I put this together in 2004 to track deltas, visualize movement patterns, and experiment with user interfaces.
Get in touch @scottwwh.
You can move the box using the Move menu, cursor keys or numeric keypad (w/ Num Lock enabled).
The box's movement is recorded as X/Y deltas, effectively keyframes).
This set of numbers makes for good graphing material, requiring less memory and resolution-indepedence. It's also easier to transform from an arbitrary origin.
For now, this requires support for JavaScript 1.5 and CSS 2.1, and has been testing with IE 6.0, Mozilla 1.7, Firefox 0.9, and Safari 1.2.
This will change as things (especially graph generation) are moved to modern standards.
Put up the first version..