C Orbit is an orbital simulation written in C, using raylib

Narrated Demo

Features

• Full Keplerian orbital simulation
  • Orbital position is computed by solving for Kepler's universal anomaly & Lagrange Functions (stumpc, stumps)
  • Code available here
  • Elliptical, Parabolic, and Hyperbolic orbits are supported
• Uses rv_to_classical_elements and classical_elements_to_rv to convert between physical states & fully qualified Keplerian orbits
• Orbital lines drawing (example)
• Sphere of influence sphere rendered
• Fully generalized patched conics
• Camera functions to traverse orbital tree (J, K, H, L – basically Vim-style controls)

Upcoming Features

• Full orbital propagation using numerical integration
  • 2-body trajectories (e.g., to the Moon and back)
• Load orbital data from simple text files that define arbitrary hierarchies of bodies and their orbital elements