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<TITLE>Re: [vtk-developers] Adding IsNan() to vtkMath</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>How portable are these? Do I have to worry about them not existing on, say, MSVC6 or HP?<BR>
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-Ken<BR>
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On 7/21/09 7:28 AM, "Brad King" <<a href="brad.king@kitware.com">brad.king@kitware.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>#include <limits><BR>
...<BR>
std::numeric_limits<double>::quiet_NaN()<BR>
std::numeric_limits<double>::signaling_NaN()<BR>
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A quiet NaN silently propagates through expressions, while a<BR>
signaling NaN will trigger a floating point exception.<BR>
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**** Kenneth Moreland<BR>
*** Sandia National Laboratories<BR>
*********** <BR>
*** *** *** email: <a href="kmorel@sandia.gov">kmorel@sandia.gov</a><BR>
** *** ** phone: (505) 844-8919<BR>
*** web: <a href="http://www.cs.unm.edu/~kmorel">http://www.cs.unm.edu/~kmorel</a><BR>
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