You're reading from Learn Three.js Program 3D animations and visualizations for the web with JavaScript and WebGL

Product type Paperback

Published in Feb 2023

Publisher Packt

ISBN-13 9781803233871

Length 554 pages

Edition 4th Edition

Languages

JavaScript

Tools

Three.js

Concepts

Front End Web Development

Author (1):

Jos Dirksen

View More author details

Table of Contents (21) Chapters

Preface

1. Part 1: Getting Up and Running

2. Chapter 1: Creating Your First 3D Scene with Three.js FREE CHAPTER

3. Chapter 2: The Basic Components that Make up a Three.js Application

4. Chapter 3: Working with Light Sources in Three.js

5. Part 2: Working with the Three.js Core Components

6. Chapter 4: Working with Three.js Materials

7. Chapter 5: Learning to Work with Geometries

8. Chapter 6: Exploring Advanced Geometries

9. Chapter 7: Points and Sprites

10. Part 3: Particle Clouds, Loading and Animating Models

11. Chapter 8: Creating and Loading Advanced Meshes and Geometries

12. Chapter 9: Animation and Moving the Camera

13. Chapter 10: Loading and Working with Textures

14. Part 4: Post-Processing, Physics, and Sounds

15. Chapter 11: Render Postprocessing

16. Chapter 12: Adding Physics and Sounds to Your Scene

17. Chapter 13: Working with Blender and Three.js

18. Chapter 14: Three.js Together with React, TypeScript, and Web-XR

19. Index

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Learning advanced geometries

In this section, we’ll look at a number of advanced Three.js geometries. We will start with THREE.ConvexGeometry, which you can use to create convex hulls.

THREE.ConvexGeometry

With THREE.ConvexGeometry, we can create a convex hull from a set of points. A convex hull is the minimal shape that encompasses all these points. The easiest way to understand this is by looking at an example. If you open up the convex-geometry.html example, you’ll see the convex hull for a random set of points. The following screenshot shows this geometry:

Figure 6.1 – The convex hull encompassing all the points

In this example, we generate a random set of points, and based on these points, we create THREE.ConvexGeometry. In the example, you can use the redraw button in the menu on the right, which will generate 20 new points and draw the convex hull. If you try this for yourself, enable the material’s transparency...