glass 2023.6 (30 Jun 2023)

--------------------------



- There is some support for simulating the deflections due to weak

gravitational lensing:



  - The `deflect()` function applies deflections to positions.



  - The `from_convergence()` function returns one or more other lensing

    fields given the convergence.



  - The `shear_from_convergence()` function is deprecated in favour of

    `from_convergence()`.



- The `glass` module is no longer a namespace package. The new

  `glass.ext` namespace is reserved for extensions instead. This is

  done to follow best practices, so that a bad extension can no longer

  break all of *GLASS* by mistake. The `glass.all` meta-module is no

  longer necessary.



- The point sampling functions `positions_from_delta()` and

  `uniform_positions()` now return an iterator over points. This

  has lead to orders-of-magnitude improvements in memory use and

  performance when simulating galaxies at Euclid/LSST densities.



- The ellipticity sampling functions `ellipticity_gaussian()` and

  `ellipticity_intnorm()` accept array inputs.



- A bug causing incorrect results from `effective_bias()` has been

  fixed.



-- 



Nicolas Tessore 



Dept of Physics & Astronomy 

University College London 







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