;     Date: Wed, 22 Oct 2003 09:00:21 -0400
;     From: Jim Muth <jamth@mindspring.com>
;  Subject: [Fractint] FOTD 03-10-97 (Cirrus)
;       Id: <1.5.4.16.20031022090126.0fcf6e3c@pop.mindspring.com>
; ---------
; 
; NOTE: This image has been changed from the original version.
; 
; =====================================================
; 
; CLASSIC F.O.T.D., October 03, 1997 (Cirrus)
; 
; Fractal visionaries:
; 
; Today's unusual fractal is a view of the sky -- nothing solid, 
; just vapor and ice crystals.  I was undecided whether to name it 
; "Cirrus" or "Skyscape".  I finally decided on "Cirrus", but I 
; could just as easily have given it the other name.
; 
; There may still be some who doubt that clouds are one of 
; nature's fractals.  If so, today's picture should end that 
; doubt.  It is a photograph taken from a window of F.C., showing 
; a clear blue sky filled with cirrus streamers.  Well, actually 
; it's not a photograph at all, but rather a scene in the Z^2+C 
; Julibrot, sliced in the oblate direction, in the area of the 
; second valley beyond Seahorse valley, the one at -1.368 on the 
; X-axis.
; 
; One of my fractal projects is to collect fractal representations 
; of all the cloud types.  I have had several fine cumulonimbus 
; cloud fractals for quite some time, but today's cirrus fractal 
; is my best cirrus scene to date.  That leaves nimbus and stratus 
; fractals yet to be found.  And of course I'll also want all the 
; combination clouds, such as cirro-cumulus and alto-cumulus, etc.
; 
; The formula draws the oblate slices of the Julibrot, which I 
; define as the slices determined by the Mandelbrot Y-axis and the 
; Julia X-axis.  The VB in the formula name stands for Variable 
; Bailout.  I recently discovered that a very low bailout radius 
; does strange things in some of the odd planes, particularly in 
; that area known as Seahorse Valley, so I altered my formulas to 
; add an easily changed bailout feature.
; 
; BTW, I wonder what happened to Elephant Valley at the east end 
; of the Mandelbrot set.  It has some very good fractal scenes 
; also, and one almost never hears about it.  Maybe elephants are 
; simply too clumsy to be associated with fractals.  :-)
; 
; Whatever the case, today's picture of the cirrus clouds has been 
; posted to:
; 
;         http://home.att.net/~Paul.N.Lee/FotD/FotD.html
; 
; Until tomorrow then, keep looking up.  You might see a UFO; you 
; might see a fractal!
; 
; 
; Jim Muth
; jamth@mindspring.com
; jimmuth@aol.com
; 
; 
; START PARAMETER FILE=============================================

cirrus { ; 2 minutes at 200mhz, 640x480
  reset=1960 type=formula formulafile=cirrus.par
  formulaname=OblateVB passes=1 center-mag=-1.584890\
  27912513300/+0.01512015871562687/137.8441/1.9206/\
  -4.818/3.522 params=0/-1.36818/6/0 float=y
  maxiter=200000 bailout=100 logmap=yes periodicity=10
  colors=000e1Te1Te1Tf1Uf1Uf1Uf1Uf1Vg1Vg1Vg1Vg1Wg1Wh\
  1Wh1Wh1Wh1Xh1Xh1Xi1Xi1Yi1Yi1Yi1Yj1Zj1Zj1Zj1Zk0Yj0Z\
  j0_i0_h1`h1ag1bg1bf1ce1de1ed2ec2fc2gb2ha2ha2iZ2jW3\
  mT3rQ3wN3zK3zK3zK3zK3zK4zK4zK4zL4zM4zN4zO4zP5zQ5zQ\
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  PGyQHyQHyQIxQJxQKxQLxRMxRMxRNxROxRPxRQxSRxSRwSSwST\
  wSUwSVwTWwTWwTXwTYwTZwT_wU`vU`vUavUbvUcvUdvVevVevV\
  fvVgvVhvViuWjuWjuWkuWluWmuWnuXouXouXpuXquXrtYstZtt\
  _tt`utavtbwtcxudxueytfztgzshzsizrjzrkzqlzqmzrnzsoz\
  tpzuqzvrzwszxtzyuzzvzzwzzxzzyzzzzzzzzzzzzzzzzzzzzz\
  zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz\
  zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzlXVlWUlWUlVTmVTmU\
  SmUSmTRnTRnSRnSQoRQoRPoQPoQOpPOpPNpONpOMqNMqNLqMLr\
  MKrLKrLJrKJsKIsJIsJHsIHtIGtHGtGGuFHtGG`2N`2N`2Na2O\
  a2Oa2Oa2Oa2Pa2Pb2Pb2Pb2Pb2Qb2Qc2Qc1Qc1Qc1Rc1Rc1Rd1\
  Rd1Sd1Sd1Sd1Sd1Se1Te1Te1T }

frm:OblateVB {; Jim Muth
z=real(pixel)+flip(real(p1)),
c=flip(imag(pixel))+imag(p1),
a=sqr(p2):
z=sqr(z)+c,
|z| <= a }

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