org.lcsim.fit.helicaltrack

Class HelicalTrack2DHit

java.lang.Object

org.lcsim.fit.helicaltrack.HelicalTrackHit

org.lcsim.fit.helicaltrack.HelicalTrack2DHit

All Implemented Interfaces:

Comparable, TrackerHit

public class HelicalTrack2DHit
extends HelicalTrackHit

Encapsulate 2D hit info needed by HelicalTrackFitter. This class is applicable to axial barrel strip hits that measure the r-phi coordinate and place limits on the z coordinate.

Version:

1.0

Author:

Richard Partridge

Field Summary

Fields

Modifier and Type	Field and Description
private static int	_type
private double	_zmax
private double	_zmin

Fields inherited from class org.lcsim.fit.helicaltrack.HelicalTrackHit

_eps, _epsParallel, _epsStereoAngle, id

Constructor Summary

Constructors

Constructor and Description
HelicalTrack2DHit(Hep3Vector pos, SymmetricMatrix cov, double dEdx, double time, List rawhits, String detname, int layer, BarrelEndcapFlag beflag, double zmin, double zmax) Create a HelicalTrack2DHit from the associated TrackerHit and HelicalTrackStrip.

Method Summary

Methods

Modifier and Type	Method and Description
double	zlen() Return the length of the strip along the z direction.
double	zmax() Return the maximum z coordinate.
double	zmin() Return the minimum z coordinate.

Methods inherited from class org.lcsim.fit.helicaltrack.HelicalTrackHit

addMCParticle, addRawHit, BarrelEndcapFlag, chisq, compareTo, Detector, dr, drcalc, drphi, drphicalc, getCellID, getCorrectedCovMatrix, getCorrectedPosition, getCovMatrix, getdEdx, getEdepError, getEpsParallel, getLayerIdentifier, getMCParticles, getPosition, getQuality, getRawHits, getTime, getType, init, Layer, phi, r, setChisq, setCorrectedCovMatrix, setCorrectedPosition, setEpsParallel, setEpsStereoAngle, setPosition, toString, x, y, z

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

_zmin

private double _zmin

_zmax

private double _zmax

_type

private static int _type

Constructor Detail

HelicalTrack2DHit

public HelicalTrack2DHit(Hep3Vector pos,
                 SymmetricMatrix cov,
                 double dEdx,
                 double time,
                 List rawhits,
                 String detname,
                 int layer,
                 BarrelEndcapFlag beflag,
                 double zmin,
                 double zmax)

Create a HelicalTrack2DHit from the associated TrackerHit and HelicalTrackStrip.

Parameters:

pos - location of the strip center

cov - covariance matrix for the hit

dEdx - deposited energy

time - hit time

rawhits - list of raw hits

zmin - minimum z for the strip

zmax - maximum z for the strip

detname - detector name

layer - layer number

beflag -

Method Detail

zmin

public double zmin()

Return the minimum z coordinate.

Returns:

minimum z coordinate

zmax

public double zmax()

Return the maximum z coordinate.

Returns:

maximum z coordinate

zlen

public double zlen()

Return the length of the strip along the z direction.

Returns:

strip length