Book Image

Learn Three.js - Third Edition

By : Jos Dirksen
1 (1)
Book Image

Learn Three.js - Third Edition

1 (1)
By: Jos Dirksen

Overview of this book

WebGL makes it possible to create 3D graphics in the browser without having to use plugins such as Flash and Java. Programming WebGL, however, is difficult and complex. With Three.js, it is possible to create stunning 3D graphics in an intuitive manner using JavaScript, without having to learn WebGL. With this book, you’ll learn how to create and animate beautiful looking 3D scenes directly in your browser-utilizing the full potential of WebGL and modern browsers. It starts with the basic concepts and building blocks used in Three.js. From there on, it will expand on these subjects using extensive examples and code samples. You will learn to create, or load, from externally created models, realistic looking 3D objects using materials and textures. You’ll find out how to easily control the camera using the Three.js built-in in camera controls, which will enable you to fly or walk around the 3D scene you created. You will then use the HTML5 video and canvas elements as a material for your 3D objects and to animate your models. Finally, you will learn to use morph and skeleton-based animation, and even how to add physics, such as gravity and collision detection, to your scene. After reading this book, you’ll know everything that is required to create 3D animated graphics using Three.js.
Table of Contents (14 chapters)

Using constraints to limit the movement of objects

Until now, we've seen some basic physics in action. We've seen how the various shapes respond to gravity, friction, and restitution, and how they affect collisions. Physijs also provides advanced constructs that allow you to limit the movement of your objects. In Physijs, these objects are called constraints. The following table gives an overview of the constraints that are available in Physijs:




This allows you to fix the position of one object to the position of another object. If one object moves, the other will move with it, keeping the distance between them the same.


HingeConstraint allows you to limit the movement of an object as if it were on a hinge, such as a door.


This constraint, as the name...