CGAL_POLYHEDRON_DEMO_USE_SURFACE_MESHER so that one can compile without the
remeshing and boolean operations.
That speeds the compilation of the demo, while developing another part of
the demo.
- Scene::bbox() is moved to Scene_nef_and_polyhedron_operations.cpp
- Fix display of Nef_polyhedron entries.
Details:
- no longer use <CGAL/Nef_3/OGL_helper.h>
- Scene::gl_render_nef_facets(Nef_polyhedron*) has been written from
scratch (inspired by pieces of OGL_helper).
- Use model light FRONT_AND_BACK for Nef_polyhedron entries, because
Nef_polyhedron does not have the inside_out operation.
Laurent Rineau