CGAL users discussion list

[Gaetan <>]

Hi all,

I want to perform a Poisson reconstruction of an oriented point cloud that
represents several disjoint smooth closed surfaces.
Furthermore, I assume that the surfaces are not mutually included.
To recover several disjoint surfaces I need to add at least one point per
connected component to the c2t3 object (see  this post
<http://cgal-discuss.949826.n4.nabble.com/About-the-surface-mesh-generator-tt952799.html#a952801>
 
).
However, I do not know the number of connected components nor do I know
where they are located.
Inserting all the points in the c2t3 allows to recover all the components
but this leads to an oversampled and un-smooth surface mesh.

So far, I have thought of a workaround where I would mesh the opposite of
the Poisson implicit function within the bounding sphere of the point cloud.
This means that instead of meshing a set of disjoint smooth closed surfaces
I would mesh a sphere with disjoint holes.
The final step would be to extract the holes as a set of disjoint smooth
closed surfaces.

Nonetheless, I am wondering if there is not a better way to do this.
For example, could we detect the connected components when computing the
Poisson implicit function, and ultimately extract one point per connected
component?


Thanks for your help,
Gaetan



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