thailand2017/tut_ana_mclist.C

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class RhoCandList;
class RhoCandidate;
class PndAnaPidSelector;
class PndAnaPidCombiner;
class PndAnalysis;

// **** some auxilliary functions in auxtut.C ****
// - FairRunAna* initrun(TString prefix, TString outfile, int min=-1, int max=-1) --> Init FairRunAna
// - plotmyhistos()               --> Plots all histograms in current TDirectory on a autosized canvas
// - writemyhistos()              --> Writes all histos in current TFile 
// - fillM(RhoCandList l, TH1* h) --> Fill mass histogram h with masses of candidates in l
// - RemoveGeoManager()           --> Temporary fix for error on macro exit   
// **** some auxilliary functions in auxtut.C ****
#include "auxtut.C"


void tut_ana_mclist(int nevts = 0, TString prefix = "signal")
{
        // *** some variables
        int i=0,j=0, k=0, l=0;
        gStyle->SetOptFit(1011);
        
        // *** Initialize FairRunAna with defaults      
        TString OutFile="out_dummy.root";  
        FairRunAna* fRun = initrun(prefix, OutFile);
        fRun->Init();
        
        //
        // Now the analysis stuff comes...
        //
        
        
        // *** the data reader object
        PndAnalysis* theAnalysis = new PndAnalysis();
        if (nevts==0) nevts= theAnalysis->GetEntries();
        
        // *** RhoCandLists for the analysis
        RhoCandList mctruth;
        
        // ***
        // the event loop
        // ***
        while (theAnalysis->GetEvent() && i++<nevts)
        {
                cout<<"****** Evt " << i << endl;
                
                // *** the MC Truth objects
                theAnalysis->FillList(mctruth,"McTruth");
                
                //
                // Print MC Truth list with mother-daughter relations
                //
                for (j=0;j<mctruth.GetLength();++j)
                {
                        RhoCandidate *mcmother = mctruth[j]->TheMother();
                  
                        int muid = -1;
                        if (mcmother) muid = mcmother->GetTrackNumber();
                  
                        cout << "Track "<< mctruth[j]->GetTrackNumber()<<" (PDG:"<<mctruth[j]->PdgCode() <<") has mother "<<muid;
                  
                        if (mctruth[j]->NDaughters()>0) cout <<" and daughter(s) ";
                        for (k=0;k<mctruth[j]->NDaughters();++k) cout <<mctruth[j]->Daughter(k)->GetTrackNumber()<<"  ";
                  
                        cout<<endl;
                }
                cout <<endl;
        }
        
        // *** temporaty fix to avoid error on macro exit
        RemoveGeoManager();
}