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Hello,

I just begun to use CGAL and so my question is quite basic, sorry.
I have compile an example to create a triangulation and print it. The output
file looks like the example below.
It there somewhere in the documentation a description of this data structure?
The first lines are obviously dimension, #nodes , coordinates but then
elements. But why do I get so many elements? why node5 appears?
Could you please explain me this format? Thank you.

3
5
0 0 0
0 1 0
1 0 0
0 0 1
1 1 1
8
1 0 3 4
2 1 3 4
1 2 0 4
2 3 1 0
0 2 3 5
5 2 3 4
0 5 3 4
0 2 5 4
6 1 2 3
0 5 2 3
7 0 1 3
0 2 4 1
5 6 7 3
1 6 7 4
5 0 7 4
5 6 2 4