Nils Kohl authored Mar 27, 2019 and Martin Bauer committed Apr 26, 2019

- introduced AbstractField and AbstractAccess

Fixes #28

This restructuring allows for easier separation of modules into
separate repositories later. Also, now pip install with repo url can be
used.

The setup.py files have also been updated to correctly reference each
other. Module versions are not extracted from git state

- all branches are added up

boundary conditions can specify how the index list should be built:
- list coordinates of domain or boundary cells (previous always inner)
- list all links or only the first link

- removed warnings from generated code
- made generated code string deterministic, generating the same twice
  gives binary equally files now

- was not used consistently before
- symbol names are expected to be valid C identifiers
- for complicated field names, the latex_name of field should be used

- small (length < 5) arrays with shape and stride information had to be
  memcpy'd to the GPU before every kernel call
- instead of passing the information as arrays, the single elements are
  passed
- leads to more function arguments, but simplifies GPU kernel calls

-> changes in all backends required

- field access are now equal if their underlying fields compare as equal
  not only if the id of their fields are equal

- if a field access is printed in compass or index notation seems to
  depend on the sympy version
- removed doctests that rely on the printed form

- added isotropic version

- new functions to easily extract stencil coefficients and visualize them
- Moved stencil functions from lbmpy to pystencils

- hash function was not correctly implemented
- sometimes this caused a bug where latex version was not correctly displayed

- better latex display for indirect accesses
- new field type 'custom': only custom fields can be accessed indirectly
  no static bounds check possible for custom fields

- different approach in pystencils: absolute indexing

- SSA form is checked
- loop independence condition is checked
- bug fix in Field.create_generic when using index_shape

- flags can be force when setting boundaries, this is helpful for:
- setting up quantities (e.g. relaxation rate..) dependent on current
  flag configuration
- bit operation fix when pickling: function has to have the same name
  as the python object

- removed warnings
- added flake8 as CI target

Jan Hönig authored Apr 05, 2018 and Martin Bauer committed Apr 10, 2018

Fixed a bug in field.py

- test run again
- notebooks not yet

- assignment collection
- sympyextensions

- Previously sympy.Eq was used to represent assignments. However Eq
  represents equality not assignment. This means that sometimes sympy
  "simplified" an equation like a = a  to True,
-> replaced sp.Eq by pystencils.Assignment everywhere
- renamed EquationCollection to AssignmentCollection

for fields without index dimensions the indices (0,) and () have been
treated equivalently, but did not compare equal