- Bornagain-announcements - lists.fz-juelich.de

Release 24.1
by Joachim Wuttke 30 Jun '26

30 Jun '26

Today, we released BornAgain-24.1. This minor release improves here and there over recent 24.0: Dependencies: - Require libheinz-4.1; this fixes a NaN from acos(1+eps). New functionality: - Slicing supported for all polyhedral form factors. - All polyhedral form factors allowed as Mesocrystal outer shape. - Real-space 3D viewer got "Save" button and optional beam visualization. Performance: - F(q) is reused for identical particles in Compound and Mesocrystal. - In the reciprocal-space mesocrystal mode, basis form factors are reused across detector pixels. Bug fixes: - Correct Bipyramid4 slicing. - Correct is-in-Mesocrystal computation for Pyramid3 and Pyramid6 outer shapes. - Correct slicing for rotated Compound, Mixture and CoreAndShell. - Correct material average for deposited and suspended particles. - IParticle::rotate now carried out around the particle reference point, so that rotate and translate commute. - Mesocrystal position variance now contributes to incoherent covariance. - Fit examples no longer crash in the final showSample3D call. More details in the CHANGELOG. Greetings from the BornAgain maintainer team: Ammar Nejati, Mikhail Svechnikov, Joachim Wuttke

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BornAgain 24 released
by Joachim Wuttke 20 May '26

20 May '26

Today, we published BornAgain 24. This release brings deep changes. Most importantly, we now fully concentrate our support on the BornAgain Python interface. The graphical user interface is withdrawn. This simplifies deployment. BornAgain can now be installed through the following channels: - Python package [1] for Linux and Windows - Compilation steered by homebrew recipe [2] for MacOS - Compilation from source (all operating systems) There are also important changes in the sample model. We remove the `Layout` class from the model hierarchy, make inter-particle structures direct children of `Layer`, and start supporting bulk 3D structures and random occupancy of particle sites. This release breaks Python scripts. We therefore offer a migration service: Send us your script from BornAgain 23 or earlier, and we will convert it to BornAgain 24 using an AI coding agent. For more details on these and other changes, see https://bornagainproject.org/news/release-24.0. For even more details, see the CHANGELOG. We thank our student intern Giorgi Tsartsidze for substantial contributions to this release. Best greetings from the BornAgain maintainer team: Ammar Nejati, Mikhail Svechnikov, Joachim Wuttke [1] https://pypi.org/project/BornAgain [2] https://jugit.fz-juelich.de/mlz/homebrew

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BornAgain 23 released
by Joachim Wuttke 06 May '25

06 May '25

This release responds to a change in an external interface: BornAgain 22 requires libcerf 2, BornAgain 23 requires libcerf 3. The roughness model API, which had changed in BornAgain 22, has been corrected to allow again for hurst=0 or correlation_length=0 (resulting in zero scattering). Besides that, some internal cleanup has been done, and the inspection tools plot_int and plot_dif (in directory devtools/view) have been repaired. Python scripts and GUI projects from BornAgain 22 will continue to work. Best greetings from the BornAgain maintainer team: Ammar Nejati, Mikhail Svechnikov, Joachim Wuttke

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BornAgain-22.1 released
by Joachim Wuttke 23 Apr '25

23 Apr '25

Dear BornAgain users: we released version 22.1. Release 22.0 was skipped because we mishandled deployment to PyPI. So this is major release 22, the result of a long development cycle with deep internal restructuring and cleanup. Altogether, we now achieve improved stability and functionality with 15% less lines of source code. Some highlights: The auto-generated Python bindings were simplified, and are now ready for NumPy 2. NumPy 1 continues to be supported. Simulations now return a unified data type Datafield. Plot functions in module ba_plot were simplified and unified. Documentation is provided in the online reference, chapters “Data types” and “Plotting”. Time-of-flight off-specular neutron scattering is now supported by classes LambdaScan and QzScan. In the sample model, class Sample replaces Multilayer. Class Roughness is now an attribute of Layer. The roughness model has become more versatile. Beside the previous default, now called SelfAffineFractalModel, there is a LinearGrowthModel that propagates real-space features from lower to upper interfaces. Otherwise interface-interface cross correlations can be set as a separate model component. New classes TanhTransient and ErfTransient are 1:1 replacements for the previous enum-based syntax. On the downside, all GUI project files compatibility is broken. For upgrading Python scripts, we provide for the first time a tool: upgrade-21-to-22.py. This tool, however, will fail if it encounters certain plot commands or class constructors that have no one-to-one correspondence in the new API. Beware that the semantics of the Spheroid constructor has changed: The arguments are now Rxy and Rz instead of Rxy and H. For a full list of changes see the CHANGELOG. Windows users who are working in Pyenv or Conda environments please be advised that a bug in Python 3.10 may cause a crash when a Python script is imported to the GUI unless certain environment variables are set, see here and here. We recommend upgrading to Python 3.11 or newer. Because of Apple’s increasingly restrictive policies we gave up on producing binary installer packages (bundles) for macOS. Mac users need to build BornAgain on their own machine. This is done easiest by using a "formula" from our Homebrew "tap". The build process is then steered by the Homebrew package manager. Just be prepared that it may take an hour or longer. Best greetings from the maintainer team: Ammar Nejati, Mikhail Svechnikov, Joachim Wuttke

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