Abstract trajectory interface describing a geometrical path in 3D space. More...

#include <Trajectory.h>

Inheritance diagram for Trajectory:

Public Member Functions
virtual LCVector3D	getPosition (double s, LCErrorMatrix *errors=0) const =0
	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 =0
	Direction at path length s, i.e. More...

virtual LCErrorMatrix	getCovarianceMatrix (double s) const =0
	Full covariance Matrix of x,y,z,px,py,pz. More...

virtual double	getPathAt (const LCVector3D position) const =0
	Pathlength at point on trajectory closest to given position. More...

virtual double	getIntersectionWithPlane (LCPlane3D p, bool &pointExists) const =0
	Pathlength at closest intersection point with plane - undefined if pointExists==false.

virtual double	getIntersectionWithCylinder (const LCCylinder &cylinder, bool &pointExists) const =0
	Pathlength at closest intersection point with cylinder - undefined if pointExists==false. More...

Detailed Description

Abstract trajectory interface describing a geometrical path in 3D space.

Member Function Documentation

virtual LCErrorMatrix Trajectory::getCovarianceMatrix ( double s ) const

pure virtual

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

Parameters

s	path length

Implemented in SimpleLine, and SimpleHelix.

virtual LCVector3D Trajectory::getDirection	(	double	s,
		LCErrorMatrix *	errors = `0`
	)		const

pure virtual

Direction at path length s, i.e.

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

Parameters

s	path length
errors	3x3 matrix, return argument - not computed if NULL

Implemented in SimpleLine, and SimpleHelix.

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

pure virtual

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

Parameters

cylinder cylinder object to intersect with

Implemented in SimpleLine, and SimpleHelix.

virtual double Trajectory::getPathAt ( const LCVector3D position ) const

pure 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() ;

Implemented in SimpleLine, and SimpleHelix.

virtual LCVector3D Trajectory::getPosition	(	double	s,
		LCErrorMatrix *	errors = `0`
	)		const

pure virtual

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

Parameters

s	path length
errors	3x3 matrix, return argument - not computed if NULL

Implemented in SimpleLine, and SimpleHelix.

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