mrdoob/three.js — pull request #3411 by kevinoe (2013-04-30 15:21:15+00:00)
Title: Trackball fixes

This is a redo of a previous request - the last accidentally touched every line.

This adds three changes to the Trackball implementation:
1. Container relative coordinates
2. Oblong spheroid for the trackball (to fit the window shape)
3. Provide option for disabling the "roll" when outside of the trackball.