HelicalTrackStrip (LCSim 3.1.7 API)

java.lang.Object
- org.lcsim.fit.helicaltrack.HelicalTrackStrip

```
public class HelicalTrackStrip
extends Object
```
Encapsulate strip information used to construct HelicalTrack2DHit and HelicalTrackCross hits. The hit position is given by: pos = origin + umeas * uhat + v * vhat where v is the unmeasured coordinate along the strip direction.

Version:

1.0

Author:

Richard Partridge

Field Summary

Fields
Modifier and Type	Field and Description
`private BarrelEndcapFlag`	`_beflag`
`private double`	`_dEdx`
`private String`	`_detector`
`private double`	`_du`
`private double`	`_eps`
`private int`	`_layer`
`private List<MCParticle>`	`_mcplist`
`private Hep3Vector`	`_origin`
`private List`	`_rawhits`
`private double`	`_time`
`protected Hep3Vector`	`_u`
`private double`	`_umeas`
`protected Hep3Vector`	`_v`
`private double`	`_vmax`
`private double`	`_vmin`
`protected Hep3Vector`	`_w`

Constructor Summary

Constructors
Constructor and Description
`HelicalTrackStrip(Hep3Vector origin, Hep3Vector u, Hep3Vector v, double umeas, double du, double vmin, double vmax, double dEdx, double time, List rawhits, String detector, int layer, BarrelEndcapFlag beflag)` Creates a new instance of HelicalTrackStripHit.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addMCParticle(MCParticle mcp)`
`BarrelEndcapFlag`	`BarrelEndcapFlag()`
`double`	`dEdx()`
`String`	`detector()`
`double`	`du()` Return the uncertainty in the measured coordinate.
`protected void`	`initW()`
`int`	`layer()`
`List<MCParticle>`	`MCParticles()`
`Hep3Vector`	`origin()` Return the global position of the origin for the local strip coordinates.
`List`	`rawhits()`
`double`	`time()`
`String`	`toString()`
`Hep3Vector`	`u()` Return a unit vector parallel to the measurement direction for the strip.
`double`	`umeas()` Return the measured coordinate.
`Hep3Vector`	`v()` Return a unit vector that is parallel to the strip.
`double`	`vmax()` Return the maximum value for the unmeasured coordinate.
`double`	`vmin()` Return the minimum value for the unmeasured coordinate.
`Hep3Vector`	`w()` Return a unit vector that is normal to the sensor plane (u x v = w).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

_origin
```
private Hep3Vector _origin
```

_u
```
protected Hep3Vector _u
```

_v
```
protected Hep3Vector _v
```

_w
```
protected Hep3Vector _w
```

_umeas
```
private double _umeas
```

_du
```
private double _du
```

_vmin
```
private double _vmin
```

_vmax
```
private double _vmax
```

_dEdx
```
private double _dEdx
```

_time
```
private double _time
```

_rawhits
```
private List _rawhits
```

_detector
```
private String _detector
```

_layer
```
private int _layer
```

_beflag
```
private BarrelEndcapFlag _beflag
```

_mcplist
```
private List<MCParticle> _mcplist
```

_eps
```
private double _eps
```

Constructor Detail

HelicalTrackStrip

public HelicalTrackStrip(Hep3Vector origin,
                 Hep3Vector u,
                 Hep3Vector v,
                 double umeas,
                 double du,
                 double vmin,
                 double vmax,
                 double dEdx,
                 double time,
                 List rawhits,
                 String detector,
                 int layer,
                 BarrelEndcapFlag beflag)

Creates a new instance of HelicalTrackStripHit.

Parameters:: origin - global position of local coordinate origin; u - vector parallel to the measurement direction; v - vector parallel to the strip direction; umeas - measured coordinate; du - uncertainty in the measured coordinate; vmin - minimum value of the unmeasured coordinate; vmax - maximum value of the unmeasured coordinate

Method Detail
- initW
```
protected void initW()
```
- origin
```
public Hep3Vector origin()
```
  Return the global position of the origin for the local strip coordinates.
  
  Returns:
  origin of the local coordinates
- u
```
public Hep3Vector u()
```
  Return a unit vector parallel to the measurement direction for the strip.
  
  Returns:
  measured direction unit vector
- v
```
public Hep3Vector v()
```
  Return a unit vector that is parallel to the strip.
  
  Returns:
  unmeasured direction unit vector
- w
```
public Hep3Vector w()
```
  Return a unit vector that is normal to the sensor plane (u x v = w).
  
  Returns:
  sensor normal unit vector
- umeas
```
public double umeas()
```
  Return the measured coordinate.
  
  Returns:
  measured coordinate
- du
```
public double du()
```
  Return the uncertainty in the measured coordinate.
  
  Returns:
  uncertainty in the measured coordinate
- vmin
```
public double vmin()
```
  Return the minimum value for the unmeasured coordinate.
  
  Returns:
  minimum of the unmeasured coordinate
- vmax
```
public double vmax()
```
  Return the maximum value for the unmeasured coordinate.
  
  Returns:
  maximum of the measured coordinate
- dEdx
```
public double dEdx()
```
- time
```
public double time()
```
- rawhits
```
public List rawhits()
```
- detector
```
public String detector()
```
- layer
```
public int layer()
```
- BarrelEndcapFlag
```
public BarrelEndcapFlag BarrelEndcapFlag()
```
- addMCParticle
```
public void addMCParticle(MCParticle mcp)
```
- MCParticles
```
public List<MCParticle> MCParticles()
```
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object

Class HelicalTrackStrip

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

_origin

_u

_v

_w

_umeas

_du

_vmin

_vmax

_dEdx

_time

_rawhits

_detector

_layer

_beflag

_mcplist

_eps

Constructor Detail

HelicalTrackStrip

Method Detail

initW

origin

u

v

w

umeas

du

vmin

vmax

dEdx

time

rawhits

detector

layer

BarrelEndcapFlag

addMCParticle

MCParticles

toString