geo_vectors_fhicl.h

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/**
 * @file   geo_vectors_fhicl.h
 * @brief  Helpers for reading vectors from FHiCL files.
 * @author Gianluca Petrillo (petrillo@fnal.gov)
 * @date   March 24, 2017
 * @ingroup Geometry
 *
 * This library depends on ROOT GenVector.
 * In the CET link list in `CMakeLists.txt`, link to `${ROOT_GENVECTOR}`.
 *
 */

#ifndef LARCOREOBJ_SIMPLETYPESANDCONSTANTS_GEO_VECTORS_FHICL_H
#define LARCOREOBJ_SIMPLETYPESANDCONSTANTS_GEO_VECTORS_FHICL_H

// LArSoft libraries
#include "larcoreobj/SimpleTypesAndConstants/geo_vectors.h"

// framework libraries
#include "fhiclcpp/types/Atom.h"
#include "fhiclcpp/types/TupleAs.h"


namespace lar {

  /// LArSoft utilities for interface with FHiCL and its libraries.
  namespace fhicl {

    namespace geo {

      /// Atom object for reading length (centimeters).
      using Length_t = ::fhicl::Atom<::geo::Length_t>;


      /// Atom object for reading a 3D point or vector (centimeters).
      template <typename Point>
      using Point3D = ::fhicl::TupleAs
        <Point(::geo::Length_t, ::geo::Length_t, ::geo::Length_t)>;

      /// Atom object for reading a geometry point (centimeters).
      using Vector_t = Point3D<::geo::Vector_t>;

      /// Atom object for reading a geometry vector (centimeters).
      using Point_t = Point3D<::geo::Point_t>;

    } // namespace geo

  } // namespace fhicl

} // namespace lar

#endif // LARCOREOBJ_SIMPLETYPESANDCONSTANTS_GEO_VECTORS_FHICL_H