Jon Atkins 95ed0ddd7b some refactoring and improvements in rendering ...

- don't render portals or links outside the bounds. the backend returns lots of link, and some portals, outside of the data tiles
- moved more of the render pass start process inside startRenderPass function, rather than having to call separate functions in the data request code

2014-03-23 01:23:36 +00:00

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