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Learning Three.js – the JavaScript 3D Library for WebGL - Second Edition by Jos Dirksen

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Using binary operations to combine meshes

In this section, we'll look at a different way of creating geometries. In this chapter, so far, and in the previous chapter, we used the default geometries provided by Three.js to create interesting-looking geometries. With the default set of properties, you can create beautiful models, but you are limited to what Three.js provides. In this section, we'll show you how you can combine these standard geometries to create new ones—a technique known as Constructive Solid Geometry (CSG) To do this, we use the Three.js extension ThreeBSP, which you can find online at https://github.com/skalnik/ThreeBSP. This additional library provides the following three functions:

Name

Description

intersect

This function ...

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