de Casteljau's algorithm
* The de Casteljau algorithm uses line paths and linear interpolation to create curve paths. Choose a Bezier curve order and a value of t. Then use the slider to step through construction of the curve.
* Click on Animate to watch the construction as t changes from 0 to 1. This is best done for the final step of the construction for each type of Bezier curve.
* If you uncheck "Show Bezier Curve", then check "Trace On" before starting the animation at t = 0, you can watch as the Bezier curve is traced out as t changes from 0 to 1. The "Clear Trace" button will clear the traced curve.
*The control points can be moved using the mouse.