1grav(6x)                      XScreenSaver manual                     grav(6x)
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NAME

6       grav - draws a simple orbital simulation
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SYNOPSIS

9       grav  [-display  host:display.screen]  [-foreground color] [-background
10       color] [-window] [-root] [-mono] [-install] [-visual visual]  [-ncolors
11       integer]  [-delay  microseconds]  [-count integer] [-decay] [-no-decay]
12       [-trail] [-no-trail]
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14       [-fps]
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DESCRIPTION

17       The grav program draws a simple orbital simulation
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OPTIONS

20       grav accepts the following options:
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22       -window Draw on a newly-created window.  This is the default.
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24       -root   Draw on the root window.
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26       -mono   If on a color display, pretend we're on a monochrome display.
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28       -install
29               Install a private colormap for the window.
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31       -visual visual
32               Specify which visual to use.  Legal values are the  name  of  a
33               visual  class,  or the id number (decimal or hex) of a specific
34               visual.
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36       -ncolors integer
37               How many colors should be used (if possible).  Default 64.  The
38               colors are chosen randomly.
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40       -count integer
41               Default 12.
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43       -decay
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45       -no-decay
46               Whether orbits should decay.
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49       -trail
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51       -no-trail
52               Whether  the  objects should leave trails behind them (makes it
53               look vaguely like a cloud-chamber.
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56       -fps    Display the current frame rate and CPU load.
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ENVIRONMENT

59       DISPLAY to get the default host and display number.
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61       XENVIRONMENT
62               to get the name of a resource file that  overrides  the  global
63               resources stored in the RESOURCE_MANAGER property.
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SEE ALSO

66       X(1), xscreensaver(1), xlock(1)
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69       Copyright © 1993 by Greg Bowering.
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71       Permission  to  use, copy, modify, and distribute this software and its
72       documentation for any purpose and without fee is hereby  granted,  pro‐
73       vided  that  the  above  copyright notice appear in all copies and that
74       both that copyright notice and this permission notice  appear  in  sup‐
75       porting documentation.
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AUTHOR

78       Greg Bowering <gb@pobox.com>, 1993.
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80       Ability  to run standalone or with xscreensaver added by Jamie Zawinski
81       <jwz@jwz.org>, 10-May-97.
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85X Version 11               5.42-1.fc29 (30-Dec-2018)                  grav(6x)
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