mrdoob/three.js — pull request #3408 by kevinoe (2013-04-30 13:45:41+00:00)
Title: Trackball fixes

Adding three features to the TrackballControls:
1. Support for non-full window controls (by calculating the position of the cursor in the domElement
2. Changing to use non-spherical trackballs for rotation (independent X/Y "radius")
3. Making the "roll" on the outer edge of the trackball optional

I'm somewhat new to Javascript, but been doing OpenGL for a bit, so I'd appreciate any assistance in that department.