A simple demonstration of Catmull-Rom spline curves. Click to place control points. Once four control points have been placed curve drawing will begin. Don't worry that it seems to be one behind where you click - this is normal. Press space to clear.
Thanks to my computer graphics professor, Dr. Nathan Gossett, for the equations driving this. And thanks, of course, to Ed Catmull and Raphael Rom for inventing these curves!