[Dune] GridPtr: distribution of element and vertex parameters

[Bernd Flemisch]

Dear Dune,

we would like to implement the distribution of a GridPtr's element and 
vertex parameters for UGGrid. The corresponding lines 249ff in 
gridptr.hh are
         DataHandle dh(*this);
         gridPtr_->loadBalance( dh.interface() );
         gridPtr_->communicate( dh.interface(), 
InteriorBorder_All_Interface,ForwardCommunication);
Since the DataHandle below is not documented and since the documentation 
of the loadBalance(DataHandle&) method of the grid is not giving me any 
clue: Could you please explain me in a bit more detail what these three 
lines are supposed to do? In particular, I do not know which part is 
done by the loadBalance and which part by the communicate method. What 
is supposed to happen with the DataHandle parameter inside the 
loadBalance method?

Thank you. Kind regards
Bernd

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Bernd Flemisch                               phone: +49 711 685 69162
IWS, Universität Stuttgart                   fax:   +49 711 685 60430
Pfaffenwaldring 61                  email: bernd at iws.uni-stuttgart.de
D-70569 Stuttgart                  url: www.hydrosys.uni-stuttgart.de
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