3 Commits

Author SHA1 Message Date
FloPinguin 7654537a00 Much better river handling for nations and tribes! 🏞️ (#3786)
## Description:

In this example, the two nations DONT see each other as neighbors, but
as ISLANDERS. Because they dont have a direct border connection, there
is water in between.

<img width="526" height="329" alt="image"
src="https://github.com/user-attachments/assets/cf2c15b5-7793-4445-afd2-920d6cd50a2a"
/>

This is a big problem, because most of the logic in AiAttackBehavior
gets ignored. Only the "islander" strategy runs (late, because its a
not-important strat).

### Summary

- `PlayerImpl.neighbors()` now includes cross-water neighbors: a new
`shoreReachableNeighbors()` helper samples every 10th shore border tile
and looks up to 5 tiles in each cardinal direction across water, finding
land owners on the other side (covers rivers up to 4 tiles wide).

- `AiAttackBehavior.maybeAttack()` extends the `hasNonNukedTerraNullius`
check to also trigger on TN detected via `player.neighbors()`, so
nations notice and pursue TN that is only reachable across a river.

- `sendAttack()` uses a new `hasLandBorderWithTerraNullius()` land-only
adjacency check to decide between a land attack and a boat attack for
TN, rather than `sharesBorderWith()` which includes water tiles.

- Added `sendBoatAttackToNearbyTerraNullius()`: when no TN land is
directly adjacent, the AI scans its shore border tiles for unowned land
across water and dispatches a transport ship.

### Also works for Tribes!

Tribes can boat rivers now, really cool.


https://github.com/user-attachments/assets/382e85aa-c437-4e0c-afc2-0c381432da3d

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

FloPinguin
2026-04-28 18:25:11 -06:00
Evan 3e65d08942 reduce train gold after each city (#3400)
## Description:

Now that cities snap to existing rails, it's possible to line up dozens
of cities in a row, producing way too much gold. This PR reduces the
gold after each stop to prevent that. Gold only starts decreasing after
the 3rd city.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan
2026-03-10 20:16:47 -07:00
Mattia Migliorini 6a30d2b38b Smarter factory placement for Nation AI 🤖 (#3244)
## Description:

Introduces a dedicated `factoryValue()` scoring function for AI factory
placement, replacing the generic `interiorStructureValue()` previously
shared with cities and missile silos.

Scoring criteria:
- High elevation and spacing from other factories (unchanged from
city/silo logic)
- Rail connectivity: bonus per distinct rail cluster reachable within
`trainStationMaxRange`, weighted by trade gold potential — allied
clusters score highest (1.0), team/neutral clusters score ~0.71, own
clusters ~0.29 (based on `config.tradeGold()` values). Based on
difficulty
- Cluster deduplication: connecting to the same cluster multiple times
does not inflate the score
- Embargoed and bot neighbors are excluded; all other non-embargoed
neighbors are included

The result is that the AI tends to place factories where they can bridge
separate rail networks or connect to high-value trade partners, rather
than deep in its own interior.

### EDIT

Added a dedicated `cityValue()` scoring function that takes into account
the connectivity score. This allows placement of cities in a
"factory-aware" way, while also enforcing spreading structures (we want
the network to grow, not a cluster of cities and factories all
together).

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

deshack_82603

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-02-21 21:12:44 -06:00