GsfTangent.h

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#ifndef GsfTrackReco_GsfTangent_h
#define GsfTrackReco_GsfTangent_h

#include "DataFormats/Math/interface/Vector3D.h"
#include "DataFormats/Math/interface/Point3D.h"
#include "DataFormats/Math/interface/Vector.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"

namespace reco {

  class GsfTangent {
  public:
    GsfTangent () :
      position_(0.,0.,0.), momentum_(0.,0.,0.),
      deltaP_(0.), sigDeltaP_(0.) {}
    GsfTangent (const math::XYZPoint& position,
        const math::XYZVector& momentum,
        const Measurement1D& deltaP) :
      position_(position), momentum_(momentum) {
      deltaP_ = deltaP.value();
      sigDeltaP_ = deltaP.error();
    }
    const math::XYZPoint& position () const {return position_;}
    const math::XYZVector& momentum () const {return momentum_;}
    Measurement1D deltaP () const {
      return Measurement1D(deltaP_,sigDeltaP_);
    }

  private:
    math::XYZPoint position_;
    math::XYZVector momentum_;
    double deltaP_;
    double sigDeltaP_;
  };
}
#endif