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[Chris Theis <>]

Hello,

I'm currently trying to implement a module which needs to perform boolean
operations on polyhedra. 
In general I'm using a class which is derived from CGAL::Polyhedron_3 for
managing my solids and for the boolean ops I would like to convert the
polyhedra to nef_polyhedra and then back.

If I do something like this:

  CSGPolyhedron<Kernel, CGAL::Polyhedron_items_3> TestPoly;
  CGAL::Nef_polyhedron_3<Kernel> TestSolid( TestPoly );

then the compiler is happy. However, I have extended my polyhedron items so
my actual conversion would look like:

  CSGPolyhedron<Kernel, CItemsEx> TestPoly;
  CGAL::Nef_polyhedron_3<Kernel> TestSolid( TestPoly );

CItemsEx is derived from CGAL::Polyhedron_items_3 and handles the
information for vertex & face normals. However, when I'm using my extended
items then the compiler starts complaining:

snc_structure.h(174): error C2903: 'Halffacet' : symbol is neither a class
template nor a function template
....and many more error messages

I could trace this problem back to the use of the extended items. In
principle I would not need the extended functionality within the nef
polyhedra. But I don't know how to do the conversion of my extended
polyhedron to the nef_polyhedron. The available constructors do not seem to
work.

Is there any other way to do this? I'd greatly appreciate any hint in this
direction because I would really like to keep my extended items for the
polyhedra.

Thanks a lot
Chris




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