这是一个多线程编程，模仿雷达显示屏，模拟周围的飞机位置！-it is a multi-threaded programming, copying radar screen, analog peripheral location of the aircraft!

多线程-雷达显示,难得的多线程、和图形绘制学习资料-Multithreading- radar display, a rare multi-threading, learning materials and graphics rendering