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

Importing from 3D file formats

At the beginning of this chapter, we listed a number of formats that are supported by Three.js. In this section, we’ll quickly walk through a few examples of those formats.

The OBJ and MTL formats

OBJ and MTL are companion formats and are often used together. An OBJ file defines the geometry, and an MTL file defines the materials that are used. Both OBJ and MTL are text-based formats. A part of an OBJ file looks like this:

v -0.032442 0.010796    0.025935
v -0.028519 0.013697    0.026201
v -0.029086 0.014533    0.021409
usemtl Material 
s   1   
f   2731    2735 2736 2732
f   2732    2736 3043 3044

An MTL file defines materials, as follows:

newmtl Material
Ns  56.862745   
Ka  0.000000    0.000000    ...