NswClusteringUtils.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
#ifndef MUONPREPRAWDATA_NSWCLUSTERING_UTILS_H
#define MUONPREPRAWDATA_NSWCLUSTERING_UTILS_H
 
#include "MuonPrepRawData/MuonCluster.h"
#include "TrkSurfaces/Surface.h"

namespace Muon {
    namespace NswClustering {
        inline Amg::Vector3D toLocal(const Amg::Transform3D& toLocalTrans, const Amg::Vector3D& dir) {
            Amg::Rotation3D rotMat{toLocalTrans.linear()};
            const Amg::Vector3D rotDir = rotMat * dir;
            return Amg::Vector3D{rotDir.x(), rotDir.y(), std::abs(rotDir.z())};
        }
 
        inline Amg::Vector3D toLocal(const Trk::Surface& surf, const Amg::Vector3D& dir){
            Amg::Rotation3D rotMat{surf.transform().inverse().linear()};
            const Amg::Vector3D rotDir = rotMat * dir;
            return Amg::Vector3D{rotDir.x(), rotDir.y(), std::abs(rotDir.z())};
        }
        inline Amg::Vector3D toLocal(const MuonCluster& prd,const Amg::Vector3D& dir){
            return toLocal(prd.detectorElement()->surface(prd.identify()), dir);
        }
        inline Amg::Vector3D toLocal(const MuonCluster& prd) {
            return toLocal(prd, prd.globalPosition().unit());
        }
    }
}
#endif