Dear Pito,

> I am looking for a basic geometry library with classes like Point, Line,
> Rect, etc. And with operations like
> 

not exactly a Ruby library, but quite large and fast (written in C++) is CGAL:

http://www.cgal.org/

It already has Python bindings ...

Maybe you can use it also via ffi ?

http://wiki.github.com/ffi/ffi


Best regards,

Axel 
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