NAME

       julia - draws spinning, animating julia-set fractals

SYNOPSIS

       julia  [-display  host:display.screen]  [-foreground  color] [-background color] [-window]
       [-root] [-mono] [-install]  [-visual  visual]  [-ncolors  integer]  [-delay  microseconds]
       [-cycles integer] [-count integer] [-mouse] [-nomouse]

       [-fps]

DESCRIPTION

       The julia program draws spinning, animating julia-set fractals.

       It uses ifs {w0 = sqrt(x-c), w1 = -sqrt(x-c)} with random iteration to plot the julia set,
       and sinusoidially varied parameters for the set, and plots parameters with a circle.

       One thing to note is that count is the depth of the search tree, so the number  of  points
       computed  is  (2^count)-1.   I  use  8  or 9 on a dx266 and it looks okay.  The sinusoidal
       variation of the parameter might not be as interesting as it could, but it still gives  an
       idea of the effect of the parameter.

OPTIONS

       julia accepts the following options:

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -mono   If on a color display, pretend we're on a monochrome display.

       -install
               Install a private colormap for the window.

       -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.

       -ncolors integer
               How many colors should be used (if possible).  Default 200.  The colors used cycle
               through the hue, making N stops around the color wheel.

       -cycles integer

       -count integer

       -mouse

       -nomouse
               If  -mouse  is  specified, the control point of the Julia set will be derived from
               the position of the mouse in the window.  When the mouse is not in the window, the
               control point is chosen the normal way.

       -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), xlock(1)

COPYRIGHT

       Copyright © 1995 by Sean McCullough.

       Permission to use, copy, modify, and distribute this software and  its  documentation  for
       any  purpose  and  without fee is hereby granted, provided that the above copyright notice
       appear in all copies and that both that copyright notice and this permission notice appear
       in supporting documentation.

AUTHOR

       Sean McCullough <bankshot@mailhost.nmt.edu>, 1995.

       Ability  to  run  standalone  or  with xscreensaver added by Jamie Zawinski <jwz@jwz.org>,
       10-May-97.