// cube.fe
// Evolver data for cube of prescribed volume, which
// evolves into a sphere.

vertices
1  0.0 0.0 0.0 
2  1.0 0.0 0.0
3  1.0 1.0 0.0
4  0.0 1.0 0.0
5  0.0 0.0 1.0
6  1.0 0.0 1.0
7  1.0 1.0 1.0
8  0.0 1.0 1.0

edges  /* given by endpoints and attribute */
1   1 2   
2   2 3   
3   3 4  
4   4 1 
5   5 6
6   6 7  
7   7 8 
8   8 5
9   1 5   
10  2 6  
11  3 7 
12  4 8

faces  /* given by oriented edge loop */
1   1 10 -5  -9
2   2 11 -6 -10
3   3 12 -7 -11
4   4  9 -8 -12
5   5  6  7   8
6  -4 -3 -2  -1

bodies  /* one body, defined by its oriented faces */
1   1 2 3 4 5 6  volume 1

read

// a typical evolution
gogo := { g 5; r; g 12; r; g22;
          hessian_normal; hessian_seek; // scale very near 1, good.
          hessian;   // converged (at least in normal direction)
        }