The googlevr/gvr-unity-sdk repository is the official Google VR SDK for Unity. It provides developers with tools and resources to create virtual reality experiences for Google Cardboard and Daydream platforms using the Unity game engine. This SDK enables easy integration of VR features into Unity projects, supporting a wide range of devices.

Pros

• Easy integration with Unity projects
• Supports both Google Cardboard and Daydream platforms
• Provides a comprehensive set of VR features and tools
• Regular updates and maintenance from Google

Cons

• Limited to Google VR platforms (Cardboard and Daydream)
• May require additional setup for certain Unity versions
• Some features may be deprecated as VR technology evolves
• Learning curve for developers new to VR development

Code Examples

1. Initializing the GVR SDK:

using GoogleVR;

void Start()
{
    GvrViewer.Create();
}

2. Implementing head tracking:

using UnityEngine;
using GoogleVR;

public class HeadTracking : MonoBehaviour
{
    void Update()
    {
        transform.rotation = GvrViewer.Instance.HeadPose.Orientation;
    }
}

3. Handling controller input:

using UnityEngine;
using GoogleVR.Input;

public class ControllerInput : MonoBehaviour
{
    void Update()
    {
        if (GvrControllerInput.ClickButtonDown)
        {
            // Handle click event
        }
    }
}

Getting Started

1. Import the GVR SDK package into your Unity project.
2. Add the GvrEditorEmulator prefab to your scene.
3. Set up your camera:

   using UnityEngine;
   using GoogleVR;
   
   public class CameraSetup : MonoBehaviour
   {
       void Start()
       {
           Camera.main.clearFlags = CameraClearFlags.SolidColor;
           Camera.main.backgroundColor = Color.black;
           Camera.main.nearClipPlane = 0.1f;
       }
   }
   

4. Build and run your project on a supported device or emulator.

For detailed documentation and advanced features, refer to the official Google VR SDK documentation.