As you remember, THREE.PointCloud renders each particle based on the vertices from the supplied geometry. This means that if we provide a complex geometry (for example, a torus knot or a tube), we can create THREE.PointCloud based on the vertices from that specific geometry. For this last section of this chapter, we'll create a torus knot, like the one we saw in the previous chapter, and render it as THREE.PointCloud.

We've already explained the torus knot in the previous chapter, so we won't go into much detail here. We're using the exact code from the previous chapter, and we've added a single menu option that you can use to transform the rendered mesh into THREE.PointCloud. You can find the example (10-create-particle-system-from-model.html) in the sources for this chapter. The following screenshot shows the example:

As you can see in the preceding screenshot, every vertex used to generate the torus knot is used as a particle. In this...