From Pawel Debski:
[u/mrichter/AliRoot.git] / EVE / alice-macros / its_hits.C
1 // $Id$
2 // Main authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
3
4 /**************************************************************************
5  * Copyright(c) 1998-2008, ALICE Experiment at CERN, all rights reserved. *
6  * See http://aliceinfo.cern.ch/Offline/AliRoot/License.html for          *
7  * full copyright notice.                                                 *
8  **************************************************************************/
9
10 TEvePointSet*
11 its_hits(const char *varexp    = "fX:fY:fZ",
12          const char *selection = "",
13          TEveElement* cont = 0)
14 {
15   AliRunLoader* rl =  AliEveEventManager::AssertRunLoader();
16   rl->LoadHits("ITS");
17
18   TTree* ht = rl->GetTreeH("ITS", false);
19
20   TEvePointSet* points = new TEvePointSet(Form("SIM Hits ITS '%s'", selection));
21
22   TEvePointSelector ps(ht, points, varexp, selection);
23   // ps.SetSubIdExp("fTrack:fStatus");
24   ps.Select();
25
26   if(points->Size() == 0 && gEve->GetKeepEmptyCont() == kFALSE) {
27     Warning("its_hits", Form("No hits match '%s'", selection));
28     delete points;
29     return 0;
30   }
31
32   points->SetTitle(Form("N=%d", points->Size()));
33
34   points->SetName("ITS Hits"));
35   const TString viz_tag("SIM Hits ITS");
36   points->ApplyVizTag(viz_tag, "Hits");
37
38   gEve->AddElement(points, cont);
39   gEve->Redraw3D();
40
41   return points;
42 }