BmnFunctionAna.h

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#ifndef BMNFUNCTIONANA_H
#define BMNFUNCTIONANA_H 1
 
#include "FairField.h"
#include "TString.h"
 
/** Class with static common functions to simplify experiment code **/
class BmnFunctionAna
{
  public:
    // get magnetic field and run information from a specified DST file
    // fileName: DST file path [in]
    // fieldScale: magnetic field scale [out]; fieldType: magnetic field type [out]
    // beam, target: names of the beam and target, e.g. 'Xe' and 'CsI (2%)' [out, optional]
    // beam_energy: beam kinetic energy per nucleon in AGeV [out, optional]
    // beam_a, beam_z, target_a, target_z: mass and charge numbers of the beam and target nuclei [out, optional]
    // NB: the names are empty and A and Z are equal to -1 if the nucleus was not defined at the reconstruction stage,
    // target A is equal to 0 if the empty target
    // returns magnetic field, nullptr - if some errors occured
    static FairField* GetDSTField(TString fileName,
                                  Double_t& fieldScale,
                                  Int_t& fieldType,
                                  TString* beam = nullptr,
                                  TString* target = nullptr,
                                  Double_t* beam_energy = nullptr,
                                  Int_t* beam_a = nullptr,
                                  Int_t* beam_z = nullptr,
                                  Int_t* target_a = nullptr,
                                  Int_t* target_z = nullptr);
 
    // write the reconstructed global tracks from the simulated DST files to a text file, one track per line: the event
    // number, the parameters and the covariance matrices of the track at its first and last points, chi2, NDF, length,
    // number of hits, velocities measured by ToF-400 and ToF-700, DCA to the primary vertex and the PDG code of the
    // matched MC particle. Only the tracks with a velocity measured by ToF and matched to an MC track are written, and
    // only from the events with a primary vertex reconstructed from more than one track
    // input_list_file: text file with the paths of the DST files, one per line [in]
    // output_file: path of the text file to be written [in]
    // configFileName: JSON file with the selection settings, not used yet [in]
    // returns 0 (also if the list of the input files is empty)
    static int ConvertRecoToTxt(TString input_list_file,
                                TString output_file = "reco_tracks.txt",
                                TString configFileName = "recotxt_config.json");
 
  private:
    BmnFunctionAna() {}
    ~BmnFunctionAna() {}
 
    ClassDef(BmnFunctionAna, 1)
};
 
#endif