point with plane - undefined if pointExists==false.

Protected Attributes
LCVector3D	_point
LCVector3D	_direction
LCVector3D	_reference

Detailed Description

Definition of a LCLine3D describing a geometrical line in 3D space.

Author

T.Kraemer, DESY

Version

Id:

LCLine3D.h,v 1.8 2006-11-03 16:43:13 tkraemer Exp

Constructor & Destructor Documentation

LCLine3D::LCLine3D	(	const LCVector3D &	point,
		const LCVector3D &	direction
	)

Constructor from a point and a direction.

Parameters

point	Point is a point of the line
direction	Direction is the directional vector of the line.

References set().

LCLine3D::LCLine3D	(	const LCVector3D &	point,
		const LCVector3D &	direction,
		const LCVector3D &	reference
	)

Constructor from a point and a direction.

Parameters

point	Point is a point of the line
direction	Direction is the directional vector of the line.
reference	reference point of the line.

References set().

LCLine3D::LCLine3D	(	double	d0,
		double	phi0,
		double	z0,
		double	tanLambda
	)

Constructor using the canonical parameterization.

Parameters

d0	d0 is the point of closest approach in the xy plane.
phi0	phi0 is the angle in the xy plane.
z0	z0 is the z coordinate of the point of closest approach.
tanLambda	tanLambda is the angle of with respect to the xy plane.

References set().

LCLine3D::LCLine3D	(	double	d0,
		double	phi0,
		double	z0,
		double	tanLambda,
		const LCVector3D &	reference
	)

Constructor using the canonical parameterization.

Parameters

d0	d0 is the point of closest approach in the xy plane.
phi0	phi0 is the angle in the xy plane.
z0	z0 is the z coordinate of the point of closest approach.
tanLambda	tanLambda is the angle of with respect to the xy plane.
reference	reference point of the line.

References set().

LCLine3D::LCLine3D

(

const LCLine3D &

line

)

Copy constructor.

Parameters

line	line is an other LCLine3D.

LCLine3D::~LCLine3D ( )

inline

Destructor.

Member Function Documentation

double LCLine3D::distance

(

const LCVector3D &

point

)

const

Distance of a point to the line.

Parameters

point

point is a point in space

References position(), and projectPoint().

Referenced by SimpleHelix::getIntersectionWithCylinder(), LCCylinder::isInside(), and LCCylinder::projectPoint().

bool LCLine3D::operator!=

(

const LCLine3D &

rhs

)

const

Test for inequality.

LCLine3D & LCLine3D::operator=

(

const LCLine3D &

rhs

)

Assignment.

bool LCLine3D::operator==

(

const LCLine3D &

rhs

)

const

Test for equality.

LCVector3D LCLine3D::position

(

const double

s = 0

)

const

Position is the point of the line after a distance s.

Is is given with respect to the point of closes approach to the origen of the coordinate system.

Parameters

s	s is the path length along the line

Referenced by distance(), SimpleHelix::getIntersectionWithCylinder(), SimpleLine::getIntersectionWithCylinder(), SimpleHelix::getIntersectionWithPlane(), SimpleLine::getPosition(), intersectionWithPlane(), and LCCylinder::projectPoint().

double LCLine3D::projectPoint

(

const LCVector3D &

point

)

const

Projection of a point on to the line.

Parameters

point

point is a point in space.

Referenced by distance(), SimpleHelix::getIntersectionWithCylinder(), SimpleLine::getIntersectionWithCylinder(), SimpleLine::getPathAt(), LCCylinder::isInside(), and LCCylinder::projectPoint().

bool LCLine3D::set	(	const LCVector3D &	point,
		const LCVector3D &	direction,
		const LCVector3D &	reference
	)

set the Parameters for a line using a point and a direction.

Parameters

point	Point is a point of the line
direction	Direction is the directional vector of the line.
reference	reference point of the line.

Referenced by LCLine3D().

bool LCLine3D::set	(	double	d0,
		double	phi0,
		double	z0,
		double	tanLambda,
		const LCVector3D &	reference
	)

Set the Parameters of a line using the canonical parameterization.

Parameters

d0	d0 is the point of closest approach in the xy plane.
phi0	phi0 is the angle in the xy plane.
z0	z0 is the z coordinate of the point of closest approach.
tanLambda	tanLambda is the angle of with respect to the xy plane.
reference	reference point of the line.

---

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

• LCLine3D.h
• LCLine3D.cc