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

typedef double CurvilinearState::Scalar

Definition at line 24 of file CurvilinearState.h.

typedef VectorDoublet<Vector2D,Vector3D> CurvilinearState::Vector

Definition at line 27 of file CurvilinearState.h.

typedef Basic2DVector<Scalar> CurvilinearState::Vector2D

Definition at line 25 of file CurvilinearState.h.

typedef Basic3DVector<Scalar> CurvilinearState::Vector3D

Definition at line 26 of file CurvilinearState.h.

Constructor & Destructor Documentation

CurvilinearState::CurvilinearState ( )

inline

Definition at line 29 of file CurvilinearState.h.

{}

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

inline

Definition at line 31 of file CurvilinearState.h.

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

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

inline

Definition at line 34 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

Scalar CurvilinearState::charge ( void  ) const

inline

Definition at line 55 of file CurvilinearState.h.

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

const Vector3D CurvilinearState::momentum ( ) const

inline

Definition at line 42 of file CurvilinearState.h.

References AlCaHLTBitMon_ParallelJobs::p, and mathSSE::sqrt().

                                  {
    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);
  }

const Vector& CurvilinearState::parameters ( void  ) const

inline

Definition at line 53 of file CurvilinearState.h.

Referenced by operator*(), operator+(), operator-(), and operator/().

{ return par_;}

const Vector3D CurvilinearState::position ( ) const

inline

Definition at line 38 of file CurvilinearState.h.

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

double CurvilinearState::pzSign ( ) const

inline

Definition at line 59 of file CurvilinearState.h.

Referenced by operator*(), operator+(), operator-(), and operator/().

{return pzSign_;}

Scalar CurvilinearState::z ( ) const

inline

Definition at line 57 of file CurvilinearState.h.

Referenced by operator*(), operator+(), operator-(), operator/(), and geometryXMLparser.Alignable::pos().

{return z_;}

Member Data Documentation

Vector CurvilinearState::par_

private

Definition at line 63 of file CurvilinearState.h.

Scalar CurvilinearState::pzSign_

private

sign of local pz

Definition at line 65 of file CurvilinearState.h.

Scalar CurvilinearState::z_

private

Definition at line 64 of file CurvilinearState.h.