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 <framework/geometry/B2Vector3.h>
#include "TMatrixDSym.h"
 
namespace Belle2 {
  namespace DistanceTools {
 
    ROOT::Math::XYZVector poca(ROOT::Math::XYZVector const& trackPos, ROOT::Math::XYZVector const& trackP,
                               ROOT::Math::XYZVector const& vtxPos);
 
    B2Vector3D trackToVtxVec(B2Vector3D const& trackPos, B2Vector3D const& trackP, B2Vector3D const& vtxPos);
 
    double trackToVtxDist(B2Vector3D const& trackPos, B2Vector3D const& trackP, B2Vector3D const& vtxPos);
 
    TMatrixDSym trackToVtxCovmat(B2Vector3D const& trackP,
                                 TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
 
    double trackToVtxDistErr(B2Vector3D const& trackPos, B2Vector3D const& trackP, B2Vector3D const& vtxPos,
                             TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
 
 
    B2Vector3D vtxToVtxVec(B2Vector3D const& vtx1Pos, B2Vector3D const& vtx2Pos);
 
    double vtxToVtxDist(B2Vector3D const& vtx1Pos, B2Vector3D const& vtx2Pos);
 
    TMatrixDSym vtxToVtxCovMat(TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
 
    double vtxToVtxDistErr(B2Vector3D const& vtx1Pos, B2Vector3D const& vtx2Pos,
                           TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
  }
}