interesting stuff about geometry

1. a mesh composes of vertex attributes(geometry information) and adjacency(topology information). How about compress they independently? http://openctm.sourceforge.net/

2. Some special mesh can be generated automatically, does not need to add faces/vertices manually. check http://prideout.net/blog/?p=44 and http://structuresynth.sourceforge.net/

3. I'm always interested in the geometry engine of CAD or something like that. http://wildcat-cad.blogspot.com/