Gravit

Gravit
	Gravit screenshot
Developer(s)	Gerald Kaszuba
Initial release	2005; 17 years ago
Stable release	0.5.0 (May 5, 2012; 9 years ago)
Repository	github.com/gak/gravit ;
Written in	C
Operating system	Cross-platform
Available in	English
Type	Educational software
License	GPL
Website	gravit.slowchop.com

Gravit^[1] is a free and open-source gravity simulator distributed under the GNU General Public License. The program is available for all major operating systems, including Linux and other Unix-like systems, Microsoft Windows and Mac OS X.

Gravit uses the Barnes–Hut algorithm to simulate the n-body problem.

Description[]

Gravit is a gravity simulator which runs under Linux, Windows and Mac OS X. It is released under the GNU General Public License which makes it free. It uses Newtonian physics using the Barnes-Hut N-body algorithm. Although the main goal of Gravit is to be as accurate as possible, it also creates beautiful looking gravity patterns. It records the history of each particle so it can animate and display a path of its travels. At any stage you can rotate your view in 3D and zoom in and out. Gravit uses OpenGL with Lua, SDL, SDL_ttf and SDL_image.

Features

View the simulation in 3D, optionally using stereoscopic imaging
Can be installed as a screen saver in Windows
Record a simulation, then play back at any speed
Load / Save a recorded simulation
Mouse controllable rotation
Console with script execution
See an octtree being created in real-time
Colours can be based on mass, velocity, acceleration, momentum or kinetic energy
Initial particle locations are scriptable (Lua)