G4ErrorFreeTrajParam.hh

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00027 // $Id: G4ErrorFreeTrajParam.hh 69766 2013-05-14 14:33:55Z gcosmo $
00028 //
00029 // Class Description:
00030 //
00031 // Holds the 5 independent variables of the trajectory for a
00032 // G4ErrorFreeTrajState object. It is not used for anything but for
00033 // printing, but anyhow it is updated everytime the position and
00034 // momentum are updated.
00035 
00036 // History:
00037 // - Created: Pedro Arce, September 2004
00038 // --------------------------------------------------------------------
00039 
00040 #ifndef G4ErrorFreeTrajParam_hh
00041 #define G4ErrorFreeTrajParam_hh
00042 
00043 #include "G4Point3D.hh"
00044 #include "G4Vector3D.hh"
00045 
00046 #include "globals.hh"
00047 #include "G4Track.hh"
00048 
00049 class G4ErrorFreeTrajParam
00050 {
00051  public:  // with description
00052 
00053   G4ErrorFreeTrajParam()
00054    : fInvP(0.), fLambda(0.), fPhi(0.), fYPerp(0.), fZPerp(0.){}
00055   G4ErrorFreeTrajParam( const G4Point3D& pos, const G4Vector3D& mom );
00056     // build parameters from position and momentum
00057 
00058   virtual ~G4ErrorFreeTrajParam(){}
00059 
00060   void Update( const G4Track* aTrack );
00061     // update parameters from G4Track
00062 
00063   friend
00064     std::ostream& operator<<(std::ostream&, const G4ErrorFreeTrajParam& ts);
00065   
00066   // Set and Get methods 
00067 
00068   void SetParameters( const G4Point3D& pos, const G4Vector3D& mom );
00069 
00070   G4Vector3D GetDirection() const { return fDir;}
00071 
00072   G4double GetInvP() const { return fInvP; }
00073   G4double GetLambda() const { return fLambda; }
00074   G4double GetPhi() const { return fPhi; }
00075   G4double GetYPerp() const { return fYPerp; }
00076   G4double GetZPerp() const { return fZPerp; }
00077 
00078  private:
00079 
00080   G4Vector3D fDir; //direction to which YPerp, ZPerp refer
00081   G4double fInvP; // inverse of momentum
00082   G4double fLambda; // 90 - theta angle of direction
00083   G4double fPhi; // phi angle of direction
00084   G4double fYPerp; // Y coordinate
00085   G4double fZPerp; // Z coordinate
00086 };
00087 
00088 #endif

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