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 1.12 2009/03/25 15:29:02 gcosmo Exp $ |
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27 | // GEANT4 tag $Name: $ |
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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 | { |
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41 | fEquation_Rhs= newEquation; |
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42 | } |
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43 | } |
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44 | |
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45 | inline |
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46 | G4int G4MagIntegratorStepper::GetNumberOfVariables() const |
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47 | { |
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48 | return fNoIntegrationVariables; |
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49 | } |
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50 | |
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51 | |
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52 | inline |
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53 | G4int G4MagIntegratorStepper::GetNumberOfStateVariables() const |
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54 | { |
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55 | return fNoStateVariables; |
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56 | } |
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57 | |
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58 | inline |
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59 | void G4MagIntegratorStepper::RightHandSide( const double y[], double dydx[] ) |
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60 | { |
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61 | fEquation_Rhs-> RightHandSide(y, dydx); |
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62 | } |
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63 | |
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64 | inline |
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65 | void G4MagIntegratorStepper::NormaliseTangentVector( G4double vec[6] ) |
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66 | { |
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67 | G4double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5]; |
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68 | |
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69 | if( std::fabs(drds2 - 1.0) > 1.e-14 ) |
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70 | { |
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71 | G4double normx = 1.0 / std::sqrt(drds2); |
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72 | for(G4int i=3;i<6;i++) { vec[i] *= normx; } |
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73 | } |
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74 | } |
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75 | |
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76 | inline |
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77 | void G4MagIntegratorStepper::NormalisePolarizationVector( G4double vec[12] ) |
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78 | { |
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79 | G4double drds2 = vec[9]*vec[9]+vec[10]*vec[10]+vec[11]*vec[11]; |
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80 | |
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81 | if( drds2 > 0. ) |
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82 | { |
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83 | if( std::fabs(drds2 - 1.0) > 1.e-14 ) |
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84 | { |
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85 | G4double normx = 1.0 / std::sqrt(drds2); |
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86 | for(G4int i=9;i<12;i++) { vec[i] *= normx; } |
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87 | } |
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88 | } |
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89 | } |
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