## Description:
Small-island removal previously ran only on the full-size terrain. The
compact (4x downscaled) map inherited that filtering before being
downscaled, which meant islands that survived at full size could end up
as tiny specks in the compact map.
This PR runs `removeSmallIslands` on the 4x terrain as well, with half
the threshold (15 vs 30 tiles), so very small islands are pruned in
compact maps while the full-size map is unchanged.
## 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
## Pathfinding with HPA*
Hi! The primary objective of this PR is to replace per-tile A* with
hierarchical pathfinding - HPA*. In practice, this means we create an
abstract graph on top of the actual map with far fewer points and use it
to decide on general path structure. Only then we go back to tile-level
and build path between selected waypoints. This speeds up long distance
pathfinding by over 1000x in some cases. To make the review easier, it
comes with a benchmark and visual playground.
## PREPROCESSING
H part of HPA* means "hierarchical" and requires preprocessing.
This PR includes pre-processing as part inside `new Game()` constructor.
It takes about 135ms for `giantworldmap` on my machine, which increases
the effective initialization from ~95ms to ~230ms. This time could be
reduced in different ways, which are **out of scope** for this PR.
After confirming the initialization time is bearable on low-end devices,
I argue merging this PR as-is is acceptable tradeoff. It creates small
lag at the beginning of a round but pays for itself in the first minute
of the match.
## Nerdy details
**Architecture**
- HPA*-style hierarchical pathfinding
- 32×32 sectors on minimap with gateway nodes on borders
- Gateway graph built via BFS during preprocessing
- Water component optimization skips unreachable gateway pairs
- A* on gateway graph → local A* within sectors → Bresenham path
smoothing
- Minimap upscaling identical to currently used in MiniAStar
**Key Optimizations**
- Typed arrays instead of high-level primitives
- Stamp-based visited tracking (no need to recreate buffers, O(1)
clearing)
- Optional - enabled by default - caching of tile paths between gateways
- Line of sight smoothing for the final path
## Review Focus
Play with included tools, benchmark and visualization. Pathfinding
should be safe to merge as a black box - you do not need to understand
the details. Outcomes can be tested empirically in-game. Visualize (and
share!) edge cases with included playground. Confirm the 100x speedup is
real with benchmark.
If you plan to dive into the code, I suggest the following order:
- Pathfinding abstraction in `src/core/pathfinding/`
- Pathfinding tests in `tests/core/pathfinding/`
- NavMesh in `src/core/pathfinding/navmesh/` + integration with
`Game.ts`
- Benchmark in `tests/pathfinding/benchmark/`
Do not look at playground's code, it has been created with a clanker.
The design is 100% mine and I spent way too long polishing it, but I
haven't even once edited the code manually. There is probably no
abstraction whatsoever, just do not look at the code, let it play.
## Core Changes
#### Pathfinding (`src/core/pathfinding/navmesh/`)
- HPA* + refinement -> three phased pathfinding: A* over the graph ->
naive path -> refinement
- comes with A* and BFS optimized for for specific needs
#### Pre-Processing (`src/core/pathfinding/navmesh/`)
- identify water bodies to avoid pathfinding between disconnected nodes
- create high-level graph of gateways on top of tile map
#### Abstraction (`src/core/pathfinding/`)
- common `PathFinder` interface that can return full path and also act
as state machine (`.next()`)
- adapters for both new and legacy algorithm with fallback to legacy if
navigation mesh not available
#### Benchmark (`tests/pathfinding/benchmark/`)
- `npx tsx tests/pathfinding/benchmark/run.ts` - no guesswork, numbers
- `npx tsx tests/pathfinding/benchmark/run.ts --synthetic` - 1000s of
synthetic paths
- `npx tsc tests/pathfinding/benchmark/generate.ts` - generate more as
needed, test new maps
- includes ONE synthetic scenario to avoid PR bloat, generate more
locally / later
#### Playground (`tests/pathfinding/playground/`)
- `npx tsx tests/pathfinding/playground/server.ts` - visualize paths
with both new and legacy algorithm
## Benchmarks
### Compared with legacy in default - hand picked - scenario:
```
Initialization: 95.95ms -> 227.29ms
Pathfinding: 3038.43ms -> 6.45ms
Distance: 26972 -> 26810 tiles
```
### 42,000 synthetic routes across all maps
```
Running 42 synthetic scenarios with hpa.cached adapter...
