Hello Mark,
Have a look whether this looks "correct"
for you:
http://www4.rcf.bnl.gov/~fine/EventDisplay/
The code is available also.
Valeri
> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]
> On Behalf Of Mark Messier
> Sent: Friday, February 21, 2003 3:44 PM
> To: roottalk@pcroot.cern.ch
> Subject: [ROOT] 3D drawings
>
>
> Hello,
>
> I'm working on an event display for the E907 experiment at FNAL and
was
> wondering if someone could outline the "correct" way to draw a
detector
> geometry and a set of TMarker3D, TPolyMarker3D, TPolyLine3D, and
> TMarker3DBox together on a single pad. Unfortunately my code is a
little
> complicated, but here are the essentials of what I'm doing:
>
> // Once when display is created...
> {
> fFrontView = new TPad("fFrontView","FrontView",x1,y1,x2,y2);
> fFrontViewV = new TView(r1, r2, 1);
> fFrontView->SetView(fFrontViewV);
> fFrontView->Draw();
> }
>
> {
> // For each new event
>
> // Inserting this clear results in a core dump on the second event
> // fFrontView->Clear();
> fFrontView->cd();
>
> // Draw the detector using a TGeoVolume. If I remove the "same" I get
a
> // core dump
> GMIPPGeo::Instance()->Top()->Draw("same");
>
> // Draw collection of markers, lines etc...
> f3DDisp->Draw();
> }
>
> The problem with this is that the TPolyLine3D's do not get cleared
from
> event to event (strangely the markers do get cleared). Seems that the
TPad
> remembers some things but not others. If I try to clear the pad
> (TPad->Clear()) I get a core dump. What am I missing?
>
> Thanks for any help,
> Mark
>
========================================================================
==
> Mark Messier e-mail:
messier@indiana.edu
> Department of Physics
http://www.physics.indiana.edu/~messier
> Indiana University Phone: (812)
855-0236
> Bloomington, IN 47405 Fax: (812)
855-0440
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