[Insight-developers] Great examples

[Miller, James V (Research)]

Maybe there could be a section in the Software Guide
on "Using ITK procedurally", where we could contrast using
the pipeline to procedural programming.  Not quite sure where to 
put this. I looked through the guide today and really
didn't see a good place to put in such a section. Perhaps
in the Developers section.





-----Original Message-----
From: Luis Ibanez [mailto:luis . ibanez at kitware . com]
Sent: Thursday, December 18, 2003 2:42 PM
To: hans-johnson at uiowa . edu; insight-developers at itk . org
Subject: Re: [Insight-developers] Great examples



Hans,

Thanks for pointing out the importance of showing
users how to transition from other programming
paradigms.

We have been immersed in this so long now that we
take for granted a number of practices and intuitions
on how to do things.

The FAQ could be a good place to put such descriptions
but it seems that in practice very few people explore
the FAQ (unfortunately).

I would think in adding a section to the software guide
with a title like "Transition to ITK" or something along
those lines. This section could have something like a
collection of "common mistakes" that people make when
starting with ITK.

Eg.  trying to use the image of filter->GetOutput() without
      having called Update();

or just what Radhika did: disconecting filter
for pluging them farther in the pipeline.

or running CMake in a subdirectory of the source
tree.



We could collect such cases from the users-list archives.

There are a number of topics scheduled to be added to
the SoftwareGuide for a future second edition. That may
still be six months to one year away from now...



   Luis


-------------------------
Hans J. Johnson wrote:
> Luis & Jim,
> 
> The exchange of e-mails between you, and Radhika, does a great job of
> explaining one of the major stumbling blocks in getting new people to
> use ITK.  I've run into this myself in helping others to incorporate a
> small peice of ITK with existing applications, without a complete
> understanding the ITK pipeline.
> 
> In particular, when refactoring legacy code to ITK, it is critical that
> one can use the ITK functionality in a proceedural manner as a stepping
> stone to moving it to a pipeline structure.  I've seen a couple of
> programmers (including myself) spend many days trying to figure out how
> to get one aspect of ITK (i.e. a single filter) to work in old
> procedural code because we made the same mistake that Radhika did.
> 
> Would you please collect these examples and put them into the FAQ?  Even
> better, an example that is included in the pipeline section of the ITK
> software guide would clear up a lot of questions.
> 
> Just my 2 cents, but this is the best explanation that I've seen so
> far.  It could just be that after wrestling with this for so long that
> this example was the one that made it all click.
> 
> Thanks,
> Hans J. Johnson
> 
> 
> _______________________________________________
> Insight-developers mailing list
> Insight-developers at itk . org
> http://www . itk . org/mailman/listinfo/insight-developers
> 



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