FloPinguin
805f0968b1
## Description: Relates to #3725 Adds a new **Impassable** terrain type that enables non-rectangular maps and creates impassable barriers on the map. Painted with pure black (`#000`) in the map editor's `image.png`. **Encoding:** Impassable terrain is encoded in the binary format as `isLand=1, magnitude=31` (previously unused). The Go map generator detects `#000` pixels and produces this encoding. The map generator's minimap downscaling gives impassable highest priority (Impassable > Water > Land). Thumbnails render impassable as transparent so the map picker background shows through. **Rendering:** Impassable tiles render as the map background colour (`rgb(60, 60, 60)`, matching `gl.clearColor` in `Renderer.ts`), making them visually indistinguishable from the area outside the map quad. This enables maps to appear non-rectangular. **Gameplay restrictions:** Impassable terrain cannot be: - Owned (`conquer()` throws) - Attacked (`AttackExecution` skips impassable tiles in both `tick()` and `addNeighbors()`) - Nuked (targeting rejected in `nukeSpawn()`, blast radius filtered in `tilesToDestroy()`) - Spawned on (nations, human players, and structures all reject impassable tiles) - Converted to water (guarded in `WaterManager` and `setWater()`) **Nuke trajectories:** Nuke trajectories cannot cross impassable terrain, matching the existing map-border enforcement. This is checked at launch time in `NukeExecution.tick()`. The client-side trajectory preview turns red with a red X where the arc crosses impassable terrain (reusing the existing SAM-intercept visual pipeline in `NukeTrajectory.ts`). The nuke ghost preview is completely hidden when hovering over impassable terrain (same as hovering outside the map). https://github.com/user-attachments/assets/ff131146-9749-41e0-892a-617e5cd16c54 Impassable terrain is transparent on the thumbnail: <img width="213" height="152" alt="Screenshot 2026-06-18 211640" src="https://github.com/user-attachments/assets/ede16f8c-9239-4ab1-be5d-0ba81cce5e9e" /> Tested with water nukes, made sure there is no water depth gradient near the impassable terrain, just like at the world border: <img width="774" height="771" alt="Screenshot 2026-06-18 212348" src="https://github.com/user-attachments/assets/4429069d-911b-48e8-91e3-7307d42c9397" /> Models used: GLM 5.2 and MiMo 2.5 Pro 😄 ## 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 ## Please put your Discord username so you can be contacted if a bug or regression is found: FloPinguin
OpenFront.io is an online real-time strategy game focused on territorial control and alliance building. Players compete to expand their territory, build structures, and form strategic alliances in various maps based on real-world geography.
This is a fork/rewrite of WarFront.io. Credit to https://github.com/WarFrontIO.
License
OpenFront source code is licensed under the GNU Affero General Public License v3.0
Current copyright notices appear in:
- Footer: "© OpenFront and Contributors"
- Loading screen: "© OpenFront and Contributors"
Modified versions must preserve these notices in reasonably visible locations.
See the LICENSE for complete requirements.
For asset licensing, see LICENSE-ASSETS.
For license history, see LICENSING.md.
🌟 Features
- Real-time Strategy Gameplay: Expand your territory and engage in strategic battles
- Alliance System: Form alliances with other players for mutual defense
- Multiple Maps: Play across various geographical regions including Europe, Asia, Africa, and more
- Resource Management: Balance your expansion with defensive capabilities
- Cross-platform: Play in any modern web browser
📋 Prerequisites
- npm (v10.9.2 or higher)
- A modern web browser (Chrome, Firefox, Edge, etc.)
🚀 Installation
-
Clone the repository
git clone https://github.com/openfrontio/OpenFrontIO.git cd OpenFrontIO -
Install dependencies
npm run instDo NOT use
npm installnornpm ibut instead use ournpm run inst. It runs the safernpm ci --ignore-scriptsto install dependencies exactly according to the versions inpackage-lock.jsonand doesn't run scripts. This can prevent being hit by a supply chain attack.
🎮 Running the Game
Development Mode
Run both the client and server in development mode with live reloading:
npm run dev
This will:
- Start the webpack dev server for the client
- Launch the game server with development settings
- Open the game in your default browser (to disable this behavior, set
SKIP_BROWSER_OPEN=truein your environment)
Client Only
To run just the client with hot reloading:
npm run start:client
Server Only
To run just the server with development settings:
npm run start:server-dev
Connecting to staging or production backends
Sometimes it's useful to connect to production servers when replaying a game, testing user profiles, purchases, or login flow.
To replay a production game, make sure you're on the same commit that the game you want to replay was executed on, you can find the
gitCommitvalue viahttps://api.openfront.io/game/[gameId]. Unfinished games cannot be replayed on localhost.
To connect to staging api servers:
npm run dev:staging
To connect to production api servers:
npm run dev:prod
🛠️ Development Tools
-
Format code:
npm run format -
Lint code:
npm run lint -
Lint and fix code:
npm run lint:fix -
Testing
npm test
🏗️ Project Structure
/src/client- Frontend game client/src/core- Deterministic game simulation/src/server- Backend game server/resources- Static assets (images, maps, etc.)
🤝 Contributing
Contributions and translations are welcome! See CONTRIBUTING.md for the workflow, the approved-issue process, project governance, and translation info.