bsplinecurve bspline_3d_np_c_nr 2 3 0 3 1 1 2 3 0 0 0 1 1 1 1 1 1 0 0 1 0 0 0 1 extsurf es_bspline_3d_np_c_nr bspline_3d_np_c_nr 0 0 1 offset es_bspline_3d_np_c_nr_of es_bspline_3d_np_c_nr 1 mkface result es_bspline_3d_np_c_nr_of 0 1 0 3 set MaxFTol 1e-6 set MaxETol 1e-6 set MaxVTol 1e-6