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[u/mrichter/AliRoot.git] / DISPLAY / display2.C

// This macro displays the hits belonging to a track for selected detectors
// Input: in the tracks contains the interesting tracks
//        ntracks is the number of interesing tracks
//        The default values correspond to "Show everything"
// Note: For the moment it works only with HIJING events, the PYTHIA is
//       still not supported
//#include <ClassTable.h>

void display2(const char *filename="galice.root", Int_t nevent=0,
              Int_t *tracks=0, Int_t ntracks=0)
{
   // Dynamically link some shared libs
   if (gClassTable->GetID("AliRun") < 0) {
      gROOT->LoadMacro("loadlibs.C");
      loadlibs();
   } else {
      delete gAlice->GetRunLoader();
      delete gAlice;
      gAlice = 0;
   }
   //gSystem->Load("libAliL3Src");
   gSystem->Load("libDISPLAY");

   // Connect the ROOT Galice file containing Geometry, Kine and Hits
   AliRunLoader *rl = 0;
   TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject(filename);
   if(file) {
      Info("display2.C", "galice.root is already open");
   }
   rl = AliRunLoader::Open(filename, "DISPLAYED EVENT");

   if (rl == 0) {
      Error("display2.C", "can not get Run Loader, exiting...");
      return;
   }

   // Get AliRun object from file or create it if not on file
   rl->LoadgAlice();

   gAlice = rl->GetAliRun();
   if (!gAlice) {
      Error("display2.C", "AliRun object not found on file, exiting...");
      return;
  }

   // Create Event Display object
   AliDisplay2 *edisplay = new AliDisplay2(gClient->GetRoot(), 900, 700);
   // if (ntracks > 0) edisplay->SetTracksToDisplay(tracks, ntracks);

   // Display the requested event
   rl->GetEvent(nevent);
   rl->LoadKinematics();
   rl->LoadHeader();
   rl->LoadHits();

   //edisplay->FindModules();
   edisplay->ShowNextEvent(0);
}