#include <KalmanVertexUpdator.h>

Inheritance diagram for Trk::KalmanVertexUpdator:

Collaboration diagram for Trk::KalmanVertexUpdator:

Public Types
enum	updateMode { removeTrack =-1, addTrack =1 }

Public Member Functions
virtual StatusCode	initialize () override

	KalmanVertexUpdator (const std::string &t, const std::string &n, const IInterface *p)
	Constructor. More...

	~KalmanVertexUpdator ()
	Destructor. More...

virtual xAOD::Vertex *	add (xAOD::Vertex &vtx, VxTrackAtVertex &trk) const override
	Method adding a single track to the vertex estimate. More...

virtual xAOD::Vertex *	remove (xAOD::Vertex &vtx, VxTrackAtVertex &trk) const override
	Method removing already added track from the vertex estimate. More...

virtual IVertexUpdator::positionUpdateOutcome	positionUpdate (const xAOD::Vertex &vtx, const LinearizedTrack *trk, double trackWeight, IVertexUpdator::updateMode mode) const override
	Position update method. More...

virtual float	trackParametersChi2 (const xAOD::Vertex &new_vtx, const LinearizedTrack *trk) const override
	Method calculating the interstep Chi2 increment. More...

virtual float	trackParametersChi2 (const IVertexUpdator::positionUpdateOutcome &new_vtx, const LinearizedTrack *trk) const override

virtual float	vertexPositionChi2 (const xAOD::Vertex &old_vtx, const xAOD::Vertex &new_vtx) const override
	Method calculating the vertex displacement-related part of the chi2 More...

virtual float	vertexPositionChi2 (const xAOD::Vertex &old_vtx, const IVertexUpdator::positionUpdateOutcome &new_vtx) const override

ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`. More...

const ServiceHandle< StoreGateSvc > &	evtStore () const
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`. More...

const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard `StoreGateSvc/DetectorStore` Returns (kind of) a pointer to the `StoreGateSvc`. More...

virtual StatusCode	sysInitialize () override
	Perform system initialization for an algorithm. More...

virtual StatusCode	sysStart () override
	Handle START transition. More...

virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles. More...

virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles. More...

Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T > &t)

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleKey &hndl, const std::string &doc, const SG::VarHandleKeyType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleBase &hndl, const std::string &doc, const SG::VarHandleType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, SG::VarHandleKeyArray &hndArr, const std::string &doc, const SG::VarHandleKeyArrayType &)

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, T &property, const std::string &doc, const SG::NotHandleType &)
	Declare a new Gaudi property. More...

Gaudi::Details::PropertyBase *	declareProperty (const std::string &name, T &property, const std::string &doc="none")
	Declare a new Gaudi property. More...

void	updateVHKA (Gaudi::Details::PropertyBase &)

MsgStream &	msg () const

MsgStream &	msg (const MSG::Level lvl) const

bool	msgLvl (const MSG::Level lvl) const

Static Public Member Functions
static const InterfaceID &	interfaceID ()
	AlgTool interface methods. More...

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution More...

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)

void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed. More...

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
xAOD::Vertex *	update (xAOD::Vertex &vtx, const VxTrackAtVertex &trk, IVertexUpdator::updateMode mode) const
	Method where the fit is actually done. More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleKeyArrayType &)
	specialization for handling Gaudi::Property<SG::VarHandleKeyArray> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &hndl, const SG::VarHandleType &)
	specialization for handling Gaudi::Property<SG::VarHandleBase> More...

Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T > &t, const SG::NotHandleType &)
	specialization for handling everything that's not a Gaudi::Property<SG::VarHandleKey> or a <SG::VarHandleKeyArray> More...

Static Private Member Functions
static float	trackParametersChi2 (const Amg::Vector3D &new_position, const LinearizedTrack *trk, const AmgSymMatrix(5) &trkParametersWeight)

static float	vertexPositionChi2 (const xAOD::Vertex &old_vtx, const Amg::Vector3D &new_position)

Private Attributes
StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default) More...

StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default) More...

std::vector< SG::VarHandleKeyArray * >	m_vhka

bool	m_varHandleArraysDeclared

Detailed Description

A concrete implementation of the Vertex Updator using the Kalman filter algorithm. The algorithm adds or removes a single track from the vertex estimate.

