#include <ClosestApproachOnHelices.h>

Inheritance diagram for ClosestApproachOnHelices:

Public Member Functions
virtual bool	calculate (const TrajectoryStateOnSurface &sta, const TrajectoryStateOnSurface &stb)=0

virtual bool	calculate (const FreeTrajectoryState &sta, const FreeTrajectoryState &stb)=0

virtual ClosestApproachOnHelices *	clone () const =0

	ClosestApproachOnHelices ()

virtual GlobalPoint	crossingPoint () const =0

virtual float	distance () const =0

virtual std::pair< GlobalPoint, GlobalPoint >	points () const =0

virtual bool	status () const =0

virtual	~ClosestApproachOnHelices ()

Detailed Description

Abstract interface for classes which compute the points of closest approach of 2 helices.
For a pair of states, the calculate methods have to be called before any of the other methods. This will do all calculations needed to get the result. It returns a status which says whether the calculation was successful. This should be checked before getting the result. If the status is false and the results querried, an exception will be thrown.

Definition at line 21 of file ClosestApproachOnHelices.h.

Constructor & Destructor Documentation

ClosestApproachOnHelices::ClosestApproachOnHelices ( )

inline

Definition at line 25 of file ClosestApproachOnHelices.h.

25 {}

virtual ClosestApproachOnHelices::~ClosestApproachOnHelices ( )

inlinevirtual

Definition at line 27 of file ClosestApproachOnHelices.h.

References calculate(), clone(), crossingPoint(), distance(), points(), and status().

27 {}

Member Function Documentation

virtual bool ClosestApproachOnHelices::calculate	(	const TrajectoryStateOnSurface &	sta,
		const TrajectoryStateOnSurface &	stb
	)

pure virtual

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

Referenced by ~ClosestApproachOnHelices().

virtual bool ClosestApproachOnHelices::calculate	(	const FreeTrajectoryState &	sta,
		const FreeTrajectoryState &	stb
	)

pure virtual

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

virtual ClosestApproachOnHelices* ClosestApproachOnHelices::clone ( ) const

pure virtual

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

Referenced by ~ClosestApproachOnHelices().

virtual GlobalPoint ClosestApproachOnHelices::crossingPoint ( ) const

pure virtual

Crossing point of the 2 helices, computed as an average of the points of closest approach. The average can be weighted or not, depending on the implementation.

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

Referenced by ~ClosestApproachOnHelices().

virtual float ClosestApproachOnHelices::distance ( ) const

pure virtual

Distance between the points of closest approach

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

Referenced by ~ClosestApproachOnHelices().

virtual std::pair<GlobalPoint, GlobalPoint> ClosestApproachOnHelices::points ( ) const

pure virtual

Points of closest approach on the 2 helices

Implemented in ClosestApproachInRPhi, TwoTrackMinimumDistance, and TangentApproachInRPhi.

Referenced by ~ClosestApproachOnHelices().