[vtkusers] mesh subdivision and uniform point distribution

[David Doria]

Wenlong, ICP is for registration, not sampling.

Rui, I you might look at something like Stratified Sampling:
https://github.com/daviddoria/StratifiedSampling

or a built-in VTK option is the vtkCleanPolyDataFilter:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/DownsamplePointCloud

However, neither of these preserve mesh connectivity (i.e. they are just
point cloud operations) so you'd have to do some remeshing after the fact.

Good luck,

David
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