#include "SurfLine.h"

Inheritance diagram for trkf::SurfLine:

Public Types
enum	TrackDirection { FORWARD, BACKWARD, UNKNOWN }
	Track direction enum. More...

Public Member Functions
	SurfLine ()
	Default constructor. More...

virtual	~SurfLine ()
	Destructor. More...

double	PointingError (const TrackVector &vec, const TrackError &err) const
	Get pointing error of track. More...

void	getStartingError (TrackError &err) const
	Get starting error matrix for Kalman filter. More...

virtual Surface *	clone () const =0
	Clone method. More...

virtual bool	isTrackValid (const TrackVector &vec) const =0
	Surface-specific tests of validity of track parameters. More...

virtual void	toLocal (const double xyz[3], double uvw[3]) const =0
	Transform global to local coordinates. More...

virtual void	toGlobal (const double uvw[3], double xyz[3]) const =0
	Transform local to global coordinates. More...

virtual TrackVector	getDiff (const TrackVector &vec1, const TrackVector &vec2) const
	Calculate difference of two track parameter vectors. More...

virtual void	getPosition (const TrackVector &vec, double xyz[3]) const =0
	Get position of track. More...

virtual TrackDirection	getDirection (const TrackVector &, TrackDirection dir=UNKNOWN) const
	Get direction of track (default UNKNOWN). More...

virtual void	getMomentum (const TrackVector &vec, double mom[3], TrackDirection dir=UNKNOWN) const =0
	Get momentum vector of track. More...

virtual bool	isParallel (const Surface &surf) const =0
	Test whether two surfaces are parallel, within tolerance. More...

virtual double	distanceTo (const Surface &surf) const =0
	Find perpendicular forward distance to a parallel surface. More...

virtual bool	isEqual (const Surface &surf) const =0
	Test two surfaces for equality, within tolerance. More...

virtual std::ostream &	Print (std::ostream &out) const =0
	Printout. More...

Detailed Description

Definition at line 58 of file SurfLine.h.

Member Enumeration Documentation

enum trkf::Surface::TrackDirection

inherited

Track direction enum.

Enumerator
FORWARD
BACKWARD
UNKNOWN

Definition at line 56 of file Surface.h.

56 {FORWARD, BACKWARD, UNKNOWN};

trkf::Surface::BACKWARD

Definition: Surface.h:56

trkf::Surface::UNKNOWN

Definition: Surface.h:56

trkf::Surface::FORWARD

Definition: Surface.h:56

Constructor & Destructor Documentation

trkf::SurfLine::SurfLine ( )

Default constructor.

Definition at line 17 of file SurfLine.cxx.

18 {}

trkf::SurfLine::~SurfLine ( )

virtual

Destructor.

Definition at line 21 of file SurfLine.cxx.

22 {}

Member Function Documentation

virtual Surface* trkf::Surface::clone ( ) const

pure virtualinherited

Clone method.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

virtual double trkf::Surface::distanceTo ( const Surface & surf ) const

pure virtualinherited

Find perpendicular forward distance to a parallel surface.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::Surface::getDirection().

TrackVector trkf::Surface::getDiff	(	const TrackVector &	vec1,
		const TrackVector &	vec2
	)		const

virtualinherited

Calculate difference of two track parameter vectors.

Calculate difference of two track parameter vectors. This method has a default implementation which is just the numeric difference. Surfaces that require a more sophisticated difference (e.g. phi-wrap difference) should override this method.

Reimplemented in trkf::SurfYZLine.

Definition at line 33 of file Surface.cxx.

   {
     return vec1 - vec2;
   }

virtual TrackDirection trkf::Surface::getDirection	(	const TrackVector &	,
		TrackDirection	dir = `UNKNOWN`
	)		const

inlinevirtualinherited

Get direction of track (default UNKNOWN).

Definition at line 85 of file Surface.h.

References dir, trkf::Surface::distanceTo(), trkf::Surface::getMomentum(), trkf::Surface::getStartingError(), trkf::Surface::isEqual(), trkf::Surface::isParallel(), trkf::operator<<(), trkf::Surface::PointingError(), and trkf::Surface::Print().

Referenced by trkf::SurfYZPlane::getMomentum(), and trkf::SurfXYZPlane::getMomentum().

86 {return dir;}

dir

TDirectory * dir

Definition: macro.C:5

virtual void trkf::Surface::getMomentum	(	const TrackVector &	vec,
		double	mom[3],
		TrackDirection	dir = `UNKNOWN`
	)		const

pure virtualinherited

Get momentum vector of track.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::Surface::getDirection().

virtual void trkf::Surface::getPosition	(	const TrackVector &	vec,
		double	xyz[3]
	)		const

pure virtualinherited

Get position of track.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

void trkf::SurfLine::getStartingError ( TrackError & err ) const

virtual

Get starting error matrix for Kalman filter.

