If all of the grids that are used in the vtkMultiBlockDataSet derive from vtkPointSet, you can use the same vtkPoints for each of the grids. They should also have the same vtkPointData as a result so that data is not duplicated. <br>
<br>Andy<br><br><div class="gmail_quote">On Fri, Feb 20, 2009 at 2:23 PM, Jacques Papper <span dir="ltr"><<a href="mailto:jpapper@ara.co.uk">jpapper@ara.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi all,<br>
<br>
I'm writing a reader for a dataset which has boundary faces (tri and quads)<br>
as well as volume cells (tets etc..).<br>
In would like to use a CompositeDataSet as a container, so that I can easily<br>
extract boundary faces which are groupesd in named zones (for ex: upper_surf<br>
lower_surf etc...).<br>
<br>
The problem I encounter is that if I us a vtkMultiblockDataSet composed of<br>
vtkUnstructuredGrid there is no relationship between the separate blocks.<br>
This means that I need to duplicate points which are shared between the<br>
different blocks, duplicate the data associated to thes points etc ...<br>
<br>
Is there a vtkCompositeDataSet where all the points and data are shared<br>
between the branches and the only difference is the cells ?<br>
<br>
Thank you for your guidance.<br>
<br>
Jacques PAPPER<br>
Applied CFD Team Leader<br>
Tel: +44 (0) 1234 324677<br>
<br>
<br>
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