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// Author: Dariusz Miskowiec <mailto:d.miskowiec@gsi.de> 2007

//=============================================================================
// event global variable analyzer
// Histogram the event variables like multiplicity, flow vector, vertex z, 
// etc. 
//=============================================================================

#include <TROOT.h>
#include <TH1.h>
#include <TH2.h>
#include "AliUnicorEvent.h"
#include "AliUnicorAnalGlobal.h"

class TH2;
ClassImp(AliUnicorAnalGlobal)
  
//=============================================================================
AliUnicorAnalGlobal::AliUnicorAnalGlobal(const char *nam) : AliUnicorAnal(nam) 
{
  // constructor

  TH1D *mult = new TH1D("mult","mult",5000,-0.5,4999.5);
  mult->SetXTitle("multiplicity");
  TH1D *cent = new TH1D("cent","cent",100,0,1);
  cent->SetXTitle("centrality");
  TH2D *cemu = new TH2D("cemu","cemu",100,0,1,5000,-0.5,4999.5);
  cemu->SetXTitle("centrality");
  cemu->SetYTitle("Nch");
  TH2D *dire = new TH2D("dire","dire",160,-40,40,160,-40,40);
  dire->SetXTitle("Qx (GeV)");
  dire->SetYTitle("Qy (GeV)");
  TH1D *zver = new TH1D("zver","zver",120,-1.2,1.2);
  zver->SetXTitle("normalized z-vertex");
  fHistos.Add(mult);
  fHistos.Add(cent);
  fHistos.Add(cemu);
  fHistos.Add(dire);
  fHistos.Add(zver);
  gROOT->cd();
}
//=============================================================================
void AliUnicorAnalGlobal::Process(AliUnicorEvent *ev) const
{
  // fill event variable histograms

  TH1D *mult = (TH1D*) fHistos.At(0);
  TH1D *cent = (TH1D*) fHistos.At(1);
  TH2D *cemu = (TH2D*) fHistos.At(2);
  TH2D *dire = (TH2D*) fHistos.At(3);
  TH1D *zver = (TH1D*) fHistos.At(4);

  double n = ev->NGoodParticles();
  mult->Fill(n,1.0);
  cent->Fill(ev->Centrality(),1.0);
  cemu->Fill(ev->Centrality(),n);
  Double_t qx=0,qy=0;
  ev->RP(qx,qy);
  dire->Fill(qx,qy,1.0);
  zver->Fill(ev->Zver(),1.0);
}
//=============================================================================