This example shows how to build up the basic environment that can interact with Unity built-in UI component.

• After opening a new scene, remove default Main Camera and add the ViveCameraRig prefab to setup a basic VR scene. This prefab simply include VR devices like HMD(Camera), controllers and trackers.

• Add VivePointers prefab into the scene. This prefab contains 2 event raycasters that can interact with the UI elements.

• Create an UI button in hierarchy.

• Remove default event system object (Optional).
• Select default canvas object.
• Remove canvas scalar component (Optional).
• Remove graphic raycaster component (Optional).
• Set render mode to "World Space".

• Click "Add Component" to add the CanvasRaycastTarget script.

• Set rect transform on canvas and button to locate them into your VR camera's sight.

• UGUI now catches events from your Vive controllers!
• You can find the complete scene in Asset/HTC.UnityPlugin/ViveInputUtility/Examples/0.Tutorial