Imagine that you are sitting at your desk; in front of you is a scrap piece of paper and not too far to your left is the rubbish bin (let's be environmentally conscious and make it a recycling bin). Like many of your peers, you instinctively crumble up the piece of paper and, with your best attempt, throw the crumpled piece of paper into the bin.

There's something about this simple act that is satisfying, so much so that a game created by Backflip Studios, called Paper Toss, remained number one on the app store for most of 2009.

To get ourselves acquaint with developing for HoloLens using Unity, we will reimagine this game for mixed reality (MR); by the end of this chapter and you will know how to do the following:

• Configuring a Unity project for HoloLens
• Mapping and understanding your environment
• Placing holograms in the environment using gaze and the tap gesture
• Allowing the user to toss the paper in the bin using gaze and gestures

There is a lot to get through, so let's jump right in.