NAME

       Eruption - eruption of pieces of hot volcanic rock

SYNOPSIS

       Eruption  [-display  host:display.screen]  [-visual  visual]  [-window]  [-root] [-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.  Ported from the demo
       effects collection (http://demo-effects.sourceforge.net)

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.

       -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.

SEE ALSO

       X(1), xscreensaver(1)

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