| 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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