Since 2.9 release
Assembly function
Improved Pickling support
Discrete functions can now be directly pickled and will
be reconstructed with the grid on load.
The required JIT modules will also be
generated on load if they do not exist on the system.
For this to work one needs to use the dune.common.pickle
module as discussed in the Section on
pickling.
Paraview Reader
A paraview reader is added to the dune.fem package which can directly work
with the pickled files. UFL transformations
can be applied after loading the discrete functions in paraview.
For paraview to find the reader a environment variable needs to be set.
The correct command can be found running python -m dune.fem reader or
the correct env variable can be set by running
export PV_PLUGIN_PATH=`python -m dune.fem readerpath`
See https://gitlab.dune-project.org/dune-fem/dune-fem/-/merge_requests/581.
Sampler along Boundary
In addition to a lineSample and pointSample the dune.fem.utility
module now also provides a boundarySample function
boundarySample(gridFunction, boundaryId=None, boundaryDomain=None, order=-1)
See the help text of dune.fem.utility.boundarySample for details.
Point sampler returning (entity,local coordinate) for given global coordinate
Improved Dirichlet Boundary Indexing in UFL Forms
To restrict a domain integral to a part of the boundary given by a boundary id
one can now use ufl.ds(id) or multiply the integral with dune.ufl.BoundaryId(id)
(see the section on
Mixing different types of boundary conditions.
Note: we have also unified the
default boundary ids
when using a
dune.grid.cartesianDomain to always be the same as when using
dune.grid.structuredGrid.
This was not the case with some grid implementations.
