CircleFromThreePoints.h

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#ifndef RecoPixelVertexing_PixelTrackFitting_interface_CircleFromThreePoints_h
#define RecoPixelVertexing_PixelTrackFitting_interface_CircleFromThreePoints_h

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/Basic2DVector.h"

class CircleFromThreePoints {
public:

  CircleFromThreePoints(){}

  typedef Basic2DVector<float>   Vector2D;

  CircleFromThreePoints( const GlobalPoint& inner,
             const GlobalPoint& mid,
             const GlobalPoint& outer,
             double precision = 1.e-7);


  float curvature() const { return theCurvature;}

  Vector2D center() const { return theCenter; }

private:

  float    theCurvature;
  Vector2D theCenter;

  void init( const Vector2D& b, const Vector2D& c,
         const Vector2D& offset, double precision);
};

#endif  // RecoPixelVertexing_PixelTrackFitting_interface_CircleFromThreePoints_h