G4SimpleRunge Class Reference

#include <G4SimpleRunge.hh>

Inheritance diagram for G4SimpleRunge:

Collaboration diagram for G4SimpleRunge:

Public Member Functions
	G4SimpleRunge (G4EquationOfMotion *EquationRhs, G4int numberOfVariables=6)
	~G4SimpleRunge ()
void	DumbStepper (const G4double y[], const G4double dydx[], G4double h, G4double yout[])
G4int	IntegratorOrder () const
Public Member Functions inherited from G4MagErrorStepper
	G4MagErrorStepper (G4EquationOfMotion *EqRhs, G4int numberOfVariables, G4int numStateVariables=12)
virtual	~G4MagErrorStepper ()
void	Stepper (const G4double y[], const G4double dydx[], G4double h, G4double yout[], G4double yerr[])
G4double	DistChord () const
Public Member Functions inherited from G4MagIntegratorStepper
	G4MagIntegratorStepper (G4EquationOfMotion *Equation, G4int numIntegrationVariables, G4int numStateVariables=12, bool isFSAL=false)
virtual	~G4MagIntegratorStepper ()
virtual void	ComputeRightHandSide (const G4double y[], G4double dydx[])
void	NormaliseTangentVector (G4double vec[6])
void	NormalisePolarizationVector (G4double vec[12])
void	RightHandSide (const double y[], double dydx[])
G4int	GetNumberOfVariables () const
G4int	GetNumberOfStateVariables () const
G4int	IntegrationOrder ()
G4EquationOfMotion *	GetEquationOfMotion ()
void	SetEquationOfMotion (G4EquationOfMotion *newEquation)
unsigned long	GetfNoRHSCalls ()
void	ResetfNORHSCalls ()
bool	IsFSAL ()

Additional Inherited Members
Protected Member Functions inherited from G4MagIntegratorStepper
void	SetIntegrationOrder (int order)
void	SetFSAL (bool flag=true)

Detailed Description

Definition at line 51 of file G4SimpleRunge.hh.

Constructor & Destructor Documentation

G4SimpleRunge::G4SimpleRunge	(	G4EquationOfMotion *	EquationRhs,
		G4int	numberOfVariables = 6
	)

Definition at line 48 of file G4SimpleRunge.cc.

  : G4MagErrorStepper(EqRhs, numberOfVariables),
    fNumberOfVariables(numberOfVariables)
{
   
   unsigned int noVariables= std::max(numberOfVariables,
                    GetNumberOfStateVariables()); 
                                             // To deal with Time >= 7+1 
   dydxTemp = new G4double[noVariables] ;
   yTemp    = new G4double[noVariables] ;
}

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G4SimpleRunge::~G4SimpleRunge

(

)

Definition at line 65 of file G4SimpleRunge.cc.

{
   delete[] dydxTemp;
   delete[] yTemp;
}

Member Function Documentation

void G4SimpleRunge::DumbStepper ( const G4double  y[], const G4double  dydx[], G4double  h, G4double  yout[]  )

virtual

Implements G4MagErrorStepper.

Definition at line 76 of file G4SimpleRunge.cc.

{
  // Initialise time to t0, needed when it is not updated by the integration.
  yTemp[7] = yOut[7] = yIn[7];   //  Better to set it to NaN;  // TODO

  G4int i;

  for( i = 0; i < fNumberOfVariables; i++ ) 
  {
    yTemp[i] = yIn[i] + 0.5 * h*dydx[i] ;
  }
  
  RightHandSide(yTemp,dydxTemp);
  
  for( i = 0; i < fNumberOfVariables; i++ ) 
  {
    yOut[i] = yIn[i] + h * ( dydxTemp[i] );
  }
}  

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G4int G4SimpleRunge::IntegratorOrder ( ) const

inlinevirtual

Implements G4MagIntegratorStepper.

Definition at line 67 of file G4SimpleRunge.hh.

{ return 2; }

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The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/geometry/magneticfield/include/G4SimpleRunge.hh
• geant4.10.03.p01/source/geometry/magneticfield/src/G4SimpleRunge.cc