CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Edouard Oudet wrote:
> Thank you for your fast answer.
> Could you precise in which sense it is not a surface ? I just checked 
> that there is no self intersection and I didn't detect any other 
> problem. Surely I am missing some points...
Inside the volume, you have at least two edges shared by three triangles 
each. If you load it in the Polyhedron demo of CGAL, you will see red 
edges (they are the non-manifold one)

S.

> Edouard.
>
> > edouard wrote:
> > > Dear CGAL users,
> > >
> > > Under linux 64b ubuntu 10.10 I am experimenting some troubles when 
> > > using the
> > > example code "mesh_polyhedral_domain". The small example works fine 
> > > with the
> > > oringinal mesh but when I replace the data/elephant.off file by the 
> > > following
> > > one :
> > >
> > > http://www.lama.univ-savoie.fr/~oudet/Download/Meshes/elephant.off
> > This input cannot be handle by Polyhedron_3 (this is not a surface).
> > The polyhedron is then empty when you call the mesh algorithm.
> > In debug mode you would have had a precondition error.
> >
> > S.
> >
> >
> > > I obtain
> > > ./mesh_polyhedral_domain terminate called after throwing an instance 
> > > of 'std::bad_alloc'
> > >   what():  std::bad_alloc
> > > Aborted
> > >
> > > The input file seems to be OK. As reported in the mailing list, I 
> > > checked that
> > > the option -frounding-math is turned on. See below the output of the 
> > > cmake/make
> > > process.
> > >
> > > Any help/comment are welcome,
> > >
> > > best regards, Edouard Oudet.
> > >
> > >
> > >
> > > [100%] Building CXX object
> > > CMakeFiles/mesh_polyhedral_domain.dir/mesh_polyhedral_domain.o
> > > /usr/bin/c++   -DCGAL_USE_ZLIB -frounding-math -O3 -DNDEBUG
> > > -I/home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3/../../include
> > > -I/home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3
> > > -I/home/oudet/C++/CGAL/CGAL-3.7/include   -o
> > > CMakeFiles/mesh_polyhedral_domain.dir/mesh_polyhedral_domain.o -c
> > > /home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3/mesh_polyhedral_domain.cpp
> > > Linking CXX executable mesh_polyhedral_domain
> > > /usr/bin/cmake -E cmake_link_script
> > > CMakeFiles/mesh_polyhedral_domain.dir/link.txt --verbose=1
> > > /usr/bin/c++    -frounding-math -O3 -DNDEBUG  
> > > CMakeFiles/mesh_polyhedral_domain.dir/mesh_polyhedral_domain.o    -o
> > > mesh_polyhedral_domain -rdynamic -L/home/oudet/C++/CGAL/CGAL-3.7/lib
> > > /home/oudet/C++/CGAL/CGAL-3.7/lib/libCGAL_ImageIO.so
> > > /home/oudet/C++/CGAL/CGAL-3.7/lib/libCGAL.so -lgmpxx -lmpfr -lgmp
> > > -lboost_thread-mt -lGLU -lGL -lSM -lICE -lX11 -lXext -lz
> > > /home/oudet/C++/CGAL/CGAL-3.7/lib/libCGAL_ImageIO.so
> > > /home/oudet/C++/CGAL/CGAL-3.7/lib/libCGAL.so -lgmpxx -lmpfr -lgmp
> > > -lboost_thread-mt -lGLU -lGL -lSM -lICE -lX11 -lXext -lz
> > > -Wl,-rpath,/home/oudet/C++/CGAL/CGAL-3.7/lib make[2]: Leaving 
> > > directory `/home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3'
> > > /usr/bin/cmake -E cmake_progress_report
> > > /home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3/CMakeFiles  5
> > > [100%] Built target mesh_polyhedral_domain
> > > make[1]: Leaving directory 
> > > `/home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3'
> > > /usr/bin/cmake -E cmake_progress_start
> > > /home/oudet/C++/CGAL/CGAL-3.7/examples/Mesh_3/CMakeFiles 0