ROOT   Reference Guide
Searching...
No Matches
TGLParametricEquation Class Reference

A parametric surface is a surface defined by a parametric equation, involving two parameters (u, v):

S(u, v) = (x(u, v), y(u, v), z(u, v)).
Double_t y[n]
Definition legend1.C:17
Double_t x[n]
Definition legend1.C:17

For example, "limpet torus" surface can be defined as:

x = cos(u) / (sqrt(2) + sin(v))
y = sin(u) / (sqrt(2) + sin(v))
z = 1 / (sqrt(2) + cos(v)),
double cos(double)
double sqrt(double)
double sin(double)

where -pi <= u <= pi, -pi <= v <= pi.

new TGLParametricEquation("Limpet_torus", "cos(u) / (sqrt(2.) + sin(v))",
"sin(u) / (sqrt(2.) + sin(v))",
"1 / (sqrt(2) + cos(v))");
A parametric surface is a surface defined by a parametric equation, involving two parameters (u,...

\$ROOTSYS/tutorials/gl/glparametric.C contains more examples.

Parametric equations can be specified:

• 1. by string expressions, as with TF2, but with 'u' instead of 'x' and 'v' instead of 'y'.
• 2. by function - see ParametricEquation_t declaration.

Definition at line 35 of file TGLParametric.h.

## Public Member Functions

TGLParametricEquation (const TString &name, const TString &xEquation, const TString &yEquation, const TString &zEquation, Double_t uMin, Double_t uMax, Double_t vMin, Double_t vMax)
Surface is defined by three strings.

TGLParametricEquation (const TString &name, ParametricEquation_t equation, Double_t uMin, Double_t uMax, Double_t vMin, Double_t vMax)
Surface defined by user's function (see ParametricEquation_t declaration in TGLParametricEquation.h)

Int_t DistancetoPrimitive (Int_t px, Int_t py)
Check, if parametric surface is under cursor.

void EvalVertex (TGLVertex3 &newVertex, Double_t u, Double_t v) const
Calculate vertex.

void ExecuteEvent (Int_t event, Int_t px, Int_t py)
Pass event to painter.

char * GetObjectInfo (Int_t px, Int_t py) const
No object info yet.

Rgl::Range_t GetURange () const
[uMin, uMax]

Rgl::Range_t GetVRange () const
[vMin, vMax]

Bool_t IsConstrained () const
Check is constrained.

Bool_t IsModified () const
Something was changed in parametric equation (or constrained option was changed).

void Paint (Option_t *option)
Delegate paint.

void SetConstrained (Bool_t c)
Set constrained.

void SetModified (Bool_t m)
Set modified.

Public Member Functions inherited from TNamed
TNamed ()

TNamed (const char *name, const char *title)

TNamed (const TNamed &named)
TNamed copy ctor.

TNamed (const TString &name, const TString &title)

virtual ~TNamed ()
TNamed destructor.

virtual void Clear (Option_t *option="")
Set name and title to empty strings ("").

virtual TObjectClone (const char *newname="") const
Make a clone of an object using the Streamer facility.

virtual Int_t Compare (const TObject *obj) const
Compare two TNamed objects.

virtual void Copy (TObject &named) const
Copy this to obj.

virtual void FillBuffer (char *&buffer)
Encode TNamed into output buffer.

virtual const char * GetName () const
Returns name of object.

virtual const char * GetTitle () const
Returns title of object.

virtual ULong_t Hash () const
Return hash value for this object.

virtual Bool_t IsSortable () const

virtual void ls (Option_t *option="") const
List TNamed name and title.

TNamedoperator= (const TNamed &rhs)
TNamed assignment operator.

virtual void Print (Option_t *option="") const
Print TNamed name and title.

virtual void SetName (const char *name)
Set the name of the TNamed.

virtual void SetNameTitle (const char *name, const char *title)
Set all the TNamed parameters (name and title).

virtual void SetTitle (const char *title="")
Set the title of the TNamed.

virtual Int_t Sizeof () const
Return size of the TNamed part of the TObject.

Public Member Functions inherited from TObject
TObject ()
TObject constructor.

