[831] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4MagErrorStepper.hh,v 1.11 2006/06/29 18:22:50 gunter Exp $ |
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[921] | 28 | // GEANT4 tag $Name: geant4-09-02-cand-01 $ |
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[831] | 29 | // |
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| 30 | // |
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| 31 | // class G4MagErrorStepper |
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| 32 | // |
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| 33 | // Class description: |
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| 34 | // |
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| 35 | // Abstract base class for integrator of particle's equation of motion, |
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| 36 | // used in tracking in space dependent magnetic field. |
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| 37 | |
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| 38 | // History: |
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| 39 | // 09.12.97 W.Wander <wwc@mit.edu> Created G4MagErrorStepper |
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| 40 | // -------------------------------------------------------------------- |
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| 41 | |
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| 42 | #ifndef G4MAGERRORSTEPPER_HH |
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| 43 | #define G4MAGERRORSTEPPER_HH |
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| 44 | |
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| 45 | #include "G4Types.hh" |
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| 46 | #include "G4MagIntegratorStepper.hh" |
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| 47 | #include "G4Mag_EqRhs.hh" |
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| 48 | #include "G4ThreeVector.hh" |
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| 49 | |
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| 50 | class G4MagErrorStepper : public G4MagIntegratorStepper |
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| 51 | { |
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| 52 | public: // with description |
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| 53 | |
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| 54 | // G4MagErrorStepper(G4Mag_EqRhs *EqRhs, G4int numberOfVariables); |
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| 55 | G4MagErrorStepper(G4EquationOfMotion *EqRhs, G4int numberOfVariables); |
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| 56 | virtual ~G4MagErrorStepper(); |
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| 57 | |
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| 58 | void Stepper( const G4double y[], |
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| 59 | const G4double dydx[], |
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| 60 | G4double h, |
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| 61 | G4double yout[], |
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| 62 | G4double yerr[] ); |
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| 63 | // The stepper for the Runge Kutta integration. The stepsize |
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| 64 | // is fixed, with the Step size given by h. |
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| 65 | // Integrates ODE starting values y[0 to 6]. |
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| 66 | // Outputs yout[] and its estimated error yerr[]. |
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| 67 | |
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| 68 | virtual void DumbStepper( const G4double y[], |
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| 69 | const G4double dydx[], |
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| 70 | G4double h, |
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| 71 | G4double yout[] ) = 0; |
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| 72 | // Performs a 'dump' Step without error calculation. |
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| 73 | |
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| 74 | G4double DistChord() const; |
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| 75 | |
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| 76 | private: |
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| 77 | |
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| 78 | G4MagErrorStepper(const G4MagErrorStepper&); |
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| 79 | G4MagErrorStepper& operator=(const G4MagErrorStepper&); |
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| 80 | // Private copy constructor and assignment operator. |
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| 81 | |
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| 82 | private: |
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| 83 | |
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| 84 | G4ThreeVector fInitialPoint, fMidPoint, fFinalPoint; |
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| 85 | // Data stored in order to find the chord |
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| 86 | |
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| 87 | // G4int theNumberOfVariables ; |
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| 88 | |
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| 89 | G4double *yInitial, *yMiddle, *dydxMid, *yOneStep; |
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| 90 | // The following arrays are used only for temporary storage |
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| 91 | // they are allocated at the class level only for efficiency - |
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| 92 | // so that calls to new and delete are not made in Stepper(). |
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| 93 | }; |
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| 94 | |
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| 95 | #include "G4MagErrorStepper.icc" |
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| 96 | |
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| 97 | #endif /* G4MAGERRORSTEPPER_HH */ |
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