The Unity-Technologies/arfoundation-samples repository is a collection of example projects demonstrating the capabilities of AR Foundation in Unity. It showcases various augmented reality features and provides developers with practical implementations for common AR scenarios using Unity's cross-platform AR development framework.

Pros

• Comprehensive set of AR examples covering a wide range of features
• Cross-platform compatibility, supporting both iOS (ARKit) and Android (ARCore)
• Regularly updated to incorporate new AR Foundation features
• Well-documented code with clear explanations for each sample

Cons

• Requires Unity and AR Foundation knowledge to fully understand and utilize
• Some samples may not work on all devices due to hardware limitations
• Limited customization options in some examples
• May require additional setup for specific AR features or platforms

Code Examples

1. Placing an AR object on a detected plane:

public class ARPlacement : MonoBehaviour
{
    public GameObject arObjectToPlace;
    public ARRaycastManager raycastManager;

    void Update()
    {
        if (Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);
            if (touch.phase == TouchPhase.Began)
            {
                List<ARRaycastHit> hits = new List<ARRaycastHit>();
                if (raycastManager.Raycast(touch.position, hits, TrackableType.Planes))
                {
                    Pose hitPose = hits[0].pose;
                    Instantiate(arObjectToPlace, hitPose.position, hitPose.rotation);
                }
            }
        }
    }
}

2. Detecting face features:

public class FaceDetection : MonoBehaviour
{
    public ARFaceManager faceManager;

    void OnEnable()
    {
        faceManager.facesChanged += OnFacesChanged;
    }

    void OnDisable()
    {
        faceManager.facesChanged -= OnFacesChanged;
    }

    void OnFacesChanged(ARFacesChangedEventArgs args)
    {
        foreach (ARFace face in args.added)
        {
            Debug.Log($"Face detected at position: {face.transform.position}");
        }
    }
}

3. Capturing an AR screenshot:

public class ARScreenshot : MonoBehaviour
{
    public void CaptureScreenshot()
    {
        StartCoroutine(TakeScreenshot());
    }

    IEnumerator TakeScreenshot()
    {
        yield return new WaitForEndOfFrame();
        Texture2D screenshot = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
        screenshot.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
        screenshot.Apply();
        byte[] bytes = screenshot.EncodeToPNG();
        string filename = $"ARScreenshot_{System.DateTime.Now:yyyyMMddHHmmss}.png";
        System.IO.File.WriteAllBytes(Application.persistentDataPath + "/" + filename, bytes);
    }
}

Getting Started

1. Clone the repository: git clone https://github.com/Unity-Technologies/arfoundation-samples.git
2. Open the project in Unity (2019.3 or later recommended)
3. Install AR Foundation and XR Plugin Management packages via Package Manager
4. Open a sample scene from the Scenes folder
5. Build and run on a supported AR device (iOS or Android)

Note: Ensure your Unity installation supports AR development for your target platform (iOS or Android) and that you have the necessary SDKs installed.