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// $Id: B5MagneticField.cc 77656 2013-11-27 08:52:57Z gcosmo $
//
/// \file B5MagneticField.cxx
/// \brief Implementation of the B5MagneticField class

#include "B5MagneticField.hh"

#include "G4GenericMessenger.hh"
#include "G4SystemOfUnits.hh"
#include "globals.hh"

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B5MagneticField::B5MagneticField()
  : G4MagneticField(), fMessenger(0), fBy(1.0 * tesla)
{
  // define commands for this class
  DefineCommands();
}

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B5MagneticField::~B5MagneticField() { delete fMessenger; }

void B5MagneticField::GetFieldValue(const G4double[4], double* bField) const
{
  bField[0] = 0.;
  bField[1] = fBy;
  bField[2] = 0.;
}

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void B5MagneticField::DefineCommands()
{
  // Define /B5/field command directory using generic messenger class
  fMessenger = new G4GenericMessenger(this, "/B5/field/", "Field control");

  // fieldValue command
  G4GenericMessenger::Command& valueCmd = fMessenger->DeclareMethodWithUnit(
    "value", "tesla", &B5MagneticField::SetField, "Set field strength.");
  valueCmd.SetParameterName("field", true);
  valueCmd.SetDefaultValue("1.");
}

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