Rocket game is a simple but competetive deterministc rocket racing game including a map editor build as a web-app.
- Install
yarn - Run
yarn - Run
yarn dev
Website is running at http://localhost:3000 and API is running at http://localhost:3002
Rocket game in itself is a very simple obstacle game. Maps can be built using the editor and played by users. The core idea is that the physics are deterministic. This way we can ensure the validity of replays by replaying the inputs of users and therefore prevent cheating.
Currently implemented is the editor, the game including replays and a server supporting a very primitive global fastest time for a few maps. Users can already make runs (playing and finishing a world) which then are uploaded and verified by the server. If the time is faster than the current record it is saved and displayed as the new global record. Other players can now see the current world record as a ghost (replay) flying around.
Rocketgame is implemented using React, Threejs and Rapier in its core (under packages/web) as a monorepo using turbo. The ECS (EntityComponentSystem) is a custom-written solution (under packages/runtime / packages/runtime-framework) to support the game with its deterministic requirements. The game including visuals has been factored out into packages/web-game and rewriten to use no react to improve performance. Its written in a way where we can simulate the game on server-side without having to render any graphics. The server (under packages/server) is implemented with Cloudflare Workers and d1 database with trpc to communicate between the frontend and backend.
Storage is partially optimized. Worlds and replays are binary saved using protobuf. The core size of worlds exists through vertices. These are reduced as 16 bit floats and saved only as deltas of the previous ones to improve precision. Replays are compressed using a custom made algorithm. Specifically the rotations are saved as either 16 bit float deltas or the repetition of empty deltas. This way we achieve a 4x compression ahead of gzip.