I have used CGAL to construct the alpha-shapes around a set of particles representing a droplet. Therefore, I have a list of surface nodes and elements forming the triangular surface. When I visualize this information, in some cases the alpha-shapes may include more than one closed manifold (e.g. when the droplet is splashed). I was wondering to know how I can count the number of closed manifolds (not manually). Also, is there any way to get more information about the nodes and elements that construct each specific closed manifold?
Thanks