Line of Sight

With the pathfinding working, it shouldn't have been too much effort to implement some player line of sight... and indeed it wasn't.  Per usual, I'd say about 70% of the time required was due to dumb mistakes.

I does have a bit of artifacting around the corners caused by allowing for diagonal circle circumference points.  I'm not sure, given the larger sight distance I plan on using, that I'll do anything further with that.

Hidden/discovered terrain also works, although it's turned off for the above demo.  It does need to allow for the first view-blocking terrain to be discovered, though.

Now I have to decide whether I want to tackle the rest of map building, or try and flesh out the user interface a bit more to look like the eventual game product.