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Julia_Set
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1996-10-09
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919b
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Julia Set
---------
Plots the Julia set corresponding to the equivalent Mandelbrot function.
The initial zoom uses integer maths, then reverts to to a rather slower
floating point. From the menu you can switch to the equivalent Mandelbrot -
the current Real and Imaginary values are used to set the Mandelbrot x & y
value for the centre of the image. Other options are as described under
Mandelbrot.
It is usually best to select a Julia from the equivalent Mandelbrot display.
Trying to set cReal and cImaginary otherwise can be a slow process to get
reasonable results. When switching to the Quaternion set, Quaternion q0 is
set to cReal & q2 to cImaginary.
When using functions other than Square, floating point is used much sooner
so as to maintain accuracy.
Algorithm: the Julia algorithm is essentially the same as for Mandelbrot,
but with a different start point, namely:
u=x
v=y
x=cReal
y=cImaginary