BesPointErr Class Reference

#include <BesPointErr.h>

Inheritance diagram for BesPointErr:

Public Types
enum	PolarCoordinateIndex { Rho = 0 , Theta = 1 , Phi = 2 , NUM_PCOORDINATES = 3 }
enum	CylindricalCoordinateIndex { C_Rho = 0 , C_Zeta = 1 , C_Phi = 2 , NUM_CCOORDINATES = 3 }

Public Member Functions
	BesPointErr ()
	BesPointErr (const HepPoint3D &p)
	BesPointErr (const HepPoint3D &p, const BesError &covMat)
	BesPointErr (const BesPointErr &v)
double	determineChisq (const HepPoint3D &diffPoint) const
BesError	covRTPMatrix () const
BesError	covRZPMatrix () const
const BesError &	covMatrix () const
void	setCovMatrix (const BesError &v)

Detailed Description

Definition at line 44 of file BesPointErr.h.

Member Enumeration Documentation

CylindricalCoordinateIndex

enum BesPointErr::CylindricalCoordinateIndex

Enumerator
C_Rho
C_Zeta
C_Phi
NUM_CCOORDINATES

Definition at line 53 of file BesPointErr.h.

                                    {   
      C_Rho = 0, 
      C_Zeta = 1, 
      C_Phi = 2,
      NUM_CCOORDINATES = 3
    };

PolarCoordinateIndex

enum BesPointErr::PolarCoordinateIndex

Enumerator
Rho
Theta
Phi
NUM_PCOORDINATES

Definition at line 47 of file BesPointErr.h.

                              {   
      Rho = 0, 
      Theta = 1, 
      Phi = 2,
      NUM_PCOORDINATES = 3
    };

Constructor & Destructor Documentation

BesPointErr() [1/4]

BesPointErr::BesPointErr ( )

inline

Definition at line 59 of file BesPointErr.h.

: HepPoint3D(), _covMatrix(3)       {}

BesPointErr() [2/4]

BesPointErr::BesPointErr ( const HepPoint3D & p )

inline

Definition at line 60 of file BesPointErr.h.

                                     : HepPoint3D(p),
                       _covMatrix(3)                        {}

BesPointErr() [3/4]

BesPointErr::BesPointErr ( const HepPoint3D & p, const BesError & covMat )

inline

Definition at line 62 of file BesPointErr.h.

                                                             : HepPoint3D(p),
                                   _covMatrix(3)                        { _covMatrix=covMat; }

BesPointErr() [4/4]

BesPointErr::BesPointErr ( const BesPointErr & v )

inline

Definition at line 66 of file BesPointErr.h.

: HepPoint3D(),_covMatrix(3)    {*this = v;}

Member Function Documentation

covMatrix()

const BesError & BesPointErr::covMatrix ( ) const

inline

Definition at line 84 of file BesPointErr.h.

{ return _covMatrix; }

Referenced by covRTPMatrix(), covRZPMatrix(), TrkHelixUtils::helixFromMomErr(), TrkHelixUtils::lineFromMomErr(), and operator<<().

covRTPMatrix()

BesError BesPointErr::covRTPMatrix

(

)

const

Definition at line 83 of file BesPointErr.cxx.

                                        {
  // protect against 0's
  double xv = x()==0 ?  FLT_MIN : x();
  double yv = y()==0 ?  FLT_MIN : y();
  double zv = z()==0 ?  FLT_MIN : z();
  DifNumber xDF(xv,X+1,3), yDF(yv,Y+1,3), zDF(zv,Z+1,3);
  DifArray pars(3,NUM_PCOORDINATES);
  pars[Rho]   =  sqrt(xDF*xDF + yDF*yDF + zDF*zDF);
  pars[Phi]   = atan2(yDF,xDF);
  pars[Theta] = acos(zDF/pars[Rho]);
  return covMatrix().similarity(pars.jacobian());
}

covRZPMatrix()

BesError BesPointErr::covRZPMatrix

(

)

const

Definition at line 96 of file BesPointErr.cxx.

                                        {
  // protect against 0's
  double xv = x()==0 ?  FLT_MIN : x();
  double yv = y()==0 ?  FLT_MIN : y();
  double zv = z()==0 ?  FLT_MIN : z();
  DifNumber xDF(xv,X+1,3), yDF(yv,Y+1,3), zDF(zv,Z+1,3);
  DifArray pars(3,NUM_CCOORDINATES);
  pars[C_Rho]   =  sqrt(xDF*xDF + yDF*yDF );
  pars[C_Phi]   = atan2(yDF,xDF);
  pars[C_Zeta] =  zDF;
  return covMatrix().similarity(pars.jacobian());
}

determineChisq()

double BesPointErr::determineChisq ( const HepPoint3D & diffPoint ) const

inline

Definition at line 68 of file BesPointErr.h.

    {
      HepVector temp(3);
      temp[0] = diffPoint.x()-this->x();
      temp[1] = diffPoint.y()-this->y();
      temp[2] = diffPoint.z()-this->z();
      return _covMatrix.determineChisq(temp);
    }

setCovMatrix()

void BesPointErr::setCovMatrix ( const BesError & v )

inline

Definition at line 85 of file BesPointErr.h.

{ _covMatrix = v; }

Referenced by operator>>().

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

• BesPointErr.h
• BesPointErr.cxx