[vtkusers] Distance between PolyData and a point along a direction

[emreturkoz]

I have a point, and a point normal defined to it. Suppose I also have a
polydata, which doesn't include or span this point.

I want to find the distance from this point to the polydata along the
polydata normal. By distance, I mean how far should I translate the point so
that it "touches" the surface defined by polydata.

Is this possible to do with vtk?? 

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