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AliRoot » STEER » STEER » AliTrackFitterRieman

class AliTrackFitterRieman: public AliTrackFitter


 Class to the track points on the Riemann sphere. Inputs are
 the set of id's (volids) of the volumes in which residuals are
 calculated to construct a chi2 function to be minimized during
 the alignment procedures. For the moment the track extrapolation is
 taken at the space-point reference plane. The reference plane is
 found using the covariance matrix of the point
 (assuming sigma(x)=0 at the reference coordinate system.

 Internal usage of AliRieman class for minimization

Function Members (Methods)

public:

	AliTrackFitterRieman()
	AliTrackFitterRieman(const AliTrackFitterRieman& rieman)
	AliTrackFitterRieman(AliTrackPointArray* array, Bool_t owner = kTRUE)
virtual	~AliTrackFitterRieman()
void	TObject::AbstractMethod(const char* method) const
void	AddPoint(Float_t x, Float_t y, Float_t z, Float_t sy, Float_t sz)
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
static TClass*	Class()
virtual const char*	TObject::ClassName() const
virtual void	TObject::Clear(Option_t* = "")
virtual TObject*	TObject::Clone(const char* newname = "") const
virtual Int_t	TObject::Compare(const TObject* obj) const
virtual void	TObject::Copy(TObject& object) const
virtual void	TObject::Delete(Option_t* option = "")MENU
virtual Int_t	TObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual void	TObject::Draw(Option_t* option = "")
virtual void	TObject::DrawClass() constMENU
virtual TObject*	TObject::DrawClone(Option_t* option = "") constMENU
virtual void	TObject::Dump() constMENU
virtual void	TObject::Error(const char* method, const char* msgfmt) const
virtual void	TObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual void	TObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual void	TObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual void	TObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*	TObject::FindObject(const char* name) const
virtual TObject*	TObject::FindObject(const TObject* obj) const
Bool_t	AliTrackFitter::FindVolId(const TArrayI* array, UShort_t volid) const
virtual Bool_t	Fit(const TArrayI* volIds, const TArrayI* volIdsFit = 0x0, AliGeomManager::ELayerID layerRangeMin = AliGeomManager::kFirstLayer, AliGeomManager::ELayerID layerRangeMax = AliGeomManager::kLastLayer)
Double_t	GetAlpha() const
Double_t	GetC() const
Float_t	AliTrackFitter::GetChi2() const
Bool_t	GetCorrection() const
const TMatrixDSym&	AliTrackFitter::GetCovariance() const
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
Double_t	GetDYat(Double_t x) const
Double_t	GetDZat(Double_t x) const
Double_t	GetErrY2at(Double_t x) const
Double_t	GetErrZ2at(Double_t x) const
virtual const char*	TObject::GetIconName() const
Float_t	GetMaxDelta() const
Double_t	GetMaxPointRadius() const
Int_t	AliTrackFitter::GetMinNPoints() const
Double_t	GetMinPointRadius() const
virtual const char*	TObject::GetName() const
Int_t	AliTrackFitter::GetNdf() const
Float_t	AliTrackFitter::GetNormChi2() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
const Double_t*	AliTrackFitter::GetParam() const
virtual Bool_t	GetPCA(const AliTrackPoint& p, AliTrackPoint& p2) const
AliRieman*	GetRieman() const
virtual const char*	TObject::GetTitle() const
void	AliTrackFitter::GetTrackResiduals(AliTrackPointArray& pVolId, AliTrackPointArray& pTrack) const
virtual UInt_t	TObject::GetUniqueID() const
const Float_t*	AliTrackFitter::GetX() const
Bool_t	GetXYZat(Double_t r, Float_t* xyz) const
const Float_t*	AliTrackFitter::GetY() const
Double_t	GetYat(Double_t x) const
const Float_t*	AliTrackFitter::GetZ() const
Double_t	GetZat(Double_t x) const
virtual Bool_t	TObject::HandleTimer(TTimer* timer)
virtual ULong_t	TObject::Hash() const
virtual void	TObject::Info(const char* method, const char* msgfmt) const
virtual Bool_t	TObject::InheritsFrom(const char* classname) const
virtual Bool_t	TObject::InheritsFrom(const TClass* cl) const
virtual void	TObject::Inspect() constMENU
void	TObject::InvertBit(UInt_t f)
virtual TClass*	IsA() const
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	TObject::IsSortable() const
Bool_t	TObject::IsZombie() const
virtual void	TObject::ls(Option_t* option = "") const
void	TObject::MayNotUse(const char* method) const
virtual Bool_t	TObject::Notify()
void	TObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
static void	TObject::operator delete(void* ptr)
static void	TObject::operator delete(void* ptr, void* vp)
static void	TObject::operator delete[](void* ptr)
static void	TObject::operator delete[](void* ptr, void* vp)
void*	TObject::operator new(size_t sz)
void*	TObject::operator new(size_t sz, void* vp)
void*	TObject::operator new[](size_t sz)
void*	TObject::operator new[](size_t sz, void* vp)
AliTrackFitterRieman&	operator=(const AliTrackFitterRieman& rieman)
virtual void	TObject::Paint(Option_t* option = "")
virtual void	TObject::Pop()
virtual void	TObject::Print(Option_t* option = "") const
virtual Int_t	TObject::Read(const char* name)
virtual void	TObject::RecursiveRemove(TObject* obj)
virtual void	Reset()
void	TObject::ResetBit(UInt_t f)
virtual void	TObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual void	TObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
void	TObject::SetBit(UInt_t f)
void	TObject::SetBit(UInt_t f, Bool_t set)
void	SetCorrection(Bool_t correction)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
void	SetMaxDelta(Float_t maxDelta)
void	SetMaxPointRadius(Double_t radius)
void	AliTrackFitter::SetMinNPoints(Int_t n)
void	SetMinPointRadius(Double_t radius)
static void	TObject::SetObjectStat(Bool_t stat)
void	SetParam(Int_t i, Double_t par)
virtual void	AliTrackFitter::SetTrackPointArray(AliTrackPointArray* array, Bool_t owner = kTRUE)
virtual void	TObject::SetUniqueID(UInt_t uid)
virtual void	ShowMembers(TMemberInspector&)
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
virtual void	TObject::SysError(const char* method, const char* msgfmt) const
Bool_t	TObject::TestBit(UInt_t f) const
Int_t	TObject::TestBits(UInt_t f) const
virtual Bool_t	Update()
virtual void	TObject::UseCurrentStyle()
virtual void	TObject::Warning(const char* method, const char* msgfmt) const
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const

