Forts & Citadels

[r3versi]

New tile sprite for Fort and Citadel by @GeneralWadaling

[yairm210]

Add you've probably seen, there's a pr that's been waiting for months regarding forts.
The reason it wasn't merged is primarily because this is to big of a human cheat.
The AI needs to know how to handle forts and citadels, at the very least, and for bonus points where and when to place them.

[r3versi]

I added a method TileInfo.isFriendlyTerritory(civInfo: CivInfo) that performs the same checks that were performed in rankTileForHealing.

Add you've probably seen, there's a pr that's been waiting for months regarding forts.
The reason it wasn't merged is primarily because this is to big of a human cheat.
The AI needs to know how to handle forts and citadels, at the very least, and for bonus points where and when to place them.

Now I remember why I had this PR on standby for weeks.. 😆
I'll keep you updated if I can come up with an idea.

[JackRainy]

I would suggest the next algorithm:

The range of 2 tiles is chosen to be able to attack it by city, in case the enemies have captured the fort, and far enough to be the last line of defence, not allowing catapults and artillery reach closer.

[JackRainy]

A note to be mentioned: "Forts can be constructed on Bananas without removing the jungle." Did we take that into account?
https://civilization.fandom.com/wiki/Bananas_(Civ5)

[RobertGine]

Correct me if I'm wrong but by Jack's algorithm, the AI will build as many Forts as possible next to the closest city to the enemy, but will not defend other cities (that might also be vulnerable)?

[JackRainy]

@RobertGine, it depends what you mean by "the closest city to the enemy".
If the enemy approaches to a city, it builds the defence, if the enemy goes to another city, they build the defence there.

[RobertGine]

Oh. So the AI will throw workers in front of an attacking army?

[JackRainy]

I understand what you mean :)
That's why they should start building it a bit earlier - while relations only become bad. Same time when AI decides to build army.

[yairm210]

#2325 adds this, with AI =)