Arguments:

err - Error matrix.

Implements trkf::Surface.

Definition at line 92 of file SurfLine.cxx.

                                                        {
     err.resize(5, false);
     err.clear();
     err(0, 0) = 1000.;
     err(1, 1) = 1000.;
     err(2, 2) = 10.;
     err(3, 3) = 10.;
     err(4, 4) = 10.;
   }

virtual bool trkf::Surface::isEqual ( const Surface & surf ) const

pure virtualinherited

Test two surfaces for equality, within tolerance.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::Surface::getDirection().

virtual bool trkf::Surface::isParallel ( const Surface & surf ) const

pure virtualinherited

Test whether two surfaces are parallel, within tolerance.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::Surface::getDirection().

virtual bool trkf::Surface::isTrackValid ( const TrackVector & vec ) const

pure virtualinherited

Surface-specific tests of validity of track parameters.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

double trkf::SurfLine::PointingError	(	const TrackVector &	vec,
		const TrackError &	err
	)		const

virtual

Get pointing error of track.

Arguments:

vec - Track parameters. err - Track error matrix.

Returns: Pointing error.

This method calculates the track pointing error based on the slope track paramers and errors (parameters 2 and 3).

Implements trkf::Surface.

Definition at line 36 of file SurfLine.cxx.

   { 
     // Get slope parameters and error matrix.
 
     double phi = vec(2);
     double eta = vec(3);
     double epp = err(2, 2);  // sigma^2(phi,phi)
     double ehh = err(3, 3);  // sigma^2(eta,eta)
     double ehp = err(3, 2);  // sigma^2(eta,phi)
 
     // Calculate error matrix of pointing unit vector in some coordinate system.
 
     double sh = 1./std::cosh(eta);  // sech(eta)
     double sh2 = sh*sh;
     double sh3 = sh*sh2;
     double sh4 = sh*sh3;
 
     double th = std::tanh(eta);
     double th2 = th*th;
 
     double cphi = std::cos(phi);
     double cphi2 = cphi*cphi;
 
     double sphi = std::sin(phi);
     double sphi2 = sphi*sphi;
 
     double vxx = sh2*th2*cphi2 * ehh + sh2*sphi2 * epp + 2.*sh2*th*sphi*cphi * ehp;
     double vyy = sh2*th2*sphi2 * ehh + sh2*cphi2 * epp - 2.*sh2*th*sphi*cphi * ehp;
     double vzz = sh4 * epp;
 
     double vxy = sh2*th2*sphi*cphi * ehh - sh2*sphi*cphi * epp - sh2*th*(cphi2-sphi2) * ehp;
     double vyz = -sh3*th*sphi * ehh + sh3*cphi * ehp;
     double vxz = -sh3*th*cphi * ehh - sh3*sphi * ehp;
 
     // For debugging.  The determinant of the error matrix should be zero.
 
     // double det = vxx*vyy*vzz + 2.*vxy*vyz*vxz - vxx*vyz*vyz - vyy*vxz*vxz - vzz*vxy*vxy;
 
     // Calculate square root of the largest eigenvalue of error matrix.
 
     double ddd2 = vxx*vxx + vyy*vyy + vzz*vzz
                   - 2.*vxx*vyy - 2.*vxx*vzz - 2.*vyy*vzz
                   + 4.*vxy*vxy + 4.*vyz*vyz + 4.*vxz*vxz;
     double ddd = sqrt(ddd2 > 0. ? ddd2 : 0.);
     double lambda2 = 0.5 * ( vxx + vyy + vzz + ddd);
     double lambda = sqrt(lambda2 > 0. ? lambda2 : 0.);
 
     return lambda;
   }

virtual std::ostream& trkf::Surface::Print ( std::ostream & out ) const

pure virtualinherited

Printout.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::Surface::getDirection(), and trkf::operator<<().

virtual void trkf::Surface::toGlobal	(	const double	uvw[3],
		double	xyz[3]
	)		const

pure virtualinherited

Transform local to global coordinates.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

Referenced by trkf::SurfYZPlane::distanceTo(), trkf::SurfYZLine::distanceTo(), and trkf::SurfXYZPlane::distanceTo().

virtual void trkf::Surface::toLocal	(	const double	xyz[3],
		double	uvw[3]
	)		const

pure virtualinherited

Transform global to local coordinates.

Implemented in trkf::SurfXYZPlane, trkf::SurfYZLine, and trkf::SurfYZPlane.

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

/cvmfs/larsoft.opensciencegrid.org/products/lardata/v07_01_01/source/lardata/RecoObjects/SurfLine.h
/cvmfs/larsoft.opensciencegrid.org/products/lardata/v07_01_01/source/lardata/RecoObjects/SurfLine.cxx

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation