TLorentzVector Class Reference

Attention

TLorentzVector is a legacy class. It is slower and worse for serialization than the recommended superior alternative ROOT::Math::LorentzVector. ROOT provides specialisations of the ROOT::Math::LorentzVector template which offer superior runtime performance, i.e.:

• ROOT::Math::PtEtaPhiMVector based on pt (rho),eta,phi and M (t) coordinates in double precision
• ROOT::Math::PtEtaPhiEVector based on pt (rho),eta,phi and E (t) coordinates in double precision
• ROOT::Math::PxPyPzMVector based on px,py,pz and M (mass) coordinates in double precision
• ROOT::Math::PxPyPzEVector based on px,py,pz and E (energy) coordinates in double precision
• ROOT::Math::XYZTVector based on x,y,z,t coordinates (cartesian) in double precision (same as PxPyPzEVector)
• ROOT::Math::XYZTVectorF based on x,y,z,t coordinates (cartesian) in float precision (same as PxPyPzEVector but float)

More details can be found in the documentation of the Physics Vectors package.

Description

TLorentzVector is a general four-vector class, which can be used either for the description of position and time (x,y,z,t) or momentum and energy (px,py,pz,E).

Declaration

TLorentzVector has been implemented as a set a TVector3 and a Double_t variable. By default all components are initialized by zero.

TLorentzVector v1;      // initialized by (0., 0., 0., 0.)
TLorentzVector v2(1., 1., 1., 1.);
TLorentzVector v3(v1);
TLorentzVector v4(TVector3(1., 2., 3.),4.);

For backward compatibility there are two constructors from an Double_t and Float_t C array.

Access to the components

There are two sets of access functions to the components of a LorentzVector: X(), Y(), Z(), T() and Px(), Py(), Pz() and E(). Both sets return the same values but the first set is more relevant for use where TLorentzVector describes a combination of position and time and the second set is more relevant where TLorentzVector describes momentum and energy:

Double_t xx =v.X();
...
Double_t tt = v.T();
 
Double_t px = v.Px();
...
Double_t ee = v.E();

The components of TLorentzVector can also accessed by index:

xx = v(0);       or     xx = v[0];
yy = v(1);              yy = v[1];
zz = v(2);              zz = v[2];
tt = v(3);              tt = v[3];

You can use the Vect() member function to get the vector component of TLorentzVector:

TVector3 p = v.Vect();

For setting components also two sets of member functions can be used:

v.SetX(1.);        or    v.SetPx(1.);
...                               ...
v.SetT(1.);              v.SetE(1.);

To set more the one component by one call you can use the SetVect() function for the TVector3 part or SetXYZT(), SetPxPyPzE(). For convenience there is

also a SetXYZM():

v.SetVect(TVector3(1,2,3));
v.SetXYZT(x,y,z,t);
v.SetPxPyPzE(px,py,pz,e);
v.SetXYZM(x,y,z,m);   //   ->  v=(x,y,z,e=Sqrt(x*x+y*y+z*z+m*m))

Vector components in non-cartesian coordinate systems

There are a couple of member functions to get and set the TVector3 part of the parameters in spherical coordinate systems:

Double_t m, theta, cost, phi, pp, pp2, ppv2, pp2v2;
m = v.Rho();
t = v.Theta();
cost = v.CosTheta();
phi = v.Phi();
 
v.SetRho(10.);
v.SetTheta(TMath::Pi()*.3);
v.SetPhi(TMath::Pi());

or get information about the r-coordinate in cylindrical systems:

Double_t pp, pp2, ppv2, pp2v2;
pp = v.Perp();         // get transvers component
pp2 = v.Perp2();       // get transverse component squared
ppv2 = v.Perp(v1);     // get transvers component with
                       // respect to another vector
pp2v2 = v.Perp(v1);

for convenience there are two more set functions SetPtEtaPhiE(pt,eta,phi,e); and SetPtEtaPhiM(pt,eta,phi,m);

Arithmetic and comparison operators

The TLorentzVector class provides operators to add, subtract or compare four-vectors:

v3 = -v1;
v1 = v2+v3;
v1+= v3;
v1 = v2 + v3;
v1-= v3;
 
if (v1 == v2) {...}
if(v1 != v3) {...}

Magnitude/Invariant mass, beta, gamma, scalar product

The scalar product of two four-vectors is calculated with the (-,-,-,+) metric,

i.e. s = v1*v2 = t1*t2-x1*x2-y1*y2-z1*z2 The magnitude squared mag2 of a four-vector is therefore:

mag2 = v*v = t*t-x*x-y*y-z*z

It mag2 is negative mag = -Sqrt(-mag*mag). The member functions are:

Double_t s, s2;
s  = v1.Dot(v2);     // scalar product
s  = v1*v2;          // scalar product
s2 = v.Mag2();   or    s2 = v.M2();
s  = v.Mag();          s  = v.M();

Since in case of momentum and energy the magnitude has the meaning of invariant mass TLorentzVector provides the more meaningful aliases M2() and M(); The member functions Beta() and Gamma() returns beta and gamma = 1/Sqrt(1-beta*beta).

Lorentz boost

A boost in a general direction can be parameterised with three parameters which can be taken as the components of a three vector b = (bx,by,bz). With x = (x,y,z) and gamma = 1/Sqrt(1-beta*beta) (beta being the module of vector b), an arbitrary active Lorentz boost transformation (from the rod frame to the original frame) can be written as:

x = x' + (gamma-1)/(beta*beta) * (b*x') * b + gamma * t' * b
t = gamma (t'+ b*x').

The member function Boost() performs a boost transformation from the rod frame to the original frame. BoostVector() returns a TVector3 of the spatial components divided by the time component:

TVector3 b;
v.Boost(bx,by,bz);
v.Boost(b);
b = v.BoostVector();   // b=(x/t,y/t,z/t)

Rotations

There are four sets of functions to rotate the TVector3 component of a TLorentzVector:

rotation around axes

v.RotateX(TMath::Pi()/2.);
v.RotateY(.5);
v.RotateZ(.99);

rotation around an arbitrary axis

v.Rotate(TMath::Pi()/4., v1); // rotation around v1

transformation from rotated frame

v.RotateUz(direction); //  direction must be a unit TVector3

by TRotation (see TRotation)

TRotation r;
v.Transform(r);    or     v *= r; // Attention v=M*v

Misc

Angle between two vectors

Double_t a = v1.Angle(v2.Vect());  // get angle between v1 and v2

Light-cone components

Member functions Plus() and Minus() return the positive and negative light-cone components:

Double_t pcone = v.Plus();
Double_t mcone = v.Minus();

CAVEAT: The values returned are T{+,-}Z. It is known that some authors find it easier to define these components as (T{+,-}Z)/sqrt(2). Thus check what definition is used in the physics you're working in and adapt your code accordingly.

Transformation by TLorentzRotation

A general Lorentz transformation see class TLorentzRotation can be used by the Transform() member function, the *= or operator of the TLorentzRotation class:

TLorentzRotation l;
v.Transform(l);
v = l*v;     or     v *= l;  // Attention v = l*v

Definition at line 31 of file TLorentzVector.h.

Public Types
enum	{ kSingleKey = (1ULL << (0)) , kOverwrite = (1ULL << (1)) , kWriteDelete = (1ULL << (2)) }
enum	{   kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,   kBitMask = 0x00ffffff }
enum	{   kX =0 , kY =1 , kZ =2 , kT =3 ,   kNUM_COORDINATES =4 , kSIZE =kNUM_COORDINATES }
enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << (3)) }
enum	EStatusBits {   kCanDelete = (1ULL << (0)) , kMustCleanup = (1ULL << (3)) , kIsReferenced = (1ULL << (4)) , kHasUUID = (1ULL << (5)) ,   kCannotPick = (1ULL << (6)) , kNoContextMenu = (1ULL << (8)) , kInvalidObject = (1ULL << (13)) }
typedef Double_t	Scalar

Public Member Functions
	TLorentzVector ()
	TLorentzVector (const Double_t *carray)
	TLorentzVector (const Float_t *carray)
	TLorentzVector (const TLorentzVector &lorentzvector) noexcept
	TLorentzVector (const TVector3 &vector3, Double_t t)
	TLorentzVector (Double_t x, Double_t y, Double_t z, Double_t t)
	~TLorentzVector () override=default
void	AbstractMethod (const char *method) const
	Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.
Double_t	Angle (const TVector3 &v) const
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.
Double_t	Beta () const
void	Boost (const TVector3 &)
void	Boost (Double_t, Double_t, Double_t)
TVector3	BoostVector () const
virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action.
ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
virtual const char *	ClassName () const
	Returns name of class to which the object belongs.
virtual void	Clear (Option_t *="")
virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.
virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.
virtual void	Copy (TObject &object) const
	Copy this to obj.
Double_t	CosTheta () const
virtual void	Delete (Option_t *option="")
	Delete this object.
Double_t	DeltaPhi (const TLorentzVector &) const
Double_t	DeltaR (const TLorentzVector &, Bool_t useRapidity=kFALSE) const
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object.
Double_t	Dot (const TLorentzVector &) const
virtual void	Draw (Option_t *option="")
	Default Draw method for all objects.
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
Double_t	DrEtaPhi (const TLorentzVector &) const
Double_t	DrRapidityPhi (const TLorentzVector &) const
virtual void	Dump () const
	Dump contents of object on stdout.
Double_t	E () const
Double_t	Energy () const
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message.
Double_t	Et () const
Double_t	Et (const TVector3 &) const
Double_t	Et2 () const
Double_t	Et2 (const TVector3 &) const
Double_t	Eta () const
TVector2	EtaPhiVector ()
virtual void	Execute (const char *method, const char *params, Int_t *error=nullptr)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
	Execute method on this object with parameters stored in the TObjArray.
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py).
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.
virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.
Double_t	Gamma () const
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.
virtual const char *	GetIconName () const
	Returns mime type name of object.
virtual const char *	GetName () const
	Returns name of object.
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).
virtual Option_t *	GetOption () const
virtual const char *	GetTitle () const
	Returns title of object.
virtual UInt_t	GetUniqueID () const
	Return the unique object id.
void	GetXYZT (Double_t *carray) const
void	GetXYZT (Float_t *carray) const
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.
virtual ULong_t	Hash () const
	Return hash value for this object.
Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message.
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.
void	InvertBit (UInt_t f)
TClass *	IsA () const override
Bool_t	IsDestructed () const
	IsDestructed.
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).
virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
Bool_t	IsOnHeap () const
virtual Bool_t	IsSortable () const
Bool_t	IsZombie () const
virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout.
Double_t	M () const
Double_t	M2 () const
Double_t	Mag () const
Double_t	Mag2 () const
void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
Double_t	Minus () const
Double_t	Mt () const
Double_t	Mt2 () const
virtual Bool_t	Notify ()
	This method must be overridden to handle object notification (the base implementation is no-op).
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.
void	operator delete (void *, size_t)
	Operator delete for sized deallocation.
void	operator delete (void *ptr)
	Operator delete.
void	operator delete (void *ptr, void *vp)
	Only called by placement new when throwing an exception.
void	operator delete[] (void *, size_t)
	Operator delete [] for sized deallocation.
void	operator delete[] (void *ptr)
	Operator delete [].
void	operator delete[] (void *ptr, void *vp)
	Only called by placement new[] when throwing an exception.
void *	operator new (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz)
void *	operator new[] (size_t sz, void *vp)
	operator ROOT::Math::PxPyPzEVector () const
Bool_t	operator!= (const TLorentzVector &) const
Double_t &	operator() (int i)
Double_t	operator() (int i) const
Double_t	operator* (const TLorentzVector &) const
TLorentzVector	operator* (Double_t a) const
TLorentzVector &	operator*= (const TLorentzRotation &)
TLorentzVector &	operator*= (const TRotation &)
TLorentzVector &	operator*= (Double_t a)
TLorentzVector	operator+ (const TLorentzVector &) const
TLorentzVector &	operator+= (const TLorentzVector &)
TLorentzVector	operator- () const
TLorentzVector	operator- (const TLorentzVector &) const
TLorentzVector &	operator-= (const TLorentzVector &)
TLorentzVector &	operator= (const TLorentzVector &) noexcept
Bool_t	operator== (const TLorentzVector &) const
Double_t &	operator[] (int i)
Double_t	operator[] (int i) const
Double_t	P () const
virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself.
Double_t	Perp () const
Double_t	Perp (const TVector3 &v) const
Double_t	Perp2 () const
Double_t	Perp2 (const TVector3 &v) const
Double_t	Phi () const
Double_t	Plus () const
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.
void	Print (Option_t *option="") const override
	Print the TLorentz vector components as (x,y,z,t) and (P,eta,phi,E) representations.
Double_t	PseudoRapidity () const
Double_t	Pt () const
Double_t	Pt (const TVector3 &v) const
Double_t	Px () const
Double_t	Py () const
Double_t	Pz () const
Double_t	Rapidity () const
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.
virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.
void	ResetBit (UInt_t f)
Double_t	Rho () const
void	Rotate (Double_t, const TVector3 &)
void	RotateUz (const TVector3 &newUzVector)
void	RotateX (Double_t angle)
void	RotateY (Double_t angle)
void	RotateZ (Double_t angle)
virtual void	SaveAs (const char *filename="", Option_t *option="") const
	Save this object in the file specified by filename.
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out".
void	SetBit (UInt_t f)
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.
void	SetE (Double_t a)
void	SetPerp (Double_t)
void	SetPhi (Double_t phi)
void	SetPtEtaPhiE (Double_t pt, Double_t eta, Double_t phi, Double_t e)
void	SetPtEtaPhiM (Double_t pt, Double_t eta, Double_t phi, Double_t m)
void	SetPx (Double_t a)
void	SetPxPyPzE (Double_t px, Double_t py, Double_t pz, Double_t e)
void	SetPy (Double_t a)
void	SetPz (Double_t a)
void	SetRho (Double_t rho)
void	SetT (Double_t a)
void	SetTheta (Double_t theta)
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.
void	SetVect (const TVector3 &vect3)
void	SetVectM (const TVector3 &spatial, Double_t mass)
void	SetVectMag (const TVector3 &spatial, Double_t magnitude)
void	SetX (Double_t a)
void	SetXYZM (Double_t x, Double_t y, Double_t z, Double_t m)
void	SetXYZT (Double_t x, Double_t y, Double_t z, Double_t t)
void	SetY (Double_t a)
void	SetZ (Double_t a)
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message.
Double_t	T () const
Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
Double_t	Theta () const
TLorentzVector &	Transform (const TLorentzRotation &)
TLorentzVector &	Transform (const TRotation &)
virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
TVector3	Vect () const
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
Double_t	X () const
Double_t	Y () const
Double_t	Z () const

Static Public Member Functions
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.
static Bool_t	GetObjectStat ()
	Get status of object stat flag.
static void	SetDtorOnly (void *obj)
	Set destructor only flag.
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.

Protected Types
enum	{ kOnlyPrepStep = (1ULL << (3)) }

Protected Member Functions
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected).
void	MakeZombie ()

Static Protected Member Functions
static void	SavePrimitiveConstructor (std::ostream &out, TClass *cl, const char *variable_name, const char *constructor_agrs="", Bool_t empty_line=kTRUE)
	Save object constructor in the output stream "out".
static void	SavePrimitiveDraw (std::ostream &out, const char *variable_name, Option_t *option=nullptr)
	Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.
static TString	SavePrimitiveVector (std::ostream &out, const char *prefix, Int_t len, Double_t *arr, Int_t flag=0)
	Save array in the output stream "out" as vector.

Static Private Member Functions
static void	AddToTObjectTable (TObject *)
	Private helper function which will dispatch to TObjectTable::AddObj.

Private Attributes
UInt_t	fBits
	bit field status word
Double_t	fE
TVector3	fP
UInt_t	fUniqueID
	object unique identifier

Static Private Attributes
static Longptr_t	fgDtorOnly = 0
	object for which to call dtor only (i.e. no delete)
static Bool_t	fgObjectStat = kTRUE
	if true keep track of objects in TObjectTable

#include <TLorentzVector.h>

Inheritance diagram for TLorentzVector:

Member Typedef Documentation

Scalar

typedef Double_t TLorentzVector::Scalar

Definition at line 40 of file TLorentzVector.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

protectedinherited

Enumerator

kOnlyPrepStep

Used to request that the class specific implementation of TObject::Write just prepare the objects to be ready to be written but do not actually write them into the TBuffer. This is just for example by TBufferMerger to request that the TTree inside the file calls TTree::FlushBaskets (outside of the merging lock) and TBufferMerger will later ask for the write (inside the merging lock). To take advantage of this feature the class needs to overload TObject::Write and use this enum value accordingly. (See TTree::Write and TObject::Write) Do not use, this feature will be migrate to the Merge function (See TClass and TTree::Merge)

Definition at line 106 of file TObject.h.

anonymous enum

anonymous enum

inherited

Enumerator
kSingleKey	write collection with single key
kOverwrite	overwrite existing object with same name
kWriteDelete	write object, then delete previous key with same name

Definition at line 99 of file TObject.h.

anonymous enum

anonymous enum

inherited

Enumerator
kIsOnHeap	object is on heap
kNotDeleted	object has not been deleted
kZombie	object ctor failed
kInconsistent	class overload Hash but does call RecursiveRemove in destructor
kBitMask

Definition at line 89 of file TObject.h.

anonymous enum

anonymous enum

Enumerator
kX
kY
kZ
kT
kNUM_COORDINATES
kSIZE

Definition at line 42 of file TLorentzVector.h.

EDeprecatedStatusBits

enum TObject::EDeprecatedStatusBits

inherited

Enumerator
kObjInCanvas	for backward compatibility only, use kMustCleanup

Definition at line 84 of file TObject.h.

EStatusBits

enum TObject::EStatusBits

inherited

Enumerator
kCanDelete	if object in a list can be deleted
kMustCleanup	if object destructor must call RecursiveRemove()
kIsReferenced	if object is referenced by a TRef or TRefArray
kHasUUID	if object has a TUUID (its fUniqueID=UUIDNumber)
kCannotPick	if object in a pad cannot be picked
kNoContextMenu	if object does not want context menu
kInvalidObject	if object ctor succeeded but object should not be used

Definition at line 70 of file TObject.h.

Constructor & Destructor Documentation

TLorentzVector() [1/6]

TLorentzVector::TLorentzVector ( )

inline

Definition at line 608 of file TLorentzVector.h.

TLorentzVector() [2/6]

TLorentzVector::TLorentzVector ( Double_t x, Double_t y, Double_t z, Double_t t )

inline

Definition at line 611 of file TLorentzVector.h.

TLorentzVector() [3/6]

TLorentzVector::TLorentzVector ( const Double_t * carray )

inline

Definition at line 614 of file TLorentzVector.h.

TLorentzVector() [4/6]

TLorentzVector::TLorentzVector ( const Float_t * carray )

inline

Definition at line 617 of file TLorentzVector.h.

TLorentzVector() [5/6]

TLorentzVector::TLorentzVector ( const TVector3 & vector3, Double_t t )

inline

Definition at line 620 of file TLorentzVector.h.

TLorentzVector() [6/6]

TLorentzVector::TLorentzVector ( const TLorentzVector & lorentzvector )

inlinenoexcept

Definition at line 623 of file TLorentzVector.h.

~TLorentzVector()

TLorentzVector::~TLorentzVector ( )

overridedefault

Member Function Documentation

AbstractMethod()

void TObject::AbstractMethod ( const char * method ) const

inherited

Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.

In other word, this method acts as a "runtime purely virtual" warning instead of a "compiler purely virtual" error.

Warning

This interface is a legacy function that is no longer recommended to be used by new development code.

Note

The name "AbstractMethod" does not imply that it's an abstract method in the strict C++ sense.

Definition at line 1149 of file TObject.cxx.

AddToTObjectTable()

void TObject::AddToTObjectTable ( TObject * op )

staticprivateinherited

Private helper function which will dispatch to TObjectTable::AddObj.

Included here to avoid circular dependency between header files.

Definition at line 195 of file TObject.cxx.

Angle()

Double_t TLorentzVector::Angle ( const TVector3 & v ) const

inline

Definition at line 493 of file TLorentzVector.h.

AppendPad()

void TObject::AppendPad ( Option_t * option = "" )

virtualinherited

Append graphics object to current pad.

In case no current pad is set yet, create a default canvas with the name "c1".

Definition at line 204 of file TObject.cxx.

Beta()

Double_t TLorentzVector::Beta ( ) const

inline

Definition at line 518 of file TLorentzVector.h.

Boost() [1/2]

void TLorentzVector::Boost ( const TVector3 & b )

inline

Definition at line 566 of file TLorentzVector.h.

Boost() [2/2]

void TLorentzVector::Boost	(	Double_t	bx,
		Double_t	by,
		Double_t	bz )

Definition at line 266 of file TLorentzVector.cxx.

