class TEllipse: public TObject, public TAttLine, public TAttFill

TEllipse : to draw ellipses

The ellipse can be truncated and rotated. It is defined by its center (x1,y1) and two radius r1 and r2. A minimum and maximum angle may be specified (phimin, phimax). The ellipse may be rotated with an angle theta. All these angles are in degrees. The attributes of the outline line are given via TAttLine. The attributes of the fill area are given via TAttFill. The picture below illustrates different types of ellipses.

When an ellipse sector only is drawn, the lines connecting the center of the ellipse to the edges are drawn by default. One can specify the drawing option "only" to not draw these lines or alternatively call the function SetNoEdges(). To remove completely the ellipse outline it is enough to specify 0 as line style. 


Picture
Source



output of MACRO_TEllipse_1_c1


//Draw ellipses
//Author: Rene Brun
{
   c1 = new TCanvas("c1");
   c1->Range(0,0,1,1);
   TPaveLabel pel(0.1,0.8,0.9,0.95,"Examples of Ellipses");
   pel.SetFillColor(42);
   pel.Draw();
   TEllipse el1(0.25,0.25,.1,.2);
   el1.Draw();
   TEllipse el2(0.25,0.6,.2,.1);
   el2.SetFillColor(6);
   el2.SetFillStyle(3008);
   el2.Draw();
   TEllipse el3(0.75,0.6,.2,.1,45,315);
   el3.SetFillColor(2);
   el3.SetFillStyle(1001);
   el3.SetLineColor(4);
   el3.Draw();
   TEllipse el4(0.75,0.25,.2,.15,45,315,62);
   el4.SetFillColor(5);
   el4.SetFillStyle(1001);
   el4.SetLineColor(4);
   el4.SetLineWidth(6);
   el4.Draw();
   return c1;
}
 








Function Members (Methods)


public:



TEllipse()


TEllipse(const TEllipse& ellipse)


TEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2 = 0, Double_t phimin = 0, Double_t phimax = 360, Double_t theta = 0)


 virtual~TEllipse()


voidTObject::AbstractMethod(const char* method) const


virtual voidTObject::AppendPad(Option_t* option = "")


virtual voidTObject::Browse(TBrowser* b)


static TClass*Class()


virtual const char*TObject::ClassName() const


virtual voidTObject::Clear(Option_t* = "")


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


virtual Int_tTObject::Compare(const TObject* obj) const


virtual voidCopy(TObject& ellipse) const


virtual voidTObject::Delete(Option_t* option = "")MENU 


Int_tTAttLine::DistancetoLine(Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)


virtual Int_tDistancetoPrimitive(Int_t px, Int_t py)


virtual voidDraw(Option_t* option = "")


virtual voidTObject::DrawClass() constMENU 


virtual TObject*TObject::DrawClone(Option_t* option = "") constMENU 


virtual voidDrawEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2, Double_t phimin, Double_t phimax, Double_t theta, Option_t* option = "")


virtual voidTObject::Dump() constMENU 


virtual voidTObject::Error(const char* method, const char* msgfmt) const


virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)


virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)


virtual voidExecuteEvent(Int_t event, Int_t px, Int_t py)


virtual voidTObject::Fatal(const char* method, const char* msgfmt) const


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


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


virtual Option_t*TObject::GetDrawOption() const


static Long_tTObject::GetDtorOnly()


virtual Color_tTAttFill::GetFillColor() const


virtual Style_tTAttFill::GetFillStyle() const


virtual const char*TObject::GetIconName() const


virtual Color_tTAttLine::GetLineColor() const


virtual Style_tTAttLine::GetLineStyle() const


virtual Width_tTAttLine::GetLineWidth() const


virtual const char*TObject::GetName() const


Bool_tGetNoEdges() const


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


static Bool_tTObject::GetObjectStat()


virtual Option_t*TObject::GetOption() const


Double_tGetPhimax() const


Double_tGetPhimin() const


Double_tGetR1() const


Double_tGetR2() const


Double_tGetTheta() const


virtual const char*TObject::GetTitle() const


virtual UInt_tTObject::GetUniqueID() const


Double_tGetX1() const


Double_tGetY1() const


virtual Bool_tTObject::HandleTimer(TTimer* timer)


