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[slee <>]

Hi,

I have a situation where inside my volume domain, I have surfaces that I
want the mesh to respect; however , these surfaces do not define a volume. A
simple example of my domain is a cube with a regular polygon (2D) that
completely fits inside and doesn't intersect any of the cube's faces. There
are no "sub-domains" since the polygon has no volume and the polygon can not
be combined with any other surfaces to form a volume. The polygon only
serves as a constraint on the elements; basically, I would like the elements
that intersect the polygon to be constrained to define this polygon.

I am able to do this with tetgen: I can define an arbitrary planar surface,
and the tetgen mesher will use that surface as a constraint on the
tetrahedrons. I would like to know if it is possible to do this with CGAL 3D
mesher, and if so, how can this be done for both polyhedral and labelled
volume image input domains? 

If this functionality doesn't exist as is, how could I go about adding it
myself?

Thx! 

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