//
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//
// $Id: G4El_EqRhs.cc,v 1.10 2003/11/05 16:33:55 japost Exp $
// GEANT4 tag $Name: geant4-06-00-patch-01 $
//
//  This is the standard right-hand side for equation of motion  
//    in a pure Electric Field .
//
//   Other that might be required are:
//     i) is when using a moving reference frame ... or
//    ii) extending for other forces, eg an electric field
//
//            J. Apostolakis, January 13th, 1997
// 
// --------------------------------------------------------------------

#include "G4ElectricField.hh"
#include "G4El_EqRhs.hh"
#include "globals.hh"

//const G4double G4El_EqRhs::fUnitConstant = 0.299792458 * (GeV/(tesla*m)); 

// Constructor Implementation
//
G4El_EqRhs::G4El_EqRhs( G4ElectricField *elField ) 
   : G4EquationOfMotion(elField)
{ 
}


G4El_EqRhs::~G4El_EqRhs() { }

 void G4El_EqRhs::RightHandSide( const  G4double y[],
				       G4double dydx[]   ) const
{
  G4double Field[3];   
  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
  
  G4cout  <<"EL_EQ RIGHT HAND SIDE!"<<G4endl;
  GetFieldValue(PositionAndTime, Field) ;
  EvaluateRhsGivenB( y, Field, dydx );
}


void  
G4El_EqRhs::SetChargeMomentumMass( G4double particleCharge, // e+ units
			            G4double ,                // MomentumXc
                                    G4double )               // particleMass
{
  fCof_val = particleCharge*eplus*c_light ; 
 
}