geocel/detail/LengthUnits.hh

0001 //----------------------------------*-C++-*----------------------------------//
0002 // Copyright 2024 UT-Battelle, LLC, and other Celeritas developers.
0003 // See the top-level COPYRIGHT file for details.
0004 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
0005 //---------------------------------------------------------------------------//
0006 //! \file geocel/detail/LengthUnits.hh
0007 //! \brief NOTE: only use inside geocel; prefer celeritas/Units.hh
0008 //---------------------------------------------------------------------------//
0009 #pragma once
0010
0011 #include "corecel/Config.hh"
0012
0013 #include "corecel/Types.hh"
0014
0015 #define CELER_ICRT inline constexpr real_type
0016
0017 namespace celeritas
0018 {
0019 namespace lengthunits
0020 {
0021 //---------------------------------------------------------------------------//
0022 #if CELERITAS_UNITS == CELERITAS_UNITS_CGS
0023 CELER_ICRT meter = 100;
0024 CELER_ICRT centimeter = 1;
0025 CELER_ICRT millimeter = 0.1;
0026 #elif CELERITAS_UNITS == CELERITAS_UNITS_SI
0027 CELER_ICRT meter = 1;
0028 CELER_ICRT centimeter = 0.01;
0029 CELER_ICRT millimeter = 0.001;
0030 #elif CELERITAS_UNITS == CELERITAS_UNITS_CLHEP
0031 CELER_ICRT meter = 1000;
0032 CELER_ICRT centimeter = 10;
0033 CELER_ICRT millimeter = 1;
0034 #else
0035 #    error "CELERITAS_UNITS is undefined"
0036 #endif
0037
0038 //---------------------------------------------------------------------------//
0039 }  // namespace lengthunits
0040 }  // namespace celeritas