PeriodicGridBase.h

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/*
 * Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
#ifndef TRIGEFMISSINGET_PERIODICGRIDBASE_H
#define TRIGEFMISSINGET_PERIODICGRIDBASE_H
 
#include <cstddef>
#include <utility>
 
namespace HLT
{
  namespace MET
  {
    enum GridDisplacement
    {
      NoDisplacement = 0,
      EtaDisplaced = 1,
      PhiDisplaced = 2,
      EtaPhiDisplaced = 3
    }; //> end enum GridDisplacement
 
    struct GridParameters
    {
      double maxEta{0.};
      std::size_t nEtaTowers{0};
      std::size_t nPhiTowers{0};
      bool displaceEta{false};
      bool displacePhi{false};
      bool operator!=(const GridParameters &other) const;
      bool operator==(const GridParameters &other) const;
      GridDisplacement displacement() const;
    }; //> end struct GridParameters
 
    class PeriodicGridBase
    {
    public:
      class Tower
      {
      public:
        Tower(std::size_t index);
        virtual ~Tower() = default;
 
        virtual const PeriodicGridBase *grid() const = 0;
 
        double towerPhi() const;
 
        double towerEta() const;
 
        std::size_t index() const;
 
        std::size_t etaIndex() const;
 
        std::size_t phiIndex() const;
 
        std::pair<std::size_t, std::size_t> etaPhiIndex() const;
 
      private:
        std::size_t m_index;
      }; //> end class Tower
 
      PeriodicGridBase(const GridParameters &parameters);
 
      PeriodicGridBase(
          double maxEta,
          std::size_t nEtaTowers,
          std::size_t nPhiTowers,
          bool displaceEta = false,
          bool displacePhi = false);
 
      std::size_t getIndex(
          double eta,
          double phi,
          bool &outOfRange) const;
 
      std::size_t getEtaIndex(double eta, bool &outOfRange) const;
 
      std::size_t getPhiIndex(double phi) const;
 
      std::size_t globalIndex(std::size_t iEta, std::size_t iPhi) const;
 
      std::pair<std::size_t, std::size_t> etaPhiIndex(std::size_t index) const;
 
      double centralEta(std::size_t iEta) const;
      double centralPhi(std::size_t iPhi) const;
 
      const GridParameters &parameters() const;
 
      double maxEta() const;
 
      std::size_t nEtaTowers() const;
 
      std::size_t nPhiTowers() const;
 
      std::size_t nTowers() const;
 
      bool displaceEta() const;
 
      bool displacePhi() const;
 
      GridDisplacement displacement() const;
 
      double etaWidth() const;
 
      double phiWidth() const;
 
    private:
      const GridParameters m_params;
    }; //> end class PeriodicGridBase
  }    // namespace MET
} // namespace HLT
 
#endif //> !PUFITUTILS_PERIODICGRIDBASE_H