Tracklet.cxx

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#include "MSVertexUtils/Tracklet.h"
 
#include "TMath.h"  // for TMath::ATan2()
 
Tracklet::Tracklet(const TrackletSegment& ML1seg, const TrackletSegment& ML2seg, const Amg::Vector3D& p,
                   const AmgSymMatrix(5) & ErrorMatrix, float charge)
  : m_ml1seg (ML1seg),
    m_ml2seg (ML2seg),
    m_momentum (p),
    m_pos (ML1seg.globalPosition()),
    m_mdts (ML1seg.mdtHitsOnTrack()),
    m_ErrorMatrix (ErrorMatrix),
    m_charge (charge)
{
    for (unsigned int i = 0; i < m_ml2seg.mdtHitsOnTrack().size(); ++i) m_mdts.push_back(m_ml2seg.mdtHitsOnTrack().at(i));
}
 
Tracklet::Tracklet(const TrackletSegment& ML1seg, const Amg::Vector3D& p, const AmgSymMatrix(5) & ErrorMatrix, float charge)
  : m_ml1seg (ML1seg),
    m_ml2seg (ML1seg),
    m_momentum (p),
    m_pos (ML1seg.globalPosition()),
    m_mdts (ML1seg.mdtHitsOnTrack()),
    m_ErrorMatrix (ErrorMatrix),
    m_charge (charge)
{
}
 
Tracklet::~Tracklet() = default;
 
void Tracklet::momentum(const Amg::Vector3D& p) {
    m_momentum = p;
}
void Tracklet::charge(float charge) {
    m_charge = charge;
}
 
int Tracklet::mdtChamber() const { return m_ml1seg.mdtChamber(); }
int Tracklet::mdtChEta() const { return m_ml1seg.mdtChEta(); }
int Tracklet::mdtChPhi() const { return m_ml1seg.mdtChPhi(); }
const TrackletSegment& Tracklet::getML1seg() const { return m_ml1seg; }
const TrackletSegment& Tracklet::getML2seg() const { return m_ml2seg; }
const Amg::Vector3D& Tracklet::globalPosition() const { return m_pos; }
const Amg::Vector3D& Tracklet::momentum() const { return m_momentum; }
float Tracklet::alpha() const { return TMath::ATan2(m_momentum.perp(), m_momentum.z()); }
float Tracklet::charge() const { return m_charge; }
const AmgSymMatrix(5) & Tracklet::errorMatrix() const { return m_ErrorMatrix; }
float Tracklet::deltaAlpha() const { return (m_ml1seg.alpha() - m_ml2seg.alpha()); }
const std::vector<const Muon::MdtPrepData*>& Tracklet::mdtHitsOnTrack() const { return m_mdts; }