If you like wave equations, you might also enjoy EmeWave: http://psych.colorado.edu/~oreilly/emewave.html http://psych.colorado.edu/~oreilly/emewave.html The

If you like wave equations, you might also enjoy EmeWave: http://psych.colorado.edu/~oreilly/emewave.html http://psych.colorado.edu/~oreilly/emewave.html The movies at the bottom of the page are great, and if you want to see how it's done, his papers give a thorough and rigorous explanation that is easy to translate into code.