Bezier Interpolation

http://www.antigrain.com/research/bezier_interpolation/
http://www.efg2.com/Lab/Graphics/Jean-YvesQueinecBezierCurves.htm

Good primer:
http://processingjs.nihongoresources.com/bezierinfo/

http://paulbourke.net/geometry
http://paulbourke.net/geometry/bezier

http://xtyler.com/code/104
http://cagd.cs.byu.edu/~557/text/
http://cagd.cs.byu.edu/~557/text/ch7.pdf