May 29, 1997: Brot in a Spot | May 28 | May 30 | 1997 | FOTD Home |
Fractal
visionaries:
Today's formula is a really strange one. One minute it's
drawing the classic Mandelbrot set, the next minute it's drawing a
screen full of flying fragments. I devised the formula in
an effort to eliminate the break along the negative
x-axis that appears when complex or imaginary powers are
calculated. I
got a lot more than I bargained for.
I figured that since positive and negative imaginary powers draw
fractals that spiral around the origin in opposite directions, if an
expression something like (Z^2i)^(Z^(-2i)) were calculated, the
opposite signs would cancel the spiraling out, leaving a fractal with
the features of an imaginary exponent without the
discontinuity along the x-axis.
It worked beautifully. Today's fractal, ringwrld, shows a
somewhat distorted but still recognizable Mandelbrot set surrounded by
rings introduced by the imag(1) assigned p3, which is calculated in the
formula as both positive and negative.
The formula is full of other surprises. It's one of the most
bizarre and unpredictable formulas in my collection, but despite its
versatility, it still runs fast. So don't hesitate to change
the parameters and see what surprises you can turn up.
Jim Muth
jamth@mindspring.com
START PARAMETER-FORMULA FILE FOR 19.6==============================
Brot_in_a_Spot { ;
time=0:00:04.94-SF5 on P4-2000
reset=1960 type=formula formulafile=basicer.frm
formulaname=Mytest06 center-mag=-0.729122/0/0.4411
params=1/0/0.5/0/0/1 float=y bailout=100 inside=253
logmap=yes symmetry=xaxis periodicity=10
colors=000OMJUOG_PDeRBkS8qU5wV2wY4w_6wb8xe9xhBxjDx\
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VdxPfwKiwElw8ow200LMWCOSF }
frm:Mytest06 {; Jim Muth
z=c=pixel:
z=(((z^p1)*(z+p2))^p3)^(-p3)+c,
|z|<100 }
END PARAMETER-FORMULA FILE FOR 19.6================================