Retro Programming

Xorshift is a simple, fast pseudorandom number generator developed by George Marsaglia. The generator combines three xorshift operations wh...

A project I'm working on needs a fast square root but I couldn't find anything suitable online. After implementing several versions ...

Recently I've entered a few of the programming challenges in the BASIC on the ZX Spectrum group on Facebook. They vary in difficultly b...

A flood fill is a graphical algorithm to colour an area of screen bounded by pixels of another colour. The scanline technique is a fast, sta...

While attempting to write a game in 256 bytes I needed a routine to draw lines, but Bresenham's line algorithm weighs in at approx ~120 ...

Langton's Ant is an automata which creates a complex pattern by following a couple of simple rules: If the ant is on an empty pixel,...

A few days ago I coded The Matrix digital rain effect, a fictional representation of the code for the virtual reality of The Matrix. The tec...