gint roam_sphere_split_merge(RoamSphere *sphere);
void roam_sphere_draw(RoamSphere *sphere);
void roam_sphere_draw_normals(RoamSphere *sphere);
-GList *roam_sphere_get_intersect(RoamSphere *sphere,
+GList *roam_sphere_get_intersect(RoamSphere *sphere, gboolean all,
gdouble n, gdouble s, gdouble e, gdouble w);
void roam_sphere_free(RoamSphere *sphere);