Grav

Grav models the motion of objects in a simple gravity well.

Grav is available as:

• a DHTML/JavaScript1.2 page (tested in IE6 and NS6)
• a mode in the xlockmore screen locking program for Unix
• a mode in the xscreensaver screen saving and locking program for Unix
• a standalone linux app (see man page at linuxcommand.org)
• a screensaver for Windows

Grav was written by Greg Bowering in 1992, with modifications in 1993, and 1994 for the xlockmore screen locking program.

The Windows port was done in 1999 using the SCRplus screensaver API.