Provided by: xscreensaver-data-extra_5.34-2ubuntu1_amd64
grav - draws a simple orbital simulation
grav [-display host:display.screen] [-foreground color] [-background color] [-window] [-root] [-mono] [-install] [-visual visual] [-ncolors integer] [-delay microseconds] [-count integer] [-decay] [-no-decay] [-trail] [-no-trail] [-fps]
The grav program draws a simple orbital simulation
grav accepts the following options: -window Draw on a newly-created window. This is the default. -root Draw on the root window. -mono If on a color display, pretend we're on a monochrome display. -install Install a private colormap for the window. -visual visual Specify which visual to use. Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual. -ncolors integer How many colors should be used (if possible). Default 64. The colors are chosen randomly. -count integer Default 12. -decay -no-decay Whether orbits should decay. -trail -no-trail Whether the objects should leave trails behind them (makes it look vaguely like a cloud-chamber. -fps Display the current frame rate and CPU load.
DISPLAY to get the default host and display number. XENVIRONMENT to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.
X(1), xscreensaver(1), xlock(1)
Copyright © 1993 by Greg Bowering. Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.
Greg Bowering <email@example.com>, 1993. Ability to run standalone or with xscreensaver added by Jamie Zawinski <firstname.lastname@example.org>, 10-May-97.