virtual ULong_tTObject::Hash() const


virtual voidTObject::Info(const char* method, const char* msgfmt) const


virtual Bool_tTObject::InheritsFrom(const char* classname) const


virtual Bool_tTObject::InheritsFrom(const TClass* cl) const


virtual voidTObject::Inspect() constMENU 


voidTObject::InvertBit(UInt_t f)


virtual TClass*IsA() const


virtual Bool_tTObject::IsEqual(const TObject* obj) const


virtual Bool_tTObject::IsFolder() const


Bool_tTObject::IsOnHeap() const


virtual Bool_tTObject::IsSortable() const


virtual Bool_tTAttFill::IsTransparent() const


Bool_tTObject::IsZombie() const


virtual voidls(Option_t* option = "") const


voidTObject::MayNotUse(const char* method) const


virtual voidTAttLine::Modify()


virtual Bool_tTObject::Notify()


static voidTObject::operator delete(void* ptr)


static voidTObject::operator delete(void* ptr, void* vp)


static voidTObject::operator delete[](void* ptr)


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


void*TObject::operator new(size_t sz)


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


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


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


TEllipse&operator=(const TEllipse&)


virtual voidPaint(Option_t* option = "")


virtual voidPaintEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2, Double_t phimin, Double_t phimax, Double_t theta, Option_t* option = "")


virtual voidTObject::Pop()


virtual voidPrint(Option_t* option = "") const


virtual Int_tTObject::Read(const char* name)


virtual voidTObject::RecursiveRemove(TObject* obj)


virtual voidTAttFill::ResetAttFill(Option_t* option = "")


virtual voidTAttLine::ResetAttLine(Option_t* option = "")


voidTObject::ResetBit(UInt_t f)


virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU 


virtual voidTAttFill::SaveFillAttributes(ostream& out, const char* name, Int_t coldef = 1, Int_t stydef = 1001)


virtual voidTAttLine::SaveLineAttributes(ostream& out, const char* name, Int_t coldef = 1, Int_t stydef = 1, Int_t widdef = 1)


virtual voidSavePrimitive(ostream& out, Option_t* option = "")


voidTObject::SetBit(UInt_t f)


voidTObject::SetBit(UInt_t f, Bool_t set)


virtual voidTObject::SetDrawOption(Option_t* option = "")MENU 


static voidTObject::SetDtorOnly(void* obj)


virtual voidTAttFill::SetFillAttributes()MENU 


virtual voidTAttFill::SetFillColor(Color_t fcolor)


virtual voidTAttFill::SetFillStyle(Style_t fstyle)


virtual voidTAttLine::SetLineAttributes()MENU 


virtual voidTAttLine::SetLineColor(Color_t lcolor)


virtual voidTAttLine::SetLineStyle(Style_t lstyle)


virtual voidTAttLine::SetLineWidth(Width_t lwidth)


virtual voidSetNoEdges(Bool_t noEdges = kTRUE)TOGGLE GETTER 


static voidTObject::SetObjectStat(Bool_t stat)


virtual voidSetPhimax(Double_t phi = 360)MENU 


virtual voidSetPhimin(Double_t phi = 0)MENU 


virtual voidSetR1(Double_t r1)MENU 


virtual voidSetR2(Double_t r2)MENU 


virtual voidSetTheta(Double_t theta = 0)MENU 


virtual voidTObject::SetUniqueID(UInt_t uid)


virtual voidSetX1(Double_t x1)MENU 


virtual voidSetY1(Double_t y1)MENU 


virtual voidShowMembers(TMemberInspector& insp, char* parent)


virtual voidStreamer(TBuffer& b)


voidStreamerNVirtual(TBuffer& b)


virtual voidTObject::SysError(const char* method, const char* msgfmt) const


Bool_tTObject::TestBit(UInt_t f) const


Int_tTObject::TestBits(UInt_t f) const


virtual voidTObject::UseCurrentStyle()


virtual voidTObject::Warning(const char* method, const char* msgfmt) const


virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)


virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const





protected:



virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const


voidTObject::MakeZombie()










