Provided by:
xscreensaver-data-extra_5.08-0ubuntu3_i386 
NAME
halftone - simple halftone pattern of moving mass points
SYNOPSIS
halftone [-display host:display.screen] [-visual visual] [-window]
[-root] [-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.
-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 spac-
ing 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 num-
ber 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.
X(1), xscreensaver(1)
COPYRIGHT
Copyright (C) 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 copy-
right notice appear in all copies and that both that copyright notice
and this permission notice appear in supporting documentation. No rep-
resentations are made about the suitability of this software for any
purpose. It is provided "as is" without express or implied warranty.
AUTHOR
Peter Jaric