RpcPatFinder.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef  TRIGL2MUONSA_RPAPATFINDER_H
#define  TRIGL2MUONSA_RPAPATFINDER_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include <string> 
#include <array>
#include <functional> //std::reference_wrapper
 
 
// Original author: Massimo Corradi
 
namespace TrigL2MuonSA {
 
// --------------------------------------------------------------------------------
// --------------------------------------------------------------------------------
struct RpcLayerHits
{
  std::vector<std::vector<double>> hits_in_layer_eta;  
  std::vector<std::vector<double>> hits_in_layer_phi;  
  std::vector<std::vector<double>> hits_in_layer_Z;  
  std::vector<std::vector<double>> hits_in_layer_R; 
  void clear() {
    hits_in_layer_eta.assign(8,std::vector<double> {});
    hits_in_layer_phi.assign(8,std::vector<double> {});
    hits_in_layer_R.assign(8,std::vector<double> {});
    hits_in_layer_Z.assign(8,std::vector<double> {});
  }
};
 
// --------------------------------------------------------------------------------
// --------------------------------------------------------------------------------
 
 
class RpcPatFinder: public AthAlgTool
{
 
 public:
 
  using AthAlgTool::AthAlgTool;
 
 public:
 
  void addHit(const std::string& stationName,
          int stationEta,
          bool  measuresPhi,
          unsigned int  gasGap,
          unsigned int doubletR,
          double gPosX, double gPosY, double gPosZ,
        TrigL2MuonSA::RpcLayerHits& rpcLayerHits) const;
  bool findPatternEta(
    std::array<std::reference_wrapper<double>, 3>& result_aw, 
    std::array<std::reference_wrapper<double>, 3>& result_bw,  
    const TrigL2MuonSA::RpcLayerHits& rpcLayerHits) const;
 
  bool findPatternPhi(double &phi_middle, double &phi_outer, const TrigL2MuonSA::RpcLayerHits& rpcLayerHits) const;
  
 private:
  bool deltaOK(int l1, int l2, double x1, double x2, int isphi, double &delta) const;  
  double calibR(const std::string& stationName, double R, double Phi) const;  
  void abcal(const std::bitset<8>& result_pat, 
             const std::array<size_t, 8>& index, 
             std::array<std::reference_wrapper<double>, 3>& aw, 
             std::array<std::reference_wrapper<double>, 3>& bw,  
             const TrigL2MuonSA::RpcLayerHits& rpcLayerHits) const;
};
 
}
#endif