#vertex 
8
-1 -1 -1 
1 -1 -1 
1 1 -1 
-1 1 -1 
-1 -1 1 
1 -1 1 
1 1 1 
-1 1 1 
#element_face
6
0 1 2 3 
5 4 7 6 
6 2 1 5 
3 7 4 0 
7 3 2 6 
5 1 0 4