cbm::bba::AlignmentBody Class Reference

alignment body accessor and property handler More...

#include <CbmBbaAlignmentBody.h>

Public Member Functions
	AlignmentBody ()=default
	Default constructor.
	AlignmentBody (double shiftX, double shiftY, double shiftZ, double rotX, double rotY, double rotZ)
	Constructor with individual parameters for alignment bodies not associated with a geo node (no pre-existing alignment possible)
	AlignmentBody (const std::string nodePath)
	Constructor.
	~AlignmentBody ()=default
	Destructor.
bool	IsValid () const
bool	CreateFromGeoNode (const std::string nodePath)
void	ActivateParameters (const std::array< bool, NofParameters > &isParActive)
bool	IsParameterActive (int i) const
void	SetParameters (double shiftX=0., double shiftY=0., double shiftZ=0., double rotX=0., double rotY=0., double rotZ=0.)
const std::string &	GetNodePath () const
	Get the full path to the node in the ROOT geometry.
const TGeoHMatrix &	GetGlobalTransform () const
	Get the transformation of the aligment body to the glaobal coordinates.
std::array< double, 3 >	ApplyAlignmentToHit (const std::array< double, 3 > hit) const
	Apply the alignment to hit: return = fHitTransform * hit.
std::array< double, 3 >	ApplyInverseAlignmentToHit (const std::array< double, 3 > hit) const
	Apply the inverse alignment to hit: return = fHitTransform^{-1} * hit.
const std::array< double, NofParameters > &	GetParameters () const
	Get the alignment parameters.
void	GetParameters (double *par) const
const std::array< double, NofParameters > &	GetInitialParameters () const
	Get the initial alignment parameters.
const TGeoHMatrix &	GetAlignmentMatrix () const
	Get the transformation matrix of the alignment body.
const TGeoHMatrix &	GetHitTransform () const
	Get the transformation of the initially aligned {x,y,z} to the newly aligned {x,y,z} in the global coordinates.
void	SetStatistics (long statistics)
	Set the statistics for the alignment body.
void	IncrementStatistics (int increment)
	Increment the statistics for the alignment body.
long	GetStatistics () const
	Get the statistics for the alignment body.
int	GetTrackingStation () const
	Get the Tracking Station index.
void	SetTrackingStation (int station)
	Set the Tracking Station index.

Static Public Attributes
static constexpr int	NofParameters = 6
	number of alignment parameters

Private Member Functions
	ClassDefNV (AlignmentBody, 0)

Private Attributes
int	fTrackingStation {-1}
bool	fIsValid {false}
	flag indicating if the alignment body is valid
std::string	fNodePath {}
	full path to the node in the root geometry
std::array< double, NofParameters >	fPar {0.}
	alignment parameters: shiftX, shiftY, shiftZ, rotX, rotY, rotZ
std::array< bool, NofParameters >	fIsParActive {false}
	flags for the parameters to be aligned
std::array< double, NofParameters >	fPar0 {0.}
	initial alignment parameters
TGeoHMatrix	fAlignment
	transformation matrix of the alignment body. Corresponds to the fPar values.
TGeoHMatrix	fGlobal
	global transformation matrix of the alignment body
TGeoHMatrix	fGlobalInv
	inverse of the global transformation matrix
TGeoHMatrix	fGlobalNominal
	nominal global transformation matrix, without (pre-)alignment
TGeoHMatrix	fHitTransform
long	fStatistics {0}
	additional information

Detailed Description

alignment body accessor and property handler

it represents one TGeoNode in the ROOT geometry

The alignment body is a class that represents an alignable component of the detector. It contains the transformation matrices and manages the transformation of the hits associated with the alignment body. There are six alignment parameters:

• shiftX, shiftY, shiftZ [cm]: translations in the X, Y, and Z directions
• rotX, rotY, rotZ [grad]: extrinsic rotations around the X, Y, and Z axes

The position and orientation of the alignment body in the global coordinate system is defined by a global transformation matrix fGlobal. The alignment correction itself is represented by the matrix fAlignment, which is constructed from the alignment parameters.

To transform initially aligned {x,y,z} hits to the newly aligned {x,y,z} in global coordinates, the transformation

is defined as:

where:

• 

  is the nominal global transformation of the node (without pre-existing alignment)

• 

  is the new alignment (replacing

  

  )

• 

  is the initial pre-alignment of the node

The matices GlobalNominal and A0 are calculated from the ROOT geometry as follows: The local to global transformation

for the geo node is defined as:

where:

• GlobalMother is the sequence of transformations upstream the node in the ROOT geometry
• LocalNominal is the default node transformation matrix (w/o alignment)

Definition at line 47 of file CbmBbaAlignmentBody.h.

Constructor & Destructor Documentation

AlignmentBody() [1/3]

cbm::bba::AlignmentBody::AlignmentBody ( )

default

Default constructor.

Referenced by ClassDefNV().

