Re: drawing TNode in TPad

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed May 26 1999 - 09:01:11 MEST 

Hi Rutger,
You can set the TView parameters to control the orientation of the
picture
on the screen. Below, you will find two functions extracted from ATLFast
illustrating how to set these parameters.

Rene Brun


//_____________________________________________________________________________
void ATLFDisplay::DrawAllViews()
{
//    Draw front,top,side and 30 deg views

   m_DrawAllViews = kTRUE;
   m_Pad->cd();
   m_Pad->SetFillColor(15);
   m_Pad->Clear();
   m_Pad->Divide(2,2);

   // draw 30 deg view
   m_Pad->cd(1);
   DrawView(30, 30);
   DrawTitle();

   // draw front view
   m_Pad->cd(2);
   DrawView(0, -90);
   DrawTitle("Front");

   // draw top view
   m_Pad->cd(3);
   DrawView(90, -90);
   DrawTitle("Top");

   // draw side view
   m_Pad->cd(4);
   DrawView(90, 0);
   DrawTitle("Side");

   m_Pad->cd(2);
}
//_____________________________________________________________________________
void ATLFDisplay::DrawView(Float_t theta, Float_t phi)
{
//    Draw a view of ATLAS

   gPad->SetFillColor(1);
   // Display ATLAS outline
   gPad->Clear();

   Int_t iret;
   TView *view = new TView(1);
   view->SetRange(-m_Rin, -m_Rin, -m_Zin, m_Rin, m_Rin, m_Zin);

   m_Nodin->Draw("same");

    // add itself to the list
   AppendPad();
   
   //Loop on all makers to add their products to the pad
   TIter next(gATLFast->Makers());
   ATLFMaker *maker;
   while ((maker = (ATLFMaker*)next())) {
      maker->Draw();
   }
   view->SetView(phi, theta, 0, iret);
}




Rutger van der Eijk wrote:
> 
> Hi rooters,
> 
> When a TNode is drawn in a TPad the z-axis is always orientated 'up' (i.e.
> to the top of my screen). However I would like the z-axis to be horizontal
> (i.e. along a beam-axis). Is there an option to change this 'default'
> orientation?
> 
> (I could define a mother volume around the TNode and have the child TNode
> orientated such that Z becomes horizontal. However I don't want this
> because I want to use the same event display to draw sub-parts of the
> detector (i.e. child TNodes, child/child TNodes etc...), which would mean
> defining these extra TNodes for every sub node...)
> 
> Thanks,
> 
> Rutger van der Eijk

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