CSCTrack Class Reference

The CSCTrack class will store a track segment within a chamber. More...

#include <CSCTrack.h>

List of all members.

Public Member Functions
	CSCTrack ()
	Constructor for intialization.
	~CSCTrack ()
	Destructor.
void	Print ()
	Print parameters to stdout for debugging.
double	GetInterceptX ()
	Provides access to linefit parameters:.
double	GetInterceptY ()
	Provides access to linefit parameters:.
double	GetSlopeX ()
	Provides access to linefit parameters:.
double	GetSlopeY ()
	Provides access to linefit parameters:.
double	GetAngleX ()
double	GetSlopeY ()
double	GetChi2X ()
double	GetChi2Y ()
double	GetBitmapX ()
	Provides access to the bitmask of the track: For each layer, a bit is set if a hit has been found.
double	GetBitmapY ()
	Provides access to the bitmask of the track: For each layer, a bit is set if a hit has been found.
int	GetNumHitsX ()
int	GetNumHitsY ()
CSCHit *	GetHitX (int layer)
	Provides access to the hits of this track.
CSCHit *	GetHitY (int layer)
	Provides access to the hits of this track.
double	GetPredictedX (int layer)
	Provides the predicted X position from the line fit.
double	GetPredictedY (int layer)
	Provides the predicted Y position from the line fit.
double	GetMeasuredX (int layer)
	Provides the measured X position from the CSCHit().
double	GetMeasuredY (int layer)
	Provides the measured Y position from the CSCHit().
void	SetOffsetA (int layer, double offset)
	Set the constant offset in the X direction.
void	SetOffsetB (int layer, double offset)
	Set the Y-dependant offset in the X direction.
double	GetOffsetA (int layer)
	Get the constant offset in the X direction.
double	GetOffsetB (int layer)
	Set the Y-dependant offset in the X direction.
CSCChamber *	GetChamber ()
void	SetChamber (CSCChamber *csc)
	Sets the pointer to the chamber of this track.
void	AddHit (CSCHit *hit)
	Adds a CSCHit() to the track.
void	Fit ()
	Performs the line fit in X and Y directions and computes the largest and smallest peaking times of the hits.
double	GetEarliest ()
double	GetLatest ()

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Detailed Description

The CSCTrack class will store a track segment within a chamber.

Warning:

NOTHING HAS BEEN IMPLEMENTED.

This class maintains 4 pointers to X hits and 4 pointers to Y hits. If a layer has no hit, the pointer is NULL.

Each set of 4 hits is fitted to a straight line, where the intercept value marks the crossing of that line with layer 0.

For each layer, the alignment consists of an offset in the X direction with a constant component and a Y-dependent component: Offset = OffsetA + Y * OffsetB. The Offset values can be set manually, or with the GeoServer() class. The Y value for the correction comes from the line fit prediction, not from the Y hit in that plane.

Status

Just an idea in a header file.

Todo:

implement all this and the tracklist class.

See also:

long.cpp implements long tracks through all 4 chambers.

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Member Function Documentation

void CSCTrack::AddHit (  CSCHit *  hit  )

Adds a CSCHit() to the track. Layer and direction are taken from the channelID. The new hit replaces any previous hit for the layer and direction. Parameters: hit  a pointer to the hit to be added to the track.

void CSCTrack::Fit (   )

Performs the line fit in X and Y directions and computes the largest and smallest peaking times of the hits. This is to be called after all hits have been added.

double CSCTrack::GetAngleX (   )  [inline]

Returns: the angle of the slope of the X data line fit in degrees.

double CSCTrack::GetBitmapX (   )  [inline]

Provides access to the bitmask of the track: For each layer, a bit is set if a hit has been found. This can be used to study effiencies. Returns: the the bitmask for the X layers.

double CSCTrack::GetBitmapY (   )  [inline]

Provides access to the bitmask of the track: For each layer, a bit is set if a hit has been found. This can be used to study effiencies. Returns: the the bitmask for the Y layers.

