/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/PhotonVertexSelection/PhotonVertexSelection/PhotonVertexHelpers.h

#ifndef PhotonVertexSelection_PhotonVertexHelpers_H
#define PhotonVertexSelection_PhotonVertexHelpers_H

// EDM includes
#include "xAODTracking/VertexContainerFwd.h"
#include "xAODTracking/TrackParticleFwd.h"
#include "xAODEgamma/PhotonContainer.h"
#include "xAODEgamma/EgammaContainer.h"
#include "xAODEventInfo/EventInfo.h"

// ROOT includes
#include "TLorentzVector.h"

class ShowerDepthTool;

namespace xAOD {
  namespace PVHelpers {

    std::pair<float, float> getZCommonAndError(const xAOD::EventInfo *eventInfo,
                                               const xAOD::EgammaContainer *egammas,
                                               float convPtCut = 2e3);

    float getVertexSumPt(const xAOD::Vertex *vertex, int power = 1, bool useAux = true);

    TLorentzVector getVertexMomentum(const xAOD::Vertex *vertex, bool useAux = true, std::string derivationPrefix = "");

    const xAOD::Vertex* getHardestVertex(const xAOD::VertexContainer *vertices);

    TLorentzVector getTrackAtFirstMeasurement(const xAOD::TrackParticle *tp);

    bool passConvSelection(const xAOD::Photon *photon,
                           float convPtCut = 2e3);

    bool passConvSelection(const xAOD::Vertex& conversionVertex,
                           size_t i,
                           float convPtCut);

  }
}


#endif // PhotonVertexSelection_PhotonVertexHelpers_H

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