FlowMC/Centrality/MultReader.cxx

#ifndef MULTREADER_CXX
#define MULTREADER_CXX

#include "MultReader.h"

#include <iostream>

MultReader::MultReader(TTree *tree) : BaseReader(tree)
{
}

MultReader::~MultReader()
{
}

void MultReader::LoopMultiplicity(TString outName)
{
    if (fChain == 0) return;

   Long64_t nentries = fChain->GetEntries();

   Long64_t nbytes = 0, nb = 0;
   Int_t refMult, refMultPHENIX;
   TH1F  *hMult = new TH1F("hMult","hMult",2500,0.,2500.);
   TH1F  *hMultPHENIX = new TH1F("hMultPHENIX","hMultPHENIX",2500,0.,2500.);
   for (Long64_t jentry=0; jentry<nentries;jentry++)
   {
        Long64_t ientry = LoadTree(jentry);
        if (ientry < 0) break;
        if (jentry%1000 == 0) 
            std::cout << "Event [" << jentry << "/" 
                << nentries << "]" << std::endl;
        nb = fChain->GetEntry(jentry);   nbytes += nb;
        // if (Cut(ientry) < 0) continue;
        refMult = GetMult();
        refMultPHENIX = GetMultPHENIX();

        if (refMult >= 4)hMult->Fill(refMult);
        if (refMultPHENIX > 0)hMultPHENIX->Fill(refMultPHENIX);
   }
   TFile *fo = new TFile(outName.Data(),"recreate");
   fo->cd();
   hMult->Write();
   hMultPHENIX->Write();
   fo->Close();
}

#endif