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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/TimeUpdater.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include "celeritas/global/CoreTrackView.hh" 0010 0011 namespace celeritas 0012 { 0013 namespace detail 0014 { 0015 //---------------------------------------------------------------------------// 0016 /*! 0017 * Update the lab frame time. 0018 */ 0019 struct TimeUpdater 0020 { 0021 inline CELER_FUNCTION void operator()(CoreTrackView const& track); 0022 }; 0023 0024 //---------------------------------------------------------------------------// 0025 // INLINE DEFINITIONS 0026 //---------------------------------------------------------------------------// 0027 CELER_FUNCTION void TimeUpdater::operator()(CoreTrackView const& track) 0028 { 0029 auto sim = track.sim(); 0030 0031 // The track errored within the along-step kernel 0032 if (sim.status() == TrackStatus::errored) 0033 return; 0034 0035 auto particle = track.particle(); 0036 real_type speed = native_value_from(particle.speed()); 0037 CELER_ASSERT(speed >= 0); 0038 if (speed > 0) 0039 { 0040 // For very small energies (< numeric_limits<real_type>::epsilon) 0041 // the calculated speed can be zero. 0042 real_type delta_time = sim.step_length() / speed; 0043 sim.add_time(delta_time); 0044 } 0045 } 0046 0047 //---------------------------------------------------------------------------// 0048 } // namespace detail 0049 } // namespace celeritas
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