Light!

[leopoldek]

This PR adds lighting to the world. By default, lighting is disabled to keep fps high. To enable lighting, add -l to your launch args and your set! If you decide you want to turn lighting on, make sure your using a fresh map because any changes you make won't update the light map when lighting is off. Example: TODO:

• Document code
• Clean up code
• Multi-thread it!
• There is a bug I'm aware of having to do with global lighting where, if the global light updates a chunk 2 chunks below where the block was destroyed, it won't update. But, the map is too small to run into this problem yet. Later I want to update the algorithm to make it smarter.
• Make global light respond to time of day. There is a parameter in Chunk#calculateLighting(...) to set the global light for that chunk.

And please review and give feedback!

[egordorichev]

Hmm, a few conflicts with @Col-E 's branch. Will merge it a bit later ;)

[leopoldek]

I can try to fix them right now.

[egordorichev]

Thanks a lot ;)