gravitywell - spaaaaace.

       Jamie Zawinski.

X Version 11                                   6.08 (10-Oct-2023)                                gravitywell(6x)

       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.

       Massive objects distort space in a two dimensional universe.

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.

       gravitywell - spaaaaace.

--visualvisual
               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-idnumber
               Draw on the specified window.

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

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

       --resolutionnumber
               Density of the underlying universe. Default: 1.0.

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

       --countnumber
               Number of stars.  Default: 15.

X(1), xscreensaver(1)

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