include/Geant4/G4EqGravityField.hh

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0024 // ********************************************************************
0025 //
0026 // G4EqGravityField
0027 //
0028 // Class description:
0029 //
0030 // This is the right-hand side of equation of motion in a gravity field.
0031
0032 // Created: P.Gumplinger, 14.06.11 - Adopted from G4EqMagElectricField
0033 //          Thanks to P.Fierlinger (PSI) and A.Capra and A.Fontana (INFN Pavia)
0034 // -------------------------------------------------------------------
0035 #ifndef G4EQGRAVITYFIELD_HH
0036 #define G4EQGRAVITYFIELD_HH
0037
0038 #include "G4ChargeState.hh"
0039 #include "G4EquationOfMotion.hh"
0040 #include "G4UniformGravityField.hh"
0041
0042 class G4EqGravityField : public G4EquationOfMotion
0043 {
0044   public:
0045
0046     G4EqGravityField(G4UniformGravityField* gField);
0047    ~G4EqGravityField() override;
0048
0049     void SetChargeMomentumMass(G4ChargeState particleCharge, // in e+ units
0050                                G4double MomentumXc,
0051                                G4double mass) override;
0052
0053     void EvaluateRhsGivenB( const G4double y[],
0054                             const G4double Field[],
0055                                   G4double dydx[] ) const override;
0056       // Given the value of the gravitational field, this function
0057       // calculates the value of the derivative dydx.
0058
0059   private:
0060
0061     G4double fMass = 0.0;
0062 };
0063
0064 #endif