T2TrackManager.h

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

 
#ifndef TRIGT2BEAMSPOT_T2TRACKMANAGER_H
#define TRIGT2BEAMSPOT_T2TRACKMANAGER_H
 
#include "TrkTrack/TrackCollection.h"
#include "AthContainers/ConstDataVector.h"
 
#include <vector>
#include <cmath>
 
namespace PESA
{
  
  class T2TrackManager
  {
  public:
 
    using TrackVector = std::vector<const Trk::Track*>;
 
    // List of the splitter algorithms
    // TODO: Only Alternating split works, Pt does things that look strange
    //   and it should be validated before it can be used.
    enum Algorithm { Alternating, Pt /*, Phi, NorthSouth, Charge */ };
 
    explicit T2TrackManager(int nSplit=2, Algorithm alg=Alternating) : m_nSplit(nSplit), m_alg(alg) {}
 
    // Return a vector of sub-clusters
    std::vector<TrackVector> split(const TrackVector& cluster, const EventContext& ctx) const;
 
  private:
    
    // The splitter algorithms
    int alternatingSplit(int& key) const;         // 1 for me, 1 for you, 2 for me, ...
    int orderedSplit(int& key, int nEntries) const; // 1, 2, 3 for me, 1, 2, 3 for you ...
    
    const int m_nSplit = 2;      // How many output clusters
    const int m_alg = Alternating;         // Which algorithm to use
  };
 
} //PESA
 
#endif