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#ifndef CSCRecHit_CSCSegment_h
#define CSCRecHit_CSCSegment_h
/** \class CSCSegment
* Describes a reconstructed track segment in the 6 layers of a CSC chamber.
* This is 4-dimensional since it has an origin (x,y) and a direction (x,y)
* in the local coordinate system of the chamber.
*
* \author Matteo Sani
* \author Rick Wilkinson
* \author Tim Cox
*/
#include <DataFormats/TrackingRecHit/interface/RecSegment.h>
#include <DataFormats/CSCRecHit/interface/CSCRecHit2DCollection.h>
#include <iosfwd>
class CSCDetId;
class CSCSegment final : public RecSegment {
public:
/// Default constructor
CSCSegment() : theChi2(0.), aME11a_duplicate(false) {}
/// Constructor
CSCSegment(const std::vector<const CSCRecHit2D*>& proto_segment,
LocalPoint origin,
LocalVector direction,
const AlgebraicSymMatrix& errors,
double chi2);
/// Destructor
~CSCSegment() override;
//--- Base class interface
CSCSegment* clone() const override { return new CSCSegment(*this); }
LocalPoint localPosition() const override { return theOrigin; }
LocalError localPositionError() const override;
LocalVector localDirection() const override { return theLocalDirection; }
LocalError localDirectionError() const override;
/// Parameters of the segment, for the track fit in the order (dx/dz, dy/dz, x, y )
AlgebraicVector parameters() const override;
/// Covariance matrix of parameters()
AlgebraicSymMatrix parametersError() const override { return theCovMatrix; }
/// The projection matrix relates the trajectory state parameters to the segment parameters().
AlgebraicMatrix projectionMatrix() const override;
std::vector<const TrackingRecHit*> recHits() const override;
std::vector<TrackingRecHit*> recHits() override;
double chi2() const override { return theChi2; };
int dimension() const override { return 4; }
int degreesOfFreedom() const override { return 2 * nRecHits() - 4; }
//--- Extension of the interface
const std::vector<CSCRecHit2D>& specificRecHits() const { return theCSCRecHits; }
int nRecHits() const { return theCSCRecHits.size(); }
CSCDetId cscDetId() const { return geographicalId(); }
void setDuplicateSegments(std::vector<CSCSegment*>& duplicates);
bool isME11a_duplicate() const { return (!theDuplicateSegments.empty() ? true : false); }
// a copy of the duplicated segments (ME1/1a only)
const std::vector<CSCSegment>& duplicateSegments() const { return theDuplicateSegments; }
bool testSharesAllInSpecificRecHits(const std::vector<CSCRecHit2D>& specificRecHits_1,
const std::vector<CSCRecHit2D>& specificRecHits_2,
CSCRecHit2D::SharedInputType) const;
//bool sharesRecHits(CSCSegment & anotherSegment, CSCRecHit2D::SharedInputType);
// checks if ALL the rechits share the specific input (allWires, allStrips or all)
bool sharesRecHits(const CSCSegment& anotherSegment, CSCRecHit2D::SharedInputType sharesInput) const;
// checks if ALL the rechits share SOME wire AND SOME strip input
bool sharesRecHits(const CSCSegment& anotherSegment) const;
float time() const;
void print() const;
private:
std::vector<CSCRecHit2D> theCSCRecHits;
LocalPoint theOrigin; // in chamber frame - the GeomDet local coordinate system
LocalVector theLocalDirection; // in chamber frame - the GeomDet local coordinate system
AlgebraicSymMatrix theCovMatrix; // the covariance matrix
double theChi2;
bool aME11a_duplicate;
std::vector<CSCSegment> theDuplicateSegments; // ME1/1a only
};
std::ostream& operator<<(std::ostream& os, const CSCSegment& seg);
#endif // CSCRecHit_CSCSegment_h
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