Based on R. Fruhwirth et al. Comp. Phys. Comm 96(1996) 189

Author: Kirill Prokofiev, November 2005

Changes:

David Shope david.nosp@m..ric.nosp@m.hard..nosp@m.shop.nosp@m.e@cer.nosp@m.n.ch (2016-04-19)

EDM Migration to xAOD - from Trk::VxCandidate to xAOD::Vertex, from Trk::RecVertex to xAOD::Vertex, from Trk::Vertex to Amg::Vector3D

Definition at line 36 of file KalmanVertexUpdator.h.

Member Typedef Documentation

◆ StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< AlgTool > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Member Enumeration Documentation

◆ updateMode

enum Trk::IVertexUpdator::updateMode

inherited

Enumerator
removeTrack
addTrack

Definition at line 68 of file IVertexUpdator.h.

                    {
           removeTrack=-1, 
           addTrack=1 
        } updateMode;

Constructor & Destructor Documentation

◆ KalmanVertexUpdator()

Trk::KalmanVertexUpdator::KalmanVertexUpdator	(	const std::string &	t,
		const std::string &	n,
		const IInterface *	p
	)

Constructor.

Definition at line 14 of file KalmanVertexUpdator.cxx.

                                                                                                      :
                                                                        AthAlgTool(t,n,p)
  {
   declareInterface<IVertexUpdator>(this);
  }

◆ ~KalmanVertexUpdator()

Trk::KalmanVertexUpdator::~KalmanVertexUpdator ( )

default

Destructor.

Member Function Documentation

◆ add()

xAOD::Vertex * Trk::KalmanVertexUpdator::add	(	xAOD::Vertex &	vtx,
		VxTrackAtVertex &	trk
	)		const

overridevirtual

Method adding a single track to the vertex estimate.

Implements Trk::IVertexUpdator.

Definition at line 36 of file KalmanVertexUpdator.cxx.

  {
    return update(vtx,trk,IVertexUpdator::addTrack);
  }

◆ declareGaudiProperty() [1/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleKeyArrayType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKeyArray>

Definition at line 170 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
  
   }

◆ declareGaudiProperty() [2/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleKeyType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
  
   }

◆ declareGaudiProperty() [3/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T > &	hndl,
		const SG::VarHandleType &
	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleBase>

Definition at line 184 of file AthCommonDataStore.h.

   {
     return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                        hndl.value(), 
                                                        hndl.documentation());
   }

◆ declareGaudiProperty() [4/4]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T > &	t,
		const SG::NotHandleType &
	)

inlineprivateinherited

specialization for handling everything that's not a Gaudi::Property<SG::VarHandleKey> or a <SG::VarHandleKeyArray>

Definition at line 199 of file AthCommonDataStore.h.

   {
     return PBASE::declareProperty(t);
   }

◆ declareProperty() [1/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty	(	const std::string &	name,
		SG::VarHandleBase &	hndl,
		const std::string &	doc,
		const SG::VarHandleType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
hndl	Object holding the property value.
doc	Documentation string for the property.

This is the version for types that derive from SG::VarHandleBase. The property value object is put on the input and output lists as appropriate; then we forward to the base class.

Definition at line 245 of file AthCommonDataStore.h.

   {
     this->declare(hndl.vhKey());
     hndl.vhKey().setOwner(this);
  
     return PBASE::declareProperty(name,hndl,doc);
   }

◆ declareProperty() [2/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty	(	const std::string &	name,
		SG::VarHandleKey &	hndl,
		const std::string &	doc,
		const SG::VarHandleKeyType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
hndl	Object holding the property value.
doc	Documentation string for the property.

This is the version for types that derive from SG::VarHandleKey. The property value object is put on the input and output lists as appropriate; then we forward to the base class.

Definition at line 221 of file AthCommonDataStore.h.

   {
     this->declare(hndl);
     hndl.setOwner(this);
  
     return PBASE::declareProperty(name,hndl,doc);
   }

◆ declareProperty() [3/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty	(	const std::string &	name,
		SG::VarHandleKeyArray &	hndArr,
		const std::string &	doc,
		const SG::VarHandleKeyArrayType &
	)

inlineinherited

Definition at line 259 of file AthCommonDataStore.h.

