Input Providers

Input providers 已在MRTK组件的Registered Service Providers Profile注册

这些是开箱即用的input providers，以及它们相应的controllers(控制器)：

Input Provider	Controllers
`Input Simulation Service`	Simulated Hand
`Mouse Device Manager`	Mouse
`OpenVR Device Manager`	Generic OpenVR, Vive Wand, Vive Knuckles, Oculus Touch, Oculus Remote, Windows Mixed Reality OpenVR
`Unity Joystick Manager`	Generic Joystick
`Unity Touch Device Manager`	Unity Touch Controller
`Windows Dictation Input Provider`	无
`Windows Mixed Reality Device Manager`	WMR Articulated Hand, WMR Controller, WMR GGV Hand
`Windows Speech Input Provider`	无

Dictation and Speech providers 不创建任何控制器, 它们直接引发自己的专用输入事件。

可以通过实现IMixedRealityInputDeviceManager 接口来创建自定义input providers