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geant4.10.00.p01
source
geometry
magneticfield
include
G4ClassicalRK4.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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// * 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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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4ClassicalRK4.hh 66356 2012-12-18 09:02:32Z gcosmo $
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//
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//
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// class G4ClassicalRK4
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//
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// Class description:
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//
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// Integrate the equations of the motion of a particle in a magnetic field
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// using the classical 4th Runge-Kutta method.
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// History:
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// - Created: J.Apostolakis, V.Grichine - 30.1.97
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// - Moved into G4MagErrorStepper: W.Wander <wwc@mit.edu> - 12/09/97
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// -------------------------------------------------------------------
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#include "
G4MagErrorStepper.hh
"
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class
G4ClassicalRK4
:
public
G4MagErrorStepper
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{
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public
:
// with description
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G4ClassicalRK4
(
G4EquationOfMotion
*EquationMotion,
G4int
numberOfVariables = 6) ;
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~G4ClassicalRK4
() ;
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// A stepper that does not know about errors.
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// It is used by the MagErrorStepper stepper.
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void
DumbStepper
(
const
G4double
yIn[],
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const
G4double
dydx[],
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G4double
h,
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G4double
yOut[] ) ;
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// Given values for the variables y[0,..,n-1] and their derivatives
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// dydx[0,...,n-1] known at x, use the classical 4th Runge-Kutta
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// method to advance the solution over an interval h and return the
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// incremented variables as yout[0,...,n-1], which not be a distinct
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// array from y. The user supplies the routine RightHandSide(x,y,dydx),
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// which returns derivatives dydx at x. The source is routine rk4 from
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// NRC p. 712-713 .
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public
:
// without description
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G4int
IntegratorOrder
()
const
{
return
4; }
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private
:
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void
StepWithEst(
const
G4double
yIn[],
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const
G4double
dydx[],
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G4double
h,
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G4double
yOut[],
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G4double
& alpha2,
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G4double
& beta2,
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const
G4double
B1[],
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G4double
B2[] );
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// No longer used. Obsolete.
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G4ClassicalRK4
(
const
G4ClassicalRK4
&);
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G4ClassicalRK4
& operator=(
const
G4ClassicalRK4
&);
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// Private copy constructor and assignment operator.
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private
:
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// G4int fNumberOfVariables ; // is set default to 6 in constructor
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G4double
*dydxm, *dydxt, *yt;
// scratch space - not state
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};
G4ClassicalRK4::IntegratorOrder
G4int IntegratorOrder() const
Definition:
G4ClassicalRK4.hh:69
G4EquationOfMotion
Definition:
G4EquationOfMotion.hh:49
G4ClassicalRK4::~G4ClassicalRK4
~G4ClassicalRK4()
Definition:
G4ClassicalRK4.cc:53
G4MagErrorStepper
Definition:
G4MagErrorStepper.hh:49
G4int
int G4int
Definition:
G4Types.hh:78
G4ClassicalRK4::DumbStepper
void DumbStepper(const G4double yIn[], const G4double dydx[], G4double h, G4double yOut[])
Definition:
G4ClassicalRK4.cc:71
G4ClassicalRK4
Definition:
G4ClassicalRK4.hh:44
G4ClassicalRK4::G4ClassicalRK4
G4ClassicalRK4(G4EquationOfMotion *EquationMotion, G4int numberOfVariables=6)
Definition:
G4ClassicalRK4.cc:39
G4double
double G4double
Definition:
G4Types.hh:76
G4MagErrorStepper.hh
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