[831] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
[1228] | 26 | // $Id: G4MagIntegratorStepper.icc,v 1.12 2009/03/25 15:29:02 gcosmo Exp $ |
---|
[1337] | 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
---|
[831] | 28 | // |
---|
| 29 | |
---|
| 30 | inline |
---|
| 31 | G4EquationOfMotion* G4MagIntegratorStepper::GetEquationOfMotion() |
---|
| 32 | { |
---|
| 33 | return fEquation_Rhs; |
---|
| 34 | } |
---|
| 35 | |
---|
| 36 | inline void |
---|
| 37 | G4MagIntegratorStepper::SetEquationOfMotion(G4EquationOfMotion* newEquation) |
---|
| 38 | { |
---|
[1228] | 39 | if( newEquation != 0 ) |
---|
| 40 | { |
---|
[831] | 41 | fEquation_Rhs= newEquation; |
---|
| 42 | } |
---|
| 43 | } |
---|
| 44 | |
---|
| 45 | inline |
---|
| 46 | G4int G4MagIntegratorStepper::GetNumberOfVariables() const |
---|
| 47 | { |
---|
| 48 | return fNoIntegrationVariables; |
---|
| 49 | } |
---|
| 50 | |
---|
| 51 | |
---|
| 52 | inline |
---|
| 53 | G4int G4MagIntegratorStepper::GetNumberOfStateVariables() const |
---|
| 54 | { |
---|
| 55 | return fNoStateVariables; |
---|
| 56 | } |
---|
| 57 | |
---|
| 58 | inline |
---|
| 59 | void G4MagIntegratorStepper::RightHandSide( const double y[], double dydx[] ) |
---|
| 60 | { |
---|
| 61 | fEquation_Rhs-> RightHandSide(y, dydx); |
---|
| 62 | } |
---|
| 63 | |
---|
| 64 | inline |
---|
| 65 | void G4MagIntegratorStepper::NormaliseTangentVector( G4double vec[6] ) |
---|
| 66 | { |
---|
[1228] | 67 | G4double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5]; |
---|
[831] | 68 | |
---|
[1228] | 69 | if( std::fabs(drds2 - 1.0) > 1.e-14 ) |
---|
| 70 | { |
---|
| 71 | G4double normx = 1.0 / std::sqrt(drds2); |
---|
| 72 | for(G4int i=3;i<6;i++) { vec[i] *= normx; } |
---|
| 73 | } |
---|
[831] | 74 | } |
---|
[1228] | 75 | |
---|
| 76 | inline |
---|
| 77 | void G4MagIntegratorStepper::NormalisePolarizationVector( G4double vec[12] ) |
---|
| 78 | { |
---|
| 79 | G4double drds2 = vec[9]*vec[9]+vec[10]*vec[10]+vec[11]*vec[11]; |
---|
| 80 | |
---|
| 81 | if( drds2 > 0. ) |
---|
| 82 | { |
---|
| 83 | if( std::fabs(drds2 - 1.0) > 1.e-14 ) |
---|
| 84 | { |
---|
| 85 | G4double normx = 1.0 / std::sqrt(drds2); |
---|
| 86 | for(G4int i=9;i<12;i++) { vec[i] *= normx; } |
---|
| 87 | } |
---|
| 88 | } |
---|
| 89 | } |
---|