mag::GlobalMagneticField Class Reference

#include "GlobalMagneticField.h"

Inheritance diagram for mag::GlobalMagneticField:

Public Member Functions
	GlobalMagneticField ()
virtual	~GlobalMagneticField ()
virtual void	GetFieldValue (const G4double Point[4], G4double *Bfield) const

Private Attributes
const mag::MagneticFieldService *	_bFieldHandle

Detailed Description

Definition at line 20 of file GlobalMagneticField.h.

Constructor & Destructor Documentation

mag::GlobalMagneticField::GlobalMagneticField ( )

explicit

Definition at line 28 of file GlobalMagneticField.cxx.

  {
    art::ServiceHandle<mag::MagneticFieldService> bField;
    _bFieldHandle = &*bField;
  }

virtual mag::GlobalMagneticField::~GlobalMagneticField ( )

inlinevirtual

Definition at line 25 of file GlobalMagneticField.h.

References GetFieldValue().

{};

Member Function Documentation

void mag::GlobalMagneticField::GetFieldValue ( const G4double  Point[4], G4double *  Bfield  ) const

virtual

Definition at line 35 of file GlobalMagneticField.cxx.

References mag::MagneticFieldService::provider().

Referenced by ~GlobalMagneticField().

                                                                                         {

    //Check provider units (geant4 uses mm, your framework can use another unit...)
    const auto *pProvider = _bFieldHandle->provider();

    G4ThreeVector point(Point[0], Point[1], Point[2]);//should be in mm
    const G4ThreeVector field = pProvider->FieldAtPoint(point);//should return tesla

    Bfield[0] = field.x();
    Bfield[1] = field.y();
    Bfield[2] = field.z();

    // std::cout << "Returned field " << Bfield[0] << ", " << Bfield[1] << ", " << Bfield[2] << std::endl;

    return;
  }

Member Data Documentation

const mag::MagneticFieldService* mag::GlobalMagneticField::_bFieldHandle

private

Definition at line 32 of file GlobalMagneticField.h.

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The documentation for this class was generated from the following files:

• nug4/G4Base/GlobalMagneticField.h
• nug4/G4Base/GlobalMagneticField.cxx