CHANGELOG.md

Changelog

All functional changes to the project are documented in this file.

2026.1 (29 Jan 2026)

• gh-1034: Expose glass.healpix module (#1035)
• gh-923: migrate from mypy to ty (#926)
• gh-977: Actually test deprecated fields.py functions (#1033)
• gh-977: Port remaining functions in fields.py (#979)
• gh-903: Port galaxies.py to support jax (#919)
• gh-1002: Add a section to the contributing guidelines on regression (1019)
• gh-996: Fix bug in apply_along_axis (#997)
• gh-969: determine xp when function called in XPAdditions (#994)
• gh-990: fix vmap_galactic_ecliptic porting (#991)
• gh-970: Move rng code to its own module (#971)
• gh-960: move healpy/healpix work to own module (#968)
• gh-902: port cls2cov, spectra_indices, _glass_to_healpix_alm in fields.py (#963)
• gh-958: make positions_from_delta Array API compatible (#959)
• gh-907: Port points.uniform_positions to support jax (#955)
• gh-908: Port shapes.py to support jax (#954)
• gh-906: Port observations.vmap_galactic_ecliptic to array-api (#953)
• gh-943: bump array-api-compat and fix tests (#944)
• gh-186: add GLASS extensions to documentation (#927)
• gh-905: Port lensing.py functions to array-api with jax (#925)
• gh-921: pin pre-commit to oldest support Python version (#924)
• gh-901: Port algorithm.nnls to support jax (#918)
• gh-914: fix versions for array backends for 3.10 (#916)
• gh-910: consistent definition of displacement (#911)
• gh-880: Fix inconsistencies in the documentation rendering (#889)
• gh-637: Use xpx.at in fields.cls2cov (#874)
• gh-824: expose glass.arraytools module (#857)

2025.3 (2 Dec 2025)

• gh-323: add uv support in nox and CI (#801)
• gh-410: Port straightforward functions in observations (#677)
• gh-417: Improve type rendering in the documentation (#746)
• gh-683: rewrite dispatch mechanism for GRF transformations (#697)
• gh-700: remove typing-extensions dependency (#701)
• gh-705: add displace() and displacement() (#708)
• gh-720: add warning if nearcorr has no convergence (#757)
• gh-721: Port RNG functions in shapes.py (#722)
• gh-723: Port RNG functions in galaxies.py (#724)
• gh-731: create spherical harmonic utilities module (#761)
• gh-734: Port points.uniform_positions (#736)
• gh-747: Force nox to default to 3.13 (#748)
• gh-793: remove inplace option to multalm (#797)
• gh-836: consistent setting of seed throughout (#837)
• gh-661: Add Python 3.14 support (#662)

2025.2 (21 Oct 2025)

• gh-578: mutable argument should be empty list rather than None (#579)
• gh-552: add docs on all-contributors (#565)
• gh-573: add keyword rng to functions in notebooks (#574)
• gh-583: fix flakiness of test_generate (#584)
• gh-575: bring back inv_triangle_number (#577)
• gh-572: make multalm private (#576)
• gh-487: reorder alms in _generate_grf to glass ordering (#533)
• gh-568: convert _weight funcs to classes for _windows funcs (#589)
• gh-495: allow zeff to be computed automatically (#590)
• gh-566: add example on galaxy redshift distributions (#567)
• gh-616: use position_weights() in galaxy redshift example (#617)
• gh-124: use cosmology.api over the cosmology package (#537)
• gh-621: bump array-api-strict version to 2024.12 (#625)
• gh-639: fix compute_gaussian_spectra() for empty spectra (#640)
• gh-652: make array-api-strict an official dependency (#653)
• gh-407: Port functions in fields.py (#642)
• gh-633: switch to dependency-groups (#634)
• gh-408: porting straightforward functions in shells (#643)
• gh-667: Make JAX an optional dependency as intended (#672)
• gh-409: Port straightforward functions in points (#663)
• gh-691: rename envvar to ARRAY_BACKEND (#692)
• gh-693: Add script to generate release notes (#694)

2025.1 (21 Feb 2025)

• gh-163: drop Python 3.9 & NumPy < 2.1.1 support (#391)
• gh-368: add type overloading for lensing.from_convergence (#395)
• gh-384: rename all internal functions to trapezoid over trapz (#392)
• gh-440: remove scipy as a test dependency (#462)
• gh-443: if should be elif in fixed_zbins (#444)
• gh-445: place all public function in __all__ (#446)
• gh-465: enable installing glass through git archives (#483)
• gh-470: instructions to install using conda (#481)
• gh-478: glass.core.array -> glass.arraytools (#524)
• gh-493: add module for Gaussian random fields (#494)
• gh-496: functions for legacy mode (#497)
• gh-501: change imports to be directly from glass (#512)
• gh-504: deprecate old generator functions (#523)
• gh-508: create standalone bibliography page (#518)
• gh-509: inv_triangle_number -> nfields_from_nspectra (plus make it public) (#527)
• gh-513: make algorithm a public module (#514)

