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gltf3.C
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1/// \file
2/// \ingroup tutorial_gl
3/// Draws the Klein bottle.
4/// Klein bottle is closed non-orientable surface that has no inside or
5/// outside. TF3 can be drawn in several styles:
6/// - default - like surface4
7/// - kMaple0 - very nice colours
8/// - kMaple1 - nice colours and outlines
9/// - kMaple2 - nice colour outlines.
10/// To switch between them, you can press 's' key.
11///
12/// \macro_image(nobatch)
13/// \macro_code
14///
15/// \author Timur Pocheptsov
16
17void gltf3()
18{
20 TCanvas *cnv = new TCanvas("gltf3", "TF3: Klein bottle", 200, 10, 600, 600);
21
22 TPaveLabel *title = new TPaveLabel(0.04, 0.86, 0.96, 0.98,
23 "\"gl\" option for TF3. Select plot and press 's' to change the color.");
24 title->SetFillColor(32);
25 title->Draw();
26
27 TPad *tf3Pad = new TPad("box", "box", 0.04, 0.04, 0.96, 0.8);
28 tf3Pad->Draw();
29
30 TFormula f1 = TFormula("f1", "x*x + y*y + z*z + 2*y - 1");
31 TFormula f2 = TFormula("f2", "x*x + y*y + z*z - 2*y - 1");
32
33 // Klein bottle with cut top&bottom parts
34 // The Klein bottle is a closed non-orientable surface that has no
35 // inside or outside.
36
37 TF3 *tf3 = new TF3("Klein Bottle","f1*(f2*f2-8*z*z) + 16*x*z*f2",
38 -3.5, 3.5, -3.5, 3.5, -2.5, 2.5);
39
40 tf3->SetFillColor(kRed);
41 tf3Pad->cd();
42 tf3->Draw("gl");
43}
@ kRed
Definition: Rtypes.h:66
R__EXTERN TStyle * gStyle
Definition: TStyle.h:412
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
The Canvas class.
Definition: TCanvas.h:23
A 3-Dim function with parameters.
Definition: TF3.h:28
virtual void Draw(Option_t *option="")
Draw this function with its current attributes.
Definition: TF3.cxx:177
The Formula class.
Definition: TFormula.h:87
The most important graphics class in the ROOT system.
Definition: TPad.h:26
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition: TPad.cxx:604
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition: TPad.cxx:1300
A Pave (see TPave) with a text centered in the Pave.
Definition: TPaveLabel.h:20
virtual void Draw(Option_t *option="")
Draw this pavelabel with its current attributes.
Definition: TPaveLabel.cxx:77
void SetCanvasPreferGL(Bool_t prefer=kTRUE)
Definition: TStyle.h:325
TF1 * f1
Definition: legend1.C:11