This is the alpLab fork of openEMS, maintained for integration into Signex as the primary PCB electromagnetic field solver.

Upstream: https://github.com/thliebig/openEMS
Upstream Website: https://openEMS.de
Upstream Docs: https://docs.openEMS.de

All changes are kept minimal and upstreamable.

• Replace all exit() calls with exception hierarchy (openEMS_SetupError, openEMS_AllocationError, openEMS_InternalError) for safe shared-library use
• Replace volatile with std::atomic for proper thread safety in multi-threaded engine
• Fix setlocale race conditions with RAII ScopedNumericLocale guard
• SnapToMeshLine O(N) linear search replaced with O(log N) binary search (~14x speedup)
• Fix diff_pow and m_LM_pos[n] memory leaks, size_t overflow
• Merged upstream WIP: multi-threaded SAR (IEEE/IEC compliant), HDF5 improvements, arraylib

• Fully 3D Cartesian and cylindrical coordinates graded mesh
• Multi-threading, SIMD (SSE) and MPI support for high speed FDTD
• Octave/Matlab and Python interface
• Dispersive material (Drude/Lorentz/Debye type)
• Lumped RLC elements, conducting sheet model
• MSL/Stripline/CPW/Waveguide ports with S-parameter extraction
• Field dumps in time and frequency domain as VTK or HDF5 file format
• Near-to-far-field (NF2FF) transformation
• Multi-threaded SAR calculation with IEEE/IEC compliance

pacman -S mingw-w64-x86_64-{gcc,cmake,boost,hdf5,vtk,tinyxml,cgal,nlohmann-json}

mkdir -p build && cd build
cmake .. -G "MinGW Makefiles" -DCMAKE_INSTALL_PREFIX=../../install
mingw32-make -j$(nproc) install

openEMS is licensed under the terms of the GPLv3, see http://www.gnu.org/licenses/.