How can I control the camera focus in the Unity3d plugin?
I figured out how to do this:
In Unity3d (project window), scroll to the folder named "Scripts". This is the scripts folder in the root of your project, and not the one in the Qualcomm Augmented Reality folder. There will be a file named "CameraDeviceMenu". Drag it onto "ARCamera" in the Hierarchy window on the left. Now if you run the application and click on the background, a menu will popup which allows you to focus the camera, use the flash as a flashlight, or change the focus modes.