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IMagneticFieldSvc.h

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// $Header: /nfs/slac/g/glast/ground/cvs/GaudiKernel/GaudiKernel/IMagneticFieldSvc.h,v 1.1.1.1 2001/04/18 18:14:18 tlindner Exp $
#ifndef GAUDIKERNEL_IMAGNETICFIELDSVC_H
#define GAUDIKERNEL_IMAGNETICFIELDSVC_H


// Include files
#include "GaudiKernel/IService.h"
#include "GaudiKernel/StatusCode.h"


// Forward declarations
template <class TYPE> class SvcFactory;
class HepPoint3D;
class HepVector3D;


// Declaration of the interface ID ( interface id, major version, minor version) 
static const InterfaceID IID_IMagneticFieldSvc(80, 1 , 0); 


class IMagneticFieldSvc : virtual public IService   {

public:
  static const InterfaceID& interfaceID() { return IID_IMagneticFieldSvc; }

  // Get the magnetic field vector at a given point in space.
  // Input: Point3D - Point at which magnetic field vector is to be given.
  // Output: Vector3D - Magnectic field vector.
  // Return: StatusCode SUCCESS if calculation was performed.
  virtual StatusCode fieldVector( const HepPoint3D& xyz, HepVector3D& fvec ) const = 0;

};

#endif  // GAUDIKERNEL_IMAGNETICFIELDSVC_H

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