TObject (const TObject &object)
TObject copy ctor.

virtual ~TObject ()
TObject destructor.

void AbstractMethod (const char *method) const
Use this method to implement an "abstract" method that you don't want to leave purely abstract.

Append graphics object to current pad.

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 Delete (Option_t *option="")
Delete this object.

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 TObjectDrawClone (Option_t *option="") const
Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad).

virtual void Dump () const
Dump contents of object on stdout.

virtual void Error (const char *method, const char *msgfmt,...) const
Issue error message.

virtual void Execute (const char *method, const char *params, Int_t *error=0)
Execute method on this object with the given parameter string, e.g.

virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
Execute method on this object with parameters stored in the TObjArray.

virtual void Fatal (const char *method, const char *msgfmt,...) const
Issue fatal error message.

virtual TObjectFindObject (const char *name) const
Must be redefined in derived classes.

virtual TObjectFindObject (const TObject *obj) const
Must be redefined in derived classes.

virtual Option_tGetDrawOption () const
Get option used by the graphics system to draw this object.

virtual const char * GetIconName () const
Returns mime type name of object.

virtual Option_tGetOption () const

virtual UInt_t GetUniqueID () const
Return the unique object id.

virtual Bool_t HandleTimer (TTimer *timer)
Execute action in response of a timer timing out.

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)

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).

R__ALWAYS_INLINE Bool_t IsOnHeap () const

R__ALWAYS_INLINE Bool_t IsZombie () 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).

virtual Bool_t Notify ()
This method must be overridden to handle object notification.

void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
Use this method to declare a method obsolete.

void operator delete (void *ptr)
Operator delete.

void operator delete[] (void *ptr)
Operator delete [].

voidoperator new (size_t sz)

voidoperator new (size_t sz, void *vp)

voidoperator new[] (size_t sz)

voidoperator new[] (size_t sz, void *vp)

TObjectoperator= (const TObject &rhs)
TObject assignment operator.

virtual void Pop ()
Pop on object drawn in a pad to the top of the display list.

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)

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.

virtual void SetUniqueID (UInt_t uid)
Set the unique object id.

virtual void SysError (const char *method, const char *msgfmt,...) const
Issue system error message.

R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const

Int_t TestBits (UInt_t f) const

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

virtual void Warning (const char *method, const char *msgfmt,...) const
Issue warning message.

virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
Write this object to the current directory.

virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
Write this object to the current directory.

## Private Types

typedef std::unique_ptr< TGLHistPainterPainter_t

typedef std::unique_ptr< TF2Ptr_t

## Private Member Functions

TGLParametricEquation (const TGLParametricEquation &)

TGLParametricEquationoperator= (const TGLParametricEquation &)

## Private Attributes

Bool_t fConstrained

ParametricEquation_t fEquation

Bool_t fModified

Painter_t fPainter

Rgl::Range_t fURange

Rgl::Range_t fVRange

Ptr_t fXEquation

Ptr_t fYEquation

Ptr_t fZEquation

Public Types inherited from TObject
enum  {
kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
}

enum  { kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }

enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum  EStatusBits {
kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) ,
kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13)
}

Static Public Member Functions inherited from TObject
static Long_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 inherited from TObject
enum  { kOnlyPrepStep = BIT(3) }

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

void MakeZombie ()

Protected Attributes inherited from TNamed
TString fName

TString fTitle

#include <TGLParametric.h>

Inheritance diagram for TGLParametricEquation:
[legend]

## ◆ Painter_t

 typedef std::unique_ptr TGLParametricEquation::Painter_t
private

Definition at line 51 of file TGLParametric.h.

## ◆ Ptr_t

 typedef std::unique_ptr TGLParametricEquation::Ptr_t
private

Definition at line 37 of file TGLParametric.h.

## ◆ TGLParametricEquation() [1/3]

 TGLParametricEquation::TGLParametricEquation ( const TString & name, const TString & xFun, const TString & yFun, const TString & zFun, Double_t uMin, Double_t uMax, Double_t vMin, Double_t vMax )

Surface is defined by three strings.

ROOT does not use exceptions in ctors, so, I have to use MakeZombie to let external user know about errors.

Definition at line 123 of file TGLParametric.cxx.

