SimpleLine Class Reference

Simple line trajectory. More...

#include <SimpleLine.h>

Inheritance diagram for SimpleLine:

Public Member Functions
	SimpleLine (LCVector3D ref, LCVector3D direction)
	Construct Line from reference point and direction.
virtual LCVector3D	getPosition (double s, LCErrorMatrix *errors=0) const
	Position at path length s - s==0 corresponds to P.C.A to the origin. More...
virtual LCVector3D	getDirection (double s, LCErrorMatrix *errors=0) const
	Direction at path length s, i.e. More...
virtual LCErrorMatrix	getCovarianceMatrix (double s) const
	Full covariance Matrix of x,y,z,px,py,pz. More...
virtual double	getPathAt (const LCVector3D position) const
	Pathlength at point on trajectory closest to given position. More...
virtual double	getIntersectionWithPlane (LCPlane3D p, bool &pointExists) const
	Pathlength at closest intersection point with plane - undefined if pointExists==false.
virtual double	getIntersectionWithCylinder (const LCCylinder &cylinder, bool &pointExists) const
	Pathlength at closest intersection point with cylinder - undefined if pointExists==false. More...

Protected Attributes
LCLine3D	_line

Detailed Description

Simple line trajectory.

Author

F.Gaede, T.Kraemer, DESY

Version

Id:

SimpleLine.h,v 1.4 2006-10-25 09:21:37 tkraemer Exp

Member Function Documentation

LCErrorMatrix SimpleLine::getCovarianceMatrix ( double  s ) const

virtual

Full covariance Matrix of x,y,z,px,py,pz.

Parameters

s	path length

Implements Trajectory.

LCVector3D SimpleLine::getDirection ( double  s, LCErrorMatrix *  errors = 0  ) const

virtual

Direction at path length s, i.e.

(dx/ds,dy/ds,dz/ds)

Parameters

s	path length
errors	return argument - not computed if NULL

Implements Trajectory.

References LCLine3D::direction().

double SimpleLine::getIntersectionWithCylinder ( const LCCylinder &  cylinder, bool &  pointExists  ) const

virtual

Pathlength at closest intersection point with cylinder - undefined if pointExists==false.

Parameters

cylinder

cylinder object to intersect with

Implements Trajectory.

References LCCylinder::distance(), LCCylinder::endPoint(), LCCylinder::length(), LCLine3D::position(), LCLine3D::projectPoint(), LCCylinder::radius(), and LCCylinder::startPoint().

double SimpleLine::getPathAt ( const LCVector3D  position ) const

virtual

Pathlength at point on trajectory closest to given position.

In order to get the distance use for example:
LCVector3D pt = t.getPosition( t.getPathAtClosestPoint( p ) ) ;
double d = LCVector3D( pt - p ).mag() ;

Implements Trajectory.

References LCLine3D::projectPoint().

LCVector3D SimpleLine::getPosition ( double  s, LCErrorMatrix *  errors = 0  ) const

virtual

Position at path length s - s==0 corresponds to P.C.A to the origin.

Parameters

s	path length
errors	return argument - not computed if NULL

Implements Trajectory.

References LCLine3D::position().

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

• SimpleLine.h
• SimpleLine.cc