Surface of revolution examples

[hovey]

curve fitting:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5358887/
https://www.geometrictools.com/Documentation/BSplineCurveLeastSquaresFit.pdf
https://www.geometrictools.com/Samples/Mathematics.html
goblet:
https://demonstrations.wolfram.com/PottersWheel/
chess pawn:
http://docs.autodesk.com/3DSMAX/12/ENU/3ds%20Max%202010%20Tutorials/files/WSf742dab041063133-62b9306f112a19e40dd-7ffb.htm
https://www.clear.rice.edu/comp162/assignment02/assignment02.html