Book Image

Learn Three.js - Fourth Edition

By : Jos Dirksen
Book Image

Learn Three.js - Fourth Edition

By: Jos Dirksen

Overview of this book

Three.js has become the industry standard for creating stunning 3D WebGL content. In this edition, you’ll learn about all the features of Three.js and understand how to integrate it with the newest physics engines. You'll also develop a strong grip on creating and animating immersive 3D scenes directly in your browser, reaping the full potential of WebGL and modern browsers. The book starts with the basic concepts and building blocks used in Three.js and helps you explore these essential topics in detail through extensive examples and code samples. You'll learn how to create realistic-looking 3D objects using textures and materials and how to load existing models from an external source. Next, you'll understand how to control the camera using the Three.js built-in camera controls, which will enable you to fly or walk around the 3D scene you've created. Later chapters will cover the use of HTML5 video and canvas elements as materials for your 3D objects to animate your models. You’ll learn how to use morph targets and skeleton-based animation, before understanding how to add physics, such as gravity and collision detection, to your scene. Finally, you’ll master combining Blender with Three.js and creating VR and AR scenes. By the end of this book, you'll be well-equipped to create 3D-animated graphics using Three.js.
Table of Contents (21 chapters)
Part 1: Getting Up and Running
Part 2: Working with the Three.js Core Components
Chapter 5: Learning to Work with Geometries
Part 3: Particle Clouds, Loading and Animating Models
Part 4: Post-Processing, Physics, and Sounds

3D geometries

In this section on basic 3D geometries, we’ll start with a geometry we’ve already seen a couple of times: THREE.BoxGeometry.


THREE.BoxGeometry is a very simple 3D geometry that allows you to create a box by specifying its width, height, and depth properties. We’ve added an example, box-geometry.html, where you can play around with these properties. The following screenshot shows this geometry:

Figure 5.9 – Basic 3D box geometry

Figure 5.9 – Basic 3D box geometry

As you can see in this example, by changing the width, height, and depth properties of THREE.BoxGeometry, you can control the size of the resulting mesh. These three properties are also mandatory when you create a new cube, as follows:

new THREE.BoxGeometry(10,10,10);

In the example, you can also see a couple of other properties that you can define on the cube. The following list explains all the properties:

  • width: This is the width of the cube. This...