NAME

       gravitywell - spaaaaace.

SYNOPSIS

       gravitywell   [--display   host:display.screen]   [--visual  visual]  [--window]  [--root]
       [--window-id number] [--delay number] [--speed number] [--resolution number]  [--grid-size
       number] [--count number]

DESCRIPTION

       Massive objects distort space in a two dimensional universe.

OPTIONS

       --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.

       --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.

       --delay number
               Per-frame delay, in microseconds.  Default: 30000 (0.03 seconds).

       --speed number
               Animation speed. 2.0 means twice as fast, 0.5 means half as fast.

       --resolution number
               Density of the underlying universe. Default: 1.0.

       --grid-size number
               Grid Size. Smaller values are more dense. Default: 1.0.

       --count number
               Number of stars.  Default: 15.

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)

COPYRIGHT

       Copyright © 2019 by Jamie Zawinski.  Permission to use, copy, modify, distribute, and sell
       this software and its documentation  for  any  purpose  is  hereby  granted  without  fee,
       provided that the above copyright notice appear in all copies and that both that copyright
       notice and this permission notice appear in supporting documentation.  No  representations
       are  made  about the suitability of this software for any purpose.  It is provided "as is"
       without express or implied warranty.

AUTHOR

       Jamie Zawinski.