if (destroyoffscreen == true)
{
    if (!scr_onscreen_tolerance(id, tolerance))
        instance_destroy();
}
if (camera_lock)
{
    var _cx = camerax();
    var _cy = cameray();
    if (camera_lock_xwas == -1)
    {
        camera_lock_xwas = _cx;
        camera_lock_ywas = _cy;
    }
    if (camera_lock_xwas != _cx || camera_lock_ywas != _cy)
    {
        x += (_cx - camera_lock_xwas);
        y += (_cy - camera_lock_ywas);
    }
    camera_lock_xwas = _cx;
    camera_lock_ywas = _cy;
}