[vtkusers] How to bring an object to the coordinate's origin

[David Doria]

Nuno,

There are many many variants of the basic ICP algorithm. VTK has only the
very basic one implemented. The first big addition is the use of an
M-estimator instead of a Euclidean distance function. An easier way to
accomplish that is a "don't include points that are too far away" threshold
which would allow it to work on the data sets you describe. The method Wes
suggested about clipping one point set with the other after they are
initially reasonably aligned sounds like a reasonable plan. Luca Antiga and
I had worked on some of these improvements long ago (
http://public.kitware.com/Bug/view.php?id=8983), but they were not well
received (not objected to, just not accepted). Maybe we should try again
with the new Gerrit workflow.

David
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