✅ synthetic/achiran | Init: 93.42ms | Path: 139.07ms | Dist: 1481630 tiles | Routes: 1000/1000
✅ synthetic/africa | Init: 87.14ms | Path: 155.08ms | Dist: 1829414 tiles | Routes: 1000/1000
✅ synthetic/asia | Init: 57.60ms | Path: 112.55ms | Dist: 1204082 tiles | Routes: 1000/1000
✅ synthetic/australia | Init: 78.18ms | Path: 77.12ms | Dist: 978375 tiles | Routes: 1000/1000
✅ synthetic/baikal | Init: 78.26ms | Path: 152.14ms | Dist: 1600016 tiles | Routes: 1000/1000
✅ synthetic/baikalnukewars | Init: 81.44ms | Path: 165.90ms | Dist: 1699283 tiles | Routes: 1000/1000
✅ synthetic/betweentwoseas | Init: 29.29ms | Path: 114.99ms | Dist: 1338075 tiles | Routes: 1000/1000
✅ synthetic/blacksea | Init: 30.66ms | Path: 93.14ms | Dist: 949217 tiles | Routes: 1000/1000
✅ synthetic/britannia | Init: 74.12ms | Path: 85.62ms | Dist: 866752 tiles | Routes: 1000/1000
✅ synthetic/deglaciatedantarctica | Init: 105.49ms | Path: 192.93ms | Dist: 1574684 tiles | Routes: 1000/1000
✅ synthetic/didier | Init: 81.51ms | Path: 153.70ms | Dist: 1734876 tiles | Routes: 1000/1000
✅ synthetic/eastasia | Init: 49.29ms | Path: 128.63ms | Dist: 1410270 tiles | Routes: 1000/1000
✅ synthetic/europe | Init: 92.55ms | Path: 178.35ms | Dist: 1525216 tiles | Routes: 1000/1000
✅ synthetic/europeclassic | Init: 33.50ms | Path: 104.40ms | Dist: 1209759 tiles | Routes: 1000/1000
✅ synthetic/falklandislands | Init: 63.00ms | Path: 107.41ms | Dist: 1080251 tiles | Routes: 1000/1000
✅ synthetic/faroeislands | Init: 71.91ms | Path: 49.52ms | Dist: 604613 tiles | Routes: 1000/1000
✅ synthetic/fourislands | Init: 45.75ms | Path: 78.91ms | Dist: 937439 tiles | Routes: 1000/1000
✅ synthetic/gatewaytotheatlantic | Init: 81.00ms | Path: 257.06ms | Dist: 2555551 tiles | Routes: 1000/1000
✅ synthetic/giantworldmap | Init: 214.25ms | Path: 220.42ms | Dist: 1976693 tiles | Routes: 1000/1000
✅ synthetic/gulfofstlawrence | Init: 45.16ms | Path: 96.05ms | Dist: 1014604 tiles | Routes: 1000/1000
✅ synthetic/halkidiki | Init: 74.68ms | Path: 149.39ms | Dist: 1546781 tiles | Routes: 1000/1000
✅ synthetic/iceland | Init: 58.72ms | Path: 78.16ms | Dist: 1001554 tiles | Routes: 1000/1000
✅ synthetic/italia | Init: 29.78ms | Path: 139.93ms | Dist: 1412024 tiles | Routes: 1000/1000
✅ synthetic/japan | Init: 161.07ms | Path: 118.65ms | Dist: 1154393 tiles | Routes: 1000/1000
✅ synthetic/lemnos | Init: 52.59ms | Path: 136.69ms | Dist: 1481101 tiles | Routes: 1000/1000
✅ synthetic/lisbon | Init: 49.27ms | Path: 86.53ms | Dist: 1032011 tiles | Routes: 1000/1000
✅ synthetic/manicouagan | Init: 53.74ms | Path: 110.52ms | Dist: 1307630 tiles | Routes: 1000/1000
✅ synthetic/mars | Init: 29.39ms | Path: 80.55ms | Dist: 1091702 tiles | Routes: 1000/1000
✅ synthetic/mena | Init: 26.37ms | Path: 120.09ms | Dist: 1272751 tiles | Routes: 1000/1000
✅ synthetic/montreal | Init: 26.08ms | Path: 106.77ms | Dist: 1187736 tiles | Routes: 1000/1000
✅ synthetic/newyorkcity | Init: 56.60ms | Path: 181.19ms | Dist: 1753875 tiles | Routes: 1000/1000
✅ synthetic/northamerica | Init: 96.29ms | Path: 123.02ms | Dist: 1217221 tiles | Routes: 1000/1000
✅ synthetic/oceania | Init: 52.81ms | Path: 51.96ms | Dist: 482373 tiles | Routes: 1000/1000
✅ synthetic/pangaea | Init: 21.29ms | Path: 56.58ms | Dist: 716189 tiles | Routes: 1000/1000
✅ synthetic/pluto | Init: 53.89ms | Path: 141.62ms | Dist: 1304362 tiles | Routes: 1000/1000
✅ synthetic/southamerica | Init: 85.19ms | Path: 123.03ms | Dist: 1301403 tiles | Routes: 1000/1000
✅ synthetic/straitofgibraltar | Init: 76.68ms | Path: 108.30ms | Dist: 1304592 tiles | Routes: 1000/1000
✅ synthetic/straitofhormuz | Init: 38.97ms | Path: 67.78ms | Dist: 754920 tiles | Routes: 1000/1000
