[vtkusers] wx/vtk weirdness

[Bill Lorensen]

I see that itk has similar issues, but only for 2 of its readers. So
what is the proper way to read floats? With streams?

Bill

On Fri, Nov 27, 2009 at 11:50 AM, Mathieu Malaterre
<mathieu.malaterre at gmail.com> wrote:
> Yes.
>
> On Fri, Nov 27, 2009 at 5:49 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>> Mathieu,
>>
>> There are many vtk readers that use sscanf to read floating point
>> numbers. Does that mean that these readers may also misinterpret
>> floating point if LC_NUMERIC is different.
>>
>> Bill
>>
>> On Fri, Nov 27, 2009 at 11:25 AM, Mathieu Malaterre
>> <mathieu.malaterre at gmail.com> wrote:
>>> On Fri, Nov 27, 2009 at 5:17 PM, "Eduardo M. Suárez Santana"
>>> <esuarez at itccanarias.org> wrote:
>>>> Mathieu Malaterre wrote:
>>>>> On Fri, Nov 27, 2009 at 4:47 PM, "Eduardo M. Suárez Santana"
>>>>> <esuarez at itccanarias.org> wrote:
>>>>>
>>>>>> This looks weird to me. Spacing of vtkDICOMImageReader depends on
>>>>>> whether I use wx or not.
>>>>>>
>>>>>> Can anyone reproduce?
>>>>>>
>>>>>> It fails in vtk-5.2.1 and vtk-5.4.2 on linux, python-2.6.2 and wxpython-2.8.10.1
>>>>>>
>>>>>
>>>>> DICOMParser is using internally sscanf to decode the spacing. It will
>>>>> fails to work when LC_NUMERIC is not compatible with "C" style. I
>>>>> believe by default GTK (underlying implementation of wx on linux) sets
>>>>> the LC_NUMERIC corresponding to your locales.
>>>>>
>>>>> HTH
>>>>>
>>>> Rethinking.
>>>>
>>>> Is not a bug if the correct behaviour depends on setting an unrelated
>>>> variable (DICOM - LC_NUMERIC)?
>>>>
>>>
>>> I /personally/ believe it is. This is up to the DICOM implementor to
>>> make sure the reading/writing of floating point value works as per
>>> DICOM specs (ie. use '.' and not ',').
>>> Maybe log a bug for that.
>>>
>>> 2cts
>>> --
>>> Mathieu
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>>
>
>
>
> --
> Mathieu
>