Orbit Visualizer

Tool for visualizing orbits that was presented at Svelte Summit, Spring 2025.

Link to Talk

Important Notes

• The app can only run in a browser that supports WebGPU (as of June 2025, Google Chrome is your best bet)
• If you want to serve the built app, you'll need to return the following headers from the server to use SharedArrayBuffer:

  Cross-Origin-Opener-Policy: "same-origin",
  Cross-Origin-Embedder-Policy: "require-corp",

• The app uses AssemblyScript for the orbit calculations, which produces a WebAssembly module. Running the app in dev mode automatically builds a debug version of the module while building the app builds the release version (more optimizations).

Instructions

• Install dependencies with npm install
• Run npm run start to start (with debug build of AssemblyScript Wasm module)
  • Alternatively, run npm run start:release to start the app with the release build of AssemblyScript Wasm module
• Navigate to http://localhost:5173 to view the app
  • Note that the port may be different if 5173 is already being used by another program