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This commit is contained in:
Gabriele Cosmo
2016-06-08 15:55:53 +02:00
parent e7d7193284
commit cfcb558cfe
3050 changed files with 91703 additions and 48310 deletions
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source/geometry/magneticfield/include/G4MagIntegratorDriver.hh
+63 -58
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@@ -5,8 +5,8 @@
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4MagIntegratorDriver.hh,v 1.6 2000/04/27 09:14:06 gcosmo Exp $
// GEANT4 tag $Name: geant4-02-00 $
// $Id: G4MagIntegratorDriver.hh,v 1.7 2000/11/01 15:15:50 gcosmo Exp $
// GEANT4 tag $Name: geant4-03-00 $
//
//
// class G4MagInt_Driver
@@ -31,8 +31,8 @@ class G4MagInt_Driver
public: // with description
G4bool AccurateAdvance(G4FieldTrack& y_current,
const G4double hstep,
const G4double eps); // Requested y_err/hstep
G4double hstep,
G4double eps); // Requested y_err/hstep
// Above drivers for integrator (Runge-Kutta) with stepsize control.
// Integrates ODE starting values y_current
// from current s (s=s0) to s=s0+h with accuracy eps.
@@ -49,109 +49,114 @@ class G4MagInt_Driver
G4MagInt_Driver( G4double hminimum,
G4MagIntegratorStepper *pItsStepper,
G4int numberOfComponents=6);
~G4MagInt_Driver(){}
~G4MagInt_Driver();
// Constructor, destructor.
G4double GetHmin();
G4double Hmin(); // Obsolete
G4double GetSafety();
G4double GetPshrnk();
G4double GetPgrow();
G4double GetErrcon();
void GetDerivatives( const G4FieldTrack y_curr, // const, INput
G4double dydx[] ); // OUTput
inline G4double GetHmin() const;
inline G4double Hmin() const; // Obsolete
inline G4double GetSafety() const;
inline G4double GetPshrnk() const;
inline G4double GetPgrow() const;
inline G4double GetErrcon() const;
inline void GetDerivatives( const G4FieldTrack y_curr, // const, INput
G4double dydx[] ); // OUTput
// Accessors.
void RenewStepperAndAdjust(G4MagIntegratorStepper *pItsStepper);
inline void RenewStepperAndAdjust(G4MagIntegratorStepper *pItsStepper);
// Sets a new stepper pItsStepper for this driver. Then it calls
// ReSetParameters to reset its parameters accordingly.
void ReSetParameters(G4double new_safety= 0.9 );
inline void ReSetParameters(G4double new_safety= 0.9 );
// i) sets the exponents (pgrow & pshrnk),
// using the current Stepper's order,
// ii) sets the safety
// ii) calculates "errcon" according to the above values.
void SetSafety(G4double valS);
void SetPshrnk(G4double valPs);
void SetPgrow( G4double valPg);
void SetErrcon(G4double valEc);
inline void SetSafety(G4double valS);
inline void SetPshrnk(G4double valPs);
inline void SetPgrow (G4double valPg);
inline void SetErrcon(G4double valEc);
// When setting safety or pgrow, errcon will be set to a
// compatible value.
G4double ComputeAndSetErrcon();
inline G4double ComputeAndSetErrcon();
void SetChargeMomentumMass( const G4double particleCharge,
const G4double MomentumXc,
const G4double Mass );
inline void SetChargeMomentumMass( G4double particleCharge,
G4double MomentumXc,
G4double Mass );
// Change them in Equation. particleCharge is in e+ units.
G4MagIntegratorStepper* GetStepper();
inline const G4MagIntegratorStepper* GetStepper() const;
void OneGoodStep( G4double ystart[], // Like old RKF45step()
const G4double dydx[],
G4double& x,
const G4double htry,
const G4double eps, // memb variables ?
G4double& hdid,
G4double& hnext ) ;
void OneGoodStep( G4double ystart[], // Like old RKF45step()
const G4double dydx[],
G4double& x,
G4double htry,
G4double eps, // memb variables ?
G4double& hdid,
G4double& hnext ) ;
// This takes one Step that is as large as possible while
// satisfying the accuracy criterion of:
// yerr < eps * |y_end-y_start|
G4double ComputeNewStepSize(
G4double errMaxNorm, // normalised error
G4double hstepCurrent); // current step size
G4double ComputeNewStepSize( G4double errMaxNorm, // normalised error
G4double hstepCurrent); // current step size
// Taking the last step's normalised error, calculate
// a step size for the next step.
// Do not limit the next step's size within a factor of the
// current one.
G4double ComputeNewStepSize_WithinLimits(
G4double errMaxNorm, // normalised error
G4double ComputeNewStepSize_WithinLimits(
G4double errMaxNorm, // normalised error
G4double hstepCurrent); // current step size
// Taking the last step's normalised error, calculate
// a step size for the next step.
// Limit the next step's size within a range around the current one.
G4int GetMaxNoSteps();
void SetMaxNoSteps( G4int val);
inline G4int GetMaxNoSteps() const;
inline void SetMaxNoSteps( G4int val);
public: // without description
G4double SetHmin(G4double newval);
inline void SetHmin(G4double newval);
protected:
void WarnSmallStepSize( G4double hnext, G4double hstep,
G4double h, G4double xDone,
G4int noSteps);
void WarnTooManyStep( G4double x1start, G4double x2end, G4double xCurrent);
void WarnEndPointTooFar (G4double endPointDist,
G4double hStepSize ,
G4double epsilonRelative,
G4int debugFlag);
void WarnSmallStepSize( G4double hnext, G4double hstep,
G4double h, G4double xDone,
G4int noSteps);
void WarnTooManyStep( G4double x1start, G4double x2end, G4double xCurrent);
void WarnEndPointTooFar (G4double endPointDist,
G4double hStepSize ,
G4double epsilonRelative,
G4int debugFlag);
// Issue warnings for undesirable situations
private:
G4double hminimum_val;
G4MagInt_Driver(const G4MagInt_Driver&);
G4MagInt_Driver& operator=(const G4MagInt_Driver&);
// Private copy constructor and assignment operator.
private:
G4double hminimum_val;
// Minimum Step allowed in a Step.
const G4int nvar;
G4int nvar;
G4MagIntegratorStepper *pIntStepper;
G4int fMaxNoSteps;
static const G4int fMaxStepBase;
G4MagIntegratorStepper *pIntStepper;
G4int fMaxNoSteps;
static const G4int fMaxStepBase;
G4double safety;
G4double pshrnk; // exponent for shrinking
G4double pgrow; // exponent for growth
G4double errcon;
G4double safety;
G4double pshrnk; // exponent for shrinking
G4double pgrow; // exponent for growth
G4double errcon;
// Parameters used to grow and shrink trial stepsize.
static const G4double max_stepping_increase;
static const G4double max_stepping_decrease;
static const G4double max_stepping_increase;
static const G4double max_stepping_decrease;
// Maximum stepsize increase/decrease factors.
};