TrackState

All Superinterfaces:

Cloneable, LCObject

All Known Implementing Classes:

ITrackState
```
public interface TrackState
extends LCObject
```
The LCIO TrackState class.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`AtCalorimeter`
`static int`	`AtFirstHit`
`static int`	`AtIP`
`static int`	`AtLastHit`
`static int`	`AtOther`
`static int`	`AtVertex`
`static int`	`LastLocation`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`float[]`	`getCovMatrix()` Covariance matrix of the track parameters.
`float`	`getD0()` Impact paramter of the track in (r-phi).
`int`	`getLocation()` The location of the track state.
`float`	`getOmega()` Omega is the signed curvature of the track in [1/mm].
`float`	`getPhi()` Phi of the track at the reference point.
`float[]`	`getReferencePoint()` Reference point of the track parameters, e.g.
`float`	`getTanLambda()` Lambda is the dip angle of the track in r-z at the reference point.
`float`	`getZ0()` Impact paramter of the track in (r-z).

- Field Detail
  - AtOther
```
static final int AtOther
```
    See Also:
    
    Constant Field Values
  - AtIP
```
static final int AtIP
```
    See Also:
    
    Constant Field Values
  - AtFirstHit
```
static final int AtFirstHit
```
    See Also:
    
    Constant Field Values
  - AtLastHit
```
static final int AtLastHit
```
    See Also:
    
    Constant Field Values
  - AtCalorimeter
```
static final int AtCalorimeter
```
    See Also:
    
    Constant Field Values
  - AtVertex
```
static final int AtVertex
```
    See Also:
    
    Constant Field Values
  - LastLocation
```
static final int LastLocation
```
    See Also:
    
    Constant Field Values
- Method Detail
  - getLocation
```
int getLocation()
```
    The location of the track state. Location can be set to: TrackState::AtIP, TrackState::AtFirstHit, TrackState::AtLastHit, TrackState::AtCalorimeter, TrackState::AtVertex, TrackState::AtOther
  - getD0
```
float getD0()
```
    Impact paramter of the track in (r-phi).
  - getPhi
```
float getPhi()
```
    Phi of the track at the reference point.
    
    See Also:
    
    getReferencePoint
  - getOmega
```
float getOmega()
```
    Omega is the signed curvature of the track in [1/mm]. The sign is that of the particle's charge.
  - getZ0
```
float getZ0()
```
    Impact paramter of the track in (r-z).
  - getTanLambda
```
float getTanLambda()
```
    Lambda is the dip angle of the track in r-z at the reference point.
    
    See Also:
    
    getReferencePoint
  - getCovMatrix
```
float[] getCovMatrix()
```
    Covariance matrix of the track parameters. Stored as lower triangle matrix where the order of parameters is: d0, phi, omega, z0, tan(lambda). So we have cov(d0,d0), cov( phi, d0 ), cov( phi, phi), ...
  - getReferencePoint
```
float[] getReferencePoint()
```
    Reference point of the track parameters, e.g. the origin at the IP, or the position of the first/last hits or the entry point into the calorimeter.

Interface TrackState

Field Summary

Method Summary

Field Detail

AtOther

AtIP

AtFirstHit

AtLastHit

AtCalorimeter

AtVertex

LastLocation

Method Detail

getLocation

getD0

getPhi

getOmega

getZ0

getTanLambda

getCovMatrix

getReferencePoint