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Changelog

v0.10.0

  • Full refactoring of {py:class}dolfinx.fem.petsc.NonlinearProblem, which now uses the PETSc SNES backend. See the non-linear poisson demo for details.
  • {py:class}dolfinx.fem.petsc.LinearProblem now requires an additional argument, petsc_options_prefix. This should be a unique string identifier for each LinearProblem that is created.
  • Change how one reads in GMSH data with gmshio. See the membrane code for more details.
  • {py:meth}dolfinx.fem.FiniteElement.interpolation_points -> {py:attr}dolfinx.fem.FiniteElement.interpolation_points.
  • {py:mod}dolfinx.io.gmshio has been renamed to {py:mod}dolfinx.io.gmsh
  • Input to {py:func}dolfinx.fem.petsc.create_vector has changed. One should now call {py:func}dolfinx.fem.extract_function_spaces on the input form first.

v0.9.0

  • scale in {py:func}apply_lifting<dolfinx.fem.petsc.apply_lifting> has been renamed to alpha
  • Use dolfinx.fem.Function.x.petsc_vec as opposed to dolfinx.fem.Function.vector

v0.8.0

  • Replace all ufl.FiniteElement and ufl.VectorElement with the appropriate {py:func}basix.ufl.element
  • Replace {py:class}dolfinx.fem.FunctionSpace with {py:func}dolfinx.fem.functionspace

v0.7.2

v0.7.1

v0.7.0

  • Renamed dolfinx.graph.create_adjacencylist to {py:func}dolfinx.graph.adjacencylist
  • Renamed dolfinx.plot.create_vtk_mesh to {py:func}dolfinx.plot.vtk_mesh
  • Initialization of {py:class}dolfinx.geometry.BoundingBoxTree has been changed to {py:func}dolfinx.geometry.bb_tree
  • create_mesh with Meshio has been modified. Note that you now need to pass dtype np.int32 to the cell_data.
  • Update dolfinx petsc API. Now one needs to explicitly import {py:mod}dolfinx.fem.petsc and {py:mod}dolfinx.fem.nls, as PETSc is no longer a strict requirement. Replace petsc4py.PETSc.ScalarType with dolfinx.default_scalar_type in demos where we do not use {py:mod}petsc4py explicitly.

v0.6.0

  • Remove ipygany and pythreejs as plotting backends. Using panel.
  • Add gif-output to [chapter2/diffusion_code] and [chapter2/hyperelasticity].
  • Replace dolfinx.fem.Function.geometric_dimension with len(dolfinx.fem.Function)
  • Improve [chapter2/ns_code2] to have better splitting scheme and density.
  • Improve mesh quality in [chapter3/em].
  • jit_params and form_compiler_params renamed to *_options.

v0.5.0

  • Using new GMSH interface in DOLFINx (dolfinx.io.gmshio) in all demos using GMSH
  • Added a section on custom Newton-solvers, see [chapter4/newton-solver].
  • Various minor DOLFINx API updates. dolfinx.mesh.compute_boundary_facets -> {py:func}dolfinx.mesh.exterior_facet_indices with slightly different functionality. Use dolfinx.mesh.MeshTagsMetaClass.find instead of mt.indices[mt.values==value].
  • Various numpy updates, use np.full_like.
  • Change all notebooks to use jupytext to automatically sync .ipynb with .py files.
  • Add example of how to use DOLFINx in complex mode, see [chapter1/complex_mode].

0.4.1

  • No changes

0.4.0 (05.02.2021)

  • All pyvista plotting has been rewritten to use ipygany and pythreejs as well as using a cleaner interface.
  • dolfinx.plot.create_vtk_topology has been renamed to dolfinx.plot.create_vtk_mesh and can now be directly used as input to {py:class}pyvista.UnstructuredGrid.
  • dolfinx.fem.Function.compute_point_values has been deprecated. Interpolation into a CG-1 is now the way of getting vertex values.
  • Instead of initializing class with {py:class}Form<dolfinx.fem.Form>, use {py:func}form<dolfinx.fem.form>.
  • Instead of initializing class with {py:class}DirichletBC<dolfinx.fem.DirichletBC> use {py:func}dirichletbc<dolfinx.fem.dirichletbc>.
  • Updates on error computations in Error control: Computing convergence rates.
  • Added tutorial on interpolation of {py:class}ufl.core.expr.Expr in Deflection of a membrane.
  • Added tutorial on how to apply constant-valued Dirichlet conditions in Deflection of a membrane.
  • Various API changes relating to the import structure of DOLFINx

0.3.0 (09.09.2021)

  • Major improvements in Form compiler parameters, using pandas and seaborn for visualization of speed-ups gained using form compiler parameters.
  • API change: dolfinx.cpp.la.scatter_forward(u.x) -> u.x.scatter_forward
  • Various plotting updates due to new version of pyvista.
  • Updating of the Hyperelasticity demo, now using DOLFINx wrappers to create the non-linear problem
  • Internal updates due to bumping of jupyter-book versions
  • Various typos and capitalizations fixed by @mscroggs in PR 35.

0.1.0 (11.05.2021)

  • First tagged release of DOLFINx Tutorial, compatible with DOLFINx 0.1.0.