////////////////////////////////////////////////////////////////////
/// \class RAT::FlatMap
///
/// \brief Useful tool for flatmap representation of the detector
///
/// \author Freija Descamps <fbdescamps@lbl.gov>
///
/// REVISION HISTORY:\n
///
///   7/14/15  FD     First version
///
///  \details  Some useful functions for the
///            flatmap representation of the detector. This code
///            is largely inspired by code from K. Clark.
///
////////////////////////////////////////////////////////////////////

#ifndef __RAT_FlatMap__
#define __RAT_FlatMap__

class TVector2;
class TVector3;

namespace RAT {
  // Return the transformed coordinates
  TVector2 TransformCoord(
                          const TVector3& V1,
                          const TVector3& V2,
                          const TVector3& V3,
                          const TVector2& A1,
                          const TVector2& A2,
                          const TVector2& A3,
                          const TVector3& P );

  void SphereToIcosahedron(
                           TVector3& pointOnSphere, // The spherical position
                           TVector2& resultPosition, // The returned position
                           const double totalLength, // Total size of the 2d grid (default to 1)
                           const double rotation); // Rotation: 0 for "Phil" style, 2.12 for "SNO" style
} // namespace RAT
#endif  //__RAT_FlatMap__