CaloCellSelectorLayerdR.h

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/

// CaloCellSelectorLayerdR.h, (c) ATLAS Detector software
#ifndef CALOCELLSELECTORLAYERDR_H
#define CALOCELLSELECTORLAYERDR_H
 
#include "GeoPrimitives/GeoPrimitives.h"
#include "RecoToolInterfaces/ICaloCellSelector.h"
#include "TrkCaloExtension/CaloExtensionHelpers.h"
#include "TrkParametersIdentificationHelpers/TrackParametersIdHelper.h"
#include "xAODCaloEvent/CaloCluster.h"
 
namespace Trk {
 
    // Recode of original method by TrackInCaloTools to select calo cells around track
    // get mid point for each calo layer from the entry & exit point
    // for each layer's mid point select calo cell within dR in the SAME layer
    // Fast (?) but
    // 1. may miss calo cell at another layer which nevertheless is close to the crossing
    // 2. current implementation will fail in case where there's multiple entry to a calo layer
 
    class CaloCellSelectorLayerdR : public ICaloCellSelector {
    public:
        CaloCellSelectorLayerdR(double coneSize);
        ~CaloCellSelectorLayerdR();
 
        void setConeSize(double coneSize) { m_coneSize2 = coneSize * coneSize; }
 
        bool preSelectAction(const Trk::CaloExtension& caloExtension);
        bool preSelectAction(const xAOD::CaloCluster& caloCluster);
        bool select(const CaloCell& cell) const;  // select or reject the cell
 
    private:
        CaloExtensionHelpers::EtaPhiHashLookupVector m_midPoints;
        double m_coneSize2;
        // TrackParametersIdHelper  parsIdHelper;
    };
}  // namespace Trk
 
#endif