Evaluate further possible Ogre addons

[svenstaro]

There are some interesting Ogre addons that should be evaluated and possibly integrated.

These are:

*SkyX: Sky/Atmosphere rendering plugin. Currently in very poor state. Unmaintained, not compatible with recent Ogre versions, lacking cross platform support.
*Hydrax: Water rendering plugin. Currently in very poor state. Unmaintained, not compatible with recent Ogre versions, lacking cross platform support.
*caelum: Sky/Atmosphere rendering plugin. In good state, compiles. Sample are made for CEGUI.
*ogre-paging/PagedGeometry: Render thousands of entities very cheaply. In good state, compiles, samples run.
*Spacescape: Render stars and space scenes. Project in meh state: I currently unofficially maintain it but upstream seems dead.

Frankly, for most of these it would make sense to just continue development on these on our own instead of waiting for upstream. So if we take any of them in, it would mean higher efforts on our account. Still, all of them should make things easier in the long run. Since the licenses allow us to do it, we could also rip out the juicy parts and implement the rest ourselves.

If we are to maintain these ourselves, we should likely have a separate git repo just for these. Some resources for that:

• http://hgtip.com/tips/advanced/2009-11-09-create-a-git-mirror/
• http://help.github.com/submodules/
• https://git.wiki.kernel.org/index.php/GitSubmoduleTutorial
• http://help.github.com/import-from-subversion/

This needs to be evaluated as there is a lot of potential here.

[svenstaro]

ogre-paging will be integrated with #140.

[jonnenauha]

You should check out/valueate SkyX again. 0.2.1 was just released and seems to be in quite a nice state. Just stumbled on this when googling skyx stuff as am I working on updating our usage in Tundra to 0.2.1 :)

• Cross platform support is there (opengl got some love etc.)
• Maintained and under active development
• Builds with 1.7.3 (probably with 1.8 too)
• Homepage / Ogre forum thread