include/Geant4/G4ErrorFreeTrajParam.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0024 // ********************************************************************
0025 //
0026 //
0027 //
0028 // Class Description:
0029 //
0030 // Holds the 5 independent variables of the trajectory for a
0031 // G4ErrorFreeTrajState object. It is not used for anything but for
0032 // printing, but anyhow it is updated everytime the position and
0033 // momentum are updated.
0034
0035 // History:
0036 // - Created: Pedro Arce, September 2004
0037 // --------------------------------------------------------------------
0038
0039 #ifndef G4ErrorFreeTrajParam_hh
0040 #define G4ErrorFreeTrajParam_hh
0041
0042 #include "G4Point3D.hh"
0043 #include "G4Vector3D.hh"
0044
0045 #include "globals.hh"
0046 #include "G4Track.hh"
0047
0048 class G4ErrorFreeTrajParam
0049 {
0050  public:  // with description
0051   G4ErrorFreeTrajParam()
0052     : fInvP(0.)
0053     , fLambda(0.)
0054     , fPhi(0.)
0055     , fYPerp(0.)
0056     , fZPerp(0.)
0057   {}
0058   G4ErrorFreeTrajParam(const G4Point3D& pos, const G4Vector3D& mom);
0059   // build parameters from position and momentum
0060
0061   G4ErrorFreeTrajParam(const G4ErrorFreeTrajParam&) = default;
0062   G4ErrorFreeTrajParam(G4ErrorFreeTrajParam&&)      = default;
0063   // The copy and move constructors
0064
0065   virtual ~G4ErrorFreeTrajParam() {}
0066
0067   G4ErrorFreeTrajParam& operator=(const G4ErrorFreeTrajParam&) = default;
0068   G4ErrorFreeTrajParam& operator=(G4ErrorFreeTrajParam&&) = default;
0069   // The copy and move assignment operators
0070
0071   void Update(const G4Track* aTrack);
0072   // update parameters from G4Track
0073
0074   friend std::ostream& operator<<(std::ostream&,
0075                                   const G4ErrorFreeTrajParam& ts);
0076
0077   // Set and Get methods
0078
0079   void SetParameters(const G4Point3D& pos, const G4Vector3D& mom);
0080
0081   G4Vector3D GetDirection() const { return fDir; }
0082
0083   G4double GetInvP() const { return fInvP; }
0084   G4double GetLambda() const { return fLambda; }
0085   G4double GetPhi() const { return fPhi; }
0086   G4double GetYPerp() const { return fYPerp; }
0087   G4double GetZPerp() const { return fZPerp; }
0088
0089  private:
0090   G4Vector3D fDir;   // direction to which YPerp, ZPerp refer
0091   G4double fInvP;    // inverse of momentum
0092   G4double fLambda;  // 90 - theta angle of direction
0093   G4double fPhi;     // phi angle of direction
0094   G4double fYPerp;   // Y coordinate
0095   G4double fZPerp;   // Z coordinate
0096 };
0097
0098 #endif