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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DESCRIPTION

16       The grav program draws a simple orbital simulation
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OPTIONS

19       grav accepts the following options:
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21       -window Draw on a newly-created window.  This is the default.
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23       -root   Draw on the root window.
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25       -mono   If on a color display, pretend we're on a monochrome display.
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27       -install
28               Install a private colormap for the window.
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30       -visual visual
31               Specify which visual to use.  Legal values are the  name  of  a
32               visual  class,  or the id number (decimal or hex) of a specific
33               visual.
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35       -ncolors integer
36               How many colors should be used (if possible).  Default 64.  The
37               colors are chosen randomly.
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39       -count integer
40               Default 12.
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42       -decay
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44       -no-decay
45               Whether orbits should decay.
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48       -trail
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50       -no-trail
51               Whether  the  objects should leave trails behind them (makes it
52               look vaguely like a cloud-chamber.
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ENVIRONMENT

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

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

75       Greg Bowering <gb@pobox.com>, 1993.
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77       Ability  to run standalone or with xscreensaver added by Jamie Zawinski
78       <jwz@jwz.org>, 10-May-97.
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82X Version 11                 5.05-3 (06-Apr-2008)                     grav(6x)
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