VertexDistance Class Reference

#include <VertexDistance.h>

Inheritance diagram for VertexDistance:

Public Member Functions
virtual VertexDistance *	clone () const =0
virtual float	compatibility (const reco::Vertex &, const reco::Vertex &) const
virtual float	compatibility (const VertexState &, const VertexState &) const
virtual float	compatibility (const reco::Vertex &, const VertexState &) const
virtual float	compatibility (const VertexState &, const reco::Vertex &) const
Measurement1D	distance (const reco::Vertex &, const reco::Vertex &) const
Measurement1D	distance (const VertexState &, const VertexState &) const
Measurement1D	distance (const reco::Vertex &, const VertexState &) const
Measurement1D	distance (const VertexState &, const reco::Vertex &) const
virtual Measurement1D	signedDistance (const reco::Vertex &primVtx, const reco::Vertex &secVtx, const GlobalVector &momentum) const =0
virtual	~VertexDistance ()

Protected Member Functions
virtual float	compatibility (const GlobalPoint &vtx1Position, const GlobalError &vtx1PositionError, const GlobalPoint &vtx2Position, const GlobalError &vtx2PositionError) const =0
virtual Measurement1D	distance (const GlobalPoint &vtx1Position, const GlobalError &vtx1PositionError, const GlobalPoint &vtx2Position, const GlobalError &vtx2PositionError) const =0

Detailed Description

Abstact class which defines a distance and compatibility between vertices.

Definition at line 16 of file VertexDistance.h.

Constructor & Destructor Documentation

virtual VertexDistance::~VertexDistance ( )

inlinevirtual

Definition at line 19 of file VertexDistance.h.

{}

Member Function Documentation

virtual VertexDistance* VertexDistance::clone ( ) const

pure virtual

Implemented in VertexDistance3D, and VertexDistanceXY.

float VertexDistance::compatibility ( const reco::Vertex &  vtx1, const reco::Vertex &  vtx2  ) const

virtual

Definition at line 68 of file VertexDistance.cc.

References reco::Vertex::covariance(), and reco::Vertex::position().

{
  return compatibility(GlobalPoint(Basic3DVector<float> (vtx1.position())), 
               GlobalError(vtx1.covariance()),
               GlobalPoint(Basic3DVector<float> (vtx2.position())), 
               GlobalError(vtx2.covariance()));
}

float VertexDistance::compatibility ( const VertexState &  vtx1, const VertexState &  vtx2  ) const

virtual

Definition at line 44 of file VertexDistance.cc.

References VertexState::error(), and VertexState::position().

{
  return compatibility(vtx1.position(), vtx1.error(),
               vtx2.position(), vtx2.error());
}

float VertexDistance::compatibility ( const reco::Vertex &  vtx1, const VertexState &  vtx2  ) const

virtual

Definition at line 51 of file VertexDistance.cc.

References reco::Vertex::covariance(), VertexState::error(), VertexState::position(), and reco::Vertex::position().

{
  return compatibility(GlobalPoint(Basic3DVector<float> (vtx1.position())), 
               GlobalError(vtx1.covariance()),
               vtx2.position(), vtx2.error());
}

float VertexDistance::compatibility ( const VertexState &  vtx1, const reco::Vertex &  vtx2  ) const

virtual

Definition at line 59 of file VertexDistance.cc.

References reco::Vertex::covariance(), VertexState::error(), VertexState::position(), and reco::Vertex::position().

{
  return compatibility(vtx1.position(), vtx1.error(),
          GlobalPoint(Basic3DVector<float> (vtx2.position())), 
          GlobalError(vtx2.covariance()));
}

virtual float VertexDistance::compatibility ( const GlobalPoint &  vtx1Position, const GlobalError &  vtx1PositionError, const GlobalPoint &  vtx2Position, const GlobalError &  vtx2PositionError  ) const

protectedpure virtual

Implemented in VertexDistance3D, and VertexDistanceXY.

Measurement1D VertexDistance::distance	(	const reco::Vertex &	vtx1,
		const reco::Vertex &	vtx2
	)		const

Definition at line 35 of file VertexDistance.cc.

References reco::Vertex::covariance(), and reco::Vertex::position().

Referenced by IPTools::absoluteImpactParameter(), VertexCompatibleWithBeam::distanceToBeam(), and VertexCompatibleWithBeam::operator()().

{
  return distance(GlobalPoint(Basic3DVector<float> (vtx1.position())), 
          GlobalError(vtx1.covariance()),
          GlobalPoint(Basic3DVector<float> (vtx2.position())), 
          GlobalError(vtx2.covariance()));
}

Measurement1D VertexDistance::distance	(	const VertexState &	vtx1,
		const VertexState &	vtx2
	)		const

Definition at line 9 of file VertexDistance.cc.

References VertexState::error(), and VertexState::position().

{
  return distance(vtx1.position(), vtx1.error(),
          vtx2.position(), vtx2.error());
}

Measurement1D VertexDistance::distance	(	const reco::Vertex &	vtx1,
		const VertexState &	vtx2
	)		const

Definition at line 16 of file VertexDistance.cc.

References reco::Vertex::covariance(), VertexState::error(), VertexState::position(), and reco::Vertex::position().

{
  return distance(GlobalPoint(Basic3DVector<float> (vtx1.position())), 
          GlobalError(vtx1.covariance()),
          vtx2.position(), vtx2.error());
}

Measurement1D VertexDistance::distance	(	const VertexState &	vtx1,
		const reco::Vertex &	vtx2
	)		const

Definition at line 25 of file VertexDistance.cc.

References reco::Vertex::covariance(), VertexState::error(), VertexState::position(), and reco::Vertex::position().

{
  return distance(vtx1.position(), vtx1.error(),
          GlobalPoint(Basic3DVector<float> (vtx2.position())), 
          GlobalError(vtx2.covariance()));
}

virtual Measurement1D VertexDistance::distance ( const GlobalPoint &  vtx1Position, const GlobalError &  vtx1PositionError, const GlobalPoint &  vtx2Position, const GlobalError &  vtx2PositionError  ) const

protectedpure virtual

Implemented in VertexDistance3D, and VertexDistanceXY.

virtual Measurement1D VertexDistance::signedDistance ( const reco::Vertex &  primVtx, const reco::Vertex &  secVtx, const GlobalVector &  momentum  ) const

pure virtual

The signed distance is computed using a vector from the primary to the secondary vertex and a given reference vector. for the 2D case: The sign is determined by the scalar product of the x,y component of the vector connecting the vertices and the reference vector: if the scalar product is greater than zero, the sign is +1, else -1

for the 3D case: Follows same approach, using all three components of the two vectors

Implemented in VertexDistance3D, and VertexDistanceXY.