I_xx and I_yy = 0, sometimes -0 -> Rad = nan (should I_xx = abs(...) ?)
also Det = division by 0, should return 0 if ixx + iyy = 0.
(MAYBE: fix inertia calc: integrate dm over each segment rather than dm.pt[i])
I_xx and I_yy = 0, sometimes -0 -> Rad = nan (should I_xx = abs(...) ?)
also Det = division by 0, should return 0 if ixx + iyy = 0.
(MAYBE: fix inertia calc: integrate dm over each segment rather than dm.pt[i])