NAME

       halftone - simple halftone pattern of moving mass points

SYNOPSIS

       halftone  [--display  host:display.screen]  [--visual  visual]  [--window]  [--root] [--window-id number]
       [--count number] [--spacing number] [--sizefactor number] [--delay number] [--minmass number]  [--maxmass
       number] [--minspeed number] [--maxspeed number] [--fps]

DESCRIPTION

       Draws  the  gravity  force  in  each point on the screen seen through a halftone dot pattern. The gravity
       force is calculated from a set of moving mass points. View it from a distance for best effect.

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.

       --count number
               How many mass points to move around. Default: 10

       --spacing number
               Distance between each halftone dot. Default: 14

       --sizefactor number
               How big each halftone dot should be drawn compared to the spacing value. Default: 1.5

       --minmass number
               The minimum mass of each mass point. Default: 0.001

       --maxmass number
               The maximum mass of each mass point. Default: 0.02

       --minspeed number
               The minimum speed of each mass point. Default: 0.001

       --maxspeed number
               The  maximum  speed  of  each  mass  point.  Default:  0.02  --delay  number  Per-frame delay, in
               microseconds.  Default: 10000

       --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)

COPYRIGHT

       Copyright  © 2002 by Peter Jaric. 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

       Peter Jaric