Other object creation and conversion:
fm_as_fm(),
fm_as_lattice_2d(),
fm_as_lattice_Nd(),
fm_as_mesh_1d(),
fm_as_mesh_2d(),
fm_as_mesh_3d(),
fm_as_segm(),
fm_as_sfc(),
fm_lattice_2d(),
fm_lattice_Nd(),
fm_mesh_1d(),
fm_mesh_2d(),
fm_segm(),
fm_simplify(),
fm_tensor()