dolfin team mailing list archive

[Johan Hake <johan.hake@xxxxxxxxx>]

The abaqus plugin does not write anything to the mesh data structure. It 
generates a an additional file. 

I think this is what mesh converter should do. It creates the file 
materials.xml, but that guy is just a MeshFunction over cells.

I have not tested this but this is my impression by just scanning the code.

Johan

On Wednesday March 23 2011 16:26:10 Anders Logg wrote:
> Note that "material" is not recognized by DOLFIN. It will be stored
> but there is nothing in DOLFIN that will kick in an do anything with
> this data (although it can be used from a user program).
> 
> A list of which data is recognized by DOLFIN (like "cell_domains") is
> listed in MeshData.h:
> 
> /// The class MeshData is a container for auxiliary mesh data,
>   /// represented either as MeshFunctions over topological mesh
>   /// entities, arrays or maps. Each dataset is identified by a unique
>   /// user-specified string. Only uint-valued data are currently
>   /// supported.
>   ///
>   /// The following named mesh data are recognized by DOLFIN:
>   ///
>   /// Boundary indicators
>   ///
>   ///   "boundary_facet_cells"   - Array<uint> of size num_facets
>   ///   "boundary_facet_numbers" - Array<uint> of size num_facets
>   ///   "boundary_indicators"    - Array<uint> of size num_facets
>   ///   "material_indicators"    - MeshFunction<uint> of dimension D
>   ///
>   /// Subdomain indicators
>   ///
>   ///   "cell_domains"           - MeshFunction<uint> of dimension D
>   ///   "interior_facet_domains" - MeshFunction<uint> of dimension D - 1
>   ///   "exterior_facet_domains" - MeshFunction<uint> of dimension D - 1
>   ///
>   /// Facet orientation (used for assembly over interior facets)
>   ///
>   ///   "facet orientation" - MeshFunction<uint> of dimension D - 1
>   ///
>   /// Boundary extraction
>   ///
>   ///   "vertex map" - MeshFunction<uint> of dimension 0
>   ///   "cell map"   - MeshFunction<uint> of dimension D
>   ///
>   /// Mesh partitioning
>   ///
>   ///   "global entity indices %d" - MeshFunction<uint> of dimension 0, 1,
> ..., D ///   "exterior facets"          - MeshFunction<uint> of dimension
> D - 1 ///   "num global entities"      - Array<uint> of size D + 1
>   ///   "overlap"                  - vector mapping
>   ///
>   /// Sub meshes
>   ///
>   ///   "global vertex indices" - MeshFunction<uint> of dimension 0
>   ///
>   /// Mesh coloring
>   ///
>   ///   "colors-%D-%d-%1"   - MeshFunction<uint> of dimension D with 
> colors based on connectivity %d ///   "num colored cells" - Array<uint>
> listing the number of cells of each color ///   "colored cells %d"  -
> Array<uint> of cell indices with colors 0, 1, 2, ...
> 
> 
> --
> Anders
> 
> On Wed, Mar 23, 2011 at 04:12:40PM -0700, Johan Hake wrote:
> > It looks like abacus supports writing of Meshfunctions for materials and
> > such.
> > 
> > Look in:
> >   site-packages/dolfin/mesh/meshconverter.py
> >   
> >   ...
> >   
> >   def _abaqus(...):
> >     ...
> >     handler.start_meshfunction("material", 3, num_entities)
> >     # Each material is associated with a number of element sets
> >     
> >     for i, matname in enumerate(materials):
> >         try: elsetids = material2elsetids[matname]
> >         
> >         except KeyError:
> >             # No elements for this material
> >             continue
> >         
> >         # For each element set associated with this material
> >         elsets = []
> >         
> >         for eid in elsetids:
> >             try: elsets.append(eid2elset[eid])
> >             
> >             except KeyError:
> >                 handler.error("Material '%s' is assigned to undefined
> >                 element
> > 
> > "
> > 
> >                         "set '%s'" % (matname, eid))
> >         
> >         for elset in elsets:
> >             for elemid in elset:
> >                 handler.add_entity_meshfunction(elemids.index(elemid), i)
> >     
> >     handler.end_meshfunction()
> > 
> > I guess something like this needs to be added to the
> > 
> >   def gmsh2xml
> > 
> > function.
> > 
> > Johan
> > 
> > On Wednesday March 23 2011 15:59:05 Neilen Marais wrote:
> > > Question #150226 on DOLFIN changed:
> > > https://answers.launchpad.net/dolfin/+question/150226
> > > 
> > > Neilen Marais posted a new comment:
> > > Anders,
> > > 
> > > I think I could cook up a patch, but I have searched (in vain) for a
> > > description of the dolfin xml format. If you could point me in the
> > > right direction I'm sure I could have a patch done in no time!
> > > 
> > > Thanks
> > > Neilen
> > 
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