AnalyticalGraphicsInc/cesium — pull request #202 by mramato (2012-08-31 18:39:29+00:00)
Title: Cleanup, doc, test and optimize EllipsoidTangentPlane and Ray

There was some collateral cleanup as well, but nothing that affects API or doc.

Question: Will we always want `Ray.direction` to be a unit vector? Or should we allow for non-unit lengths to signify magnitude? Currently it normalizes during construct. @pjcozzi @bagnell