| 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 | // $Id: G4MagIntegratorStepper.icc,v 1.10 2006/09/20 09:31:46 japost Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-02-cand-01 $
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| 28 | //
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| 29 |
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| 30 | inline
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| 31 | G4EquationOfMotion* G4MagIntegratorStepper::GetEquationOfMotion()
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| 32 | {
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| 33 | return fEquation_Rhs;
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| 34 | }
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| 35 |
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| 36 | inline void
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| 37 | G4MagIntegratorStepper::SetEquationOfMotion(G4EquationOfMotion* newEquation)
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| 38 | {
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| 39 | if( newEquation != 0 ) {
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| 40 | fEquation_Rhs= newEquation;
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| 41 | }
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| 42 | }
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| 43 |
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| 44 | inline
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| 45 | G4int G4MagIntegratorStepper::GetNumberOfVariables() const
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| 46 | {
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| 47 | return fNoIntegrationVariables;
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| 48 | }
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| 49 |
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| 50 |
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| 51 | inline
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| 52 | G4int G4MagIntegratorStepper::GetNumberOfStateVariables() const
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| 53 | {
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| 54 | return fNoStateVariables;
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| 55 | }
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| 56 |
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| 57 | // inline
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| 58 | // void G4MagIntegratorStepper::SetNumberOfVariables(G4int newNo)
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| 59 | // {
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| 60 | // fNumberOfVariables = newNo;
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| 61 | // }
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| 62 |
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| 63 | inline
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| 64 | void G4MagIntegratorStepper::RightHandSide( const double y[], double dydx[] )
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| 65 | {
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| 66 | fEquation_Rhs-> RightHandSide(y, dydx);
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| 67 | }
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| 68 |
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| 69 | inline
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| 70 | void G4MagIntegratorStepper::NormaliseTangentVector( G4double vec[6] )
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| 71 | {
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| 72 | double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5];
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| 73 |
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| 74 | if( std::fabs(drds2 - 1.0) > 1.e-14 ){
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| 75 | double normx = 1.0 / std::sqrt(drds2);
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| 76 | for(int i=0;i<3;i++)
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| 77 | vec[i+3] *= normx;
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| 78 | }
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| 79 | }
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