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

Creating custom postprocessing shaders

In this section, you’ll learn how to create a custom shader that you can use in postprocessing. We’ll create two different shaders. The first one will convert the current image to a grayscale image, and the second one will convert the image to an 8-bit image by reducing the number of colors that are available.

Vertex and fragment shaders

Creating vertex and fragment shaders is a very broad subject. In this section, we will only touch the surface of what can be done by these shaders and how they work. For more in-depth information, you can find the WebGL specification at An additional resource, full of examples, is Shadertoy, available at, or The Book of Shaders:

Custom grayscale shader

To create a custom shader for Three.js (and also for other WebGL libraries), you have to create two components: a vertex shader and a fragment shader...