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List:       vtkusers
Subject:    [vtkusers] Bugs (?) in Parallel/vtk*putPort.cxx
From:       Mark Asbach <mark.asbach () post ! rwth-aachen ! de>
Date:       2003-03-31 21:08:20
Message-ID: E6D9F36E-63BC-11D7-917C-000393449862 () post ! rwth-aachen ! de
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Hi list,

there're some code lines that I possibly don't understand or that might 
be a (unimportant) bug. Could someone here point out, why 
vtkOutputPort::TriggerUpdateInformation(int remoteProcessId) contains

>   int wholeInformation[8];
>   input->GetWholeExtent( wholeInformation );
>
>   this->Controller->Send( wholeInformation, 7,
>                           remoteProcessId, 
> vtkInputPort::INFORMATION_TRANSFER_TAG);

while vtkInputPort::UpdateInformation(), the corresponding part, 
contains

>   int wholeInformation[7];
>   this->Controller->Receive( wholeInformation, 7,
>                              this->RemoteProcessId,
>                              vtkInputPort::INFORMATION_TRANSFER_TAG);

[…]

>   output->SetWholeExtent( wholeInformation );

and both are working on vtkDataObjects' attribute defines as

>   // Description:
>   // Set/Get the whole extent of this data object.
>   // The whole extent is meta data for structured data sets.
>   // It gets set by the source during the update information call.
>   vtkSetVector6Macro( WholeExtent, int );
>   vtkGetVector6Macro( WholeExtent, int );

An array of 6 ints would therefore be sufficient, right? Or is there a 
reason, why it transfers 7 ints (and reserves 8 in the first snippet)?

Curious, Mark



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