[vtkusers] Support of Positive & Negative Indefinite NAN in VTK?

[rakesh patil]

Hello,

I would like to know whether VTK supports +/- Indefinite NAN? Kindly note
that NaN is different from Indefinite Nan as explained here
<http://blogs.msdn.com/b/oldnewthing/archive/2013/02/21/10395734.aspx>. I
have seen IsNan() in vtkMath class. Does it cover Indefinite NaN also?

Thanks

Regards
Rakesh Patil
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