protected:

virtual void	TObject::DoError(int level, const char* location, const char* fmt, va_list va) const
void	TObject::MakeZombie()

private:

virtual Bool_t	AddPoint(const AliTrackPoint*)
virtual Bool_t	Begin(Int_t, Int_t)

Data Members

public:

enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

protected:

Double_t	fAlpha	angle to transform to the fitting coordinate system
Bool_t	fBCorrection	add correction for non-helicity
Float_t	AliTrackFitter::fChi2	Chi squared of the fit
Bool_t	fConv	indicates convergation
Double_t	fCorrY[4]	correction polynom coef
Double_t	fCorrZ[4]	correction polynom coef
TMatrixDSym*	AliTrackFitter::fCov	Track cov matrix
Bool_t	AliTrackFitter::fIsOwner	Is the object owner of the space points array
Float_t	fMaxDelta	maximal allowed delta in PCA exported for PCA minimization
Double_t	fMaxPointRadius	maximal allowed radius for the point to be included in the fit
Int_t	AliTrackFitter::fMinNPoints	Minimum allowed number of points
Double_t	fMinPointRadius	minimal allowed radius for the point to be included in the fit
Int_t	fNUsed	actual number of space-points used in the fit
Int_t	AliTrackFitter::fNdf	Number of degrees of freedom
AliTrackPointArray*	AliTrackFitter::fPTrack	Pointer to the array with track extrapolation points in volId
AliTrackPointArray*	AliTrackFitter::fPVolId	Pointer to the array with space-points in volId
Double_t	AliTrackFitter::fParams[6]	Track parameters
AliTrackPointArray*	AliTrackFitter::fPoints	Pointer to the array with track space points
AliRieman*	fRieman	rieman fitter

private:

