Dr. J brought home a new picture to hang in the hall. He has named it Bridge To... because, well, it reminds him of a bridge from the past which is solid and fairly well known to the future which is mostly unknown. Of course, only the near past and the near future are shown. And while more distant views are possible, it requires more iterations and more digital resources than even Dr. J has. Oh well.
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Figure 1. Bridge To ....
Tonight's picture uses the cubic formula by Lee Skinner (from the Fractint.frm file).
Stay connected,
Jay
The parameter and formula files for Fractint are included below. Copy them
into a quickie.par file for quick loading into Fractint. For longer term
use, copy the frm: block into a FotN.frm file. But this time leave off the
'frm:' part. Then copy the rest (the par parts) into your FotN.par
file.
PastToFuture { ; (c) Jay Hill, 1998
reset=1960 type=formula formulafile=fractint.frm
formulaname=cubic
center-mag=0.435558/0.31089/0.4806415/1/-119.999 params=50/0
maxiter=255 inside=bof60
invert=1/0.605682/0.579512
colors=00U<11>Kcw<2>mmK<9>KwA<17>cK0\
<12>0z0<15>0w0GXd<178>000KwU221000
savename=Bridge2
}
Cubic (XYAXIS) {; Lee Skinner
p = pixel, test = p1 + 3
t3 = 3*p, t2 = p*p
a = (t2 + 1)/t3, b = 2*a*a*a + (t2 - 2)/t3
aa3 = a*a*3, z = 0 - a :
z = z*z*z - aa3*z + b
|z| < test
}
