[vtk-developers] Adding IsNan() to vtkMath

[Moreland, Kenneth]

How portable are these?  Do I have to worry about them not existing on, say, MSVC6 or HP?

-Ken


On 7/21/09 7:28 AM, "Brad King" <brad.king at kitware.com> wrote:

#include <limits>
...
std::numeric_limits<double>::quiet_NaN()
std::numeric_limits<double>::signaling_NaN()

A quiet NaN silently propagates through expressions, while a
signaling NaN will trigger a floating point exception.


   ****      Kenneth Moreland
    ***      Sandia National Laboratories
***********
*** *** ***  email: kmorel at sandia.gov
**  ***  **  phone: (505) 844-8919
    ***      web:   http://www.cs.unm.edu/~kmorel

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