scm_c_define_gsubr ("box3d-reset!", 2, 0, 0, (scm_t_subr)box3d_reset);
scm_c_define_gsubr ("make-box3d", 0, 0, 0, (scm_t_subr)make_box3d);
scm_c_define_gsubr ("box3d-reset!", 2, 0, 0, (scm_t_subr)box3d_reset);
scm_c_define_gsubr ("make-box3d", 0, 0, 0, (scm_t_subr)make_box3d);