CGAL users discussion list

[Guillaume Damiand <>]

Le 03/02/2015 10:22, Pranav a écrit :
> Guillaume Damiand wrote
> > Which version of cgal ?
> >
> > Do you have a minimal example ?
> >
> > Are you sure this error comes from the call of sew3_same_facets() ?
> > Because this function is called in the linear cell complex which
> > compiles on many different os and compilers...
> Compilation error is fixed now. I was passing /void/ as template arguments
> for /onSplit/ and /onMerge/ functors in /CGAL::Cell_attribute_with_point/
> class which I should have left uninitialized as they are initialized as
> /Null functors/ by default.
>
> But I would like to know whether we need to write functor for merge(which
> may happen during /sew3_same_facets()/) in the case when both vertices have
> same information unlike the example given  here
> <http://doc.cgal.org/latest/Linear_cell_complex/Linear_cell_complex_2linear_cell_complex_3_with_colored_vertices_8cpp-example.html>
> where merging vertices may have different color information(thus requiring
> averaging)?

It depends what you want to do with your attributes.

The default behaviour when two attributes are merged is to keep the 
first one. It could be ok for some applications.

If you need another behaviour, you need either to define your own 
onmerge functor, or a second possibility is to apply a post-processing 
on your attributes to modify their values.



> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Implementing-tetrahedral-mesh-with-cavities-using-Linear-cell-complex-tp4659399p4660385.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.


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Guillaume DAMIAND

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