CurvilinearState Class Reference

#include <CurvilinearState.h>

Public Types
typedef double	Scalar
typedef VectorDoublet< Vector2D, Vector3D >	Vector
typedef Basic2DVector< Scalar >	Vector2D
typedef Basic3DVector< Scalar >	Vector3D

Public Member Functions
Scalar	charge () const
	CurvilinearState ()
	CurvilinearState (const Vector &v, Scalar z, Scalar pzsign)
	CurvilinearState (const Vector3D &pos, const Vector3D &p, Scalar ch)
const Vector3D	momentum () const
const Vector &	parameters () const
const Vector3D	position () const
double	pzSign () const
Scalar	z () const

Private Attributes
Vector	par_
Scalar	pzSign_
	sign of local pz More...
Scalar	z_

Detailed Description

State for solving the equation of motion with Z as free variable. The dependent variables are x - x coordinate y - y coordinate dx/dz - derivative of x versus z dy/dz - derivative of y versus z q/p - charge over momentum magnitude

The coordinate system is externally defined

Definition at line 21 of file CurvilinearState.h.

Member Typedef Documentation

Scalar

typedef double CurvilinearState::Scalar

Definition at line 23 of file CurvilinearState.h.

Vector

typedef VectorDoublet<Vector2D, Vector3D> CurvilinearState::Vector

Definition at line 26 of file CurvilinearState.h.

Vector2D

typedef Basic2DVector<Scalar> CurvilinearState::Vector2D

Definition at line 24 of file CurvilinearState.h.

Vector3D

typedef Basic3DVector<Scalar> CurvilinearState::Vector3D

Definition at line 25 of file CurvilinearState.h.

Constructor & Destructor Documentation

CurvilinearState() [1/3]

CurvilinearState::CurvilinearState ( )

inline

Definition at line 28 of file CurvilinearState.h.

{}

CurvilinearState() [2/3]

CurvilinearState::CurvilinearState ( const Vector &  v, Scalar  z, Scalar  pzsign  )

inline

Definition at line 30 of file CurvilinearState.h.

: par_(v), z_(z), pzSign_(pzsign) {}

CurvilinearState() [3/3]

CurvilinearState::CurvilinearState ( const Vector3D &  pos, const Vector3D &  p, Scalar  ch  )

inline

Definition at line 32 of file CurvilinearState.h.

      : par_(Vector2D(pos.x(), pos.y()), Vector3D(p.x() / p.z(), p.y() / p.z(), ch / p.mag())),
        z_(pos.z()),
        pzSign_(p.z() > 0. ? 1. : -1.) {}

Member Function Documentation

charge()

Scalar CurvilinearState::charge ( void  ) const

inline

Definition at line 53 of file CurvilinearState.h.

{ return par_.second().z() > 0 ? 1 : -1; }

momentum()

const Vector3D CurvilinearState::momentum ( ) const

inline

Definition at line 39 of file CurvilinearState.h.

                                  {
    Scalar p = 1. / fabs(par_.second().z());
    if (p > 1.e9)
      p = 1.e9;
    Scalar dxdz = par_.second().x();
    Scalar dydz = par_.second().y();
    Scalar dz = pzSign_ / sqrt(1. + dxdz * dxdz + dydz * dydz);
    Scalar dx = dz * dxdz;
    Scalar dy = dz * dydz;
    return Vector3D(dx * p, dy * p, dz * p);
  }

References PVValHelper::dx, BeamSpotPI::dxdz, PVValHelper::dy, BeamSpotPI::dydz, PVValHelper::dz, AlCaHLTBitMon_ParallelJobs::p, and mathSSE::sqrt().

parameters()

const Vector& CurvilinearState::parameters ( void  ) const

inline

Definition at line 51 of file CurvilinearState.h.

{ return par_; }

position()

const Vector3D CurvilinearState::position ( ) const

inline

Definition at line 37 of file CurvilinearState.h.

{ return Vector3D(par_.first().x(), par_.first().y(), z_); }

pzSign()

double CurvilinearState::pzSign ( ) const

inline

Definition at line 57 of file CurvilinearState.h.

{ return pzSign_; }

z()

Scalar CurvilinearState::z ( ) const

inline

Definition at line 55 of file CurvilinearState.h.

{ return z_; }

Referenced by geometryXMLparser.Alignable::pos(), and ntupleDataFormat._HitObject::r3D().

Member Data Documentation

par_

Vector CurvilinearState::par_

private

Definition at line 60 of file CurvilinearState.h.

pzSign_

Scalar CurvilinearState::pzSign_

private

sign of local pz

Definition at line 62 of file CurvilinearState.h.

z_

Scalar CurvilinearState::z_

private

Definition at line 61 of file CurvilinearState.h.