[vtkusers] get selected area's point coordinates

[czbebe]

Dear David,

Dataset is an unstructured grid data (cuboid).

Best regards,

Oka


czbebe wrote:
> 
> Dear David,
> 
> My anxiety is ids will be changed in case of clipping cutting surface.
> Because points on the surface may not the same as original figure's
> (for example cuboid) points. I tried to get ids by rubberband, but 
> their ids are differnet from original ids. So, id is not trusted and 
> I want to get points' coordinates of selected points for which
> original ids will be guessed.
> 
> Best regards,
> 
> Oka
> 
> 
> David Doria-2-3 wrote:
>> 
>> On Tue, Sep 13, 2011 at 7:24 AM, oka <oka at bpe.es.osaka-u.ac.jp>
>> wrote:
>>> Dear Users,
>>>
>>> How can I get point coordinates of rubbberband or click
>>> selected area ? I know node or element label numbers can
>>> be obtained, but how about point coordinates ?
>>> My trial is to get the closest original points to clipping surface
>>> points when clipping was done. Clipping generates new points
>>> which has different coordinates and labels from original ones.
>>> Therefore, I want to estimate the closest original points from
>>> clipped selected surface's point coordinates.
>>>
>>> Best regards,
>>>
>>> Oka
>> 
>> If you use a vtkIdFilter before the selection you can then get the
>> original point ids of the selection, as demonstrated here:
>> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Picking/HighlightSelectedPoints
>> 
>> David
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