This is a VOTE in order to release version 4.0 of the Hipparchus library.
Version 4.0 is a major release.
Highlights in the 4.0 release are:
- Add a (backwards) smoother counterpart to the linear Kalman, extended Kalman and unscented filters.
- Add inverse transform method to UnscentedTransformProvider.
- Added reset mechanism in ODE event detection.
- Added FieldPolynomialFunctionLagrangeForm.
- Added native way to stack an independent variable in (Field)Gradient.
- Add boolean for propagation direction in (Field)AdaptableInterval.
- Added getHipparchusVersion method to MathUtils.
- Fixed issue with open boundaries in Euclidean 2D-polygons.
- Increased dimension of directions numbers in Sobol sequence generation.
- Added FieldBivariateGridInterpolator, FieldBilinearInterpolator and FieldBilinearInterpolatingFunction.
- Fixed JUnit pioneer dependency version not compatible with Java 8.
- Changed CDN for faster site load.
- Added moveTowards method to Point interface.
- Rename RungeKutta(Field)Integrator as FixedStepRungeKutta(Field)Integrator.
- Improved robustness of BSP tree operations.
- Rename DEFAULT_MAXCHECK as DEFAULT_MAX_CHECK.
- Made constructors of abstract classes protected when they were public.
- Removed obsolete hipparchus-migration module.
- Added getAddendum() to CalculusFieldElement interface.
- Added getLocalizedString(baseName, key, locale) with default implementation to Localizable interface.
- Migrated tests from JUnit 4 to JUnit 5.
The release candidate 1 can be found on the GitHub repository as tag 4.0-RC1 in the release-4.0 branch.
Source and binary archives are available using the staged web site downloads page at Downloads | Hipparchus.
Note that the index page at /downloads does not show the 4.0 release, as it has not been voted yet.
The release notes can be read here: Hipparchus Release Notes | Hipparchus.
Maven artifacts are available at Index of /repositories/orghipparchus-1044
The votes will be tallied in at least 72 hours for now, after 2025-03-19T18:00:00Z (this is UTC time).