mat6 -- Force directed placement matrix.
8 real
1 1 4.000000e+00
1 4 -1.000000e+00
1 6 -5.000000e-01
1 7 -5.000000e-01
1 8 -5.000000e-01
2 2 4.000000e+00
2 3 -5.000000e-01
2 7 -1.000000e+00
2 8 -1.000000e+00
3 2 -5.000000e-01
3 3 3.000000e+00
3 8 -1.000000e+00
4 1 -1.000000e+00
4 4 3.000000e+00
4 5 -1.000000e+00
5 4 -1.000000e+00
5 5 3.000000e+00
5 6 -5.000000e-01
6 1 -5.000000e-01
6 5 -5.000000e-01
6 6 4.500000e+00
6 7 -1.000000e+00
6 8 -1.500000e+00
7 1 -5.000000e-01
7 2 -1.000000e+00
7 6 -1.000000e+00
7 7 6.000000e+00
7 8 -1.500000e+00
8 1 -5.000000e-01
8 2 -1.000000e+00
8 3 -1.000000e+00
8 6 -1.500000e+00
8 7 -1.500000e+00
8 8 6.000000e+00
0 0 0.0
3.165000e+02
3.970000e+02
3.640000e+02
3.000000e+02
6.490000e+02
4.335000e+02
3.905000e+02
-1.355000e+02