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//
// $Id: G4LineSection.hh,v 1.9 2006/06/29 18:22:48 gunter Exp $
// GEANT4 tag $Name: geant4-09-02-cand-01 $
//
//
// class G4LineSection
//
// Class description:
//
// A utility class that calculates the distance of a point from a 
// line section.

// History:
// - Created. J. Apostolakis.
// --------------------------------------------------------------------

#ifndef G4LineSection_hh
#define G4LineSection_hh

#include "G4Types.hh" 
#include "G4ThreeVector.hh"

class G4LineSection
{
  public:  // with description

     G4LineSection( const G4ThreeVector& PntA, const G4ThreeVector& PntB );

     G4double Dist( G4ThreeVector OtherPnt ) const;

     G4double GetABdistanceSq() const { return fABdistanceSq ; }

     static G4double Distline( const G4ThreeVector& OtherPnt, 
                               const G4ThreeVector& LinePntA, 
                               const G4ThreeVector& LinePntB );
  private:

     G4ThreeVector   EndpointA;
     G4ThreeVector   VecAtoB;

     G4double fABdistanceSq ;
};


#endif
