# Mandelbrot

An implementation of the the Mandelbrot set exercise from the end of
chapter two of O'Reilly's
[*Programming Rust*](http://shop.oreilly.com/product/0636920040385.do).

I have deviated from the original in two ways, one major, one minor.

First, I've made the rendering plane, which maps from the cartesian
(pixel) plane to the complex plane, into a struct, and put all the major
rendering features into an implementation on that struct.  By adding a
simple method, `subplane()`, I was able to make crossbeam rendering much
simpler and easier to read by providing horizontal slices of the pixel
plane, and I was also able to avoid recalculating the relationship
between the two planes for every pixel.  A small performance boost, but
worthwhile.

Second, the output is PNM rather than PNG.  I'm a huge PNM partisan, and
you kids better get off my lawn.