NAME

       Eruption - eruption of pieces of hot volcanic rock

SYNOPSIS

       Eruption   [--display   host:display.screen]   [--visual   visual]   [--window]   [--root]
       [--window-id number] [--ncolors number] [--nParticles  number]  [-Heat  number]  [-Cooling
       number] [-Gravity number] [--delay number] [--cycles number] [--fps]

DESCRIPTION

       This hack creates an eruption of pieces of hot volcanic rock.

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.

       --ncolors number
               Number of Colors.  Default: 256.

       --particles number
               Number of Particles. Default: 300.

       --cooloff number
               Eruption Cooloff. Default: 2.

       --heat number
               Heat of Eruption. Default: 256.

       --gravity number
               Gravity. Default: 1.

       --delay number
               Per-frame delay, in microseconds.  Default: 5000 (0.01 seconds.).

       --cycles number
               Duration.  10 - 3000.  Default: 80.

       --fps   Display the current frame rate and CPU load.

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),
       https://demo-effects.sourceforge.net/

COPYRIGHT

       Copyright  ©  2002-2003 by W.P. van Paassen.  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

       W.P. van Paassen