AlignmentBody() [2/3]

cbm::bba::AlignmentBody::AlignmentBody ( double shiftX, double shiftY, double shiftZ, double rotX, double rotY, double rotZ )

explicit

Constructor with individual parameters for alignment bodies not associated with a geo node (no pre-existing alignment possible)

Parameters

six	individual parameters: shiftX, shiftY, shiftZ, rotX, rotY, rotZ

Definition at line 31 of file CbmBbaAlignmentBody.cxx.

References fAlignment, fGlobal, fGlobalInv, fGlobalNominal, fHitTransform, and fIsValid.

AlignmentBody() [3/3]

cbm::bba::AlignmentBody::AlignmentBody

(

const std::string

nodePath

)

Constructor.

Parameters

nodePath

full path to the node in the ROOT geometry

Definition at line 59 of file CbmBbaAlignmentBody.cxx.

References CreateFromGeoNode().

~AlignmentBody()

cbm::bba::AlignmentBody::~AlignmentBody ( )

default

Destructor.

Member Function Documentation

ActivateParameters()

void cbm::bba::AlignmentBody::ActivateParameters

(

const std::array< bool, NofParameters > &

isParActive

)

Definition at line 148 of file CbmBbaAlignmentBody.cxx.

References fIsParActive.

ApplyAlignmentToHit()

std::array< double, 3 > cbm::bba::AlignmentBody::ApplyAlignmentToHit

(

const std::array< double, 3 >

hit

)

const

Apply the alignment to hit: return = fHitTransform * hit.

Definition at line 177 of file CbmBbaAlignmentBody.cxx.

References fHitTransform.

ApplyInverseAlignmentToHit()

std::array< double, 3 > cbm::bba::AlignmentBody::ApplyInverseAlignmentToHit

(

const std::array< double, 3 >

hit

)

const

Apply the inverse alignment to hit: return = fHitTransform^{-1} * hit.

Definition at line 186 of file CbmBbaAlignmentBody.cxx.

References fHitTransform.

ClassDefNV()

cbm::bba::AlignmentBody::ClassDefNV ( AlignmentBody , 0  )

private

References AlignmentBody().

CreateFromGeoNode()

bool cbm::bba::AlignmentBody::CreateFromGeoNode

(

const std::string

nodePath

)

Definition at line 61 of file CbmBbaAlignmentBody.cxx.

References fAlignment, fGlobal, fGlobalInv, fGlobalNominal, fHitTransform, fIsValid, and fNodePath.

Referenced by AlignmentBody().

GetAlignmentMatrix()

const TGeoHMatrix & cbm::bba::AlignmentBody::GetAlignmentMatrix ( ) const

inline

Get the transformation matrix of the alignment body.

Definition at line 96 of file CbmBbaAlignmentBody.h.

References fAlignment.

GetGlobalTransform()

const TGeoHMatrix & cbm::bba::AlignmentBody::GetGlobalTransform ( ) const

inline

Get the transformation of the aligment body to the glaobal coordinates.

Definition at line 79 of file CbmBbaAlignmentBody.h.

References fGlobal.

GetHitTransform()

const TGeoHMatrix & cbm::bba::AlignmentBody::GetHitTransform ( ) const

inline

Get the transformation of the initially aligned {x,y,z} to the newly aligned {x,y,z} in the global coordinates.

Definition at line 100 of file CbmBbaAlignmentBody.h.

References fHitTransform.

GetInitialParameters()

const std::array< double, NofParameters > & cbm::bba::AlignmentBody::GetInitialParameters ( ) const

inline

Get the initial alignment parameters.

Definition at line 93 of file CbmBbaAlignmentBody.h.

References fPar0.

GetNodePath()

const std::string & cbm::bba::AlignmentBody::GetNodePath ( ) const

inline

Get the full path to the node in the ROOT geometry.

Definition at line 76 of file CbmBbaAlignmentBody.h.

References fNodePath.

GetParameters() [1/2]

const std::array< double, NofParameters > & cbm::bba::AlignmentBody::GetParameters ( ) const

inline

Get the alignment parameters.

Definition at line 88 of file CbmBbaAlignmentBody.h.

References fPar.

GetParameters() [2/2]

void cbm::bba::AlignmentBody::GetParameters

(

double *

par

)

const

Definition at line 196 of file CbmBbaAlignmentBody.cxx.

References fPar, and NofParameters.

GetStatistics()

long cbm::bba::AlignmentBody::GetStatistics ( ) const

inline

Get the statistics for the alignment body.

Definition at line 109 of file CbmBbaAlignmentBody.h.

References fStatistics.

GetTrackingStation()

int cbm::bba::AlignmentBody::GetTrackingStation ( ) const

inline

Get the Tracking Station index.

Definition at line 112 of file CbmBbaAlignmentBody.h.

References fTrackingStation.

IncrementStatistics()

void cbm::bba::AlignmentBody::IncrementStatistics ( int increment )

inline

Increment the statistics for the alignment body.

