Mandelbrot Set ASCII Viewer (#172)

The Mandelbrot Set is the set of all complex points which, when one iteratively and infinitely applies the function , converge to a value. This simple rule results in stunning complexity and beauty.
Many Mandelbrot Set animations use regularly colored pixels to rep­re­sent the num­ber of iterations needed at the fractal’s edges to escape converging. Yet this mathematical object can also be represented as ASCII characters — similar to what I did in my Curses Cam post. The characters are chosen according to their opaqueness. A full stop (“.”) looks lighter than a dollar sign (“$”), so they rep­re­sent a smaller or larger num­ber of iterations needed. The order of characters used is taken from this post by Paul Bourke.
As there are on­ly 𝟩𝟢 characters used, each frame is being rendered twice to de­ter­mine the minimum num­ber of iterations needed by every point in that frame. Thereby the full visual character range is used.

The characters shown below rep­re­sent a Mandelbrot Set still. To see the zoom in action, either run the program (listed below) or take a look at this Mandelbrot Set ASCII journey.

      ..................''''''''``"">>II``''''......          
    ..................''''''''``^^,,ii::^^``''''......        
  ..................''''''''``^^::ww$$++,,````''''......      
................''''''''``^^^^""::$$$$$$::""^^``''''......    
..............''''''````""{{;;XX$$$$$$$$uuUU,,,,""''......    
............''''``````^^,,rr$$$$$$$$$$$$$$$$<<$$--``........  
........''``````````^^""LL$$$$$$$$$$$$$$$$$$$$__""``''......  
..''''''^^!!"""",,""""::__$$$$$$$$$$$$$$$$$$$$$$ll""''........
''''````^^::__IIYYii::ll$$$$$$$$$$$$$$$$$$$$$$$$pp^^''........
''``````"";;[[$$$$$$++__$$$$$$$$$$$$$$$$$$$$$$$$$$^^''''......
``^^^^,,;;>>$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ww``''''......
"",,,,II$$nn$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$""``''''......
"",,,,II$$nn$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$""``''''......
``^^^^,,;;>>$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ww``''''......
''``````"";;[[$$$$$$++__$$$$$$$$$$$$$$$$$$$$$$$$$$^^''''......
''''````^^::__IIYYii::ll$$$$$$$$$$$$$$$$$$$$$$$$pp^^''........
..''''''^^!!"""",,""""::__$$$$$$$$$$$$$$$$$$$$$$ll""''........
........''``````````^^""LL$$$$$$$$$$$$$$$$$$$$__""``''......  
............''''``````^^,,rr$$$$$$$$$$$$$$$$<<$$--``........  
..............''''''````""{{;;XX$$$$$$$$uuUU,,,,""''......    
................''''''''``^^^^""::$$$$$$::""^^``''''......    
  ..................''''''''``^^::ww$$++,,````''''......      
    ..................''''''''``^^,,ii::^^``''''......        

The fractal viewer is written in Python 2.7 and works by determining the terminal’s size and then printing a string of according size. This creates the illusion of a moving image, as the terminal will hopefully always perfectly scroll so that on­ly one frame is visible at a time. In the code’s first non-comment line one can change the complex point at the image’s center, (really, its conjugate, which is partially irrelevant as the set is symmetric along the real axis) the initial zoom value (complex distance above the image’s center), the zoom factor (the factor by which the zoom value gets multiplied after a frame), the total num­ber of frames ( - 𝟣 means there is no upper limit), the delay be­tween frames (in seconds, can be floating-point) and the color characters used.

The program’s source code may not be particularly easy to read, yet it does its job and on­ly requires seven non-comment lines! The code is shown below, though the .py file can also be downloaded.
To achieve the JavaScript animation linked to above, I wrote a simple Python converter which takes in the fractal renderer’s output and it spits out an HTML page. This converter’s code is not listed, though the .py file can be downloaded. Instructions on how to use the converter can be seen in its source code.