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CGAL::Surface_mesh - Accessing face/vertex using an integer index?

From the user manual of the CGAL Surface_mesh class:

the data structure uses integer indices as descriptors for vertices, halfedges, edges and faces

I am interested in accessing a certain face/edge/vertex based on it's integer index, but cannot find how this is done. Iterators obviously work, but I don't want to iterate a known number of times just to get to the relevant face_index/vertex_index if I can access based on an integer face/vertex index known a-priori.

Can someone please explain how (if actually possible) to use the integer indexing if I want to access the i-th face "directly" (without iterating)?

Solution

  • The following should work: unsigned int i = 33; Surface_mesh::Face_index fi(i);