June 3, 2010: Square-Root-of-3 Minibrot | June
2 |
June 4 | 2010 | FOTD Home |
Fractal
visionaries
and enthusiasts:
The parent fractal of today's image was created by iterating the
expression Z^(sqrt(3))+C with the MandelbrotBC3 formula at a level of
12 turns up the complex logarithmic hyperspiral with the 'round'
function applied. This parent consists of a large circular main
bay, with strangely enough, two large period-2 buds, one on the
northwest shore line, the other on the northeast shore, with the whole
thing resembling the head of Mickey Mouse. Today's scene is
located on the western edge of the northwest period-2 bud.
The MandelbrotBC3 formula takes advantage of the multi-valued nature of
the complex logarithm. Unlike the expression Z^2+C, which,
regardless of the value given real(p2), always draws the Mandelbrot
set, an expression such as Z^(sqrt(3))+C has no single fractal
associated with it. It has instead an infinity of different
fractals, every one of which is the result of iterating the expression
Z^(sqrt(3))+C. Asking which fractal is the correct one is
meaningless.
Today's image is named "Square-Root-of-Three Minibrot". The
reason for the name is obvious. The rating of an 8-1/2 might be a
bit liberal, but I did do some extra work on the coloring, and I feel I
deserve the reward.
Lots of sun and lower humidity made Wednesday a rather pleasant day
here at Fractal Central. The fractal cats were up and about most
of the day, getting into various kinds of mischief -- a good sign that
they approved of the drier conditions, if not the higher temperature of
88F 31C.
My day was acceptable, if not great. The next FOTD will be posted
in 24 hours. Until then, take care, and if you're a serf, be
faithful to your lord and master.
Jim Muth
jamth@mindspring.com
jimmuth@aol.com
START PARAMETER FILE=======================================
SqrtThree_Minibrot { ; time=0:01:45.08-SF5 on P4-2000
reset=2004 type=formula formulafile=basicer.frm
formulaname=MandelbrotBC3 function=round passes=1
center-mag=-0.9914563737440867/+0.4862853210787398\
/1.758179e+011/1/-67.5/0 params=1.732051/0/12/0
float=y maxiter=3000 inside=0 logmap=162
periodicity=6 mathtolerance=0.05/1
colors=0004Kp5Kn6Kl6Kj7Kh8Kf8Kd9Jb9I`9HZ9GX9FV9ET9\
DRzzzzzzzzzzzzzzzzzzzzzzhzzUfzGpzwVzs_mpcDh_JaWPVS\
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zzzzzzzzzzzzzzzzzzzzzzzzzzzzz8zd8ze8zf8zg9zh9zi9zj\
9zk9zlAzmAznAzoAzpAzqGzqLzqRzqWzqazqfzqkzqgzrdzr`z\
rYzsVzsRzsOzsLztHztazYjzi }
frm:MandelbrotBC3 { ; by several Fractint users
e=p1, a=imag(p2)+100
p=real(p2)+PI
q=2*PI*fn1(p/(2*PI))
r=real(p2)+PI-q
Z=C=Pixel:
Z=log(Z)
IF(imag(Z)>r)
Z=Z+flip(2*PI)
ENDIF
Z=exp(e*(Z+flip(q)))+C
|Z|<a }
END PARAMETER FILE=========================================