4 XScreenSaver(1) XScreenSaver(1)
8 julia - draws spinning, animating julia-set fractals
10 S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
11 j
\bju
\bul
\bli
\bia
\ba [-display _
\bh_
\bo_
\bs_
\bt_
\b:_
\bd_
\bi_
\bs_
\bp_
\bl_
\ba_
\by_
\b._
\bs_
\bc_
\br_
\be_
\be_
\bn] [-foreground _
\bc_
\bo_
\bl_
\bo_
\br]
12 [-background _
\bc_
\bo_
\bl_
\bo_
\br] [-window] [-root] [-mono] [-install]
13 [-visual _
\bv_
\bi_
\bs_
\bu_
\ba_
\bl] [-ncolors _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br] [-delay _
\bm_
\bi_
\bc_
\br_
\bo_
\bs_
\be_
\bc_
\bo_
\bn_
\bd_
\bs]
14 [-cycles _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br] [-count _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br] [-mouse] [-nomouse]
17 D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
18 The _
\bj_
\bu_
\bl_
\bi_
\ba program draws spinning, animating julia-set
21 It uses ifs {w0 = sqrt(x-c), w1 = -sqrt(x-c)} with random
22 iteration to plot the julia set, and sinusoidially varied
23 parameters for the set, and plots parameters with a cir-
26 One thing to note is that count is the _
\bd_
\be_
\bp_
\bt_
\bh of the search
27 tree, so the number of points computed is (2^count)-1. I
28 use 8 or 9 on a dx266 and it looks okay. The sinusoidal
29 variation of the parameter might not be as interesting as
30 it could, but it still gives an idea of the effect of the
34 O
\bOP
\bPT
\bTI
\bIO
\bON
\bNS
\bS
35 _
\bj_
\bu_
\bl_
\bi_
\ba accepts the following options:
37 -
\b-w
\bwi
\bin
\bnd
\bdo
\bow
\bw Draw on a newly-created window. This is the
40 -
\b-r
\bro
\boo
\bot
\bt Draw on the root window.
42 -
\b-m
\bmo
\bon
\bno
\bo If on a color display, pretend we're on a
45 -
\b-i
\bin
\bns
\bst
\bta
\bal
\bll
\bl
46 Install a private colormap for the window.
48 -
\b-v
\bvi
\bis
\bsu
\bua
\bal
\bl _
\bv_
\bi_
\bs_
\bu_
\ba_
\bl
49 Specify which visual to use. Legal values are the
50 name of a visual class, or the id number (decimal
51 or hex) of a specific visual.
53 -
\b-n
\bnc
\bco
\bol
\blo
\bor
\brs
\bs _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br
54 How many colors should be used (if possible).
55 Default 200. The colors used cycle through the
56 hue, making N stops around the color wheel.
58 -
\b-c
\bcy
\byc
\bcl
\ble
\bes
\bs _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br
64 X Version 11 28-May-97 1
70 XScreenSaver(1) XScreenSaver(1)
73 -
\b-c
\bco
\bou
\bun
\bnt
\bt _
\bi_
\bn_
\bt_
\be_
\bg_
\be_
\br
76 -
\b-m
\bmo
\bou
\bus
\bse
\be
78 -
\b-n
\bno
\bom
\bmo
\bou
\bus
\bse
\be
79 If _
\b-_
\bm_
\bo_
\bu_
\bs_
\be is specified, the control point of the
80 Julia set will be derived from the position of the
81 mouse in the window. When the mouse is not in the
82 window, the control point is chosen the normal
85 E
\bEN
\bNV
\bVI
\bIR
\bRO
\bON
\bNM
\bME
\bEN
\bNT
\bT
86 D
\bDI
\bIS
\bSP
\bPL
\bLA
\bAY
\bY to get the default host and display number.
88 X
\bXE
\bEN
\bNV
\bVI
\bIR
\bRO
\bON
\bNM
\bME
\bEN
\bNT
\bT
89 to get the name of a resource file that overrides
90 the global resources stored in the RESOURCE_MAN-
93 S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
94 X
\bX(1), x
\bxs
\bsc
\bcr
\bre
\bee
\ben
\bns
\bsa
\bav
\bve
\ber
\br(1), x
\bxl
\blo
\boc
\bck
\bk(1)
96 C
\bCO
\bOP
\bPY
\bYR
\bRI
\bIG
\bGH
\bHT
\bT
97 Copyright (C) 1995 by Sean McCullough.
99 Permission to use, copy, modify, and distribute this soft-
100 ware and its documentation for any purpose and without fee
101 is hereby granted, provided that the above copyright
102 notice appear in all copies and that both that copyright
103 notice and this permission notice appear in supporting
106 A
\bAU
\bUT
\bTH
\bHO
\bOR
\bR
107 Sean McCullough <bankshot@mailhost.nmt.edu>, 1995.
109 Ability to run standalone or with _
\bx_
\bs_
\bc_
\br_
\be_
\be_
\bn_
\bs_
\ba_
\bv_
\be_
\br added by
110 Jamie Zawinski <jwz@netscape.com>, 10-May-97.
130 X Version 11 28-May-97 2