[Paraview] vtkCompositeDataSet - memory ?

[Moreland, Kenneth]

You can share the points by simply creating one vtkPoints object and then passing those points to all the unstructured grids in your data object.  Then all the blocks will be sharing that data.

Note, however, that ParaView will not actually check that.  Thus it will probably incorrectly count the number of points and the amount of memory the points take up multiple times, one for each block.  Also, if you pass the data through a filter that changes the points, those downstream filters will replicate their point data.

-Ken


On 2/20/09 12:23 PM, "Jacques Papper" <jpapper at ara.co.uk> wrote:

Hi all,

I'm writing a reader for a dataset which has boundary faces (tri and quads)
as well as volume cells (tets etc..).
In would like to use a CompositeDataSet as a container, so that I can easily
extract boundary faces which are groupesd in named zones (for ex: upper_surf
lower_surf etc...).

The problem I encounter is that if I us a vtkMultiblockDataSet composed of
vtkUnstructuredGrid there is no relationship between the separate blocks.
This means that I need to duplicate points which are shared between the
different blocks, duplicate the data associated to thes points etc ...

Is there a vtkCompositeDataSet where all the points and data are shared
between the branches and the only difference is the cells ?

Thank you for your guidance.

Jacques PAPPER
Applied CFD Team Leader
Tel: +44 (0) 1234 324677


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   ****      Kenneth Moreland
    ***      Sandia National Laboratories
***********
*** *** ***  email: kmorel at sandia.gov
**  ***  **  phone: (505) 844-8919
    ***      web:   http://www.cs.unm.edu/~kmorel

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