Javascript: Plotting Rössler Attractor on HTML5 Canvas in 3D

In this blog I demonstrated how one can programmatically explore several chaotic systems: logistic map, Barnsley fern and Lorenz system. While doing this I focused mainly on producing plots or, at least, generating trajectories of these systems with different programming languages. At the same time, on my personal web page I have a section fully devoted to this same topic, where one can plot trajectories of simple chaotic systems right in their browser. Until recently I had only 1- and 2-dimensional systems, but last week I added the Rössler attractor and in this post I am going to show how one can easily produce 3-dimensional plots using only HTML5 canvas and a very handy three.js library.

TDD: Tests are for Focus

In recent posts I have written much about testing as an inherent component of the software development process – the last one, for example, was devoted to some drawbacks of having tests. Now, to keep things in balance I will turn to an advantage of TDD which I happen to mention much less frequently than it deserves.