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- comment {
- The fractals in this file were adapted from Peitgen and Richter's "The
- Beauty of Fractals". Since I know little about the Fractint formula compiler,
- and even less about the mathematics behind fractals (in the nine years since
- high school, I have lapsed a bit in my Algebra and Trig: oh, my brain
- hurts!), these attempts at coding formulae were very much trial and error. I
- had to do a lot of "plug it in and try" before I got anything other than a
- blank screen. If anyone cares to improve on these, simplify them, clean them
- up or make them faster, please do. They aren't anything spectacular, they
- just manage to generate some of the maps in "The Beauty of Fractals" that
- I've been wanting to reproduce.
-
- Now if anyone cares to have a go at those Lotka-Volterra Equations, or the
- Boundary Value Problems Discretized on N Points (in 6 dimensions, yet!), the
- gauntlet is down. Have fun.
-
- For any comments, questions, general bafflegab, or if you manage to create
- something really wonderful with these fractals, leave me a note in any of the
- Fractal conferences around, or on Ideal Systems BBS at (508) 757-1806. Alas,
- I can't afford Compuserve.
-
- or...drop me a line:
-
- Peter Jack
- 579 King St. Apt #2
- London, Ontario
- Canada
- N6B 1T4
-
- Enjoy!
- Peter Jack
- }
-
- BOFMaps61-65 {;A variation on Newton's method
- ;Use 0/-0.5 for P1, and Floating Point to create the fractals used for
- ;maps 61 through 65, on pages 90 and 91, in "The Beauty of Fractals".
- z=Pixel:
- z2=z*z;
- z3=z*z*z;
- z4=z*z*z*z;
- z=z-((z4-z3*0.5+z2*0.5-z*0.5-0.5)/((z3*4-z2*1.5+z-.5)+P1)),
- |(z4-z3*0.5+z2*0.5-z*0.5-0.5)| >= 0.00004
- }
-
- BOFMaps75-76 {;A variation on Newton's method
- ;Use 0/0.25 for P1, and Floating Point to create the fractals used for
- ;maps 75 and 76, on pages 114 and 115, in "The Beauty of Fractals".
- z=Pixel:
- z2=z*z;
- z3=z*z*z;
- z=z-((z3-z*.25-1.25)/((z2*3-.25)+P1)),
- |(z3-z*.25-1.25)| >= 0.000001
- }
-
- BOFMaps77-78 {;Another variation on Newton's method
- ;Use 0/0 for P1, and Floating Point to create the fractals used for
- ;maps 77 and 78, on pages 116 nad 117, in "The Beauty of Fractals"
- z=Pixel:
- z2=z*z;
- z3=z*z*z;
- z=z-((z3-z*.5-.5)/((z2*3-.5)+P1)),
- |(z3-z*.5-.5)| >= 0.000000000001
- }
-
-