BoostVector()

TVector3 TLorentzVector::BoostVector ( ) const

inline

Definition at line 562 of file TLorentzVector.h.

Browse()

void TObject::Browse ( TBrowser * b )

virtualinherited

Browse object. May be overridden for another default action.

Reimplemented in RooPlot, ROOT::Experimental::XRooFit::xRooNode, ROOT::Internal::THnBaseBrowsable, TApplicationRemote, TASImage, TAxis3D, TBaseClass, TBranch, TBranchClones, TBranchElement, TBranchObject, TBranchSTL, TBrowserObject, TCanvas, TChain, TClass, TCollection, TCollectionPropertyBrowsable, TDatabasePDG, TDirectory, TDirectoryFile, TEfficiency, TF1, TFolder, TGenerator, TGeoManager, TGeometry, TGeoNode, TGeoOverlap, TGeoTrack, TGeoVolume, TGraph2D, TGraph, TH1, THbookBranch, THbookFile, THbookKey, THnBase, THStack, TKey, TKeyMapFile, TLeaf, TMacro, TMapFile, TMultiDimFit, TMultiGraph, TNode, TNtuple, TNtupleD, TPad, TPair, TParticleClassPDG, TPrincipal, TRecorder, TRemoteObject, TROOT, TRootIconList, TSPlot, TStyle, TSystemDirectory, TSystemFile, TTask, TTree, TTreePerfStats, and TVirtualBranchBrowsable.

Definition at line 218 of file TObject.cxx.

CheckedHash()

ULong_t TObject::CheckedHash ( )

inlineinherited

Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

The intent is for this routine to be called instead of directly calling the function Hash during "insert" operations. See TObject::HasInconsistenTObjectHash();

(*) The setup is consistent when all classes in the class hierarchy that overload TObject::Hash do call ROOT::CallRecursiveRemoveIfNeeded in their destructor. i.e. it is safe to call the Hash virtual function during the RecursiveRemove operation.

Definition at line 332 of file TObject.h.

Class()

TClass * TLorentzVector::Class ( )

static

Returns

TClass describing this class

Class_Name()

const char * TLorentzVector::Class_Name ( )

static

Returns

Name of this class

Class_Version()

constexpr Version_t TLorentzVector::Class_Version ( )

inlinestaticconstexpr

Returns

Version of this class

Definition at line 265 of file TLorentzVector.h.

ClassName()

const char * TObject::ClassName ( ) const

virtualinherited

Returns name of class to which the object belongs.

Definition at line 227 of file TObject.cxx.

Clear()

virtual void TObject::Clear ( Option_t * = "" )

inlinevirtualinherited

Reimplemented in JetEvent, RooLinkedList, ROOT::TSchemaRule, ROOT::v5::TFormula, TBackCompFitter, TBits, TBranchRef, TBtree, TCanvas, TClonesArray, TCollection, TDictAttributeMap, TDirectory, TEventList, TFitter, TFolder, TFormula, TFumili, TGeoCombiTrans, TGeoGenTrans, TGeoHMatrix, TGeoRotation, TGHtml, TGraph2D, TGTextEdit, TGTextEntry, TGTextView, TGView, THashList, THashTable, TLegend, TLinearFitter, TList, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TMap, TMatrixT< Element >, TMatrixT< AReal >, TMatrixT< Double_t >, TMatrixT< Float_t >, TMatrixTBase< Element >, TMatrixTBase< Double_t >, TMatrixTBase< Float_t >, TMatrixTSparse< Element >, TMatrixTSparse< Double_t >, TMatrixTSparse< Float_t >, TMatrixTSym< Element >, TMatrixTSym< Double_t >, TMatrixTSym< Float_t >, TMrbSubevent_Caen, TMultiDimFit, TMVA::MinuitWrapper, TMVA::ResultsClassification, TMVA::ResultsMulticlass, TMVA::ResultsRegression, TNamed, TNotifyLinkBase, TObjArray, TOrdCollection, TPad, TPaveText, TPrincipal, TProcessID, TRefArray, TRefTable, TStreamerInfo, TTask, TUsrHitBuffer, TVectorT< Element >, TVectorT< Double_t >, TVectorT< Float_t >, TViewPubDataMembers, TViewPubFunctions, TVirtualFitter, TVirtualPad, and TVirtualStreamerInfo.

Definition at line 127 of file TObject.h.

Clone()

TObject * TObject::Clone ( const char * newname = "" ) const

virtualinherited

Make a clone of an object using the Streamer facility.

If the object derives from TNamed, this function is called by TNamed::Clone. TNamed::Clone uses the optional argument to set a new name to the newly created object.

If the object class has a DirectoryAutoAdd function, it will be called at the end of the function with the parameter gDirectory. This usually means that the object will be appended to the current ROOT directory.

Reimplemented in RooAbsArg, RooAbsBinning, RooAbsCollection, RooAbsStudy, RooCatType, RooCmdArg, RooDataHist, RooDataSet, RooFitResult, RooLinkedList, RooStats::HypoTestResult, RooStats::ModelConfig, RooStudyPackage, RooTemplateProxy< T >, RooTemplateProxy< const RooHistFunc >, RooTemplateProxy< RooAbsCategory >, RooTemplateProxy< RooAbsPdf >, RooTemplateProxy< RooAbsReal >, RooTemplateProxy< RooAbsRealLValue >, RooTemplateProxy< RooMultiCategory >, RooTemplateProxy< RooRealVar >, RooWorkspace, TASImage, TChainIndex, TClass, TCollection, TF1, TFunction, TFunctionTemplate, TH1, TImage, TMethod, TMethodCall, TMinuit, TMVA::MinuitWrapper, TNamed, TStreamerInfo, and TTreeIndex.

Definition at line 243 of file TObject.cxx.

Compare()

Int_t TObject::Compare ( const TObject * obj ) const

virtualinherited

Compare abstract method.

Must be overridden if a class wants to be able to compare itself with other objects. Must return -1 if this is smaller than obj, 0 if objects are equal and 1 if this is larger than obj.

Reimplemented in RooAbsArg, RooDouble, TCollection, TEnvRec, TFileInfo, TGeoBranchArray, TGeoOverlap, TGFSFrameElement, TGLBFrameElement, TNamed, TObjString, TParameter< AParamType >, TParameter< Long64_t >, TStructNode, TStructNodeProperty, and TUrl.

Definition at line 258 of file TObject.cxx.

Copy()

void TObject::Copy ( TObject & object ) const

virtualinherited

Copy this to obj.

Reimplemented in ROOT::v5::TFormula, TArc, TArrow, TAxis3D, TAxis, TBox, TColor, TCrown, TDirectory, TDirectoryFile, TEllipse, TF12, TF1, TF1AbsComposition, TF1Convolution, TF1NormSum, TF2, TF3, TFile, TFolder, TFormula, TFrame, TGTextEdit, TGTextView, TH1, TH1C, TH1D, TH1F, TH1I, TH1L, TH1S, TH2, TH2C, TH2D, TH2F, TH2I, TH2L, TH2Poly, TH2S, TH3, TH3C, TH3D, TH3F, TH3I, TH3L, TH3S, THelix, TLatex, TLegend, TLegendEntry, TLine, TMarker, TMathText, TNamed, TPaletteAxis, TPave, TPaveClass, TPaveLabel, TPieSlice, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TProfile2D, TProfile3D, TProfile, TStyle, TSystemDirectory, TSystemFile, TText, TWbox, and TXTRU.

Definition at line 159 of file TObject.cxx.

CosTheta()

Double_t TLorentzVector::CosTheta ( ) const

inline

Definition at line 309 of file TLorentzVector.h.

DeclFileName()

const char * TLorentzVector::DeclFileName ( )

inlinestatic

Returns

Name of the file containing the class declaration

Definition at line 265 of file TLorentzVector.h.

Delete()

void TObject::Delete ( Option_t * option = "" )

virtualinherited

Delete this object.

Typically called as a command via the interpreter. Normally use "delete" operator when object has been allocated on the heap.

Reimplemented in RooLinkedList, TAxis, TBtree, TCanvas, TClonesArray, TCollection, TDirectory, TDirectoryFile, TExMap, TFile, TGFrame, TGItemContext, TGTextEdit, THashList, THashTable, TKey, TKeySQL, TKeyXML, TList, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TMap, TMVA::Results, TObjArray, TObjectTable, TOrdCollection, TProtoClass, TQCommand, TRefArray, TSystemDirectory, TSystemFile, TThread, TTree, TTreeViewer, TViewPubDataMembers, and TViewPubFunctions.

Definition at line 268 of file TObject.cxx.

DeltaPhi()

Double_t TLorentzVector::DeltaPhi ( const TLorentzVector & v ) const

inline

Definition at line 460 of file TLorentzVector.h.

DeltaR()

Double_t TLorentzVector::DeltaR ( const TLorentzVector & v, Bool_t useRapidity = kFALSE ) const

inline

Definition at line 468 of file TLorentzVector.h.

DistancetoPrimitive()

Int_t TObject::DistancetoPrimitive ( Int_t px, Int_t py )

virtualinherited

Computes distance from point (px,py) to the object.

This member function must be implemented for each graphics primitive. This default function returns a big number (999999).

Reimplemented in TASImage, TAxis3D, TAxis, TBox, TBRIK, TColorWheel, TCrown, TCurlyArc, TCurlyLine, TDiamond, TEfficiency, TEllipse, TF1, TF2, TF3, TFileDrawMap, TGenerator, TGeoBBox, TGeoCompositeShape, TGeoCone, TGeoConeSeg, TGeoEltu, TGeoHalfSpace, TGeoHype, TGeoNode, TGeoOverlap, TGeoParaboloid, TGeoPcon, TGeoPgon, TGeoScaledShape, TGeoShape, TGeoShapeAssembly, TGeoSphere, TGeoTessellated, TGeoTorus, TGeoTrack, TGeoTube, TGeoTubeSeg, TGeoVGShape, TGeoVolume, TGeoXtru, TGL5DDataSet, TGLHistPainter, TGLParametricEquation, TGLScenePad, TGLTH3Composition, TGLViewer, TGraph2D, TGraph, TGraphEdge, TGraphNode, TGraphPolargram, TH1, THistPainter, THStack, TLine, TMarker3DBox, TMarker, TMultiGraph, TNode, TPad, TPaletteAxis, TParallelCoord, TParallelCoordRange, TParallelCoordVar, TParticle, TPave, TPCON, TPie, TPieSlice, TPoints3DABC, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TPrimary, TScatter2D, TScatter, TSPHE, TSpider, TSpline, TStyle, TText, TTreePerfStats, TTUBE, TTUBS, TVirtualHistPainter, and TXTRU.

