*.tri

• .tri file is mesh definition file. For the finite element method, the mesh structure is constructed by triangular mesh. Usually there is only 1 tri file for different bias. The format is

Node1 node2 node3    ->element 1
Nodexx1 nodexx2 nodexx3    ->element 2
...
...
...
...
Nodexx1 nodexx2 nodexx3    ->element N

For example: If we have total 32 elelments and 25 nodes as shown in figures

1 6 7 
1 7 2 
2 7 8
2 8 3 
3 8 9 
3 9 4
4 9 10
4 40 5
...
...
...
18 23 24 
18 24 19 
19 24 25
19 25 20