00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // $Id: G4MagIntegratorStepper.icc 69786 2013-05-15 09:38:51Z gcosmo $ 00027 // 00028 00029 inline 00030 G4EquationOfMotion* G4MagIntegratorStepper::GetEquationOfMotion() 00031 { 00032 return fEquation_Rhs; 00033 } 00034 00035 inline void 00036 G4MagIntegratorStepper::SetEquationOfMotion(G4EquationOfMotion* newEquation) 00037 { 00038 if( newEquation != 0 ) 00039 { 00040 fEquation_Rhs= newEquation; 00041 } 00042 } 00043 00044 inline 00045 G4int G4MagIntegratorStepper::GetNumberOfVariables() const 00046 { 00047 return fNoIntegrationVariables; 00048 } 00049 00050 00051 inline 00052 G4int G4MagIntegratorStepper::GetNumberOfStateVariables() const 00053 { 00054 return fNoStateVariables; 00055 } 00056 00057 inline 00058 void G4MagIntegratorStepper::RightHandSide( const double y[], double dydx[] ) 00059 { 00060 fEquation_Rhs-> RightHandSide(y, dydx); 00061 } 00062 00063 inline 00064 void G4MagIntegratorStepper::NormaliseTangentVector( G4double vec[6] ) 00065 { 00066 G4double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5]; 00067 00068 if( std::fabs(drds2 - 1.0) > 1.e-14 ) 00069 { 00070 G4double normx = 1.0 / std::sqrt(drds2); 00071 for(G4int i=3;i<6;i++) { vec[i] *= normx; } 00072 } 00073 } 00074 00075 inline 00076 void G4MagIntegratorStepper::NormalisePolarizationVector( G4double vec[12] ) 00077 { 00078 G4double drds2 = vec[9]*vec[9]+vec[10]*vec[10]+vec[11]*vec[11]; 00079 00080 if( drds2 > 0. ) 00081 { 00082 if( std::fabs(drds2 - 1.0) > 1.e-14 ) 00083 { 00084 G4double normx = 1.0 / std::sqrt(drds2); 00085 for(G4int i=9;i<12;i++) { vec[i] *= normx; } 00086 } 00087 } 00088 }