Initializes the given #graphene_box_t with the given array of vertices.
If n_points is 0, the returned box is initialized with graphene.box.Box.empty.
an array of #graphene_point3d_t
the initialized #graphene_box_t
Initializes the given #graphene_box_t with the given array of vertices.
If n_points is 0, the returned box is initialized with graphene.box.Box.empty.