///////////////////////////////////////////////////////////////////////////////
/// \class RAT::GeoCanSourceFactory
///
/// \brief Geometry for the can source
///
/// \author Logan Sibley <lsibley@ualberta.ca> -- contact person
///
/// REVISION HISTORY:\n
///   26/07/2010 : L. Sibley - First version \n
///   11/08/2010 : L. Sibley - New pmt model \n
///   28/07/2011 : L. Sibley - Added light guide \n
///   11 Nov 2014: Matthew Strait - Removed unsed variable
///
/// \details Construct the can source, consisting of two can layers surrounding a
///         PMT and small plastic scintillator disk (button). To load this
///         geometry into the simulation, use:
///
///              /rat/db/load geo/CanSource.geo
///
///         All of the layers scale according to the PMT and PMT base radius and
///         height, the light guide height, and the button thickness (in mm).
///         These dimensions, as well as the thickness and material of each can
///         layer (G4_POLYOXYMETHYLENE by default (Delrin)), may be changed in a
///         RAT macro using:
///
///              /rat/db/set GEO[canSource] outerCanMaterial "stainless_steel"
///              /rat/db/set GEO[canSource] pmtHeight 95.0
///              etc...
///
///         This geometry is intended to be used to study calibration of SNO+
///         using a gamma-emitting source placed at the centre of the
///         scintillating disk. Either a decaychain or decay0 generator is used
///         to generate an event, for example:
///
///              /generator/add decaychain 60Co:point:poisson::screen
///
///         The centre of the scintillating button is, by default, placed at the
///         centre of the liquid scintillator volume (scint). Thus, to run the
///         can source at the centre of the detector, use:
///
///              /generator/pos/set 0 0 0
///
///         If you want to shift the position of the can source from the centre
///         of the detector, then specify it in the data/geo/CanSource.geo file:
///
///              canPosition: [x, y, z],
///
///         The dimensions and materials, as above, may also be changed in this
///         file. The can position cannot be changed inside the RAT macro. If
///         the can position is shifted, note that the position generator should
///         then also be shifted to the same x and y as the can source, and z
///         shifted down by 1/2 the pmt height plus 1/2 the pmt base height plus
///         1/2 the light guide height.
///
///         Note that all volumes are completely flush. Also, if the light guide
///         height is set to 0.0, then it is not built.
///
///////////////////////////////////////////////////////////////////////////////

#ifndef __RAT_GeoCanSourceFactory__
#define __RAT_GeoCanSourceFactory__

#include <RAT/GeoFactory.hh>
#include <G4VPhysicalVolume.hh>

namespace RAT {

  class GeoCanSourceFactory : public GeoFactory {
  public:
    GeoCanSourceFactory() : GeoFactory("CanSource") {};
// Return the can source physical volume
/// @param[in] checkOverlaps when placing
    virtual void Construct(DBLinkPtr table,
                           const bool checkOverlaps );

  private:
    bool fbuildLightGuide;
    float fpmtRadius, fpmtHeight;
    float fpmtBaseRadius, fpmtBaseHeight;
    float flightGuideButtonRadius, flightGuidePmtRadius, flightGuideHeight;
    float finnerCanThickness, fouterCanThickness, fbuttonThickness;
    float finnerCanHalfHeight, fouterCanHalfHeight;
    float finnerCanRadius, fouterCanRadius, fbuttonRadius;
  };

} // namespace RAT

#endif