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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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Meshing and the environment

So, being able to identify features or corners of objects is really just the start of what we would like to know about the user's environment. What we really want to do is use those feature points to help us identify planes, surfaces, or known objects and their pose. ARCore identifies planes or surfaces automatically for us through a technique called meshing. We have already seen how meshing works numerous times in the advanced samples, when ARCore tracks surfaces. Now, before we get ahead of ourselves, let's picture what a point cloud and mesh look like in 3D, with the following diagram:

Point cloud and mesh in 3D

Note

If you pay attention to the diagram, you will see an inset figure showing a polygon and the ordered set of vertices that comprise it. Note how the order of points goes counterclockwise. Yes, the order in which we join points makes a difference to the way a surface is facing when a mesh is lit and shaded. When a scene is rendered we only see surfaces...

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