Summary

In this chapter, you expanded on the AR gallery project we began in Chapter 6, Gallery: Building an AR App. That project left us with the ability to place framed photos on our walls. In this chapter, you added the ability to edit virtual objects in the scene.

You implemented the ability to select an existing virtual object in Main-mode, where the selected object is highlighted and the app goes into EditPicture-mode. Here, there is an edit menu with buttons for Replace Image, Replace Frame, Remove Picture, and Done (return to Main-mode). The Replace Image feature displayed the same SelectImage modal menu that is used when we're creating (adding) new pictures. We had to refactor the code to make it reusable.

While placing and moving a picture on the wall, you implemented a feature to avoid overlapping or colliding objects, automatically moving the picture away from the other ones. After that, you implemented some direct interactions with the virtual objects by using...