Symplectica

Symplectica is a high-fidelity, multiplayer, N-body space simulator focused on scientific accuracy. Built with Rust + WebAssembly, TypeScript, Three.js, and Node.js. Currently in early development phases.

Key Features

• N-body gravity with Pairwise, Barnes–Hut and FMM solvers.
• Hybrid integrator switching in close encounters:
  • Default integrator: Symplectic Velocity Verlet
  • Close-encounter: Adaptive RK45 or 5th-Order Gauss-Radau
• True distances and sizes with optional visualization-only size scaling.
• Multiplayer universe builder with real-time system editing.
• Deterministic seed-based procedural starfields and terrain.
• Physics-based atmospheres and relativistic visual phenomena.

See FEATURES.md for a comprehensive list of implemented, in progress, and planned features.

Installation & Setup

Prerequisites

• Node.js 18+
• Rust 1.70+
• wasm-pack

Development

1. Clone and install:

   git clone https://github.com/ali-albdaer/Symplectica.git
   cd Symplectica
   npm install  # Also builds wasm

2. Start development:

   npm run dev

3. Build for production:

   npm run build

Sources

All sources I used while researching physics, numerical methods, and simulation design will be listed in SOURCES.md.

License

Symplectica is licensed under the MIT LICENSE.