function o = movie_pts(P, T, projection)
for i = 1:size(T,2)
    t = T(:,i);
    if projection == 'p'
        display_image_pts(perspective_project(translate_points(P,t)));
    else
        display_image_pts(weak_perspective_project(translate_points(P,t)));
    end
    M(i) = getframe;
end
movie(M,2,6);