grav man page

grav — draws a simple orbital simulation

Synopsis

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]

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.

-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.

See Also

X(1), xscreensaver(1), xlock(1)

Author

Greg Bowering <gb@pobox.com>, 1993.

Ability to run standalone or with xscreensaver added by  Jamie Zawinski <jwz@jwz.org>, 10-May-97.

Info

5.36-4.fc26 (10-Feb-2017) X Version 11 XScreenSaver manual