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// $Id: G4EquationOfMotion.icc,v 1.9 2006/06/29 18:22:07 gunter Exp $
// GEANT4 tag $Name:  $
//
//
//  Inline implementation 
//
// -------------------------------------------------------------------

inline
G4EquationOfMotion::G4EquationOfMotion(G4Field* pField) 
  :itsField(pField)
{}

inline
const G4Field* G4EquationOfMotion::GetFieldObj() const
{
  return itsField;
}

inline
void G4EquationOfMotion::SetFieldObj(G4Field* pField)
{
  itsField= pField;
}

inline
void G4EquationOfMotion::GetFieldValue( const  G4double Point[4],
			                       G4double Field[] ) const
{
  itsField-> GetFieldValue( Point, Field );
}

inline
void 
G4EquationOfMotion::RightHandSide( const  G4double y[],
				   G4double dydx[]   ) const
{
     G4double Field[G4maximum_number_of_field_components];   
     G4double  PositionAndTime[4];

     // Position
     PositionAndTime[0] = y[0];
     PositionAndTime[1] = y[1];
     PositionAndTime[2] = y[2];
     // Global Time
     PositionAndTime[3] = y[7];  // See G4FieldTrack::LoadFromArray

     GetFieldValue(PositionAndTime, Field) ;
     EvaluateRhsGivenB( y, Field, dydx );
}