Definition at line 284 of file TObject.cxx.

DoError()

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

protectedvirtualinherited

Interface to ErrorHandler (protected).

Reimplemented in TThread, and TTreeViewer.

Definition at line 1059 of file TObject.cxx.

Dot()

Double_t TLorentzVector::Dot ( const TLorentzVector & q ) const

inline

Definition at line 535 of file TLorentzVector.h.

Draw()

void TObject::Draw ( Option_t * option = "" )

virtualinherited

Default Draw method for all objects.

Reimplemented in RooAbsData, RooPlot, RooStats::HypoTestInverterPlot, RooStats::SamplingDistPlot, ROOT::Experimental::XRooFit::xRooNLLVar::xRooHypoPoint, ROOT::Experimental::XRooFit::xRooNLLVar::xRooHypoSpace, ROOT::Experimental::XRooFit::xRooNode, ROOT::RGeoPainter, TArrow, TASImage, TBox, TBrowser, TButton, TCanvas, TChain, TClass, TClassTree, TCollection, TColorWheel, TDiamond, TDirectory, TEfficiency, TEllipse, TEveGeoNode, TEveGeoTopNode, TF1, TF2, TF3, TFile, TFITSHDU, TFrame, TGenerator, TGeoBatemanSol, TGeometry, TGeoNode, TGeoOverlap, TGeoPainter, TGeoParallelWorld, TGeoPhysicalNode, TGeoPolygon, TGeoShape, TGeoTrack, TGeoVGShape, TGeoVolume, TGItemContext, TGListTree, TGPicture, TGraph2D, TGraph, TGraphPolar, TGraphPolargram, TGraphStruct, TGraphTime, TH1, THelix, THStack, TLegend, TMarker, TMatrixTBase< Element >, TMatrixTBase< Double_t >, TMatrixTBase< Float_t >, TMultiDimFit, TMultiGraph, TMultiLayerPerceptron, TNode, TNodeDiv, TPad, TParallelCoord, TParallelCoordRange, TParallelCoordVar, TPave, TPaveLabel, TPavesText, TPaveText, TPie, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TRatioPlot, TSpider, TSpline, TStructViewer, TStructViewerGUI, TTree, TTreePerfStats, TVectorT< Element >, TVectorT< Double_t >, TVectorT< Float_t >, TVirtualPad, and TWbox.

Definition at line 293 of file TObject.cxx.

DrawClass()

void TObject::DrawClass ( ) const

virtualinherited

Draw class inheritance tree of the class to which this object belongs.

If a class B inherits from a class A, description of B is drawn on the right side of description of A. Member functions overridden by B are shown in class A with a blue line crossing-out the corresponding member function. The following picture is the class inheritance tree of class TPaveLabel:

Reimplemented in TGFrame, TSystemDirectory, and TSystemFile.

Definition at line 308 of file TObject.cxx.

DrawClone()

TObject * TObject::DrawClone ( Option_t * option = "" ) const

virtualinherited

Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).

If pad was not selected - gPad will be used.

Note

For histograms, use the more specialised TH1::DrawCopy().

Reimplemented in TAxis, TCanvas, TGFrame, TSystemDirectory, and TSystemFile.

Definition at line 319 of file TObject.cxx.

DrEtaPhi()

Double_t TLorentzVector::DrEtaPhi ( const TLorentzVector & v ) const

inline

Definition at line 480 of file TLorentzVector.h.

DrRapidityPhi()

Double_t TLorentzVector::DrRapidityPhi ( const TLorentzVector & v ) const

inline

Definition at line 484 of file TLorentzVector.h.

Dump()

void TObject::Dump ( ) const

virtualinherited

Dump contents of object on stdout.

Using the information in the object dictionary (class TClass) each data member is interpreted. If a data member is a pointer, the pointer value is printed

The following output is the Dump of a TArrow object:

fAngle                   0           Arrow opening angle (degrees)
fArrowSize               0.2         Arrow Size
fOption.*fData
fX1                      0.1         X of 1st point
fY1                      0.15        Y of 1st point
fX2                      0.67        X of 2nd point
fY2                      0.83        Y of 2nd point
fUniqueID                0           object unique identifier
fBits                    50331648    bit field status word
fLineColor               1           line color
fLineStyle               1           line style
fLineWidth               1           line width
fFillColor               19          fill area color
fFillStyle               1001        fill area style

Reimplemented in TClass, TCollection, TGFrame, TGPack, and TSystemFile.

Definition at line 367 of file TObject.cxx.

E()

Double_t TLorentzVector::E ( ) const

inline

Definition at line 289 of file TLorentzVector.h.

Energy()

Double_t TLorentzVector::Energy ( ) const

inline

Definition at line 290 of file TLorentzVector.h.

Error()

void TObject::Error ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue error message.

Use "location" to specify the method where the error occurred. Accepts standard printf formatting arguments.

Reimplemented in TFitResult.

Definition at line 1098 of file TObject.cxx.

Et() [1/2]

Double_t TLorentzVector::Et ( ) const

inline

Definition at line 444 of file TLorentzVector.h.

Et() [2/2]

Double_t TLorentzVector::Et ( const TVector3 & v ) const

inline

Definition at line 455 of file TLorentzVector.h.

Et2() [1/2]

Double_t TLorentzVector::Et2 ( ) const

inline

Definition at line 439 of file TLorentzVector.h.

Et2() [2/2]

Double_t TLorentzVector::Et2 ( const TVector3 & v ) const

inline

Definition at line 449 of file TLorentzVector.h.

Eta()

Double_t TLorentzVector::Eta ( ) const

inline

Definition at line 464 of file TLorentzVector.h.

EtaPhiVector()

TVector2 TLorentzVector::EtaPhiVector ( )

inline

Definition at line 488 of file TLorentzVector.h.

Execute() [1/2]

void TObject::Execute ( const char * method, const char * params, Int_t * error = nullptr )

virtualinherited

Execute method on this object with the given parameter string, e.g.

"3.14,1,\"text\"".

Reimplemented in ROOT::R::TRInterface, TCling, TContextMenu, TInterpreter, and TMethodCall.

Definition at line 378 of file TObject.cxx.

Execute() [2/2]

void TObject::Execute ( TMethod * method, TObjArray * params, Int_t * error = nullptr )

virtualinherited

Execute method on this object with parameters stored in the TObjArray.

The TObjArray should contain an argv vector like:

argv[0] ... argv[n] = the list of TObjString parameters

Reimplemented in ROOT::R::TRInterface, TCling, TContextMenu, TInterpreter, and TMethodCall.

Definition at line 398 of file TObject.cxx.

ExecuteEvent()

void TObject::ExecuteEvent ( Int_t event, Int_t px, Int_t py )

virtualinherited

Execute action corresponding to an event at (px,py).

This method must be overridden if an object can react to graphics events.

Reimplemented in TASImage, TASPaletteEditor::LimitLine, TAxis3D, TAxis, TBox, TButton, TCanvas, TCrown, TCurlyArc, TCurlyLine, TDiamond, TEfficiency, TEllipse, TF1, TF2, TF3, TFrame, TGenerator, TGeoManager, TGeoNode, TGeoOverlap, TGeoShape, TGeoTrack, TGeoVolume, TGL5DDataSet, TGLEventHandler, TGLHistPainter, TGLParametricEquation, TGLScenePad, TGLTH3Composition, TGLViewer, TGraph2D, TGraph, TGraphEdge, TGraphNode, TGraphPolargram, TGroupButton, TH1, THistPainter, TLine, TLink, TMarker3DBox, TMarker, TNode, TPad, TPaletteAxis, TParallelCoord, TParallelCoordRange, TParallelCoordVar, TParticle, TPave, TPie, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TPrimary, TScatter2D, TScatter, TSliderBox, TSpider, TSpline, TText, TTreePerfStats, TView3D, TView, TVirtualHistPainter, and TWbox.

Definition at line 415 of file TObject.cxx.

Fatal()

void TObject::Fatal ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue fatal error message.

Use "location" to specify the method where the fatal error occurred. Accepts standard printf formatting arguments.

Definition at line 1126 of file TObject.cxx.

FindObject() [1/2]

TObject * TObject::FindObject ( const char * name ) const

virtualinherited

Must be redefined in derived classes.

This function is typically used with TCollections, but can also be used to find an object by name inside this object.

Reimplemented in RooAbsCollection, RooLinkedList, TBtree, TCollection, TDirectory, TFolder, TGeometry, TGraph2D, TGraph, TH1, THashList, THashTable, THbookFile, TList, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TListOfTypes, TMap, TObjArray, TPad, TROOT, TViewPubDataMembers, and TViewPubFunctions.

Definition at line 425 of file TObject.cxx.

FindObject() [2/2]

TObject * TObject::FindObject ( const TObject * obj ) const

virtualinherited

Must be redefined in derived classes.

This function is typically used with TCollections, but can also be used to find an object inside this object.

Reimplemented in RooAbsCollection, RooLinkedList, TBtree, TCollection, TDirectory, TFolder, TGeometry, TGraph2D, TGraph, TH1, THashList, THashTable, THbookFile, TList, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TListOfTypes, TMap, TObjArray, TPad, TROOT, TViewPubDataMembers, and TViewPubFunctions.

Definition at line 435 of file TObject.cxx.

Gamma()

Double_t TLorentzVector::Gamma ( ) const

inline

Definition at line 522 of file TLorentzVector.h.

GetDrawOption()

Option_t * TObject::GetDrawOption ( ) const

virtualinherited

Get option used by the graphics system to draw this object.

Note that before calling object.GetDrawOption(), you must have called object.Draw(..) before in the current pad.

Reimplemented in TBrowser, TFitEditor, TGedFrame, TGFileBrowser, TRootBrowser, and TRootBrowserLite.

Definition at line 445 of file TObject.cxx.

GetDtorOnly()

Longptr_t TObject::GetDtorOnly ( )

staticinherited

Return destructor only flag.

Definition at line 1196 of file TObject.cxx.

GetIconName()

const char * TObject::GetIconName ( ) const

virtualinherited

Returns mime type name of object.

Used by the TBrowser (via TGMimeTypes class). Override for class of which you would like to have different icons for objects of the same class.

Reimplemented in ROOT::Experimental::XRooFit::xRooNode, TASImage, TBranch, TBranchElement, TGeoVolume, TGMainFrame, TKey, TMethodBrowsable, TSystemFile, and TVirtualBranchBrowsable.

Definition at line 472 of file TObject.cxx.

