[vtkusers] question on vtkImageData orientation support

[Xiaofeng Z]

> On Thu, Nov 4, 2010 at 10:18 PM, Xiaofeng Z <xf10036 at hotmail.com> wrote:
>> It seems that I can use negative values in pixel spacings to have the
>> image
>> correctly displayed.  Is this a (undocumented) feature, or could it be a
>> time bomb that's ticking.
>>
>
> When I tried to use that hack 2 years ago I was told not to do that
> because this was an undocumented feature that could go away at any
> time.
>
> John
>

I think this is a good feature. Maybe this should be turned into a 
documented feature, agree?