[vtkusers] Simple queries

[Oliver Diessel]

Hi Everybody,
                     I am quite new in VTK.I have some queries.I have got a point on the surface of an object.I want to know the cell id which contains the point and I also want to know the normal of the cell ( Is there any difference between point normal and cell normal?) 
  Thanks everyone in advance.
   
  Oliver.

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