Fractal visionaries and enthusiasts:

Today's image is named "Half an Explosion".  I gave it this name for two reasons: first, because the explosion is divided into two distinct halves; second, because it is a tweaking of an image that appeared several years ago, and is therefore only half new.

The parent fractal is an oversized thing consisting of two large bays with a large ring off to the northeast.  This ring is surrounded by smaller rings, with today's scene located in one of these smaller rings.

The half-and-half effect was created by carefully tweaking the escape radius, set by imag(p3), until the cutoff point slices through the center of the minibrot.  The effect in the left half of the image was created by rendering the scene with the inside set to 'atan'; the right half consists of normal equal-iteration outside stuff.

I rated the image at an 8 even though it is kind of a repeat.  In my opinion, its half-and-half effect justifies such a rating.  (I sometimes return to past images to see what I can find new in them.)

The calculation time of 55 seconds is blazingly fast.  And even the slight annoyance of setting up and running the parameter file may be avoided by viewing the finished image on the FOTD web sites.

The first day of March here at Fractal Central began with fog and heavy clouds.  The fog thinned and the sky brightened as the day progressed, but the clouds hung on and the conditions never reached what could be called pleasant, despite the temperature of 48F +9C, which was mild for the season.  Early in the day the fractal cats gave up waiting for the sun, and spent the rest of the time snuggled in the warmest places they could find.

The humans had a normal dull day, (which does not mean boring).  The next FOTD will be posted in 24 hours.  Until then, take care, and how can we consider the visible material universe to be any kind of ultimate reality when all we know of it is inferred from images created in our minds -- images that we now know reflect only about five percent of all that exists.

Jim Muth
jimmuth@earthlink.net


START PARAMETER FILE=======================================

Half_an_Explosion  { ; time=0:00:55.00 SF5 at 2000MHZ
  reset=2004 type=formula formulafile=basicer.frm
  formulaname=MandAutoCritInZ function=recip passes=1
  center-mag=+9.910072784924/+5.580966722132/1249903\
  /1/-20/0 params=-4/-1.6/-0.8/-7.7/0/1.166686e+016
  float=y maxiter=1000 inside=atan periodicity=10
  colors=000btTgvOmxJrzEpwQnt`lqkjovklrlinmgjndfobcn\
  camd_keZjfXigVhhTfiSejQdkOclNeiWggcidljbth_rfYqdWo\
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  1lQ1nL1pG1rB1qAEpARo9co9pjCofEnaGmYJmTLlPNkLPkMTdN\
  WZO_SObMPfFQi9Ql3ZpDftNnwXko`hgde_hbSl_KpXDtbKmgQf\
  mW_raTfh_WofLvmOjnQZoSNpUBqW0r`sRakWbc_cXccPhdIleA\
  pe3tVIsKXsAjsGlmMnhRpcXrZ }

frm:MandAutoCritInZ {; Jim Muth
a=real(p1), b=imag(p1), d=real(p2), f=imag(p2),
g=1/f, h=1/d, j=1/(f-b), z=(((-a*b*g*h)^j)+(p4)),
k=real(p3)+1, l=imag(p3)+100, c=fn1(pixel):
z=k*((a*(z^b))+(d*(z^f)))+c,
|z| < l }

END PARAMETER FILE=========================================