Gabriele Cosmo
95 lines
3.7 KiB
C++
95 lines
3.7 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4MagErrorStepper.hh,v 1.10 2003/11/05 12:50:00 japost Exp $
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// GEANT4 tag $Name: geant4-06-00-patch-01 $
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//
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//
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// class G4MagErrorStepper
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//
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// Class description:
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//
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// Abstract base class for integrator of particle's equation of motion,
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// used in tracking in space dependent magnetic field.
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// History:
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// 09.12.97 W.Wander <wwc@mit.edu> Created G4MagErrorStepper
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// --------------------------------------------------------------------
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#ifndef G4MAGERRORSTEPPER_HH
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#define G4MAGERRORSTEPPER_HH
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#include "G4Types.hh"
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#include "G4MagIntegratorStepper.hh"
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#include "G4Mag_EqRhs.hh"
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#include "G4ThreeVector.hh"
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class G4MagErrorStepper : public G4MagIntegratorStepper
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{
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public: // with description
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// G4MagErrorStepper(G4Mag_EqRhs *EqRhs, G4int numberOfVariables);
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G4MagErrorStepper(G4EquationOfMotion *EqRhs, G4int numberOfVariables);
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virtual ~G4MagErrorStepper();
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void Stepper( 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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G4double yerr[] );
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// The stepper for the Runge Kutta integration. The stepsize
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// is fixed, with the Step size given by h.
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// Integrates ODE starting values y[0 to 6].
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// Outputs yout[] and its estimated error yerr[].
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virtual void DumbStepper( const G4double y[],
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const G4double dydx[],
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G4double h,
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G4double yout[] ) = 0;
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// Performs a 'dump' Step without error calculation.
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G4double DistChord() const;
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private:
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G4MagErrorStepper(const G4MagErrorStepper&);
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G4MagErrorStepper& operator=(const G4MagErrorStepper&);
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// Private copy constructor and assignment operator.
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private:
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G4ThreeVector fInitialPoint, fMidPoint, fFinalPoint;
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// Data stored in order to find the chord
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// G4int theNumberOfVariables ;
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G4double *yInitial, *yMiddle, *dydxMid, *yOneStep;
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// The following arrays are used only for temporary storage
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// they are allocated at the class level only for efficiency -
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// so that calls to new and delete are not made in Stepper().
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};
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#include "G4MagErrorStepper.icc"
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#endif /* G4MAGERRORSTEPPER_HH */
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