[iffz]

Don't skip the absolute awesome "main page" where everything is extensively explained with interactive javascript samples.

http://www.redblobgames.com/grids/hexagons/

[choppaface]

Yes, this page is a must.

Also, this problem has some relevance outside of games: http://vincentwoo.com/2013/03/08/above-and-beyond-the-affirm...