https://www.ics.uci.edu/~eppstein/geom.html
http://jeffe.cs.illinois.edu/compgeom/
https://people.eecs.berkeley.edu/~jrs/274/
https://ocw.mit.edu/courses/mechanical-engineering/2-158j-computational-geometry-spring-2003/
原文：https://www.cnblogs.com/Searchor/p/14430879.html