struct in UnityEngine.Experimental.XR
切换到手册描述真实世界点的变换数据。
要跟踪和稳定真实世界中的重要点，请在感兴趣的位置添加 ReferencePoint，并响应对此 ReferencePoint 的更新。当设备更加全面地了解点在 Unity 空间中的位置后，每一帧、每个 ReferencePoint 都可以更新其位置和旋转（请参阅 Environment.ReferencePointUpdated）。
| Id | 整个会话中唯一参考点的 ID。 |
| Pose | 参考点的姿势（位置和旋转）。响应此姿势的变化，以纠正设备对真实世界中该点所处位置的了解所发生的变化。 |
| TrackingState | 参考点的 TrackingState。 |
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