[Dune] ISI final suggestion:

[Mario Ohlberger]

Dear Christian and Peter,

  after a further discussion of the IntersectionIterator issue in our
local DUNE-meeting, we decided to propose the following solution for
DUNE 1.0:

There should be all three intersectionIterators, i.e.
IntersectionIterator, LevelIntersectionIterator,
LeafIntersectionIterator, all satisfying the same interface.
Thus the Entity interface provides the methods ibegin, iend,
leafbegin, leafend, and levelbegin, levelend.
ibegin and iend do the same as before and are not deprecated!


This should do for 1.0! Everthing will work, and further discussion
should be post-1.0.

What do you think.

Best regards,

Mario.


Christian Engwer wrote:
> Hello,
> 
> 
>>I want to suggest, to change the interface
>>as given below. It seems to me that we can manage
>>this for 1.0, so I will change the interface
>>at the beginning of next week if I don't get any
>>negative feedback.
> 
> 
> I'm really against this change. I feel like we need to discuss this
> issue in more detail. We all know that the intersection iterator is
> currently not the perfect solution, but there are more things than
> just the leaf/level problem that should be cleared. To me it seems
> like we will replace one medium quality solution with a medium+epsilon
> quality solution. I would prefer to get 1.0 out asap and discuss the
> big solution afterwards. We have still enough of other issues that
> need to be solved before 1.0, so please... no new constructions sites.
> 
> Cheers Christian
> 
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-- 
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  Dr. Mario Ohlberger		     Tel.: +49-761/203-5635
  Abteilung f. Angewandte Mathematik Fax.: +49-761/203-5632	
  Universitaet Freiburg
  Hermann-Herder-Str. 10
  D-79104 Freiburg

  E-Mail: mario at mathematik.uni-freiburg.de
  http://www.mathematik.uni-freiburg.de/IAM/homepages/mario/
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