AnalyticalGraphicsInc/cesium — pull request #181 by pjcozzi (2012-08-28 12:07:47+00:00)
Title: Incremental ViewportQuad improvements

This is a few incremental improvements to the `ViewportQuad`. It still needs doc and explicit tests as it did before, but the public interface is going to change significantly with the post-processing framework. In the meantime, these are worthwhile changes:

* Render in clip coordinates so all viewport quads can share the same vertex array. This should be slightly faster and use slightly less memory, but we'll never notice.
* Made `PerformanceDisplay` and any `ViewportQuad` added directly to the Scene (as opposed to explicitly calling `update` and `render`) work again.

@kring I suggest merging this into your branch. However, this will need master for the latest culling changes.