2024.2 (15 Nov 2024)

• gh-188: add docstrings to all functions and tidy docs (#381)
• gh-336: support Python 3.13 (#337)
• gh-358: add static types support (#368)
• gh-131: rename gaussian_gls to discretized_cls (#345)
• gh-328: efficient resampling in ellipticity_ryden04 (#341)
• gh-137: deprecate redshifts_from_nz in favor of redshifts (#333)
• gh-328: fix shape mismatch bug in ellipticity_ryden04 (#332)
• gh-315: add broadcasting rule in ellipticity_ryden04 + tests (#317)
• gh-198: enforce python>3.8 & numpy>1.21 (#326)
• gh-260: remove glass.core.constants (#261)
• gh-107: add all public functions/classes under glass namespace (#221)
• gh-168: move examples into repository (#169)
• gh-156: add FITS catalogue writer tool (#158)

2024.1 (16 Jul 2024)

Added

• A new function combine() that evaluates the linear combination of radial window functions with given weights.
• A new function effective_cls() which combines power spectra using a list of weights, which models what happens in the simulation.
• A new function position_weights() that returns weights for effective_cls() to model the result of positions_from_delta().
• A new function multi_plane_weights() that returns weights for effective_cls() to model the result of MultiPlaneConvergence.
• The glass.core.algorithm module.
• The new partition(method="nnls") function computes a partition with non-negative contributions for each shell.
• Function redshifts() to sample redshifts following a radial window function.

Changed

• The default method for partition() is now "nnls".
• Both partition(method="nnls") and partition(method="lstsq") now have an additional integral constraint so that the sum of the partition recovers the integral of the input function.
• The output of partition() now has the shells axis as its first.

Fixed

• Now uses the updated intersphinx URL for the GLASS examples.
• A bug in effective_cls() that caused arrays to be one entry too long if lmax was not given explicitly.
• A bug in partition() with the default method.
• partition() now works correctly with functions having extra axes.

2023.7 (1 Aug 2023)

Added

• Function getcl() to return angular power spectra by index from a list using GLASS ordering.
• New linear_windows() and cubic_windows() window functions for shells.

Changed

• The gaussian_phz() function now accepts bounds using lower= and upper= keyword parameters.
• The partition() function now returns an array of weights to approximate the given function by the windows.

2023.6 (30 Jun 2023)

Added

• deflect() applies deflections to positions
• from_convergence() returns other lensing fields given the convergence
• A new glass.ext namespace, reserved for extensions

Changed

• The glass module is no longer a namespace package
• The point sampling functions positions_from_delta() and uniform_positions() now return an iterator
• ellipticity_gaussian() and ellipticity_intnorm() accept array inputs
• Use pyproject.toml for packaging

Deprecated

• shear_from_convergence() is deprecated in favour of from_convergence()

Removed

• The glass.all meta-module is no longer necessary

Fixed

• Incorrect extrapolation in glass.core.array.trapz_product(), causing a bug in glass.points.effective_bias()

2023.5 (31 May 2023)

Added

• Allow dimensional input to the sampling functions in glass.points (#80)
• The redshifts_from_nz() function supports count arrays (#83)

Changed

• Position sampling returns counts alongside points (#80)
• redshifts_from_nz() no longer returns gal_pop (#83)
• Move core functionality that is used by other, user-facing modules into the glass.core module (#88)

Removed

• Remove profiling functions (#89)

2023.2 - 1 Mar 2023

Added

• The glass.lensing.MultiPlaneConvergence.add_window method to add a convergence plane given by a window function.
• The glass.shells module for shell definitions.
• User functions to save and load Cls
• This changelog added to keep track of changes between versions

Changed

• Instead of an array of shell boundaries and MatterWeights, the shells are entirely defined by a RadialWindow window function.
• The glass.lensing.multi_plane_matrix function now takes a sequence of window functions.
• The arguments of glass.lensing.MultiPlaneConvergence.add_plane are called zsrc and wlens instead of the more ambiguous z and w. The properties MultiPlaneConvergence.z and MultiPlaneConvergence.w that return these values are similarly changed.
• The glass.points.effective_bias now takes a single window function as input and computes its effective bias parameter.
• Some type hints added to library functions

Removed

• The glass.lensing.multi_plane_weights function, replaced by the glass.lensing.MultiPlaneConvergence.add_window method.
• The glass.galaxies.constant_densities and density_from_dndz functions, since densities can now easily be partitioned by window functions for shells.
• The zmin, zmax parameters of glass.galaxies.redshifts_from_nz, for the same reason.
• The glass.math.restrict_interval function, as shells are now defined by window functions instead of sharp intervals.
• The glass.matter module, in favour of the more appropriately-named glass.shells module.

2023.1 - 31 Jan 2023

Added

• Initial wide release for GLASS paper