说明：  OpenVR为VR游戏提供统一的数据接口，从而使得VR游戏不用直接与厂商的SDK打交道。因此，它可独立于游戏来添加扩展新外设。也就是说假如要添加一个新手柄或者头显时，只需要修改OpenVR端即可，而不用再去改已经开发好的VR游戏，如果直接使用厂商SDK的话，则每添加一个厂商的外设就需要改一下VR游戏内的接口。
(Openvr provides a unified data interface for VR games, so that VR games do not have to deal with the SDK of the manufacturer directly. Therefore, it can add new peripherals independently of the game. That is to say, if you want to add a new handle or head display, you only need to modify the openvr end, instead of changing the developed VR game. If you directly use the manufacturer's SDK, you need to change the interface in the VR game every time you add a manufacturer's peripheral.)