grav(6) XScreenSaver manual grav(6)
NAME
grav - draws a simple orbital simulation
SYNOPSIS
grav [--display
host:display.screen] [--foreground
color]
[--background
color] [--window] [--root] [--window-id
number][--mono]
[--install] [--visual
visual] [--ncolors
integer] [--delay
microseconds] [--count
integer] [--decay] [--no-decay] [--trail]
[--no-trail]
[--fps]
DESCRIPTION
The
grav program draws a simple orbital simulation
OPTIONS
grav accepts the following options:
--window Draw on a newly-created window. This is the default.
--root Draw on the root window.
--window-id number Draw on the specified 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.
ENVIRONMENT
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.
XSCREENSAVER_WINDOW The window ID to use with
--root.
SEE ALSO
X(1),
xscreensaver(1),
xlock(1)COPYRIGHT
Copyright (C) 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.
AUTHOR
Greg Bowering <gb@pobox.com>, 1993.
Ability to run standalone or with
xscreensaver added by Jamie
Zawinski <jwz@jwz.org>, 10-May-97.
X Version 11 6.09 (07-Jun-2024) grav(6)
