Using marker targets for this project is not necessary for wearable AR devices, such as HoloLens, but you can; earlier, we did build and run the app on HoloLens using Vuforia for marker recognition. Instead, we could use spatial mapping to locate where to place virtual objects in space. For that, we do not need to use Vuforia at all. We will see this HoloLens implementation using MixedRealityToolkit for Unity from Microsoft.

In the handheld version of our project, we provided a screen-space button to toggle the game time speed. We also provided separate AR markers on cards to let the user center their view on a specific planet. For HoloLens, we'll simplify this. We will provide a single selection to alternate (toggle) between a fast-rotating full solar system view and a slowed-down zoom of the earth. Fortunately, we can use much of the code we wrote earlier with just one additional script.