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File indexing completed on 2025-09-19 08:49:41
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file celeritas/alongstep/detail/AlongStepNeutralImpl.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include "corecel/Assert.hh" 0010 #include "corecel/Macros.hh" 0011 #include "corecel/Types.hh" 0012 #include "corecel/math/Quantity.hh" 0013 0014 #include "../AlongStep.hh" 0015 0016 namespace celeritas 0017 { 0018 //---------------------------------------------------------------------------// 0019 class CoreTrackView; 0020 0021 namespace detail 0022 { 0023 //---------------------------------------------------------------------------// 0024 /*! 0025 * Helper class for along-step kernel when no MSC is in use. 0026 */ 0027 struct NoMsc 0028 { 0029 //! MSC never applies to the current track 0030 CELER_FUNCTION bool 0031 is_applicable(CoreTrackView const&, real_type step) const 0032 { 0033 CELER_ASSERT(step > 0); 0034 return false; 0035 } 0036 0037 //! No updates needed to the physical and geometric step lengths 0038 CELER_FUNCTION void limit_step(CoreTrackView const&) const {} 0039 0040 //! MSC is never applied 0041 CELER_FUNCTION void apply_step(CoreTrackView const&) const {} 0042 }; 0043 0044 //---------------------------------------------------------------------------// 0045 /*! 0046 * Class that returns zero energy loss. 0047 */ 0048 struct NoELoss 0049 { 0050 //! This calculator never returns energy loss 0051 CELER_CONSTEXPR_FUNCTION bool is_applicable(CoreTrackView const&) 0052 { 0053 return false; 0054 } 0055 0056 //! No energy loss 0057 CELER_FUNCTION auto 0058 calc_eloss(CoreTrackView const&, real_type, bool) const -> decltype(auto) 0059 { 0060 return zero_quantity(); 0061 } 0062 0063 //! No slowing down 0064 static CELER_CONSTEXPR_FUNCTION bool imprecise_range() { return false; } 0065 }; 0066 0067 //---------------------------------------------------------------------------// 0068 } // namespace detail 0069 } // namespace celeritas
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