GetName()

const char * TObject::GetName ( ) const

virtualinherited

Returns name of object.

This default method returns the class name. Classes that give objects a name should override this method.

Reimplemented in RooAbsCollection, RooCatType, RooLinkedList, TArchiveMember, TCollection, TEnvRec, TEveGeoNode, TGaxis, TGeoDecayChannel, TGeoShape, TGeoVGShape, TGLEmbeddedViewer, TGLPShapeObj, TGLSAViewer, TGMenuEntry, TGMenuTitle, TGPicture, TGWindow, TIconBoxThumb, TMapFile, TMVA::DataSetInfo, TMVA::FitterBase, TMVA::MethodBase, TMVA::OptionBase, TMVA::PDF, TMVA::Reader, TMVA::VariableTransformBase, TNamed, TObjString, TPad, TPair, TParameter< AParamType >, TParameter< Long64_t >, TParticle, TPave, TPolyMarker3D, TPrimary, TQCommand, TQConnection, TQSlot, TRealData, TSQLClassColumnInfo, TSQLClassInfo, TSQLColumnData, TStatistic, TStructNode, TTreePerfStats, TTVRecord, TTVSession, TVirtualGeoTrack, TVirtualPad, and TXMLAttr.

Definition at line 462 of file TObject.cxx.

GetObjectInfo()

char * TObject::GetObjectInfo ( Int_t px, Int_t py ) const

virtualinherited

Returns string containing info about the object at position (px,py).

This method is typically overridden by classes of which the objects can report peculiarities for different positions. Returned string will be re-used (lock in MT environment).

Reimplemented in TASImage, TAxis3D, TColorWheel, TF1, TF2, TFileDrawMap, TGeoNode, TGeoTrack, TGeoVolume, TGL5DDataSet, TGLHistPainter, TGLParametricEquation, TGLTH3Composition, TGraph, TH1, THistPainter, TNode, TPaletteAxis, TParallelCoordVar, and TVirtualHistPainter.

Definition at line 491 of file TObject.cxx.

GetObjectStat()

Bool_t TObject::GetObjectStat ( )

staticinherited

Get status of object stat flag.

Definition at line 1181 of file TObject.cxx.

GetOption()

virtual Option_t * TObject::GetOption ( ) const

inlinevirtualinherited

Reimplemented in TArrow, TAxis3D, TFile, TGaxis, TGeoVolume, TH1, THelix, TLegendEntry, TMapFile, TNode, TPave, TPoints3DABC, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TPSocket, TSelector, TSocket, and TUDPSocket.

Definition at line 147 of file TObject.h.

GetTitle()

const char * TObject::GetTitle ( ) const

virtualinherited

Returns title of object.

This default method returns the class title (i.e. description). Classes that give objects a title should override this method.

Reimplemented in Axis2, TASImage, TAxis, TBaseClass, TClassMenuItem, TEveGeoNode, TEvePointSet, TGaxis, TGGroupFrame, TGLabel, TGLVEntry, TGTextButton, TGTextEntry, TGTextLBEntry, TKey, TMapFile, TNamed, TPad, TPair, TParallelCoordSelect, TParticle, TPaveLabel, TPrimary, TQCommand, TRootIconList, and TVirtualPad.

Definition at line 507 of file TObject.cxx.

GetUniqueID()

UInt_t TObject::GetUniqueID ( ) const

virtualinherited

Return the unique object id.

Definition at line 480 of file TObject.cxx.

GetXYZT() [1/2]

void TLorentzVector::GetXYZT ( Double_t * carray ) const

inline

Definition at line 356 of file TLorentzVector.h.

GetXYZT() [2/2]

void TLorentzVector::GetXYZT ( Float_t * carray ) const

inline

Definition at line 361 of file TLorentzVector.h.

HandleTimer()

Bool_t TObject::HandleTimer ( TTimer * timer )

virtualinherited

Execute action in response of a timer timing out.

This method must be overridden if an object has to react to timers.

Reimplemented in TGCommandPlugin, TGDNDManager, TGFileContainer, TGHtml, TGLEventHandler, TGPopupMenu, TGraphTime, TGScrollBar, TGShutter, TGTextEdit, TGTextEditor, TGTextEntry, TGTextView, TGToolTip, TGuiBldDragManager, TGWindow, and TTreeViewer.

Definition at line 516 of file TObject.cxx.

Hash()

ULong_t TObject::Hash ( ) const

virtualinherited

Return hash value for this object.

Note: If this routine is overloaded in a derived class, this derived class should also add

ROOT::CallRecursiveRemoveIfNeeded(*this)

Otherwise, when RecursiveRemove is called (by ~TObject or example) for this type of object, the transversal of THashList and THashTable containers will will have to be done without call Hash (and hence be linear rather than logarithmic complexity). You will also see warnings like

Error in <ROOT::Internal::TCheckHashRecursiveRemoveConsistency::CheckRecursiveRemove>: The class SomeName overrides
TObject::Hash but does not call TROOT::RecursiveRemove in its destructor.

Reimplemented in RooLinkedList, TASImagePlugin, TASPluginGS, TCollection, TEnvRec, TGObject, TGPicture, TIconBoxThumb, TImagePlugin, TNamed, TObjString, TPad, TPair, TParameter< AParamType >, TParameter< Long64_t >, TPave, and TStatistic.

Definition at line 539 of file TObject.cxx.

HasInconsistentHash()

Bool_t TObject::HasInconsistentHash ( ) const

inlineinherited

Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

missing call to RecursiveRemove in destructor).

Note: Since the consistency is only tested for during inserts, this routine will return true for object that have never been inserted whether or not they have a consistent setup. This has no negative side-effect as searching for the object with the right or wrong Hash will always yield a not-found answer (Since anyway no hash can be guaranteed unique, there is always a check)

Definition at line 366 of file TObject.h.

Info()

void TObject::Info ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue info message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1072 of file TObject.cxx.

InheritsFrom() [1/2]

Bool_t TObject::InheritsFrom ( const char * classname ) const

virtualinherited

Returns kTRUE if object inherits from class "classname".

Reimplemented in TClass.

Definition at line 549 of file TObject.cxx.

InheritsFrom() [2/2]

Bool_t TObject::InheritsFrom ( const TClass * cl ) const

virtualinherited

Returns kTRUE if object inherits from TClass cl.

Reimplemented in TClass.

Definition at line 557 of file TObject.cxx.

Inspect()

void TObject::Inspect ( ) const

virtualinherited

Dump contents of this object in a graphics canvas.

Same action as Dump but in a graphical form. In addition pointers to other objects can be followed.

The following picture is the Inspect of a histogram object:

Reimplemented in ROOT::Experimental::XRooFit::xRooNode, TGFrame, TInspectorObject, and TSystemFile.

Definition at line 570 of file TObject.cxx.

InvertBit()

void TObject::InvertBit ( UInt_t f )

inlineinherited

Definition at line 206 of file TObject.h.

IsA()

TClass * TLorentzVector::IsA ( ) const

inlineoverridevirtual

Returns

TClass describing current object

Reimplemented from TObject.

Definition at line 265 of file TLorentzVector.h.

IsDestructed()

Bool_t TObject::IsDestructed ( ) const

inlineinherited

IsDestructed.

Note

This function must be non-virtual as it can be used on destructed (but not yet modified) memory. This is used for example in TClonesArray to record the element that have been destructed but not deleted and thus are ready for re-use (by operator new with placement).

Returns

true if this object's destructor has been run.

Definition at line 186 of file TObject.h.

IsEqual()

Bool_t TObject::IsEqual ( const TObject * obj ) const

virtualinherited

Default equal comparison (objects are equal if they have the same address in memory).

More complicated classes might want to override this function.

Reimplemented in TGObject, TObjString, TPair, and TQCommand.

Definition at line 589 of file TObject.cxx.

IsFolder()

Bool_t TObject::IsFolder ( ) const

virtualinherited

Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

Reimplemented in ROOT::Experimental::XRooFit::xRooNode, ROOT::Internal::THnBaseBrowsable, TApplicationRemote, TAxis3D, TBaseClass, TBranch, TBranchClones, TBranchElement, TBranchObject, TBranchSTL, TBrowserObject, TCanvas, TClass, TCollection, TDatabasePDG, TDirectory, TFolder, TGeoManager, TGeometry, TGeoNode, TGeoNodeMatrix, TGeoOverlap, TGeoTrack, TGeoVolume, THbookFile, THbookKey, THnBase, TKey, TMapFile, TMultiDimFit, TNode, TPad, TPair, TParticleClassPDG, TPrincipal, TRemoteObject, TROOT, TRootIconList, TSPlot, TSystemDirectory, TTask, TTree, and TVirtualBranchBrowsable.

Definition at line 579 of file TObject.cxx.

IsOnHeap()

Bool_t TObject::IsOnHeap ( ) const

inlineinherited

Definition at line 160 of file TObject.h.

IsSortable()

virtual Bool_t TObject::IsSortable ( ) const

inlinevirtualinherited

Reimplemented in RooAbsArg, RooDouble, TCollection, TFileInfo, TGeoBranchArray, TGeoOverlap, TGFSFrameElement, TGLBFrameElement, TNamed, TObjString, TParameter< AParamType >, TParameter< Long64_t >, TPave, TStructNode, TStructNodeProperty, TUri, and TUrl.

Definition at line 158 of file TObject.h.

IsZombie()

Bool_t TObject::IsZombie ( ) const

inlineinherited

Definition at line 161 of file TObject.h.

ls()

void TObject::ls ( Option_t * option = "" ) const

virtualinherited

The ls function lists the contents of a class on stdout.

Ls output is typically much less verbose then Dump().

Reimplemented in ROOT::Detail::TSchemaRuleSet, ROOT::Experimental::XRooFit::xRooBrowser, ROOT::TSchemaRule, TAnnotation, TApplication, TBox, TCanvas, TChain, TChainElement, TClass, TClassTree, TCollection, TColor, TDirectory, TDirectoryFile, TEllipse, TFile, TFolder, TFree, TFriendElement, TFunction, TGeometry, TGeoNode, TGFrameElement, TGLayoutHints, THbookFile, THStack, TImage, TKey, TLine, TMapFile, TMarker, TNamed, TNode, TPad, TParameter< AParamType >, TParameter< Long64_t >, TPave, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TQCommand, TQConnection, TQConnectionList, TQSlot, TQUndoManager, TROOT, TStatistic, TStreamerBase, TStreamerElement, TStreamerInfo, TStreamerSTL, TTask, TText, TVirtualPad, and TVirtualStreamerInfo.

Definition at line 598 of file TObject.cxx.

