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class AliTPCTransform: public AliTransform

          Implementation of the TPC transformation class

   Origin: Marian Ivanov   Marian.Ivanov@cern.ch
           Magnus Mager

   Class for tranformation of the coordinate frame
   Transformation
    local coordinate frame (sector, padrow, pad, timebine) ==>
    rotated global (tracking) cooridnate frame (sector, lx,ly,lz)

    Unisochronity  - (substract time0 - pad by pad)
    Drift velocity - Currently common drift velocity - functionality of AliTPCParam
    ExB effect     -

    Time of flight correction -
                   - Depends on the vertex position
                   - by default

    Usage:
          AliTPCclusterer::AddCluster
          AliTPCtracker::Transform

Function Members (Methods)

public:

	AliTPCTransform()
	AliTPCTransform(const AliTPCTransform& transform)
virtual	~AliTPCTransform()
void	TObject::AbstractMethod(const char* method) const
virtual void	TObject::AppendPad(Option_t* option = "")
void	ApplyTransformations(Double_t* xyz, Int_t volID)
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
void	GetCosAndSin(Int_t sector, Double_t& cos, Double_t& sin) const
const AliTPCRecoParam*	GetCurrentRecoParam() const
AliTPCRecoParam*	GetCurrentRecoParamNonConst() const
UInt_t	GetCurrentRunNumber() const
UInt_t	GetCurrentTimeStamp() const
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
virtual const char*	TObject::GetIconName() const
virtual const char*	TObject::GetName() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
virtual const char*	TObject::GetTitle() const
virtual UInt_t	TObject::GetUniqueID() const
void	Global2RotatedGlobal(Int_t sector, 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
void	Local2RotatedGlobal(Int_t sec, Double_t* x) 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)
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)
void	TObject::ResetBit(UInt_t f)
void	RotatedGlobal2Global(Int_t sector, Double_t* x) const
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	SetCurrentRecoParam(AliTPCRecoParam* param)
void	SetCurrentRun(Int_t run)
void	SetCurrentTimeStamp(Int_t timeStamp)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
static void	TObject::SetObjectStat(Bool_t stat)
void	SetPrimVertex(Double_t* vtx)
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 void	Transform(Double_t* x, Int_t* i, UInt_t time, Int_t coordinateType)
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:

AliTPCTransform&

operator=(const AliTPCTransform&)

Data Members

public:

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

private:

Double_t	fCoss[18]	cache the transformation
AliTPCRecoParam*	fCurrentRecoParam	! current reconstruction parameters
Int_t	fCurrentRun	! current run
UInt_t	fCurrentTimeStamp	! current time stamp
Double_t	fPrimVtx[3]	position of the primary vertex - needed for TOF correction
Double_t	fSins[18]	cache the transformation

Class Charts

Inheritance Chart:

TObject

←

AliTransform

←

AliTPCTransform

Function documentation

AliTPCTransform()

 Speed it up a bit!

AliTPCTransform(const AliTPCTransform& transform)

 Speed it up a bit!

~AliTPCTransform()

 Destructor

void SetPrimVertex(Double_t* vtx)

void Transform(Double_t* x, Int_t* i, UInt_t time, Int_t coordinateType)

 input: x[0] - pad row
        x[1] - pad
        x[2] - time in us
        i[0] - sector
 output: x[0] - x (all in the rotated global coordinate frame)
         x[1] - y
         x[2] - z

  primvtx     - position of the primary vertex
                used for the TOF correction
                TOF of particle calculated assuming the speed-of-light and
                line approximation

void Local2RotatedGlobal(Int_t sec, Double_t* x) const


 Tranform coordinate from
 row, pad, time to x,y,z

 Drift Velocity
 Current implementation - common drift velocity - for full chamber
 TODO: use a map or parametrisation!

void RotatedGlobal2Global(Int_t sector, Double_t* x) const

 transform possition rotated global to the global

void Global2RotatedGlobal(Int_t sector, Double_t* x) const

 tranform possition Global2RotatedGlobal

void GetCosAndSin(Int_t sector, Double_t& cos, Double_t& sin) const

void ApplyTransformations(Double_t* xyz, Int_t volID)

 Modify global position
 xyz    - global xyz position
 volID  - volID of detector (sector number)

UInt_t GetCurrentTimeStamp() const

{ return fCurrentTimeStamp;}

const AliTPCRecoParam * GetCurrentRecoParam() const

{return fCurrentRecoParam;}

AliTPCRecoParam * GetCurrentRecoParamNonConst() const

{return fCurrentRecoParam;}

UInt_t GetCurrentRunNumber() const

 set current values

{ return fCurrentRun;}

void SetCurrentRecoParam(AliTPCRecoParam* param)

{fCurrentRecoParam=param;}

void SetCurrentRun(Int_t run)

{fCurrentRun=run;}

void SetCurrentTimeStamp(Int_t timeStamp)

{fCurrentTimeStamp=timeStamp;}

AliTPCTransform& operator=(const AliTPCTransform& )