1grav(6x) XScreenSaver manual grav(6x)
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6 grav - draws a simple orbital simulation
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9 grav [--display host:display.screen] [--foreground color] [--background
10 color] [--window] [--root] [--window-id number][--mono] [--install]
11 [--visual visual] [--ncolors integer] [--delay microseconds] [--count
12 integer] [--decay] [--no-decay] [--trail] [--no-trail]
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14 [--fps]
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17 The grav program draws a simple orbital simulation
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20 grav accepts the following options:
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22 --window
23 Draw on a newly-created window. This is the default.
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25 --root Draw on the root window.
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27 --window-id number
28 Draw on the specified window.
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30 --mono If on a color display, pretend we're on a monochrome display.
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32 --install
33 Install a private colormap for the window.
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35 --visual visual
36 Specify which visual to use. Legal values are the name of a
37 visual class, or the id number (decimal or hex) of a specific
38 visual.
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40 --ncolors integer
41 How many colors should be used (if possible). Default 64. The
42 colors are chosen randomly.
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44 --count integer
45 Default 12.
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47 --decay
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49 --no-decay
50 Whether orbits should decay.
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53 --trail
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55 --no-trail
56 Whether the objects should leave trails behind them (makes it
57 look vaguely like a cloud-chamber.
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60 --fps Display the current frame rate and CPU load.
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63 DISPLAY to get the default host and display number.
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65 XENVIRONMENT
66 to get the name of a resource file that overrides the global
67 resources stored in the RESOURCE_MANAGER property.
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69 XSCREENSAVER_WINDOW
70 The window ID to use with --root.
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73 X(1), xscreensaver(1), xlock(1)
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76 Copyright © 1993 by Greg Bowering.
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78 Permission to use, copy, modify, and distribute this software and its
79 documentation for any purpose and without fee is hereby granted, pro‐
80 vided that the above copyright notice appear in all copies and that
81 both that copyright notice and this permission notice appear in sup‐
82 porting documentation.
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85 Greg Bowering <gb@pobox.com>, 1993.
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87 Ability to run standalone or with xscreensaver added by Jamie Zawinski
88 <jwz@jwz.org>, 10-May-97.
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92X Version 11 6.08-1.fc39 (17-Oct-2023) grav(6x)