M()

Double_t TLorentzVector::M ( ) const

inline

Definition at line 507 of file TLorentzVector.h.

M2()

Double_t TLorentzVector::M2 ( ) const

inline

Definition at line 506 of file TLorentzVector.h.

Mag()

Double_t TLorentzVector::Mag ( ) const

inline

Definition at line 501 of file TLorentzVector.h.

Mag2()

Double_t TLorentzVector::Mag2 ( ) const

inline

Definition at line 497 of file TLorentzVector.h.

MakeZombie()

void TObject::MakeZombie ( )

inlineprotectedinherited

Definition at line 55 of file TObject.h.

MayNotUse()

void TObject::MayNotUse ( const char * method ) const

inherited

Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

Definition at line 1160 of file TObject.cxx.

Minus()

Double_t TLorentzVector::Minus ( ) const

inline

Definition at line 558 of file TLorentzVector.h.

Mt()

Double_t TLorentzVector::Mt ( ) const

inline

Definition at line 513 of file TLorentzVector.h.

Mt2()

Double_t TLorentzVector::Mt2 ( ) const

inline

Definition at line 509 of file TLorentzVector.h.

Notify()

Bool_t TObject::Notify ( )

virtualinherited

This method must be overridden to handle object notification (the base implementation is no-op).

Different objects in ROOT use the Notify method for different purposes, in coordination with other objects that call this method at the appropriate time.

For example, TLeaf uses it to load class information; TBranchRef to load contents of referenced branches TBranchRef; most notably, based on Notify, TChain implements a callback mechanism to inform interested parties when it switches to a new sub-tree.

Reimplemented in h1analysis, h1analysisTreeReader, TARInterruptHandler, TASInputHandler, TASInterruptHandler, TASLogHandler, TASSigPipeHandler, TBlinkTimer, TBranchElement, TBranchRef, TBreakLineCom, TBrowserTimer, TCollection, TDelCharCom, TDelTextCom, TFileHandler, TGContainerKeyboardTimer, TGContainerScrollTimer, TGInputHandler, TGLRedrawTimer, TGTextEditHist, TGuiBldDragManagerRepeatTimer, TIdleTimer, TInsCharCom, TInsTextCom, TInterruptHandler, TLeafObject, TMessageHandler, TNotifyLink< Type >, TNotifyLink< RNoCleanupNotifierHelper >, TNotifyLink< ROOT::Detail::TBranchProxy >, TNotifyLink< TTreeReader >, TPopupDelayTimer, TProcessEventTimer, TRefTable, TRepeatTimer, TSBRepeatTimer, TSelector, TSelectorDraw, TSelectorEntries, TSignalHandler, TSingleShotCleaner, TSocketHandler, TStdExceptionHandler, TSysEvtHandler, TTermInputHandler, TThreadTimer, TTimeOutTimer, TTimer, TTipDelayTimer, TTree, TTreeFormula, TTreeFormulaManager, TTreeReader, TViewTimer, and TViewUpdateTimer.

Definition at line 618 of file TObject.cxx.

Obsolete()

void TObject::Obsolete ( const char * method, const char * asOfVers, const char * removedFromVers ) const

inherited

Use this method to declare a method obsolete.

Specify as of which version the method is obsolete and as from which version it will be removed.

Definition at line 1169 of file TObject.cxx.

operator delete() [1/3]

void TObject::operator delete ( void * ptr, size_t size )

inherited

Operator delete for sized deallocation.

Definition at line 1234 of file TObject.cxx.

operator delete() [2/3]

void TObject::operator delete ( void * ptr )

inherited

Operator delete.

Definition at line 1212 of file TObject.cxx.

operator delete() [3/3]

void TObject::operator delete ( void * ptr, void * vp )

inherited

Only called by placement new when throwing an exception.

Definition at line 1266 of file TObject.cxx.

operator delete[]() [1/3]

void TObject::operator delete[] ( void * ptr, size_t size )

inherited

Operator delete [] for sized deallocation.

Definition at line 1245 of file TObject.cxx.

operator delete[]() [2/3]

void TObject::operator delete[] ( void * ptr )

inherited

Operator delete [].

Definition at line 1223 of file TObject.cxx.

operator delete[]() [3/3]

void TObject::operator delete[] ( void * ptr, void * vp )

inherited

Only called by placement new[] when throwing an exception.

Definition at line 1274 of file TObject.cxx.

operator new() [1/2]

void * TObject::operator new ( size_t sz )

inlineinherited

Definition at line 189 of file TObject.h.

operator new() [2/2]

void * TObject::operator new ( size_t sz, void * vp )

inlineinherited

Definition at line 191 of file TObject.h.

operator new[]() [1/2]

void * TObject::operator new[] ( size_t sz )

inlineinherited

Definition at line 190 of file TObject.h.

operator new[]() [2/2]

void * TObject::operator new[] ( size_t sz, void * vp )

inlineinherited

Definition at line 192 of file TObject.h.

operator ROOT::Math::PxPyPzEVector()

TLorentzVector::operator ROOT::Math::PxPyPzEVector ( ) const

inline

Definition at line 259 of file TLorentzVector.h.

operator!=()

Bool_t TLorentzVector::operator!= ( const TLorentzVector & q ) const

inline

Definition at line 413 of file TLorentzVector.h.

operator()() [1/2]

Double_t & TLorentzVector::operator() ( int i )

inline

Definition at line 646 of file TLorentzVector.h.

operator()() [2/2]

Double_t TLorentzVector::operator() ( int i ) const

inline

Definition at line 628 of file TLorentzVector.h.

operator*() [1/2]

Double_t TLorentzVector::operator* ( const TLorentzVector & q ) const

inline

Definition at line 539 of file TLorentzVector.h.

operator*() [2/2]

TLorentzVector TLorentzVector::operator* ( Double_t a ) const

inline

Definition at line 405 of file TLorentzVector.h.

operator*=() [1/3]

TLorentzVector & TLorentzVector::operator*=

(

const TLorentzRotation &

m

)

Definition at line 286 of file TLorentzVector.cxx.

operator*=() [2/3]

TLorentzVector & TLorentzVector::operator*= ( const TRotation & m )

inline

Definition at line 594 of file TLorentzVector.h.

operator*=() [3/3]

TLorentzVector & TLorentzVector::operator*= ( Double_t a )

inline

Definition at line 399 of file TLorentzVector.h.

operator+()

TLorentzVector TLorentzVector::operator+ ( const TLorentzVector & q ) const

inline

Definition at line 375 of file TLorentzVector.h.

operator+=()

TLorentzVector & TLorentzVector::operator+= ( const TLorentzVector & q )

inline

Definition at line 379 of file TLorentzVector.h.

operator-() [1/2]

TLorentzVector TLorentzVector::operator- ( ) const

inline

Definition at line 395 of file TLorentzVector.h.

operator-() [2/2]

TLorentzVector TLorentzVector::operator- ( const TLorentzVector & q ) const

inline

Definition at line 385 of file TLorentzVector.h.

operator-=()

TLorentzVector & TLorentzVector::operator-= ( const TLorentzVector & q )

inline

Definition at line 389 of file TLorentzVector.h.

operator=()

TLorentzVector & TLorentzVector::operator= ( const TLorentzVector & q )

inlinenoexcept

Definition at line 369 of file TLorentzVector.h.

operator==()

Bool_t TLorentzVector::operator== ( const TLorentzVector & q ) const

inline

Definition at line 409 of file TLorentzVector.h.

operator[]() [1/2]

Double_t & TLorentzVector::operator[] ( int i )

inline

Definition at line 366 of file TLorentzVector.h.

operator[]() [2/2]

Double_t TLorentzVector::operator[] ( int i ) const

inline

Definition at line 367 of file TLorentzVector.h.

P()

Double_t TLorentzVector::P ( ) const

inline

Definition at line 288 of file TLorentzVector.h.

Paint()

void TObject::Paint ( Option_t * option = "" )

virtualinherited

This method must be overridden if a class wants to paint itself.

The difference between Paint() and Draw() is that when a object draws itself it is added to the display list of the pad in which it is drawn (and automatically redrawn whenever the pad is redrawn). While paint just draws the object without adding it to the pad display list.

Reimplemented in ROOT::Experimental::RTreeMapPainter, ROOT::RGeoPainter, TAnnotation, TArrow, TASImage, TASPaletteEditor::LimitLine, TASPaletteEditor::PaintPalette, TAxis3D, TBits, TBox, TButton, TCanvas, TClassTree, TCollection, TColorWheel, TCrown, TDiamond, TDirectory, TEfficiency, TEllipse, TEveArrow, TEveCaloViz, TEveDigitSet, TEveGeoShape, TEveGeoTopNode, TEvePlot3D, TEvePointSet, TEveProjectionAxes, TEveScene, TEveShape, TEveStraightLineSet, TEveText, TEveTriangleSet, TExec, TF1, TF2, TF3, TFile, TFileDrawMap, TFrame, TGaxis, TGenerator, TGeoBoolNode, TGeoIntersection, TGeoNode, TGeoOverlap, TGeoPainter, TGeoPhysicalNode, TGeoShape, TGeoSubtraction, TGeoTrack, TGeoUnion, TGeoVGShape, TGeoVolume, TGL5DDataSet, TGLHistPainter, TGLParametricEquation, TGLTH3Composition, TGraph2D, TGraph2DPainter, TGraph, TGraphEdge, TGraphNode, TGraphPolargram, TGraphTime, TH1, THistPainter, THStack, TLatex, TLegend, TLine, TMacro, TMarker3DBox, TMarker, TMathText, TMultiGraph, TNode, TNodeDiv, TPad, TPaletteAxis, TParallelCoord, TParallelCoordRange, TParallelCoordVar, TParticle, TPave, TPaveLabel, TPaveStats, TPavesText, TPaveText, TPie, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TPrimary, TRatioPlot, TScatter2D, TScatter, TShape, TSpectrum2Painter, TSpider, TSpline, TSQLFile, TStyle, TText, TTreePerfStats, TVirtualGeoPainter, TVirtualGeoTrack, TVirtualHistPainter, TVirtualPad, TWbox, and TXMLFile.

Definition at line 631 of file TObject.cxx.

Perp() [1/2]

Double_t TLorentzVector::Perp ( ) const

inline

Definition at line 419 of file TLorentzVector.h.

Perp() [2/2]

Double_t TLorentzVector::Perp ( const TVector3 & v ) const

inline

Definition at line 431 of file TLorentzVector.h.

Perp2() [1/2]

Double_t TLorentzVector::Perp2 ( ) const

inline

Definition at line 417 of file TLorentzVector.h.

