Gabriele Cosmo
100 lines
3.9 KiB
C++
100 lines
3.9 KiB
C++
//
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// ********************************************************************
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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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// G4DoLoMcPriRK34
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//
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// Class description:
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//
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// Dormand-Lockyer-McGorrigan-Prince-6-3-4 non-FSAL method
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// ( 6 stage, 3rd & 4th order embedded RK method )
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// Created: Somnath Banerjee, Google Summer of Code 2015, 7 July 2015
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// Supervision: John Apostolakis, CERN
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// --------------------------------------------------------------------
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#ifndef DOLO_MCPRI_RK34_HH
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#define DOLO_MCPRI_RK34_HH
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#include "G4MagIntegratorStepper.hh"
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class G4DoLoMcPriRK34 : public G4MagIntegratorStepper
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{
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public:
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G4DoLoMcPriRK34( G4EquationOfMotion* EqRhs,
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G4int numberOfVariables = 6,
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G4bool primary = true );
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// Constructor using Equation
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~G4DoLoMcPriRK34();
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G4DoLoMcPriRK34(const G4DoLoMcPriRK34&) = delete;
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G4DoLoMcPriRK34& operator=(const G4DoLoMcPriRK34&) = delete;
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// Copy constructor and assignment operator not allowed
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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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void SetupInterpolation();
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void SetupInterpolate( const G4double yInput[],
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const G4double dydx[],
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const G4double Step );
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// For Preparing the interpolation and calculating the extra stages
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void Interpolate( const G4double yInput[],
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const G4double dydx[],
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const G4double Step,
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G4double yOut[],
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G4double tau );
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// For calculating the output at the tau fraction of Step
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void Interpolate( G4double tau,
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G4double yOut[]);
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void interpolate(const G4double yInput[],
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const G4double dydx[],
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G4double yOut[],
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G4double Step,
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G4double tau ) ;
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G4double DistChord() const;
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G4int IntegratorOrder() const { return 3; }
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private :
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G4double *ak2, *ak3, *ak4, *ak5, *ak6, *yTemp, *yIn;
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G4double fLastStepLength = -1.0;
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G4double *fLastInitialVector, *fLastFinalVector,
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*fLastDyDx, *fMidVector, *fMidError;
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// for DistChord calculations
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G4DoLoMcPriRK34* fAuxStepper = nullptr;
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};
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#endif
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