[x3d-public] UC Davis NURBS videos from undergrad graphics course (my teacher 23 years after my undergrad)

[John Carlson]

(1) NURBS crash course 1/4 - YouTube
<https://www.youtube.com/watch?v=mX5XFBi2wrI>
(1) NURBS crash course 2/4 - YouTube
<https://www.youtube.com/watch?v=JzoAeaa41pQ>
 (1) NURBS crash course 3/4 - YouTube
<https://www.youtube.com/watch?v=yMv9co3CKLg> (Doo-Sabin (subdivison)
Surface.  New material for me!  Check out Split Edge data structure!)
(1) NURBS crash course 4/4 - YouTube
<https://www.youtube.com/watch?v=NOCpf86s50w> (Catmull-Clark subdivision
surfaces, Loop subdivision)

No wonder people use NURBS!

Note:  NURBS doesn't do circles, the are sines and cosines--so are my
parametric geometry.

Ken says NURBS was invented around 1974. Do we need 2 more years before
patents expire?

As I talked about, where two surfaces meet, control Points are shared, and
controlPoints on the edges must go through colinear lines, the control
point midpoint between two control Points on opposite surfaces.  The
control point on the edge bisect the line. It's described in pt 1 and pt 2.

Good resource for people learning or relearning.

John
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