////////////////////////////////////////////////////////////////////
/// \class RAT::PosGen_Fill
///
/// \brief  Generates events in set filled volume(s).
///
/// \author Phil G Jones <p.g.jones@qmul.ac.uk>
/// \author Matthew Mottram <m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:\n
///     11 Jun 2012 : P.Jones - Refactor of GLG4PosGen.
///     04 July 2012 : D.Resnick - Use VolumeList to store volumes.
///     Sep 2013: A.Bialek - included scaling factor for number of tries
///          to find point within the volume(for details see DocDB - )
///     Oct 2016 : N. Barros - Fixed bug in sampling the center if there were
///                            off-center daughter volumes like the NCD anchors in the inner_av.
///                                   Closed issue #1392.
///     Dec 2016 : N. Barros - Fixed bug on bug fix transforming the local coordinates into global ones.
///
/// \details  Multiple volume fills can be added by calling the
///          /generator/pos/set command multiple times e.g:
///          /generator/pos/set 0 0 0
///          /generator/pos/set 1000 0 0
///          For events in the volumes located at the centre and 1m
///          on x axis.
///          The number of generated positions in each physical
///          volume is proportional to the volume (size).
////////////////////////////////////////////////////////////////////
#ifndef __RAT_PosGen_Fill__
#define __RAT_PosGen_Fill__

#include <RAT/GLG4PosGen.hh>
#include <RAT/VolumeList.hh>

#include <G4ThreeVector.hh>

#include <vector>

class G4VPhysicalVolume;
class G4VSolid;
class G4Navigator;

namespace RAT
{

class PosGen_Fill : public GLG4PosGen
{
public:
  /// Constructor sets the default db name
  PosGen_Fill( const std::string& dbname = std::string( "fill" ) ) : GLG4PosGen( dbname ) {}
  /// Destructor
  virtual ~PosGen_Fill() {}
  /// 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:
  VolumeList fVolumes; ///< List of volumes to generate events in
  std::vector<std::string> fStates; ///< List of states to build fVolumes
  /// The total volume of all the physical volumes to fill, in mm^3
  double fTotalVolume;
  /// A flag marking whether the list of volumes needs to be regenerated
  bool fListValid;

private:

};

} // namespace RAT

#endif