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G4SimpleRunge.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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// * 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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// * 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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// * technical work of the GEANT4 collaboration. *
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// ********************************************************************
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//
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//
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// $Id: G4SimpleRunge.hh 66356 2012-12-18 09:02:32Z gcosmo $
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//
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//
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// class G4SimpleRunge
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//
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// Class description:
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//
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// Simple Runge:
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//
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// x_1 = x_0 + h * ( dx( t_0+h/2, x_0 + h/2 * dx( t_0, x_0) ) )
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//
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// Second order solver.
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// Takes the derivative at a position to be assumed at the middle of the
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// Step and adds it to the current position.
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// History:
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// - Created. W.Wander <wwc@mit.edu>, 12/09/97
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// -------------------------------------------------------------------
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#ifndef G4SIMPLERUNGE_HH
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#define G4SIMPLERUNGE_HH
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#include "
G4MagErrorStepper.hh
"
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class
G4SimpleRunge
:
public
G4MagErrorStepper
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{
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public
:
// with description
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G4SimpleRunge
(
G4EquationOfMotion
*EquationRhs,
G4int
numberOfVariables = 6) ;
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~G4SimpleRunge
();
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// Constructor and destructor.
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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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G4int
fNumberOfVariables
;
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G4double
*
dydxTemp
;
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G4double
*
yTemp
;
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// scratch space
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};
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#endif
/* G4SIMPLERUNGE_HH */
G4SimpleRunge::G4SimpleRunge
G4SimpleRunge(G4EquationOfMotion *EquationRhs, G4int numberOfVariables=6)
Definition:
G4SimpleRunge.cc:48
G4EquationOfMotion
Definition:
G4EquationOfMotion.hh:49
G4SimpleRunge::dydxTemp
G4double * dydxTemp
Definition:
G4SimpleRunge.hh:73
G4MagErrorStepper
Definition:
G4MagErrorStepper.hh:49
G4SimpleRunge::fNumberOfVariables
G4int fNumberOfVariables
Definition:
G4SimpleRunge.hh:71
G4int
int G4int
Definition:
G4Types.hh:78
G4SimpleRunge::yTemp
G4double * yTemp
Definition:
G4SimpleRunge.hh:74
G4SimpleRunge::DumbStepper
void DumbStepper(const G4double y[], const G4double dydx[], G4double h, G4double yout[])
Definition:
G4SimpleRunge.cc:76
G4SimpleRunge::~G4SimpleRunge
~G4SimpleRunge()
Definition:
G4SimpleRunge.cc:65
G4SimpleRunge
Definition:
G4SimpleRunge.hh:51
G4double
double G4double
Definition:
G4Types.hh:76
G4SimpleRunge::IntegratorOrder
G4int IntegratorOrder() const
Definition:
G4SimpleRunge.hh:67
G4MagErrorStepper.hh
geant4.10.02.p01
source
geometry
magneticfield
include
G4SimpleRunge.hh
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