EVE/alice-macros/tpc_hits.C

   1 // $Id$
   2
   3 Reve::PointSet*
   4 tpc_hits(const char *varexp    = "TPC2.fArray.fR:TPC2.fArray.fFi:TPC2.fArray.fZ",
   5          const char *selection = "TPC2.fArray.fR>80",
   6          Option_t *option      = "goff")
   7 {
   8   // Extracts 'major' TPC hits (not the compressed ones).
   9   // This gives ~2.5% of all hits.
  10
  11   AliRunLoader* rl =  Alieve::Event::AssertRunLoader();
  12   rl->LoadHits("TPC");
  13
  14   TTree* ht = rl->GetTreeH("TPC", false);
  15   ht->SetEstimate(400*ht->GetEntries());
  16   ht->Draw(varexp, selection, option);
  17
  18   Reve::PointSet* points =
  19     new Reve::PointSet(Form("TPC Hits '%s'", selection), ht,
  20                        Reve::PointSet::TVT_RPhiZ);
  21   points->SetTitle(Form("N=%d", points->GetN()));
  22   points->SetMarkerColor((Color_t)3);
  23
  24   gReve->AddRenderElement(points);
  25   gReve->DrawRenderElement(points);
  26
  27   return points;
  28 }