That does sound like a good idea. How about calling it INVERSE, and adding that as a property to vtkSelection. Then make the vtkExtractSelected* filters respect it. Probably the best place to do that is where each filters inspects individual points and cells.
<br><br>I'm too busy to try it in the short term but would be glad to help.<br><br>cheers<br>Dave DeMarle<br><br><div><span class="gmail_quote">On 3/21/07, <b class="gmail_sendername">John Norris</b> <<a href="mailto:jnorris@mcs.anl.gov">
jnorris@mcs.anl.gov</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br><br>I've got a feature request regarding vtkSelection and the vtkExtract*
<br>filters that use it. It would be really helpful if there was some sort<br>of "ReverseSense" or "EverythingElseExcept" option, either as flags in<br>the algorithms or as an information field in vtkSelection. Basically I
<br>want to turn the selection list into an exclusion list.<br><br>I can make these changes myself; they're fairly straight-forward. I'd<br>be willing to contribute them if it something that Ken Martin, Will<br>Schroeder, and Bill Lorensen deem valuable enough.
<br><br>John<br>--<br>John Norris<br>Research Programmer<br>Center for Simulation of Advanced Rockets<br><a href="http://www.uiuc.edu/ph/www/jnorris">http://www.uiuc.edu/ph/www/jnorris</a><br>_______________________________________________
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