[vtkusers] mesh subdivision and uniform point distribution

[ruifigueiredo at isr.ist.utl.pt]

Thanks David for your quick reply,

I gave a look what the stratified sampling algorithm you've mentioned,  
but I still have some questions:
As I understood, the "Level" option controls the density of the  
points, but how is this done? Is it possible to specify the sampling  
step? Does this method works for upsampling or only for downsampling?

I've implemented an upsampling idea I found somewhere on the internet that
upsamples the number of points inside a polygon, with a guarantee  
that, along the interpolated directions, the distance between  
interpolated locations is not greater than a threshold. Keeping the  
mesh connectivity should be easy, since the upsampling is made  
individualy for each polygon on the mesh then, one should know the  
direction of the triangulations.

Rui


Quoting David Doria <daviddoria at gmail.com>:

> 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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