[Insight-developers] CVS access problem

[John M. Galeotti]

That would require CVS write access which I don't have, and I can't 
access http://www.itk.org/insight/HTMLPrivate/cvspasswd.c without a 
pre-existing name and password, which I need cvspasswd to generate.  
What should I do?

John
jgaleotti@cmu.edu

On Wednesday, April 16, 2003, at 09:07 AM, Miller, James V (Research) 
wrote:

> I would derive from ConditionalConstIterator then.  Sounds to me like 
> you
> can move the method IsPixelIncluded down to the subclass.  Why don't 
> you do
> that and run the tests and make sure they still pass. If they do, 
> check it
> in.
>
> Jim
>
>> -----Original Message-----
>> From: John M. Galeotti [mailto:jgaleotti@cmu.edu]
>> Sent: Wednesday, April 16, 2003 4:20 AM
>> To: Luis Ibanez
>> Cc: insight-developers@public.kitware.com
>> Subject: Re: [Insight-developers] ConditionalConstIterator Error?
>>
>>
>> If I derive from ImageConstIterator, then I am forced to have a
>> SetIndex method, which is ill-defined since multiple locations on a
>> path can map to the same image index, and many image indices will not
>> map to any point on a path.
>>
>> So, should I try to descend from ImageConstIterator,
>> ConditionalConstIterator, or nothing at all?
>>
>> John
>>
>> On Tuesday, April 15, 2003, at 10:08 PM, Luis Ibanez wrote:
>>
>>>
>>> Hi John,
>>>
>>>
>>> It is not a problem that the path does not cover all
>>> the image. In fact, most iterator don't cove the full
>>> image since they are conditioned to walk over a region.
>>>
>>> You can safely derive your new iterator from the
>>> ImageConstIterator (or the ImageConstIteratorWithIndex).
>>>
>>> There is no advantage in deriving from the
>>> ConditionalConstIterator. As a matter of fact you just
>>> encountered that the conditional iterator has additional
>>> functionality that is not needed in your path iterator.
>>>
>>>
>>> Please note also that Josh recently added a chapter on
>>> iterators to the SoftwareGuide.pdf.
>>>
>>> Hope that helps
>>>
>>>
>>>    Luis
>>>
>>>
>>> --------------------------------------
>>> John M. Galeotti wrote:
>>>> Hello, I am working on an iterator to walk through an
>> image following
>>>> any type of path.  Since most paths will not cover all
>> image indices,
>>>> it would be logical for this iterator to descend from
>>>> ConditionalConstIterator, but there is one small problem.
>>>> ConditionalConstIterator includes the pure virtual function
>>>> IsPixelIncluded(), which would be almost useless and prohibitively
>>>> expensive to calculate for some types of paths (paths are almost
>>>> always traveled linearly), and so I really do not want to
>> implement
>>>> the exhaustive search required for it.  The documentation in
>>>> ConditionalConstIterator states that this function is used to
>>>> "Compute whether the index of interest should be included in the
>>>> flood."  Therefore, it seems that this pure virtual
>> function should
>>>> be introduced into the ITK class hierarchy in its child
>>>> FloodFilledFunctionConditionalConstIterator, not in
>>>> ConditionalConstIterator.  A quick look at the
>>>> ConditionalConstIterator inheritance diagram seems to
>> indicate that
>>>> this would not be a problem, and
>>>> FloodFilledFunctionConditionalConstIterator.h would not
>> even have to
>>>> be modified.
>>>> Could someone please remove the IsPixelIncluded() function from
>>>> ConditionalConstIterator.h?
>>>> Thank you,
>>>> John Galeotti
>>>> jgaleotti@cmu.edu
>>>> _______________________________________________
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>>>> Insight-developers@public.kitware.com
>>>> http://public.kitware.com/mailman/listinfo/insight-developers
>>>
>>>
>>>
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