For overlaying two arrangements you need to implement a model of the OverlayTraits concept. Most of the time the things that need to be done are quite easy, therefore there are two implemented models of that concept in the package that are used to perform simple overlay and face overlay easily (namely Arr_default_overlay_traits and Arr_face_overlay_traits).
In those two models there are couple of empty implementation of the needed methods as they are not needed. But both of those classes are a model of OverlayTraits. Aren't those two good examples for OverlayTraits?
On Wed, Jun 25, 2008 at 12:06 AM, Paul Neugebauer <[hidden email]> wrote: