include/Geant4/G4LineSection.hh

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0024 // ********************************************************************
0025 //
0026 // G4LineSection
0027 //
0028 // Class description:
0029 //
0030 // A utility class that calculates the distance of a point from a
0031 // line section.
0032
0033 // Created: J.Apostolakis, 1999
0034 // --------------------------------------------------------------------
0035
0036 #ifndef G4LineSection_hh
0037 #define G4LineSection_hh
0038
0039 #include "G4Types.hh"
0040 #include "G4ThreeVector.hh"
0041
0042 class G4LineSection
0043 {
0044   public:  // with description
0045
0046      G4LineSection( const G4ThreeVector& PntA,
0047                     const G4ThreeVector& PntB );
0048
0049      G4double Dist( const G4ThreeVector& OtherPnt ) const;
0050
0051      inline G4double GetABdistanceSq() const;
0052
0053      inline static G4double Distline( const G4ThreeVector& OtherPnt,
0054                                       const G4ThreeVector& LinePntA,
0055                                       const G4ThreeVector& LinePntB );
0056   private:
0057
0058      G4ThreeVector EndpointA;
0059      G4ThreeVector VecAtoB;
0060      G4double fABdistanceSq = 0.0;
0061 };
0062
0063 // Inline methods implementations
0064
0065 inline
0066 G4double G4LineSection::GetABdistanceSq() const
0067 {
0068   return fABdistanceSq;
0069 }
0070
0071 inline
0072 G4double G4LineSection::Distline( const G4ThreeVector& OtherPnt,
0073                                   const G4ThreeVector& LinePntA,
0074                                   const G4ThreeVector& LinePntB )
0075 {
0076   G4LineSection LineAB( LinePntA, LinePntB );  // Line from A to B
0077   return LineAB.Dist( OtherPnt );
0078 }
0079
0080 #endif