EVE/alice-macros/t0_hits.C

   1 // $Id$
   2
   3 Reve::PointSet*
   4 t0_hits(const char *varexp    = "T0.fX:T0.fY:T0.fZ",
   5          const char *selection = "")
   6 {
   7   // Extracts  T0 hits.
   8
   9
  10   AliRunLoader* rl =  Alieve::Event::AssertRunLoader();
  11   rl->LoadHits("T0");
  12
  13   TTree* ht = rl->GetTreeH("T0", false);
  14
  15   Int_t nTracks = ht->GetEntries();
  16   // printf("Found %d tracks. \n",nTracks);
  17   for (Int_t it = 0; it < nTracks; it++) {
  18
  19     TClonesArray *hits = 0;
  20     ht->SetBranchAddress("T0",&hits);
  21
  22     ht->GetEvent(it);
  23  Int_t nHits = hits->GetEntriesFast();
  24  //  printf("Found %d hits in track %d. \n",nHits,it);
  25
  26   }
  27   Reve::PointSet* points = new Reve::PointSet(Form("T0 Hits '%s'", selection));
  28    points->SetSourceCS(TPointSelectorConsumer::TVT_XYZ);
  29
  30   TPointSelector ps(ht, points, varexp, selection);
  31   ps.Select();
  32
  33   points->SetTitle(Form("N=%d", points->Size()));
  34   points->SetMarkerSize(.5);
  35   points->SetMarkerColor((Color_t)3);
  36
  37   gReve->AddRenderElement(points);
  38   gReve->Redraw3D();
  39
  40   return points;
  41 }