On Thu, 17 Jul, 2014 at 9:37 AM, Chris Richardson <[email protected]>
wrote:
It may seem obvious, but I want to be able to attach parameters to a
Mesh before it calls its 'build' method.
This is because I need to be able to choose a ghosting strategy in
parallel (at present it is set by a GlobalParameter).
A related issue has come up previosuly:
https://bitbucket.org/fenics-project/dolfin/issue/67/move-building-of-foomesh-to-factory
I was thinking of adding a constructor which can take a Parameters
argument to all Mesh constructors (i.e. including all
the Unit*Mesh constructors).
I'm not too keen on passing a Parameter object.
Advantages - flexibility, any future set of parameters can be
accommodated
- can remove current string arguments, like "diagonal" for
RectangleMesh
Disadvantages - user has to create a Parameters object if they want
to change the Mesh defaults
- cannot constrain set of allowed parameters in advance
Another (possible) disadvantage is when creating lots of lightweight
meshes.
Any alternative suggestions welcome.
A typical approach is to have 'generator' classes/functions, i.e.
create an empty Mesh, set some options, then generate, or call a
specific generator.
Garth
Chris
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