DistanceTools.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
 
#include <vector>
#include <string>
#include "TVector3.h"
#include "TMatrixDSym.h"
 
namespace Belle2 {
  namespace DistanceTools {
 
    TVector3 poca(TVector3 const& trackPos, TVector3 const& trackP, TVector3 const& vtxPos);
 
    TVector3 trackToVtxVec(TVector3 const& trackPos, TVector3 const& trackP, TVector3 const& vtxPos);
 
    double trackToVtxDist(TVector3 const& trackPos, TVector3 const& trackP, TVector3 const& vtxPos);
 
    TMatrixDSym trackToVtxCovmat(TVector3 const& trackP,
                                 TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
 
    double trackToVtxDistErr(TVector3 const& trackPos, TVector3 const& trackP, TVector3 const& vtxPos,
                             TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
 
 
    TVector3 vtxToVtxVec(TVector3 const& vtx1Pos, TVector3 const& vtx2Pos);
 
    double vtxToVtxDist(TVector3 const& vtx1Pos, TVector3 const& vtx2Pos);
 
    TMatrixDSym vtxToVtxCovMat(TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
 
    double vtxToVtxDistErr(TVector3 const& vtx1Pos, TVector3 const& vtx2Pos,
                           TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
  }
}