A collection of methods and properties for interacting with the VR tracking system.
| GetLocalRotation | 获取特定节点的旋转。 |
| GetNodeStates | Describes all presently connected VR nodes and provides available tracking state. |
| nodeAdded | Called when a tracked node is added to the underlying VR/AR system. |
| nodeRemoved | Called when a tracked node is removed from the underlying VR/AR system. |
| trackingAcquired | 当跟踪节点开始报告跟踪信息时，调用此事件。 |
| trackingLost | 当跟踪节点停止报告跟踪信息时，调用此事件。 |