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G4DormandPrince745.hh
Go to the documentation of this file.
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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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// G4DormandPrince745
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//
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// Class desription:
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//
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// An implementation of the 5th order embedded RK method from the paper:
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// J. R. Dormand and P. J. Prince, "A family of embedded Runge-Kutta formulae"
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// Journal of computational and applied Math., vol.6, no.1, pp.19-26, 1980.
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//
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// DormandPrince7 - 5(4) embedded RK method
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//
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// Created: Somnath Banerjee, Google Summer of Code 2015, 25 May 2015
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// Supervision: John Apostolakis, CERN
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// --------------------------------------------------------------------
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#ifndef G4DORMAND_PRINCE_745_HH
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#define G4DORMAND_PRINCE_745_HH
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#include "
G4MagIntegratorStepper.hh
"
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#include "
G4FieldUtils.hh
"
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class
G4DormandPrince745
:
public
G4MagIntegratorStepper
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{
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public
:
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G4DormandPrince745
(
G4EquationOfMotion
* equation,
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G4int
numberOfVariables = 6);
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virtual
void
Stepper
(
const
G4double
yInput[],
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const
G4double
dydx[],
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G4double
hstep,
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G4double
yOutput[],
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G4double
yError[])
override
;
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void
Stepper
(
const
G4double
yInput[],
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const
G4double
dydx[],
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G4double
hstep,
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G4double
yOutput[],
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G4double
yError[],
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G4double
dydxOutput[]);
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inline
void
SetupInterpolation
() {}
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inline
void
Interpolate
(
G4double
tau,
G4double
yOut[])
const
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{
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Interpolate4thOrder
(yOut, tau);
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}
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// For calculating the output at the tau fraction of Step
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virtual
G4double
DistChord
()
const override
;
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virtual
G4int
IntegratorOrder
()
const override
{
return
4; }
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const
field_utils::State
&
GetYOut
()
const
{
return
fyOut
; }
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void
Interpolate4thOrder
(
G4double
yOut[],
G4double
tau)
const
;
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void
SetupInterpolation5thOrder
();
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void
Interpolate5thOrder
(
G4double
yOut[],
G4double
tau)
const
;
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private
:
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field_utils::State
ak2
,
ak3
,
ak4
,
ak5
,
ak6
,
ak7
,
ak8
,
ak9
;
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field_utils::State
fyIn
,
fyOut
,
fdydxIn
;
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G4double
fLastStepLength
= -1.0;
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};
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#endif
geant4
tree
geant4-10.6-release
source
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magneticfield
include
G4DormandPrince745.hh
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:16
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