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James Hayes : Digital Multimedia Work

*NEW* I have made some improvements to the Mira fractal, using finer points to draw the image, allowing the window to be maximized, including a simple explanation of the equation, & colour scheme changes. If you have any recommendations for changes, please do not hesitate to make them via the contact form.

Explanation Below || Run the Fractal!

Martin's Mappings (Hopalong)
Barry Martin from Aston University (Birmingham/England) discovered a new variety of strange attractors in the mid-80's. He called them Martin's mappings. A. K. Dewdney presented Martin's first images and the algorithm in his Computer Recreations column in Scientific American (Sept.1986). Dewdney called Martin's new attractor Hopalong, referring to the unique way it grows on the computer screen: the pixels hop from one point to another. Hopalongs don't slowly grow line by line as the popular Mandelbrot fractals do but rather emerge from the whole of the screen at once, getting more and more detailed. They usually grow endlessly into all directions, showing surprising details and structures, often reminiscent of organic structures or oriental rugs.

Gumowski/Mira
CERN physicists Gumowski and Mira found an equally interesting attractor, usually referred to as Mira fractal. Gumowski/Mira type attractors show a somewhat Hopalong-like behaviour although they usually don't grow forever. Some of them are mysteriously similar to diatoms, radiolarians, or other unicellular microorganisms.

The character of the attractor images is quite different from what most people associate with fractals, and in fact, Hopalongs and Miras aren't fractals in the strict mathematical sense. They are plots of orbits of two-dimensional dynamic systems and could maybe referred to as orbit fractals.

Hopalong and Mira fractals show no self-similarity, and they lack the infinite complexity of the famous Mandelbrot Set. On the other hand, the way they are created is far more interesting to watch in real-time than the (usually boring) line-by-line growth of static Mandelbrot images.

From: http://www.mpeters.de/mpeweb/hop/about/attractors.htm

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