   {
  
     // std::ostringstream ost;
     // ost << Algorithm::name() << " VHKA declareProp: " << name 
     //     << " size: " << hndArr.keys().size() 
     //     << " mode: " << hndArr.mode() 
     //     << "  vhka size: " << m_vhka.size()
     //     << "\n";
     // debug() << ost.str() << endmsg;
  
     hndArr.setOwner(this);
     m_vhka.push_back(&hndArr);
  
     Gaudi::Details::PropertyBase* p =  PBASE::declareProperty(name, hndArr, doc);
     if (p != 0) {
       p->declareUpdateHandler(&AthCommonDataStore<PBASE>::updateVHKA, this);
     } else {
       ATH_MSG_ERROR("unable to call declareProperty on VarHandleKeyArray " 
                     << name);
     }
  
     return p;
  
   }

◆ declareProperty() [4/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty	(	const std::string &	name,
		T &	property,
		const std::string &	doc,
		const SG::NotHandleType &
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
property	Object holding the property value.
doc	Documentation string for the property.

This is the generic version, for types that do not derive from SG::VarHandleKey. It just forwards to the base class version of declareProperty.

Definition at line 333 of file AthCommonDataStore.h.

   {
     return PBASE::declareProperty(name, property, doc);
   }

◆ declareProperty() [5/6]

Gaudi::Details::PropertyBase* AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty	(	const std::string &	name,
		T &	property,
		const std::string &	doc = `"none"`
	)

inlineinherited

Declare a new Gaudi property.

Parameters

name	Name of the property.
property	Object holding the property value.
doc	Documentation string for the property.

This dispatches to either the generic declareProperty or the one for VarHandle/Key/KeyArray.

Definition at line 352 of file AthCommonDataStore.h.

   {
     typedef typename SG::HandleClassifier<T>::type htype;
     return declareProperty (name, property, doc, htype());
   }

◆ declareProperty() [6/6]

Gaudi::Details::PropertyBase& AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty ( Gaudi::Property< T > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                  {
     typedef typename SG::HandleClassifier<T>::type htype;
     return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
   }

◆ detStore()

const ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< AlgTool > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

95 { return m_detStore; }

◆ evtStore() [1/2]

ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< AlgTool > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

85 { return m_evtStore; }

◆ evtStore() [2/2]

const ServiceHandle<StoreGateSvc>& AthCommonDataStore< AthCommonMsg< AlgTool > >::evtStore ( ) const

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 90 of file AthCommonDataStore.h.

90 { return m_evtStore; }

◆ extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

◆ initialize()

StatusCode Trk::KalmanVertexUpdator::initialize ( )

overridevirtual

Definition at line 23 of file KalmanVertexUpdator.cxx.

  {
   StatusCode sc = AlgTool::initialize();
   if(sc.isFailure())
   {
    msg(MSG::ERROR)<<" Unable to initialize the AlgTool"<<endmsg;
    return StatusCode::FAILURE;
   }
   
   return StatusCode::SUCCESS;
  }

◆ inputHandles()

virtual std::vector<Gaudi::DataHandle*> AthCommonDataStore< AthCommonMsg< AlgTool > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ interfaceID()

static const InterfaceID& Trk::IVertexUpdator::interfaceID ( )

inlinestaticinherited

AlgTool interface methods.

Definition at line 56 of file IVertexUpdator.h.

56 { return IID_IVertexUpdator; };

◆ msg() [1/2]

MsgStream& AthCommonMsg< AlgTool >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                 {
     return this->msgStream();
   }

◆ msg() [2/2]

MsgStream& AthCommonMsg< AlgTool >::msg ( const MSG::Level lvl ) const

inlineinherited

Definition at line 27 of file AthCommonMsg.h.

                                                   {
     return this->msgStream(lvl);
   }

◆ msgLvl()

bool AthCommonMsg< AlgTool >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                                {
     return this->msgLevel(lvl);
   }

◆ outputHandles()

virtual std::vector<Gaudi::DataHandle*> AthCommonDataStore< AthCommonMsg< AlgTool > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ positionUpdate()

IVertexUpdator::positionUpdateOutcome Trk::KalmanVertexUpdator::positionUpdate	(	const xAOD::Vertex &	vtx,
		const LinearizedTrack *	trk,
		double	trackWeight,
		IVertexUpdator::updateMode	mode
	)		const

overridevirtual

Position update method.

The 'mode' parameter is used to indicate whether we want to add or remove a track.

Implements Trk::IVertexUpdator.

Definition at line 126 of file KalmanVertexUpdator.cxx.

