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G4EquationOfMotion.hh
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//
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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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// G4EquationOfMotion
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//
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// Class description:
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//
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// Abstract Base Class for the right hand size of the equation of
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// motion of a particle in a field.
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// Created: J.Apostolakis, 1998
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// -------------------------------------------------------------------
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#ifndef G4EQUATIONOFMOTION_HH
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#define G4EQUATIONOFMOTION_HH
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#include "
G4Types.hh
"
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#include "
G4Field.hh
"
// required in inline method implementations
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#include "
G4ChargeState.hh
"
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class
G4EquationOfMotion
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{
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public
:
// with description
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G4EquationOfMotion
(
G4Field
* Field );
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virtual
~G4EquationOfMotion
();
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// Constructor and virtual destructor. No operations.
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virtual
void
EvaluateRhsGivenB
(
const
G4double
y
[],
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const
G4double
B
[3],
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G4double
dydx[] )
const
= 0;
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// Given the value of the field "B", this function
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// calculates the value of the derivative dydx.
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// --------------------------------------------------------
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// This is the _only_ function a subclass must define.
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// The other two functions use Rhs_givenB.
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virtual
void
SetChargeMomentumMass
(
G4ChargeState
particleCharge,
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G4double
MomentumXc,
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G4double
MassXc2) = 0;
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// Set the charge, momentum and mass of the current particle
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// --> used to set the equation's coefficients ...
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inline
void
RightHandSide
(
const
G4double
y[],
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G4double
dydx[] )
const
;
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// This calculates the value of the derivative dydx at y.
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// It is the usual enquiry function.
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// ---------------------------
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// (It is not virtual, but calls the virtual function above.)
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inline
void
EvaluateRhsReturnB
(
const
G4double
y[],
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G4double
dydx[],
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G4double
Field[] )
const
;
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// Same as RHS above, but also returns the value of B.
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// Should be made the new default ? after putting dydx & B in a class.
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inline
void
GetFieldValue
(
const
G4double
Point[4],
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G4double
Field[] )
const
;
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// Obtain only the field - the stepper assumes it is pure Magnetic.
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// Not protected, because G4RKG3_Stepper uses it directly.
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inline
const
G4Field
*
GetFieldObj
()
const
;
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inline
G4Field
*
GetFieldObj
();
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inline
void
SetFieldObj
(
G4Field
* pField);
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private
:
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G4Field
*
itsField
=
nullptr
;
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};
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#include "G4EquationOfMotion.icc"
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#endif
geant4
tree
geant4-10.6-release
source
geometry
magneticfield
include
G4EquationOfMotion.hh
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Jin Huang
. updated:
Wed Jun 29 2022 17:25:16
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