Need a game over state about 2048-2600

[unwiredben]

OK, just played some more, and this is more complicated than I thought... you enter this state when all tiles are full and there's no way to move in any direction. This means detecting this requires running the shift logic in both directions, but without doing the actual shift. I think it's still worthy to implement, but it's not as easy as I thought.

[chesterbr]

Yep... if memory was not an issue, it might be possible to do it that way. A cheaper option is traversing once with +1 vector, then 4 times with +5 with increasing delta searching for duplicates, but for now simply not allowing any move should suffice. Will likely return to this problem when/if I tackle multiplayer, I suppose. Thanks for investigating!

[chesterbr]

Just FYI, I added the game over detection. I figured out that it was easier to find if the game is NOT over: that happens when you either

• have at least one empty cell (regardless of merge possibilities)
• have two adjacent cells with the same value (meaning you can shift even if there is no empty space)

The code only iterates once, searching for either of these conditions and stopping once it finds one. If it passes the last cell and neither is found, we have a game over situation.