  {
    // linearized track information
    const AmgMatrix(5,3)& A = trk->positionJacobian();
    const AmgMatrix(5,3)& B = trk->momentumJacobian();
    const AmgVector(5) & trackParameters = trk->expectedParametersAtPCA();
    const AmgVector(5) & constantTerm = trk->constantTerm();
    const AmgSymMatrix(5) & trackParametersWeight  = trk->expectedWeightAtPCA();
  
    int sign = (mode == IVertexUpdator::addTrack ? 1 : -1); 
  
    //vertex to be updated
    const Amg::Vector3D & old_pos = vtx.position();
    const AmgSymMatrix(3)& old_vrt_weight = vtx.covariancePosition().inverse();
    ATH_MSG_VERBOSE ("Old vertex weight " << old_vrt_weight);
  
    //making the intermediate quantities:
    //W_k = (B^T*G*B)^(-1)
  
    AmgSymMatrix(3) S = B.transpose()*(trackParametersWeight*B);
    S = S.inverse().eval();
  
    //G_b = G_k - G_k*B_k*W_k*B_k^(T)*G_k
    AmgSymMatrix(5) gB = trackParametersWeight - trackParametersWeight*(B*(S*B.transpose()))*trackParametersWeight.transpose();
  
    //new vertex weight matrix
    AmgSymMatrix(3) new_vrt_weight_later_cov = old_vrt_weight + trackWeight * sign * A.transpose()*(gB*A);
    
    new_vrt_weight_later_cov = new_vrt_weight_later_cov.inverse().eval();
  
    //new vertex position
    Amg::Vector3D new_vrt_position =  new_vrt_weight_later_cov*(old_vrt_weight * old_pos + trackWeight * sign * A.transpose() * gB *(trackParameters - constantTerm) );
  
    return IVertexUpdator::positionUpdateOutcome{new_vrt_position, new_vrt_weight_later_cov,trackParametersWeight}; 
  }//end of position update method

◆ remove()

xAOD::Vertex * Trk::KalmanVertexUpdator::remove	(	xAOD::Vertex &	vtx,
		VxTrackAtVertex &	trk
	)		const

overridevirtual

Method removing already added track from the vertex estimate.

Implements Trk::IVertexUpdator.

Definition at line 42 of file KalmanVertexUpdator.cxx.

  {
   return update(vtx,trk,IVertexUpdator::removeTrack);
  }

◆ renounce()

std::enable_if_t<std::is_void_v<std::result_of_t<decltype(&T::renounce)(T)> > && !std::is_base_of_v<SG::VarHandleKeyArray, T> && std::is_base_of_v<Gaudi::DataHandle, T>, void> AthCommonDataStore< AthCommonMsg< AlgTool > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

   {
     h.renounce();
     PBASE::renounce (h);
   }

◆ renounceArray()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                           {
     handlesArray.renounce();
   }

◆ sysInitialize()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysInitialize ( )

overridevirtualinherited

Perform system initialization for an algorithm.

We override this to declare all the elements of handle key arrays at the end of initialization. See comments on updateVHKA.

Reimplemented in DerivationFramework::CfAthAlgTool, AthCheckedComponent< AthAlgTool >, AthCheckedComponent<::AthAlgTool >, and asg::AsgMetadataTool.

◆ sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

◆ trackParametersChi2() [1/3]

float Trk::KalmanVertexUpdator::trackParametersChi2	(	const Amg::Vector3D &	new_position,
		const LinearizedTrack *	trk,
		const AmgSymMatrix(5) &	trkParametersWeight
	)

staticprivate

Definition at line 175 of file KalmanVertexUpdator.cxx.

                                                                                                                                                          {
  
    // track information
      const AmgMatrix(5,3)& A = trk->positionJacobian();
      const AmgMatrix(5,3) & B = trk->momentumJacobian();
      const AmgVector(5) & trkParameters = trk->expectedParametersAtPCA();
  
    //calculation of S matrix
      AmgSymMatrix(3) Sm = B.transpose()*(trkParametersWeight*B);
      AmgSymMatrix(3)   Sm_inverse;
      bool invertible;
      Sm.computeInverseWithCheck(Sm_inverse,invertible);
      if(!invertible) {
        return -999.;
      }
      Sm= Sm_inverse.eval();
  
      const AmgVector(5)& theResidual = trk->constantTerm();
  
