Book Image

Augmented Reality for Developers

By : Jonathan Linowes, Krystian Babilinski
Book Image

Augmented Reality for Developers

By: Jonathan Linowes, Krystian Babilinski

Overview of this book

Augmented Reality brings with it a set of challenges that are unseen and unheard of for traditional web and mobile developers. This book is your gateway to Augmented Reality development—not a theoretical showpiece for your bookshelf, but a handbook you will keep by your desk while coding and architecting your first AR app and for years to come. The book opens with an introduction to Augmented Reality, including markets, technologies, and development tools. You will begin by setting up your development machine for Android, iOS, and Windows development, learning the basics of using Unity and the Vuforia AR platform as well as the open source ARToolKit and Microsoft Mixed Reality Toolkit. You will also receive an introduction to Apple's ARKit and Google's ARCore! You will then focus on building AR applications, exploring a variety of recognition targeting methods. You will go through multiple complete projects illustrating key market sectors including business marketing, education, industrial training, and gaming. By the end of the book, you will have gained the necessary knowledge to make quality content appropriate for a range of AR devices, platforms, and intended uses.
Table of Contents (16 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Adding a master speed rate UI


One last feature I'd really like to have. When Gametime Per Day of GameController is set to 0.1, the planet orbits are dynamically animated, nice and fast. But that's too fast to see the planet surfaces. When Gametime Per Day is slowed down, say, to 24, we can see the planet texture more clearly, but the orbits are barely noticeable. Let's provide a button to let users toggle between these speeds. Remember, this value is the number of game seconds per earth hour. So, 24 will show one earth day in 24 seconds; 0.05 will show one earth year in about 18 seconds. It should start out fast, and when you press the button, everything slows down, hence, inspect GameController and ensure Gametime Per Day is set to 0.05.

Creating a UI canvas and button

In Unity, user interface (UI) buttons reside on a canvas. Create a canvas:

  1. In Hierarchy, select Create | UI | Canvas.
  2. Select Canvas and change UI Scale Mode to Constant Physical Size.

By default, the Canvas UI Scale Mode is set...