[vtkusers] Getting the original cell id's from vtkExtractUnstructuredGrid

[Bryn Lloyd]

Hi Sarah,


A simple method is to use the vtkIdFilter before you extract a
region/surface/whatever.

http://www.vtk.org/doc/nightly/html/classvtkIdFilter.html


Cheers, Bryn








Sarah Macumber wrote:
> Hi all,
>  
> Is there anyway to get the original cell & point ID's from vtkExtractUnstructuredGrid which returns a new vtkUnstructuredGrid?  For example if you extract the cells using extents in the middle of your dataset how can you find out what those cell & point ID's are?  They get re-ordered in the new grid.  I am not doing extraction via graphical selection so I need to use global cordinates to do my extraction & then get back an ID list of the cells.
>  
> Any help is appreciated, Sarah
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-- 
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Bryn Lloyd
Computer Vision Laboratory
ETH Zürich, Sternwartstrasse 7
CH - 8092 Zürich, Switzerland
Tel: +41 44 63 27690
Fax: +41 44 63 21199
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