[vtkusers] how to render vtkMultiBlockDataSet?

[Nelson]

Dear David,

I put the *every file in a specified directory* pertaining to the d3plot.
Then It shows the no.of blocks are 7. and paraview does not crashes.

After deep observation, I found that every block is type of un-structured
grid.
Now how to render it using vtk?

Best Regards,
Nelson Joseph.G


On Wed, Jan 5, 2011 at 7:55 PM, David Doria-2-3 [via VTK] <
ml-node+3328885-787842135-146931 at n5.nabble.com<ml-node%2B3328885-787842135-146931 at n5.nabble.com>
> wrote:

> On Wed, Jan 5, 2011 at 9:14 AM, Nelson <[hidden email]<http://user/SendEmail.jtp?type=node&node=3328885&i=0>>
> wrote:
> >
> > Hi David,
> >
> > I think it may be of type "vtkMultiBlockDataSet"
>
> Right, that is the type of reader->GetOutput(), but as far as I know
> you need to get and render each block separately.
>
> We need to know the type of each block so we can get them with:
> vtkUnstructuredGrid* ug =
> vtkUnstructuredGrid::SafeDownCast(reader->GetOutput()->GetBlock(0));
>
> Unfortunately, your file seems to have 0 blocks:
> std::cout << "Number of blocks: " <<
> reader->GetOutput()->GetNumberOfBlocks() << std::endl;
>
> which may also be why ParaView crashes.
>
> David
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