CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le Wednesday, September 6, 2017 2:32:13 PM CEST Sebastien Loriot 
(GeometryFactory) a écrit :
> On 09/05/2017 06:10 PM, Iasonm wrote:
> > I want to normalize a Vector_3 and I cant the function that does the job.
> > 
> > 
> > 
> > --
> > Sent from: http://cgal-discuss.949826.n4.nabble.com/
> 
> There is none (the main reason being that it is not an exact operation).
> You can use the squared_length() member function as below (provided you
> have a kernel with sqrt supported):
> 
> v=v/std::sqrt(v.squared_length());

When the number type of the kernel is not `double`, use `CGAL::sqrt` instead 
of `std::sqrt`. `CGAL::sqrt` works for example on 
`Exact_predicates_esact_construction_with_sqrt_kernel::FT`, but not 
`std::sqrt`.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/