[vtk-developers] isnan

[Thompson, David C]

>>> In the mean time, how about the question of where to put
>>> the actual isnan function in VTK, hopefully in a way that
>>> introduces as little overhead as possible? Is vtkstd::isnan()
>>> the right place (since that's analogous to std::isnan() )? 
>> Note that vtkMath already has static member functions
>> Inf(), NegInf(), and Nan() that return constants. 
>
> Honestly, I missed those because I was looking for the test.
> However, I think you really need the isnan() test too.

I was not trying to suggest otherwise; I just wanted to
keep the API consistent.

> ...
> I believe ITK supports isnan(), but I didn't really
> follow the discussing thread about it except to get
> it running on the Mac.  Is there a difference in ITK
> and VTK supported compilers?

I don't know. I'll ask around next week and see if I
can find someone who knows exactly what the portability
issue was.

    David
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