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The Basic Components that Make Up a Three.js Application

In the previous chapter, you learned the basics of Three.js. We looked at a couple of examples, and you created your first complete Three.js application. In this chapter, we'll dive a bit deeper into Three.js and explain the basic components that make up a Three.js application. In this chapter, you'll explore the following topics:

The main components that you can use to create a Three.js application
What you can do with the THREE.Scene object
How geometries and meshes are related
The difference between the orthographic and perspective cameras

We'll start by looking at how you can create a scene and add objects.

Key benefits

Enhance your 3D graphics with light sources, shadows, advanced materials, and textures

Load models from external sources, and visualize and animate them directly from JavaScript

Create your own custom WebGL shader and explore the postprocessing feature of Three.js

Description

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.

What you will learn

Work with the different types of materials in Three.js and see how they interact with your 3D objects and the rest of the environment

Implement the different camera controls provided by Three.js to effortlessly navigate around your 3D scene

Work with vertices directly to create snow, rain, and galaxy-like effects

Import and animate models from external formats, such as OBJ, STL, and COLLADA

Create and run animations using morph targets and bones animations

Explore advanced textures on materials to create realistic looking 3D objects by using bump maps, normal maps, specular maps, and light maps

Interact directly with WebGL by creating custom vertex and fragment shaders

What do you get with eBook?

Instant access to your Digital eBook purchase

Download this book in EPUB and PDF formats

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Michael Stather Jun 05, 2021

Super ;)

Amazon Verified review

Benjamin Kieper Aug 29, 2023

Es wird gerade soviel gezeigt, dass man ein 3D Modell laden kann. Es wäre aber genug Platz für LOD oder Layers gewesen...

Rax Jan 30, 2020

El libro tiene muy buena información, pero requerí investigar por mi cuenta para completar un proyecto que tenia.

Janco Verduin Feb 13, 2024

First i was sent the wrong version and then they claimed it was my fault. After several emails I finally got the pdf I thought I had bought, buy their service is repulsive.

Feefo Verified review

Component	Description
Camera	This determines what is rendered on the screen.
Lights	These have an effect on how materials are shown and are used when creating shadow effects (discussed in detail in Chapter 3, Working with the Different Light Sources Available in Three.js).
Objects	These are the main objects that are rendered from the perspective of the `camera`, they include cubes, spheres, and point clouds.
Renderer	Uses the `camera` and the information from the scene to draw the output on the screen.

Learn Three.js: Programming 3D animations and visualizations for the web with HTML5 and WebGL , Third Edition

What do you get with eBook?

Learn Three.js

The Basic Components that Make Up a Three.js Application

Creating a scene

Geometries and meshes

The properties and functions of a geometry

Different cameras for different uses

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Learn Three.js: Programming 3D animations and visualizations for the web with HTML5 and WebGL , Third Edition

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