TangentHelix Class Reference

#include <TangentHelix.h>

Public Member Functions
int	charge (float magz)
TangentCircle	circle () const
double	curvatureError ()
GlobalVector	directionAtVertex ()
GlobalPoint	innerPoint () const
GlobalPoint	outerPoint () const
double	rho () const
	TangentHelix ()
	TangentHelix (const GlobalPoint &outerPoint, const GlobalPoint &innerPoint, const GlobalPoint &vertexPoint)
	Calculate Helix from 3 points. More...
	TangentHelix (const GlobalVector &direction, const GlobalPoint &innerPoint, const GlobalPoint &outerPoint)
	TangentHelix (const TangentHelix &primCircle, const GlobalPoint &outerPoint, const GlobalPoint &innerPoint)
	Calculate the parameters of the helix which pass by 2 points (innerPoint and outerPoint) and which is tangent to primHelix. More...
double	vertexError ()
GlobalPoint	vertexPoint () const

Private Attributes
TangentCircle	theCircle
GlobalVector	theDirectionAtVertex
GlobalPoint	theInnerPoint
GlobalPoint	theOuterPoint
GlobalPoint	theVertexPoint

Detailed Description

Definition at line 6 of file TangentHelix.h.

Constructor & Destructor Documentation

TangentHelix() [1/4]

TangentHelix::TangentHelix ( )

inline

Definition at line 8 of file TangentHelix.h.

{}

TangentHelix() [2/4]

TangentHelix::TangentHelix ( const GlobalVector &  direction, const GlobalPoint &  innerPoint, const GlobalPoint &  outerPoint  )

inline

Calculate the helix from 2 points on the circle (the vertex=innerPoint and the outerPoint) and the tangent direction at the inner point

Definition at line 12 of file TangentHelix.h.

      : theInnerPoint(innerPoint),
        theOuterPoint(outerPoint),
        theVertexPoint(innerPoint),
        theCircle(direction, innerPoint, outerPoint),
        theDirectionAtVertex(direction) {}

TangentHelix() [3/4]

TangentHelix::TangentHelix ( const GlobalPoint &  outerPoint, const GlobalPoint &  innerPoint, const GlobalPoint &  vertexPoint  )

inline

Calculate Helix from 3 points.

Definition at line 20 of file TangentHelix.h.

      : theInnerPoint(innerPoint),
        theOuterPoint(outerPoint),
        theVertexPoint(vertexPoint),
        theCircle(outerPoint, innerPoint, vertexPoint) {
    theDirectionAtVertex = GlobalVector(1000, 1000, 1000);
  }

References theDirectionAtVertex.

TangentHelix() [4/4]

TangentHelix::TangentHelix	(	const TangentHelix &	primCircle,
		const GlobalPoint &	outerPoint,
		const GlobalPoint &	innerPoint
	)

Calculate the parameters of the helix which pass by 2 points (innerPoint and outerPoint) and which is tangent to primHelix.

Definition at line 3 of file TangentHelix.cc.

    : theInnerPoint(innerPoint), theOuterPoint(outerPoint), theCircle(primCircle.circle(), outerPoint, innerPoint) {
  // Calculation of vertex.z :
  GlobalPoint inner_T(innerPoint.x(), innerPoint.y(), 0.0);
  GlobalPoint outer_T(outerPoint.x(), outerPoint.y(), 0.0);
  GlobalPoint vtx_T(theCircle.vertexPoint().x(), theCircle.vertexPoint().y(), 0.0);
 
  double d1 = (inner_T - vtx_T).mag();
  double d = (inner_T - outer_T).mag();
 
  theVertexPoint = GlobalPoint(vtx_T.x(), vtx_T.y(), innerPoint.z() - (outerPoint.z() - innerPoint.z()) * d1 / d);
  theDirectionAtVertex = GlobalVector(1000, 1000, 1000);
}

References ztail::d, d1, innerPoint(), mag(), outerPoint(), theCircle, theDirectionAtVertex, theVertexPoint, TangentCircle::vertexPoint(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Member Function Documentation

charge()

int TangentHelix::charge ( float  magz )

inline

Definition at line 41 of file TangentHelix.h.

