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XScreenSaver !!!XScreenSaver NAME SYNOPSIS DESCRIPTION OPTIONS ENVIRONMENT SEE ALSO COPYRIGHT AUTHOR ---- !!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] !!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. !!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 Ability to run standalone or with ''xscreensaver'' added by Jamie Zawinski '' ----
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