////////////////////////////////////////////////////////////////////
/// \class RAT::PosGen_Plane
///
/// \brief  Generates events on a plane.
///
/// \author Phil G Jones <p.g.jones@qmul.ac.uk>
/// \author Matthew Mottram <m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:\n
///     2013-10-31 : P. Jones - New file.\n
///
/// \details  Generate points on a predefined plane. Plane is defined
/// by a position, a normal and a max distance from the position.
///
////////////////////////////////////////////////////////////////////
#ifndef __RAT_PosGen_Plane__
#define __RAT_PosGen_Plane__

#include <RAT/GLG4PosGen.hh>

#include <G4ThreeVector.hh>

namespace RAT
{

class PosGen_Plane : public GLG4PosGen
{
public:
  /// Constructor sets the default db name
  PosGen_Plane( const std::string& dbname = std::string( "plane" ) ) : GLG4PosGen( dbname ), fMaxDisplacement(-1) {}
  /// Destructor
  virtual ~PosGen_Plane() {}
  /// Abstract interface for generating the position
  virtual void GeneratePosition( G4ThreeVector& argResult );
  /// Abstract interface for setting the state
  virtual void SetState( G4String newValues );
  /// Abstract interface for getting the state
  virtual G4String GetState() const;
protected:
  G4ThreeVector fPosition; ///< Centre of the plane
  G4ThreeVector fNormal; ///< Normal of the plane
  G4ThreeVector fX; ///< Arbitary X of the plane
  G4ThreeVector fY; ///< Arbitary Y of the plane
  double fMaxDisplacement; ///< Max displacement from the centre
};

} // namespace RAT

#endif