    //refitted track momentum
      Amg::Vector3D newTrackMomentum = Sm*B.transpose()*trkParametersWeight*(trkParameters - theResidual - A*new_position);
  
    //refitted track parameters
      AmgVector(5) refTrackParameters = theResidual + A * new_position + B * newTrackMomentum;
  
    //parameters difference
      AmgVector(5) paramDifference = trkParameters - refTrackParameters;
  
      return paramDifference.transpose() * ( trkParametersWeight * paramDifference );;
  
  }

◆ trackParametersChi2() [2/3]

float Trk::KalmanVertexUpdator::trackParametersChi2	(	const IVertexUpdator::positionUpdateOutcome &	new_vtx,
		const LinearizedTrack *	trk
	)		const

overridevirtual

Implements Trk::IVertexUpdator.

Definition at line 212 of file KalmanVertexUpdator.cxx.

                                                                                                                                      {
     return trackParametersChi2(new_vtx.position, trk, new_vtx.trkParametersWeight); 
  }//end of chi2 increment method

◆ trackParametersChi2() [3/3]

float Trk::KalmanVertexUpdator::trackParametersChi2	(	const xAOD::Vertex &	new_vtx,
		const LinearizedTrack *	trk
	)		const

overridevirtual

Method calculating the interstep Chi2 increment.

Implements Trk::IVertexUpdator.

Definition at line 164 of file KalmanVertexUpdator.cxx.

  {
     return trackParametersChi2(new_vtx.position(), trk, trk->expectedWeightAtPCA()); 
  }//end of chi2 increment method

◆ update()

xAOD::Vertex * Trk::KalmanVertexUpdator::update	(	xAOD::Vertex &	vtx,
		const VxTrackAtVertex &	trk,
		IVertexUpdator::updateMode	mode
	)		const

private

Method where the fit is actually done.

Definition at line 48 of file KalmanVertexUpdator.cxx.

  {
  
    //getting tracks at vertex
    std::vector<Trk::VxTrackAtVertex> & tracksAtVertex = vtx.vxTrackAtVertex();
  
    //in case one wants to remove the track, one should be sure that this track
    //is already fitted to the vertex
    auto righttrack = std::find(tracksAtVertex.begin(), tracksAtVertex.end(), trk); 
    // if it is not part of the vertex (which includes a possible empty vertex), we either add it or give up
    // in case we are removing tracks
    if (righttrack == tracksAtVertex.end())
    {
      ATH_MSG_VERBOSE ("The track requested for removal or adding is not found in the vector of tracks");
      // removal - can not proceed
      if (mode == IVertexUpdator::removeTrack) {
        ATH_MSG_ERROR ("During remove track has to be already attached to the vertex");
        msg(MSG::ERROR)  << "The copy of initial xAOD::Vertex returned" << endmsg;
        return &vtx;
      }
      // addition - here this is expected behaviour 
      
        righttrack = tracksAtVertex.insert(tracksAtVertex.end(),trk); 
        ATH_MSG_VERBOSE ("Updating vertex with new track which is still not attached to vertex. Adding it before updating...");
      
    }
  
    //all safe, call the position update
    // chi and ndf
    // track weight and old vertex
  
    double trkWeight = trk.weight();
  
    AmgSymMatrix(3)   vrt_inverse;
    bool invertible;
    vtx.covariancePosition().computeInverseWithCheck(vrt_inverse,invertible);
  
    if(!invertible) {
      ATH_MSG_VERBOSE ("The vertex's cov is not invertible, quit updating.");
      return &vtx;
    }
    const IVertexUpdator::positionUpdateOutcome & fit_vrt = positionUpdate( vtx, trk.linState(), trkWeight, mode);
  
    double chi2 = vtx.chiSquared();
    double trk_chi = trackParametersChi2( fit_vrt, trk.linState() );
    if(trk_chi==-999.){
      ATH_MSG_VERBOSE ("The track's cov is not invertible, quit updating.");
      return &vtx;
    }
  
    const int sign = (mode == IVertexUpdator::addTrack ? 1 : -1); 
    chi2 += sign * (vertexPositionChi2(vtx, fit_vrt) + trkWeight * trk_chi);
  
    //number of degrees of freedom
    double ndf = vtx.numberDoF();
    ndf +=  sign * trkWeight * (2.0);
  
