G4EqGravityField.hh

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// G4EqGravityField
//
// Class description:
//
// This is the right-hand side of equation of motion in a gravity field.
 
// Created: P.Gumplinger, 14.06.11 - Adopted from G4EqMagElectricField
//          Thanks to P.Fierlinger (PSI) and A.Capra and A.Fontana (INFN Pavia)
// -------------------------------------------------------------------
#ifndef G4EQGRAVITYFIELD_HH
#define G4EQGRAVITYFIELD_HH
 
#include "G4ChargeState.hh"
#include "G4EquationOfMotion.hh"
#include "G4UniformGravityField.hh"
 
class G4EqGravityField : public G4EquationOfMotion
{
  public:
 
    G4EqGravityField(G4UniformGravityField* gField);
   ~G4EqGravityField() override;
 
    void SetChargeMomentumMass(G4ChargeState particleCharge, // in e+ units
                               G4double MomentumXc,
                               G4double mass) override;
 
    void EvaluateRhsGivenB( const G4double y[],
                            const G4double Field[],
                                  G4double dydx[] ) const override;
      // Given the value of the gravitational field, this function
      // calculates the value of the derivative dydx.
 
  private:
 
    G4double fMass = 0.0;
};
 
#endif