Version 2.0.0-beta10

What's Changed

Another quick release to fix a significant bug in get_group_array with use_index=True, #814

Full Changelog: v2.0.0-beta.9...v2.0.0-beta.10

Version 2.0.0-beta.9

What's Changed

An emergency fix to address a race issue with getting halos on multiple threads at once #813

Full Changelog: v2.0.0-beta.8...v2.0.0-beta.9

v2.0.0-beta.8

What's Changed

This release gathers together the latest work towards a release of pynbody v2:

• Update all units to more modern values, and fix swift scalefactor dependencies. Note that the update to units is a breaking change. #801
• Updating/modernising large parts of the documentation and streamlining interface elements, which includes updating the names of some parameters #785, #805, #806, #807, #808, #809, #810, #811
• Add underlying functionality for improved quiver key in velocity plots #804
• Fix a bug with shared memory arrays being deleted too soon #812

Full Changelog: v2.0.0-beta.7...v2.0.0-beta.8

Version 2.0.0-beta.7

Enhancements

• HBT+ multiple files implementation in #787
• Enable smoothing at double precision, #795
• Update KDTree to warn / disable periodicity when an issue occurs, instead of refusing to build, #798

Bug fixes

• Allow loading adaptahop halos even if DM is not the first particle family, #784
• Fix bug where HaloCatalogue.load_copy would not work, #796
• Fix bug where Gadget HDF file extensions for spanned files were incorrectly calculated. Furthermore, Gadget HDF files would not load if some particle types were absent from some files. #800

Miscellaneous

• Revert back to using posix_ipc module for shared memory support in #790

Full Changelog: v2.0.0-beta.5...v2.0.0-beta.7

v2.0.0-beta.5

What's Changed

• Return children from SubfindHDF get_properties_all_halos by @apontzen in #783

Full Changelog: v2.0.0-beta.4...v2.0.0-beta.5

v2.0.0-beta.4

What's Changed

• Support for swift, velociraptor and HBT+ (#757, #779, #780)
• Add standardised mechanism for getting all halo properties by @apontzen in #777
• Make cuboid filters wrap around the box and improve implementation (#780)

Full Changelog: v2.0.0-beta.3...v2.0.0-beta.4

Version 2.0.0-beta.3

What's Changed

• Fix a bug with reading gadget4-subfind-hdf tree information, which led to silent failures to load subfind catalogues
• Fixes a bug where tipsy files silently didn’t load if warnings were set to raise and there was no paramfile
• Reorganised the test data archive

Full Changelog: v2.0.0-beta.2...v2.0.0-beta.3

Version 2.0.0-beta.2

Bug fix

Fixes getting halo properties in physical units (#775)

Version 2.0.0-beta

What's Changed

Near complete re-implementation of the halo catalogue class hierarchy (#763)

This is a breaking change, and as such the major version number of pynbody has increased. Regular users probably don't want to install a v2 release at this early stage, and as such it has been flagged as a beta.

• Halo classes are no longer imported directly into the pynbody.halo namespace.
• Users may now request a particular halo finder, or list of halo finders, by passing a priority kwarg to SimSnap.halos()
• HaloCatalogue.precalculate() has been renamed to HaloCatalogue.load_all()
• Halo classes supporting child/parent relationships now expose a .subhalos property, in which the child halos are enumerated
• Behind the scenes, the mapping from iords to file offsets has been improved and unified across all HaloCatalogue subclasses
• GrpCatalogue has been renamed to HaloNumberCatalogue to better reflect its meaning
• AHFCatalogue no longer renumbers the halos using a one-based scheme by default. If AHF has written out halo numbers, these are used by default; if it has not written out halo numbers, a zero-based indexing is used. Users can pass halo_numbers='v1' to halos() to obtain the old behaviour
• The ability to run halo finders has been removed (it anyway only ever worked for AHF, and even then was a bit flakey)

Full Changelog: v1.6.0...v2.0.0-beta

Version 1.6.0

What's Changed

Significant enhancements to the KDTree (#769):

• pynbody's sphere filters now make use of the KDTree to greatly enhance extracting spheres from large simulations.
• KDTrees will not automatically be built, so you should call f.build_tree() before f[pynbody.filt.Sphere(...)] to obtain the speed-up. Building the tree takes a while, so this is only worth doing if a large number of spheres will be extracted.
• KDTrees are now built in parallel, significantly speeding up operations that need them (such as SPH smoothing)
• KDTree data is now stored in numpy arrays, so it can be inspected from python and also can be stored in shared memory

Full Changelog: v1.5.2...v1.6.0