bionic (6) julia.6x.gz

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]

       [-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.

       Dragging the mouse in the window uses the mouse's position as the control point for the generation of ths
       set.

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

       -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.