FPGATrackSimLLPRoadFilterTool.h

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// Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
 
#ifndef FPGATrackSim_LLPROADFILTERTOOL_H
#define FPGATrackSim_LLPROADFILTERTOOL_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "FPGATrackSimObjects/FPGATrackSimTrack.h"
#include "FPGATrackSimObjects/FPGATrackSimHit.h"
 
#include <string>
#include <vector>
 
class FPGATrackSimLLPRoadFilterTool : public AthAlgTool {
public:
  FPGATrackSimLLPRoadFilterTool (const std::string& algname, const std::string& name, const IInterface* ifc);
 
  StatusCode filterUsedHits(std::vector<FPGATrackSimTrack> &tracks, 
                const std::vector<const FPGATrackSimHit*>& allHits, 
                std::vector<const FPGATrackSimHit*>& unusedHits );
 
private:
    // Make a list of all hits used in any track
    struct HitCompare {
        bool operator()(const FPGATrackSimHit* a, const FPGATrackSimHit* b) const { 
            auto hash_a = a->getIdentifierHash();
            auto hash_b = b->getIdentifierHash();
            if ( hash_a == hash_b ) {
                auto phi_a = a->getPhiCoord();
                auto phi_b = b->getPhiCoord();
                if ( phi_a == phi_b ) {
                    auto eta_a = a->getEtaCoord();
                    auto eta_b = b->getEtaCoord();
                    if ( eta_a == eta_b) {
                        auto layer_a = a->getLayer();
                        auto layer_b = b->getLayer();
                        return layer_a < layer_b;
                    }
                    return eta_a < eta_b;
                }
                return phi_a < phi_b;
            }
            return hash_a <  hash_b; 
        }
    };
 
};
 
#endif