Gaze is the technique of understanding where the device is pointed at, guessing where the user is looking at and feeding that information back to the user. We can use all sorts of techniques to give feedback, such as the ones mentioned above, but we need to build this into our applications. Let's give it a try.
We will draw a circle in front of the user. This circle will help the user to identify where the system is looking at, so the user can position this point.
Of course, you are not limited to using a center point. If you want, you can offset this cursor to another place on the screen, or have two points that the user must place in order to determine a distance, and so on. However, for now, we will use the most common scenario-placing a small circle in the middle of the screen.
To do this, we need to do a lot of work. We will go through the...
