G4EqGravityField.hh

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//
// 
// class G4EqGravityField
//
// Class description:
//
// This is the right-hand side of equation of motion in a 
// gravity field.
//
// History:
// - 14.06.11 P.Gumplinger, Created.
// -------------------------------------------------------------------
// Adopted from G4EqMagElectricField.hh
//
// Thanks to Peter Fierlinger (PSI) and
// A. Capra and A. Fontana (INFN Pavia)
// -------------------------------------------------------------------
 
#ifndef G4EQGRAVITYFIELD_hh
#define G4EQGRAVITYFIELD_hh
 
#include "G4EquationOfMotion.hh"
#include "G4UniformGravityField.hh"
 
class G4EqGravityField : public G4EquationOfMotion
{
  public:  // with description
 
    G4EqGravityField(G4UniformGravityField *gField ) 
      : G4EquationOfMotion( gField ) {;}
 
    ~G4EqGravityField() {;}
 
    void SetChargeMomentumMass(G4double particleCharge, // in e+ units
                               G4double MomentumXc,
                               G4double mass);
 
    void EvaluateRhsGivenB( const G4double y[],
                            const G4double Field[],
                            G4double dydx[] ) const;
      // Given the value of the gravitational field, this function
      // calculates the value of the derivative dydx.
 
  private:
 
    G4double  fMass;
 
};
 
#endif /* G4EQGRAVITYFIELD */