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G4ImplicitEuler.hh
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * the Geant4 Collaboration. It is provided under the terms and *
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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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// ********************************************************************
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//
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//
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// $Id: G4ImplicitEuler.hh 66356 2012-12-18 09:02:32Z gcosmo $
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//
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//
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// class G4ImplicitEuler
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//
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// Class description:
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//
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// Implicit Euler stepper for magnetic field:
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// x_1 = x_0 + h/2 * ( dx(t_0,x_0) + dx(t_0+h,x_0+h*dx(t_0,x_0) ) )
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//
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// Second order solver.
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// Takes the current derivative and add it to the current position.
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// Takes the output and its derivative. Adds the mean of both
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// derivatives to form the final output.
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// W. Wander <wwc@mit.edu> 12/09/97
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// -------------------------------------------------------------------
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#ifndef G4IMPLICITEULER_HH
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#define G4IMPLICITEULER_HH
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#include "
G4MagErrorStepper.hh
"
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class
G4ImplicitEuler
:
public
G4MagErrorStepper
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{
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public
:
// with description
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G4ImplicitEuler
(
G4EquationOfMotion
*EqRhs,
G4int
numberOfVariables = 6) ;
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~G4ImplicitEuler
();
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void
DumbStepper
(
const
G4double
y[] ,
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const
G4double
dydx[] ,
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G4double
h ,
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G4double
yout[] ) ;
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public
:
// without description
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G4int
IntegratorOrder
()
const
{
return
2 ; } ;
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private
:
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G4double
*
dydxTemp
;
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G4double
*
yTemp
;
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// Temporaries, created to avoid new/delete on every call
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};
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#endif
/* G4IMPLICITEULER_HH */
G4EquationOfMotion
Definition:
G4EquationOfMotion.hh:49
G4MagErrorStepper
Definition:
G4MagErrorStepper.hh:49
G4ImplicitEuler::yTemp
G4double * yTemp
Definition:
G4ImplicitEuler.hh:70
G4ImplicitEuler::IntegratorOrder
G4int IntegratorOrder() const
Definition:
G4ImplicitEuler.hh:65
G4int
int G4int
Definition:
G4Types.hh:78
G4ImplicitEuler::DumbStepper
void DumbStepper(const G4double y[], const G4double dydx[], G4double h, G4double yout[])
Definition:
G4ImplicitEuler.cc:75
G4ImplicitEuler
Definition:
G4ImplicitEuler.hh:50
G4ImplicitEuler::~G4ImplicitEuler
~G4ImplicitEuler()
Definition:
G4ImplicitEuler.cc:64
G4double
double G4double
Definition:
G4Types.hh:76
G4ImplicitEuler::dydxTemp
G4double * dydxTemp
Definition:
G4ImplicitEuler.hh:65
G4MagErrorStepper.hh
G4ImplicitEuler::G4ImplicitEuler
G4ImplicitEuler(G4EquationOfMotion *EqRhs, G4int numberOfVariables=6)
Definition:
G4ImplicitEuler.cc:50
geant4.10.02.p01
source
geometry
magneticfield
include
G4ImplicitEuler.hh
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