Gabriele Cosmo
129 lines
4.6 KiB
C++
129 lines
4.6 KiB
C++
// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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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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// * *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: $
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//
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// Helper namespace 'magneticfield'
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//
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// Description:
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// class G4IntegrationDriver<G4BulirschStoer> implementation by Dmitry Sorokin
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// This driver class uses Bulirsch-Stoer method to integrate
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// the equation of motion
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//
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// Implementation by Dmitry Sorokin - GSoC 2016
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// Work supported by Google as part of Google Summer of Code 2016.
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// Supervision / code review: John Apostolakis
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef G4BULIRSCH_STOER_DRIVER_HH
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#define G4BULIRSCH_STOER_DRIVER_HH
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#include "G4IntegrationDriver.hh"
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#include "G4BulirschStoer.hh"
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template <>
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class G4IntegrationDriver<G4BulirschStoer>: public G4VIntegrationDriver {
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public:
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G4IntegrationDriver(
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G4double hminimum,
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G4BulirschStoer* stepper,
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G4int numberOfComponents = 6,
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G4int statisticsVerbosity = 1);
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~G4IntegrationDriver() = default;
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G4IntegrationDriver(const G4IntegrationDriver&) = delete;
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G4IntegrationDriver& operator=(const G4IntegrationDriver&) = delete;
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virtual G4bool AccurateAdvance(
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G4FieldTrack& track,
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G4double stepLen,
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G4double eps,
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G4double beginStep = 0) override;
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virtual G4bool QuickAdvance(
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G4FieldTrack& y_val,
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const G4double dydx[],
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G4double hstep,
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G4double& missDist,
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G4double& dyerr) override;
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void OneGoodStep(
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G4double y[],
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const G4double dydx[],
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G4double& curveLength,
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G4double htry,
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G4double eps,
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G4double& hdid,
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G4double& hnext);
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virtual void GetDerivatives(
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const G4FieldTrack& track,
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G4double dydx[]) const override;
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virtual void SetVerboseLevel(G4int level) override;
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virtual G4int GetVerboseLevel() const override;
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virtual G4double ComputeNewStepSize(
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G4double errMaxNorm, // normalised error
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G4double hstepCurrent) override; // current step size
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virtual G4EquationOfMotion* GetEquationOfMotion() override;
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const G4EquationOfMotion* GetEquationOfMotion() const;
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virtual void SetEquationOfMotion(G4EquationOfMotion* equation) override;
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virtual const G4MagIntegratorStepper* GetStepper() const override;
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virtual G4MagIntegratorStepper* GetStepper() override;
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private:
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G4int GetNumberOfVarialbles() const;
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G4double fMinimumStep;
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G4double fVerbosity;
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G4ModifiedMidpoint fMidpointMethod;
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G4BulirschStoer* bulirschStoer;
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G4double yIn[G4FieldTrack::ncompSVEC],
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yMid[G4FieldTrack::ncompSVEC],
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yMid2[G4FieldTrack::ncompSVEC],
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yOut[G4FieldTrack::ncompSVEC],
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yOut2[G4FieldTrack::ncompSVEC],
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yError[G4FieldTrack::ncompSVEC];
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G4double dydxCurrent[G4FieldTrack::ncompSVEC];
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G4double yCurrent[G4FieldTrack::ncompSVEC];
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G4double derivs[2][6][G4FieldTrack::ncompSVEC];
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const G4int interval_sequence[2];
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};
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#include "G4BulirschStoerDriver.icc"
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#endif
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