What is the simplest way to draw a cylinder with a slice cut out of it with three.js?

Question

I was wondering how you would draw a cylinder with a slice cut out of it using three.js i.e. something like this: Image

All replies are much appreciated.

Answer 1

Use a THREE.CylinderGeometry and set the thetaLength-parameter. The default is 2 * Pi, which makes for a complete cylinder. I have built a fiddle that looks like your Image: http://jsfiddle.net/hvgropoa/.

Downside: the slice´s faces ar missing, so you can see inside the cylinder when looking inside the cut :( However this is the simplest way, if you need a closed Cylinder I suggest doing it with THREE.CSG.