Anonymous

void Screensaver::update(double time){    rotation = time*0.1;        double timestep = (time-last_update);    bool need_sort = false;        std::vector<NumberStream>::iterator it;    for (it = numbers.begin(); it != numbers.end(); ++it) {        it->translate(0, timestep*it->get_speed(), 0);                if(it->get_position().y > 8) {            it->set_position(drand(-5, 5), -20, drand(-9, 1));            it->set_speed(drand(0.1, 0.2));            need_sort = true;        }    }    if (need_sort) {        std::sort(numbers.begin(), numbers.end(), DepthSortingComp());    }    last_update = time;}