September 30, 2010 Update to Functional Equations Reference (version 1.3) This is a substantial update of this reference document. The most important addition is the chain and substitution rules for arithmetic difference calculus (ADC)….

June 15, 2010 Region Quadtrees in C++ (Original image by GoAwayStupidAI). Below are four C++ implementations of the region quadtree (the kind used for image compression, for example). The different implementations…

April 9, 2009 Cellular Automata for Simulation in Games A cellular automata system is one of the best demonstrations of emergence. If you do not know what cellular automata (CA) is, then you…