包含与跟踪网格相关的变换信息。
此结构体由XRMeshSubsystem 用于通信有关网格变换的信息。
其他资源：XRMeshSubsystem.GetUpdatedMeshTransforms
| MeshId | 跟踪网格的会话唯一标识符。 |
| Position | 网格相对于会话原点的坐标。 |
| Rotation | 网格相对于会话原点的旋转。 |
| Scale | 网格相对于会话原点的缩放。 |
| Timestamp | 与该变换关联的时间戳。 |
| MeshTransform | 创建一个新的 MeshTransform。 |
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