# A Simple Mesh

The index table is made regular by tessellating all polygons with triangles.

$j$$i_0$$i_1$$i_2$
0 0 1 4
1 4 1 3
2 3 1 2
3 0 5 1
4 1 5 6
5 1 6 2
6 2 6 7
7 2 7 3
8 3 7 8
9 3 8 4
10 4 8 9
11 4 9 0
12 0 9 5
13 5 9 6
14 6 9 7
15 7 9 8