PTDF=[
  0.0000000e+000 -6.5714286e-001 -3.5714286e-001
  0.0000000e+000 -3.4285714e-001 -6.4285714e-001
  0.0000000e+000  3.4285714e-001 -3.5714286e-001
];
LODF=[
 -1.0000000e+000  1.0000000e+000 -1.0000000e+000
  1.0000000e+000 -1.0000000e+000  1.0000000e+000
 -1.0000000e+000  1.0000000e+000 -1.0000000e+000
];
