[vtkusers] Difference between AddArray, SetScalars, SetVectors

[Dominik Szczerba]

Suppose you have several arrays in one dataset. Clearly you want to say 
at times which one to use for processing (e.g. smoothing image data). 
But as I said, the whole thing bears every sign of desperate backward 
compatibility preserving efforts so you will have to be forgiving.

David Doria wrote:
> On Thu, Oct 22, 2009 at 3:53 PM, Dominik Szczerba <dominik at itis.ethz.ch> wrote:
>> 'Set' sets the current one, 'add' adds to the list you can chose from later.
>> The concept of scalars, vectors and field data (arbitrary arrays) is not
>> fully clear to me, but I usually go for the arrays.
>>
> 
> Now that you said "current", I looked and saw the SetActive* functions
> that I had never seen/used before. Interesting - what is the idea of
> having multiple data sets that you can set one at a time to "active"?
> 
> Can anyone clarify for Dominik and I vectors vs scalars vs arrays?
> 
> Thanks,
> 
> David
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