[Insight-developers] NumericTraits for FixedArray does not define Zero

[Dan Mueller]

Hi Brad,

Thanks for the tip. I will use CVS version.

Cheers, Dan

On 21 February 2010 16:37, Bradley Lowekamp <blowekamp at mail.nih.gov> wrote:
> Hello Dan,
>
> Are you using the latest CVS? ( ahh I see you are using 3.16... )
>
> I believe that this may be been addressed in the past couple of months with a macro for many of the array like types.
>
> http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/Common/itkNumericTraitsFixedArrayPixel.h?revision=1.8&root=Insight&view=markup
>
> Brad
>
> On Feb 21, 2010, at 3:52 AM, Dan Mueller wrote:
>
>> Hi Insight Developers,
>>
>> I notice NumericTraits for FixedArray does not define Zero. eg.
>>    typedef itk::FixedArray<unsigned char, 3> PixelType;
>>    PixelType zero = itk::NumericTraits<PixelType>::Zero;
>> returns
>>    error C2039: 'Zero' : is not a member of
>> 'itk::NumericTraits<itk::FixedArray<TValueType,VLength>>'
>> (VIsual Studio 8.0, ITK 3.16, Windows Vista 32-bit).
>>
>> Is there a good reason for this?
>>
>> Couldn't it be defined similar to VariableLengthVector? ie.
>> (though without needing to pass in self for the size)
>>
>>  static const Self Zero( const Self  & a ) \
>>  {  \
>>    Self b(a.Size());  \
>>    b.Fill( NumericTraits< T >::Zero ); \
>>    return b; \
>>  } \
>>
>> Thanks for any advice.
>>
>> Regards, Dan
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>