{ return theCircle.charge(magz); }

References TangentCircle::charge(), and theCircle.

Referenced by SeedFromNuclearInteraction::stateWithError().

circle()

TangentCircle TangentHelix::circle ( ) const

inline

Definition at line 37 of file TangentHelix.h.

{ return theCircle; }

References theCircle.

curvatureError()

double TangentHelix::curvatureError ( )

inline

Definition at line 45 of file TangentHelix.h.

{ return theCircle.curvatureError(); }

References TangentCircle::curvatureError(), and theCircle.

directionAtVertex()

GlobalVector TangentHelix::directionAtVertex

(

)

Definition at line 17 of file TangentHelix.cc.

                                             {
  if (theDirectionAtVertex.z() > 999) {
    GlobalPoint inner_T(theInnerPoint.x(), theInnerPoint.y(), 0.0);
    GlobalPoint outer_T(theOuterPoint.x(), theOuterPoint.y(), 0.0);
    double p_z = (theOuterPoint.z() - theInnerPoint.z()) / (outer_T - inner_T).mag();
 
    GlobalVector dir_T = theCircle.directionAtVertex();
    GlobalVector dir(dir_T.x(), dir_T.y(), p_z);
 
    dir /= dir.mag();
    theDirectionAtVertex = dir;
  }
 
  return theDirectionAtVertex;
}

References DeadROC_duringRun::dir, TangentCircle::directionAtVertex(), theCircle, theDirectionAtVertex, theInnerPoint, theOuterPoint, PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by SeedFromNuclearInteraction::stateWithError().

innerPoint()

GlobalPoint TangentHelix::innerPoint ( ) const

inline

Definition at line 33 of file TangentHelix.h.

{ return theInnerPoint; }

References theInnerPoint.

Referenced by TangentHelix().

outerPoint()

GlobalPoint TangentHelix::outerPoint ( ) const

inline

Definition at line 31 of file TangentHelix.h.

{ return theOuterPoint; }

References theOuterPoint.

Referenced by TangentHelix().

rho()

double TangentHelix::rho ( ) const

inline

Definition at line 43 of file TangentHelix.h.

{ return theCircle.rho(); }

References TangentCircle::rho(), and theCircle.

Referenced by Lepton.Lepton::absIsoFromEA(), Muon.Muon::absIsoWithFSR(), and SeedFromNuclearInteraction::stateWithError().

vertexError()

double TangentHelix::vertexError ( )

inline

Definition at line 47 of file TangentHelix.h.

{ return theCircle.vertexError(); }

References theCircle, and TangentCircle::vertexError().

Referenced by SeedFromNuclearInteraction::stateWithError().

vertexPoint()

GlobalPoint TangentHelix::vertexPoint ( ) const

inline

Definition at line 35 of file TangentHelix.h.

{ return theVertexPoint; }

References theVertexPoint.

Referenced by SeedFromNuclearInteraction::stateWithError().

Member Data Documentation

theCircle

TangentCircle TangentHelix::theCircle

private

Definition at line 54 of file TangentHelix.h.

Referenced by charge(), circle(), curvatureError(), directionAtVertex(), rho(), TangentHelix(), and vertexError().

theDirectionAtVertex

GlobalVector TangentHelix::theDirectionAtVertex

private

Definition at line 56 of file TangentHelix.h.

Referenced by directionAtVertex(), and TangentHelix().

theInnerPoint

GlobalPoint TangentHelix::theInnerPoint

private

Definition at line 50 of file TangentHelix.h.

Referenced by directionAtVertex(), and innerPoint().

theOuterPoint

GlobalPoint TangentHelix::theOuterPoint

private

Definition at line 51 of file TangentHelix.h.

Referenced by directionAtVertex(), and outerPoint().

theVertexPoint

GlobalPoint TangentHelix::theVertexPoint

private

Definition at line 52 of file TangentHelix.h.

Referenced by TangentHelix(), and vertexPoint().