1. Ask in `#bugs` / `#feedback` / `#questions` on the [Official Discord](https://discord.com/invite/HN7EVzV) if you are not entirely sure if it's a bug etc.
2. Check out the trello board: https://trello.com/b/ISQncpJP/shapezio
Since this game is in the more or less early development, I will only accept pull requests which add an immediate benefit. Please understand that low quality PR's might be closed by me with a short comment explaining why.
**If you want to add a new building, please understand that I can not simply add every building to the game!** I recommend to talk to me before implementing anything, to make sure its actually useful. Otherwise there is a high chance of your PR not getting merged.
This project is based on ES5. Some ES2015 features are used but most of them are too slow, especially when polyfilled. For example, `Array.prototype.forEach` is only used within non-critical loops since its slower than a plain for loop.
1. Create your building in `src/js/game/buildings/<my_building.js>`
2. Create the building meta class, e.g. `MetaMyFancyBuilding extends MetaBuilding`
3. Override the methods from MetaBuilding you want to override.
4. Most important is `setupEntityComponents`
5. Add the building to `src/js/game/meta_building_registry.js`: You need to register it on the registry, and also call `registerBuildingVariant`.
6. Add the building to the right toolbar, e.g. `src/js/game/hud/parts/buildings_toolbar.js`:`supportedBuildings`
7. Add a keybinding for the building in `src/js/game/key_action_mapper.js` in `KEYMAPPINGS.buildings`
8. In `translations/base-en.yaml` add it to two sections: `buildings.[my_building].XXX` (See other buildings) and also `keybindings.mappings.[my_building]`. Be sure to do it the same way as other buildings do!
9. Create a icon (128x128, [prefab](https://github.com/tobspr/shapez.io-artwork/blob/master/ui/toolbar-icons.psd)) for your building and save it in `res/ui/buildings_icons` with the id of your building
10. Create a tutorial image (600x600) for your building and save it in `res/ui/building_tutorials`
12. Done! Optional: Add a new reward for unlocking your building at some point.
#### Adding a new game system
1. Create the class in `src/js/game/systems/<system_name>.js`
2. Derive it from `GameSystemWithFilter` if you want it to work on certain entities only which have the given components. Otherwise use `GameSystem` to do more generic stuff.
3. Implement the `update()` method.
4. Add the system in `src/js/game/game_system_manager.js` (To `this.systems` and also call `add` in the `internalInitSystems()` method)
5. If your system should draw stuff, this is a bit more complicated. Have a look at existing systems on how they do it.
You will need a <ahref="https://www.codeandweb.com/texturepacker"target="_blank">Texture Packer</a> license in order to regenerate the atlas. If you don't have one but want to contribute assets, let me know and I might compile it for you. I'm currently switching to an open source solution but I can't give an estimate when that's done.
