T0Fit.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#include <TString.h>  // for Form
 
#include "MdtCalibT0/T0MTHistos.h"
#include "TClass.h"
#include "TDirectory.h"
#include "TFile.h"
#include "TH1.h"
#include "TKey.h"
#include "TObject.h"
#include "TROOT.h"
#include <cstdlib>
#include <iostream>
#include <string>
 
using namespace MuonCalib;
 
int main(int argc, char *argv[]) {
    // check command line arguments
    if (argc != 3) {
      std::cerr << Form("File: %s, Line: %d\nT0Fit::main() - Usage: %s <input file> <output file>!", __FILE__, __LINE__, argv[0]);
      return 1;
    }
 
    TROOT wurscht("wurscht", "wurscht");
    TFile infile(argv[1]);
    TDirectory *dir = &infile;
    TFile outfile(argv[2], "RECREATE");
    T0MTSettings settings;
    settings.AddFitfun() = true;
    settings.DrawDebugGraphs() = true;
    if (!dir) {
        throw std::runtime_error(
            Form("File: %s, Line: %d\nT0Fit::main() - Cannot find TDirectory 'MT_t0_fitter' in file %s!", __FILE__, __LINE__, argv[1]));
    }
    // loop on all histograms
    TIter nextkey(dir->GetListOfKeys());
    TKey *key;
    int n = 0;
    while ((key = (TKey *)nextkey())) {
        TObject *obj = key->ReadObj();
        if (obj->IsA()->InheritsFrom("TH1F")) {
            TH1F *hist = dynamic_cast<TH1F *>(obj);
            if (hist == NULL) continue;
            string hname = hist->GetName();
            if (hname == "t_spec_Summary") continue;
            hist->GetListOfFunctions()->Clear();
            T0MTHistos fitter;
            fitter.SetTSpec(n, hist, &settings);
            n++;
            if (fitter.FitT0()) { fitter.FitTmax(); }
        }
    }
    outfile.Write();
}