vega prime与C++混合编程实例，模拟驾驶车辆运动，可以左转右转，加速减速，刹车等功能，可以用键盘和鼠标控制。-This sample illustrates the use of the drive motion model (vpMotionDrive). It defines the class myApp, which is derived from vpApp, and overrides the vpApp::onKeyInput() method to allow for