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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Creating a geometry by extruding a 2D shape

Three.js provides a way in which we can extrude a 2D shape into a 3D shape. By extruding, we mean stretching out a 2D shape along its z axis to convert it to 3D. For instance, if we extrude THREE.CircleGeometry, we get a shape that looks like a cylinder, and if we extrude THREE.PlaneGeometry, we get a cube-like shape. The most versatile way of extruding a shape is using THREE.ExtrudeGeometry.

THREE.ExtrudeGeometry

With THREE.ExtrudeGeometry, you can create a 3D object from a 2D shape. Before we dive into the details of this geometry, let’s first look at an example, extrude-geometry.html. The following screenshot taken from the example shows this geometry:

Figure 6.6 – Creating a 3D geometry from a 2D shape

In this example, we took the 2D shape we created in the 2D geometries section in Chapter 5, and used THREE.ExtrudeGeometry to convert it to 3D. As you can see in the preceding screenshot...