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#ifndef DataFormats_TrackerRecHit2D_VectorHit2D_h
#define DataFormats_TrackerRecHit2D_VectorHit2D_h
#include "DataFormats/GeometryVector/interface/LocalVector.h"
#include "DataFormats/GeometryVector/interface/LocalPoint.h"
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"
#include "DataFormats/GeometrySurface/interface/LocalError.h"
//Stores geometric information about VectorHits, their convariance matrix and chi2 of the compatability of the two hits
class VectorHit2D {
public:
VectorHit2D() : thePosition(), theDirection(), theCovMatrix(), theChi2() {}
VectorHit2D(const LocalPoint& pos, const LocalVector& dir, const AlgebraicSymMatrix22& covMatrix, const double& chi2)
: thePosition(pos),
theDirection(dir),
theCovMatrix(covMatrix),
theLocalError(theCovMatrix[0][0], theCovMatrix[0][1], theCovMatrix[1][1]),
theChi2(chi2) {}
const LocalPoint& localPosition() const { return thePosition; }
const LocalVector& localDirection() const { return theDirection; }
const LocalError& localDirectionError() const { return theLocalError; }
const AlgebraicSymMatrix22& covMatrix() const { return theCovMatrix; }
float chi2() const { return theChi2; }
int dimension() const { return theDimension; }
private:
LocalPoint thePosition;
LocalVector theDirection;
AlgebraicSymMatrix22 theCovMatrix;
LocalError theLocalError;
float theChi2;
static constexpr int theDimension = 2;
};
#endif
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