Perp2() [2/2]

Double_t TLorentzVector::Perp2 ( const TVector3 & v ) const

inline

Definition at line 427 of file TLorentzVector.h.

Phi()

Double_t TLorentzVector::Phi ( ) const

inline

Definition at line 301 of file TLorentzVector.h.

Plus()

Double_t TLorentzVector::Plus ( ) const

inline

Definition at line 554 of file TLorentzVector.h.

Pop()

void TObject::Pop ( )

virtualinherited

Pop on object drawn in a pad to the top of the display list.

I.e. it will be drawn last and on top of all other primitives.

Reimplemented in TFrame, TPad, and TVirtualPad.

Definition at line 640 of file TObject.cxx.

Print()

void TLorentzVector::Print ( Option_t * option = "" ) const

overridevirtual

Print the TLorentz vector components as (x,y,z,t) and (P,eta,phi,E) representations.

Reimplemented from TObject.

Definition at line 326 of file TLorentzVector.cxx.

PseudoRapidity()

Double_t TLorentzVector::PseudoRapidity ( ) const

inline

Definition at line 570 of file TLorentzVector.h.

Pt() [1/2]

Double_t TLorentzVector::Pt ( ) const

inline

Definition at line 421 of file TLorentzVector.h.

Pt() [2/2]

Double_t TLorentzVector::Pt ( const TVector3 & v ) const

inline

Definition at line 435 of file TLorentzVector.h.

Px()

Double_t TLorentzVector::Px ( ) const

inline

Definition at line 285 of file TLorentzVector.h.

Py()

Double_t TLorentzVector::Py ( ) const

inline

Definition at line 286 of file TLorentzVector.h.

Pz()

Double_t TLorentzVector::Pz ( ) const

inline

Definition at line 287 of file TLorentzVector.h.

Rapidity()

Double_t TLorentzVector::Rapidity

(

)

const

Definition at line 280 of file TLorentzVector.cxx.

Read()

Int_t TObject::Read ( const char * name )

virtualinherited

Read contents of object with specified name from the current directory.

First the key with the given name is searched in the current directory, next the key buffer is deserialized into the object. The object must have been created before via the default constructor. See TObject::Write().

Reimplemented in TBuffer, TKey, TKeySQL, and TKeyXML.

Definition at line 673 of file TObject.cxx.

RecursiveRemove()

void TObject::RecursiveRemove ( TObject * obj )

virtualinherited

Recursively remove this object from a list.

Typically implemented by classes that can contain multiple references to a same object.

Reimplemented in RooAbsCollection, RooAbsData, RooLinkedList, RooMCStudy, ROOT::Internal::TCheckHashRecursiveRemoveConsistency, ROOT::RBrowserDataCleanup, RooWorkspace, TBrowser, TChain, TCling, TCollection, TDialogCanvas, TDirectory, TEfficiency, TFileMerger, TFitEditor, TFolder, TFriendElement, TGedEditor, TGeometry, TGFileBrowser, TGraph2D, TGraph, TH1, TH1Editor, TH2Editor, THashList, THistPainter, THStack, TInspectCanvas, TLegend, TList, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TMultiGraph, TNode, TObjArray, TObjectRefSpy, TObjectSpy, TPad, TProcessID, TROOT, TRootBrowser, TRootBrowserHistory, TRootBrowserLite, TRootContextMenu, TTree, TTreePlayer, TViewPubDataMembers, TViewPubFunctions, and TVirtualPad.

Definition at line 684 of file TObject.cxx.

ResetBit()

void TObject::ResetBit ( UInt_t f )

inlineinherited

Definition at line 203 of file TObject.h.

Rho()

Double_t TLorentzVector::Rho ( ) const

inline

Definition at line 314 of file TLorentzVector.h.

Rotate()

void TLorentzVector::Rotate ( Double_t a, const TVector3 & v )

inline

Definition at line 590 of file TLorentzVector.h.

RotateUz()

void TLorentzVector::RotateUz ( const TVector3 & newUzVector )

inline

Definition at line 586 of file TLorentzVector.h.

RotateX()

void TLorentzVector::RotateX ( Double_t angle )

inline

Definition at line 574 of file TLorentzVector.h.

RotateY()

void TLorentzVector::RotateY ( Double_t angle )

inline

Definition at line 578 of file TLorentzVector.h.

RotateZ()

void TLorentzVector::RotateZ ( Double_t angle )

inline

Definition at line 582 of file TLorentzVector.h.

SaveAs()

void TObject::SaveAs ( const char * filename = "", Option_t * option = "" ) const

virtualinherited

Save this object in the file specified by filename.

• if "filename" contains ".root" the object is saved in filename as root binary file.
• if "filename" contains ".xml" the object is saved in filename as a xml ascii file.
• if "filename" contains ".cc" the object is saved in filename as C code independent from ROOT. The code is generated via SavePrimitive(). Specific code should be implemented in each object to handle this option. Like in TF1::SavePrimitive().

• otherwise the object is written to filename as a CINT/C++ script. The C++ code to rebuild this object is generated via SavePrimitive(). The "option" parameter is passed to SavePrimitive. By default it is an empty string. It can be used to specify the Draw option in the code generated by SavePrimitive.

  The function is available via the object context menu.

Reimplemented in ROOT::Experimental::XRooFit::xRooNode, TClassTree, TFolder, TGeoVolume, TGObject, TGraph, TH1, TPad, TPaveClass, TSpline3, TSpline5, TSpline, TTreePerfStats, and TVirtualPad.

Definition at line 708 of file TObject.cxx.

SavePrimitive()

void TObject::SavePrimitive ( std::ostream & out, Option_t * option = "" )

virtualinherited

Save a primitive as a C++ statement(s) on output stream "out".

Reimplemented in TAnnotation, TArc, TArrow, TASImage, TAxis3D, TBox, TButton, TCanvas, TChain, TCrown, TCurlyArc, TCurlyLine, TCutG, TDiamond, TEfficiency, TEllipse, TExec, TF12, TF1, TF2, TF3, TFrame, TGaxis, TGButton, TGButtonGroup, TGCanvas, TGCheckButton, TGColorSelect, TGColumnLayout, TGComboBox, TGCompositeFrame, TGContainer, TGDockableFrame, TGDoubleHSlider, TGDoubleVSlider, TGedMarkerSelect, TGedPatternSelect, TGeoArb8, TGeoBBox, TGeoBoolNode, TGeoCombiTrans, TGeoCompositeShape, TGeoCone, TGeoConeSeg, TGeoCtub, TGeoDecayChannel, TGeoElementRN, TGeoEltu, TGeoGtra, TGeoHalfSpace, TGeoHMatrix, TGeoHype, TGeoIdentity, TGeoIntersection, TGeoMaterial, TGeoMedium, TGeoMixture, TGeoPara, TGeoParaboloid, TGeoPatternCylPhi, TGeoPatternCylR, TGeoPatternParaX, TGeoPatternParaY, TGeoPatternParaZ, TGeoPatternSphPhi, TGeoPatternSphR, TGeoPatternSphTheta, TGeoPatternTrapZ, TGeoPatternX, TGeoPatternY, TGeoPatternZ, TGeoPcon, TGeoPgon, TGeoRotation, TGeoScaledShape, TGeoShapeAssembly, TGeoSphere, TGeoSubtraction, TGeoTessellated, TGeoTorus, TGeoTranslation, TGeoTrap, TGeoTrd1, TGeoTrd2, TGeoTube, TGeoTubeSeg, TGeoUnion, TGeoVolume, TGeoXtru, TGFileContainer, TGFont, TGFrame, TGFSComboBox, TGGC, TGGroupFrame, TGHButtonGroup, TGHorizontal3DLine, TGHorizontalFrame, TGHorizontalLayout, TGHProgressBar, TGHScrollBar, TGHSlider, TGHSplitter, TGHtml, TGIcon, TGLabel, TGLayoutHints, TGLineStyleComboBox, TGLineWidthComboBox, TGListBox, TGListDetailsLayout, TGListLayout, TGListTree, TGListView, TGLVContainer, TGMainFrame, TGMatrixLayout, TGMdiFrame, TGMdiMainFrame, TGMdiMenuBar, TGMenuBar, TGMenuTitle, TGNumberEntry, TGNumberEntryField, TGPictureButton, TGPopupMenu, TGProgressBar, TGRadioButton, TGraph2D, TGraph2DAsymmErrors, TGraph2DErrors, TGraph, TGraphAsymmErrors, TGraphBentErrors, TGraphEdge, TGraphErrors, TGraphMultiErrors, TGraphNode, TGraphPolar, TGraphPolargram, TGraphStruct, TGroupButton, TGRowLayout, TGShapedFrame, TGShutter, TGShutterItem, TGSplitFrame, TGStatusBar, TGTab, TGTabLayout, TGTableLayout, TGTableLayoutHints, TGTextButton, TGTextEdit, TGTextEntry, TGTextLBEntry, TGTextView, TGTileLayout, TGToolBar, TGTransientFrame, TGTripleHSlider, TGTripleVSlider, TGVButtonGroup, TGVertical3DLine, TGVerticalFrame, TGVerticalLayout, TGVFileSplitter, TGVProgressBar, TGVScrollBar, TGVSlider, TGVSplitter, TGXYLayout, TGXYLayoutHints, TH1, TH2Poly, THelix, THStack, TLatex, TLegend, TLine, TMacro, TMarker3DBox, TMarker, TMathText, TMultiGraph, TPad, TPaletteAxis, TParallelCoord, TParallelCoordVar, TPave, TPaveClass, TPaveLabel, TPaveStats, TPavesText, TPaveText, TPie, TPieSlice, TPolyLine3D, TPolyLine, TPolyMarker3D, TPolyMarker, TProfile2D, TProfile3D, TProfile, TRootContainer, TRootEmbeddedCanvas, TScatter2D, TScatter, TSlider, TSliderBox, TSpline3, TSpline5, TStyle, TText, TTreePerfStats, and TWbox.

Definition at line 858 of file TObject.cxx.

SavePrimitiveConstructor()

void TObject::SavePrimitiveConstructor ( std::ostream & out, TClass * cl, const char * variable_name, const char * constructor_agrs = "", Bool_t empty_line = kTRUE )

staticprotectedinherited

Save object constructor in the output stream "out".

Can be used as first statement when implementing SavePrimitive() method for the object

Definition at line 777 of file TObject.cxx.

SavePrimitiveDraw()

void TObject::SavePrimitiveDraw ( std::ostream & out, const char * variable_name, Option_t * option = nullptr )

staticprotectedinherited

Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.