Data Members


public:



enum  { kNoEdges


};


enum TObject::EStatusBits { kCanDelete


kMustCleanup


kObjInCanvas


kIsReferenced


kHasUUID


kCannotPick


kNoContextMenu


kInvalidObject


};


enum TObject::[unnamed] { kIsOnHeap


kNotDeleted


kZombie


kBitMask


kSingleKey


kOverwrite


kWriteDelete


};





protected:



Color_tTAttFill::fFillColorfill area color


Style_tTAttFill::fFillStylefill area style


Color_tTAttLine::fLineColorline color


Style_tTAttLine::fLineStyleline style


Width_tTAttLine::fLineWidthline width


Double_tfPhimaxMaximum angle (degrees)


Double_tfPhiminMinimum angle (degrees)


Double_tfR1first radius


Double_tfR2second radius


Double_tfThetaRotation angle (degrees)


Double_tfX1X coordinate of centre


Double_tfY1Y coordinate of centre







Class Charts



































Inheritance
Inherited Members
Includes
Libraries



Class Charts


Function documentation


 TEllipse(const TEllipse& ellipse)


 Ellipse default constructor.





 TEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2 = 0, Double_t phimin = 0, Double_t phimax = 360, Double_t theta = 0)


 Ellipse normal constructor.





 ~TEllipse()


 Ellipse default destructor.





 TEllipse(const TEllipse& ellipse)


 Copy constructor.





void Copy(TObject& ellipse) const


 Copy this ellipse to ellipse.





Int_t DistancetoPrimitive(Int_t px, Int_t py)


 Compute distance from point px,py to an ellipse.

  Compute the closest distance of approach from point px,py to this ellipse.
  The distance is computed in pixels units.





void Draw(Option_t* option = "")


 Draw this ellipse with its current attributes.





void DrawEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2, Double_t phimin, Double_t phimax, Double_t theta, Option_t* option = "")


 Draw this ellipse with new coordinates.





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


 Execute action corresponding to one event.

  This member function is called when a line is clicked with the locator

  If Left button clicked on one of the line end points, this point
     follows the cursor until button is released.

  if Middle button clicked, the line is moved parallel to itself
     until the button is released.

  NOTE that support for log scale is not implemented





void ls(Option_t* option = "") const


 List this ellipse with its attributes.





void Paint(Option_t* option = "")


 Paint this ellipse with its current attributes.





void PaintEllipse(Double_t x1, Double_t y1, Double_t r1, Double_t r2, Double_t phimin, Double_t phimax, Double_t theta, Option_t* option = "")


 Draw this ellipse with new coordinates.





void Print(Option_t* option = "") const


 Dump this ellipse with its attributes.





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


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





Bool_t GetNoEdges()


 Return kTRUE if kNoEdges bit is set, kFALSE otherwise.





void SetNoEdges(Bool_t noEdges = kTRUE)


 if  noEdges = kTRUE the lines connecting the center to the edges
 will not be drawn.
 default is to draw the edges.





void Streamer(TBuffer& b)


 Stream an object of class TEllipse.





Double_t GetX1()



{return fX1;}






Double_t GetY1()



{return fY1;}






Double_t GetR1()



{return fR1;}






Double_t GetR2()



{return fR2;}






Double_t GetPhimin()



{return fPhimin;}






Double_t GetPhimax()



{return fPhimax;}






Double_t GetTheta()



{return fTheta;}






void SetPhimin(Double_t phi = 0)



{fPhimin=phi;}






void SetPhimax(Double_t phi = 360)



{fPhimax=phi;}






void SetR1(Double_t r1)



{fR1=r1;}






void SetR2(Double_t r2)



{fR2=r2;}






void SetTheta(Double_t theta = 0)



{fTheta=theta;}






void SetX1(Double_t x1)



{fX1=x1;}






void SetY1(Double_t y1)



{fY1=y1;}









Author:  Rene Brun   16/10/95

Last change: root/graf:$Id: TEllipse.h 20882 2007-11-19 11:31:26Z rdm $

Last generated: 2008-06-25 08:36

Copyright   (C) 1995-2000, Rene Brun and Fons Rademakers.               *




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