Gravity Engine

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.

Complete source code provided.

Developed by a professional programmer with a PhD in astrophysics.

Fixes a handful of bugs (see README for more detail):

- ApplyImpulse() now respects TimeZoom

- fix in orbits initialized with an SGP4 TLE using non-SGP4 propagation