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geant4/source/geometry/magneticfield/include/G4MagIntegratorStepper.icc
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2016-06-08 16:57:27 +02:00

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//
// ********************************************************************
// * DISCLAIMER *
// * *
// * The following disclaimer summarizes all the specific disclaimers *
// * of contributors to this software. The specific disclaimers,which *
// * govern, are listed with their locations in: *
// * http://cern.ch/geant4/license *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. *
// * *
// * This code implementation is the intellectual property of the *
// * GEANT4 collaboration. *
// * By copying, distributing or modifying the Program (or any work *
// * based on the Program) you indicate your acceptance of this *
// * statement, and all its terms. *
// ********************************************************************
//
//
// $Id: G4MagIntegratorStepper.icc,v 1.7 2002/11/20 18:10:44 japost Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
inline
G4EquationOfMotion* G4MagIntegratorStepper::GetEquationOfMotion()
{
return fEquation_Rhs;
}
inline
G4int G4MagIntegratorStepper::GetNumberOfVariables() const
{
return fNoIntegrationVariables;
}
inline
G4int G4MagIntegratorStepper::GetNumberOfStateVariables() const
{
return fNoStateVariables;
}
// inline
// void G4MagIntegratorStepper::SetNumberOfVariables(G4int newNo)
// {
// fNumberOfVariables = newNo;
// }
inline
void G4MagIntegratorStepper::RightHandSide( const double y[], double dydx[] )
{
fEquation_Rhs-> RightHandSide(y, dydx);
}
inline
void G4MagIntegratorStepper::NormaliseTangentVector( G4double vec[6] )
{
double drds2 = vec[3]*vec[3]+vec[4]*vec[4]+vec[5]*vec[5];
if( fabs(drds2 - 1.0) > 1.e-14 ){
double normx = 1.0 / sqrt(drds2);
for(int i=0;i<3;i++)
vec[i+3] *= normx;
}
}