hep.lcd.event
Interface Track

All Superinterfaces:

Hep3Vector

All Known Implementing Classes:

FoundTrack, ReconstructedTrack, ReconTrack, ZvTrack

public interface Track

extends Hep3Vector

Represents a found (reconstructed) track

Author:

tonyj

Method Summary

boolean	fitSuccess() Returns true if the track has been successfully fitted
int	getCharge()
double	getChi2() Get the Chi Squared for the track fit
double[][]	getErrorMatrix() Get the error matrix as a 2-D array
double	getErrorMatrixElement(int i, int j) Get an individual element of the error matrix
MCParticle	getMCParticle()
double[]	getMomentum()
double	getMomentumX() Deprecated. use getPX()
double	getMomentumY() Deprecated. use getPY()
double	getMomentumZ() Deprecated. use getPZ()
double	getNDF() Get the numbers of degrees of freedom for the fit
double[]	getOrigin()
double	getOriginX()
double	getOriginY()
double	getOriginZ()
double	getPX()
double	getPY()
double	getPZ()
double	getTrackParameter(int i) Get an individual track parameter The track parameters for LCD are defined as follows IndexMeaning 0 d0 = XY impact parameter 1 phi0 2 omega = 1/curv.radius (negative for negative tracks) 3 z0 = z of track origin (z impact parameter) 4 s = tan lambda
double[]	getTrackParameters() Get the track parameters as an array

Methods inherited from interface hep.physics.Hep3Vector

cosTheta, mag, mag2, v, x, y, z

Method Detail

getCharge

public int getCharge()

getOrigin

public double[] getOrigin()

getOriginX

public double getOriginX()

getOriginY

public double getOriginY()

getOriginZ

public double getOriginZ()

getMomentum

public double[] getMomentum()

getPX

public double getPX()

getPY

public double getPY()

getPZ

public double getPZ()

getMCParticle

public MCParticle getMCParticle()

fitSuccess

public boolean fitSuccess()

Returns true if the track has been successfully fitted

getTrackParameter

public double getTrackParameter(int i)

Get an individual track parameter The track parameters for LCD are defined as follows

Index	Meaning
0	d0 = XY impact parameter
1	phi0
2	omega = 1/curv.radius (negative for negative tracks)
3	z0 = z of track origin (z impact parameter)
4	s = tan lambda

Parameters:

i - The index of the track parameter

Returns:

The track parameter with the specified index

getTrackParameters

public double[] getTrackParameters()

Get the track parameters as an array

See Also:

getTrackParameter(int)

getErrorMatrixElement

public double getErrorMatrixElement(int i,
                                    int j)

Get an individual element of the error matrix

See Also:

getTrackParameter(int)

getErrorMatrix

public double[][] getErrorMatrix()

Get the error matrix as a 2-D array

See Also:

getTrackParameter(int)

getChi2

public double getChi2()

Get the Chi Squared for the track fit

Returns:

Chi Squared

See Also:

getNDF()

getNDF

public double getNDF()

Get the numbers of degrees of freedom for the fit

Returns:

The number of degrees of freedom

See Also:

getChi2()

getMomentumX

public double getMomentumX()

Deprecated. use getPX()

getMomentumY

public double getMomentumY()

Deprecated. use getPY()

getMomentumZ

public double getMomentumZ()

Deprecated. use getPZ()