Hermite Curve

http://paulbourke.net/miscellaneous/interpolation/

http://fivedots.coe.psu.ac.th/Software.coe/Java%20Games/Java3D/Muscle3D/Hermite/Hermite%20Curve%20Interpolation.htm

http://www.cs.helsinki.fi/group/goa/mallinnus/curves/curves.html