On Wed, Jan 20, 2010 at 9:58 AM, David E DeMarle <[email protected]>wrote:
> It was not meant to be preserved. For performance reasons the > extraction filter (vtkExtractSelectedIds specifically) sorts both the > selection list and the element id array so that it can do a quick > lookup of the usually numerous entries in the selection list. > > David E DeMarle > Kitware, Inc. > R&D Engineer > 28 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-371-3971 x109 > > > > On Tue, Jan 19, 2010 at 1:37 PM, David Doria <[email protected]> wrote: > > On Mon, Jan 18, 2010 at 12:31 PM, David Doria <[email protected]> > wrote: > >> > >> If I select 3 points and then use the ExtractSelection filter, I would > >> expect the IDs of the points to be 0,1,2, in the order selected. > >> Instead, they are 2, 0, 1. > >> > >> Is there any way to prevent this? I am trying to set corresponding > >> landmarks, so the order is important, and it is being lost. > >> > >> Thanks, > >> > >> David > > > > Here is a demo of the problem: > > > > http://www.rpi.edu/~doriad/Paraview_List/ExtractSelection/ > > > > points.vtp contains 10 points, (0-9). I selected points 9, 8, 7, in that > > order and extracted the selection. The result (extracted.vtp) has the 3 > > extracted points (corresponding to 9,8,7) ordered 2, 1, 0, rather than 0, > 1, > > 2, which was the selection order. > > > > Is this a bug or was the ordered never intended to be preserved? > > > > Thanks, > > > > David > > > > I see. Is there any other way in Paraview I can get a list of points in the order I click/select them? Thanks, David
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