Examples of errors detected by the V3076 diagnostic

V3076. Comparison with 'double.NaN' is meaningless. Use 'double.IsNaN()' method instead.

Old NASA World Wind (C#)

V3076 Comparison of 'icon.OnClickZoomAltitude' with 'double.NaN' is meaningless. Use 'double.IsNaN()' method instead. Icon.cs 389

public override bool PerformSelectionAction(DrawArgs drawArgs)
{
  ....
  if(icon.OnClickZoomAltitude != double.NaN ||
     icon.OnClickZoomHeading  != double.NaN ||
     icon.OnClickZoomTilt     != double.NaN)
  {
    ....
  }
  ....
}

Similar errors can be found in some other places:

• V3076 Comparison of 'icon.OnClickZoomHeading' with 'double.NaN' is meaningless. Use 'double.IsNaN()' method instead. Icon.cs 389
• V3076 Comparison of 'icon.OnClickZoomTilt' with 'double.NaN' is meaningless. Use 'double.IsNaN()' method instead. Icon.cs 389
• V3076 Comparison of 'm_ShapeTileArgs.ScaleMin' with 'double.NaN' is meaningless. Use 'double.IsNaN()' method instead. ShapeFileLayer.cs 642
• And 15 additional diagnostic messages.

Unity C# reference source code

V3076 Comparison of 'f' with 'float.NaN' is meaningless. Use 'float.IsNaN()' method instead. PhysicsDebugWindowQueries.cs 87

protected static bool IsFinite(float f)
{
  if (   f == Mathf.Infinity
      || f == Mathf.NegativeInfinity
      || f == float.NaN)
  {
    return false;
  }

  return true;
}