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Learn ARCore - Fundamentals of Google ARCore

You're reading from Learn ARCore - Fundamentals of Google ARCore Learn to build augmented reality apps for Android, Unity, and the web with Google ARCore 1.0

Product type Paperback

Published in Mar 2018

Publisher Packt

ISBN-13 9781788830409

Length 274 pages

Edition 1st Edition

Languages

JavaScript

Tools

Android

Concepts

Augmented Reality

Author (1):

Micheal Lanham

View More author details

Table of Contents (13) Chapters

Preface

1. Getting Started FREE CHAPTER

2. ARCore on Android

3. ARCore on Unity

4. ARCore on the Web

5. Real-World Motion Tracking

6. Understanding the Environment

7. Light Estimation

8. Recognizing the Environment

9. Blending Light for Architectural Design

10. Mixing in Mixed Reality

11. Performance Tips and Troubleshooting

12. Other Books You May Enjoy

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Mapping, GIS, and GPS

Unity, as we already learned, tracks its objects in 3D space using a point with a Cartesian coordinate reference system of x, y, and z. When we plot a point on a map of the world, it is no different; we need to reference the point, except that now we need to use a spherical or geographic reference system to represent a position on the earth, because as we all know, the earth is spherical. However, converting between a geographic system and Cartesian system is expensive. Many mapping applications, therefore, use an intermediary reference known as earth-centered, earth-fixed (ECEF), which represents mapping data on an earth-fixed Cartesian coordinate reference system. The following is a diagram shows the differences between Cartesian, geographic, and ECEF coordinate reference systems:

Comparison of coordinate reference systems

Now, you may have already noticed that WRLD supports ECEF out of the box. As we mentioned, since ECEF is already in a Cartesian frame of reference...

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