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CurvilinearState Class Reference

State for solving the equation of motion with Z as free variable. More...

#include <TrackPropagation/RungeKutta/interface/CurvilinearState.h>

List of all members.

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 (const Vector3D &pos, const Vector3D &p, Scalar ch)
	CurvilinearState (const Vector &v, Scalar z, Scalar pzsign)
	CurvilinearState ()
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
Scalar	z_

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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 20 of file CurvilinearState.h.

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Member Typedef Documentation

typedef double CurvilinearState::Scalar

Definition at line 23 of file CurvilinearState.h.

typedef VectorDoublet<Vector2D,Vector3D> CurvilinearState::Vector

Definition at line 26 of file CurvilinearState.h.

typedef Basic2DVector<Scalar> CurvilinearState::Vector2D

Definition at line 24 of file CurvilinearState.h.

typedef Basic3DVector<Scalar> CurvilinearState::Vector3D

Definition at line 25 of file CurvilinearState.h.

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Constructor & Destructor Documentation

CurvilinearState::CurvilinearState

(

)

[inline]

Definition at line 28 of file CurvilinearState.h.

{}

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

Definition at line 33 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.) {}

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Member Function Documentation

Scalar CurvilinearState::charge

(

void

)

const [inline]

Definition at line 54 of file CurvilinearState.h.

References par_, and VectorDoublet< V1, V2 >::second().

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

const Vector3D CurvilinearState::momentum

(

)

const [inline]

Definition at line 41 of file CurvilinearState.h.

References p, par_, pzSign_, VectorDoublet< V1, V2 >::second(), and funct::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 52 of file CurvilinearState.h.

References par_.

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

{ return par_;}

const Vector3D CurvilinearState::position

(

void

)

const [inline]

Definition at line 37 of file CurvilinearState.h.

References VectorDoublet< V1, V2 >::first(), par_, and z_.

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

double CurvilinearState::pzSign

(

)

const [inline]

Definition at line 58 of file CurvilinearState.h.

References pzSign_.

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

{return pzSign_;}

Scalar CurvilinearState::z

(

void

)

const [inline]

Definition at line 56 of file CurvilinearState.h.

References z_.

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

{return z_;}

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Member Data Documentation

Vector CurvilinearState::par_ [private]

Definition at line 62 of file CurvilinearState.h.

Referenced by charge(), momentum(), parameters(), and position().

Scalar CurvilinearState::pzSign_ [private]

sign of local pz

Definition at line 64 of file CurvilinearState.h.

Referenced by momentum(), and pzSign().

Scalar CurvilinearState::z_ [private]

Definition at line 63 of file CurvilinearState.h.

Referenced by position(), and z().

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

• TrackPropagation/RungeKutta/interface/CurvilinearState.h

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