| --- |
| license: agpl-3.0 |
| language: |
| - en |
| tags: |
| - typescript |
| - simulation |
| - spacecraft |
| - physics |
| - three-js |
| - browser |
| - sdk |
| - zero-dependencies |
| - sovereign |
| - snapkitty |
| - flight-model |
| - telemetry |
| - guidance |
| - hardware |
| - javascript |
| task_categories: |
| - other |
| size_categories: |
| - n<1K |
| pretty_name: orbital-one — Browser Spacecraft Simulator + SDK |
| --- |
| # orbital-one |
|
|
| **Browser spacecraft simulator and headless flight-model SDK.** |
|
|
| Launch from the pad, fly a two-stage ascent to orbit — or import the sim engine directly into your own project. |
|
|
| SnapKitty West / SNAPKITTYWEST — MIT License — 2026 |
|
|
| --- |
|
|
| ## What It Is |
|
|
| A browser 3D spacecraft simulator built on Three.js + Vite, with a **zero-dependency TypeScript SDK** that exposes all 8 sim modules for headless use in Node, Deno, Bun, or any bundler. |
|
|
| ```ts |
| import { createState } from './src/sim/state.js'; |
| import { tick } from './src/sim/physics.js'; |
| import { telemetry } from './src/sim/telemetry.js'; |
| |
| const s = createState(); |
| for (let i = 0; i < 6000; i++) tick(s); // 100 simulated seconds |
| console.log(telemetry(s).altitude); // metres above surface |
| ``` |
|
|
| --- |
|
|
| ## Repository |
|
|
| ``` |
| orbital-one/ |
| ├── src/ |
| │ ├── sim/ |
| │ │ ├── state.ts Mission state (vehicle, fuel, orbit elements) |
| │ │ ├── physics.ts Tick-based physics integrator |
| │ │ ├── guidance.ts Ascent + orbital guidance laws |
| │ │ ├── navigation.ts Inertial navigation system |
| │ │ ├── propulsion.ts Engine model (thrust, Isp, staging) |
| │ │ ├── mission.ts Mission sequencer (pre-launch → orbit → coast) |
| │ │ ├── telemetry.ts Telemetry snapshot (altitude, velocity, apoapsis...) |
| │ │ └── math.ts Orbital mechanics primitives (Kepler, RK4) |
| │ ├── render/world.ts Three.js scene (planet, vehicle, trajectory trail) |
| │ ├── ui/ |
| │ │ ├── cockpit.ts Flight deck HUD |
| │ │ └── instruments.ts Instrument panel (altitude tape, velocity, TWR) |
| │ ├── audio.ts Engine audio (Web Audio API) |
| │ ├── input.ts Keyboard + gamepad bindings |
| │ └── main.ts App entry point |
| ├── tests/ |
| │ ├── flight.test.ts Headless physics tests |
| │ ├── browser/flight.spec.ts Playwright end-to-end |
| │ └── profile.ts Performance profile harness |
| └── docs/verification.md Simulation verification notes |
| ``` |
|
|
| --- |
|
|
| ## Sim Modules — SDK Reference |
|
|
| | Module | Export | Description | |
| |---|---|---| |
| | state | `createState()` | Fresh mission state | |
| | physics | `tick(state)` | Advance simulation 1/60 s | |
| | guidance | `guidanceUpdate(state)` | Pitch program + orbit insertion | |
| | navigation | `navUpdate(state)` | Inertial position/velocity | |
| | propulsion | `propulsionTick(state)` | Thrust, Isp, staging events | |
| | mission | `missionSequencer(state)` | Phase transitions | |
| | telemetry | `telemetry(state)` | Snapshot (altitude, velocity, apoapsis, etc.) | |
| | math | `keplerStep`, `rk4` | Orbital mechanics primitives | |
|
|
| All modules are zero-dependency TypeScript. `package.json` exports map wires every entry point. |
|
|
| --- |
|
|
| ## Quick Start |
|
|
| ```sh |
| npm ci && npm run dev # browser app → http://127.0.0.1:5173 |
| npm test # headless physics tests |
| npm run test:browser # Playwright (requires Chrome) |
| npm run build # → dist/ (static, serve over HTTP) |
| ``` |
|
|
| Requires Node.js 22.12+. |
|
|
| --- |
|
|
| ## Stack |
|
|
| | Layer | Tool | |
| |---|---| |
| | 3D rendering | Three.js r180 | |
| | Bundler | Vite 7 | |
| | Language | TypeScript 5.9 | |
| | Tests | Vitest + Playwright | |
| | License | MIT | |
|
|
| --- |
|
|
| ## Related Repos |
|
|
| | Repo | Description | |
| |---|---| |
| | [SNAPKITTYWEST/sov](https://huggingface.co/datasets/SNAPKITTYWEST/sov) | Sovereign Package Switchboard | |
| | [SNAPKITTYWEST/mantra](https://huggingface.co/datasets/SNAPKITTYWEST/mantra) | Deterministic auditable language | |
| | [GitHub](https://github.com/SNAPKITTYWEST/orbital-one) | Source + CI | |
|
|
| --- |
|
|
| ## License |
|
|
| Licensed under **AGPL-3.0**. Full text: [LICENSE](LICENSE). |
|
|
| Releases published before 2026-10-07 were licensed under MIT; copies obtained under those terms keep them. |
|
|
| ### 💼 Commercial License |
|
|
| SnapKitty code is free and open under **AGPL-3.0** for open-source use. Building a commercial product or service? A **proprietary commercial license** from Snapkitty Collective LLC lets you ship this code without the AGPL's source-sharing and network-use obligations. |
|
|
| **[→ Get a commercial license](mailto:A.parr@belespritdaccord.uk?subject=Commercial%20license:%20orbital-one)** · A.parr@belespritdaccord.uk |
|
|
