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Learning Three.js: The JavaScript 3D Library for WebGL - Second Edition

Learning Three.js: The JavaScript 3D Library for WebGL - Second Edition

By : Jos Dirksen
4.4 (14)
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Learning Three.js: The JavaScript 3D Library for WebGL - Second Edition

Learning Three.js: The JavaScript 3D Library for WebGL - Second Edition

4.4 (14)
By: Jos Dirksen

Overview of this book

If you know JavaScript and want to start creating 3D graphics that run in any browser, this book is a great choice for you. You don't need to know anything about math or WebGL; all that you need is general knowledge of JavaScript and HTML.
Table of Contents (14 chapters)
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8
8. Creating and Loading Advanced Meshes and Geometries
13
Index

THREE.ConvexGeometry

With THREE.ConvexGeometry, we can create a convex hull around a set of points. A convex hull is the minimal shape that encompasses all these points. The easiest way to understand this is by looking at an example. If you open up the 01-advanced-3d-geometries-convex.html example, you'll see the convex hull for a random set of points. The following screenshot shows this geometry:

THREE.ConvexGeometry

In this example, we generate a random set of points and based on these points we create THREE.ConvexGeometry. In the example, you can click on redraw, which will generate 20 new points and draw the convex hull. We also add each of these points as a small THREE.SphereGeometry object to clearly show how a convex hull works. THREE.ConvexGeometry isn't included in the standard Three.js distribution, so you have to include an additional JavaScript file to use this geometry. At the top of your HTML page, add the following:

<script src="../libs/ConvexGeometry.js"></script...

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