[Paraview] How to determine that some points are inside some closed surfaces or not ?

[hengxing pan]

Hi,all

I wrote the lines.vtk in binary format and the points.vtk in ASCII format
according to www.vtk.org/VTK/img/file-formats.pdf.
The attached pictures show the process how I get the tubes(closed surfaces
which I thought the tubes are) ,then I want to find out the points which
are inside the tubes (blue area in the view3), but I don't know how to work
it out.
Now I'm desperate for achieving my aim, so please help me if you know how
to do it !
Thank you in advance !
pan hengxing
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