Gravity Engine v13.1 - Free Download

Consider Gravity Engine 2 (by the same author) for new projects. Comparision (Gravity Engine is actively supported) Gravity Engine provides a complete toolkit for your space game physics. - add stars, planets and spaceships that interact via gravitational N-body or "on-rails" - design orbits by shape and see their paths in the editor and scene - manual orbit changes with clickable handles - orbit transfers/rendezvous from any orbit to any orbit - rocket engines with staging - model of Earth atmosphere - solar system builder: add any object in the JPL database - use real-world units (km/AU, kg) - full support for particles - highly accurate double-precision physics, with a choice of algorithm/Kepler evolution - control of overall evolution speed, scale and CPU use In-scene extensible command line console for development and debug - change gravity to any force you design No programming or math required. Release Notes and Docs Complete source code provided. Developed by a professional programmer with a PhD in astrophysics.