title: Get interacted object in htc Vive
body: <p>I just start to learn HTC vive app development with unity and want to interact with Object and want to get it as controller interact with it.
  Try to learning form <a href="https://github.com/thestonefox/SteamVR_Unity_Toolkit/blob/master/DOCUMENTATION.md#prefabs" rel="nofollow">StreamVR Unity Toolkit documentation</a>. I found a scene in sample demo where Gameobject are interacting through controller but there are so many scripts involved. I am amazed that on a cube VRTK_InteractalbeObject is attached and it is responding to controller. how can i get interacted object in htc vive.?</p>