Line Class Reference

STAR includes. More...

#include <Line.hh>

Public Member Functions
	Line (const StThreeVectorD &o, const StThreeVectorD &d)
StThreeVectorD	origin () const
	Origin of the line.
StThreeVectorD	direction () const
	Direction vector of the line (normalized to the unit vector)
StThreeVectorD	at (double pathlength) const
	Point at a given path length along the line. More...
StThreeVectorD	perigee (const StThreeVectorD &point) const
	Perigee, i.e. Closest point on the line to a given point. More...
StThreeVectorD	dca (const Line &line) const
	DCA = Distance of Closest Approach to a given line. More...
double	pathlength (const StThreeVectorD &point) const
	Pathlength of a given point from the origin of the line. More...
pair< double, double >	pathlengths (const Line &line) const
	Pathlengths of the points of closest approach between the lines. More...
void	setOrigin (const StThreeVectorD &o)
	Set the origin of the line to a given point. More...
void	setDirection (const StThreeVectorD &d)
	Set the direction of the line to a given vector. The direction is normalized to the unit vector. More...
	Line (Vector &u0, Vector &u1)

Public Attributes
Vector	v0
Vector	v1

Detailed Description

STAR includes.

3D lines

Definition at line 23 of file Line.hh.

Member Function Documentation

StThreeVectorD Line::at

(

double

pathlength

)

const

Point at a given path length along the line.

Parameters

Pathlength

Returns

Point at pathlength

Definition at line 16 of file Line.cc.

Referenced by dca().

StThreeVectorD Line::dca

(

const Line &

line

)

const

DCA = Distance of Closest Approach to a given line.

Parameters

Any

line

Returns

3D-vector of the closest distance between the two lines

Definition at line 31 of file Line.cc.

References at(), direction(), and origin().

double Line::pathlength

(

const StThreeVectorD &

point

)

const

Pathlength of a given point from the origin of the line.

Parameters

Any

point

Returns

Pathlength from the origin

Definition at line 21 of file Line.cc.

Referenced by pathlengths().

pair< double, double > Line::pathlengths

(

const Line &

line

)

const

Pathlengths of the points of closest approach between the lines.

Parameters

Any

line

Returns

Pair of double. The first value is the pathlength at this line of the point of closest approach to that line. The second value is the pathlength on that lineof the point of closest to this line.

Definition at line 41 of file Line.cc.

References direction(), origin(), and pathlength().

StThreeVectorD Line::perigee

(

const StThreeVectorD &

point

)

const

Perigee, i.e. Closest point on the line to a given point.

Parameters

Any

point

Returns

Closest point on the line

Definition at line 26 of file Line.cc.

Referenced by Track::fit().

void Line::setDirection ( const StThreeVectorD &  d )

inline

Set the direction of the line to a given vector. The direction is normalized to the unit vector.

Parameters

Any

vector

Definition at line 97 of file Line.hh.

void Line::setOrigin ( const StThreeVectorD &  o )

inline

Set the origin of the line to a given point.

Parameters

Any

point

Definition at line 96 of file Line.hh.

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

• StBeamBackMaker/Line.hh
• StFgtPool/StFgtAlignmentMaker/StFgtAlignmentMaker.cxx
• StBeamBackMaker/Line.cc