////////////////////////////////////////////////////////////////////////
/// \class RAT::PosGen_FillShell
///
/// \brief Generate event vertices at random points within a spherical shell and contained in a specific volume.
///
/// \author Phil Jones (p.g.jones@qmul.ac.uk)
/// \author Matthew Mottram <m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:
///   -  File inherited with rat at start of SNO+
///   - 2014-11-26: Matt Strait - doxygen fixes
///
/// \details Syntax: /generator/pos/set <xyz coordinates of center of spheres> <rmin> <rmax> <volume name>
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_PosGen_FillShell__
#define __RAT_PosGen_FillShell__

#include <RAT/GLG4PosGen.hh>
#include <G4VPhysicalVolume.hh>
#include <vector>

namespace RAT
{
  class PosGen_FillShell : public GLG4PosGen
  {
  public:
    PosGen_FillShell(const char* arg_dbname = "fillshell");
    virtual void GeneratePosition(G4ThreeVector& argResult);
    void SetState(G4String newValues);
    G4String GetState() const;

  protected:
    G4VPhysicalVolume* FindPhysVolume(const std::string vol_name);
    void OffsetVolume(const std::string index, double& x, double& y, double& z);
    G4ThreeVector pos;
    std::vector<G4VPhysicalVolume*> pVolume;

    double ri;
    double ro;
    int max_iterations;
  };
} // namespace RAT

#endif