Comment #5 on issue 450 by alexandr...(a)gmail.com: Non embedded edges
culling in Mondrian
http://code.google.com/p/moose-technology/issues/detail?id=450
it works. But it can be optimized I think. For example, I check if the
bounds given by the current window frame intersect the rectangle bounds of
the edge. This is clearly not optimal since we should check if the line
crosses the window frame.