./assert_modes_mass_normalised ./assert_orthogonal_eigenvectors ./free_modes_principal_axes ./get_mode_zeta ./mode_sign_convention ./scale_mass_normalised_modes ./scale_mode ./write_modes_vtk ./write_zeta_vtk
./assert_modes_mass_normalised ./assert_orthogonal_eigenvectors ./free_modes_principal_axes ./get_mode_zeta ./mode_sign_convention ./scale_mass_normalised_modes ./scale_mode ./write_modes_vtk ./write_zeta_vtk