gltf3.C File Reference

Detailed Description

Draws the Klein bottle.

Klein bottle is closed non-orientable surface that has no inside or outside. TF3 can be drawn in several styles:

• default - like surface4
• kMaple0 - very nice colours
• kMaple1 - nice colours and outlines
• kMaple2 - nice colour outlines. To switch between them, you can press 's' key.

 
void gltf3()
{
   gStyle->SetCanvasPreferGL(1);
   TCanvas *cnv = new TCanvas("gltf3", "TF3: Klein bottle", 200, 10, 600, 600);
 
   TPaveLabel *title = new TPaveLabel(0.04, 0.86, 0.96, 0.98,
      "\"gl\" option for TF3. Select plot and press 's' to change the color.");
   title->SetFillColor(32);
   title->Draw();
 
   TPad *tf3Pad  = new TPad("box", "box", 0.04, 0.04, 0.96, 0.8);
   tf3Pad->Draw();
 
   TFormula f1 = TFormula("f1", "x*x + y*y + z*z + 2*y - 1");
   TFormula f2 = TFormula("f2", "x*x + y*y + z*z - 2*y - 1");
 
   // Klein bottle with cut top&bottom parts
   // The Klein bottle is a closed non-orientable surface that has no
   // inside or outside.
 
   TF3 *tf3 = new TF3("Klein Bottle","f1*(f2*f2-8*z*z) + 16*x*z*f2",
                      -3.5, 3.5, -3.5, 3.5, -2.5, 2.5);
 
   tf3->SetFillColor(kRed);
   tf3Pad->cd();
   tf3->Draw("gl");
}

Author

Timur Pocheptsov

Definition in file gltf3.C.