explode c_2 e
bop c_1 c_2
bopcommon res1
-nbshapes res1
bop c_1 c_2_4
bopcommon result
-set nb_v_good 2
-set nb_e_good 1
-set nb_w_good 0
-set nb_f_good 0
-set nb_sh_good 0
-set nb_sol_good 0
-set nb_compsol_good 0
-set nb_compound_good 1
-set nb_shape_good 4
-
+checknbshapes result -vertex 2 -edge 1 -wire 0 -face 0 -shell 0 -solid 0 -compsolid 0 -compound 1 -shape 4
set 2dviewer 1