## ◆ TGLParametricEquation() [2/3]

 TGLParametricEquation::TGLParametricEquation ( const TString & name, ParametricEquation_t equation, Double_t uMin, Double_t uMax, Double_t vMin, Double_t vMax )

Surface defined by user's function (see ParametricEquation_t declaration in TGLParametricEquation.h)

Definition at line 171 of file TGLParametric.cxx.

## ◆ TGLParametricEquation() [3/3]

 TGLParametricEquation::TGLParametricEquation ( const TGLParametricEquation & )
private

## ◆ DistancetoPrimitive()

 Int_t TGLParametricEquation::DistancetoPrimitive ( Int_t px, Int_t py )
virtual

Check, if parametric surface is under cursor.

Reimplemented from TObject.

Definition at line 253 of file TGLParametric.cxx.

## ◆ EvalVertex()

 void TGLParametricEquation::EvalVertex ( TGLVertex3 & newVertex, Double_t u, Double_t v ) const

Calculate vertex.

Definition at line 237 of file TGLParametric.cxx.

## ◆ ExecuteEvent()

 void TGLParametricEquation::ExecuteEvent ( Int_t event, Int_t px, Int_t py )
virtual

Pass event to painter.

Reimplemented from TObject.

Definition at line 263 of file TGLParametric.cxx.

## ◆ GetObjectInfo()

 char * TGLParametricEquation::GetObjectInfo ( Int_t px, Int_t py ) const
virtual

No object info yet.

Reimplemented from TObject.

Definition at line 272 of file TGLParametric.cxx.

## ◆ GetURange()

 Rgl::Range_t TGLParametricEquation::GetURange ( ) const

[uMin, uMax]

Definition at line 189 of file TGLParametric.cxx.

## ◆ GetVRange()

 Rgl::Range_t TGLParametricEquation::GetVRange ( ) const

[vMin, vMax]

Definition at line 197 of file TGLParametric.cxx.

## ◆ IsConstrained()

 Bool_t TGLParametricEquation::IsConstrained ( ) const

Check is constrained.

Definition at line 205 of file TGLParametric.cxx.

## ◆ IsModified()

 Bool_t TGLParametricEquation::IsModified ( ) const

Something was changed in parametric equation (or constrained option was changed).

Definition at line 221 of file TGLParametric.cxx.

## ◆ operator=()

 TGLParametricEquation & TGLParametricEquation::operator= ( const TGLParametricEquation & )
private

## ◆ Paint()

 void TGLParametricEquation::Paint ( Option_t * option )
virtual

Delegate paint.

Reimplemented from TObject.

Definition at line 281 of file TGLParametric.cxx.

## ◆ SetConstrained()

 void TGLParametricEquation::SetConstrained ( Bool_t c )

Set constrained.

Definition at line 213 of file TGLParametric.cxx.

## ◆ SetModified()

 void TGLParametricEquation::SetModified ( Bool_t m )

Set modified.

Definition at line 229 of file TGLParametric.cxx.

## ◆ fConstrained

 Bool_t TGLParametricEquation::fConstrained
private

Definition at line 48 of file TGLParametric.h.

## ◆ fEquation

 ParametricEquation_t TGLParametricEquation::fEquation
private

Definition at line 43 of file TGLParametric.h.

## ◆ fModified

 Bool_t TGLParametricEquation::fModified
private

Definition at line 49 of file TGLParametric.h.

## ◆ fPainter

 Painter_t TGLParametricEquation::fPainter
private

Definition at line 54 of file TGLParametric.h.

## ◆ fURange

 Rgl::Range_t TGLParametricEquation::fURange
private

Definition at line 45 of file TGLParametric.h.

## ◆ fVRange

 Rgl::Range_t TGLParametricEquation::fVRange
private

Definition at line 46 of file TGLParametric.h.

## ◆ fXEquation

 Ptr_t TGLParametricEquation::fXEquation
private

Definition at line 39 of file TGLParametric.h.

## ◆ fYEquation

 Ptr_t TGLParametricEquation::fYEquation
private

Definition at line 40 of file TGLParametric.h.

## ◆ fZEquation

 Ptr_t TGLParametricEquation::fZEquation
private

Definition at line 41 of file TGLParametric.h.

Libraries for TGLParametricEquation:

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