    //forming a final xAOD::Vertex
    vtx.setPosition( fit_vrt.position );
    vtx.setCovariancePosition( fit_vrt.covariancePosition );
    vtx.setFitQuality( chi2, ndf );
  
    //playing with vector of fitted tracks and compatibility
    if( mode == IVertexUpdator::addTrack )
    {
      //changes towards fit quality
      righttrack->setWeight( trkWeight );
      righttrack->setTrackQuality( Trk::FitQuality(trk_chi, 2 * trkWeight) );
    }
    else
    {
      tracksAtVertex.erase( righttrack );
    }
  
    return &vtx;
  }//end of update method

◆ updateVHKA()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                                {
     // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
     //         << "  size: " << m_vhka.size() << endmsg;
     for (auto &a : m_vhka) {
       std::vector<SG::VarHandleKey*> keys = a->keys();
       for (auto k : keys) {
         k->setOwner(this);
       }
     }
   }

◆ vertexPositionChi2() [1/3]

float Trk::KalmanVertexUpdator::vertexPositionChi2	(	const xAOD::Vertex &	old_vtx,
		const Amg::Vector3D &	new_position
	)

staticprivate

Definition at line 206 of file KalmanVertexUpdator.cxx.

                                                                                                           {
      AmgSymMatrix(3)  old_wrt_weight = old_vtx.covariancePosition().inverse();
      Amg::Vector3D posDifference = new_position - old_vtx.position();
      return posDifference.transpose()*(old_wrt_weight*posDifference);
  }

◆ vertexPositionChi2() [2/3]

float Trk::KalmanVertexUpdator::vertexPositionChi2	(	const xAOD::Vertex &	old_vtx,
		const IVertexUpdator::positionUpdateOutcome &	new_vtx
	)		const

overridevirtual

Implements Trk::IVertexUpdator.

Definition at line 216 of file KalmanVertexUpdator.cxx.

                                                                                                                                   {
     return vertexPositionChi2(old_vtx, new_vtx.position); 
  }//end of vertex position chi2

◆ vertexPositionChi2() [3/3]

float Trk::KalmanVertexUpdator::vertexPositionChi2	(	const xAOD::Vertex &	old_vtx,
		const xAOD::Vertex &	new_vtx
	)		const

overridevirtual

Method calculating the vertex displacement-related part of the chi2

Implements Trk::IVertexUpdator.

Definition at line 169 of file KalmanVertexUpdator.cxx.

  {
     return vertexPositionChi2(old_vtx, new_vtx.position());
  }//end of vertex position chi2

Member Data Documentation

◆ m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default)

Definition at line 393 of file AthCommonDataStore.h.

◆ m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default)

Definition at line 390 of file AthCommonDataStore.h.

◆ m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< AlgTool > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

◆ m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< AlgTool > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

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

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ StoreGateSvc_t

Member Enumeration Documentation

◆ updateMode

Constructor & Destructor Documentation

◆ KalmanVertexUpdator()

◆ ~KalmanVertexUpdator()

Member Function Documentation

◆ add()

◆ declareGaudiProperty() [1/4]

◆ declareGaudiProperty() [2/4]

◆ declareGaudiProperty() [3/4]

◆ declareGaudiProperty() [4/4]

◆ declareProperty() [1/6]

◆ declareProperty() [2/6]

◆ declareProperty() [3/6]

◆ declareProperty() [4/6]

◆ declareProperty() [5/6]

◆ declareProperty() [6/6]

◆ detStore()

◆ evtStore() [1/2]

◆ evtStore() [2/2]

◆ extraDeps_update_handler()

◆ initialize()

◆ inputHandles()

◆ interfaceID()

◆ msg() [1/2]

◆ msg() [2/2]

◆ msgLvl()

◆ outputHandles()

◆ positionUpdate()

◆ remove()

◆ renounce()

◆ renounceArray()

◆ sysInitialize()

◆ sysStart()

◆ trackParametersChi2() [1/3]

◆ trackParametersChi2() [2/3]

◆ trackParametersChi2() [3/3]

◆ update()

◆ updateVHKA()

◆ vertexPositionChi2() [1/3]

◆ vertexPositionChi2() [2/3]

◆ vertexPositionChi2() [3/3]

Member Data Documentation

◆ m_detStore

◆ m_evtStore

◆ m_varHandleArraysDeclared

◆ m_vhka