[vtkusers] lack of info on vtkobject....

[pratik]

Hi Everyone,
After a bit more inspection, i think that the idx *probably* acts as a 
"proxy" for a "connection-on-a-port" specified when using 
SetInputArrayToProcess(i.e instead of using a port and a connection 
number, one just uses idx as a  "proxy" number). I got this idea by the 
way GetinputArraytoProcess is used(where only the idx integer can be 
used to fetch the required DataArray).

  It would be really helpful if someone can confirm/deny this guess.

Thanks in advance,
Pratik

On Saturday 18 June 2011 06:42 AM, pratik wrote:
> Hi everyone,
> Can anyone please tell me what the SetInputArraytoProcess method does? 
> In particular, I was confused about the 'idx' value that it 
> uses...what does that stand for? I believed that the input/output 
> interface to vtkobjects consisted of:
> 1) ports and
> 2) connections
> so what is this "idx array" referring to exactly?
>
>  The man page left me quite confused:
>  // Set the input data arrays that this algorithm will
>   // process. Specifically the idx array that this algorithm will process
> (what is idx array?)
>   // (starting from 0) is the array on port, connection with the 
> specified
>   // association and name or attribute type (such as SCALARS).
> (what do these last two sentences mean? In particular what does  
> "array on port" mean? Is it the "connections"? )
>    // The
>   // fieldAssociation refers to which field in the data object the 
> array is
>   // stored. See vtkDataObject::FieldAssociations for detail.
>
>
> Also, just out of curiosity, if there is no documentation for these 
> methods , then how are developers using them?
>
> Thanks in advance,
> Pratik