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øFm4_129_Distort
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1990-12-16
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----------------------------------- Distort ----------------------------------
Distort, one of the standard EDPs for Fractal Wizard, is a modified version of
MBFast. If you do not know what MBFast does, read its Help first.
With Distort, you draw distorted Mandelbrot sets. The normal iteration is slightly
modified. The iteration used to compute the Mandelbrot set is:
z[n]:= z[n-1]^2 + c, where z = x+iy and c = a+ib.
In real numbers, the iteration looks like this:
x[n]:= x[n-1]^2 - y[n-1]^2 + a
y[n]:= 2*x[n-1]*y[n-1] + b
In Distort, the equation for y is modified:
y[n]:= 2*D*x[n-1]*y[n-1] + b
If D = 1, this still yields the Mandelbrot set. For other values╔ well, try it yourself!