mrdoob/three.js — pull request #1775 by qiao (2012-04-20 12:37:35+00:00)
Title: Fixed vertex normals of CylinderGeometry

The vertex normals were wrong for cones.

This pull request fixed it by calculating the angle of the cone, as shown in the following figure.

![](http://i.imgur.com/jU6HG.png)