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# Changelog

All notable changes to the Beam Eye Tracker SDK will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

### [2.1.0] - 2025-04-10

#### Added

- Foveated rendering support

  - FoveatedRenderingState: gaze coordinates and radii that define high to low resolution areas

- Unity support

  - BeamEyeTrackerInputDevice class that provides a custom input device based on Unity InputSystem

  - BeamEyeTrackerMonoBehaviour class that allows easy access to the input device

  - CameraControlBehaviour and ImmersiveHUDPanelBehaviour classes that implement the in-game camera control and immersive HUD features in Unity

  - BeamEyeTrackerControls.inputactions that define actions like camera recentering

- Documentation

  - Added comprehensive documentation for SDK concepts

  - C/C++/C#/Python API references

  - Unity guide

#### Fixed

- Potential crash on shutdown

### [2.0.1] - 2025-02-15

#### Fixed

- Fixed handling of paths containing non-Western characters

### [2.0.0] - 2025-02-01

#### Added

- Releasing brand new API with these features:

  - UserState: head pose and gaze coordinates parameters (now supporting multiple displays)

  - SimGameCameraState: ready to use 6 DOF camera controls

  - GameImmersiveHUDState: signal indicating if the user is looking at either 4 corners or edges

  - Synchronous, asynchronous and polling-based tracking data access

  - Privacy control - Beam app can manage data access per-client

  - Clients can launch the Beam and start the tracking/webcam

- C/C++/C#/Python APIs

- Future-proof design:

  - Features logic fully delegated to the Beam application (not hardcoded in the client)

    - Gives room to improve user experience without increasing client work load

  - C/C++ APIs designed to be ABI stable and easy to extend with new features

  - Forward and backward client compatibility with Beam app versions (from v2.4.0)

    - Handshaking mechanism

    - Per-client tracking data messaging filtering

    - Future-proof serialization

#### Changed

- Complete API redesign focusing on stability and extensibility

- Enhanced documentation and samples

#### Removed

- API v1.0

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