def get_midpoint_uv_list(uv_list):
    """
    Gets the mid point of the sorted 2d points in uv_list.
    """
    u_mid = 0.5*(uv_list[0][0] + uv_list[-1][0])
    v_mid = 0.5*(uv_list[0][1] + uv_list[-1][1])
    return u_mid, v_mid