CSCSegAlgoTC.h

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#ifndef CSCSegment_CSCSegAlgoTC_h
#define CSCSegment_CSCSegAlgoTC_h

#include <RecoLocalMuon/CSCSegment/src/CSCSegmentAlgorithm.h>

#include <DataFormats/CSCRecHit/interface/CSCRecHit2D.h>

#include <deque>
#include <vector>

class CSCSegFit;

class CSCSegAlgoTC : public CSCSegmentAlgorithm {
public:
  typedef std::vector<int> LayerIndex;
  typedef std::vector<const CSCRecHit2D*> ChamberHitContainer;
  typedef ChamberHitContainer::const_iterator ChamberHitContainerCIt;

  // We need to be able to flag a hit as 'used' and so need a container
  // of bool's. Naively, this would be vector<bool>... but AVOID that since it's
  // non-standard i.e. packed-bit implementation which is not a standard STL container.
  // We don't need what it offers and it could lead to unexpected trouble in the future

  typedef std::deque<bool> BoolContainer;

  explicit CSCSegAlgoTC(const edm::ParameterSet& ps);
  ~CSCSegAlgoTC() override{};

  std::vector<CSCSegment> buildSegments(const ChamberHitContainer& rechits);

  std::vector<CSCSegment> run(const CSCChamber* aChamber, const ChamberHitContainer& rechits) override;

private:

  bool addHit(const CSCRecHit2D* aHit, int layer);
  bool replaceHit(const CSCRecHit2D* h, int layer);
  void compareProtoSegment(const CSCRecHit2D* h, int layer);
  void increaseProtoSegment(const CSCRecHit2D* h, int layer);

  bool areHitsCloseInLocalX(const CSCRecHit2D* h1, const CSCRecHit2D* h2) const;

  bool areHitsCloseInGlobalPhi(const CSCRecHit2D* h1, const CSCRecHit2D* h2) const;

  bool hasHitOnLayer(int layer) const;

  bool isHitNearSegment(const CSCRecHit2D* h) const;

  void dumpHits(const ChamberHitContainer& rechits) const;

  void tryAddingHitsToSegment(const ChamberHitContainer& rechits,
                              const ChamberHitContainerCIt i1,
                              const ChamberHitContainerCIt i2);

  bool isSegmentGood(std::vector<CSCSegFit*>::iterator is,
                     const ChamberHitContainer& rechitsInChamber,
                     BoolContainer& used) const;

  void flagHitsAsUsed(std::vector<CSCSegFit*>::iterator is,
                      const ChamberHitContainer& rechitsInChamber,
                      BoolContainer& used) const;

  void pruneTheSegments(const ChamberHitContainer& rechitsInChamber);
  void segmentSort(void);

  float phiAtZ(float z) const;

  void updateParameters(void);

  void dumpSegment(const CSCSegment& seg) const;

  // ================

  const CSCChamber* theChamber;

  ChamberHitContainer proto_segment;

  // Pointer to most recent candidate fit
  CSCSegFit* sfit_;

  // Store pointers to set of candidate fits
  std::vector<CSCSegFit*> candidates;

  float chi2Max;

  float chi2ndfProbMin;

  float dRPhiFineMax;

  float dPhiFineMax;

  float dRPhiMax;

  float dPhiMax;

  int minLayersApart;

  int SegmentSorting;

  const std::string myName;
  bool debugInfo;
};

#endif