CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Use for_each instead.

Sebastien.

Hamid G wrote:
> On Mon, Nov 14, 2011 at 12:06 PM, Sebastien Loriot (GeometryFactory)
> <>
>  wrote:
> > typedef C3t3::Triangulation::Weighted_point Weighted_point;
> > typrdef C3t3::Triangulation::Finite_vertices_iterator Vertices_iterator;
> >
> > for (Vertices_iterator itv=c3t3.triangulation().finite_vertices_begin(),
> >                     itv_end=c3t3.triangulation().finite_vertices_end();
> >     itv!=itv_end;++itv)
> > {
> >  itv->point()=
> >    Weighted_point(itv->point().point()+K::Vector_3(x0,y0,z0),
> >                   itv->point().weight());
> > }
>
> Thanks for the help.
> I was just wondering how I could do this using a function object
> that can be passed to STL's helpers such as 'std::transform'
>
> I tried something like this:
>
> class addoffset : public std::unary_function<Tr::Vertex,void>
> {
>     K::Vector_3 _offset;
> public:
>     explicit addoffset(double x, double y, double z) :
> _offset(K::Vector_3(x,y,z)) {}
>
>     void operator()(Tr::Vertex& v)
>     {
>         v.point()=Weighted_point(v.point().point() + _offset,
> v.point().weight());
>     }
> };
>
> addoffset Offset(x0,y0,z0);
> std::transform(tr.finite_vertices_begin(), tr.finite_vertices_end(),
> tr.finite_vertices_begin(),Offset);
>
> which of-course didn't work.