| 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 | //
|
|---|
| 26 | // $Id: G4MagIntegratorStepper.icc,v 1.12 2009/03/25 15:29:02 gcosmo Exp $
|
|---|
| 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $
|
|---|
| 28 | //
|
|---|
| 29 |
|
|---|
| 30 | inline
|
|---|
| 31 | G4EquationOfMotion* G4MagIntegratorStepper::GetEquationOfMotion()
|
|---|
| 32 | {
|
|---|
| 33 | return fEquation_Rhs;
|
|---|
| 34 | }
|
|---|
| 35 |
|
|---|
| 36 | inline void
|
|---|
| 37 | G4MagIntegratorStepper::SetEquationOfMotion(G4EquationOfMotion* newEquation)
|
|---|
| 38 | {
|
|---|
| 39 | if( newEquation != 0 )
|
|---|
| 40 | {
|
|---|
| 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 | {
|
|---|
| 67 | G4double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5];
|
|---|
| 68 |
|
|---|
| 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 | }
|
|---|
| 74 | }
|
|---|
| 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 | }
|
|---|
