CDCTangent.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2012 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Oliver Frost                                             *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
#pragma once
 
#include <tracking/trackFindingCDC/eventdata/hits/CDCRLWireHitPair.h>
 
#include <tracking/trackFindingCDC/geometry/ParameterLine2D.h>
#include <tracking/trackFindingCDC/geometry/Vector2D.h>
 
#include <iosfwd>
 
namespace Belle2 {
  namespace TrackFindingCDC {
    class CDCRecoHit2D;
    class CDCRLWireHit;
 
 
    class CDCTangent : public CDCRLWireHitPair {
    public:
      CDCTangent() = default;
 
      explicit CDCTangent(const CDCRLWireHitPair& rlWireHitPair);
 
      CDCTangent(const CDCRLWireHit& fromRLWireHit,
                 const CDCRLWireHit& toRLWireHit);
 
      CDCTangent(const CDCRLWireHitPair& rlWireHitPair,
                 const ParameterLine2D& line);
 
      CDCTangent(const CDCRLWireHit& fromRLWireHit,
                 const CDCRLWireHit& toRLWireHit,
                 const ParameterLine2D& line);
 
      const Vector2D& getFromRecoPos2D() const
      { return getLine().support(); }
 
      Vector2D getFromRecoDisp2D() const;
 
      Vector2D getToRecoPos2D() const
      { return getLine().at(1); }
 
      Vector2D getToRecoDisp2D() const;
 
      const Vector2D& getFlightVec2D() const
      { return getLine().tangential(); }
 
      double getCosFlightDifference(const CDCTangent& tangent) const
      { return getFlightVec2D().cosWith(tangent.getFlightVec2D()); }
 
      CDCRecoHit2D getFromRecoHit2D() const;
 
      CDCRecoHit2D getToRecoHit2D() const;
 
      void adjustLine();
 
      void adjustRLInfo();
 
      void reverse();
 
      CDCTangent reversed() const;
 
      const ParameterLine2D& getLine() const
      { return m_line; }
 
    private:
      ParameterLine2D m_line;
    };
 
    std::ostream& operator<<(std::ostream& output, const CDCTangent& tangent);
  }
}