✅ synthetic/surrounded | Init: 95.35ms | Path: 90.18ms | Dist: 1017142 tiles | Routes: 1000/1000
✅ synthetic/svalmel | Init: 60.58ms | Path: 104.75ms | Dist: 1235501 tiles | Routes: 1000/1000
✅ synthetic/twolakes | Init: 62.05ms | Path: 94.54ms | Dist: 1140807 tiles | Routes: 1000/1000
✅ synthetic/world | Init: 41.43ms | Path: 93.42ms | Dist: 873406 tiles | Routes: 1000/1000
Completed 42 scenarios
Total Initialization Time: 2796.32ms
Total Pathfinding Time: 5026.64ms
Total Distance: 53160274 tiles
```
## Playground
**That's the fun part**. Watch NavMesh running circles around legacy
`PathFinder.Mini` in real time. Debug inner workings, test edge cases,
share URLs for debugging.
https://github.com/user-attachments/assets/34e2e3f5-fbc1-4b1f-917d-820766e98d5d
## Discord Tag
`moleole`
## Description:
This PR removes the nation strength. Reasoning:
- It is currently unused. The backstory can be found in #2498
- It forces map-makers to do balancing work, which is probably not a
good idea
- It increases map-making work
- It increases nation balancing complexity by a lot (we need to have all
the json files in mind)
- It makes humans avoid map areas completely because there is always
that one, same, strong nation
- The map lead Nikola123 wants to "not deal with the stupid nations and
their balancing"
If the goal of nation strength was to make them feel different I would
suggest a nation personality system. Nations that love to boat, love to
ally, love to nuke, love to fullsend, etc.
Link to a discord discussion about nation strength:
https://discord.com/channels/1359946986937258015/1360078040222142564/1450973197251117218
## 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
## Description:
Create mini map option
<img width="741" height="234" alt="Screenshot 2025-09-25 at 4 47 47 PM"
src="https://github.com/user-attachments/assets/6c442698-8e3b-44d5-b07e-c4f0a916c3bc"
/>
## 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
## Description:
Move the MapGenerator repo into OpenFrontIO so we don't need to copy
generated map files over.
## 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
## Description:
Created test that has astar pathfind from top left to bottom right of
giant world map.
* Before these changes: took ~950ms
* replaced queue with fastqueue library: ~600ms
* Changes heuristic to be more greedy (1.1 * dist => 2 * dist): ~90ms
Resulting in a roughly 10x improvement.
Other paths also saw improvements as well, although not as dramatic.
## 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
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors
## Please put your Discord username so you can be contacted if a bug or
regression is found:
evan
## Description:
To simply the map binary data, remove height & width data to the
manifest
## 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
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors
## Please put your Discord username so you can be contacted if a bug or
regression is found:
evan
## Description:
Move map generation outside of main repo, it has been rewritten in Go
and is much faster. Also refactor how maps are stored, one dir per map.
The map binaries are basically identical to before. Some maps like
Africa have 1% difference in bytes, but playing it looks exactly the
same.
Use lazy loading for map data access so only needed files are accessed.
Unit tests now load map binary instead of regenerating it from scratch,
speeding them up.
## 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
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors
## Please put your Discord username so you can be contacted if a bug or
regression is found:
evan
FloPinguin