This nice book;
"Curves and Surfaces in Geometric Modeling: Theory and Algorithms"
- by Jean Gallier, can now be downloaded for free from this page:
https://www.cis.upenn.edu/~jean/gbooks/geom1.html
He also provides other books, papers and notes that are relevant for us at his
home pages; starting here:
https://www.cis.upenn.edu/~jean/home.html
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
