[vtkusers] Writing MultiBlock datasets

[Utkarsh Ayachit]

You don't have to "get the output" from a vtkMultiBlockDataSet. 
vtkMultiBlockDataSet is itself the dataobject that can be set as the 
input to a filter/writer.

To reiterate Amy, try:

vtkMultiBlockDataSet* mb = vtkMultiBlockDataSet::New();
...
vtkXMLCompositeDataWriter* mbw = vtkXMLCompositeDataWriter::New();
mbw->SetInput(mb); // directly set "mb" as the input no need to do 		
		   // somethign like mb->GetOutput().

Utkarsh

Renato N. Elias wrote:
> 
> yes, in fact, it was my first try. The problem is that I don't know how 
> to get the output from vtkMultiBlockDataSet. How should 
> classvtkXMLCompositeDataWriter and vtkMultiBlockDataSet be connected?
> 
> Renato.
>>
>>
>> Have you tried calling mbw->SetInput(mb)?
>>
>> - Amy
>>
>> Renato N. Elias wrote:
>>> Hi folks,
>>>
>>> does anybody could give me a hand in writing a vtkMultiBlockDataSet. 
>>> I saw there's a  vtkXMLCompositeDataWriter 
>>> <http://www.vtk.org/doc/nightly/html/classvtkXMLCompositeDataWriter.html#f2b96e41718dcb0bc93db39ad82675ad> 
>>> and a derived vtkXMLMultiBlockDataWriter 
>>> <http://www.vtk.org/doc/nightly/html/classvtkXMLMultiBlockDataWriter.html> 
>>> the problem is that I can't do something like:
>>>
>>> // creating a multiblock object
>>> vtkMultiBlockDataSet* mb= vtkMultiBlockDataSet::New();
>>>
>>> // Assign some stuffs
>>> mb->SetBlock(0, ???)
>>> mb->SetBlock(1, ???)
>>> mb->SetBlock(2, ???)
>>>
>>> // Create the writer
>>> vtkXMLCompositeDataWriter* mbw = vtkXMLCompositeDataWriter::New();
>>>
>>> // Set the filename
>>> mbw->SetFileName("test.vtm");
>>>
>>> // Setting up the connection <--- HERE'S MY DOUBT
>>> mbw->SetInputConnection(mb->GetOutput());
>>>
>>> // Write the data
>>> mbw->Write();
>>>
>>> since vtkMultiBlockDataSet does not have a "GetOutput" method.
>>>
>>> Does anyone could supply an example?
>>>
>>> Thanks
>>>
>>> Renato.
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>>>
>>
> 
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