Gabriele Cosmo
95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4EqGravityField
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//
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// Class description:
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//
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// This is the right-hand side of equation of motion in a gravity field.
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// Author: Peter Gumplinger (TRIUMF), 14.06.11 - Adopted from G4EqMagElectricField
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// Thanks to P.Fierlinger (PSI) and A.Capra and A.Fontana (INFN Pavia)
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// -------------------------------------------------------------------
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#ifndef G4EQGRAVITYFIELD_HH
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#define G4EQGRAVITYFIELD_HH
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#include "G4ChargeState.hh"
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#include "G4EquationOfMotion.hh"
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#include "G4UniformGravityField.hh"
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/**
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* @brief G4EqGravityField implements the right-hand side of equation
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* of motion in a gravity field.
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*/
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class G4EqGravityField : public G4EquationOfMotion
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{
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public:
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/**
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* Constructor for G4EqGravityField.
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* @param[in] gField Pointer to the uniform gravity field.
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*/
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G4EqGravityField(G4UniformGravityField* gField);
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/**
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* Default Destructor.
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*/
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~G4EqGravityField() override = default;
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/**
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* Sets the charge, momentum and mass of the current particle.
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* Used to set the equation's coefficients.
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* @param[in] particleCharge Magnetic charge and moments in e+ units.
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* @param[in] MomentumXc Particle momentum.
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* @param[in] mass Particle mass.
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*/
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void SetChargeMomentumMass(G4ChargeState particleCharge, // in e+ units
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G4double MomentumXc,
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G4double mass) override;
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/**
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* Calculates the value of the derivative, given the value of the
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* electromagnetic field.
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* @param[in] y Coefficients array.
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* @param[in] Field Field value.
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* @param[out] dydx Derivatives array.
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*/
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void EvaluateRhsGivenB( const G4double y[],
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const G4double Field[],
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G4double dydx[] ) const override;
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/**
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* Returns the equation type-ID, "kEqGravity".
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*/
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inline G4EquationType GetEquationType() const override { return kEqGravity; }
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private:
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G4double fMass = 0.0;
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};
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#endif
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