CSCChamber* CSCTrack::GetChamber (   )  [inline]

Returns: a pointer to the CSCChamber() of this track for access to raw data.

double CSCTrack::GetChi2X (   )  [inline]

Returns: the Chi-squared of the X data line fit.

double CSCTrack::GetChi2Y (   )  [inline]

Returns: the Chi-squared of the Y data line fit.

double CSCTrack::GetEarliest (   )  [inline]

Returns: the value of the earliest peaking time.

CSCHit* CSCTrack::GetHitX (  int  layer  )  [inline]

Provides access to the hits of this track. Parameters: layer  the layer number 0-3. Returns: the pointer to the CSCHit() object, or NULL if this layer has no hit.

CSCHit* CSCTrack::GetHitY (  int  layer  )  [inline]

Provides access to the hits of this track. Parameters: layer  the layer number 0-3. Returns: the pointer to the CSCHit() object, or NULL if this layer has no hit.

double CSCTrack::GetInterceptX (   )  [inline]

Provides access to linefit parameters:. Returns: the intercept of the X data line with layer 0.

double CSCTrack::GetInterceptY (   )  [inline]

Provides access to linefit parameters:. Returns: the intercept of the Y data line with layer 0.

double CSCTrack::GetLatest (   )  [inline]

Returns: the value of the latest peaking time.

double CSCTrack::GetMeasuredX (  int  layer  )

Provides the measured X position from the CSCHit(). The shift of layers relative to another is taken into account. Parameters: layer  the layer number in the range 0-3. Returns: the predicted position in channel numbers, or -1 if there is no hit in this layer.

double CSCTrack::GetMeasuredY (  int  layer  )

Provides the measured Y position from the CSCHit(). No shift of layers relative to another is taken into account for the Y direction. Parameters: layer  the layer number in the range 0-3. Returns: the predicted position in channel numbers, or -1 if there is no hit in this layer.

int CSCTrack::GetNumHitsX (   )  [inline]

Returns: the number of hits for the X data, 0-4.

int CSCTrack::GetNumHitsY (   )  [inline]

Returns: the number of hits for the Y data, 0-4.

double CSCTrack::GetOffsetA (  int  layer  )  [inline]

Get the constant offset in the X direction. Parameters: layer  is the layer number, ranging from 0 - 3. Returns: the offset in microns.

double CSCTrack::GetOffsetB (  int  layer  )  [inline]

Set the Y-dependant offset in the X direction. Parameters: layer  is the layer number, ranging from 0 - 3. Returns: offset is the offset in microns.

double CSCTrack::GetPredictedX (  int  layer  )  [inline]

Provides the predicted X position from the line fit. The shift of layers relative to another is taken into account. Parameters: layer  the layer number in the range 0-3. Returns: the predicted position in channel numbers.

double CSCTrack::GetPredictedY (  int  layer  )  [inline]

Provides the predicted Y position from the line fit. The shift of layers relative to another is taken into account. Parameters: layer  the layer number in the range 0-3. Returns: the predicted position in channel numbers.

double CSCTrack::GetSlopeX (   )  [inline]

Provides access to linefit parameters:. Returns: the slope of the X data line fit. The result is in 'natural units": channel distance / layer number.

double CSCTrack::GetSlopeY (   )  [inline]

Returns: the angle of slope of the Y data line fit in degrees.

double CSCTrack::GetSlopeY (   )  [inline]

Provides access to linefit parameters:. Returns: the slope of the Y data line fit. The result is in 'natural units": channel distance / layer number.

void CSCTrack::SetChamber (  CSCChamber *  csc  )  [inline]

Sets the pointer to the chamber of this track. Note: This is done automatically when hits are added to the track. Parameters: csc  the pointer to the CSCChamber() object.

void CSCTrack::SetOffsetA (  int  layer, double  offset )  [inline]

Set the constant offset in the X direction. Parameters: layer  is the layer number, ranging from 0 - 3. offset  is the offset in microns.

void CSCTrack::SetOffsetB (  int  layer, double  offset )  [inline]

Set the Y-dependant offset in the X direction. Parameters: layer  is the layer number, ranging from 0 - 3. offset  is the offset in microns.

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

• CSCTrack.h

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