TTreeSRedirector*	fDebugStream	!debug streamer

Class Charts

Inheritance Chart:

TObject

←

AliTrackFitter

←

AliTrackFitterRieman

Function documentation

AliTrackFitterRieman()

 default constructor

AliTrackFitterRieman(AliTrackPointArray* array, Bool_t owner = kTRUE)

 Constructor

AliTrackFitterRieman(const AliTrackFitterRieman& rieman)

 copy constructor

~AliTrackFitterRieman()

void Reset()

 Reset the track parameters and
 rieman sums

Bool_t Fit(const TArrayI* volIds, const TArrayI* volIdsFit = 0x0, AliGeomManager::ELayerID layerRangeMin = AliGeomManager::kFirstLayer, AliGeomManager::ELayerID layerRangeMax = AliGeomManager::kLastLayer)

 Fit the track points. The method takes as an input
 the set of id's (volids) of the volumes in which
 one wants to calculate the residuals.
 The following parameters are used to define the
 range of volumes to be used in the fitting
 As a result two AliTrackPointArray's obects are filled.
 The first one contains the space points with
 volume id's from volids list. The second array of points represents
 the track extrapolations corresponding to the space points
 in the first array. The two arrays can be used to find
 the residuals in the volids and consequently construct a
 chi2 function to be minimized during the alignment
 procedures. For the moment the track extrapolation is taken
 at the space-point reference plane. The reference plane is
 found using the covariance matrix of the point
 (assuming sigma(x)=0 at the reference coordinate system.

void AddPoint(Float_t x, Float_t y, Float_t z, Float_t sy, Float_t sz)

 add point to rieman fitter

Bool_t Update()

Bool_t GetPCA(const AliTrackPoint& p, AliTrackPoint& p2) const

 Get the closest to a given spacepoint track trajectory point
 Look for details in the description of the Fit() method

Double_t GetYat(Double_t x) const

 get y position at given point

Double_t GetZat(Double_t x) const

 get z position at given point

Double_t GetErrY2at(Double_t x) const

 get estimate of extrapolation error

Double_t GetErrZ2at(Double_t x) const

 get estimate of extrapolation error

void SetParam(Int_t i, Double_t par)

void SetMaxDelta(Float_t maxDelta)

{ fMaxDelta = maxDelta;}

Float_t GetMaxDelta() const

{ return fMaxDelta;}

void SetCorrection(Bool_t correction)

{ fBCorrection=correction;}

Bool_t GetCorrection() const

{return fBCorrection ;}

void AddPoint(Float_t x, Float_t y, Float_t z, Float_t sy, Float_t sz)

Double_t GetC() const

{return fRieman->GetC();}

Double_t GetDYat(Double_t x) const

{return fRieman->GetDYat(x);}

Double_t GetDZat(Double_t x) const

{return fRieman->GetDZat(x);}

Bool_t GetXYZat(Double_t r, Float_t* xyz) const

{return fRieman->GetXYZat(r, fAlpha,xyz);}

AliRieman * GetRieman() const

{return fRieman;}

Double_t GetAlpha() const

 Methods needed in order to use the class
 inside the millipede alignment algorithm

{ return fAlpha; }

void SetMinPointRadius(Double_t radius)

{ fMinPointRadius = radius; }

void SetMaxPointRadius(Double_t radius)

{ fMaxPointRadius = radius; }

Double_t GetMinPointRadius() const

{ return fMinPointRadius; }

Double_t GetMaxPointRadius() const

{ return fMaxPointRadius; }

Bool_t Begin(Int_t , Int_t )

{Reset(); return kTRUE;}