Definition at line 106 of file CbmBbaAlignmentBody.h.

References fStatistics.

IsParameterActive()

bool cbm::bba::AlignmentBody::IsParameterActive ( int i ) const

inline

Definition at line 70 of file CbmBbaAlignmentBody.h.

References fIsParActive.

IsValid()

bool cbm::bba::AlignmentBody::IsValid ( ) const

inline

Definition at line 64 of file CbmBbaAlignmentBody.h.

References fIsValid.

SetParameters()

void cbm::bba::AlignmentBody::SetParameters	(	double	shiftX = 0.,
		double	shiftY = 0.,
		double	shiftZ = 0.,
		double	rotX = 0.,
		double	rotY = 0.,
		double	rotZ = 0. )

Definition at line 154 of file CbmBbaAlignmentBody.cxx.

References fAlignment, fGlobalInv, fGlobalNominal, fHitTransform, and fPar.

SetStatistics()

void cbm::bba::AlignmentBody::SetStatistics ( long statistics )

inline

Set the statistics for the alignment body.

Definition at line 103 of file CbmBbaAlignmentBody.h.

References fStatistics.

SetTrackingStation()

void cbm::bba::AlignmentBody::SetTrackingStation ( int station )

inline

Set the Tracking Station index.

Definition at line 115 of file CbmBbaAlignmentBody.h.

References fTrackingStation.

Member Data Documentation

fAlignment

TGeoHMatrix cbm::bba::AlignmentBody::fAlignment

private

transformation matrix of the alignment body. Corresponds to the fPar values.

Definition at line 131 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), CreateFromGeoNode(), GetAlignmentMatrix(), and SetParameters().

fGlobal

TGeoHMatrix cbm::bba::AlignmentBody::fGlobal

private

global transformation matrix of the alignment body

Definition at line 133 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), CreateFromGeoNode(), and GetGlobalTransform().

fGlobalInv

TGeoHMatrix cbm::bba::AlignmentBody::fGlobalInv

private

inverse of the global transformation matrix

Definition at line 134 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), CreateFromGeoNode(), and SetParameters().

fGlobalNominal

TGeoHMatrix cbm::bba::AlignmentBody::fGlobalNominal

private

nominal global transformation matrix, without (pre-)alignment

Definition at line 135 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), CreateFromGeoNode(), and SetParameters().

fHitTransform

TGeoHMatrix cbm::bba::AlignmentBody::fHitTransform

private

transformation of the global hit {x,y,z} to the newly aligned {x,y,z} in global coordinates fGlobalTransform * fAlignment * (fGlobalTransform)^{-1} TODO

Definition at line 137 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), ApplyAlignmentToHit(), ApplyInverseAlignmentToHit(), CreateFromGeoNode(), GetHitTransform(), and SetParameters().

fIsParActive

std::array<bool, NofParameters> cbm::bba::AlignmentBody::fIsParActive {false}

private

flags for the parameters to be aligned

Definition at line 126 of file CbmBbaAlignmentBody.h.

Referenced by ActivateParameters(), and IsParameterActive().

fIsValid

bool cbm::bba::AlignmentBody::fIsValid {false}

private

flag indicating if the alignment body is valid

Definition at line 120 of file CbmBbaAlignmentBody.h.

Referenced by AlignmentBody(), CreateFromGeoNode(), and IsValid().

fNodePath

std::string cbm::bba::AlignmentBody::fNodePath {}

private

full path to the node in the root geometry

Definition at line 122 of file CbmBbaAlignmentBody.h.

Referenced by CreateFromGeoNode(), and GetNodePath().

fPar

std::array<double, NofParameters> cbm::bba::AlignmentBody::fPar {0.}

private

alignment parameters: shiftX, shiftY, shiftZ, rotX, rotY, rotZ

Definition at line 124 of file CbmBbaAlignmentBody.h.

Referenced by GetParameters(), GetParameters(), and SetParameters().

fPar0

std::array<double, NofParameters> cbm::bba::AlignmentBody::fPar0 {0.}

private

initial alignment parameters

Definition at line 129 of file CbmBbaAlignmentBody.h.

Referenced by GetInitialParameters().

fStatistics

long cbm::bba::AlignmentBody::fStatistics {0}

private

additional information

statistics for the alignment body

Definition at line 143 of file CbmBbaAlignmentBody.h.

Referenced by GetStatistics(), IncrementStatistics(), and SetStatistics().

fTrackingStation

int cbm::bba::AlignmentBody::fTrackingStation {-1}

private

Definition at line 119 of file CbmBbaAlignmentBody.h.

Referenced by GetTrackingStation(), and SetTrackingStation().

NofParameters

int cbm::bba::AlignmentBody::NofParameters = 6

staticconstexpr

number of alignment parameters

Definition at line 62 of file CbmBbaAlignmentBody.h.

Referenced by GetParameters().

---

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

• CbmBbaAlignmentBody.h
• CbmBbaAlignmentBody.cxx