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Philipp Moeller 
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>Helmi Ben Hmida 
><>
> writes:
>
>> I would like to read the content of an IFC file (or VRML if not) from
>> the CGAL library and store the different geometries inside in the
>> nefPolyhderon Structure in order to apply certain topologic operaion
>> on them later on.
>
>As Sebastien already told you: The simplest way is probably to convert
>your files to the OFF format [1], use those files to create a
>CGAL::Polyhedron and construct a CGAL::Nef_polyhedron [2] from those files.
>
>The documentation for Polyhedron [3] even says that it supports VRML
>files, but I have never used this.
>
>HTH,
>Philipp Moeller
>
>[1] : http://www.holmes3d.net/graphics/offfiles/
>[2] : 
>http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3_ref/Class_Nef_polyhedron_3.html
>[3] : 
>http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Polyhedron/Chapter_main.html#Section_25.4
>
>
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