[vtkusers] determine points on the surface of a polydata

[Chiranjib Sur]

Hi All,
I am wondering if there is any method to determine whether a given point is
on the surface of a polydata?

The following example :
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointInsideObject
shows how to determine whether a point is inside or outside of a polydata
surface.

What I am looking for is a method to determine if the point in just on the
surface?

Any help?

Thanks much for your time and suggestions.

Chiranjib
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