Definition at line 845 of file TObject.cxx.

SavePrimitiveVector()

TString TObject::SavePrimitiveVector ( std::ostream & out, const char * prefix, Int_t len, Double_t * arr, Int_t flag = 0 )

staticprotectedinherited

Save array in the output stream "out" as vector.

Create unique variable name based on prefix value Returns name of vector which can be used in constructor or in other places of C++ code If flag === kTRUE, just add empty line If flag === 111, check if array is empty and return nullptr or <vectorname>.data()

Definition at line 796 of file TObject.cxx.

SetBit() [1/2]

void TObject::SetBit ( UInt_t f )

inlineinherited

Definition at line 202 of file TObject.h.

SetBit() [2/2]

void TObject::SetBit ( UInt_t f, Bool_t set )

inherited

Set or unset the user status bits as specified in f.

Definition at line 888 of file TObject.cxx.

SetDrawOption()

void TObject::SetDrawOption ( Option_t * option = "" )

virtualinherited

Set drawing option for object.

This option only affects the drawing style and is stored in the option field of the TObjOptLink supporting a TPad's primitive list (TList). Note that it does not make sense to call object.SetDrawOption(option) before having called object.Draw().

Reimplemented in RooPlot, TAxis, TBrowser, TGedFrame, TGFrame, TPad, TPaveStats, TRootBrowserLite, TSystemDirectory, and TSystemFile.

Definition at line 871 of file TObject.cxx.

SetDtorOnly()

void TObject::SetDtorOnly ( void * obj )

staticinherited

Set destructor only flag.

Definition at line 1204 of file TObject.cxx.

SetE()

void TLorentzVector::SetE ( Double_t a )

inline

Definition at line 295 of file TLorentzVector.h.

SetObjectStat()

void TObject::SetObjectStat ( Bool_t stat )

staticinherited

Turn on/off tracking of objects in the TObjectTable.

Definition at line 1188 of file TObject.cxx.

SetPerp()

void TLorentzVector::SetPerp ( Double_t r )

inline

Definition at line 423 of file TLorentzVector.h.

SetPhi()

void TLorentzVector::SetPhi ( Double_t phi )

inline

Definition at line 322 of file TLorentzVector.h.

SetPtEtaPhiE()

void TLorentzVector::SetPtEtaPhiE ( Double_t pt, Double_t eta, Double_t phi, Double_t e )

inline

Definition at line 351 of file TLorentzVector.h.

SetPtEtaPhiM()

void TLorentzVector::SetPtEtaPhiM ( Double_t pt, Double_t eta, Double_t phi, Double_t m )

inline

Definition at line 346 of file TLorentzVector.h.

SetPx()

void TLorentzVector::SetPx ( Double_t a )

inline

Definition at line 292 of file TLorentzVector.h.

SetPxPyPzE()

void TLorentzVector::SetPxPyPzE ( Double_t px, Double_t py, Double_t pz, Double_t e )

inline

Definition at line 335 of file TLorentzVector.h.

SetPy()

void TLorentzVector::SetPy ( Double_t a )

inline

Definition at line 293 of file TLorentzVector.h.

SetPz()

void TLorentzVector::SetPz ( Double_t a )

inline

Definition at line 294 of file TLorentzVector.h.

SetRho()

void TLorentzVector::SetRho ( Double_t rho )

inline

Definition at line 326 of file TLorentzVector.h.

SetT()

void TLorentzVector::SetT ( Double_t a )

inline

Definition at line 283 of file TLorentzVector.h.

SetTheta()

void TLorentzVector::SetTheta ( Double_t theta )

inline

Definition at line 318 of file TLorentzVector.h.

SetUniqueID()

void TObject::SetUniqueID ( UInt_t uid )

virtualinherited

Set the unique object id.

Definition at line 899 of file TObject.cxx.

SetVect()

void TLorentzVector::SetVect ( const TVector3 & vect3 )

inline

Definition at line 299 of file TLorentzVector.h.

SetVectM()

void TLorentzVector::SetVectM ( const TVector3 & spatial, Double_t mass )

inline

Definition at line 531 of file TLorentzVector.h.

SetVectMag()

void TLorentzVector::SetVectMag ( const TVector3 & spatial, Double_t magnitude )

inline

Definition at line 527 of file TLorentzVector.h.

SetX()

void TLorentzVector::SetX ( Double_t a )

inline

Definition at line 280 of file TLorentzVector.h.

SetXYZM()

void TLorentzVector::SetXYZM ( Double_t x, Double_t y, Double_t z, Double_t m )

inline

Definition at line 339 of file TLorentzVector.h.

SetXYZT()

void TLorentzVector::SetXYZT ( Double_t x, Double_t y, Double_t z, Double_t t )

inline

Definition at line 330 of file TLorentzVector.h.

SetY()

void TLorentzVector::SetY ( Double_t a )

inline

Definition at line 281 of file TLorentzVector.h.

SetZ()

void TLorentzVector::SetZ ( Double_t a )

inline

Definition at line 282 of file TLorentzVector.h.

Streamer()

void TLorentzVector::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

Definition at line 298 of file TLorentzVector.cxx.

StreamerNVirtual()

void TLorentzVector::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 265 of file TLorentzVector.h.

SysError()

void TObject::SysError ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue system error message.

Use "location" to specify the method where the system error occurred. Accepts standard printf formatting arguments.

Definition at line 1112 of file TObject.cxx.

T()

Double_t TLorentzVector::T ( ) const

inline

Definition at line 278 of file TLorentzVector.h.

TestBit()

Bool_t TObject::TestBit ( UInt_t f ) const

inlineinherited

Definition at line 204 of file TObject.h.

TestBits()

Int_t TObject::TestBits ( UInt_t f ) const

inlineinherited

Definition at line 205 of file TObject.h.

Theta()

Double_t TLorentzVector::Theta ( ) const

inline

Definition at line 305 of file TLorentzVector.h.

Transform() [1/2]

TLorentzVector & TLorentzVector::Transform

(

const TLorentzRotation &

m

)

Definition at line 292 of file TLorentzVector.cxx.

Transform() [2/2]

TLorentzVector & TLorentzVector::Transform ( const TRotation & m )

inline

Definition at line 599 of file TLorentzVector.h.

UseCurrentStyle()

void TObject::UseCurrentStyle ( )

virtualinherited

Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

Reimplemented in TAxis3D, TCanvas, TFrame, TGraph, TH1, TPad, TPaveStats, TPaveText, and TTree.

Definition at line 909 of file TObject.cxx.

Vect()

TVector3 TLorentzVector::Vect ( ) const

inline

Definition at line 297 of file TLorentzVector.h.

Warning()

void TObject::Warning ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue warning message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1084 of file TObject.cxx.

Write() [1/2]

Int_t TObject::Write ( const char * name = nullptr, Int_t option = 0, Int_t bufsize = 0 )

virtualinherited

Write this object to the current directory.

For more see the const version of this method.

Reimplemented in ROOT::TBufferMergerFile, TBuffer, TCollection, TDirectory, TDirectoryFile, TFile, TMap, TParallelMergingFile, TSQLFile, TTree, and TXMLFile.

Definition at line 989 of file TObject.cxx.

Write() [2/2]

Int_t TObject::Write ( const char * name = nullptr, Int_t option = 0, Int_t bufsize = 0 ) const

virtualinherited

Write this object to the current directory.

The data structure corresponding to this object is serialized. The corresponding buffer is written to the current directory with an associated key with name "name".

Writing an object to a file involves the following steps:

• Creation of a support TKey object in the current directory. The TKey object creates a TBuffer object.
• The TBuffer object is filled via the class::Streamer function.
• If the file is compressed (default) a second buffer is created to hold the compressed buffer.
• Reservation of the corresponding space in the file by looking in the TFree list of free blocks of the file.
• The buffer is written to the file.

Bufsize can be given to force a given buffer size to write this object. By default, the buffersize will be taken from the average buffer size of all objects written to the current file so far.

If a name is specified, it will be the name of the key. If name is not given, the name of the key will be the name as returned by GetName().

The option can be a combination of: kSingleKey, kOverwrite or kWriteDelete Using the kOverwrite option a previous key with the same name is overwritten. The previous key is deleted before writing the new object. Using the kWriteDelete option a previous key with the same name is deleted only after the new object has been written. This option is safer than kOverwrite but it is slower. NOTE: Neither kOverwrite nor kWriteDelete reduces the size of a TFile– the space is simply freed up to be overwritten; in the case of a TTree, it is more complicated. If one opens a TTree, appends some entries, then writes it out, the behaviour is effectively the same. If, however, one creates a new TTree and writes it out in this way, only the metadata is replaced, effectively making the old data invisible without deleting it. TTree::Delete() can be used to mark all disk space occupied by a TTree as free before overwriting its metadata this way. The kSingleKey option is only used by TCollection::Write() to write a container with a single key instead of each object in the container with its own key.

An object is read from the file into memory via TKey::Read() or via TObject::Read().

The function returns the total number of bytes written to the file. It returns 0 if the object cannot be written.

Reimplemented in TBuffer, TCollection, TDirectory, TDirectoryFile, TFile, TMap, TParallelMergingFile, TSQLFile, TTree, and TXMLFile.

Definition at line 964 of file TObject.cxx.

X()

Double_t TLorentzVector::X ( ) const

inline

Definition at line 275 of file TLorentzVector.h.

Y()

Double_t TLorentzVector::Y ( ) const

inline

Definition at line 276 of file TLorentzVector.h.

Z()

Double_t TLorentzVector::Z ( ) const

inline

Definition at line 277 of file TLorentzVector.h.

Member Data Documentation

fBits

UInt_t TObject::fBits

privateinherited

bit field status word

Definition at line 47 of file TObject.h.

fE

Double_t TLorentzVector::fE

private

Definition at line 36 of file TLorentzVector.h.

fgDtorOnly

Longptr_t TObject::fgDtorOnly = 0

staticprivateinherited

object for which to call dtor only (i.e. no delete)

Definition at line 49 of file TObject.h.

fgObjectStat

Bool_t TObject::fgObjectStat = kTRUE

staticprivateinherited

if true keep track of objects in TObjectTable

Definition at line 50 of file TObject.h.

fP

TVector3 TLorentzVector::fP

private

Definition at line 35 of file TLorentzVector.h.

fUniqueID

UInt_t TObject::fUniqueID

privateinherited

object unique identifier

Definition at line 46 of file TObject.h.

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

• math/physics/inc/TLorentzVector.h
• math/physics/src/TLorentzVector.cxx