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DevelopingTom
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## Description:  The `RailroadLayer` simply displays tiles as instructed by the core worker. While it's practical for the layer to only care about the tiles, it also means it has no understanding of railroads as entities (their paths, connections, or identities). It also means that the core worker is responsible for rendering tasks such as tile orientation and construction animation, which is not expected. To support ID-based events and better separation of concerns, the rendering layer needs to be aware of complete railroads. With this change, the core worker can send the tiles once and subsequently reference railroads only by ID for all other events. #### Changes: - `RailroadLayer` now stores full railroad data instead of only individual tiles - `RailroadLayer` is responsible for animating newly built railroads - Add a new `RailroadSnapUpdate` sent when a new structure is built over an existing railroad. This event is used by `RailroadLayer` to keep railroad ID in sync. - When hovering over a railroad, the render worker is querying the core worker about overlapping railroads. Alternatively, RailroadLayer could compute overlaps itself now that it has full railroad knowledge, but this logic would need to be duplicated and kept in sync across workers. Keeping a single source of truth in the core worker is preferred. #### Edgecases: - When a structure snaps over a railroad, the original railroad is split into two new railroads. If the construction animation is still in progress, instead of resuming the animation at the correct point on the new railroads, all remaining tiles are rendered immediately - Previously, `RailroadUpdate` handled both construction and destruction. This no longer works with `RailroadSnapUpdate`, as event ordering is now pretty important and IDs may be lost before they are consumed. To address this, RailroadUpdate is split in two: `RailroadConstructionUpdate` and `RailroadDestructionUpdate`. ## 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: IngloriousTom --------- Co-authored-by: jrouillard <jon@rouillard.org>