Version 0.4.2

Version 0.4.2 is a bugfix and minor feature update to Celeritas.

Key enhancements compared to version 0.4.1 are:

• Full reproducibility of results in Geant4 multithreaded mode
• A new CELER_KILL_OFFLOAD environment variable that immediately kills EM tracks to help estimate a maximum offloading speedup
• Support for Geant4-VecGeom conversion of parameterized volumes
• Support for Geant4 11.2

Important bug fixes:

• GCC 14 compatibility
• Support for ROOT-exported GDML booleans

New features

• Warn and set default threads when OpenMP and Geant4 MT might collide (@sethrj, #1056)
• Add environment variable to kill Celeritas-supported tracks in Geant4 (@amandalund, #1060)
• Support Geant4-VecGeom conversion of parameterized volumes (@sethrj, #1071)
• Save action times on multi-stream CPU celer-sim (@sethrj, #1065)
• Automatically calculate number of events in apps (@amandalund, #1072)
• Add option to use CLHEP and SI unit systems instead of Gaussian CGS (@sethrj, #1076)

Reviewers: @amandalund (4), @sethrj (2), @esseivaju (1), @sawenzel (1)

Bug fixes

• Fix celer-g4 primary generator MT reproducibility (@amandalund, #1057)
• Insert SortTrackAction when sorting by particle type (@esseivaju, #1059)
• Fix range constexpr (@sethrj, #1064)
• Ensure reproducibility when using MT Geant4 with Celeritas offloading (@amandalund, #1061)
• Fix conversion of boolean solids when the "left" solid is displaced (@sethrj, #1069)
• Use environment variables to control OpenMP behavior in celer-sim (@amandalund, #1073)
• Add support for [email protected] (@whokion, #1075)
• Fix CMake for linking CUDA RDC for executables (@pcanal, #1102)

Reviewers: @sethrj (6), @pcanal (1), @amandalund (1)

Documentation improvements

• Include documentation as mandatory CI (@sethrj, #1053)
• Remove deprecated code from v0.4 (@sethrj, #1063)
• Add additional documentation about fields (@sethrj, #1066)
• Update copyrights for 2024 (@sethrj, #1083)

Reviewers: @pcanal (3), @amandalund (2)

Minor internal changes

• Remove extra constructor templates in device ActionLauncher (@esseivaju, #1062)
• Rename GenericXsCalculator (@amandalund, #1081)
• Add algorithm for difference of squares and move is_monotonic_increasing() to utils (@amandalund, #1082)
• Clang-format entire repository (@sethrj, #1084)
• Fix link errors in edge cases and restore HIP testing (@sethrj, #1042)
• Fix and avoid including algorithms header for ROOT/CLING (@sethrj, #1087)
• Fix non-sticky CMake options (@sethrj, #1098)
• Add missing include needed in GCC 14 (@hartsw, #1110)

Reviewers: @amandalund (4), @sethrj (3), @pcanal (1)

Full Changelog: v0.4.1...v0.4.2