XScreenSaver(1) XScreenSaver(1) NNAAMMEE julia - draws spinning, animating julia-set fractals SSYYNNOOPPSSIISS jjuulliiaa [-display _h_o_s_t_:_d_i_s_p_l_a_y_._s_c_r_e_e_n] [-foreground _c_o_l_o_r] [-background _c_o_l_o_r] [-window] [-root] [-mono] [-install] [-visual _v_i_s_u_a_l] [-ncolors _i_n_t_e_g_e_r] [-delay _m_i_c_r_o_s_e_c_o_n_d_s] [-cycles _i_n_t_e_g_e_r] [-count _i_n_t_e_g_e_r] [-mouse] [-nomouse] DDEESSCCRRIIPPTTIIOONN The _j_u_l_i_a 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 cir- cle. One thing to note is that count is the _d_e_p_t_h 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. OOPPTTIIOONNSS _j_u_l_i_a accepts the following options: --wwiinnddooww Draw on a newly-created window. This is the default. --rroooott Draw on the root window. --mmoonnoo If on a color display, pretend we're on a monochrome display. --iinnssttaallll Install a private colormap for the window. --vviissuuaall _v_i_s_u_a_l 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. --nnccoolloorrss _i_n_t_e_g_e_r How many colors should be used (if possible). Default 200. The colors used cycle through the hue, making N stops around the color wheel. --ccyycclleess _i_n_t_e_g_e_r X Version 11 28-May-97 1 XScreenSaver(1) XScreenSaver(1) --ccoouunntt _i_n_t_e_g_e_r --mmoouussee --nnoommoouussee If _-_m_o_u_s_e 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. EENNVVIIRROONNMMEENNTT DDIISSPPLLAAYY to get the default host and display number. XXEENNVVIIRROONNMMEENNTT to get the name of a resource file that overrides the global resources stored in the RESOURCE_MAN- AGER property. SSEEEE AALLSSOO XX(1), xxssccrreeeennssaavveerr(1), xxlloocckk(1) CCOOPPYYRRIIGGHHTT Copyright (C) 1995 by Sean McCullough. Permission to use, copy, modify, and distribute this soft- ware 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. AAUUTTHHOORR Sean McCullough , 1995. Ability to run standalone or with _x_s_c_r_e_e_n_s_a_v_e_r added by Jamie Zawinski , 10-May-97. X Version 11 28-May-97 2