# Unity SDK release notes

Release notes for the **AR 51 Unity SDK**, the C# package that connects a Unity project to an AR 51 capture server (**Mocap Unleashed**) and receives live motion, hand, object-detection and camera streams. Newest release first.

## 2.2.2.2R

_2023-03 · Unity · initial release_

The first shipped AR 51 Unity SDK. It gives a Unity project a direct, real-time link to an AR 51 capture server so you can drive avatars and scene logic from live markerless capture.

### New

- **Server discovery and connection.** Find an AR 51 capture server on the local network automatically and open a live streaming session, with no manual endpoint configuration required in the common case.
- **Live skeleton streaming.** Receive full-body skeletons for every tracked person in real time and drive your own rigs, avatars or gameplay from the incoming pose data.
- **Hand skeleton streaming.** Receive detailed hand and finger tracking as a separate stream, for hand-driven interaction and gestures.
- **Object detection.** Subscribe to tracked physical objects (markers/props) in the capture volume and react to their position in your scene.
- **Live camera feeds.** Pull video frames from the server's cameras, read per-camera characteristics, and record video.
- **Spatial anchors.** Align your Unity scene to the capture volume through the anchor service so tracked people and objects appear in the correct place.
- **Calibration access.** Read camera and device calibration state from the server.
- **Scene and gameplay services.** Helper services for drawing debug geometry, placing and tracking in-scene objects, and exchanging game state with the server.

### Compatibility

- Requires a compatible AR 51 capture server (**Mocap Unleashed**) on the same network.
- Delivered as a C# SDK for integration into a Unity project.

### Notes

- `2.2.2.2R` (2023-03) is the current published Unity SDK release. For capabilities beyond it, contact AR 51.