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.

X Version 11                                   5.15 (28-Sep-2011)                                      julia(6x)