[Dune] YaspGrid refinement question

[Andreas Dedner]

I far as I can see it, this is a bug in YASP.
I understand that preAdapt only returns false if
a call to adapt will lead to no modification of the
grid. The default implementation returns false and that
is used in YASP. The default implementation for adapt
is of course to do nothing - so this is consistent.
Yhe implementation of adapt on YASP is to call a 
globalRefine - independent of any marker or anything
of that sort.
I think that this is not intuitive behaviour and can
be quite problematic in adaptive computations since
the grid is globally refined each time adapt is called.
I had assumed that a grid with no local
adaptation (as given by the Capabilities) does nothing
if adapt is called.
But prehaps I misundersood the code...
Andreas
On Tue, 3 Mar 2009 17:15:49 +0100 (CET)
 Christian May <cmay at phys.ethz.ch> wrote:
> Dear developers,
> 
> as I understand it, preAdapt() should return true if an
> entity of the grid has been marked for refinement by the
> mark() method.
> In the attached program, all entities are marked.
> However, if I run it, it always returns false.
> Can you please give me a hint?
> 
> Thanks
> Christian
> 
> 
>
---------------------------------------------------------------------------
> Christian May
> 
> ETH Zurich
> Institute for Theoretical Physics, HIT K 31.5
> CH-8093 Zurich, Switzerland
> 
> Tel: + 41 44 633 79 61
> Fax: + 41 44 633 11 15
> 
> Email: cmay at itp.phys.ethz.ch
>