public SandBox()
{
//Robot 输入操作定时器，robot每隔timer.Interval产生一次操作
Timer timer = new Timer();
timer.Enabled = true;
timer.Interval = 1.0 / Config.fps * 1000;
timer.Start();
timer.Elapsed += new ElapsedEventHandler(sandbox_update);
s_robotSystem.generate_robots(Config.numRobotsCreate);
m_robots = s_robotSystem.get_robots();
}