RhoCalculationTools.h

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//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

#ifndef RHOCALCULATIONTOOLS_H
#define RHOCALCULATIONTOOLS_H
//                                                                      //
// RhoCalculationTools                                                  //
//                                                                      //
// Toolset to calculate things centrally.                               //
//   - Magnetic Field Access                                            //
//                                                                      //
// Authors:                                                             //
// Ralf Kliemt, HIM/GSI Feb.2013                                        //
//                                                                      //

#include "RhoCandidate.h"

#include "TVector3.h"
#include "TLorentzVector.h"
#include "TMatrixD.h"
#include "TMatrixDSym.h"
#include "RhoError.h"

class RhoCalculationTools {
 public:
  static void SetVerbose(Int_t level) { fVerbose = level; }

  static Double_t GetBz(const TVector3 &position);

  static void ForceConstantBz(Double_t bz = 0.)
  {
    fBz = bz;
    fBzSet = kTRUE;
  };
  static void UnForceConstantBz() { fBzSet = kFALSE; };

  /**********************************************************
   Description: Class PndAnaCovTool
   Taken from Base class for particles used for Vertex fitting
   Authors: Dipak K. Mishra
            R. Kliemt (taking away the cov converters)
  ***********************************************************/
  static TMatrixDSym GetConverted6(TMatrixDSym);
  static TMatrixD GetConverted6(TMatrixD);
  static TMatrixD GetConverted7(TMatrixD);
  static TMatrixDSym GetCovMat(TMatrixD);
  static TMatrixDSym GetCovMat1(TMatrixD);
  static TMatrixDSym GetFitError(TMatrixDSym);
  static TMatrixD GetFitError(TLorentzVector, TMatrixD);

  //    static Bool_t FillHelixParams(RhoCandidate* cand, Bool_t skipcov=kFALSE);
  static Bool_t
  P7toHelix(const TVector3 &pos, const TLorentzVector &p4, const Double_t Q, const TMatrixD &cov77, Float_t *helixparams, TMatrixD &helixCov, Bool_t skipcov = kFALSE);
  static Bool_t P7toPRG(const TVector3 &pos, const TLorentzVector &p4, const Double_t Q, const TMatrixD &cov77, const TVector3 &expPoint, Float_t *helixparams, TMatrixD &helixCov,
                        TMatrixD &jacobian, Bool_t skipcov = kFALSE);
  //    static Bool_t SDtoHelix(FairTrackParH* par, RhoCandidate* cand, Bool_t skipcov=kFALSE);
  static Bool_t P6FromTrajectory(TVectorD &mom6, TMatrixDSym &cov6, RhoCandidate *cand, double z, double ztolerance);
  static Double_t StateFromTrajectory(TVectorD &state, TMatrixDSym &cov, RhoCandidate *track, double vx, double vy, double vz, double ztolerance);

  static void TransportToZ(RhoCandidate *cand, Double_t z = 0);
  static void PrintMatrix(TMatrixT<double> m);
  static void PrintMatrix(TMatrixTSym<double> m);
  static void PrintMatrix(RhoError m);

 private:
  static std::ostream &bold_on(std::ostream &os) { return os << "\e[1m"; }

  static std::ostream &bold_off(std::ostream &os) { return os << "\e[0m"; }

  RhoCalculationTools();
  ~RhoCalculationTools();

  static Double_t fBz;
  static Int_t fVerbose;
  static Bool_t fBzSet;
};

#endif